Non-additional carbon source one-step synthesis of Bi2O2CO3-based ternary composite for efficient Z-scheme photocatalysis

Yuanyuan Zhang; Lili Wang; Fengying Dong; Qiao Chen; Haiyan Jiang; Mei Xu; Jinsheng Shi

doi:10.1016/j.jcis.2018.10.094

Non-additional carbon source one-step synthesis of Bi₂O₂CO₃-based ternary composite for efficient Z-scheme photocatalysis

J Colloid Interface Sci. 2019 Feb 15:536:575-585. doi: 10.1016/j.jcis.2018.10.094. Epub 2018 Oct 30.

Authors

Yuanyuan Zhang¹, Lili Wang¹, Fengying Dong¹, Qiao Chen¹, Haiyan Jiang¹, Mei Xu¹, Jinsheng Shi²

Affiliations

¹ Department of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, PR China.
² Department of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, PR China. Electronic address: jsshiqn@aliyun.com.

PMID: 30390583
DOI: 10.1016/j.jcis.2018.10.094

Abstract

Bi₂O₂CO₃-based ternary composite materials are generally synthesized by two- or multi-step method and special precursor of CO₃^2- is usually utilized in synthesis of Bi₂O₂CO₃, which are time-consuming, laborious and relatively costly. In this paper, for the first time, a facile one-step solvothermal method is used to fabricate Z-scheme Bi₂O₂CO₃/Bi/Bi₂WO₆ ternary composites. Interestingly, ethylene glycol not only acts as solvent for the reaction system, but also reduced Bi³⁺ into metallic Bi and itself is oxidized to CO₃^2-, which could construct Bi₂O₂CO₃. On this occasion, Bi₂O₂CO₃/Bi/Bi₂WO₆ ternary composites are obtained after one-step method. High resolution transmission electron microscopy clearly reveals each component in composites. The as-prepared samples could be applied in various photocatalytic activities. Under solar light irradiation, Bi₂O₂CO₃/Bi/Bi₂WO₆ composites exhibited prominent photodegradation performances for both ciprofloxacin and bisphenol A. Meanwhile, these composites could also be used in efficient photoreduction of CO₂. The efficient photocatalytic activity could be mainly ascribed to Z-scheme electron transfer mechanism in ternary composites, which is determined by surface redox reactions, active species trapping experiment, electron spin resonance spectrum.

Keywords: Bi(2)O(2)CO(3), Z-scheme mechanism; Non-additional carbon source; One-step synthesis; Photocatalysis.