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Metal organic framework modified tin sulfide composite photocatalyst and its preparation method and application

A metal-organic framework and stannous sulfide technology, applied in the field of photocatalysis, can solve the problems of high electron-hole recombination rate of stannous sulfide, affecting light absorption efficiency, poor photocatalytic activity, etc., and achieve photogenerated electron-hole utilization High efficiency, high practical application value, and high photocatalytic activity

Active Publication Date: 2019-11-12
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Tin sulfide (SnS) is an extremely important metal sulfide semiconductor, which has the advantages of suitable energy band position (1.07-1.3eV), good chemical stability, economical and environmental protection, etc. Protection and other fields have good application prospects, but stannous sulfide has problems such as high electron-hole recombination rate and poor photocatalytic activity, which limit the practical application of this material.
In addition, stannous sulfide nanoparticles are easy to aggregate into agglomerates, resulting in a decrease in the specific surface area, thereby affecting the light absorption efficiency

Method used

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  • Metal organic framework modified tin sulfide composite photocatalyst and its preparation method and application
  • Metal organic framework modified tin sulfide composite photocatalyst and its preparation method and application
  • Metal organic framework modified tin sulfide composite photocatalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A metal-organic framework modified stannous sulfide composite photocatalyst, the metal-organic framework modified stannous sulfide composite photocatalyst is supported by a metal-organic framework, and the metal-organic framework is loaded with stannous sulfide, wherein the metal-organic framework is MIL-53( Fe).

[0042] In this example, the mass percentage of MIL-53(Fe) in the metal-organic framework-modified stannous sulfide composite photocatalyst is 6.63%.

[0043] In this example, the specific surface area of ​​the MOF-modified stannous sulfide composite photocatalyst is 23.965m 2 / g.

[0044] In this embodiment, MIL-53(Fe) is rod-shaped, and stannous sulfide is block-shaped.

[0045] The preparation method of the metal-organic framework modified stannous sulfide composite photocatalyst of the above-mentioned present embodiment comprises the following steps:

[0046] (1) Preparation of rod-shaped MIL-53(Fe):

[0047] (1.1) Mix ferric chloride hexahydrate, tere...

Embodiment 2

[0061] A metal-organic framework-modified stannous sulfide composite photocatalyst, which is basically the same as the metal-organic framework-modified stannous sulfide composite photocatalyst of Example 1, the difference being: the metal-organic framework-modified stannous sulfide composite photocatalyst of Example 2 The mass percent content of MIL-53(Fe) in it is 9.95%.

[0062] A method for preparing the metal-organic framework-modified stannous sulfide composite photocatalyst of the above-mentioned present embodiment is basically the same as the preparation method of the metal-organic framework-modified stannous sulfide composite photocatalyst of Example 1, the difference being: the method of embodiment 2 The amount of rod-shaped MIL-53(Fe) in step (2.1) was 15 mg.

[0063] The metal-organic framework modified stannous sulfide composite photocatalyst prepared in Example 2 was named MS-15.

[0064] figure 1 It is the SEM figure of the metal-organic framework modified stan...

Embodiment 3

[0070] A metal-organic framework-modified stannous sulfide composite photocatalyst, which is basically the same as the metal-organic framework-modified stannous sulfide composite photocatalyst of Example 1, the difference being: the metal-organic framework-modified stannous sulfide composite photocatalyst of Example 3 The mass percent content of MIL-53(Fe) in it is 13.3%.

[0071] A kind of preparation method of the metal-organic framework modified stannous sulfide composite photocatalyst of the above-mentioned present embodiment is basically the same as the preparation method of the metal-organic framework modified stannous sulfide composite photocatalyst of embodiment 1, the difference is: embodiment 3 The dosage of rod-shaped MIL-53(Fe) in step (2.1) was 20 mg.

[0072] The metal-organic framework modified stannous sulfide composite photocatalyst prepared in Example 3 was named MS-20.

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Abstract

The invention discloses a metal organic framework modified stannous sulfide composite photocatalyst as well as a preparation method and application thereof. The composite photocatalyst takes a metal organic framework MIL-53(Fe) as a carrier and is loaded with stannous sulfide. The preparation method of the composite photocatalyst comprises the following steps: mixing MIL-53(Fe) with stannous sulfide, adding solution containing S<2->, and carrying out precipitation reaction, so that the metal organic framework modified stannous sulfide composite photocatalyst is obtained. The composite photocatalyst disclosed by the invention has the advantages of environment friendliness, large specific surface area, many reaction sites, high photogenerated electron-hole utilization rate, high photocatalytic activity, good stability and corrosion resistance, and the preparation method has the advantages of simplicity in operation, low raw material cost, low energy consumption, short consumed time and easy-to-control conditions. The composite photocatalyst disclosed by the invention can be used for degrading hexavalent chromium wastewater, has the advantages of high degradation efficiency, simple application method, low cost and no secondary pollution and has a good practical application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and relates to a stannous sulfide composite photocatalyst and its preparation method and application, in particular to a metal organic framework modified stannous sulfide composite photocatalyst and its preparation method and application. Background technique [0002] Energy shortage and environmental pollution have become important problems faced by human beings. Purification technologies that use limited resources in nature to effectively control and solve environmental pollution problems have attracted much attention. As a green purification technology, photocatalytic technology has made great progress in its research in recent years. As a new technology for pollution treatment, photocatalytic technology has the advantages of high efficiency and energy saving, less secondary pollution, clean and non-toxic, and simplified process compared with other methods, which makes photocatalytic tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J31/28C02F1/28C02F1/30B01J20/30C02F101/22
CPCB01J20/226B01J31/28C02F1/285C02F1/30C02F2101/22C02F2305/10
Inventor 袁兴中夏琦陈晓红王侯王惠曾光明
Owner HUNAN UNIV
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