CN106732612A - A kind of corronil nano wire/composite titania material and its preparation method and application - Google Patents

A kind of corronil nano wire/composite titania material and its preparation method and application Download PDF

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CN106732612A
CN106732612A CN201611199923.XA CN201611199923A CN106732612A CN 106732612 A CN106732612 A CN 106732612A CN 201611199923 A CN201611199923 A CN 201611199923A CN 106732612 A CN106732612 A CN 106732612A
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corronil
nano wire
wire
copper
titania material
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孙静
朱书影
谢晓峰
王焱
陆冠宏
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Shanghai Institute of Ceramics of CAS
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Shanghai Institute of Ceramics of CAS
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    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
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    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
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Abstract

The present invention relates to a kind of corronil nano wire/composite titania material and its preparation method and application, the composite includes corronil nano wire and growth in situ in the titanium dioxide granule on the copper-nickel alloy nano-wire surface.The present invention uses wet chemistry method, in corronil nanowire surface hydrolysis growth titanium dioxide granule, so as to obtain corronil nano wire/composite titania material, and it is applied to photocatalytic degradation acetaldehyde under visible ray, reaches effectively degraded VOCs so as to the purpose of purify air.

Description

A kind of corronil nano wire/composite titania material and preparation method thereof and Using
Technical field
Nano composite material and its preparation side the present invention relates to a kind of Novel Dual metal alloy semiconductor heterostructure Method, belongs to the preparation field of catalysis material.
Background technology
Titanium dioxide (TiO2) due to excellent with physicochemical properties stabilization, chemically-resistant and photoetch, nontoxic, cheap etc. Point, as a kind of preferable semi-conducting material, is widely used in solar cell, photocatalysis hydrogen production and photocatalytic degradation organic The fields such as inorganic pollution.But TiO2Also there are some as a kind of exemplary wideband gap semiconductor material itself obvious not Foot, its energy gap is excessive, and photoresponse scope is narrower, can only receive ultraviolet excitation;And TiO2Be stimulated the electron hole of generation To easily compound, the reduction of photocatalysis efficiency is result in, it is there are many restrictions in actual applications.With opening for research Exhibition, many people propose by adulterating or loading some elements or compound to improve TiO2Photocatalytic activity, can expand Open up visible light-responded field (reference literature 1).
In recent years, many researchers attempt to construct energy by the way that titania nanoparticles are supported on different materials Enough improve the heterojunction structure of photocatalysis efficiency, including Ag/TiO2, Cu/TiO2, CeO2/TiO2, Graphene/TiO2, MoS2/TiO2, SnO2/TiO2Deng (reference literature 2-4).Wherein, metal/semiconductor heterostructure is partly led by improving photo-generated carrier in metal Body interface efficiently separate so as to improve its light capture and photo-catalysis capability, additionally, metal due to its local surface etc. from Daughter resonance effects, can not only improve the light absorbs of neighbouring semiconductor, and can be sensitized wide band gap semiconducter urges complex light There is red shift in the absorption spectrum of agent, realize visible absorption.
B.Babu et al. has been synthesized with core by easy two steps wet chemistry method carried titanium dioxide on copper nano-wire Copper metal nano wire/the composite titania material of shell structure, and have studied the composite material photocatalyst under ultraviolet light To the photocatalytic degradation capability (reference literature 5) of liquid phase organic pollution.But, copper nano-wire/TiO2Material is because of its metal half Schottky barrier is too low at conductor hetero-junctions, so as to be unfavorable for that the recombination rate for suppressing electron hole pair causes its light to a certain extent Catalysis activity still has much room for improvement, and copper nano-wire/TiO2Material easily inactivates denaturation, greatly limit its practical application.This hair Bright prepared corronil nano wire/composite titania material can effectively degrade the volatilization such as aldehydes gas under current system Property organic compound, and Photocatalytic Degradation Property higher is respectively provided with ultraviolet light and visible ray.The composite has new Newness and novelty, have broad application prospects in terms of removal haze precursor pollutant and indoor polluted gas.
Prior art literature:
Yi-Hsing Lin, Hsin-Ta Hsueh, the et al.Applied Catalysis B of document 1:Environmental 199(2016)1–10;
Changchao Jia, Ping Yang, the et al.ChemCatChem 2016,8,839-847 of document 2;
Weiwei Zhang, Hanlin Guo, the et al.Applied Surface Science 382 (2016) 128 of document 3- 134;
Yuxin Zhang, Ming Huang, the et al.J Mater Sci (2013) 48 of document 4:6728–6736;
Document 5 B.Babu, K.Mallikarjuna, et al.Materials Letters, 176 (2016) 265-269.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of new binary metal alloy semiconductor heterojunction structure Titanium dioxide base nano catalysis material and preparation method thereof, i.e., it is an object of the invention to provide a kind of corronil nanometer Line/composite titania material and preparation method thereof, another object of the present invention is to provide a kind of corronil nano wire/bis- Application of the titanium oxide composite material in purification of air.
On the one hand, the invention provides a kind of corronil nano wire/composite titania material (corronil nanometer The catalysis material of line/titania nanoparticles semiconductor heterostructure), the composite includes corronil nano wire And growth in situ is in the titanium dioxide granule on the copper-nickel alloy nano-wire surface.
