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Efficient photocatalytic degradation of commercial pharmaceutical contaminants of carbamazepine using BiOBr nanosheets under visible-light irradiation
Materials Science in Semiconductor Processing ( IF 4.1 ) Pub Date : 2021-09-17 , DOI: 10.1016/j.mssp.2021.106207
Shuo Xu 1 , Xiaoya Gao 2 , Wenfeng Xu 1 , Pengfei Jin 1 , Yongmei Kuang 1
Affiliation  

Removing pharmaceutical contaminants is the growing concerns for the public people. Herein, commercial pharmaceutical drug of carbamazepine (CBZ) was degraded by photocatalysis. Highly efficient visible-light-driven BiOBr nanosheets were fabricated using water mediated hydrolysis route with the assistment of tetra (n-butyl) ammonium hydroxide (TBAOH). In particular, BiOBr nanosheets prepared with 0.1 mmol TBAOH (0.1 mmol TBAOH + KBr) performed the optimum photocatalytic degradation activity, enabling 88.7% removals of CBZ after 20 min irradiation under visible-light. Furthermore, 0.1 mmol TBAOH + KBr BiOBr nanosheets displayed fast degradation kinetics, with a degradation rate constant of 6.2 times than BiOBr prepared without TBAOH (0 mmol TBAOH + KBr). The enhanced photocatalytic activity was originated from the improvement of adsorption performance, photo absorption, and separation rate of photoinduced electron-hole pair. The major active species participated in CBZ degradation were proved to be h+, •O2-, and •OH using quenching experiments. The present results can throw light on the development of visible-light-driven photocatalyst with considerable catalytic activity for removing pharmaceutical contaminants.



中文翻译:

在可见光照射下使用 BiOBr 纳米片有效光催化降解卡马西平的商业药物污染物

去除药物污染物是公众日益关注的问题。在此,卡马西平(CBZ)的商业药物通过光催化降解。在四(正丁基)氢氧化铵(TBAOH)的辅助下,使用水介导的水解路线制造了高效的可见光驱动的 BiOBr 纳米片。特别是,用 0.1 mmol TBAOH (0.1 mmol TBAOH + KBr) 制备的 BiOBr 纳米片表现出最佳的光催化降解活性,在可见光照射 20 分钟后能够去除 88.7% 的 CBZ。此外,0.1 mmol TBAOH + KBr BiOBr 纳米片显示出快速降解动力学,其降解速率常数是不使用 TBAOH 制备的 BiOBr(0 mmol TBAOH + KBr)的 6.2 倍。光催化活性的提高源于光致电子-空穴对的吸附性能、光吸收和分离率的提高。参与CBZ降解的主要活性物种被证明是h +、•O 2 -和•OH 使用淬火实验。目前的结果可以为开发具有显着催化活性的可见光驱动光催化剂用于去除药物污染物提供启示。

更新日期:2021-09-17
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