ZnSn (OH)6 nanometer cubic particle/graphene sandwich structure compound light catalyst

A nano-cubic and ene sandwich technology, applied in the field of photocatalysis, can solve the problems of difficult to control product morphology, troublesome post-processing, low product purity, etc., and achieve excellent photocatalytic effect, low production cost, and easy separation and recovery. Effect

Inactive Publication Date: 2014-02-26
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Precipitation method (CN1304880A, CN102515259A, CN1907862A): This method has relatively mild conditions, less investment, and large production capacity, but the product has low purity and large size, and this method is difficult to control the shape of the product;
[0007] Microemulsion method (CN103274450A): This method has mild conditions, simple equipment, and can better control the size and shape of the product, but in the reaction process, a large amount of surfactants and organic solvents need to be used, and the post-treatment is troublesome and unfavorable to the environment.

Method used

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  • ZnSn (OH)6 nanometer cubic particle/graphene sandwich structure compound light catalyst
  • ZnSn (OH)6 nanometer cubic particle/graphene sandwich structure compound light catalyst
  • ZnSn (OH)6 nanometer cubic particle/graphene sandwich structure compound light catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] preparation:

[0040] Step 1: Preparation of ZnSn(OH) 6 Nano Cubic Particles:

[0041] (1) Preparation of reaction precursor solution: Dissolve 2 mmol of zinc acetate dihydrate in 80 mL of deionized water at room temperature, then add an equimolar amount of potassium stannate to the above-mentioned zinc acetate solution, and stir evenly to form a reaction precursor solution;

[0042] (2) Hydrothermal reaction: Transfer the obtained precursor solution to a 100mL polytetrafluoroethylene reactor, raise the temperature to 180°C, and keep it warm for 18h;

[0043] (3) Washing and collection of precipitates: the obtained product is naturally cooled to room temperature, washed three times with hydrochloric acid with pH = 2.5, deionized water, and absolute ethanol, centrifuged to collect the precipitate, and vacuum-dried at 60°C to obtain ZnSn(OH) 6 Nanocubic particles.

[0044] The second step: prepare graphene oxide colloidal solution:

[0045] Using natural graphite powd...

Embodiment 2

[0053] Step 1: Preparation of ZnSn(OH) 6 Nano Cubic Particles:

[0054] (1) Preparation of reaction precursor solution: Dissolve 2 mmol of zinc acetate dihydrate in 80 mL of deionized water at room temperature, then add an equimolar amount of potassium stannate to the above-mentioned zinc acetate solution, and stir evenly to form a reaction precursor solution;

[0055] (2) Hydrothermal reaction: Transfer the obtained precursor solution to a 100mL polytetrafluoroethylene reactor, raise the temperature to 180°C, and keep it warm for 18h;

[0056] (3) Washing and collection of precipitates: the obtained product is naturally cooled to room temperature, washed three times with hydrochloric acid with pH = 2.5, deionized water, and absolute ethanol, centrifuged to collect the precipitate, and vacuum-dried at 60°C to obtain ZnSn(OH) 6 Nanocubic particles.

[0057] The second step: prepare graphene oxide colloidal solution:

[0058] Using natural graphite powder as raw material, gra...

Embodiment 3

[0064] Step 1: Preparation of ZnSn(OH)6 nano-cubic particles:

[0065] (1) Preparation of reaction precursor solution: Dissolve 2 mmol of zinc acetate dihydrate in 80 mL of deionized water at room temperature, then add an equimolar amount of potassium stannate to the above-mentioned zinc acetate solution, and stir evenly to form a reaction precursor solution;

[0066] (2) Hydrothermal reaction: transfer the obtained precursor solution into a polytetrafluoroethylene reactor with a capacity of 100 mL, raise the temperature to 180° C., and keep the temperature for 18 hours.

[0067] (3) Washing and collection of precipitates: the obtained product is naturally cooled to room temperature, washed three times with hydrochloric acid with pH = 2.5, deionized water, and absolute ethanol, centrifuged to collect the precipitate, and vacuum-dried at 60°C to obtain ZnSn(OH) 6 Nanocubic particles.

[0068] The second step: prepare graphene oxide colloidal solution:

[0069] Using natural g...

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Abstract

The invention discloses a ZnSn (OH)6 nanometer cubic particle / graphene sandwich structure compound light catalyst and a preparation method and application thereof. The ZnSn (OH)6 nanometer cubic particle / graphene sandwich structure compound material is prepared by compounding oxidized graphene and ZnSn (OH)6 nanometer cubic particles through auxiliary reduction of ultraviolet light. The preparation method of the ZnSn (OH)6 nanometer cubic particles is simple in process, convenient to operate, environment-friendly, efficient in synthesis and low in cost. The catalyst of the composite material is firmly bonded with the surface of graphene, separation of photon-generated carriers can be effectively improved and the recombination rate of carriers can be lowered to show a photocatalytic performance superior to nano particles. The photocatalytic activity of the compound light catalyst is 1.94 times of pure ZnSn (OH)6 and 1.74 times of commercial P25. The light catalyst is easy to separate from waste water and suitable for industrial production and application.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a ZnSn(OH) 6 Nano cubic particle / graphene sandwich structure composite photocatalyst and its preparation method and application. Background technique [0002] Zinc hydroxystannate is a multimetal hydroxide with functional perovskite structure. It is widely used as a flame retardant and smoke inhibitor for polymer materials such as plastics and rubber paints. Recent studies have shown that it has super photocatalytic activity and photostability. However, the rapid recombination of photogenerated electron-hole pairs is still an important factor affecting its photocatalytic activity. Therefore, effectively inhibiting the recombination of photogenerated carriers and promoting the effective separation of charges, thereby improving the photocatalytic activity of zinc hydroxystannate, has become a key way to improve the photocatalytic performance of zinc hydroxystannate. [0003] As a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14C02F1/32
Inventor 冯文辉刘平陈旬戴文新付贤智胡俊郑祖阳
Owner FUZHOU UNIV
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