The present invention is carried metal from corronil nano wire, and titanium dioxide granule is grown in its surface in situ, is obtained A kind of high-performance optical catalyst with bimetallic semiconductor heterostructure.Wherein, corronil nano wire one-dimentional structure is in electricity Sub- transmission aspect has unique advantage, quickly can be conducted electronics compared to for nano particle, accelerates photoproduction electricity Son and the separation in hole, so that the recombination rate of photo-generate electron-hole is effectively inhibited, the photoproduction electricity separated under illumination condition Son and hole can occur chemistry and send out that superoxide radical and hydroxyl should be generated with absorption in the oxygen and water etc. of material surface respectively Free radical, the generation of more living radicals is so as to substantially increase the photocatalytic activity of composite.And corronil The core shell structure of nano wire is made up of the copper core of internal layer and the nickel shell of outer layer, due to the nickel shell height stable homogeneous of its outer layer, copper Nickel alloy nano wire shows significant stability within 65 DEG C of next months so that the composite material photocatalyst can be long-term Keep high catalytic activity.
It is preferred that the weight ratio of the copper-nickel alloy nano-wire and titanium dioxide granule is (0.01~0.20):1, preferably (0.01~0.05):1.
It is preferred that a diameter of 20~200nm of the copper-nickel alloy nano-wire, length is 1~20 μm, wherein copper and mickel Mol ratio be (8~1):1, preferably 4:1.The core shell structure of the corronil nano wire uniqueness used in the present invention is by interior The copper core of layer and the nickel shell composition of outer layer, the wherein mol ratio of copper and mickel is (8~1):1 (preferably 4:1) when, the nickel of its outer layer Shell keeps height stable homogeneous substantially, just allows that the composite material photocatalyst keeps high catalytic activity for a long time.
It is preferred that the particle diameter of the titanium dioxide granule is 50~300nm, preferably 150~250nm.
On the other hand, present invention also offers a kind of preparation method of corronil nano wire/composite titania material, Including:
Hanged to deionized water and organic titanium source, sustained response 0.5~24 hour is added in corronil nanowire dispersion Turbid liquid;
By gained suspension through centrifuge washing, vacuum drying after, in inert atmosphere at 200~600 DEG C make annealing treatment 1~12 Hour, obtain the copper-nickel alloy nano-wire/composite titania material photochemical catalyst.
The present invention carries out isopropyl titanate hydrolysis generation titanium dioxide using wet chemistry method in corronil nanowire surface Grain, obtains the copper-nickel alloy nano-wire/titanium dioxide that pattern coats corronil nano wire for titania nanoparticles Composite.The present invention is prepared by normal temperature wet chemical method, and titania nanoparticles growth in situ is in corronil nanometer Line surface forms the structure that titania nanoparticles coat corronil nano wire.In the composite that the present invention is provided, Grain titania nanoparticles of uniform size are closely coated on around corronil nano wire, are a kind of new photocatalysis materials Material, and by adjusting Cu-Ni nano wires and TiO in the heterojunction structure composite2Weight ratio, obtained different photocatalysis Activity.
It is preferred that the dispersant of the copper-nickel alloy nano-wire dispersion liquid is organic solvent, preferably ethanol, methyl alcohol, different At least one in propyl alcohol, ethylene glycol, toluene and acetone.
It is preferred that the organic titanium source is isopropyl titanate or butyl titanate.
It is preferred that the mol ratio of the copper-nickel alloy nano-wire and organic titanium source is (0.01~0.50):1, preferably (0.01 ~0.20):1.
It is preferred that the inert gas is argon gas or nitrogen.
The third aspect, waves the invention provides a kind of corronil nano wire/composite titania material in catalytic degradation Application in hair property organic compound (VOC).VOC be formaldehyde, acetaldehyde, benzene, toluene, aromatic hydrocarbon in its Middle one kind.
Fourth aspect, the invention provides a kind of corronil nano wire/composite titania material coating.Its preparation side Method:Above-mentioned corronil nano wire/composite titania material is disperseed by solvent, blade coating forms composite on substrate Coating.The coating can effectively degrade gaseous contaminant under light illumination.
It is preferred that the solvent is ethanol.
Also, it is preferred that the copper-nickel alloy nano-wire/composite titania material is (1- with the ratio of the quality of solvent 10):(90-99).
It is preferred that the coated weight of the coating is every square metre of 10~20g.
The present invention uses wet chemistry method, in corronil nanowire surface hydrolysis growth titanium dioxide granule, so as to obtain Corronil nano wire/composite titania material, and it is applied to photocatalytic degradation acetaldehyde under visible ray, reach effectively drop Solution VOCs is so as to the purpose of purify air.Simultaneously by adjusting different Cu-Ni nano wires and TiO2Weight ratio, obtain visible The optimal composite coating material of photocatalytic activity.
The preparation method of corronil nano wire/composite titania material that the present invention is provided has following features:
(1) present invention combines the corronil nano wire and traditional photocatalysis material of titanium dioxide of stable performance, into Work(is prepared for the metal semiconductor heterogeneous structural nano composite with high catalytic performance, the presence energy of corronil nano wire Enough photo-generate electron-holes that effectively suppresses can promote the composite system to generate more activity to being combined, under illumination condition Free radical, so as to substantially increase the photocatalytic activity of traditional photocatalysis material of titanium dioxide;
(2) present invention process is simple, relatively low to experimental facilities requirement, and experimental raw is cheap and easy to get, the corronil nanometer for obtaining Line/composite titania material had both maintained the crystal structure and composition of base semiconductor photochemical catalyst, while improve partly leading The visible light photocatalysis active of body photochemical catalyst;
(3) the corronil nano wire/composite titania material aldehydes gas etc. that can effectively degrade prepared by the present invention are waved Hair property organic compound, and Photocatalytic Degradation Property higher is respectively provided with ultraviolet light and visible ray.Material settling out is repeated Utilize, had broad application prospects in terms of removal haze precursor pollutant and indoor polluted gas.
