Preparation method and application of TiO2/g-C3N4 photoanode nanocomposite

A nano-composite material, g-c3n4 technology, applied in the field of photoelectrochemistry, can solve the problems of complex operation process, difficult to prepare large-scale, etc., and achieve the effects of simple operation, good optical properties, and improved transmission efficiency

Inactive Publication Date: 2019-04-16
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some studies have used composite TiO 2 / g -C 3 N 4 The method of semiconductor materials, but the operation process is relatively complicated, and it is not easy to carry out large-scale preparation

Method used

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  • Preparation method and application of TiO2/g-C3N4 photoanode nanocomposite
  • Preparation method and application of TiO2/g-C3N4 photoanode nanocomposite
  • Preparation method and application of TiO2/g-C3N4 photoanode nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: TiO 2 / g -C 3 N 4 Photoanode nanocomposites

[0030] Preparation:

[0031] Mix 0.45g of melamine and 2ml of tetrabutyl titanate in 40ml of ethanol, stir to disperse the mixture evenly, put it into a 100ml hydrothermal kettle, the temperature of the hydrothermal is 180°C, and the time is 24h. After the hydrothermal is completed, centrifuge Filter, put the powder into a muffle furnace for annealing at 550°C for 4 hours, cool to room temperature, and grind to obtain TiO 2 / g -C 3 N 4 Photoanode nanocomposites.

[0032] Will get TiO 2 / g -C 3 N 4 Powder carries out XRD test, the result is as follows figure 1 shown by figure 1 Visible, TiO 2 / g -C 3 N 4 Has good crystallinity.

Embodiment 2

[0033] Example 2: TiO 2 / g -C 3 N 4 Photoelectrode thin film (TiO 2 / g -C 3 N 4 -1min)

[0034] Preparation:

[0035] 1) Take 10mg I 2 Place in 25ml of acetone aqueous solution (the volume ratio of water and acetone is 1:25), seal and sonicate for 30min until the solution is evenly dispersed, and the mixture containing I 2 of acetone solution.

[0036] 2) get the TiO prepared by 0.6g embodiment 1 2 / g -C 3 N 4 Powder dispersed in containing I 2 In the acetone aqueous solution, sealed and sonicated for 120min, the electrophoretic deposition suspension was obtained.

[0037] 3) Place two pieces of conductive glass facing each other and immerse them in the electrophoretic deposition suspension parallel to each other, and apply a DC voltage of 25V between the two electrodes, and deposit for 1 min.

[0038] 4) Cut off the current, take the conductive glass (FTO) out of the suspension, dry it at room temperature, and bake it in a muffle furnace at 450°C for 90min to obt...

Embodiment 3

[0039] Example 3: TiO 2 / g -C 3 N 4 Photoelectrode thin film (TiO 2 / g -C 3 N 4 -3min)

[0040] The preparation method is the same as in Example 2, only changing the deposition time of step 3) to be 3min to obtain TiO 2 / g -C 3 N 4 Photoelectrode film, marked as TiO 2 / g -C 3 N 4 -3min.

[0041] TiO 2 / g -C 3 N 4 -3min sample for SEM test, the result is as follows figure 2 As shown, in the figure it can be observed that TiO 2 and g-C 3 N 4 shape.

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Abstract

The invention relates to the field of photoelectrochemistry, and discloses a TiO2 / g-C3N4 photoanode nanocomposite. The preparation method includes the following steps that melamine and tetrabutyl titanate are mixed in ethanol, stirring is performed to make the mixture evenly dispersed, a hydrothermal method is adopted, centrifugal filtration is performed, and after drying, powder is annealed at high temperature, cooled to room temperature and ground to obtain the TiO2 / g-C3N4 photoanode nanocomposite. The invention further provides the application of the photoanode nanocomposite in preparationof a TiO2 / g-C3N4 photo-electrode film. The TiO2 / g-C3N4 photoanode nanocomposite and the photo-electrode film have good photochemical properties, and the preparation method has the advantages that theenergy consumption is low, the conditions are simple and large-scale preparation is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of photoelectrochemistry, in particular to a TiO 2 / g -C 3 N 4 Preparation methods and applications of photoanode nanocomposites. Background technique [0002] Photoelectrochemical (PEC) water splitting technology is currently a very active research field. It uses sunlight to split water to produce hydrogen to obtain renewable energy, which is currently the main means to solve environmental and energy problems. The development of photoanode materials is the top priority for large-scale applications of photoelectrochemical water splitting. Semiconductor materials with effective carrier transport, suitable band gap, conduction band valence band energy levels, good stability and low cost are considered as ideal photoanode semiconductor materials. In order to obtain photoelectrode materials that meet the above conditions, it is imperative to improve the performance of existing semiconductor materials and dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01B21/082B82Y30/00C25B1/04C25B11/04C25D13/02
CPCB82Y30/00C01B21/0605C01G23/053C25B1/04C25D13/02C25B1/55C25B11/091Y02E60/36
Inventor 范晓星王晓娜蔡鹤成祥祥刘京韩宇王绩伟
Owner LIAONING UNIVERSITY
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