Hierarchical architectures of bismuth molybdate nanosheets onto nickel titanate nanofibers: Facile synthesis and efficient photocatalytic removal of tetracycline hydrochloride.

Author(s) Li, S.; Hu, S.; Jiang, W.; Liu, Y.; Zhou, Y.; Liu, Y.; Mo, L.
Journal J Colloid Interface Sci
Date Published 2018 Jul 01

A huge challenge in the field of pollutant removal is the scarcity of visible-light-driven (VLD) photocatalysts that are efficient, stable, easily recyclable and capable of mineralizing organic pollutants. In this regard, a novel hierarchical architecture of BiMoO nanosheets onto NiTiO nanofibers for tetracycline hydrochloride (TC) removal was rationally designed and fabricated via a facile approach. In this heterojunction system, highly homogeneous-distributed BiMoO nanosheets were anchored on electrospun NiTiO nanofibers, endowing the heterojunction with compact interfacial contact. By virtue of the favorable interfacial contact and matched band alignment, promoted suppression of photo-generated electron-hole recombination is achieved in BiMoO/NiTiO system, as confirmed by photoluminescence measurement. As a result, the heterojunction with BiMoO/NiTiO molar ratio of 1:1 exhibits an outstanding VLD photocatalytic activity and good stability for tetracycline hydrochloride (TC) degradation. The photodegradation rate constant (k) is 26.0, 5.4 or 3.7 folds higher than that of pristine NiTiO, BiMoO, or the mechanical mixture (20.2 wt% NiTiO + 79.8 wt% BiMoO). The holes and superoxide radicals are detected as the dominant active species responsible for TC removal. Moreover, this work reports an efficient VLD photocatalyst for TC removal and will open up new insights into the design of novel fiber-shaped VLD heterojunction photocatalyts for environment remediation.

DOI 10.1016/j.jcis.2018.03.033
ISSN 1095-7103
Citation J Colloid Interface Sci. 2018;521:4249.

Related Applications, Forms & Industries