CN104001491B - A kind of CeO2/ TiO2nano combined hollow ball catalyst and preparation method thereof - Google Patents
A kind of CeO2/ TiO2nano combined hollow ball catalyst and preparation method thereof Download PDFInfo
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Abstract
The open a kind of CeO of the present invention2/TiO2Nano combined hollow ball catalyst and preparation method, described CeO2/TiO2Nano combined hollow ball catalyst, first with polystyrene as template, with butyl titanate and six nitric hydrate ceriums for wall material raw material, is combined preparation CeO by sol-gal process and the sedimentation method2/TiO2The complex microsphere of cladding polystyrene, then calcining obtains CeO2/TiO2Nano combined hollow ball catalyst；Wherein polystyrene, butyl titanate and the consumption of six nitric hydrate ceriums, by polystyrene: butyl titanate: six nitric hydrate ceriums are 0.1 0.3g:0.2 8 × 10‑3mol:1‑6×10‑3mol.CeO prepared by the present invention2/TiO2Nano combined hollow ball catalyst, its size uniform, has good photocatalytic and heat stability.
Description
Technical field
The present invention relates to a kind of inorganic compounding hollow ball catalyst and preparation method thereof, particularly to a kind of size tunable
CeO2/TiO2Nano combined hollow ball catalyst and preparation method thereof.
Background technology
TiO2It is that there is good thermal stability, oxidability photocatalyst strong, cheap and easy to get and environmental catalysts.Have
The TiO of hollow-core construction2Microsphere is owing to having the construction features that density is low, specific surface area is big, Surface Permeability is good, light capture rate is high
And TiO2Self characteristic and be widely used in photocatalysis field.But TiO2Can only the absorbing wavelength ultraviolet less than 387nm
Light, low to solar energy utilization ratio, and TiO2Middle photo-generated carrier recombination rate is higher, and quantum efficiency is low, limits TiO2Hollow micro-
The actual application of ball.By other quasiconductors and TiO2It is combined, it is possible to use interface coupling effect between the two, makes light
Response range is widened, and can suppress the compound of photo-generated carrier, improves photocatalytic activity.The most existing about TiO2Compound
Patent report prepared by hollow ball.Patent such as Publication No. CN101905153A is prepared for a kind of zinc oxide with carbon ball for template
With titanium oxide composite hollow ball be applied to light degradation cationic blue dyestuff;The patent of Publication No. CN101623644A is adopted
Prepare cadmium sulfide and titanium oxide composite hollow ball by hydro-thermal method, two step infusion processes and sol-gal process and be applied to light degradation
Water hydrogen manufacturing.
Ceria as a kind of important rare earth oxide owing to having higher storage oxygen oxygen release and oxygen ion conduction energy
Power and stronger redox ability and be widely used in fuel cell, pollutant treatment and photocatalysis field.But,
The excellent Oxygen storage capacity of ceria is relevant with its thermal impedance, low-temperature reactivity and structural stability, and these influence factors make
Ceria can not meet the requirement of high temperature application.By CeO2With TiO2Carry out compound by the phase interaction between titanium with cerium atom
CeO can be improved with the regulation and control with structure2Heat stability, structure and characteristic electron.At present, to report employing molten for existing document
Sol-gel, homogeneous co-precipitation process and solvent-thermal method prepare CeO2With TiO2Nano-particle.(Chiara G, et al.
Structural and spectroscopic characterization of CeO2–TiO2 mixed oxides[J].
Journal of Materials Chemistry A,2013,1,10918-10926; Benjaram M R and
Ataullah K. Structural Characterization of CeO2-TiO2and V2O5/CeO2-TiO2
Catalysts by Raman and XPS Techniques[J]. The Journal of Chemical Physics B,
2003,107,5162-5167; Chockalingam K and Paramasivan G. Solvothermal Synthesis
of CeO2-TiO2 Nanocomposite for VisibleLight Photocatalytic Detoxification of
Cyanide [J]. Sustainable Chemistry Engineering, 2013,1,1555-1563).
