期刊
APPLIED SURFACE SCIENCE
卷 526, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.146691
关键词
CuS; Snow flakes dendrites morphology; Nanosheet; Dye degradation; Photocatalyst
类别
资金
- Natural Science Foundation of Guangdong Province [2018A030313859]
- Major Project of Fundamental and Application Research of the Department of Education of Guangdong Province [2017KZDXM079]
- Natural Science Foundation of Huizhou University [20180927172750326, HZU201714, HZU201906]
- Department of Chemistry, University of Management AMP
- Technology, Lahore, Pakistan
- Korean Research Fellowship Program through the National Research Foundation of Korea (NRF), Korea - Ministry of Science and ICT [NRF-2019H1D3A1A01102931]
Two dimensional (2D) nanomaterials have interesting properties due to their lateral dimensions. Pure self -assembled L-cysteine stabilized covellite nanoplates (CuS@L-Cys NPs) and L-cysteine stabilized chalcocite nano leaves (Cu2S@L-Cys NLs) were synthesized by using a template free, the facile hydrothermal route with the best control of size, phase purity structure, morphology, and electrochemical properties. Novel CuS@L-Cys NPs and Cu2S@L-Cys NLs snowflakes dendrites were synthesized by varying synthetic parameters such as solvent, temperature (100-180 degrees C), reaction time (8-24 h), pH of reaction medium (7-14), the concentration of base (0.1-2.4 mL NH3) and concentration of thiourea (1-4 mmol). By changing these factors, different morphologies such as irregular, regular, trigonal, hexagonal leaf and snowflakes dendrites like shapes were observed. CuS@LCys NPs and Cu2S@L-Cys NLs were fabricated by using water and ethylenediamine (EDA) as solvent respectively. CuS@L-Cys NPs and Cu2S@L-Cys NLs were investigated for potential photocatalytic applications in methyl orange (MO) degradation under visible light with a detailed mechanism. The noteworthy, unique bandgap of 2 eV and the special morphology of CuS@L-Cys NPs increases the active sites for adsorption of dye, which causes extraordinary degradation activity. Furthermore, the L-cysteine (L-Cys) protective layer could efficiently alleviate the photocorrosion of CuS and Cu2S, giving rise to excellent stability.
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