Preparation method and application of cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst

A niobium pentoxide and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of high cost of antibiotics and low efficiency of niobium pentoxide catalyst, and achieve strong light absorption capacity, superior photocatalytic performance, and high carrier separation efficiency effect

Pending Publication Date: 2022-08-05
HUBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a preparation method and application of a cadmium zinc sulfide / mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst to solve the problem of high cost of photocatalytic degradation of antibiotics in the above-mentioned prior art. The problem of low efficiency of single niobium pentoxide catalyst

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  • Preparation method and application of cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst
  • Preparation method and application of cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst
  • Preparation method and application of cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst

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Embodiment 1

[0041] A cadmium zinc sulfide / mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst, the cadmium zinc sulfide / mesoscopic niobium pentoxide S-type heterojunction is composed of the (001) diffraction crystal plane of mesoscopic niobium pentoxide, The (002) diffraction crystal plane of cadmium zinc sulfide is formed; cadmium zinc sulfide is uniformly attached to the surface of mesoscopic niobium pentoxide, forming a close-contact heterojunction structure.

[0042] The preparation method of cadmium zinc sulfide / mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst, the specific steps are as follows:

[0043] Preparation of cadmium zinc sulfide:

[0044] A1, dissolve 0.44g of zinc acetate in a mixed solution of 20mL of ultrapure water and 50mL of ethylenediamine, and hydrothermally react at 160°C for 20h to obtain a white powder;

[0045] A2: Disperse the white powder in A1 into 60 mL of ethylene glycol, dissolve 0.0839 g of cadmium chloride in th...

Embodiment 2

[0056] The difference between this example and Example 1 is that the yellow powder obtained in A2 and the mesoscopic niobium pentoxide obtained in B3 are mixed in a mass ratio of 80:20, marked as Cd 0.5 Zn 0.5 S / 20%Nb 2 O 5 .

Embodiment 3

[0058] The difference between this example and Example 1 is that the yellow powder obtained in A2 and the mesoscopic niobium pentoxide obtained in B3 are mixed in a mass ratio of 60:40, marked as Cd 0.5 Zn 0.5 S / 40%Nb 2 O 5 .

[0059] The present invention by changing the Cd 0.5 Zn 0.5 S and Nb 2 O 5 The photocatalysts with different mass ratios can be obtained. The in-situ X-ray photoelectron spectroscopy analysis proves that the composite photocatalyst is an S-type heterojunction fiber photocatalyst. For the above examples, cadmium sulfide Zinc is in the form of cadmium zinc sulfide nanosheets, and mesoscopic niobium pentoxide is in the form of mesoscopic niobium pentoxide nanofibers. The photocatalytic performance test results show that the photocatalyst can convert antibiotic molecules in wastewater under visible light irradiation. Effective degradation, the efficiency is more than 90%, and the degradation rate is still more than 90% after five cycles, which proves ...

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Abstract

The invention relates to a cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst. A cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction is composed of a (001) diffraction crystal face of mesoscopic niobium pentoxide and a (002) diffraction crystal face of cadmium zinc sulfide. The preparation method comprises the following steps: adding mesoscopic niobium pentoxide in the hydrothermal growth process of cadmium zinc sulfide, and carrying out secondary hydrothermal treatment to obtain the cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst. The zinc cadmium sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst is applied to catalytic oxidation degradation and reduction of antibiotics under visible light. The zinc cadmium sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst is applied to hydrogen production through catalytic oxidation, degradation and reduction of antibiotics under visible light. The cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst has the beneficial effects that the photocatalytic performance is excellent, and due to the formation of an S-type heterojunction, the cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst has stronger light absorption capacity and higher carrier separation efficiency.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a preparation method and application of a cadmium zinc sulfide / mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst. Background technique [0002] The domestic sewage produced rapidly in the process of industrialization and urbanization has exceeded the self-purification capacity of natural water bodies; the excessive discharge of comprehensive sewage has also caused damage to the water environment and the survival of various aquatic animals and plants, thus affecting the health and development of human beings. Most of the ecological environments in my country's traditional energy-rich areas are relatively fragile, and energy development and utilization will cause greater pressure on the ecological environment, affecting my country's ecological security and social stability. Therefore, effectively alleviating the problem of environmental pollution and dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/06C02F1/30C02F1/70C02F1/72C01B3/22C02F101/30C02F101/38
CPCB01J35/004B01J27/04B01J35/06C02F1/30C02F1/725C02F1/72C02F1/70C01B3/22C02F2101/30C02F2101/38C02F2305/10C01B2203/1076Y02E60/36Y02W10/37
Inventor 王楷王湖坤邵秀丽李可陈郭强
Owner HUBEI NORMAL UNIV
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