CN103301829B - Compound photocatalyst sol and preparation method thereof - Google Patents
Compound photocatalyst sol and preparation method thereof Download PDFInfo
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- CN103301829B CN103301829B CN201310205352.6A CN201310205352A CN103301829B CN 103301829 B CN103301829 B CN 103301829B CN 201310205352 A CN201310205352 A CN 201310205352A CN 103301829 B CN103301829 B CN 103301829B
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Abstract
The invention discloses compound photocatalyst sol. The compound photocatalyst sol is characterized by comprising the following components of nano doped oxide sol and titanium dioxide nano sol with the molar ratio being 1:(1-64). The invention also discloses a preparation method of the compound photocatalyst sol. The compound photocatalyst sol disclosed by the invention has the beneficial effects that the particle diameter is uniform, the dispersivity is good and the stability is high; by compounding of two types of semiconductors with energy level matching, high quantum efficiency is obtained, and the photocatalytic performance of the material is improved; the electrical conductivity of the compound photocatalyst sol is improved, high-efficiency electron transmission performance and anti-static performance are obtained; and the preparation conditions are mild, the preparation process is simple and the application prospect is wide.
Description
Technical field
The present invention relates to Nano sol catalysis material and preparation field thereof, be specifically related to a kind of compound photocatalyst sol, and the preparation method of this compound photocatalyst sol.
Background technology
The mankind are while enjoying the superior material life that industrial civilization brings, and also in the disastrous effect tasting its environmental pollution brought, especially developing country is the most serious.The scientists of countries in the world, through unremitting effort, finds that TiO 2 sol has the effects such as nontoxic, sterilization, automatically cleaning, light degradation organic pollution.But its narrower energy gap limits its photoresponse scope and the easy compound in electron hole, inhibits its photocatalytic activity.
In order to improve the catalytic activity of colloidal sol further, researcher proposes multiple modification scheme.Researcher finds through great many of experiments, and the conductive site of different oxide is different, and photoelectron can inject lower conduction band, and photo-generate electron-hole is effectively separated, thus improves photocatalytic activity.Conduction colloidal sol, because of the electronic transmission performance that it is excellent, effectively can promote the separation of semiconductor photo-generated carrier, receive the extensive concern of researcher.Ask in Zhejiang University, publication number be 101032686 patent relate to a kind of preparation method of tin oxide titanium oxide original position complex sol, make complex sol have the catalytic effect effectively strengthened.Stannic oxide nano material, has particle diameter little, the advantage that specific area is large, but its lower conductance, strongly limit the development of its photoelectric properties.Please disclose preparation method's patent publication No. 101580270 of a kind of nano-doped tin oxide conduction colloidal sol in the firm seminar of Shi Li, by ion doping, successfully regulate and control the non-stoichiometric defect of tin oxide, reach the object optimizing photoelectric properties.The present invention designs mixed nanometer oxide conducting colloidal sol and titanium dioxide compound photocatalyst sol on this basis, utilize the efficent electronic transmission performance of conduction colloidal sol, the photo-generate electron-hole separating power that conjunction with semiconductors composite heterogenous junction structure is outstanding, effectively improves the photocatalytic activity of complex sol.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, a kind of compound photocatalyst sol is provided, by the semiconductor of compound two kinds of level-density parameter, obtain higher quantum efficiency, improve the photocatalysis performance of material.The present invention also provides the preparation method of this compound photocatalyst sol.
The technical scheme that the present invention is adopted for achieving the above object is:
A kind of compound photocatalyst sol, it is made up of mixed nanometer oxide sol and titanium dioxide nano sol, and wherein, the mol ratio of described mixed nanometer oxide sol and titanium dioxide nano sol is 1: 1 ~ 64.
The preparation method of described titanium dioxide nano sol is in the patent of 101791546A with reference to publication number, described technical scheme.
Described mixed nanometer oxide sol is fluorine doped tin oxide colloidal sol, antimony doped tin oxide colloidal sol, and fluorine antimony codope tin oxide sol, tin indium oxide colloidal sol is wherein a kind of.
Described mixed nanometer oxide sol is fluorine doped tin oxide colloidal sol, antimony doped tin oxide colloidal sol, the preparation method of fluorine antimony codope tin oxide sol and tin indium oxide colloidal sol, is in the patent of 101580270A with reference to publication number, described technical scheme.
