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CdS/ZnS-NiS nano-cluster photocatalyst and preparation method and application thereof

A photocatalyst and nano-cluster technology, which is applied in the field of photocatalysis, can solve the problems of insufficient contact between different components, limited contact, and unreasonable component distribution, and achieve the effect of improving utilization efficiency and improving hydrogen production performance.

Active Publication Date: 2021-11-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently obtained catalytic systems often exhibit limited synergistic effects, mainly due to unreasonable distribution of components and insufficient contact between different components due to inappropriate preparation methods.

Method used

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  • CdS/ZnS-NiS nano-cluster photocatalyst and preparation method and application thereof
  • CdS/ZnS-NiS nano-cluster photocatalyst and preparation method and application thereof
  • CdS/ZnS-NiS nano-cluster photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] According to the method proposed by the present invention, a non-noble metal CdS / ZnS-NiS nanocluster photocatalyst with a nanoscale close contact interface is prepared:

[0047] (1) At room temperature, ultrasonically dissolve 1 mmol of cadmium acetate, 0.15 mmol of zinc acetate and 0.05 mmol of nickel acetate in 10 mL of deionized water to obtain a mixed precursor solution of Cd, Zn and Ni;

[0048] (2) Dissolve 3 mmol ethylenediamine and 2.5 mmol carbon disulfide in 20 mL deionized water at room temperature, and stir to obtain a uniform mixed solution.

[0049] (3) Add the precursor solution obtained in step (1) dropwise to the mixed solution obtained in step (2) under stirring to obtain a white turbid solution;

[0050] (4) Slowly heat the white turbid solution obtained in step (3) to 50° C. at a heating rate of 2° C. / min, and stir for 2 hours. The white turbid solution gradually turns into bright yellow;

[0051] (5) The bright yellow precipitate obtained in step (...

Embodiment 2

[0057] A non-noble metal CdS / ZnS-NiS nanocluster photocatalyst with a nanoscale close contact interface in the embodiment of the present invention, CdS, ZnS and NiS are uniformly distributed, and their molar ratio is Cd:Zn:Ni=1:0.15:0.025 , all the other are with embodiment 1. The photocatalytic hydrogen production activity of the catalytic system was 520.7μmol / h (10mg catalyst).

[0058] The image processing software Image J was used to measure and count the size of the catalyst prepared in this example step by step, and the size of the nanocluster catalyst was obtained to be 80-100 nm, and the size distribution of the nanoparticles constituting the nano-cluster was 3-5 nm.

Embodiment 3

[0060] A non-noble metal CdS / ZnS-NiS nanocluster photocatalyst with a nanoscale close contact interface in the embodiment of the present invention, CdS, ZnS and NiS are uniformly distributed, and their molar ratio is Cd:Zn:Ni=1:0.15:0.075 , all the other are with embodiment 1. The photocatalytic hydrogen production activity of the catalytic system was 473.3μmol / h (10mg catalyst).

[0061] The image processing software Image J was used to measure and count the size of the catalyst prepared in this example step by step, and the size of the nanocluster catalyst was obtained to be 80-100 nm, and the size distribution of the nanoparticles constituting the nano-cluster was 3-5 nm.

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Abstract

The invention discloses a CdS / ZnS-NiS nano-cluster photocatalyst and a preparation method and application thereof, and belongs to the technical field of photocatalysis. In the CdS / ZnS-NiS nano-cluster photocatalyst, semiconductors CdS and ZnS and a non-metal cocatalyst NiS are uniformly distributed in the nanoscale, and a nano-cluster with a porous structure is formed by self-assembly while a close contact interface is formed. The preparation method comprises the following steps: taking cadmium acetate, zinc acetate and nickel acetate as precursors, obtaining the CdS / ZnS-NiS nano-cluster photocatalyst which is composed of non-noble metals and has a nanoscale close contact interface through a one-step hydrothermal method. The catalyst system has a nanoscale close contact interface and excellent photocatalytic activity, so that the catalyst system can be applied to hydrogen production by photocatalytic decomposition of water.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a CdS / ZnS-NiS nano-cluster photocatalyst and a preparation method and application thereof. Background technique [0002] The excessive development and use of fossil energy is making the world face increasingly serious energy crisis and environmental problems, and the development of renewable non-fossil energy is imminent. Photocatalytic water splitting hydrogen production technology uses catalysts to convert the inexhaustible solar energy and the earth's abundant water resources into green and renewable hydrogen energy, which is expected to alleviate a series of global problems caused by the excessive use of fossil energy. To realize the large-scale popularization and application of photocatalytic water splitting technology, the key is to find and develop hydrogen-producing catalysts that can work efficiently and stably for a long time. However, most of the current catalyst...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J27/043B01J35/00B01J35/02B01J35/10C01B3/04
CPCB01J27/043B01J27/04C01B3/042B01J35/60B01J35/40B01J35/39Y02E60/36Y02P20/133
Inventor 马丹丹石建稳孙吕伟
Owner XI AN JIAOTONG UNIV
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