Summary of the invention
An object of the present invention is to provide a kind of CeO2/TiO2Nano combined hollow ball catalyst, has hollow ball-shape knot concurrently
Structure and common CeO2/TiO2The feature of composite oxide particle, has high thermal stability, high-specific surface area, excellent light capture effect
Rate and storage oxygen release ability.
The two of the purpose of the present invention are to provide above-mentioned a kind of CeO2/TiO2The preparation side of nano combined hollow ball catalyst
Method.
The know-why of the present invention
Hollow Nano granule, as a kind of special nanostructured, is chemical in recent years and a day in material science forward position
Benefit important field of research, its obvious characteristic is have bigger internal void.Hollow micro nano structure has many unique
Character such as the biggest specific surface area, stability are high, density is low, high index of refraction, good surface chemical property and permeability and quilt
It is widely used in the aspects such as micro chemical reactor, sensor and catalysis material.
The CeO prepared for template with polystyrene spheres2/TiO2Nano combined hollow ball size uniformity, good dispersion and shape
Looks are controlled.CeO2/TiO2Nano combined hollow ball not only has high thermal stability, and its higher specific surface area is conducive to improving
Cerium oxide store performance.
Technical scheme
A kind of CeO2/TiO2Nano combined hollow ball catalyst, first with polystyrene as template, with butyl titanate
It is raw material with six nitric hydrate ceriums, is combined by sol-gel process and the sedimentation method and prepare CeO2/TiO2Cladding polystyrene
Complex microsphere, then calcining obtains CeO2/TiO2Nano combined hollow ball catalyst；
Wherein polystyrene, butyl titanate and the consumption of six nitric hydrate ceriums, by polystyrene: butyl titanate: six
Nitric hydrate cerium is 0.1-0.3g:0.2-8 × 10-3mol:1-6×10-3mol。
Above-mentioned CeO2/TiO2The preparation method of nano combined hollow ball catalyst, specifically includes following steps:
(1), 0.1-0.3g polystyrene, 0.5-2g deionized water, 10-50 μ L strong aqua ammonia and 20mL dehydrated alcohol are mixed
After Jun Yun, control temperature and be 60-75 DEG C, after rotating speed 300-500r/min carries out reacting 2-4h, obtain reactant liquor 1；
Described polystyrene spheres particle diameter is about 200-500nm；
(2), by 0.2-8 × 10-3Mol butyl titanate is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.01-
0.40mol/L tetra-n-butyl titanate ethanol solution；
Concentration is that 0.01-0.40mol/L tetra-n-butyl titanate ethanol solution adds step (1) gained in 0.5-1h anti-
Answer in liquid 1, control temperature be 60-75 DEG C, rotating speed be that 300-500r/min carries out reacting 2-4h, obtain reactant liquor 2；
(3), by 1-6 × 10-3Mol six nitric hydrate cerium is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.05-
0.3mol/L cerous nitrate ethanol solution；
It is that 0.05-0.3mol/L cerous nitrate ethanol solution adds step (2) gained reactant liquor 2 in 0.5-1h by concentration
In, control temperature be 60-75 DEG C, rotating speed be that 300-500r/min carries out reacting 2-4h, obtain reactant liquor 3；
By reactant liquor 3 centrifugation of gained, gained precipitate is dried 8-10 h at 60-80 DEG C and obtains yellowish toner
Body；
Faint yellow powder body is calcined 3-5h at 500-800 DEG C, naturally cools to room temperature and i.e. obtain CeO2/TiO2Nano combined sky
Bulbus cordis catalyst.
The CeO of above-mentioned gained2/TiO2Nano combined hollow ball catalyst, its grain size is uniform, good dispersion, particle diameter are
216nm-580nm, has preferable photocatalytic degradation capability, particularly photocatalytic degradation rhodamine B.
Beneficial effects of the present invention
A kind of CeO of the present invention2/TiO2Nano combined hollow ball catalyst, has hollow ball-shape structure and common CeO concurrently2/
TiO2The feature of composite oxide particle, therefore has high thermal stability, high-specific surface area, excellent light capture rate and storage and releases
Oxygen ability, has potential application prospect in catalysis, fuel cell and adsorbing material field.