Brief description of the drawings
Fig. 1 is the SEM figures of the pure titinium dioxide sample of preparation in comparative example 1;
Fig. 2 is the TEM figures of the pure titinium dioxide sample of preparation in comparative example 1;
Fig. 3 is the SEM figures of the corronil nano wire/composite titania material of preparation in embodiment 1;
Fig. 4 is the TEM figures of the corronil nano wire/composite titania material of preparation in embodiment 1;
Fig. 5 is the SEM figures of the corronil nano wire/composite titania material of preparation in embodiment 2;
Fig. 6 is the TEM figures of the corronil nano wire/composite titania material of preparation in embodiment 2;
Fig. 7 is the SEM figures of the corronil nano wire/composite titania material of preparation in embodiment 3;
Fig. 8 is the TEM figures of the corronil nano wire/composite titania material of preparation in embodiment 3;
Fig. 9 is the SEM figures of the corronil nano wire/composite titania material of preparation in embodiment 4;
Figure 10 is the TEM figures of the corronil nano wire/composite titania material of preparation in embodiment 4;
Figure 11 is different corronil nano wire/TiO in comparative example 1-2 and embodiment 1-42The catalysis material system of part by weight Standby composite coating distinguishes the degradation curve of aldehydes gas under visible light;
Figure 12 is different corronil nano wire/TiO in comparative example 1-2 and embodiment 1-42The catalysis material system of part by weight Standby composite coating distinguishes the degradation curve of aldehydes gas under ultraviolet light;
Figure 13 is the SEM figures of the copper nano-wire/composite titania material of preparation in comparative example 5;
Figure 14 is the TEM figures of the copper nano-wire/composite titania material of preparation in comparative example 5;
Figure 15 is copper nano-wire/TiO prepared by comparative example 52Composite coating prepared by the catalysis material of part by weight is visible The degradation curve of aldehydes gas under light;
Figure 16 is copper nano-wire/TiO prepared by comparative example 52Composite coating prepared by the catalysis material of part by weight is ultraviolet The degradation curve of aldehydes gas under light.
Specific embodiment
The present invention is further illustrated below by way of following implementation methods, it should be appreciated that following implementation methods are merely to illustrate this Invention, is not intended to limit the present invention.
The present invention is prepared by hydrolyzing generation titanium dioxide granule in the corronil nanowire surface with rock-steady structure High-performance optical catalyst with bimetallic semiconductor heterostructure, preparation method is simple to operation, with corronil nanometer Line is carried metal, has obtained Stability Analysis of Structures and the nano wire of the corronil with high visible light catalytic activity/titanium dioxide is multiple Condensation material.
In the present invention, the copper-nickel alloy nano-wire/composite titania material (binary alloy nano line/titanium dioxide Composite) include corronil nano wire and by ordinary-temp hydrolysis corronil nanowire surface growth in situ dioxy Change titanium particle.Cu-Ni nano wires and TiO in the copper-nickel alloy nano-wire/composite titania material2Weight ratio can be (0.01~0.20):1, preferably (0.01~0.05):1.Because the catalytic performance of composite and Cu-Ni nano wires and TiO2's Weight ratio is relevant, when it is higher than 0.2 that Cu-Ni nano wires content is excessively mass ratio, because playing the two of main photocatalysis Titanium oxide content is very few so the photocatalysis performance of composite is substantially reduced;When the very few i.e. mass ratio of Cu-Ni nano wire contents During less than 0.01, because there is serious agglomeration phenomenon and cause the photocatalysis performance of composite equally to drop significantly in titanium dioxide granule It is low, therefore Cu-Ni nano wires and TiO in the copper-nickel alloy nano-wire/composite titania material2Mass ratio can be (0.01 ~0.20):1, preferably (0.01~0.05):1.The diameter of the copper-nickel alloy nano-wire can be 20~200nm, length be 1~ 20μm.The particle diameter of the titanium dioxide granule can be 50~300nm, preferably 150~250nm.It is applicable to the growth present invention multiple The unique core shell structure of the corronil nano wire of condensation material is made up of the copper core of internal layer and the nickel shell of outer layer, wherein copper and mickel Mol ratio can be (8~1):1, preferably 4:1.
The present invention is with corronil nano wire as carried metal, isopropyl titanate or butyl titanate as organic titanium source, prepare Novel semi-conductor heterojunction structure composite coating with high visible light catalytic activity, it is right under visible light to substantially increase The degradation rate of aldehydes gas under current system, has widened the spectrum respective range of traditional titanium dioxide optical catalyst.The example below Property explanation the present invention provide corronil nano wire/composite titania material preparation method.
The preparation of the dispersion in organic solvent of corronil nano wire.Corronil nano wire is dispersed in into dispersant (has Machine solvent) in, the corronil nanowire dispersion of certain density stable homogeneous is obtained after ultrasonic disperse.Specifically, will The corronil nano wire obtained by reducing acetylacetone copper method is first cleaned three times with isopropanol, then is cleaned with ethanol three times, Last ultrasonic disperse obtains the corronil nanowire dispersion of stable homogeneous in dispersant.The copper-nickel alloy nano-wire The dispersant of dispersion liquid can be organic solvent, preferably at least in ethanol, methyl alcohol, isopropanol, ethylene glycol, toluene and acetone Kind.In addition, the preparation method of heretofore described corronil nano wire includes but are not limited to reduction acetylacetone copper method (ginseng See patent 201410153158.2), as long as the copper-nickel alloy nano-wire can be prepared.Wherein reduce acetylacetone copper Method includes:A) cationic surface active agent is dissolved in organic reducing agent;B) in the organic reducing agent obtained in step a) Mantoquita (acetylacetone copper) is added as copper source, and adds noble metal nano particles as catalyst, under the first set point of temperature Reaction;C) to adding nickel salt as nickel source in reacted reducing agent in step b), reacted under the second set point of temperature, gained is produced Product are cleaned, dried, and obtain final product the copper-nickel alloy nano-wire.Described organic reducing agent can be chain alkyl amine.Described is organic Reducing agent can be cetylamine or octadecylamine.The cationic surface active agent can be cetyl trimethylammonium bromide.It is described Cationic surface active agent can be dissolved in organic reducing agent at 100-250 DEG C.The mantoquita can be acetylacetone copper.Institute It can be nickel acetate to state nickel salt.The organic reducing agent, mantoquita, the mol ratio of nickel salt can be 330:(5~10):(2~15).It is described The first set point of temperature can be 120-200 DEG C in step b), and the reaction time can be 2-15 hours.Noble metal nano in the step b) Particle can be the Pt nano particles or Au nano particles synthesized in glycol system.The second set point of temperature can in the step c) It it is 200-250 DEG C, the reaction time can be -10 hours 30 minutes.
