7787-57-7Relevant articles and documents
Ternary-component reduced graphene oxide aerogel constructed by g-C3N4/BiOBr heterojunction and graphene oxide with enhanced photocatalytic performance
Yu, Xue,Wu, Peiwen,Qi, Caixia,Shi, Junjie,Feng, Lijuan,Li, Chunhu,Wang, Liang
, p. 162 - 170 (2017)
Tremendous demands for photocatalysts with high chemical activity and stability, low cost and capability of response to visible-light have stimulated intensive research on developing versatile materials with special photocatalytic applications. Here we report a novel g-C3N4/BiOBr-RGO aerogel ternary-component heterojunction photocatalyst for degradation of RhB under visible light irradiation. As a result of synergistic effect of the g-C3N4, BiOBr and RGO, the hybrid photocatalysts exhibit better activity than the single component catalysts (pure g-C3N4, BiOBr) and bi-component catalysts (g-C3N4/BiOBr) in the same time period (60 min). The enhanced photocatalytic performance originates from a novel nanoarchitecture in which BiOBr exposed more active plane and RGO worked as a conductive support further improved the photogenerated charge separation. Moreover, due to the 3D structure of RGO after reaction the photocatalysts can be easily removed from the treated solution and reused, which opens up a way for the recycling applications of catalysts in aqueous reaction systems.
Constructing Z-scheme charge separation in 2D layered porous BiOBr/graphitic C3N4 nanosheets nanojunction with enhanced photocatalytic activity
Liu, Chao,Wu, Qisheng,Ji, Mingwei,Zhu, Huajun,Hou, Haijun,Yang, Qihang,Jiang, Cuifeng,Wang, JingJing,Tian, Liang,Chen, Jing,Hou, Wenhua
, p. 1121 - 1131 (2017)
In the present work, a series of layered BiOBr/g-C3N4 heterojunction photocatalysts were prepared via a simple reflux process, and their photocatalytic performance was investigated by the degradation of rhodamine B (RhB) and bisphenol A (BPA) under visible light irradiation. It was found that BiOBr nanoplates were deposited on the external surface of g-C3N4nanosheets (CNNS) and the tightly contacted interface was formed between two components, giving rise to a 2D porous layered heterojunction structure with a high specific area. It was found that BiOBr nanoplates coupled with the proper amount of CNNS exhibited an excellent photocatalytic performance due to the combined effects of layered heterojunction, high specific surface area and porous structure, which lead to the high efficiency of light harvesting and charge separation. The active species of [rad]OH is the most crucial one while h+ and O2[rad]?contributed to a lesser extent in RhB and BPA photocatalytic degradation. Based on the direct evidence of the formed [rad]OH, O2[rad]? and h+ active species detected by active species capture experiment and ESR spectra, a Z-scheme photocatalytic mechanism was proposed for the charge separation. The present work may provide an insight for designing novel layered Z-scheme heterojunction photocatalysts with a high performance.
Efficient separation of photogenerated electron-hole pairs by the combination of a heterolayered structure and internal polar field in pyroelectric BiOIO3 nanoplates
Wang, Wenjun,Huang, Baibiao,Ma, Xiangchao,Wang, Zeyan,Qin, Xiaoyan,Zhang, Xiaoyang,Dai, Ying,Whangbo, Myung-Hwan
, p. 14777 - 14780 (2013)
Electrify your chemistry! Pyroelectric heterolayered BiOIO3 nanoplates efficiently separate photogenerated electron-hole pairs due to the combined effect of their heterolayered structure and internal polar field (see scheme). Pyroelectric BiOIO3 nanoplates, synthesized by a simple hydrothermal method, were found to possess a superior photocatalytic activity under UV irradiation. Copyright
Core-shell Cd0.2Zn0.8S@BiOX (X = Cl, Br and I) microspheres: A family of hetero-structured catalysts with adjustable bandgaps, enhanced stability and photocatalytic performance under visible light irradiation
Zhou, Yannan,Wen, Ting,Chang, Binbin,Yang, Baocheng,Wang, Yonggang
, p. 13709 - 13716 (2016/09/09)
Heterostructures consisting of two semiconductors have merited considerable attention in photocatalytic applications due to synergistic effects in complex redox processes. The incorporation of solid solutions into such architectures can further offer extra variability to control the bandgap. In this study, we report the fabrication of a series of core-shell Cd0.2Zn0.8S@BiOX (X = Cl, Br and I) microspheres via a solvothermal route that lead to enhanced photocatalytic performance under visible light irradiation. By optimizing the synthesis conditions, uniform and porous Cd0.2Zn0.8S@BiOX microspheres were achieved. The products were thoroughly characterized by X-ray diffraction studies, scanning electron microscopy, transmission electron microscopy, photoluminescence studies, absorption measurements and the photodegradation of RhB. Remarkably, the electronic structures of Cd0.2Zn0.8S@BiOX composites can be continuously tuned by varying the composition of BiOX to achieve the best catalytic performance under visible light irradiation. Finally, this greatly enhanced visible-light-driven photocatalytic efficiency was observed in the optimized Cd0.2Zn0.8S@BiOI composites when compared to their single-component counterparts, which may be attributed to increased light absorption and improved electron-hole separation. The photocatalytic mechanism has also been proposed based on the experimental evidences and the theoretical band positions of Cd0.2Zn0.8S@BiOI.