Further, a kind of CeO of the present invention2/TiO2The preparation method of nano combined hollow ball catalyst, owing to it is prepared
Process uses polystyrene to be template, makes titanium salt and cerium salt dissolve with organic solvent, utilize Electrostatic Absorption make nano-titanium oxide and
Cerium oxide deposits, and calcining removes template and obtains CeO2/TiO2Nano combined hollow ball, therefore the preparation method of the present invention has system
Standby process is simple, and reaction condition is gentle, and can effectively control CeO2/TiO2The features such as the microscopic appearance of nano combined hollow ball, and
Final gained CeO2/TiO2The size uniform of nano combined hollow ball catalyst, good dispersion.
Accompanying drawing explanation
Fig. 1, the CeO of embodiment 5 gained2/TiO2The TEM figure of nano combined hollow ball catalyst；
Fig. 2, the CeO of embodiment 5 gained2/TiO2The SEM figure of nano combined hollow ball catalyst；
Fig. 3, the CeO of embodiment 5 gained2/TiO2The nano combined hollow ball catalyst light degradation situation to rhodamine B.
Detailed description of the invention
Below by embodiment and combine accompanying drawing the present invention is described in further detail, but it is not limiting as the present invention.
Reagent used in various embodiments of the present invention if no special instructions, is commercially available.
Polystyrene spheres, concentration is 2.5% w/v, Aladdin reagent company limited；Butyl titanate, six nitric hydrate ceriums,
Dehydrated alcohol, strong aqua ammonia is analytical pure level, from traditional Chinese medicines chemical reagent company limited；
The CeO of prior art2-TiO2Composite oxides are according to document (Chiara G, et al. Structural and
spectroscopic characterization of CeO2–TiO2 mixed oxides[J]. Journal of
Materials Chemistry A, 2013,1,10918-10926) it is prepared.
Embodiment 1
A kind of CeO2/TiO2Nano combined hollow ball catalyst, first with polystyrene as template, with butyl titanate
It is wall material raw material with six nitric hydrate ceriums, is combined by sol-gel process and the sedimentation method and prepare CeO2/TiO2Cladding polyphenyl second
The complex microsphere of alkene, then calcining obtains CeO2/TiO2Nano combined tiny balloon catalyst；
Wherein polystyrene, butyl titanate and the consumption of six nitric hydrate ceriums, by polystyrene: butyl titanate: six
Nitric hydrate cerium is 0.1g:0.2 × 10-3mol:1×10-3mol。
Above-mentioned CeO2/TiO2The preparation method of nano combined hollow ball catalyst, specifically includes following steps:
(1), by 0.1g polystyrene, 0.5g deionized water, 50 μ L strong aqua ammonia and 20mL dehydrated alcohol mix homogeneously, then
Controlling temperature is 60 DEG C, and rotating speed is to obtain reactant liquor 1 after 300r/min carries out reacting 2h；
Described polystyrene spheres particle diameter is about 200nm；
(2), by 0.2 × 10-3Mol butyl titanate is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.01mol/L metatitanic acid
Four N-butyl ethanol solution；
It is that 0.01mol/L tetra-n-butyl titanate ethanol solution adds step (1) gained reactant liquor 1 in 0.5h by concentration
In, control temperature be 60 DEG C, rotating speed carry out when being 300r/min reacting 2h, obtain reactant liquor 2；
(3), by 1 × 10-3Mol six nitric hydrate cerium is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.05mol/L nitric acid
Cerium ethanol solution；
It is that 0.05mol/L cerous nitrate ethanol solution adds in step (2) gained reactant liquor 2 in 0.5h by concentration, controls
Temperature is 60 DEG C, rotating speed carries out when being 300r/min reacting 2h, obtains reactant liquor 3；
By reactant liquor 3 centrifugation of gained, gained precipitate is dried 8h at 60 DEG C and obtains faint yellow powder body；
Faint yellow powder body is calcined 3h at 500 DEG C, naturally cools to room temperature and i.e. obtain the CeO that particle diameter is 216nm2/TiO2Nanometer
Composite hollow sphere catalyst.
