Hierarchically porous BiOBr/ZnAl1.8Fe0.2O4 and its excellent adsorption and photocatalysis activity
Hierarchically porous BiOBr/ZnAl1.8Fe0.2O4 and its excellent adsorption and photocatalysis activity
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多级孔BiOBr/ZnAl1.8Fe0.2O4及其优异的吸附和光催化活性
DOI：
10.1016/j.materresbull.2018.10.006
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发表时间：
2019-02
影响因子：
5.4
通讯作者：
Guo Chunyan
中科院分区：
文献类型：
--
作者：
Bing Xingmei;Jian Xinying;Chu Jinghui;Li Jia;Guo Chunyan
本文报道了一种以薄纸为模板，高效、绿色地合成新型二维BiOBr/ znal1.8 fe0.2o4异质结光催化剂的方法。制备的样品由相互穿插形成二维结构的微纤维组成，每个微纤维由BiOBr微球和由层状双氢氧化物前体衍生的znal1.8 fe0.2 o4纳米颗粒组装而成。所得样品在去除水中的抗生素和阴离子染料方面表现出较高的吸附能力和良好的光催化活性。BiOBr/ znal1.8 fe0.2 2o4对刚果红（CR）和强力霉素（DC）的最大吸附量分别为210.5 mg g−1和227.4 mg g−1，准二级动力学模型较好地描述了吸附过程。由于其较高的电荷分离率、层次化多孔形态和协同吸附-光催化效应，合成的样品在模拟阳光照射下对低浓度CR和DC具有优异的光催化活性。
Herein, we reported an efficient and green approach to synthesize a novel 2D BiOBr/ZnAl1.8Fe0.2O4heterojunction photocatalysts by using tissue paper as template. The as-prepared sample was composed of microfibers interspersed with each other to form 2D structure, and each microfiber was assembled by BiOBr microspheres and ZnAl1.8Fe0.2O4nanoparticles derived from layered double hydroxides precursors. The obtained samples exhibited both high adsorption capacity and superior photocatalytic activity in removal of antibiotics and anionic dyes from water. The maximum adsorption capacities of BiOBr/ZnAl1.8Fe0.2O4towards Congo Red (CR) and Doxycycline (DC) were 210.5 and 227.4 mg g−1, respectively, and the pseudo-second order kinetic model describes the adsorption process well. The as-synthesized samples also exhibited superior photocatalytic activity toward low concentration of CR and DC under simulated sunlight irradiation thanks to its high charge separation ratio, hierarchically porous morphology and synergic adsorption-photocatalysis effect.
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