Journal
POWDER TECHNOLOGY
Volume 301, Issue -, Pages 1085-1091Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.powtec.2016.07.058
Keywords
ZnS; Homogeneous precipitation; Semiconductors; Photoactivity activity
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Funding
- National Natural Science Foundation of China [51541204]
- Natural Science Foundation of Education Department of Shaanxi Provincial Government [15JK1106]
- Certificate of China Postdoctoral Science Foundation [2016M592737]
- Industrial science and technology research project in Shaanxi province [2016GY-199]
- Doctoral Starting up Foundation of Shaanxi University of Science Technology [BJ12-12]
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ZnS nano-microcrystallites with different size were controllably synthesized by a facile homogeneous precipitation method. The products were characterized by X-ray diffraction, field emission scanning electron microscopy, high resolution transmission electron microscopy, N-2-sorption BET surface area and UV-vis diffused reflectance spectra for their morphology, size and optical performance. Results show that the crystallinity and size of the samples strongly depend on the Zn/S molar ratio of the precursor solution. Moreover, the electronic band structures of all samples were investigated relatively from the sides of theory and practice. The photocatalytic performances of the as-prepared ZnS samples were evaluated towards the removal of MO upon UV-light irradiation. The results indicate that the ZnS nanoparticles prepared at the Zn/S molar ratio of 1:2 exhibited the highest photocatalytic activity with the degradation ratio of 96.8% in 24 min, which was mainly attributed to the high separation efficiency of electron and hole pairs and large surface area. With the help of scavengers, center dot O-2(-) was proved to be the main reactive species during the degradation. (C) 2016 Published by Elsevier B.V.
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