Compound photocatalyst sol pH value is 6 ~ 8.
The domain size distribution of complex sol is 10 ~ 20nm.
The solid content of complex sol is 10 ~ 30wt%.
A preparation method for above-mentioned compound photocatalyst sol, it comprises the following steps:
(1) be 1: 1 ~ 64 in molar ratio, weigh mixed nanometer oxide sol and titanium dioxide nano sol respectively;
(2) mixed nanometer oxide sol step 1 weighed mixes with titanium dioxide nano sol, and is distributed in water;
(3) by the aqueous solution obtained by step (2), move in autoclave, under 100 ~ 200 DEG C of conditions, react 10 ~ 18 hours, obtain compound photocatalyst sol.
Described mixed nanometer oxide sol is fluorine doped tin oxide colloidal sol, antimony doped tin oxide colloidal sol, and fluorine antimony codope tin oxide sol, tin indium oxide colloidal sol is wherein a kind of.
Described compound photocatalyst sol pH value is 6 ~ 8.
The domain size distribution of described complex sol is 10 ~ 20nm.
The solid content of described complex sol is 10 ~ 30wt%.
The invention has the beneficial effects as follows:
(1) compound photocatalyst sol prepared of this method, uniform particle diameter, good dispersion, stability is high.
(2) compound photocatalyst sol prepared of the inventive method, by the semiconductor of compound two kinds of level-density parameter, obtains higher quantum efficiency, improves the photocatalysis performance of material.
(3) compound photocatalyst sol prepared of the inventive method, improves the electric conductivity of complex sol, obtains transmission performance and the antistatic property of efficient electronics.
(4) preparation condition of the present invention is gentle, and preparation technology is simple, is with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is FTO/TiO in example 2
2the XRD figure of compound photocatalyst sol.
Fig. 2 is FTO/TiO in example 2
2the TEM figure of compound photocatalyst sol.
Detailed description of the invention
Embodiment 1: the compound photocatalyst sol that the present embodiment provides, it is made up of mixed nanometer oxide sol and titanium dioxide nano sol, and wherein, the mol ratio of described mixed nanometer oxide sol and titanium dioxide nano sol is 1: 1 ~ 64.
Described mixed nanometer oxide sol is fluorine doped tin oxide colloidal sol, antimony doped tin oxide colloidal sol, and fluorine antimony codope tin oxide sol, tin indium oxide colloidal sol is wherein a kind of.
Compound photocatalyst sol pH value is 6 ~ 8.
The domain size distribution of complex sol is 10 ~ 20nm.
The solid content of complex sol is 10 ~ 30wt%.
A preparation method for above-mentioned compound photocatalyst sol, it comprises the following steps:
(1) be 1: 1 ~ 64 in molar ratio, weigh mixed nanometer oxide sol and titanium dioxide nano sol respectively;
(2) mixed nanometer oxide sol step 1 weighed mixes with titanium dioxide nano sol, and is distributed in water;
(3) by the aqueous solution obtained by step (2), move in autoclave, under 100 ~ 200 DEG C of conditions, react 10 ~ 18 hours, obtain compound photocatalyst sol.
Described mixed nanometer oxide sol is fluorine doped tin oxide colloidal sol, antimony doped tin oxide colloidal sol, and fluorine antimony codope tin oxide sol, tin indium oxide colloidal sol is wherein a kind of.
Described compound photocatalyst sol pH value is 6 ~ 8.
The domain size distribution of described complex sol is 10 ~ 20nm.
The solid content of described complex sol is 10 ~ 30wt%.
Embodiment 2: see Fig. 1 and Fig. 2, the present embodiment provides a kind of compound photocatalyst sol and preparation method thereof, and its component and step are all identical with embodiment 1, and its difference is,
A kind of compound photocatalyst sol, it is made up of fluorine-doped tin oxide Nano sol and titanium dioxide nano sol, and wherein, the mol ratio of described fluorine-doped tin oxide Nano sol and titanium dioxide nano sol is 1: 16.
A preparation method for above-mentioned compound photocatalyst sol, it comprises the following steps:
(1) be 1: 16 in molar ratio, weigh fluorine-doped tin oxide Nano sol and titanium dioxide nano sol respectively;
(2) fluorine-doped tin oxide Nano sol step 1 weighed mixes with titanium dioxide nano sol, and is distributed in water;
(3) by the aqueous solution obtained by step (2), move in autoclave, under 180 DEG C of conditions, react 15 hours, obtain compound photocatalyst sol.