The preparation of corronil nano wire/composite titania material.Add in corronil nano wire alcohol dispersion liquid Enter appropriate amount of deionized water to hydrolyze titanium source, afterwards be stirred continuously it is lower by titanium source (such as isopropyl titanate, butyl titanate etc.) plus Enter in corronil nanowire dispersion, fully persistently 0.5~24h of stirring, to complete reaction, obtains suspension.It is specific next Say, the mol ratio of the copper-nickel alloy nano-wire and organic titanium source is (0.01~0.50):1, preferably (0.01~0.20):1.
By suspension washed for several times with organic solvent (for example, alcohol etc.) centrifugal filtration, afterwards vacuum drying obtain Powder precursor, by the powder precursor in an inert atmosphere high annealing to complete the crystallization of anatase phase titanium dioxide, i.e., Obtain corronil nano wire/composite titania material.The rotating speed of centrifuge washing can be 1000~10000rpm.Vacuum drying Temperature can be 50~80 DEG C, and drying time can be 2~12h.Atmosphere of inert gases can be argon gas or/and nitrogen.The annealing Temperature can be 200~600 DEG C, and the time of annealing can be 1~12h.
As a detailed example, isopropyl titanate is added drop-wise in corronil nanowire dispersion, after stirring fully, 60 DEG C of dryings overnight in vacuum drying oven are put into after alcohol centrifuge washing 4 times, then corronil nanometer is obtained in argon gas high annealing Line/composite titania material, wherein the amount of the isopropyl titanate for using and corronil nano wire is respectively 3~11ml and 0.02 ~0.06g, mixing time one hour, annealing conditions are the 3h that anneals at 450 DEG C.
The present invention is combined using corronil nano wire/titanium dioxide that above-mentioned wet chemistry method has been obtained pattern stable homogeneous Material.Understood referring to Fig. 1-8, the corronil nano wire/composite titania material pattern prepared by the above method is uniform A diameter of 20~200nm of Stability Analysis of Structures, wherein corronil nano wire, length is 1~20 μm, the particle diameter of titanium dioxide granule It is 50~300nm, preferably 150~250nm.
Corronil nano wire/composite titania material obtained above is passed through organic solvent (such as second by the present invention Alcohol etc.) disperse, ball milling, blade coating can obtain corronil nano wire/composite titania material coating.It should be understood that above-mentioned blade coating Mode be only example, can by other approach formed coating, such as spraying, spin coating etc..Following exemplary ground explanation cupro-nickel The preparation method of alloy nano-wire/composite titania material coating.
Corronil nano wire/the composite titania material that will be obtained using the above method is with alcohol solvent (for example, second Alcohol or water etc.) mixing and ball milling 1-48h formed solid content for 1-10% slurry, blade coating obtained on substrate corronil nanometer Line/composite titania material coating, the coating can degrade gaseous contaminant under light illumination.The coating base plate is chosen as Metal, ceramics or glass substrate.The copper-nickel alloy nano-wire/composite titania material coating coated weight can be every square metre 10~20g.
As a detailed example, gained corronil nano wire/composite titania material is dispersed in anhydrous second In alcohol, by obtaining corronil nano wire/composite titania material alcohol dispersion liquid after ball milling, by the dispersion liquid in glass Blade coating obtains corronil nano wire/titanium dioxide composite coating on substrate, and wherein corronil nano wire/titanium dioxide is combined The consumption of material and ethanol is respectively 0.2g and 2g, and Ball-milling Time is 24h, and blade coating area is 5cm*10cm, and the composite coating is scraped The quality of the corronil nano wire/composite titania material of painting is 0.01g.
Present invention also offers a kind of corronil nano wire/application of the composite titania material in purification of air, The specifically application in degraded VOC (VOC), the VOC can be formaldehyde, second Aldehyde, benzene, toluene, aromatic hydrocarbon etc..The copper-nickel alloy nano-wire/composite titania material coating is formed on a glass substrate Coating, the coating can effectively degrade gaseous contaminant under light illumination.To above-mentioned gained composite coating respectively in visible ray and Aldehydes gas test under photocatalytic degradation current system is carried out under ultraviolet light.Wherein the concentration of aldehydes gas can be 500ppm.Can See that light illumination condition can be 4*65W fluorescent lamps, UV Light condition can be 500W xenon lamps.The copper-nickel prepared by the present invention is closed Nanowires of gold/composite titania material can be 0.03%~60%, ultraviolet degradation to the Visible Light Induced Photocatalytic rate of aldehydes gas Rate can be 0.03%~90%.Respectively it can be seen from Figure 11 and Figure 12, for using above method gained corronil nano wire/ The visible light photocatalysis active highest of composite titania material, wherein embodiment 2 (Cu-Ni wt%=3%), to acetaldehyde gas The degradation rate of body reaches 56%, and the visible light photocatalysis active of embodiment 1 (Cu-Ni wt%=1%) is (right also above comparative example 1 Than sample coating of titanium dioxide), the photocatalytic activity of embodiment 3 (Cu-Ni wt%=5%) is then slightly below the (control sample of comparative example 1 Coating of titanium dioxide);While the active also highest of the ultraviolet light photocatalysis of embodiment 2 (Cu-Ni wt%=3%), to aldehydes gas Degradation rate reach 88%, the ultraviolet light of embodiment 1 (Cu-Ni wt%=1%) and embodiment 3 (Cu-Ni wt%=5%) is urged Change activity and be above comparative example 1 (control sample coating of titanium dioxide).
