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Preparation method and application of NiCd double non-noble metal modified CdS visible light catalyst

A non-precious metal and photocatalyst technology, applied in the direction of non-metallic elements, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low interface charge transfer efficiency, insufficient interface contact, and restrictions on industrial applications, etc. High absorption and visible light catalytic efficiency, simple operation, high specific surface area effect

Active Publication Date: 2018-11-06
FUZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the metal components involved in the above-mentioned invention patents are noble metals (resources are scarce and expensive), and the substrate photocatalyst involved is a wide bandgap semiconductor material (limited light absorption). The interface contact is not tight enough (interface charge transfer efficiency is low), which seriously restricts the actual industrial application

Method used

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  • Preparation method and application of NiCd double non-noble metal modified CdS visible light catalyst
  • Preparation method and application of NiCd double non-noble metal modified CdS visible light catalyst

Examples

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Embodiment 1

[0021] Add cadmium nitrate tetrahydrate and thiourea into a polytetrafluoroethylene reactor at a molar ratio of 1:3, add ethylenediamine to 60% of the volume of the reactor, stir magnetically until completely dissolved, and react at 200°C for 24 hours , the obtained product was naturally cooled to room temperature, washed several times with deionized water and ethanol respectively, the precipitate was collected by centrifugation, and dried in vacuum to obtain the CdS precursor.

Embodiment 2

[0023] Put 500mg of CdS prepared in Example 1 into a muffle furnace for heat treatment at 400°C for 2h to obtain an intermediate CdO / CdS composite material, which was slowly added to 50mL of 1mol / L NaBH 4 solution, stirred at room temperature for 4 hours, filtered, washed and dried to obtain a Cd / CdS heterojunction visible photocatalyst rich in sulfur vacancies, marked as Cd / CdS.

Embodiment 3

[0025] Disperse the Cd / CdS prepared in Example 2 in ethanol, add 5wt% nickel nitrate under magnetic stirring, mix well, irradiate with a 300W xenon lamp for 30min, and filter, wash and dry to obtain NiCd / CdS heterogeneous Junction photocatalyst, labeled as NiCd / CdS.

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Abstract

The invention discloses a preparation method and application of a NiCd double non-noble metal modified CdS visible light catalyst. CdS prepared by a solvothermal method is used as a precursor, an intermediate CdO / CdS composite material is synthesized by a heat treatment method, Cd / CdS is obtained by in-situ chemical reduction of sodium borohydride, and then the NiCd co-modified CdS visible light catalyst is obtained through a photodeposition method. Compared with the single CdS or single metal modified CdS, the NiCd / CdS composite visible light catalyst greatly improves the absorption and utilization of visible light and realizes very close contact between NiCd bimetal and CdS, the photoelectrons are well separated from holes, the photocatalytic efficiency is higher and the stability is higher. The NiCd double non-noble metal modified CdS visible light catalyst can be used for photocatalytic decomposition of water into hydrogen. The preparation method has low preparation condition requirements, is easy to operate, utilizes cheap and easily available raw materials, is environmentally friendly and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of material preparation and visible light photocatalysis, and in particular relates to a preparation method of NiCd double non-noble metal modified CdS visible light catalyst and its application in photocatalytic hydrogen production reaction. Background technique [0002] With the rapid development of the economy, the problems of environmental pollution and energy shortage have become increasingly prominent, becoming two major challenges facing the development of human society in the 21st century. Semiconductor photocatalysis technology is based on the conversion and storage of solar energy, and uses light energy to drive photocatalytic reactions. Converting solar energy into chemical energy is considered to be an ideal way to solve the two problems of energy and environment. However, the application of photocatalyst technology in actual production still faces some problems. For example, low quantum effici...

Claims

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Application Information

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IPC IPC(8): B01J27/043C01B3/04
CPCC01B3/042B01J27/043B01J35/39Y02E60/36
Inventor 刘平王波何沙高帆
Owner FUZHOU UNIVERSITY
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