Described compound photocatalyst sol pH value is 7.
The domain size distribution of described complex sol is 10nm.
The solid content of described complex sol is 20wt%.
XRD collection of illustrative plates shows that complex sol is by Anatase TiO
2fluorine SnO is mixed with rutile-type
2, photocatalysis result shows, when 6h is carried out in light-catalyzed reaction, compares with TiO 2 sol light degradation result, and complex sol improves 14% to the degradation rate of object.
Embodiment 3: the present embodiment provides a kind of compound photocatalyst sol and preparation method thereof, its component and step all with embodiment 1,2 identical, its difference is,
A kind of compound photocatalyst sol, it is made up of antimony-doped tin oxide nano colloidal sol and titanium dioxide nano sol, and wherein, the mol ratio of described antimony-doped tin oxide nano colloidal sol and titanium dioxide nano sol is 1: 1.
A preparation method for above-mentioned compound photocatalyst sol, it comprises the following steps:
(1) be 1: 1 in molar ratio, weigh antimony-doped tin oxide nano colloidal sol and titanium dioxide nano sol respectively;
(2) antimony-doped tin oxide nano colloidal sol step 1 weighed mixes with titanium dioxide nano sol, and is distributed in water;
(3) by the aqueous solution obtained by step (2), move in autoclave, under 150 DEG C of conditions, react 10 hours, obtain compound photocatalyst sol.
Described compound photocatalyst sol pH value is 6.
The solid content of described complex sol is 10wt%.
Embodiment 4: the present embodiment provides a kind of compound photocatalyst sol and preparation method thereof, its component and step all with embodiment 1,2,3 identical, its difference is,
A kind of compound photocatalyst sol, it is made up of fluorine antimony codope tin oxide nano colloidal sol and titanium dioxide nano sol, and wherein, the mol ratio of described fluorine antimony codope tin oxide nano colloidal sol and titanium dioxide nano sol is 1: 32.
A preparation method for above-mentioned compound photocatalyst sol, it comprises the following steps:
(1) be 1: 32 in molar ratio, weigh fluorine antimony codope tin oxide nano colloidal sol and titanium dioxide nano sol respectively;
(2) fluorine antimony codope tin oxide nano colloidal sol step 1 weighed mixes with titanium dioxide nano sol, and is distributed in water;
(3) by the aqueous solution obtained by step (2), move in autoclave, under 100 DEG C of conditions, react 12 hours, obtain compound photocatalyst sol.
Described compound photocatalyst sol pH value is 8.
The solid content of described complex sol is 15wt%.
Embodiment 5: the present embodiment provides a kind of compound photocatalyst sol and preparation method thereof, its component and step all with embodiment 1,2,3,4 identical, its difference is,
A kind of compound photocatalyst sol, it is made up of tin indium oxide Nano sol and titanium dioxide nano sol, and wherein, the mol ratio of described tin indium oxide Nano sol and titanium dioxide nano sol is 1: 64.
A preparation method for above-mentioned compound photocatalyst sol, it comprises the following steps:
(1) be 1: 64 in molar ratio, weigh tin indium oxide Nano sol and titanium dioxide nano sol respectively;
(2) tin indium oxide Nano sol step 1 weighed mixes with titanium dioxide nano sol, and is distributed in water;
(3) by the aqueous solution obtained by step (2), move in autoclave, under 200 DEG C of conditions, react 18 hours, obtain compound photocatalyst sol.
Described compound photocatalyst sol pH value is 7.
The solid content of described complex sol is 20wt%.
In above-described embodiment 1 ~ 5, the preparation method of described titanium dioxide nano sol is in the patent of 101791546A see publication number, described technical scheme.
A kind of preparation method of mixed-phase nano-titania hydrosol photocatalyst, it is characterized in that the concrete steps of the method are as follows: be 1:(0.005 ~ 0.1 by titanium precursors and crystal formation directed agents zirconates in the mol ratio of titanium dioxide contained by zirconates and titanium precursors) ratio be dissolved in aqueous slkali and be hydrolyzed, be precipitated; This precipitation after filtration, washing is to until the electrical conductivity of filtrate is less than 100 μ S/cm; Precipitation after washing is joined in acid solution, and controls the pH < 5 of solution, then at 60 ~ 100 DEG C of temperature, carry out glue solution 10 ~ 60 minutes, the solution through glue solution is carried out hydro-thermal reaction 12 ~ 24 hours at 120 ~ 180C temperature; Foreign ion in removing hydro-thermal afterproduct, the electrical conductivity to product is less than 100pS/cm, obtains mixed-phase nano-titania hydrosol photocatalyst.
