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- Title
Efficient adsorption and photocatalytic degradation of Congo red onto hydrothermally synthesized NiS nanoparticles.
- Authors
Guo, Hongxu; Ke, Yingchang; Wang, Dongfeng; Lin, Kaili; Shen, Ruxiang; Chen, Jianhua; Weng, Wen
- Abstract
NiS nanoparticles (NiS NPs) have been hydrothermally prepared and characterized by the methods of X-ray diffraction, scanning electronic microscope, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectra, photoluminescence, and thermogravimetric analysis. NiS NPs exhibit fast adsorption in the removal of Congo red (CR) in aqueous solution, in which the pseudo-second-order model was the best to describe the adsorption kinetics, and the intraparticle diffusion was not only the rate-limiting step. The NiS NPs also exhibit efficient photocatalytic activity in the degradation of CR under visible-light irradiation, in which the 30 mg/L CR was almost completely degraded after illumination during 210 min. The •OH radicals in the process of photocatalytic degradation were observed by fluorescence technique.
- Publication
Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2013, Vol 15, Issue 3, p1475
- ISSN
1388-0764
- Publication type
Journal Article
- DOI
10.1007/s11051-013-1475-y