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

Autor:	G. Lalev, Christopher M. A. Parlett, Karen Wilson, Ung Thi Dieu Thuy, Nguyen Quang Liem
Rok vydání:	2014
Předmět:	Materials science Band gap Process Chemistry and Technology Nanotechnology General Chemistry Catalysis Hydrothermal circulation chemistry.chemical_compound chemistry Nanocrystal Chemical engineering Photocatalysis Rhodamine B Hydrothermal synthesis Photodegradation Visible spectrum
Zdroj:	Catalysis Communications. 44:62-67
ISSN:	1566-7367
Popis:	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. © 2013 Elsevier B.V.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::38fc03ae75d075f8fcf25c92ed14ab2d https://doi.org/10.1016/j.catcom.2013.07.030 Zobrazit plný text záznamu Full Text from ScienceDirect