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a cds/nis 2 Bulk 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 precious metal scarcity and high cost, and achieve short preparation cycle, good cycle stability, and enhanced absorption and the effect of utilization

Active Publication Date: 2022-07-08
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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  • a cds/nis <sub>2</sub> Bulk photocatalyst, preparation method and application thereof
  • a cds/nis <sub>2</sub> Bulk photocatalyst, preparation method and application thereof
  • a cds/nis <sub>2</sub> Bulk photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A CdS / NiS 2 The preparation method of bulk photocatalytic material comprises the following steps:

[0063] (1) A titanium mesh with a size of 30mm*25mm (effective area of ​​20mm*25mm) was ultrasonically cleaned in sequence with 1mol / L hydrochloric acid, deionized water and absolute ethanol for 10 minutes.

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

[0065] (3) Immerse the titanium mesh in step (1) in the mixed solution in step (2), transfer it to a hydrothermal kettle containing a polytetrafluoroethylene lining and encapsulate it, and perform a hydrothermal reaction at 100° C. for 8 h, and after naturally cooling to room temperature, the samples were taken out, rinsed with deionized water and dried in a vacuum drying oven.

[0066] (4) soak the sample in step (3) in 30 mL of an aqueous solution prepared by dissolving 0.0008 mol / L nickel nitrate hexahydrate and 0.01 mol / L hexamethylenetetramine in...

Embodiment 2

[0069] A CdS / NiS 2 The preparation method of bulk photocatalytic material comprises the following steps:

[0070](1) The titanium mesh with a size of 30mm*25mm (effective area of ​​20mm*25mm) was ultrasonically cleaned in sequence with 1mol / L hydrochloric acid, deionized water and absolute ethanol for 10 minutes.

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

[0072] (3) Immerse the titanium mesh in step (1) in the mixed solution in step (2), transfer it to a hydrothermal kettle containing a polytetrafluoroethylene lining and encapsulate it, and perform a hydrothermal reaction at 100° C. for 8 h, and after naturally cooling to room temperature, the samples were taken out, rinsed with deionized water and dried in a vacuum drying oven.

[0073] (4) Soak the sample in step (3) in 30 mL of an aqueous solution prepared by dissolving 0.0002 mol / L nickel nitrate hexahydrate and 0.01 mol / L hexamethylenetetramine i...

Embodiment 3

[0076] A CdS / NiS 2 The preparation method of bulk photocatalytic material comprises the following steps:

[0077] (1) The titanium mesh with a size of 30mm*25mm (effective area of ​​20mm*25mm) was ultrasonically cleaned in sequence with 1mol / L hydrochloric acid, deionized water and absolute ethanol for 10 minutes.

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

[0079] (3) Immerse the titanium mesh in step (1) in the mixed solution in step (2), transfer it to a hydrothermal kettle containing a polytetrafluoroethylene lining and encapsulate it, and perform a hydrothermal reaction at 100° C. for 8 h, and after naturally cooling to room temperature, the samples were taken out, rinsed with deionized water and dried in a vacuum drying oven.

[0080] (4) Soak the sample in step (3) in 30 mL of an aqueous solution prepared by dissolving 0.0004 mol / L nickel nitrate hexahydrate and 0.01 mol / L hexamethylenetetramine ...

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Abstract

The invention discloses a CdS / NiS 2 Bulk photocatalyst and preparation method and application thereof. The CdS / NiS 2 The bulk photocatalyst includes a conductive substrate and CdS / NiS supported on the conductive substrate 2 Microrod arrays. The present invention adopts transition metal sulfide NiS 2 to replace precious metals as cocatalysts, solving the problems of scarcity and high cost of precious metals; CdS / NiS 2 microrod array, NiS 2 Embedded on the surface of CdS microrods and in a convex shape, there is a close bond between the two, which is conducive to the transport of photogenerated carriers, CdS / NiS 2 The microrod array is beneficial to the multiple reflection of incident light, enhances the absorption and utilization of light, and exhibits excellent photocatalytic hydrogen production performance; in addition, CdS / NiS 2 The bulk photocatalyst can be used directly without stirring, is convenient to use, easy to recycle, and has good cycle stability, which provides a new approach for 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 preparation method and application thereof. [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 depleted, resulting in serious environmental pollution problems. Energy shortage and environmental degradation have become major problems facing human beings 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. Solar energy is inexhaustible and inexhaustible. As a primary energy source, it has broad application prospects. The research and application of solar energy have...

Claims

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Application Information

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Patent Type & Authority Patents(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