Embodiment is enumerated further below to describe the present invention in detail.It will similarly be understood that following examples are served only for this Invention is further described, it is impossible to be interpreted as limiting the scope of the invention, those skilled in the art is according to this hair Some nonessential modifications and adaptations that bright the above is made belong to protection scope of the present invention.Following examples are specific Technological parameter etc. is also only that an example in OK range, i.e. those skilled in the art can be done properly by the explanation of this paper In the range of select, and do not really want to be defined in the concrete numerical value of hereafter example.
The preparation embodiment of monel nano wire
0.5g cetyl trimethylammonium bromides are dissolved in 8g cetylamines first;It is subsequently adding 1.3g acetylacetone copper conducts Copper source, and Pt nano particles are added as catalyst, to be reacted at 180 DEG C, the reaction time is 12 hours;Gone back to reacted again Add 0.2g nickel acetates as nickel source in former agent, reacted at 210 DEG C, the reaction time is 2 hours, products obtained therefrom is cleaned, dried, The copper-nickel alloy nano-wire is obtained final product, the wherein mol ratio of copper and mickel is 4:1.Following embodiments and comparative example, if without special theory It is bright to use corronil nano wire manufactured in the present embodiment.
Embodiment 1
The corronil nano wire of 0.0272g is dispersed in ultrasonic disperse 30 minutes in 100ml ethanol, uniform and stable dispersion is obtained Property good corronil nanowire dispersion, to 10ml deionized waters are added in the dispersion liquid, be added dropwise after lasting stirring The isopropyl titanate of 10.06ml, continues to stir 1h, after being sufficiently stirred for, with the rotating speed alcohol centrifuge washing 4 times of 4000rpm, is being put into In vacuum drying oven 60 DEG C vacuum drying 12h, then the powder precursor that will be obtained under an argon atmosphere 400 DEG C annealing 3h, that is, obtain The weight ratio of corronil nano wire/composite titania material powder, wherein corronil nano wire is 1%.Referring to Fig. 3, Fig. 4, its SEM figure and TEM figures for showing gained corronil nano wire/composite titania material powder, therefrom visible, gained Corronil nano wire/composite titania material pattern stable homogeneous.Wherein a diameter of the 5 of corronil nano wire~ 500nm, length is 1~20 μm, and the particle diameter of titanium dioxide granule is 1~200nm.
0.2g corronils nano wire/titanium dioxide powder is taken, adds 2g absolute ethyl alcohols, ball milling 24h to obtain corronil Nano wire/titanium dioxide alcohol dispersion liquid, is scratched on the glass plate of 5cm*10cm, and natural drying obtains corronil and receives Rice noodles/coating of titanium dioxide, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to be carried out to gained corronil nano wire/composite titania material coating Catalysis activity under visible ray is characterized and performance optimization, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, can See the fluorescent lamp that light illumination condition is 4*65W.The visible ray light of corronil nano wire/coating of titanium dioxide is urged in the present embodiment Change performance and see that Figure 11, wherein S1 are sample described in embodiment 1, degradation rate is 46% (± 5%).
Embodiment 2
The corronil nano wire of 0.0412g is dispersed in ultrasonic disperse 30 minutes in 100ml ethanol, uniform and stable dispersion is obtained Property good corronil nanowire dispersion, to 10ml deionized waters are added in the dispersion liquid, be added dropwise after lasting stirring The isopropyl titanate of 4.978ml, continues to stir 1h, after being sufficiently stirred for, with the rotating speed alcohol centrifuge washing 4 times of 4000rpm, is being put into In vacuum drying oven 60 DEG C vacuum drying 12h, then the powder precursor that will be obtained under an argon atmosphere 400 DEG C annealing 3h, that is, obtain The weight ratio of corronil nano wire/composite titania material powder, wherein corronil nano wire is 3%.Referring to Fig. 5, 6, its SEM figure and TEM figures for showing gained corronil nano wire/composite titania material powder, therefrom visible, gained copper Nickel alloy nano wire/composite titania material pattern stable homogeneous.Wherein a diameter of 5~500nm of corronil nano wire, Length is 1~20 μm, and the particle diameter of titanium dioxide granule is 1~200nm.
0.2g corronils nano wire/titanium dioxide powder is taken, adds 2g absolute ethyl alcohols, ball milling 24h to obtain corronil Nano wire/titanium dioxide alcohol dispersion liquid, is scratched on the glass plate of 5cm*10cm, and natural drying obtains corronil and receives Rice noodles/coating of titanium dioxide, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to be carried out to gained corronil nano wire/composite titania material coating Catalysis activity under visible ray is characterized and performance optimization, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, can See the fluorescent lamp that light illumination condition is 4*65W.The visible ray light of corronil nano wire/coating of titanium dioxide is urged in the present embodiment Change performance and see that Figure 11, wherein S2 are sample described in embodiment 2, degradation rate is 60% (± 5%).