In above-described embodiment 1 ~ 5, described fluorine doped tin oxide colloidal sol, antimony doped tin oxide colloidal sol, the preparation method of fluorine antimony codope tin oxide sol and tin indium oxide Nano sol is in the patent of 101580270A see publication number, described technical scheme.
A. fluorine SnO is mixed
2the preparation of colloidal sol: be material of main part with pink salt take fluoride as adulterant, the molal weight ratio of tin and fluorine, namely Sn: F=1:0.1 ~ 0.8; Both are dissolved in deionized water respectively, are made into certain density solution; NH is added under constantly stirring
3h
2o or NaOH aqueous slkali, adjust ph to 6 ~ 8, reaction generates precipitation, through still aging, the precipitation obtained is carried out washing to remove foreign ion; Then in described precipitation, add a certain amount of deionized water, then instill hydrogen peroxide or oxalic acid dispergation at low temperatures, then heat up gradually, backflow 2-4 hour; And then add above-mentioned a certain amount of adulterant fluoride, and at 120 ~ 160 DEG C hydro-thermal 20 ~ 30 hours: by the product centrifuge washing that obtains or vacuum filtration washing, until the electrical conductivity of filtrate is less than 100 μ S/cm; Again product is dissolved in a certain amount of deionized water and carries out ultrasonic disperse, finally obtain Doped Nanosize fluorine tin oxide colloidal sol; Described pink salt is Sn (NO
3)
4, Sn (SO
4)
2, SnCl
4or SnCl
2in any one; Described fluoride is NH
4any one in F or HF;
B. antimony SnO is mixed
2the preparation of colloidal sol: be material of main part with pink salt take trichloride antimony as adulterant, the molal weight ratio of tin and antimony, namely Sn: Sb=1: 0.01 ~ 0.05; Both are dissolved in deionized water respectively, are made into certain density solution; NH is added under constantly stirring
3h
2o or NaOH aqueous slkali, adjust ph to 6 ~ 8; Reaction generates precipitation, still aging, the precipitation obtained is carried out washing to remove foreign ion; Then in described precipitation, add a certain amount of deionized water, then instill hydrogen peroxide or oxalic acid dispergation at low temperatures, then heat up gradually, reflux 3 ~ 5 hours: then hydro-thermal 44 ~ 50 hours at 140 ~ 180 DEG C; The product centrifuge washing obtained or vacuum filtration are washed, until the electrical conductivity of filtrate is less than 100 μ S/cm: be dissolved in a certain amount of deionized water by product and carry out ultrasonic disperse, finally obtain nano antimony doped tin oxide colloidal sol; Described pink salt is Sn (NO
3)
4, Sn (SO
4)
2, SnCl
4or SnCl
2in any one; Adulterant used is trichloride antimony;
C. the SnO of antimony and fluorine is mixed
2the preparation of colloidal sol: take pink salt as material of main part, with fluoride and antimonide for adulterant, tin and the molal weight ratio of antimony with fluorine, namely Sn: Sb: F=1: 0.02:0.1; It is dissolved in deionized water respectively, is made into certain density solution, under constantly stirring, add NH
3h
2o or NaOH aqueous slkali, adjust ph to 6 ~ 8; Reaction generates precipitation, still aging, the precipitation obtained is carried out washing to remove foreign ion; Then in described precipitation, add a certain amount of deionized water, then instill hydrogen peroxide or oxalic acid dispergation at low temperatures, then heat up gradually, reflux 5 ~ 7 hours; And then add above-mentioned a certain amount of fluoride, and in then hydro-thermal 120 ~ 150 hours at 180 ~ 220 DEG C; The product centrifuge washing obtained or vacuum filtration are washed, until the electrical conductivity of filtrate is less than 100 μ S/cm; Again product is dissolved in a certain amount of deionized water and carries out ultrasonic disperse, finally obtain nano antimony doped and fluorine tin oxide colloidal sol.
