Method for preparing sulfur auto-doped titanium dioxide photocatalyst

A technology of titanium dioxide and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of pollution, environmental protection, low and poor activity of sulfur-doped titanium dioxide photocatalysts, etc., to achieve Simplified preparation process, stable and efficient photocatalytic activity, simple preparation method

Inactive Publication Date: 2015-04-29
山西师范大学
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Problems solved by technology

[0004] In order to solve the problem that the preparation method of sulfur-doped titanium dioxide photocatalyst in the prior art is seriously polluted, the environmental protection is not good, and the activity of the prepared sulfur-doped titanium dioxide photocatalyst is low, and then provide a high activity, good environmental protection, pollution-free Preparation method of low sulfur self-doping titanium dioxide photocatalyst

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  • Method for preparing sulfur auto-doped titanium dioxide photocatalyst
  • Method for preparing sulfur auto-doped titanium dioxide photocatalyst
  • Method for preparing sulfur auto-doped titanium dioxide photocatalyst

Examples

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Embodiment 1

[0020] Weigh 0.1 g TiS 2 , it was slowly added to 18 grams of deionized aqueous solution, fully stirred and mixed evenly. Then the mixed solution was put into a 20ml high-pressure reaction kettle, sealed and placed in a muffle furnace, and reacted hydrothermally at 120° C. for 4 hours. After the reaction is finished, it is naturally cooled to room temperature, washed and separated, and then dried at a low temperature to obtain a light yellow sulfur self-doped titanium dioxide nanometer photocatalyst.

[0021] figure 1 It is the XRD figure of the sulfur-doped titanium dioxide photocatalyst that the present embodiment makes, and the dotted line in the figure corresponds to TiO 2 The main characteristic peak (101) diffraction peak, and pure TiS 2 and TiO 2 The comparison shows that the prepared nano-titanium dioxide photocatalyst is based on TiO 2 Anatase phase exists and there is no TiS in the product 2 components. TiO 2 (101) The diffraction peak shifts to a small angle...

Embodiment 2

[0023] Weigh 0.1 g TiS 2 The reaction raw materials were slowly added into 18 grams of deionized aqueous solution, fully stirred and mixed evenly. Then the mixed solution was put into a 20ml autoclave, sealed and placed in a muffle furnace, and reacted hydrothermally at 150° C. for 4 hours. Naturally cool to room temperature after the reaction, and dry at 80° C. after washing to obtain a light yellow sulfur self-doped titanium dioxide nanometer photocatalyst.

[0024] figure 1 The XRD pattern of the obtained sample is given, which is similar to that of pure TiS 2 and TiO 2 The comparison shows that the prepared nano titanium dioxide powder is based on TiO 2 Anatase phase exists and there is no TiS in the product 2 components. TiO 2 (101) The diffraction peak shifts to a small angle, proving that S atoms have replaced TiO 2 O-sites in the lattice. image 3 gives pure TiO 2 With the ultraviolet-visible absorption spectrogram of embodiment 2 product, prove that S self-d...

Embodiment 3

[0026] Weigh 0.1 g TiS 2 The reaction raw materials were slowly added into 18 grams of deionized aqueous solution, fully stirred and mixed evenly. Then the mixed solution was put into a 20ml autoclave, sealed and placed in a muffle furnace, and reacted hydrothermally at 180° C. for 4 hours. After the reaction is finished, it is naturally cooled to room temperature, washed and then dried to obtain a light yellow sulfur self-doped titanium dioxide nanometer photocatalyst.

[0027] figure 1 The XRD pattern of the obtained sample is given, which is similar to that of pure TiS 2 and TiO 2 The comparison shows that the prepared nano titanium dioxide powder is based on TiO 2 Anatase phase exists and there is no TiS in the product 2 components. TiO 2 (101) The diffraction peak shifts to a small angle, proving that S atoms have replaced TiO 2 O-sites in the lattice. image 3 gives pure TiO 2 With the ultraviolet-visible absorption spectrogram of embodiment 3 products, prove t...

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Abstract

The invention discloses a method for preparing a sulfur auto-doped titanium dioxide photocatalyst. The method comprises the following steps: a. fully mixing a reaction source of a titanium disulfide powder body with water to obtain a titanium disulfide suspension; b. transferring the titanium disulfide suspension to an autoclave, and reacting at a temperature of 120-180 DEG C for 4-12 hours; c. after the reaction in a step b is finished, cooling to a room temperature, washing a reaction product and drying to obtain the sulfur auto-doped titanium dioxide photocatalyst. Raw materials used in the preparation scheme provided by the invention are simple and environmentally friendly, the product is single, and the separation and the purification are easy. The preparation method is simple, the high temperature operation and the complex process are avoided, the reaction conditions are mild, the operation is safe and controllable, an existing sulfur-doped titanium dioxide photocatalyst preparation process is simplified, and the mass production is easily performed.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide photocatalyst, in particular to a preparation method of a non-metallic sulfur self-doping titanium dioxide photocatalyst, and belongs to the technical field of photocatalyst preparation. Background technique [0002] Due to titanium dioxide (TiO 2 ) has the characteristics of non-toxicity, stable physical and chemical properties, good semiconductor photoelectric properties and low price, making it have great application prospects in photocatalytic degradation of pollutants, photolysis of water to produce hydrogen and photovoltaic cells. However, due to the anatase TiO 2 The semiconductor has a wide band gap (3.2eV), and can only exert its photocatalytic activity in the ultraviolet region, while ultraviolet light only accounts for about 5% of the energy of sunlight, and visible light accounts for 43% of the total energy of sunlight. Utilization efficiency is limited. In 2001, Asahi e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04
Inventor 王芳李峰许小红王朱良张丽芳
Owner 山西师范大学
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