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Preparation method of platinum doped ZnO-SnO2 composite photocatalytic material

A composite photocatalysis, zno-sno2 technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problem of insufficient photocatalytic degradation and photocatalytic activity. Limitation and other issues, to achieve the effect of increasing the number of active sites, good preparation effect, and short time-consuming

Active Publication Date: 2019-07-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to its wide bandgap width, tin dioxide often fails to meet the requirements of photocatalytic degradation of pollutants, and the composite of zinc oxide and tin dioxide, covered by zinc oxide nanoparticles on the tin dioxide flake structure, can The specific surface area is greatly enhanced, and the heterojunction formed between them can enhance the photocatalytic activity, but its photocatalytic activity still has certain limitations.

Method used

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  • Preparation method of platinum doped ZnO-SnO2 composite photocatalytic material
  • Preparation method of platinum doped ZnO-SnO2 composite photocatalytic material
  • Preparation method of platinum doped ZnO-SnO2 composite photocatalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A ZnO-SnO doped with metallic platinum 2 The preparation method of the composite photocatalytic material, the specific steps are as follows:

[0028] (1) Add 2g of tin tetrachloride pentahydrate, 1.0g of sodium hydroxide, 0.2mL of 2mmol / L chloroplatinic acid solution, and 1.0g of polyvinylpyrrolidone (PVP) into 30mL of deionized water and stir for 15min to obtain a solution A, the stirring speed is 500 rpm;

[0029] (2) Add 30 mL of ethanol to solution A in step (1), stir for 20 min to obtain solution B, and the stirring speed is 500 rpm;

[0030] (3) Add 6 g of zinc sulfate to 30 mL of deionized water, stir for 15 minutes to obtain solution C, and the stirring speed is 500 rpm;

[0031] (4) Add 4g of ammonium bicarbonate to 20mL of deionized water, stir for 15min to obtain solution D, add solution D to solution C of step (3), stir for 35min under 60℃ water bath conditions to form solution E, stirring speed 500 revolutions per minute;

[0032] (5) Add the solution E of step (4)...

Embodiment 2

[0036] A ZnO-SnO doped with metallic platinum 2 The preparation method of the composite photocatalytic material, the specific steps are as follows:

[0037] (1) Add 1.5g of tin tetrachloride pentahydrate, 2.0g of sodium hydroxide, 0.1mL of 2mmol / L chloroplatinic acid solution, 1.5g of polyvinylpyrrolidone (PVP) into 40mL of deionized water and stir for 20min to obtain Solution A, the stirring speed is 750 rpm;

[0038] (2) Add 40 mL of ethanol to solution A in step (1), stir for 30 min to obtain solution B, and the stirring speed is 750 rpm;

[0039] (3) Add 4 g of zinc sulfate to 40 mL of deionized water, stir for 20 minutes to obtain solution C, and the stirring speed is 750 rpm;

[0040] (4) Add 6g of ammonium bicarbonate to 40mL of deionized water, stir for 20min to obtain solution D, add solution D to solution C of step (3), stir for 20min under 40℃ water bath conditions to form solution E, stirring speed 750 revolutions per minute;

[0041] (5) Add the solution E of step (4) to ...

Embodiment 3

[0044] A ZnO-SnO doped with metallic platinum 2 The preparation method of the composite photocatalytic material, the specific steps are as follows:

[0045] (1) Add 2.5g tin tetrachloride pentahydrate, 1.5g sodium hydroxide, 0.4mL 2mmol / L chloroplatinic acid solution, 0.5g polyvinylpyrrolidone (PVP) into 20mL deionized water and stir for 10min to obtain Solution A, the stirring speed is 1000 rpm;

[0046] (2) Add 20 mL of ethanol to solution A in step (1), stir for 40 minutes to obtain solution B, and the stirring speed is 1000 rpm;

[0047] (3) Add 8g of zinc sulfate to 20mL of deionized water, stir for 10min to obtain solution C, the stirring speed is 1000 rpm;

[0048] (4) Add 5g of ammonium bicarbonate to 30mL of deionized water, stir for 10min to obtain solution D, add solution D to solution C of step (3), stir for 50min under 50℃ water bath conditions to form solution E, the stirring speed is 1000 revolutions per minute;

[0049] (5) Add the solution E of step (4) to the solutio...

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Abstract

The invention discloses a preparation method of a platinum doped ZnO-SnO2 composite photocatalytic material. The preparation method comprises following steps: adding tin tetrachloride pentahydrate, sodium hydroxide, a chloroplatinic acid solution, and polyvinylpyrrolidone into deionized water, then adding ethanol, mixing a zinc sulfate solution and a ammonium bicarbonate solution to prepare a precursor solution, carrying out hydrothermal reactions under a microwave condition, naturally cooling the reaction product, washing, and drying to obtain a platinum doped ZnO-SnO2 composite photocatalytic material (A), and then burning (A) to obtain a platinum doped ZnO-SnO2 composite photocatalytic material (B). The hydrothermal reactions are assisted by microwaves to synthesize the composite photocatalytic material; and a sample is directly heated by microwaves from inner to outer. Compared with a conventional hydrothermal method or a sol-gel method, the provided preparation method has the advantages that the time is short, the heat transfer efficiency is high, the reaction speed is greatly increased under high pressure and high temperature reactions, and the preparation effect is good.

Description

Technical field [0001] The invention specifically relates to a ZnO-SnO doped with metallic platinum 2 A preparation method of a composite photocatalytic material. The catalyst is a composite and can be used as a catalytic material in the field of photocatalytic materials. Background technique [0002] With the rapid development of the times, the negative impact of industrial production is gradually increasing. Economic development has caused more and more serious environmental pollution problems. Photocatalytic technology is a green technology based on environmental protection issues and sustainable development strategies. The nanomaterials prepared by it are important in degrading organic pollutants in wastewater. Significance. However, many photocatalysts are often not very effective in photocatalytic degradation of pollutants due to their large forbidden band width. Therefore, the development of photocatalysts with smaller band gaps and lower electron-hole recombination ratio...

Claims

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Application Information

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IPC IPC(8): B01J23/62B01J37/34B01J37/10C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J23/626B01J23/002B01J37/346B01J37/10C02F1/30C02F2305/10C02F2101/308C02F2101/34C02F2101/36C02F2101/38B01J35/393B01J35/23B01J35/39
Inventor 王学谦何源许磊夏仡罗铜叶潇刚瑞奇
Owner KUNMING UNIV OF SCI & TECH
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