D. the preparation method of tin indium oxide Nano sol: with indium salt for material of main part take pink salt as complexing agent, the molal weight ratio of indium and tin, namely In: Sn=9: 1; Both are dissolved in deionized water respectively, are made into certain density solution; NH is added under constantly stirring
3h
2o or NaOH aqueous slkali, adjust ph to 6 ~ 8, reaction generates precipitation, through still aging, the precipitation obtained is carried out washing to remove foreign ion; Then in described precipitation, add a certain amount of deionized water, then instill hydrogen peroxide or oxalic acid dispergation at low temperatures, then heat up gradually, backflow 2-4 hour; And then add above-mentioned a certain amount of pink salt, and at 120 ~ 160 DEG C hydro-thermal 20 ~ 30 hours: by the product centrifuge washing that obtains or vacuum filtration washing, until the electrical conductivity of filtrate is less than 100 μ S/cm; Again product is dissolved in a certain amount of deionized water and carries out ultrasonic disperse, finally obtain nano indium oxide tin oxide sol; Described indium salt is In (NO
3)
3or (CH
3cOO)
3any one in In; Described pink salt is Sn (NO
3)
4, Sn (SO
4)
2, SnCl
4or SnCl
2in any one.
But the foregoing is only better possible embodiments of the present invention; and be not used to limit to the scope of the claims of the present invention; therefore other embodiments of the step recorded in all utilization the present invention, component and application, and the equivalence change done, be all included in protection scope of the present invention.
Claims (1)
1. a compound photocatalyst sol, it is characterized in that, it is made up of mixed nanometer oxide sol and titanium dioxide nano sol, wherein, the mol ratio of described mixed nanometer oxide sol and titanium dioxide nano sol is 1:1 ~ 64, and described mixed nanometer oxide sol is fluorine doped tin oxide colloidal sol, antimony doped tin oxide colloidal sol, fluorine antimony codope tin oxide sol, tin indium oxide colloidal sol is wherein a kind of; Compound photocatalyst sol pH value is 6 ~ 8; The domain size distribution of complex sol is 10 ~ 20 nm; The solid content of complex sol is 10 ~ 30 wt%;
The preparation method of compound photocatalyst sol comprises the following steps:
(1) be 1:1 ~ 64 in molar ratio, weigh mixed nanometer oxide sol and titanium dioxide nano sol respectively;
(2) the mixed nanometer oxide sol that step (1) weighs is mixed with titanium dioxide nano sol, and be distributed in water;
(3) by the aqueous solution obtained by step (2), move in autoclave, under 100 ~ 200 DEG C of conditions, react 10 ~ 18 hours, obtain compound photocatalyst sol.
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| CN106000411B (en) * | 2016-05-23 | 2019-02-12 | 无锡市嘉邦电力管道厂 | Visible light-responded photoelectrocatalysimaterial material of support type and preparation method thereof |
| CN107262084B (en) * | 2017-08-02 | 2020-07-14 | 浙江笨鸟科技有限公司 | Composite photocatalyst sol and preparation process thereof |
| CN109248516A (en) * | 2018-10-12 | 2019-01-22 | 安徽科清净化科技有限公司 | A kind of graphene titanium dioxide compound high efficiency filter |
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| US20090162567A1 (en) * | 2007-12-19 | 2009-06-25 | Industrial Technology Research Institute | Method for manufacturing high performance photocatalytic filter |
| CN101580270A (en) * | 2009-06-26 | 2009-11-18 | 上海大学 | Method for preparing nano-doped tin oxide sol |
| CN102443291A (en) * | 2011-12-08 | 2012-05-09 | 上海工程技术大学 | Nanometer titanium dioxide (TiO2)-stannic oxide (SnO2) compound sol, coating and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101070226A (en) * | 2007-06-22 | 2007-11-14 | 中国洛阳浮法玻璃集团有限责任公司 | Low-radiation self-cleaning composite function glass and producing method |
| US20090162567A1 (en) * | 2007-12-19 | 2009-06-25 | Industrial Technology Research Institute | Method for manufacturing high performance photocatalytic filter |
| CN101580270A (en) * | 2009-06-26 | 2009-11-18 | 上海大学 | Method for preparing nano-doped tin oxide sol |
| CN102443291A (en) * | 2011-12-08 | 2012-05-09 | 上海工程技术大学 | Nanometer titanium dioxide (TiO2)-stannic oxide (SnO2) compound sol, coating and preparation method thereof |
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