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Ti<3+>-self-doped anatase titanium-oxide photocatalyst with large specific surface area, and synthetic method and applications thereof

A technology with large specific surface area and photocatalyst, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low total efficiency of converting light energy into hydrogen energy, It is not conducive to the separation of photogenerated electrons and holes, affecting the photon quantum efficiency, etc., to achieve the effect of improving the photocatalytic hydrogen production quantum efficiency, easy structure control, and high product purity.

Inactive Publication Date: 2013-09-11
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, ordinary TiO 2 In the process of photocatalytic hydrogen production, the photogenerated electron-hole pairs are easily recombined during the process of migrating from the inside of the catalyst to the surface, and the reverse reaction of photocatalytic hydrogen production is prone to occur, which leads to the total conversion of light energy into hydrogen energy. The efficiency is very low, therefore, the design and synthesis of new and efficient TiO 2 Photocatalyst is the key to improve the efficiency of photocatalytic hydrogen production
In recent years, there have been a lot of improvements in nano-TiO at home and abroad. 2 A new method of photocatalytic hydrogen production. However, nano-titanium oxide with high crystallinity usually has a relatively small specific surface area, fewer active sites, and a smaller light-absorbing area, which is not conducive to the separation of photogenerated electrons and holes. photon quantum efficiency

Method used

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  • Ti&lt;3+&gt;-self-doped anatase titanium-oxide photocatalyst with large specific surface area, and synthetic method and applications thereof
  • Ti&lt;3+&gt;-self-doped anatase titanium-oxide photocatalyst with large specific surface area, and synthetic method and applications thereof
  • Ti&lt;3+&gt;-self-doped anatase titanium-oxide photocatalyst with large specific surface area, and synthetic method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 8mL of water in a 50mL beaker, drop into 2.0mL (2.4mmol) of TiCl 3 , to obtain a mixed solution (0.24mol / L) with a total volume of 10mL, which was transferred to a microwave reactor after stirring evenly. The heating rate was 24°C / min, the maximum microwave power was 800W, the temperature was raised to 150°C and kept at this temperature for 0 min, cooled to room temperature, washed with water until neutral, centrifuged and vacuum-dried to obtain sample A.

[0022] Weigh 50 mg of sample A into a beaker, add 60 mL of water, 20 mL of methanol and 128 μL (0.02 mol / L) of chloroplatinic acid solution, stir and disperse evenly. Place it under a 300W xenon lamp for 30-40min. Wash three times with water and alcohol respectively, and dry in vacuum at 80-90°C for 4h.

Embodiment 2

[0024] Take 8.5mL of water in a 50mL beaker, drop into 1.5mL (1.8mmol) of TiCl 3 , to obtain a mixed solution (0.18mol / L) with a total volume of 10mL, which was transferred to a microwave reactor after stirring evenly. The heating rate is 24°C / min, the maximum microwave power is 800W, the temperature is raised to 150°C and kept at this temperature for 0 min, cooled to room temperature, washed with water until neutral, centrifuged and vacuum-dried to obtain sample A.

[0025] Weigh 50 mg of sample A into a beaker, add 60 mL of water, 20 mL of methanol and 128 μL (0.02 mol / L) of chloroplatinic acid solution, stir and disperse evenly. Placed under a 300W xenon lamp for 30min. Wash three times with water and alcohol respectively, and dry in vacuum at 80°C for 4h.

Embodiment 3

[0027] Take 9.0mL of water in a 50mL beaker, drop into 1.0mL (1.2mmol) of TiCl 3 , to obtain a mixed solution (0.12mol / L) with a total volume of 10mL, which was transferred to a microwave reactor after stirring evenly. The heating rate was 24°C / min, the maximum microwave power was 800W, the temperature was raised to 150°C and kept at this temperature for 0 min, cooled to room temperature, washed with water until neutral, centrifuged and vacuum-dried to obtain sample A.

[0028] Weigh 50 mg of sample A into a beaker, add 60 mL of water, 20 mL of methanol and 128 μL (0.02 mol / L) of chloroplatinic acid solution, stir and disperse evenly. Placed under a 300W xenon lamp for 30min. Wash three times with water and alcohol respectively, and dry in vacuum at 80°C for 4h.

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Abstract

The invention discloses a Ti<3+>-self-doped anatase titanium-oxide photocatalyst with a large specific surface area, and a synthetic method and applications thereof. A microwave-assisted one-step method is used to prepare large specific-surface-area porous anatase TiO2. The catalyst is simple, fast and energy-saving in preparation method, and has environmental pollution in preparation process which meets green synthesis requirement. The prepared TiO2 has a Ti<3+>-self-doped porous structure which is beneficial for separation of a photo electron and a hole in a photocatalytic reaction process, and finally helps to improve quantum efficiency of the material in hydrogen production. The catalyst also is widely applicable to the field of antibiosis, photocatalytic degradation of a pollutant, lithium battery and the like.

Description

technical field [0001] The invention relates to the field of photocatalyst synthesis, in particular to a large specific surface area Ti 3+ Doped porous anatase titanium oxide photocatalyst and its synthesis method and application. Background technique [0002] Environmental and energy issues have become the main issues affecting people's lives and endangering human existence. This problem compels mankind to develop clean and sustainable, renewable energy sources. Hydrogen is widely regarded as a future clean energy carrier in many applications, such as environmentally friendly vehicles, home heating and power plants. Hydrogen production by photocatalytic hydrolysis is the most promising way to realize the hydrogen economy effect because it utilizes the inexhaustible solar energy in nature as an energy source. However, finding an ideal photocatalyst that satisfies all the requirements for photocatalytic hydrogen production (chemical stability, corrosion resistance, visible...

Claims

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Application Information

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IPC IPC(8): B01J23/42C01B3/32
Inventor 张蝶青章姗姗温美成刘佩珏李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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