BiOxCly/BiOmBrn/BiOpIq/GO quaternary composites: Syntheses and application of visible-light-driven photocatalytic activities.
BiOxCly/BiOmBrn/BiOpIq/GO quaternary composites: Syntheses and application of visible-light-driven photocatalytic activities.
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DOI：
10.1016/j.jcis.2019.02.067
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发表时间：
2019-05
影响因子：
9.9
通讯作者：
Ciao-Wei Siao;W. Lee;Yong-Ming Dai;W. Chung;Jiun-Ting Hung;P. Huang;Wan-Yu Lin;Chiing-Chang Chen-Chiing-Chang
中科院分区：
文献类型：
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作者：
Ciao-Wei Siao;W. Lee;Yong-Ming Dai;W. Chung;Jiun-Ting Hung;P. Huang;Wan-Yu Lin;Chiing-Chang Chen-Chiing-Chang
本文报道了大量氧化氯化铋/氧化溴化铋/氧化碘化铋/氧化石墨烯（BiOxCly/BiOmBrn/BiOpIq/GO）复合材料的制备。采用水热法合成了不同氧化石墨烯含量的光催化剂。采用FE-SEM、XRD、FE-TEM、UV-Vis-DRS、FT-IR、EPR、HR-XPS、PL和BET等手段对10个氧化卤化物铋复合材料进行了分离和表征。通过测定2-羟基苯甲酸（HBA）降解浓度，在可见光照射下测定了10种铋-氧化卤化物复合材料的光催化效率。研究结果表明,速率常数的HBA退化是BiOCl / BiOBr / BiOI /去 > Bi3O4Cl / Bi3O4Br / Bi4O5I2 /去 > Bi12O17Cl2 / Bi3O4Cl / Bi12O17Br2 / Bi7O9I3 /去 > Bi12O17Cl2 / BiOBr / BiOI /去 > Bi12O17Cl2 / Bi12O17Br2 / Bi7O9I3 / Bi5O7I /去 > Bi3O4Cl / BiOBr / Bi3O4Br / Bi4O5I2 > Bi3O4Cl / BiOBr BiOI > BiOCl / BiOBr BiOI > Bi12O17Cl2 / Bi5O7Br Bi5O7I > 走。BiOCl/BiOBr/BiOI/GO的最大速率常数为0.191 h−1，光催化效率是复合BiOCl/BiOBr/BiOI的8倍。我们还提出了一个光催化机制，证明o2自由基dot -， h±，dotOH和o2都是HBA降解所必需的。
Herein, the preparation of numerous bismuth oxychloride/bismuth oxybromide/bismuth oxyiodide/graphene oxide (BiOxCly/BiOmBrn/BiOpIq/GO) composites is reported. A facile hydrothermal method was employed to synthesize these photocatalysts, which had various GO contents. A total of 10 bismuth-oxyhalide composites were isolated and characterized using FE–SEM, XRD, FE–TEM, UV–Vis–DRS, FT–IR, EPR, HR–XPS, PL, and BET. The photocatalytic efficiencies of these 10 bismuth-oxyhalide composites were measured under visible-light irradiation by estimating the concentration of 2-hydroxybenzoic acid (HBA) degradation. The findings indicated that the rate constant order of the HBA degradations was BiOCl/BiOBr/BiOI/GO > Bi3O4Cl/Bi3O4Br/Bi4O5I2/GO > Bi12O17Cl2/Bi3O4Cl/Bi12O17Br2/ Bi7O9I3/GO > Bi12O17Cl2/BiOBr/BiOI/GO > Bi12O17Cl2/Bi12O17Br2/Bi7O9I3/Bi5O7I/GO > Bi3O4Cl/BiOBr/Bi3O4Br/Bi4O5I2> Bi3O4Cl/BiOBr/BiOI > BiOCl/BiOBr/BiOI > Bi12O17Cl2/Bi5O7Br/Bi5O7I > GO. A maximum rate constant of 0.191 h−1was reached for BiOCl/BiOBr/BiOI/GO, providing photocatalytic efficiency that was eight times higher than that of composite BiOCl/BiOBr/BiOI. We also proposed a photocatalytic mechanism demonstrating that O2radical dot−, h±,radical dotOH, and1O2are all essential for HBA degradation.