Embodiment 2
A kind of CeO2/TiO2Nano combined hollow ball catalyst, first with polystyrene as template, with butyl titanate
It is wall material raw material with six nitric hydrate ceriums, is combined by sol-gel process and the sedimentation method and prepare CeO2/TiO2Cladding polyphenyl second
The complex microsphere of alkene, then calcining obtains CeO2/TiO2Nano combined hollow ball catalyst；
Wherein polystyrene, butyl titanate and the consumption of six nitric hydrate ceriums, by polystyrene: butyl titanate: six
Nitric hydrate cerium is 0.3g:8 × 10-3mol:4×10-3mol。
Above-mentioned CeO2/TiO2The preparation method of nano combined hollow ball catalyst, specifically includes following steps:
(1), by 0.3g polystyrene, 2g deionized water, 10 μ L strong aqua ammonia and 20mL dehydrated alcohol mix homogeneously, temperature is controlled
Degree is 70 DEG C, and rotating speed is, after 400r/min carries out reacting 4h, to obtain reactant liquor 1；
Described polystyrene spheres particle diameter is about 400nm；
(2), by 8 × 10-3Mol butyl titanate is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.40mol/L metatitanic acid four
N-butyl ethanol solution；
It is that 0.40mol/L tetra-n-butyl titanate ethanol solution adds in step (1) gained reactant liquor 1 in 1h by concentration,
Control temperature be 70 DEG C, rotating speed carry out when being 400r/min reacting 4h, obtain reactant liquor 2；
(3), by 4 × 10-3Mol six nitric hydrate cerium is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.2mol/L nitric acid
Cerium ethanol solution；
It is that 0.2mol/L cerous nitrate ethanol solution adds in step (2) gained reactant liquor 2 in 1h by concentration, controls temperature
Be 70 DEG C, rotating speed carry out when being 400r/min reacting 4h, obtain reactant liquor 3；
By reactant liquor 3 centrifugation of gained, gained precipitate is dried 9h at 80 DEG C and obtains faint yellow powder body；
Faint yellow powder body is calcined 5h at 500 DEG C, naturally cools to room temperature and i.e. obtain the CeO that particle diameter is 440nm2/TiO2Nanometer
Composite hollow sphere catalyst.
Embodiment 3
A kind of CeO2/TiO2Nano combined hollow ball catalyst, first with polystyrene as template, with butyl titanate
It is wall material raw material with six nitric hydrate ceriums, is combined by sol-gel process and the sedimentation method and prepare CeO2/TiO2Cladding polyphenyl second
The complex microsphere of alkene, then calcining obtains CeO2/TiO2Nano combined hollow ball catalyst；
Wherein polystyrene, butyl titanate and the consumption of six nitric hydrate ceriums, by polystyrene: butyl titanate: six
Nitric hydrate cerium is 0.2g:4 × 10-3mol: 6×10-3mol。
Above-mentioned CeO2/TiO2The preparation method of nano combined hollow ball catalyst, specifically includes following steps:
(1), by 0.2g polystyrene, 1g deionized water, 30 μ L strong aqua ammonia and 20mL dehydrated alcohol mix homogeneously, temperature is controlled
Degree is 75 DEG C, and rotating speed is, after 500r/min carries out reacting 3h, to obtain reactant liquor 1；
Described polystyrene spheres particle diameter is about 500nm；
(2), by 4 × 10-3Mol butyl titanate is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.2mol/L metatitanic acid four
N-butyl ethanol solution；
It is that 0.2mol/L tetra-n-butyl titanate ethanol solution adds in step (1) gained solution 1 in 0.8h by concentration, control
Temperature processed is 75 DEG C, rotating speed carries out when being 500r/min reacting 3h, obtains reactant liquor 2；
(3), by 6 × 10-3Mol six nitric hydrate cerium is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.3mol/L nitric acid
Cerium ethanol solution；
It is that 0.3mol/L cerous nitrate ethanol solution adds in step (2) gained solution 2 in 0.8h by concentration, controls temperature
Be 75 DEG C, rotating speed carry out when being 500r/min reacting 3h, obtain reactant liquor 3；
Then by reactant liquor 3 centrifugation of gained, gained precipitate is dried 10 h at 70 DEG C and obtains faint yellow powder body；
Then faint yellow powder body is calcined 4h at 800 DEG C, naturally cool to room temperature and i.e. obtain the CeO that particle diameter is 580nm2/TiO2
Nano combined hollow ball catalyst.
