Facile synthesis of Ni-doping Bi2WO6 nano-sheets with enhanced adsorptive and visible-light photocatalytic performances

• Published in: Journal of materials science Vol. 53; no. 10; pp. 7657 - 7671
• Main Authors: Xiang, Lei, Chen, Lei, Mo, Ce-Hui, Zheng, Lian-Ming, Yu, Zhong-Xiong, Li, Yan-Wen, Cai, Quan-Ying, Li, Hui, Yang, Wei-Dong, Zhou, Dong-Mei, Wong, Ming-Hung
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.05.2018; Springer Nature B.V
• Subjects: Adsorptivity; Bismuth compounds; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Crystallites; Crystallography and Scattering Methods; Doping; Electron traps; Energy Materials; Fourier transforms; Light irradiation; Materials Science; Nickel; Performance degradation; Photocatalysis; Photodegradation; Photoelectrons; Polymer Sciences; Raman spectroscopy; Rhodamine; Sheets; Solid Mechanics; Spectrum analysis; Surface chemistry; Tungstates; Bi2WO6 Sample; Surface Electrical Properties; Photocatalytic Activity; Bi 2WO; Photocatalytic Performance
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-018-2064-3

Bi 2 WO 6 nano-sheets doped with various amounts of nickel (Ni) were prepared by hydrothermal method, and their microstructure and photocatalytic performance for degrading rhodamine B (RhB) and ciprofloxacin (CIP) under simulated solar light irradiation were investigated. The effective incorporation of Ni atoms in Bi 2 WO 6 was confirmed by energy-dispersive spectroscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. Ni-doping decreased the crystallite size of Bi 2 WO 6 and improved its specific surface area and surface electrical property. Furthermore, Ni atoms acting as electron traps facilitated the separation of photo electron–hole pairs. Accordingly, both adsorptive and photocatalytic performances of the Ni–Bi 2 WO 6 were improved compared to undoping Bi 2 WO 6 . The 0.15-Ni–Bi 2 WO 6 (Ni/W, molar ratio) displayed the best adsorptive and photocatalytic activities among the Bi 2 WO 6 samples doped with various elements. The photogenerated holes were the predominant reactive species responsible for the photodegradation of RhB by 0.15-Ni–Bi 2 WO 6 . Solution pH could influence the adsorptive and photocatalytic performances of 0.15-Ni–Bi 2 WO 6 with the best performances under acidic condition.