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Composite titanium dioxide nanoflower photoelectrocatalysis material and preparation and application thereof

A titanium dioxide, photoelectric catalysis technology, applied in physical/chemical process catalysts, nanotechnology, nanotechnology and other directions, can solve the problems of complicated preparation methods and harsh reaction conditions, and achieve the effects of low cost, low equipment requirements, and mild preparation conditions

Active Publication Date: 2016-07-06
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these existing catalysts have the problems of complicated preparation methods, harsh reaction conditions, or catalyst performance that needs to be further improved.

Method used

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  • Composite titanium dioxide nanoflower photoelectrocatalysis material and preparation and application thereof
  • Composite titanium dioxide nanoflower photoelectrocatalysis material and preparation and application thereof
  • Composite titanium dioxide nanoflower photoelectrocatalysis material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] ① Concentrated hydrochloric acid and water were prepared at a ratio of 1:1 to make 50ml of hydrochloric acid solution. After stirring for 5 minutes, add 0.6ml of tetrabutyl titanate. After stirring for 10 minutes, pour it into the autoclave. Then put the FTO after ultrasonic cleaning with acetone / absolute ethanol / deionized water into the autoclave with the conductive surface facing upward at 45°.

[0060] ②Put the autoclave containing the reaction solution into an oven and continue heating at 170°C for 4 hours, and the obtained FTO loaded with white titanium dioxide is rinsed with absolute ethanol for use.

[0061] ③Prepare 0.1M silver nitrate solution and 0.15M sodium borohydride ethanol solution, soak the previously obtained electrode in the silver nitrate solution for 5 minutes, rinse with deionized water, blow dry with N2, and then put in sodium borohydride solution soak for 5 minutes, rinse with deionized water, and blow dry with N2. A titania nanoflower electrode...

Embodiment 2

[0074] In addition to putting the autoclave with the reaction solution into an oven as in step 2 of Example 1 and continuing to heat it for 3h / 5h / 7h respectively at 170°C, other methods were carried out as shown in Example 1, and the results were measured for 3h, The photocurrents of the electrodes obtained at 5h and 7h were 0.5, 0.85, and 0.4 times that of the composite electrode prepared in Example 1, respectively. The SEM pictures were basically the same as those in Example 1, and the hydrogen production was 0.6mL / h×cm 2 .

Embodiment 3

[0076] Except that the autoclave containing the reaction solution was put into an oven and heated at 150°C / 200°C for 4 hours respectively in step ② of Example 1, other methods were carried out as shown in Example 1, and the result was 150°C The photocurrent of the electrode prepared at 200°C and 200°C is 0.7 and 0.6 times that of the composite electrode prepared in Example 1, respectively, the SEM picture is basically the same as that in Example 1, and the hydrogen production is 0.7mL / h×cm 2 .

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Abstract

The invention relates to a composite titanium dioxide nanoflower photoelectrocatalysis material and preparation and application thereof.Preparation includes the following steps that 1, tetrabutyl titanate is added into a hydrochloric acid solution and mixed uniformly, then the mixed solution is moved into a high-pressure reactor, cleaned FTO conducting glass is soaked in reaction fluid in the high-pressure reactor with the conducting face facing upwards, and an FTO electrode with supported nanoflower-shaped titanium dioxide is obtained through heat treatment; 2, precious metal nanometer points are deposited on FTO through a continuous ion layer adsorption method to obtain a titanium dioxide nanoflower electrode with supported precious metal nanometer points; 3, the titanium dioxide nanoflower electrode with the supported precious metal nanometer points is soaked in an ammonia solution where cadmium sulfate and thiourea are dissolved, water-bath heating is conducted for 10-15 min with the supporting face facing upwards, and the product is taken out and calcined to obtain the titanium dioxide nanoflower photoelectrocatalysis material coated with a precious metal nanometer point cadmium sulfide film.The preparing method is simple, and the prepared catalysis material is good in performance and has higher hydrogen generation capacity when applied to hydrogen generation.

Description

technical field [0001] The invention belongs to the field of synthesis of photoelectric catalytic materials, and in particular relates to a titanium dioxide nanoflower photoelectric catalytic material coated with a silver nano-dot cadmium sulfide film, a preparation method and an application thereof. Background technique [0002] The energy problem is one of the serious problems that human beings are facing, and photocatalysis may become an important way to solve this problem, because most photocatalyst materials only absorb ultraviolet light, and ultraviolet light energy only accounts for 4% of natural light , Therefore, it is of great significance to develop photocatalysts with good response to visible light. [0003] For example, the Chinese invention patent application with publication number CN103736500A discloses a cadmium sulfide / titanium dioxide composite film and its application. The method adopts the inclined growth method to deposit titanium on the substrate to o...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J21/06B82Y30/00C25B11/08C25B1/02
CPCB01J21/063B01J27/04B82Y30/00C25B1/02C25B11/069C25B11/081
Inventor 张轶王强胡超陈书鑫丛燕青王齐
Owner ZHEJIANG GONGSHANG UNIVERSITY
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