Embodiment 4
A kind of CeO2/TiO2Nano combined hollow ball catalyst, first with polystyrene as template, with butyl titanate
It is wall material raw material with six nitric hydrate ceriums, is combined by sol-gel process and the sedimentation method and prepare CeO2/TiO2Cladding polyphenyl second
The complex microsphere of alkene, then calcining obtains CeO2/TiO2Nano combined hollow ball catalyst；
Wherein polystyrene, butyl titanate and the consumption of six nitric hydrate ceriums, by polystyrene: butyl titanate: six
Nitric hydrate cerium is 0.3g:2 × 10-3mol: 3×10-3mol。
Above-mentioned CeO2/TiO2The preparation method of nano combined hollow ball catalyst, specifically includes following steps:
(1), by 0.3g polystyrene, 0.5g deionized water, 40 μ L strong aqua ammonia and 20mL dehydrated alcohol mix homogeneously, control
Temperature is 65 DEG C, and rotating speed is, after 400r/min carries out reacting 2h, to obtain reactant liquor 1；
Described polystyrene spheres particle diameter is about 300nm；
(2), by 2 × 10-3Mol butyl titanate is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.10mol/L metatitanic acid four
N-butyl ethanol solution；
It is to add in 0.10mol/L tetra-n-butyl titanate ethanol solution 1h in step (1) gained solution 1 by concentration, controls
Temperature is 65 DEG C, rotating speed carries out when being 400r/min reacting 3h, obtains reactant liquor 2；
(3), by 3 × 10-3Mol six nitric hydrate cerium is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.15mol/L nitric acid
Cerium ethanol solution；
It is that 0.15mol/L cerous nitrate ethanol solution adds in step (2) gained reactant liquor 2 in 1h by concentration, controls temperature
Degree is 65 DEG C, rotating speed carries out when being 400r/min reacting 2-4h, obtains reactant liquor 3；
By reactant liquor 3 centrifugation of gained, gained precipitate is dried 8 h at 70 DEG C and obtains faint yellow powder body；
Faint yellow powder body is calcined 4h at 600 DEG C, naturally cools to room temperature and i.e. obtain the CeO that particle diameter is 326nm2/TiO2Nanometer
Composite hollow sphere catalyst.