Embodiment 3
The corronil nano wire of 0.0516g is dispersed in ultrasonic disperse 30 minutes in 100ml ethanol, uniform and stable dispersion is obtained Property good corronil nanowire dispersion, to 10ml deionized waters are added in the dispersion liquid, be added dropwise after lasting stirring The isopropyl titanate of 3.66ml, continues to stir 1h, after being sufficiently stirred for, with the rotating speed alcohol centrifuge washing 4 times of 4000rpm, is being put into In vacuum drying oven 60 DEG C vacuum drying 12h, then the powder precursor that will be obtained under an argon atmosphere 400 DEG C annealing 3h, that is, obtain The weight ratio of corronil nano wire/composite titania material powder, wherein corronil nano wire is 5%.Referring to Fig. 7, 8, its SEM figure and TEM figures for showing gained corronil nano wire/composite titania material powder, therefrom visible, gained copper Nickel alloy nano wire/composite titania material pattern stable homogeneous.Wherein a diameter of 5~500nm of corronil nano wire, Length is 1~20 μm, and the particle diameter of titanium dioxide granule is 1~200nm.
0.2g corronils nano wire/titanium dioxide powder is taken, adds 2g absolute ethyl alcohols, ball milling 24h to obtain corronil Nano wire/titanium dioxide alcohol dispersion liquid, is scratched on the glass plate of 5cm*10cm, and natural drying obtains corronil and receives Rice noodles/coating of titanium dioxide, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to be carried out to gained corronil nano wire/composite titania material coating Catalysis activity under visible ray is characterized and performance optimization, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, can See the fluorescent lamp that light illumination condition is 4*65W.The visible ray light of corronil nano wire/coating of titanium dioxide is urged in the present embodiment Change performance and see that Figure 11, wherein S3 are sample described in embodiment 3, degradation rate is 18% (± 5%).
Embodiment 4
The corronil nano wire of 0.169g is dispersed in ultrasonic disperse 30 minutes in 100ml ethanol, uniform and stable dispersion is obtained Property good corronil nanowire dispersion, to 10ml deionized waters are added in the dispersion liquid, 3.0ml is added dropwise after lasting stirring Isopropyl titanate, continue to stir 1h, after being sufficiently stirred for, with the rotating speed alcohol centrifuge washing 4 times of 4000rpm, dried vacuum is being put into In case 60 DEG C vacuum drying 12h, then the powder precursor that will be obtained under an argon atmosphere 400 DEG C annealing 3h, that is, obtain cupro-nickel conjunction The weight ratio of nanowires of gold/composite titania material powder, wherein corronil nano wire is 20%.Referring to Fig. 9,10, its The SEM figures and TEM figures of gained corronil nano wire/composite titania material powder are shown, therefrom visible, gained cupro-nickel is closed Nanowires of gold/composite titania material pattern stable homogeneous.Wherein a diameter of 5~500nm of corronil nano wire, length It it is 1~20 μm, the particle diameter of titanium dioxide granule is 1~200nm.
0.2g corronils nano wire/titanium dioxide powder is taken, adds 2g absolute ethyl alcohols, ball milling 24h to obtain corronil Nano wire/titanium dioxide alcohol dispersion liquid, is scratched on the glass plate of 5cm*10cm, and natural drying obtains corronil and receives Rice noodles/coating of titanium dioxide, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to be carried out to gained corronil nano wire/composite titania material coating Catalysis activity under visible ray is characterized and performance optimization, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, can See the fluorescent lamp that light illumination condition is 4*65W.The visible ray light of corronil nano wire/coating of titanium dioxide is urged in the present embodiment Change performance and see that Figure 11, wherein S4 are sample described in embodiment 4, degradation rate is 7% (± 5%).
Embodiment 5
Corronil nano wire/the titanium dioxide powder of the preparation of 0.2g embodiments 1 is taken, adds 2g absolute ethyl alcohols, ball milling 24h to obtain To corronil nano wire/titanium dioxide alcohol dispersion liquid, scratched on the glass plate of 5cm*10cm, natural drying is obtained Corronil nano wire/coating of titanium dioxide, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to be carried out to gained corronil nano wire/composite titania material coating Catalysis activity under ultraviolet light is characterized and performance optimization, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, purple Outer smooth illumination condition is the xenon lamp of 500W.The ultraviolet light photocatalysis of corronil nano wire/coating of titanium dioxide in the present embodiment Performance is shown in that Figure 12, wherein S1 are sample described in embodiment 1, and degradation rate is 80% (± 5%).
Embodiment 6
Take 0.2g embodiments 2 and prepare corronil nano wire/titanium dioxide powder, add 2g absolute ethyl alcohols, ball milling 24h to obtain Corronil nano wire/titanium dioxide alcohol dispersion liquid, is scratched on the glass plate of 5cm*10cm, and natural drying obtains copper Nickel alloy nano wire/coating of titanium dioxide, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to be carried out to gained corronil nano wire/composite titania material coating Catalysis activity under ultraviolet light is characterized and performance optimization, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, purple Outer smooth illumination condition is the xenon lamp of 500W.The ultraviolet light photocatalysis of corronil nano wire/coating of titanium dioxide in the present embodiment Performance is shown in that Figure 12, wherein S2 are sample described in embodiment 2, and degradation rate is 89% (± 5%).
