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A kind of photocatalyst and its preparation method and application

A technology of photocatalysts and oxides, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of small wavelength range and easy recombination, so as to improve photocatalytic efficiency and high catalytic efficiency The effect of efficiency and fast catalytic speed

Inactive Publication Date: 2016-08-24
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Both of the above two patents disclose the formula of composite photocatalyst, but the composite photocatalyst has a small wavelength range of light utilization, that is, most of them can only absorb light in the ultraviolet region, photogenerated electrons and holes are easy to recombine, and noble metals are required as cocatalysts, etc. Weaknesses and deficiencies

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  • A kind of photocatalyst and its preparation method and application
  • A kind of photocatalyst and its preparation method and application
  • A kind of photocatalyst and its preparation method and application

Examples

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Embodiment 1

[0048] A photocatalyst, which is a metal compound obtained by compounding a metal oxide and a metal sulfide by mass percentage, that is, metal oxide: metal sulfide in a ratio of 99%: 1%;

[0049] The metal oxide is zinc oxide;

[0050] The metal sulfide is molybdenum disulfide;

[0051] The zinc oxide is an irregular nanosheet structure, the size of the nanosheet structure is 10-900nm, and the thickness is 10-50nm;

[0052] The molybdenum disulfide is an irregular nano sheet structure, the size of the nano sheet structure is 10-100nm, and the thickness is 0.6-5nm.

[0053] The preparation method of above-mentioned photocatalyst specifically comprises the steps:

[0054] 1. Preparation of zinc oxide nanosheets by traditional chemical vapor deposition method

[0055] (1) Fully grind zinc oxide powder and graphite powder with equal mass ratio, then add 5% phosphorus pentoxide, and then put it into a quartz boat;

[0056] (2), Al coated with Au film 2 o 3 The substrate is pl...

Embodiment 2

[0075] A photocatalyst, which is a metal compound obtained by compounding a metal oxide and a metal sulfide by mass percentage, that is, metal oxide: metal sulfide in a ratio of 99.9%: 0.1%;

[0076] It is a composite structure of metal oxide and metal sulfide. It is a photocatalyst. It is a composite structure of metal oxide and metal sulfide. It is mixed according to the mass ratio of metal oxide and metal sulfide at 99.9%, stirred for 30 minutes, and ultrasonicated for 30 minutes. , with a power of 200W, a drying temperature of 100°C, and a drying time of 24 hours to obtain the photocatalyst;

[0077] The metal oxide is zinc oxide;

[0078] The metal sulfide is molybdenum disulfide;

[0079] The zinc oxide is an irregular nanosheet structure, the size of the nanosheet structure is 10-900nm, and the thickness is 10-50nm;

[0080] The molybdenum disulfide is an irregular nano sheet structure, the size of the nano sheet structure is 10-100nm, and the thickness is 0.6-5nm.

...

Embodiment 3

[0083] A photocatalyst, which is a metal compound obtained by compounding metal oxide and metal sulfide in terms of mass percentage, that is, metal oxide: metal sulfide ratio of 99.99%: 0.01%;

[0084] The metal oxide is zinc oxide;

[0085] The metal sulfide is molybdenum disulfide;

[0086] The zinc oxide is an irregular nanosheet structure, the size of the nanosheet structure is 10-900nm, and the thickness is 10-50nm;

[0087] The molybdenum disulfide is an irregular nano sheet structure, the size of the nano sheet structure is 10-100nm, and the thickness is 0.6-5nm.

[0088] The preparation method of above-mentioned a kind of photocatalyst, with embodiment 1.

[0089] The ZnO-MoS obtained in the above-mentioned examples 1-3 2 The absorption curves of the composite photocatalyst and pure ZnO and P25 solid powder measured by UV-Vis spectrometer (manufacturer: Shimadzu, model: Shimadzu UV-2600) at room temperature are as follows: Figure 5 shown, from Figure 5 It can be...

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Abstract

The invention discloses a photocatalyst and a preparation method and application thereof. The photocatalyst is a metal composite which is formed by compounding 99.99-98 percent by weight of metal oxide and 0.01-2 percent by weight of metal sulfide. The metal oxide is zinc oxide or titanium oxide, and the metal sulfide is molybdenum sulfide or tungsten sulfide. The preparation method of the photocatalyst comprises the following steps: stirring and mixing the metal oxide and the metal sulfide, performing ultrasonic treatment on the mixture and drying to obtain the photocatalyst. The photocatalyst can realize absorption of light of all wave bands of sunlight, improve the photoelectric conversion efficiency and inhibit carrier recombination at the same time, thereby comprehensively improving the photocatalytic efficiency. The photocatalyst has higher catalytic efficiency and higher catalytic speed on decomposed products compared with other photocatalysts. The photocatalyst is relatively full and comprehensive in the utilization of sunlight. In addition, the catalyst has the characteristics of low cost and easy availability.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a photocatalyst and its preparation method and application. Background technique [0002] Environmental pollution, as one of the problems in the world today, has received more and more attention. It can be said that it is expected to solve this problem efficiently, safely and at low cost. The excellent mechanism of photocatalysis fully meets the above requirements. The only requirement is that we need to prepare photocatalysts with high catalytic performance and light energy utilization. However, at present, the materials used for photocatalysis at home and abroad mainly include TiO 2 Thanks to its low cost, good physical and chemical properties, and good biocompatibility, it has become a natural and excellent photocatalyst material, but because of its wide band gap of 3.2eV, it can only absorb light in the ultraviolet band 5% of sunlight, greatly reducing the utilizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J27/047A62D3/17A62D101/28
Inventor 王现英刘洋洋谢澍梵
Owner UNIV OF SHANGHAI FOR SCI & TECH
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