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In2S3/MIL-53 (Fe) efficient photocatalytic composite material as well as preparation method and application thereof

A composite material and photocatalytic technology, which is applied in the field of wastewater treatment, can solve the problems of low semiconductor photocatalytic activity and narrow spectral response range, and achieve the effects of enhancing visible light absorption intensity, improving photocatalytic activity, and high separation efficiency

Active Publication Date: 2021-02-19
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide an In 2 S 3 / MIL-53(Fe) high-efficiency photocatalytic composite material, preparation method and application, to solve the technical problems of low semiconductor photocatalytic activity and narrow spectral response range in the prior art

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  • In2S3/MIL-53 (Fe) efficient photocatalytic composite material as well as preparation method and application thereof
  • In2S3/MIL-53 (Fe) efficient photocatalytic composite material as well as preparation method and application thereof
  • In2S3/MIL-53 (Fe) efficient photocatalytic composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This example gives an In 2 S 3 / MIL-53(Fe) efficient photocatalytic composite material, In 2 S 3 The mass ratio to MIL-53 (Fe) is 10:1 respectively.

[0045] In 2 S 3 In with a mass ratio of 10:1 to MIL-53(Fe) 2 S 3 / MIL-53(Fe) high-efficiency photocatalytic composite material is denoted as IM1;

[0046] In this example 2 S 3 The preparation method of / MIL-53 (Fe) high-efficiency photocatalytic composite material is characterized in that, the method is specifically carried out according to the following steps:

[0047] Step 1, InNO 3 4.5H 2 O is mixed with MIL-53(Fe) and added to water;

[0048] Step 2, dissolving L-cysteine ​​in water equal to step 1;

[0049] Step 3, under stirring conditions, add the solution in step 2 dropwise to the mixed solution in the above step 1, after stirring at room temperature, transfer it to a polytetrafluoroethylene-lined autoclave, and seal the reaction;

[0050] In step 4, after the reaction in step 3 is completed, the rea...

Embodiment 2

[0058] This example gives an In 2 S 3 / MIL-53(Fe) efficient photocatalytic composite material, In 2 S 3 The mass ratio to MIL-53 (Fe) is 20:1 respectively.

[0059] In 2 S 3 In with a mass ratio of 20:1 to MIL-53(Fe) 2 S 3 / MIL-53 (Fe) high-efficiency photocatalytic composite material is denoted as IM2.

[0060] In this example 2 S 3 The preparation method of / MIL-53 (Fe) high-efficiency photocatalytic composite material is basically the same as Example 1, the difference is only in:

[0061] In step one, InNO 3 4.5H 2 The concentration of O is 0.92mM respectively;

[0062] In the second step, the concentration of L-cysteine ​​was 2.76mM respectively.

[0063] The In that embodiment 2 makes 2 S 3 The SEM images of the high-efficiency photocatalytic composite IM2 / MIL-53(Fe) and the monomer MIL-53(Fe) under high magnification are shown in Fig. 1. It can be seen from Figure 1(a) that MIL-53 (Fe) presents a rod-like morphology with a diameter of about 5-6 μm and a r...

Embodiment 3

[0066] This example gives an In 2 S 3 / MIL-53(Fe) efficient photocatalytic composite material, In 2 S 3 The mass ratio to MIL-53 (Fe) is 30:1 respectively.

[0067] In 2 S 3 In with a mass ratio of 30:1 to MIL-53(Fe) 2 S 3 / MIL-53 (Fe) high-efficiency photocatalytic composite material is denoted as IM3.

[0068] In this example 2 S 3 The preparation method of / MIL-53 (Fe) high-efficiency photocatalytic composite material is basically the same as Example 1, the difference is only in:

[0069] In step one, InNO 3 4.5H 2 The concentration of O was 1.38mM, respectively;

[0070] In the second step, the concentration of L-cysteine ​​was 4.14mM respectively.

[0071] The In that embodiment 1 to embodiment 3 makes 2 S 3 / MIL-53(Fe) high-efficiency photocatalytic composite material IM1~3 and monomer MIL-53(Fe), monomer In 2 S 3 The UV-visDRS spectrum and PL spectrum are as follows image 3 , Figure 4 shown.

[0072] image 3 It is monomer MIL-53(Fe), monomer In ...

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Abstract

The invention provides an In2S3 / MIL-53(Fe) efficient photocatalytic composite material, a preparation method and application. The mass ratio of In2S3 to MIL-53(Fe) is (10-30):1. The preparation methodcomprises the following steps: step 1, mixing InNO3 hydrated with 4.5H2O with MIL-53(Fe), and adding the mixture into water; step 2, dissolving L-cysteine in the same amount of water as that in the step 1; step 3, dropwise adding the solution obtained in the step 2 into the mixed solution obtained in the step 1 under a stirring condition, conducting stirring at room temperature, transferring a formed mixture into a high-pressure reaction kettle with a polytetrafluoroethylene lining, and carrying out sealed reaction; and step 4, naturally cooling the reacted mixed solution obtained after the reaction in the step 3 to room temperature, repeatedly conducting washing with water and absolute ethyl alcohol to remove impurities from the product, and conducting drying to obtain the In2S3 / MIL-53(Fe) high-efficiency photocatalytic composite material. According to the efficient photocatalytic composite material disclosed by the invention, In2S3 is introduced, so that the diameter of an MIL-53(Fe) microrod is increased, the surface is rougher, more active sites can be provided, and the photocatalytic activity is favorably improved.

Description

technical field [0001] The invention belongs to the field of waste water treatment, relates to a composite light-efficient catalytic material, in particular to an In 2 S 3 / MIL-53(Fe) high-efficiency photocatalytic composite material, preparation method and application. Background technique [0002] The rapid development of urbanization and modernization has resulted in extremely serious pollution of water bodies by various heavy metal ions. Among many heavy metal pollutants, hexavalent chromium (Cr(VI)) seriously threatens the ecosystem and human health due to its high solubility, acute toxicity and potential carcinogenicity. Therefore, how to effectively, greenly and economically remove Cr(VI) from wastewater has become a hot issue of widespread concern to researchers. [0003] At present, the technologies for removing Cr(VI) in wastewater mainly include adsorption, membrane filtration, chemical precipitation, and electrochemical reduction. Although these methods can re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C02F1/30C02F101/22
CPCB01J31/1691C02F1/30B01J2531/842C02F2101/22B01J35/39Y02W10/37
Inventor 董社英张彤琛崔浩罗林波黄廷林
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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