CdS nanorod@ few-layer ReS2 nanosheet composite photocatalyst

A nanosheet and nanorod technology, applied in the field of composite photocatalyst and preparation, can solve the problems of narrow solar spectral response and low photocatalytic efficiency, and achieve the effects of good process repeatability, large specific surface area and many active sites.

Active Publication Date: 2019-07-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the narrow solar spectral response and the rapid recombination of photoinduced electron-hole pairs, single photocatalysts such as pure ReS 2 The low photocatalytic efficiency of nanosheets remains an obstacle for practical application

Method used

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  • CdS nanorod@ few-layer ReS2 nanosheet composite photocatalyst
  • CdS nanorod@ few-layer ReS2 nanosheet composite photocatalyst
  • CdS nanorod@ few-layer ReS2 nanosheet composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1)ReS 2 Single crystal bulk as raw material, prepared ReS by ball milling 2 powder, the ball milling time is 8h, and the ball milling speed is 400rpm. Get ReS 2 powder dispersed in ethanol, where ReS 2 Powder quality: the volume of ethanol is about 1mg: 4ml; after that, it is sonicated in an ultrasonic machine, and the ultrasonication time is about 2h. After the above ultrasonic dispersion was left to stand for several hours, centrifuge at 4000rpm for 30min in a centrifuge to obtain the supernatant, then centrifuge the supernatant at 10000rpm for 30min to collect the precipitate attached on the centrifuge tube, pass the precipitate through ethanol and deionized water in turn Washed 3 times, then transferred to a Petri dish, and finally freeze-dried the nanosheets for several hours to form a uniformly dispersed few-layer ReS 2 Nanosheets.

[0027] (2) Cadmium acetate dihydrate (Cd(CH 3 COO) 2 2H 2 O) and dibenzyl disulfide (C 14 h 14 S 2) were ultrasonically ...

Embodiment 2

[0030] The difference from Example 1 is that the CdS supernatant layer and the few-layer ReS 2 The amount of nanosheets added meets ReS 2 The proportion of the final CdS nanorods @ReS 2 10% of the proportion of nanosheet composite photocatalyst.

Embodiment 3

[0032] The difference from Example 1 is that the CdS supernatant layer and the few-layer ReS 2 The amount of nanosheets added meets ReS 2 The proportion of the final CdS nanorods @ReS 2 20% of the proportion of nanosheet composite photocatalyst.

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Abstract

The invention discloses a CdS nanorod@ few-layer ReS2 nanosheet composite photocatalyst, and a preparation method thereof. The preparation method mainly comprises following steps: 1, ball milling is carried out to prepare ReS2; 2, ReS2 powder is dispersed in a solvent such as ethanl for ultrasonic peeling; 3, an obtained ultrasonic dispersed solution is subjected to centrifugalization, a product is collected, washed, and freeze-dried so as to obtain few-layer ReS2 nanosheet; 4, cadmium acetate dihydrate and dibenzyl disulfide are ultrasonically dispersed in deionized water and ethanol respectively, obtained two suspensions are introduced into an autoclave for hydrothermal treatment, and at last, an obtained corresponding product is subjected to centrifugalization washing for several timesto obtain CdS nanorod; and 5, the prepared CdS nanorod and the ReS2 nanosheet are subjected to second hydrothermal compounding so as to obtain the CdS nanorod@ReS2 nanosheet composite photocatalyst. The CdS nanorod@ReS2 nanosheet composite photocatalyst prepared through the preparation method is excellent in performance, simple in operation and high in application value.

Description

technical field [0001] The invention relates to the field of photocatalytic hydrogen production, in particular to a composite photocatalyst and a preparation method. Background technique [0002] The energy issue is a crisis and a major challenge that the world is currently facing. At present, the oil industry is facing huge uncertainties. At the same time, the main energy sources in the world are non-renewable primary energy sources. This kind of long-term resource consumption is bound to be unsustainable. In terms of new energy, such as hydrogen energy, it has high calorific value and energy utilization rate, and it is also a clean energy that can be recycled. H 2 Due to the high energy storage density and the combustion of water, which does not pollute the environment, it has great application potential. Direct conversion of solar energy into storable and transportable chemical fuels remains a challenging problem in the field of sustainable energy research. In particul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J35/02C01B3/04
CPCB01J27/0573B01J35/004B01J35/026C01B3/042C01B2203/0277C01B2203/1041C01B2203/1094Y02E60/36
Inventor 吕斌周子文曾升叶志镇
Owner ZHEJIANG UNIV
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