Bi2WO6/Nb2CTx MXene hybrid nanosheets with enhanced visible-light-driven photocatalytic activity for organic pollutants degradation

By Ce Cui, R. Guo, Hongyan Xiao, Erhui Ren, Qingshuang Song, Cheng Xiang, Xiaoxu Lai, J. Lan, Shouxiang Jiang. 2020

154 citations recorded by the source corpus.

Abstract The 2D/2D hybrid photocatalyst of ultrathin Bi2WO6/Nb2CTx hybrid nanosheets was synthesized via a facile hydrothermal process. The photocatalytic performance of Bi2WO6/Nb2CTx hybrid nanosheets for the degradation of rhodamine B (RhB), methylene blue (MB) and tetracycline hydrochloride (TC-HCl) were investigated. The results showed that the Nb2CTx nanosheets greatly improved the separation efficiency of photogenerated carriers and the photocatalytic activity of Bi2WO6. Compared with Bi2WO6, Bi2WO6/Nb2CTx hybrid nanosheets photocatalysts exhibited excellent photodegradation efficiency for RhB (99.8%), MB (92.7%) and TC-HCl (83.1%), respectively. The photodegradation rate constants of Bi2WO6 coupled with 2 wt% Nb2CTx for RhB and MB were 0.072 min−1 and 0.0285 min−1, which were 2.8 times and 2 times as high as that of pristine Bi2WO6, respectively. In addition, the photodegradation rate constant of Bi2WO6 coupled with 2 wt% Nb2CTx for TC-HCl reaches 0.0171 min−1. This study provided an efficient photocatalyst with 2D/2D structures and demonstrated that 2D Nb2CTx is a promising co-catalyst to improve the photodegradation performance of photocatalysts.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/1daf63859ae893231e07fa52dd1f2299c431ac0f