A method for preparing an efficient electron-transfer Cu-modified C/TiO2 photocatalytic reduction material

An electron transfer and photocatalysis technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of low catalytic efficiency, improve photocatalytic performance, realize noble metal substitution, and efficient utilization Effect

Inactive Publication Date: 2017-12-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition metals and non-metals have improved the photocatalytic efficiency to a certain extent, but the overall catalytic efficiency is still not high, and additional precursors are required during the doping process (such as carbon sources in carbon doping, glucose, etc.)

Method used

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  • A method for preparing an efficient electron-transfer Cu-modified C/TiO2 photocatalytic reduction material
  • A method for preparing an efficient electron-transfer Cu-modified C/TiO2 photocatalytic reduction material
  • A method for preparing an efficient electron-transfer Cu-modified C/TiO2 photocatalytic reduction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of C / TiO by sol-gel method 2

[0035] Take 1 mL of deionized water and add it to 25 mL of tetrabutyl titanate to form a sol-gel, stir it magnetically at room temperature for 4 hours, filter and put it in an oven to dry. Grind and dry the filter cake, put it into a muffle furnace for calcination at 400°C for 2 hours, and obtain C / TiO after cooling 2 catalyst;

[0036] After testing, the prepared C-doped TiO 2 The carbon content is 1.1%.

[0037] (2) Preparation of CuO by photoreduction deposition method x -C / TiO 2

[0038] Get the C / TiO prepared in 0.6g step (1) 2 Catalyst and 3.7mL 0.01mol / L CuCl 2The solution was mixed and ultrasonicated for 10 minutes, 5 mL of glycerol was added, and deionized water was added to make the total volume of the mixed solution 100 mL, and the solution was illuminated by a xenon lamp for 2 hours (the power of the xenon lamp was 300 W, and the wavelength range of its emission spectrum was 350-780 nm). Before light ir...

Embodiment 2

[0041] (1) Preparation of C / TiO by sol-gel method 2

[0042] Take 3 mL of deionized water and add it to 25 mL of tetrabutyl titanate to form a sol-gel, stir it magnetically at room temperature for 8 hours, filter and put the filter cake in an oven to dry. Grind and dry the filter cake, put it into a muffle furnace for calcination at 400°C for 2 hours, and obtain C / TiO after cooling 2 catalyst;

[0043] After testing, the prepared C-doped TiO 2 The carbon content is 3.5%.

[0044] (2) Preparation of CuO by photoreduction deposition method x -C / TiO 2

[0045] Get the C / TiO prepared in 0.6g step (1) 2 Catalyst and 7.2mL 0.01mol / L Cu(NO 3 ) 2 The solution was mixed and ultrasonicated for 10 minutes, 5 mL of glycerol was added, and deionized water was added to make the total volume of the mixed solution 100 mL, and the solution was illuminated by a xenon lamp for 2 hours (the power of the xenon lamp was 300 W, and the wavelength range of its emission spectrum was 350-780 n...

Embodiment 3

[0048] (1) Preparation of C / TiO by sol-gel method 2

[0049] Take 5 mL of deionized water and add it to 25 mL of tetrabutyl titanate to form a sol-gel, stir it magnetically at room temperature for 12 hours, filter and put the filter cake in an oven to dry. Grind and dry the filter cake, put it into a muffle furnace for calcination at 400°C for 2 hours, and obtain C / TiO after cooling 2 catalyst;

[0050] After testing, the prepared C-doped TiO 2 The carbon content is 4.6%.

[0051] (2) Preparation of CuO by photoreduction deposition method x -C / TiO 2

[0052] Get the C / TiO prepared in 0.6g step (1) 2 Catalyst and 14.3mL 0.01mol / L CuSO 4 The solution was mixed and ultrasonicated for 10 minutes, 5 mL of glycerol was added, and deionized water was added to make the total volume of the mixed solution 100 mL, and the solution was illuminated by a xenon lamp for 2 hours (the power of the xenon lamp was 300 W, and the wavelength range of its emission spectrum was 350-780 nm). ...

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Abstract

The invention relates to the field of material preparation and is aimed at providing a method for preparing an efficient electron-transfer Cu-modified C / TiO2 photocatalytic reduction material. Tetrabutyl titanate is adopted as a titanium source in the method. The method includes preparing a C-doped TiO2 catalyst through a sol-gel process; and then preparing a Cu-loaded TiO2 photocatalyst by utilizing a photo-reduction deposition process, thus forming a C / Cu structure on the surface of the catalyst, enhancing interface electron transfer effects of the Cu element and further improving photocatalytic performance. Visible light absorption of the catalyst is enhanced and photogenerated charge transfer is accelerated, thus achieving efficient utilization of photo-generated electrons. The method overcomes disadvantages that present intrinsic semiconductors or semiconductors doped with a single element have small visible light response and that photogenerated charges are liable to be compounded. The C-doped TiO2 is prepared under a condition of not adding an extra carbon source, the surface of the catalyst is loaded with a transition metal element in place of precious metals, and therefore the cost is low and the method is simple and easily repeated. The dechlorination efficiency of the prepared catalyst is greatly increased, and efficient dechlorination is achieved under the premise of no use of precious metals.

Description

technical field [0001] The invention is a highly efficient electron transfer Cu-modified C / TiO with visible light response 2 The invention discloses a method for preparing a photocatalytic reduction material, belonging to the field of material preparation. Background technique [0002] Semiconductor photocatalysis technology uses the strong redox ability electron-hole pairs generated by semiconductors under the excitation of light sources to effectively degrade mineralized pollutants and reduce CO under mild conditions. 2 As well as decomposing water to produce hydrogen, etc., it is widely used in the fields of energy and environment. Among them, the photocatalytic reduction technology utilizes the strong reducibility of photogenerated electrons to effectively remove the toxic components in organic pollutants into inorganic substances, avoiding the occurrence of more toxic intermediate products in the oxidation process. It has great advantages in degradation. [0003] Cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72
CPCB01J23/72B01J23/002B01J35/004
Inventor 赵伟荣张萌孙润泽
Owner ZHEJIANG UNIV
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