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Fe(Ⅲ) cluster/bismuth oxyiodate composite photocatalytic material and its preparation method and application

A technology of composite photocatalysis and bismuth oxyiodate, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the low recombination efficiency of photogenerated electrons and holes , affecting the stability of the composite photocatalyst, high photogenerated electron-hole recombination rate, etc., to achieve the effect of improving photocatalytic performance, excellent photocatalytic performance, and broadening the range of light absorption

Active Publication Date: 2020-08-14
HUNAN UNIV
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Problems solved by technology

However, how to effectively introduce defects into the lattice of bismuth oxyiodate is still a difficult problem to be solved urgently
In addition, by introducing a co-catalyst, the problem of high recombination rate of photogenerated electrons and holes in bismuth oxyiodate can be solved. It can be seen that loading Fe(Ⅲ) clusters as a co-catalyst on bismuth oxyiodate should also solve the above problems. There is a problem of high photogenerated electron-hole recombination rate in bismuth oxyiodate, but the following problems still exist in the actual preparation process of Fe(Ⅲ) cluster / bismuth oxyiodate composite photocatalytic materials: (1) how to The co-catalyst Fe(Ⅲ) clusters were successfully supported on the surface of defective bismuth oxyiodate; The performance of catalytic materials has an important impact, for example, excessive Fe(Ⅲ) clusters will inhibit the catalytic effect, so it is necessary to explore the appropriate loading of Fe(Ⅲ) clusters; (3) Fe(Ⅲ) clusters will appear iron The leaching of ions, thus affecting the stability of the composite photocatalyst
Therefore, how to overcome the problems in the above-mentioned prior art to obtain a Fe(Ⅲ) cluster / iodic acid oxygen compound with wide photoresponse range, low recombination efficiency of photogenerated electrons and holes, strong catalytic performance and good reusability Bismuth composite photocatalytic materials and matching reaction conditions are mild, easy to operate, green and environmentally friendly, and can be used for large-scale preparation of Fe(Ⅲ) clusters / bismuth oxyiodate composite photocatalytic materials. The scope of application and the effective removal of pollutants (such as antibiotics) in the environment have very important practical significance

Method used

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  • Fe(Ⅲ) cluster/bismuth oxyiodate composite photocatalytic material and its preparation method and application
  • Fe(Ⅲ) cluster/bismuth oxyiodate composite photocatalytic material and its preparation method and application
  • Fe(Ⅲ) cluster/bismuth oxyiodate composite photocatalytic material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An Fe(III) cluster / bismuth oxyiodate composite photocatalytic material comprises Fe(III) clusters and defect-type bismuth oxyiodate, and the Fe(III) cluster is supported on the defect-type bismuth oxyiodate.

[0036] In this embodiment, the mass ratio of the Fe(III) clusters to the defective bismuth oxyiodate in the Fe(III) cluster / bismuth oxyiodate composite photocatalytic material is 1:2000.

[0037] A kind of preparation method of the Fe(Ⅲ) cluster / bismuth oxyiodate composite photocatalytic material of above-mentioned present embodiment, comprises the following steps:

[0038] S1. Accurately weigh 1 mmol of bismuth nitrate pentahydrate and 1 mmol of sodium iodate into 80 mL of water, stir magnetically for 2 hours in the dark at room temperature, wash the white precipitate with water and ethanol alternately for 3 times, and store at 60°C Drying for 12 hours under the hood to obtain bismuth oxyiodate.

[0039] S2. Put the bismuth oxyiodate obtained in S1 into an alumi...

Embodiment 2

[0042] A kind of Fe(Ⅲ) cluster / bismuth oxyiodate composite photocatalytic material is basically the same as Example 1, the difference is only: in the Fe(Ⅲ) cluster / bismuth oxyiodate composite photocatalytic material of embodiment 2, Fe (Ⅲ) The mass ratio of the cluster to the defect-type bismuth oxyiodate is 2:2000.

[0043] A preparation method of the Fe(III) cluster / bismuth oxyiodate composite photocatalytic material in the above-mentioned present embodiment is basically the same as the preparation method in Example 1, the difference is only: in the preparation method in Example 2 The consumption of raw material iron trichloride hexahydrate is 0.0020g.

Embodiment 3

[0045] A kind of Fe(Ⅲ) cluster / bismuth oxyiodate composite photocatalytic material is basically the same as embodiment 1, the difference is only: in the Fe(Ⅲ) cluster / bismuth oxyiodate composite photocatalytic material of embodiment 3, Fe (Ⅲ) The mass ratio of the cluster to the defect-type bismuth oxyiodate is 6:2000.

[0046] A preparation method of the Fe(III) cluster / bismuth oxyiodate composite photocatalytic material in the above-mentioned present embodiment is basically the same as the preparation method in Example 1, the difference is only: in the preparation method in Example 3 The consumption of raw material iron trichloride hexahydrate is 0.0060g.

[0047] figure 1 It is a scanning electron microscope image of the Fe(III) cluster / bismuth oxyiodate composite photocatalytic material prepared in Example 3 of the present invention. from figure 1 It can be seen that after Fe(Ⅲ) clusters are loaded, the surface of defective bismuth oxyiodate becomes smoother, and these ...

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Abstract

The invention discloses a Fe(Ⅲ) cluster / bismuth oxyiodate composite photocatalytic material and its preparation method and application. The photocatalytic material includes defective bismuth oxyiodate and Fe(Ⅲ) clusters loaded thereon. cluster. The preparation method includes the following steps: preparing bismuth oxyiodate monomer; preparing defective bismuth oxyiodate through calcination; and preparing the above photocatalytic material through water bath reaction. The photocatalytic material of the present invention has the advantages of wide photoresponse range, low recombination efficiency of photogenerated electrons and holes, strong catalytic performance, good stability, good reusability, simple recovery, high recovery rate, etc., and can be widely used to treat pollution in the environment. It has high use value and good application prospects. The preparation method of the present invention has the advantages of simple process, convenient operation, low raw material cost, low energy consumption, short time consumption, mild reaction conditions and easy control, green and environmental protection, etc. The prepared material has a high degree of crystallization, does not change its properties, and exhibits shows good application prospects.

Description

Technical field [0001] The invention belongs to the technical field of functional nanomaterials and relates to a Fe(III) cluster / bismuth oxyiodate composite photocatalytic material and its preparation method and application. Background technique [0002] With the rapid expansion of social economy and human activities, environmental damage caused by inappropriate discharge of refractory organic pollutants has adversely affected the human body and ecosystems. Antibiotics are one of the most important pharmaceutical precursors and are widely used in medicine, animal husbandry, agriculture and other fields. However, the abuse of antibiotics has led to the emergence of a large number of antibiotics in the environment, which in turn has led to the emergence of antibiotic-resistant bacteria and resistance genes. These antibiotic-resistant bacteria and resistance genes are harmful to humans and cause a large number of diseases and deaths every year. Therefore, developing a green, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06B01J23/745C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J27/06B01J23/745C02F1/30C02F2305/10C02F2101/34C02F2101/36C02F2101/38B01J35/39
Inventor 李必胜赖萃张明明曾光明柳诗语易欢张玉锦李敏芳安宁安子文周雪融
Owner HUNAN UNIV
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