Stepwise blossoming of BiOBr nanoplate-assembled microflowers and their visible-light photocatalytic activities
Stepwise blossoming of BiOBr nanoplate-assembled microflowers and their visible-light photocatalytic activities
复制标题
BiOBr纳米板组装微花的逐步开花及其可见光光催化活性
DOI：
10.1039/c0ce00955e
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发表时间：
2011-04-01
期刊：
影响因子：
3.1
通讯作者：
Wu, Qingsheng
中科院分区：
文献类型：
--
作者：
Chen, Yijun;Wen, Ming;Wu, Qingsheng
通过表面活性剂调节和时间控制，在溶剂热系统中获得了纳米板组装的 BiOBr 微花从芽到开花结构的逐步开花，平均直径为 1 至 3.5 μm，纳米板厚度为 25 至 120 nm。上述BiOBr结构对亚甲基蓝（MB）溶液的降解表现出优异的可见光光催化活性，其中反应24小时的结构具有最好的光催化活性。微晶尺寸（R）、比表面积（S）和光催化活性（D）之间建立了定量关系。方程 D = 15(R)(2/5)(S)(1/5) 提供了结晶度主导的光催化活性的定量表征。
Stepwise blossoming of nanoplate-assembled BiOBr microflowers from bud to blossom structures with average diameters from 1 to 3.5 mu m and nanoplate thicknesses from 25 to 120 nm is obtained in a solvothermal system through surfactant modulation and time control. The above BiOBr structures exhibit excellent visible-light photocatalytic activity toward degradation of methylene blue (MB) solution, among which the structure from a 24 h reaction gives the best photocatalytic activity. A quantitative relationship is established among crystallite size (R), specific surface area (S) and photocatalytic activity (D). The equation D = 15(R)(2/5)(S)(1/5) offers a quantitative characterization of crystallinity-dominated photocatalytic activity.