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Preparation method of molybdenum disulfide coated titanium dioxide hollow core-shell structure composite photocatalyst, and application of photocatalyst

A titanium dioxide and core-shell structure technology is applied to the preparation and application field of a titanium dioxide hollow core-shell structure composite photocatalyst coated with molybdenum disulfide, and can solve the problems of high cost of the composite photocatalyst and poor 4-nitrophenol effect. , to achieve the effect of simple synthesis method and strong adsorption performance

Inactive Publication Date: 2017-12-15
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the composite photocatalyst synthesized by the existing method is expensive and has a poor treatment effect on 4-nitrophenol, and provides a method for preparing a molybdenum disulfide-coated titanium dioxide hollow core-shell composite photocatalyst. its application

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  • Preparation method of molybdenum disulfide coated titanium dioxide hollow core-shell structure composite photocatalyst, and application of photocatalyst
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  • Preparation method of molybdenum disulfide coated titanium dioxide hollow core-shell structure composite photocatalyst, and application of photocatalyst

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specific Embodiment approach 1

[0014] Embodiment 1: The preparation method of a molybdenum disulfide-coated titanium dioxide hollow core-shell structure composite photocatalyst in this embodiment is specifically carried out according to the following steps:

[0015] 1. SiO 2 Disperse the powder in the mixed solution to obtain a reaction system. After ultrasonic dispersion for 10-20 minutes, add tetrabutyl titanate to the reaction system to obtain a suspension. Stir the suspension in a water bath at a temperature of 40-50°C for 10- 14h, centrifuged, washed and dried to obtain a white solid, and the white solid was calcined at a temperature of 500-600°C for 1h to obtain SiO 2 @TiO 2 ; The mixed solution is dehydrated alcohol and NH 3 ·H 2 Mixture of O, where NH 3 ·H 2 The weight percent of O is 25%~28%; The SiO 2 The mass of the powder and the volume ratio of the mixed solution are 1g:(1200~1400)mL; the SiO 2 The mass ratio of powder to tetrabutyl titanate is 1g:(0.8~1.2)mL;

[0016] Second, the (NH ...

specific Embodiment approach 2

[0017] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in Step 1, the suspension is stirred for 12 hours in a water bath at a temperature of 45°C. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: in Step 1, the white solid is calcined at a temperature of 550° C. for 1 hour. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a molybdenum disulfide coated titanium dioxide hollow core-shell structure composite photocatalyst, and application of the photocatalyst. The problems that the composite photocatalyst synthesized by the existing method is expensive and has bad 4-nitrophenol treatment effect are solved. According to the method, MoS2 grows on the surface of hollow TiO2 in situ by a hydrothermal method, the specific surface of the composite photocatalyst is increased, and the interfacial charge transfer rate is increased; furthermore, the preparation method has the advantages of simple, green and efficient synthesis method. The molybdenum disulfide coated titanium dioxide hollow core-shell structure composite photocatalyst is used for performing photocatalytic reduction on 4-nitrophenol into 4-aminophenol.

Description

technical field [0001] The invention relates to a preparation method and application of a titanium dioxide hollow core-shell structure composite photocatalyst coated with molybdenum disulfide. Background technique [0002] Efficient, green, and energy-saving have become the development trend of the future society, so semiconductor photocatalysis technology is particularly important in solving environmental pollution problems. Researching and preparing a more efficient photocatalysis is an important topic in the field of new energy materials at present and in the future. Currently, titanium dioxide (TiO 2 ) is the most studied and applied photocatalyst. Due to its non-toxic and harmless, easy preparation, good stability and many other advantages, it ranks among the forefront in the field of photocatalysis. So far, a variety of TiO with different morphologies 2 It has been successfully prepared, including nano flower structure, hollow spherical structure and nano sheet str...

Claims

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Application Information

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IPC IPC(8): B01J27/04C07C213/02C07C215/76
CPCC07C213/02B01J27/04B01J35/396B01J35/39C07C215/76
Inventor 于洪文郭娜
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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