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CdS/NiS2 block photocatalyst, preparation method and application thereof

A photocatalyst and block technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of scarcity and high cost of precious metals, and achieve a short preparation period, good cycle stability, and enhanced absorption. and utilization effect

Active Publication Date: 2021-12-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CdS / NiS provided by the present invention 2 Bulk photocatalyst using transition metal sulfide NiS 2 to replace noble metals as cocatalysts, solving the problems of scarcity and high cost of noble metals; in addition, CdS / NiS 2 microrod array, NiS 2 Embedded on the surface of CdS microrods and in a convex shape, NiS 2 It has a tight combination with CdS, which is conducive to the transport of photogenerated carriers; and CdS / NiS 2 The microrod array is conducive to the multiple reflection of incident light, which can effectively improve the absorption and utilization of light, and has excellent photocatalytic hydrogen production performance; and the photocatalyst is in the form of a block, which is convenient to use and easy to recycle, and has good cycle stability. CdS photocatalytic hydrogen production technology provides a new way

Method used

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  • CdS/NiS2 block photocatalyst, preparation method and application thereof
  • CdS/NiS2 block photocatalyst, preparation method and application thereof
  • CdS/NiS2 block photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A CdS / NiS 2 A method for preparing a bulk photocatalytic material, comprising the following steps:

[0063] (1) Clean the titanium mesh with a size of 30mm*25mm (effective area 20mm*25mm) with 1mol / L hydrochloric acid, deionized water and absolute ethanol for 10 minutes respectively.

[0064] (2) Prepare 30 mL of a mixed solution of 0.1 mol / L cadmium chloride and 0.01 mol / L hexamethylenetetramine.

[0065] (3) Soak the titanium mesh in step (1) in the mixed solution in step (2), transfer it to a hydrothermal kettle with a polytetrafluoroethylene liner and seal it, and react at 100°C for 8 After cooling down to room temperature naturally, the samples were taken out, rinsed with deionized water and dried in a vacuum oven.

[0066] (4) Soak the sample in step (3) in 30mL of the aqueous solution prepared by dissolving 0.0008mol / L nickel nitrate hexahydrate and 0.01mol / L hexamethylenetetramine in deionized water, and transfer to the solution containing Packaged in a polyt...

Embodiment 2

[0069] A CdS / NiS 2 A method for preparing a bulk photocatalytic material, comprising the following steps:

[0070](1) Clean the titanium mesh with a size of 30mm*25mm (effective area 20mm*25mm) with 1mol / L hydrochloric acid, deionized water and absolute ethanol for 10 minutes respectively.

[0071] (2) Prepare 30 mL of a mixed solution of 0.1 mol / L cadmium chloride and 0.01 mol / L hexamethylenetetramine.

[0072] (3) Soak the titanium mesh in step (1) in the mixed solution in step (2), transfer it to a hydrothermal kettle with a polytetrafluoroethylene liner and seal it, and react at 100°C for 8 After cooling down to room temperature naturally, the samples were taken out, rinsed with deionized water and dried in a vacuum oven.

[0073] (4) Soak the sample in step (3) in 30mL of an aqueous solution prepared by dissolving 0.0002mol / L nickel nitrate hexahydrate and 0.01mol / L hexamethylenetetramine in deionized water, and transfer to the solution containing Packaged in a polytet...

Embodiment 3

[0076] A CdS / NiS 2 A method for preparing a bulk photocatalytic material, comprising the following steps:

[0077] (1) Clean the titanium mesh with a size of 30mm*25mm (effective area 20mm*25mm) with 1mol / L hydrochloric acid, deionized water and absolute ethanol for 10 minutes respectively.

[0078] (2) Prepare 30 mL of a mixed solution of 0.1 mol / L cadmium chloride and 0.01 mol / L hexamethylenetetramine.

[0079] (3) Soak the titanium mesh in step (1) in the mixed solution in step (2), transfer it to a hydrothermal kettle with a polytetrafluoroethylene liner and seal it, and react at 100°C for 8 After cooling down to room temperature naturally, the samples were taken out, rinsed with deionized water and dried in a vacuum oven.

[0080] (4) Soak the sample in step (3) in 30mL of an aqueous solution prepared by dissolving 0.0004mol / L nickel nitrate hexahydrate and 0.01mol / L hexamethylenetetramine in deionized water, and transfer to the solution containing Packaged in a polyte...

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Abstract

The invention discloses a CdS / NiS2 block photocatalyst, a preparation method and application thereof. The CdS / NiS2 block photocatalyst comprises a conductive substrate and a CdS / NiS2 microrod array loaded on the conductive substrate. According to the invention, a transition metal sulfide NiS2 is adopted to replace a noble metal as a cocatalyst, so that the problems of scarcity and high cost of the noble metal are solved; in the CdS / NiS2 microrod array, NiS2 is embedded in the surface of a CdS microrod and is in a convex shape, the NiS2 and the CdS microrod are tightly combined so as to facilitate transmission of photon-generated carriers, the CdS / NiS2 microrod array is beneficial to multiple reflection of incident light and enhancement of absorption and utilization rate of light, and excellent photocatalytic hydrogen production performance is shown; and the CdS / NiS2 block photocatalyst can be directly used without stirring, is convenient to use, easy to recycle and good in cycling stability, and provides a brand new way for a CdS photocatalytic hydrogen production technology.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalytic materials, in particular to a CdS / NiS 2 Bulk photocatalyst and its preparation method and application. [0002] technical background [0003] With the development of human society, non-renewable fossil energy such as oil, natural gas, and coal are used in large quantities, and their reserves are gradually reduced or even exhausted, which also leads to serious environmental pollution problems. Energy shortage and environmental degradation have become major problems that human beings are facing and need to be solved urgently. The development and utilization of renewable energy is of great significance to the sustainable development of human society. Among them, solar energy is considered as a promising clean and renewable energy source. Solar energy is inexhaustible and inexhaustible. As a primary energy source, it has broad application prospects. The research and application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J27/043B01J35/00C01B3/04
CPCB01J27/04B01J27/043C01B3/042C01B2203/1058C01B2203/1094B01J35/39Y02P20/133
Inventor 张京涛曾冬妮徐长福陈颖
Owner GUANGDONG UNIV OF TECH
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