Facet synergy dominant Z-scheme transition in BiOCl with enhanced 1O2 generation

• Published in: Chemosphere (Oxford) Vol. 307; p. 135663
• Main Authors: Guan, Chongshang, Hou, Tian, Nie, Wuyang, Zhang, Qian, Duan, Libing, Zhao, Xiaoru
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2022
• Subjects: 1O2; BiOCl; Facet synergy; Self-assembling; Z-Scheme; Z-Scheme; BiOCl; Facet synergy; 1O2; Self-assembling
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2022.135663

BiOCl powders with different morphology were obtained through self-assembling. Their photocatalytic performance was tested through degradation of organic dye and mechanism of photocatalytic for obtained samples were investigated. Relevant characterization demonstrated that facet synergy was a main reason of photocatalytic performance promotion due to changed facet exposure and proportion under self-assembling. Theory and experimental analysis manifested that synergistic facet stimulated Z scheme transition in samples with lower (001) facet proportion, which provided favorable condition of 1O2 generation and simultaneously generated prominent charge separation. This work unveiled the facet synergy dominant photocatalytic performance improvement in self-assembling system of BiOCl and verified decisive role of facet proportion in constructing Z-scheme facet junction, which also prompted possibility of improving 1O2 generation through facet engineering under self-assembling. [Display omitted] •Self-assembling could trigger facet synergy on obtained samples, dominating the photocatalytic process.•Facet proportion is a decisive factor in facet junction and only weak enough (001) facet orientation would stimulate Z-scheme junction.•Z-scheme transition enhanced 1O2 generation due to exciton generation improvement.