Embodiment 7
Take 0.2g embodiments 3 and prepare corronil nano wire/titanium dioxide powder, add 2g absolute ethyl alcohols, ball milling 24h to obtain Corronil nano wire/titanium dioxide alcohol dispersion liquid, is scratched on the glass plate of 5cm*10cm, and natural drying obtains copper Nickel alloy nano wire/coating of titanium dioxide, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to be carried out to gained corronil nano wire/composite titania material coating Catalysis activity under ultraviolet light is characterized and performance optimization, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, purple Outer smooth illumination condition is the xenon lamp of 500W.The ultraviolet light photocatalysis of corronil nano wire/coating of titanium dioxide in the present embodiment Performance is shown in that Figure 12, wherein S3 are sample described in embodiment 3, and degradation rate is 68% (± 5%).
Embodiment 8
Take 0.2g embodiments 4 and prepare corronil nano wire/titanium dioxide powder, add 2g absolute ethyl alcohols, ball milling 24h to obtain Corronil nano wire/titanium dioxide alcohol dispersion liquid, is scratched on the glass plate of 5cm*10cm, and natural drying obtains copper Nickel alloy nano wire/coating of titanium dioxide, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to be carried out to gained corronil nano wire/composite titania material coating Catalysis activity under ultraviolet light is characterized and performance optimization, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, purple Outer smooth illumination condition is the xenon lamp of 500W.The ultraviolet light photocatalysis of corronil nano wire/coating of titanium dioxide in the present embodiment Performance is shown in that Figure 12, wherein S4 are sample described in embodiment 4, and degradation rate is 10% (± 5%).
Comparative example 1 (is free of corronil nano wire)
To 10ml deionized waters are added in 100ml ethanol, it is sufficiently stirred for, the isopropyl titanate of 5.00ml is then added dropwise while stirring, Continue to stir 1h, after being sufficiently stirred for, with the rotating speed alcohol centrifuge washing 4 times of 4000rpm, 60 DEG C of vacuum in vacuum drying oven is put into Dry 12h, then the powder precursor that will be obtained is annealed in the Muffle furnace 3h at 400 DEG C, that is, titanium dioxide powder is obtained, referring to figure 1st, 2, its SEM figure for showing gained titanic oxide material powder, therefrom visible, gained titanic oxide material pattern stable homogeneous, Even particle size, the particle diameter of titanium dioxide granule is 1~200nm.
0.2g pure titinium dioxide powders are taken, adds 2g absolute ethyl alcohols, ball milling 24h to obtain titanium dioxide alcohol dispersion liquid, will On the glass plate of 5cm*10cm, natural drying obtains coating of titanium dioxide to its blade coating, and the quality control of coating is 0.1g.
By degrade aldehydes gas test, come gained coating of titanium dioxide is carried out the catalysis activity under visible ray characterize and Performance optimizes, and coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, it is seen that light illumination condition is glimmering for 4*65W's Light lamp.The visible light photocatalysis performance of coating of titanium dioxide is shown in that Figure 11 and Figure 15, wherein S5 are described in comparative example 1 in this comparative example Sample, degradation rate is 37% (± 5%).
Comparative example 2 (is free of titanium dioxide)
By the preparation embodiment of above-mentioned monel nano wire by reducing the corronil nano wire that acetylacetone copper method is obtained First cleaned with isopropanol three times, then cleaned with ethanol three times, finally take 0.2g ultrasonic disperses in ethanol, obtain stable homogeneous Corronil nano wire alcohol dispersion liquid.Scratched on the glass plate of 5cm*10cm, natural drying obtains corronil and receives Rice noodles coating, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to carry out the catalysis activity under visible ray to gained corronil nano wire coating Characterize and performance optimization, coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, it is seen that light illumination condition is 4* The fluorescent lamp of 65W.The visible light photocatalysis performance of corronil nano wire coating is shown in Figure 11 and Figure 15, wherein S6 in this comparative example The sample described in comparative example 2, degradation rate is 3% (± 5%).
Comparative example 3 (is free of corronil nano wire)
The pure titinium dioxide powder of the preparation of 0.2g comparative examples 1 is taken, adds 2g absolute ethyl alcohols, ball milling 24h to obtain titanium dioxide ethanol Dispersion liquid, is scratched on the glass plate of 5cm*10cm, and natural drying obtains coating of titanium dioxide, and the quality control of coating is 0.1g。
By degrading, aldehydes gas are tested, to carry out the catalysis activity table under ultraviolet light respectively to gained coating of titanium dioxide Levy and performance optimization, coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, and UV Light condition is 500W's Xenon lamp.The ultraviolet light photocatalysis performance of coating of titanium dioxide is shown in that Figure 12 and Figure 16, wherein S5 are described in comparative example 1 in this comparative example Sample, degradation rate is 43% (± 5%).
Comparative example 4 (is free of titanium dioxide)
Take the corronil nano wire ultrasonic disperse of preparation embodiment preparation of the above-mentioned monel nano wires of 0.2g in ethanol, Obtain the corronil nano wire alcohol dispersion liquid of stable homogeneous.Scratched on the glass plate of 5cm*10cm, spontaneously dried Corronil nano wire coating is obtained, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to carry out the catalysis activity under ultraviolet light to gained corronil nano wire coating Characterize and performance optimization, coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, and UV Light condition is 500W Xenon lamp.The ultraviolet light photocatalysis performance of corronil nano wire coating is shown in that Figure 12 and Figure 16, wherein S6 are right in this comparative example Sample described in ratio 4, degradation rate is 3% (± 5%).
