Sonochemical synthesis of CaBi6O10 nanoplates: photocatalytic degradation of organic pollutants (ciprofloxacin and methylene blue) and oxidizing species study (h+, OH·, H2O2 and O2•‐)
Sonochemical synthesis of CaBi6O10 nanoplates: photocatalytic degradation of organic pollutants (ciprofloxacin and methylene blue) and oxidizing species study (h+, OH·, H2O2 and O2•‐)
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DOI：
10.1002/jctb.5252
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发表时间：
2017-07
影响因子：
3.4
通讯作者：
T. Montalvo‐Herrera;D. Sánchez-Martínez;L. Torres-Martínez
中科院分区：
文献类型：
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作者：
T. Montalvo‐Herrera;D. Sánchez-Martínez;L. Torres-Martínez
背景利用大功率超声处理装置，采用声化学方法合成了CaBi6O10纳米片。同时，采用浸渍-煅烧法制备了CaBi6O10，比较了不同合成方法对光催化剂光催化活性的影响。此外，还考察了h+、OH•、H2O2和O2•-等氧化物质在光催化降解环丙沙星（CPFX）和亚甲基蓝（MB）过程中的作用。结果声化学合成的样品为厚度约50 nm、长度约1.5µm的纳米片。此外，样品表现出最佳的光催化活性（即具有最大表面积和片状形态的样品），降解CPFX的56%和MB的67%。参与CPFX降解的主要物质是OH·自由基，参与MB降解的主要物质是H2O2。结论超声化学法制备的CaBi6O10纳米片对CPFX和MB具有最佳的光催化活性，这主要与纳米片的形貌有关。此外，还观察到参与CPFX降解的主要物种是OH·自由基和MB、H2O2的降解。©2017化学工业学会
BACKGROUND CaBi6O10 nanoplates were synthesized by a sonochemical method using a high-power ultrasonic processor. Also, the CaBi6O10 was synthesized by an impregnation-calcination method in order to compare the effect of the synthesis method on the photocatalytic activity of the photocatalyst. In addition, the role of the oxidizing species such as h+, OH•, H2O2 and O2•- was evaluated during the photocatalytic degradation of ciprofloxacin (CPFX) and methylene blue (MB). RESULTS The sample synthesized sonochemically showed a morphology of nanoplates with a thickness around 50 nm and length 1.5 µm. Also, the sample showed the best photocatalytic activity (i.e. the sample with the highest surface area and a plate-like morphology), degrading CPFX by 56% and MB by 67%. The main species involved in the degradation of CPFX were the OH· radicals, and in the degradation of MB it was H2O2. CONCLUSIONS CaBi6O10 nanoplates were prepared successfully by a sonochemical method, showing the best photocatalytic activity in the degradation of CPFX and MB, mainly attributed to the morphology of the nanoplates. In addition, it was observed that the main species involved in the degradation of CPFX were the OH· radicals and in the degradation of MB, H2O2. © 2017 Society of Chemical Industry