Embodiment 5
A kind of CeO2-TiO2Nano combined hollow ball catalyst, first with polystyrene as template, with butyl titanate
It is wall material raw material with six nitric hydrate ceriums, is combined by sol-gel process and the sedimentation method and prepare CeO2/TiO2Cladding polyphenyl second
The complex microsphere of alkene, then calcining obtains CeO2/TiO2Nano combined hollow ball catalyst；
Wherein polystyrene, butyl titanate and the consumption of six nitric hydrate ceriums, by polystyrene: butyl titanate: six
Nitric hydrate cerium is 0.2g:1 × 10-3mol:1×10-3mol。
Above-mentioned CeO2/TiO2The preparation method of nano combined hollow ball catalyst, specifically includes following steps:
(1), by 0.2g polystyrene, 1g deionized water, 40 μ L strong aqua ammonia and 20mL dehydrated alcohol mix homogeneously, temperature is controlled
Degree is 60 DEG C, and rotating speed is, after 300r/min carries out reacting 2h, to obtain reactant liquor 1；
Described polystyrene spheres particle diameter is about 200nm；
(2), by 1 × 10-3Mol butyl titanate is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.05mol/L metatitanic acid four
N-butyl ethanol solution；
It is that 0.05mol/L tetra-n-butyl titanate ethanol solution adds in step (1) gained reactant liquor 1 in 1h by concentration,
Control temperature be 60 DEG C, rotating speed carry out when being 300r/min reacting 4h, obtain reactant liquor 2；
(3), by 1 × 10-3Mol six nitric hydrate cerium is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.05mol/L nitric acid
Cerium ethanol solution；
It is that 0.05mol/L cerous nitrate ethanol solution adds in step (2) gained solution 2 in 1h by concentration, controls temperature
Be 60 DEG C, rotating speed carry out when being 300r/min reacting 2h, obtain reactant liquor 3；
By reactant liquor 3 centrifugation of gained, gained precipitate is dried 9h at 60 DEG C and obtains faint yellow powder body；
Faint yellow powder body is calcined 3h at 500 DEG C, naturally cools to room temperature and i.e. obtain the CeO that particle diameter is 220nm2/TiO2Nanometer
Composite hollow sphere catalyst.
Use the transmission electron microscope instrument (Hitachi H-600, high and new technology company of the Hitachi) CeO to above-mentioned gained2/TiO2
Nano combined hollow ball is tested, and the TEM of gained figure is as it is shown in figure 1, as can be seen from Figure 1 CeO2/TiO2Nano combined sky
Bulbus cordis particle diameter is 220nm.
Use the scanning electron microscope instrument (Hitachi S-3400N, high and new technology company of the Hitachi) CeO to above-mentioned gained2/
TiO2Nano combined hollow ball is tested, and the SEM of gained figure is as in figure 2 it is shown, products therefrom the most of the present invention
Be hollow ball structure, i.e. the CeO of its structure and prior art2-TiO2The structure of composite oxides is different.
Application Example 1
Taking 25mL concentration is that 20mg/L rhodamine B solution is placed in 50ml quartz socket tube, adds 20mg in quartz socket tube
The CeO of embodiment 5 gained2/TiO2Composite hollow sphere catalyst, uses SB-5200 ultrasonic washing unit, the ultrasonic 5min of 300W.
Separately taking 25mL concentration is that 20mg/L rhodamine B solution is placed in 50ml quartz socket tube, is added without CeO2/TiO2Compound
Hollow ball, does blank experiment.
Separately taking 25mL concentration is that 20mg/L rhodamine B solution is placed in 50ml quartz socket tube, adds the CeO of prior art2-
TiO2Composite oxides, do control experiment.
Quartz socket tube is placed in BL-GHX photochemical reaction instrument, after dark adsorbs 30min, samples 5ml.Adsorb complete
After, under 600W ultraviolet source, light degradation reaction 60min, every 10min sample 5ml.
Take the supernatant after taken sample 10000r/min is centrifuged 5min, use UV-2100 ultraviolet spectrophotometer to survey
Examination absorbance.CeO2/TiO2Nano combined hollow ball catalyst and the CeO of prior art2-TiO2The photocatalysis of composite oxides
Activity as it is shown on figure 3, in Fig. 3 composite hollow ball be CeO2/TiO2Nano combined hollow ball catalyst, literary composition according to composite granule
Offer (Chiara G, et al. Structural and spectroscopic characterization of CeO2–TiO2
Mixed oxides [J]. Journal of Materials Chemistry A, 2013,1,10918-10926) it is prepared
The CeO of prior art2-TiO2Composite oxides.As can be seen from Figure 3 the CeO that prepared by the present invention2/TiO2Nano combined sky
Bulbus cordis has the ability of stronger light degradation rhodamine B.
