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Synthesis of CuS and CuS/ZnS core/shell nanocrystals for photocatalytic degradation of dyes under visible light

Paper ID Volume ID Publish Year Pages File Format Full-Text
50258 46786 2014 6 PDF Available
Title
Synthesis of CuS and CuS/ZnS core/shell nanocrystals for photocatalytic degradation of dyes under visible light
Abstract

•A facile hydrothermal route for large scale synthesis of CuS and CuS/ZnS Core/Shell nanoparticles.•Methodology to tune the CuS morphology from platelets, to spherical nanoparticles or nanoflowers.•Visible light active photocatalysts with excellent stability towards photocorrosion.

High quality CuS and CuS/ZnS core/shell nanocrystals (NCs) were synthesized in a large quantity using a facile hydrothermal method at low temperatures of 60 °C and evaluated in the photodegradation of Rhodamine B (RhB) under visible light irradiation. Synthesis time plays an important role in controlling the morphology, size and photocatalytic activity of both CuS and CuS/ZnS core/shell NCs which evolve from spherical shaped particles to form rods with increasing reaction time, and after 5 h resemble “flower” shaped morphologies in which each “flower” is composed of many NCs. Photocatalytic activity originates from photo-generated holes in the narrow bandgap CuS, with encapsulation by large bandgap ZnS layers used to form the core/shell structure that improves the resistance of CuS towards photocorrosion. Such CuS/ZnS core/shell structures exhibit much higher photocatalytic activity than CuS or ZnS NCs alone under visible light illumination, and is attributed to higher charge separation rates for the photo-generated carriers in the core/shell structure.

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Keywords
CuS; CuS/ZnS core/shell nanocrystals; Hydrothermal synthesis; Photocatalytic activity; Water depollution
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Synthesis of CuS and CuS/ZnS core/shell nanocrystals for photocatalytic degradation of dyes under visible light
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 44, 10 January 2014, Pages 62–67
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us