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Preparation and Photocatalytic Properties of CdS and ZnS Nanomaterials Derived from Metal Xanthate

In this paper, we report a new, simple method for the synthesis of CdS and ZnS nanoparticles (NPs) prepared in a basic aqueous medium using metal xanthate as the sulfur source. The structure, morphology, size distribution, optical band gap, and photocatalytic properties of the newly obtained nanomat...

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Autores principales: Mintcheva, Neli, Gicheva, Gospodinka, Panayotova, Marinela, Wunderlich, Wilfried, Kuchmizhak, Aleksandr A., Kulinich, Sergei A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6829229/
https://www.ncbi.nlm.nih.gov/pubmed/31614575
http://dx.doi.org/10.3390/ma12203313
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author Mintcheva, Neli
Gicheva, Gospodinka
Panayotova, Marinela
Wunderlich, Wilfried
Kuchmizhak, Aleksandr A.
Kulinich, Sergei A.
author_facet Mintcheva, Neli
Gicheva, Gospodinka
Panayotova, Marinela
Wunderlich, Wilfried
Kuchmizhak, Aleksandr A.
Kulinich, Sergei A.
author_sort Mintcheva, Neli
collection PubMed
description In this paper, we report a new, simple method for the synthesis of CdS and ZnS nanoparticles (NPs) prepared in a basic aqueous medium using metal xanthate as the sulfur source. The structure, morphology, size distribution, optical band gap, and photocatalytic properties of the newly obtained nanomaterials were investigated by UV-Vis spectroscopy, X-ray diffraction, and transmission electron microscopy. The results show that both CdS and ZnS crystallized in cubic phase and formed NPs with average sizes of 7.0 and 4.2 nm for CdS and ZnS, respectively. A blue shift of UV-Vis absorbance band and higher energy band gap values were observed for both materials in comparison with their bulk counterparts, which is in accordance with the quantum confinement effect. The as-prepared nanomaterials were tested in visible-light driven photocatalytic decomposition of methylene blue (MB). After irradiation for 180 min, the degradation rate of MB with a concentration of 8 × 10(−6) mol/L mixed with a photocatalyst (CdS or ZnS, both 10 mg in 100 mL solution of MB) was found to be 72% and 61%, respectively. The CdS NPs showed better photocatalytic activity than ZnS, which could be explained by their lower energy band gap and thus the ability to absorb light more efficiently when activated by visible-light irradiation.
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spelling pubmed-68292292019-11-18 Preparation and Photocatalytic Properties of CdS and ZnS Nanomaterials Derived from Metal Xanthate Mintcheva, Neli Gicheva, Gospodinka Panayotova, Marinela Wunderlich, Wilfried Kuchmizhak, Aleksandr A. Kulinich, Sergei A. Materials (Basel) Article In this paper, we report a new, simple method for the synthesis of CdS and ZnS nanoparticles (NPs) prepared in a basic aqueous medium using metal xanthate as the sulfur source. The structure, morphology, size distribution, optical band gap, and photocatalytic properties of the newly obtained nanomaterials were investigated by UV-Vis spectroscopy, X-ray diffraction, and transmission electron microscopy. The results show that both CdS and ZnS crystallized in cubic phase and formed NPs with average sizes of 7.0 and 4.2 nm for CdS and ZnS, respectively. A blue shift of UV-Vis absorbance band and higher energy band gap values were observed for both materials in comparison with their bulk counterparts, which is in accordance with the quantum confinement effect. The as-prepared nanomaterials were tested in visible-light driven photocatalytic decomposition of methylene blue (MB). After irradiation for 180 min, the degradation rate of MB with a concentration of 8 × 10(−6) mol/L mixed with a photocatalyst (CdS or ZnS, both 10 mg in 100 mL solution of MB) was found to be 72% and 61%, respectively. The CdS NPs showed better photocatalytic activity than ZnS, which could be explained by their lower energy band gap and thus the ability to absorb light more efficiently when activated by visible-light irradiation. MDPI 2019-10-11 /pmc/articles/PMC6829229/ /pubmed/31614575 http://dx.doi.org/10.3390/ma12203313 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mintcheva, Neli
Gicheva, Gospodinka
Panayotova, Marinela
Wunderlich, Wilfried
Kuchmizhak, Aleksandr A.
Kulinich, Sergei A.
Preparation and Photocatalytic Properties of CdS and ZnS Nanomaterials Derived from Metal Xanthate
title Preparation and Photocatalytic Properties of CdS and ZnS Nanomaterials Derived from Metal Xanthate
title_full Preparation and Photocatalytic Properties of CdS and ZnS Nanomaterials Derived from Metal Xanthate
title_fullStr Preparation and Photocatalytic Properties of CdS and ZnS Nanomaterials Derived from Metal Xanthate
title_full_unstemmed Preparation and Photocatalytic Properties of CdS and ZnS Nanomaterials Derived from Metal Xanthate
title_short Preparation and Photocatalytic Properties of CdS and ZnS Nanomaterials Derived from Metal Xanthate
title_sort preparation and photocatalytic properties of cds and zns nanomaterials derived from metal xanthate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6829229/
https://www.ncbi.nlm.nih.gov/pubmed/31614575
http://dx.doi.org/10.3390/ma12203313
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