Comparative example 5
The copper nano-wire of 0.0272g is dispersed in ultrasonic disperse 30 minutes in 100ml ethanol, uniform and stable favorable dispersibility is obtained Corronil nanowire dispersion, to 10ml deionized waters are added in the dispersion liquid, the different of 10.06ml is added dropwise after lasting stirring Titanium propanolate, continues to stir 1h, after being sufficiently stirred for, with the rotating speed alcohol centrifuge washing 4 times of 4000rpm, in vacuum drying oven is put into 60 DEG C vacuum drying 12h, then the powder precursor that will be obtained under an argon atmosphere 400 DEG C annealing 3h, that is, obtain corronil and receive The weight ratio of rice noodles/composite titania material powder, wherein corronil nano wire is 1%.Referring to Figure 13, Figure 14, it shows Go out the SEM figures and TEM figures of gained copper nano-wire/composite titania material powder, therefrom visible, gained copper nano-wire/dioxy Change titanium composite material pattern stable homogeneous.Wherein a diameter of 5~500nm of copper nano-wire, length is 1~20 μm, titanium dioxide The particle diameter of particle is 1~200nm.
0.2g copper nano-wires/titanium dioxide powder is taken, adds 2g absolute ethyl alcohols, ball milling 24h to obtain copper nano-wire/dioxy Change titanium alcohol dispersion liquid, scratched on the glass plate of 5cm*10cm, natural drying obtains copper nano-wire/titanium dioxide and applies Layer, the quality control of coating is 0.1g.
By degrading, aldehydes gas are tested, to carry out visible ray to gained copper nano-wire/composite titania material coating Under catalysis activity characterize and performance optimization, coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, it is seen that light light It is the fluorescent lamp of 4*65W according to condition.The visible light photocatalysis performance of copper nano-wire/coating of titanium dioxide is shown in figure in this comparative example 15, wherein Cu/TiO2Be comparative example 5 prepare copper nano-wire/composite titania material coating, its degradation rate be 28% (± 5%).
By degrading, aldehydes gas are tested, to carry out ultraviolet light to gained copper nano-wire/composite titania material coating Under catalysis activity characterize and performance optimization, coating quality is 0.1g, and the initial concentration of aldehydes gas is 500ppm, ultraviolet light light It is the xenon lamp of 500W according to condition.The ultraviolet light photocatalysis performance of corronil nano wire coating is shown in Figure 16 in this comparative example, wherein Cu/TiO2It is copper nano-wire/composite titania material coating prepared by comparative example 5, its degradation rate is 62% (± 5%).
By prepared corronil nano wire/composite titania material, using online photocatalytic system and meteorological color Spectrometer is studied its photocatalysis performance, and its test result is referring to table 1:
Table 1:Degradation rate tables of data of the corronil nano wire/composite titania material to mobile phase aldehydes gas
Industrial applicability:
What the present invention was provided prepares corronil nano wire/composite titania material method process is simple, will to experimental facilities Ask relatively low, experimental raw is cheap and easy to get, the corronil nano wire/composite titania material for obtaining both had maintained matrix and partly led The crystal structure and composition of body photochemical catalyst, while improve the visible light photocatalysis active of semiconductor light-catalyst;And this hair Bright prepared corronil nano wire/composite titania material coating can effectively degrade aldehydes gas etc. under current system VOC, and Photocatalytic Degradation Property higher is respectively provided with ultraviolet light and visible ray.Material settling out can be again It is multiple to utilize, had broad application prospects in terms of removal haze precursor pollutant and indoor polluted gas.

Claims (10)

1. a kind of corronil nano wire/composite titania material, it is characterised in that the composite includes corronil Nano wire and growth in situ are in the titanium dioxide granule on the copper-nickel alloy nano-wire surface.
2. corronil nano wire/composite titania material according to claim 1, it is characterised in that the copper-nickel The mass ratio of alloy nano-wire and titanium dioxide granule is(0.01~0.20):1, preferably(0.01~0.05):1.
3. corronil nano wire/composite titania material according to claim 1 and 2, it is characterised in that the copper A diameter of 20~200 nm of nickel alloy nano wire, length is 1~20 micron, and the mol ratio of wherein copper and mickel is(8~1):1, Preferably 4:1.
4. the corronil nano wire/composite titania material according to any one of claim 1-3, its feature exists In the particle diameter of the titanium dioxide granule is 50~300 nm, preferably 150~250 nm.
5. a kind of preparation method of corronil nano wire/composite titania material as any one of claim 1-4, It is characterised in that it includes:
Hanged to deionized water and organic titanium source, sustained response 0.5~24 hour is added in corronil nanowire dispersion Turbid liquid;
By gained suspension through centrifuge washing, vacuum drying after, in inert atmosphere at 200~600 DEG C annealing 1~ 12 hours, obtain the copper-nickel alloy nano-wire/composite titania material photochemical catalyst.
6. preparation method according to claim 5, it is characterised in that the dispersant of the copper-nickel alloy nano-wire dispersion liquid It is organic solvent, the preferably at least one in ethanol, methyl alcohol, isopropanol, ethylene glycol, toluene and acetone.
7. the preparation method according to claim 5 or 6, it is characterised in that the organic titanium source is isopropyl titanate or metatitanic acid Four butyl esters.
8. the preparation method according to any one of claim 5-7, it is characterised in that the copper-nickel alloy nano-wire and have The mol ratio of machine titanium source is(0.01~0.50):1, preferably(0.01~0.20):1.
9. a kind of corronil nano wire/composite titania material as any one of claim 1-4 is in catalytic degradation Application in VOC.
10. a kind of coating including corronil nano wire/composite titania material any one of claim 1-4.
CN201611199923.XA 2016-12-22 2016-12-22 A kind of corronil nano wire/composite titania material and its preparation method and application Pending CN106732612A (en)

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CN109499585A (en) * 2018-12-06 2019-03-22 中国科学院上海硅酸盐研究所 A kind of tantalum disulfide/composite titania material and its preparation method and application
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Application publication date: 20170531