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Preparation method of platinum modified nano titanium dioxide

A technology of nano-titanium dioxide and titanium dioxide, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve problems such as poor absorption of visible light, achieve improved catalytic performance, and increase exposure The area, the effect of improving photocatalytic activity

Inactive Publication Date: 2018-04-13
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But TiO 2 It is a wide bandgap semiconductor (anatase TiO 2 E g =3.2eV), poor absorption of visible light

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Dissolve 10ml of butyl titanate in 25ml of absolute ethanol, and then add 2ml of glacial acetic acid to obtain a yellow transparent solution A.

[0021] (2) Dissolve 1 g of chloroplatinic acid in distilled water to prepare an orange-yellow chloroplatinic acid solution.

[0022] (3) After mixing and stirring 12.5ml of absolute ethanol and chloroplatinic acid solution for 0.5h, an orange-yellow transparent solution B was obtained.

[0023] (4) Solution B was slowly added to solution A, stirred for 1 h, and orange-yellow transparent solution C was obtained. Let it stand at room temperature for 3 hours, and then put it into an oven to dry after it forms a gel.

[0024] (5) Put the dried sample into a resistance box, calcined at 400° C. for 1 hour, washed with water, and dried to obtain platinum-modified titanium dioxide.

[0025] In step 2, the amount of distilled water used was 37.5 mL, and the prepared chloroplatinic acid solution was ready for use immediately, and ...

Embodiment 2

[0029] (1) Dissolve 10ml of butyl titanate in 20ml of absolute ethanol, and then add 2ml of glacial acetic acid to obtain a yellow transparent solution A.

[0030] (2) Dissolve 1 g of chloroplatinic acid in distilled water to prepare an orange-yellow chloroplatinic acid solution.

[0031] (3) After mixing and stirring 12.5ml of absolute ethanol and chloroplatinic acid solution for 0.5h, a yellow transparent solution B was obtained.

[0032] (4) Solution B was slowly added to solution A, stirred for 1 h, and yellow transparent solution C was obtained. Let it stand at room temperature for 6 hours, and put it into an oven to dry after it forms a gel.

[0033] (5) Put the dried sample into a resistance box, calcined at 400° C. for 1 hour, washed with water, and dried to obtain platinum-modified titanium dioxide.

[0034] In step 2, the amount of distilled water used was 100 mL, and the prepared chloroplatinic acid solution was ready for use immediately, and stored in a refrigera...

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Abstract

The invention provides a preparation method of platinum modified nano titanium dioxide. By the preparation method, a property amount of precious metal Pt is deposited on the surface of TiO2, so that an electronic band structure changes, charge carriers are distributed again, and thus solar energy can be directly used for decomposing organic pollutants in gas phase and liquid phase into harmless micromolecules. Pt is loaded on TiO2 in a dispersed manner, on one hand, the area of a part, which is in contact with a reactant, of a catalyst can be increased, the reactant and Pt are interacted strongly, then the electron promotion effect of TiO2 is fully played, and the catalysis of the catalyst is improved; and on the other hand, a Schottky potential barrier can further be formed on the surfaceof TiO2, thus, the Schottky potential barrier becomes a photo-induced electron capturing center, separation of photo-induced charge carriers on the surface of a photocatalyst is promoted, and then the photocatalytic activity is improved.

Description

technical field [0001] The invention relates to a method for preparing platinum-modified nano-titanium dioxide, which belongs to the technical field of nano-metal material preparation and modification. Background technique [0002] TiO 2 As an n-type semiconductor photocatalyst, it has good optical and electrical properties, and is widely used in environmental governance, solar photovoltaic cells, gas sensors, photolysis of water to produce hydrogen and oxygen, etc. Nano TiO 2 Photocatalytic degradation of organic matter can not only destroy the aromatic groups in the dye molecules to achieve the purpose of complete degradation, but also effectively destroy the chromophoric groups in the dyes. But TiO 2 It is a wide bandgap semiconductor (anatase TiO 2 E g =3.2eV), the absorption of visible light is poor. [0003] Studies have shown that TiO 2 There is a strong interaction between the support and the noble metal, and noble metal catalysts such as Pt, Ag, Ir, Au, Ru an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42
CPCB01J23/42B01J35/39
Inventor 张骥陈瑶高建民王明杰刘付
Owner BEIJING FORESTRY UNIVERSITY
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