In sum, a kind of CeO of the present invention2/TiO2Nano combined hollow ball catalyst uniform particle sizes, mean diameter is
216nm-580nm, cavity is obvious, under 600W ultraviolet source in 60min, the CeO of the present invention2/TiO2Nano combined hollow ball is urged
Agent is 30% to the disposal efficiency of 20mg/L rhodamine B solution, and the CeO of prior art2-TiO2Composite oxides pair
The disposal efficiency of 20mg/L rhodamine B solution is 20%, i.e. a kind of CeO of the present invention2/TiO2Composite hollow sphere catalyst, by
It is hollow-core construction in it, compares CeO2-TiO2The solid construction of composite oxides improves 10% to the degradation capability of rhodamine B.
Above said content is only the basic explanation under present inventive concept, and according to appointing that technical scheme is made
What equivalent transformation, all should belong to protection scope of the present invention.
Claims (2)
1. a CeO2/TiO2Nano combined hollow ball catalyst, it is characterised in that described CeO2/TiO2Nano combined hollow ball
Catalyst, first with polystyrene as template, with butyl titanate and six nitric hydrate ceriums for wall material raw material, by colloidal sol-solidifying
Glue method and the sedimentation method combine and prepare CeO2/TiO2The complex microsphere of cladding polystyrene, then controls temperature and is 500-800 DEG C
Calcining 3-5h obtains CeO2/TiO2Nano combined hollow ball catalyst；
Wherein polystyrene, butyl titanate and the consumption of six nitric hydrate ceriums, by polystyrene: butyl titanate: six hydrations
Cerous nitrate is 0.1-0.3g:0.2-8 × 10-3mol:1-6×10-3Mol, described polystyrene particle diameter is 200-500nm；
Described CeO2/TiO2Nano combined hollow ball catalyst is prepared from especially by the method comprised the steps:
(1), by 0.1-0.3g polystyrene, 0.5-2g deionized water, 10-50 μ L strong aqua ammonia and 20mL dehydrated alcohol mix homogeneously
After, control temperature and be 60-75 DEG C, after rotating speed 300-500r/min carries out reacting 2-4h, obtain reactant liquor 1；
(2), by 0.2-8 × 10-3Mol butyl titanate is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.01-0.40mol/L
Butyl titanate ethanol solution；
It is that 0.01-0.40mol/L butyl titanate ethanol solution adds step (1) gained reactant liquor 1 in 0.5-1h by concentration
In, control temperature be 60-75 DEG C, rotating speed be that 300-500r/min carries out reacting 2-4h, obtain reactant liquor 2；
(3), by 1-6 × 10-3Mol six nitric hydrate cerium is dissolved in 20mL dehydrated alcohol, and being configured to concentration is 0.05-0.3mol/L nitre
Acid cerium ethanol solution；
It is that 0.05-0.3mol/L cerous nitrate ethanol solution adds in step (2) gained reactant liquor 2 in 0.5-1h by concentration, control
Temperature processed is 60-75 DEG C, rotating speed is that 300-500r/min carries out reacting 2-4h, obtains reactant liquor 3；
By reactant liquor 3 centrifugation of gained, gained precipitate is dried 8-10 h at 60-80 DEG C and obtains faint yellow powder body；
Faint yellow powder body is calcined 3-5h at 500-800 DEG C, naturally cools to room temperature and i.e. obtain CeO2/TiO2Nano combined hollow ball
Catalyst.
2. CeO as claimed in claim 12/TiO2Nano combined hollow ball catalyst, it is characterised in that its particle diameter is 216nm-
580nm。
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| CN105869897B (en) * | 2016-06-29 | 2017-12-08 | 扬州大学 | A kind of hollow material CeO2@TiO2Preparation method and applications |
| CN107159182A (en) * | 2017-05-31 | 2017-09-15 | 中盐金坛盐化有限责任公司 | A kind of preparation method of hollow microsphere SCR denitration |
| CN112295515B (en) * | 2020-11-30 | 2022-03-25 | 江南大学 | Preparation method of zinc oxide/cerium oxide hollow microspheres with inverted blueberry-shaped structures |
| CN116747154B (en) * | 2023-08-15 | 2023-10-17 | 广东碧茜生物科技有限公司 | Cerium oxide-based sun-screening material capable of resisting blue light and preparation method thereof |
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