光催化
双酚A
纳米复合材料
材料科学
降级(电信)
反应速率常数
热液循环
光致发光
吸附
兴奋剂
化学工程
可见光谱
光化学
纳米技术
化学
催化作用
动力学
物理化学
有机化学
复合材料
光电子学
电信
物理
工程类
量子力学
计算机科学
环氧树脂
作者
Qiao Wang,Yiting Cao,Yuemi Yu,Chao Zhang,Jiahao Huang,Guoshuai Liu,Xuedong Zhang,Wenjun Wang,Hale Özgün,Mustafa Evren Erşahin,Wei Wang
出处
期刊:Chemosphere
[Elsevier]
日期:2022-12-01
卷期号:308: 136276-136276
被引量:10
标识
DOI:10.1016/j.chemosphere.2022.136276
摘要
Visible-light (VL) photocatalysis has been regarded as an intriguing technology for the control of persistent environmental pollutants. In this study, the novel homogeneous Co doped-Bi/BiOBr nanocomposites (CB-X) were prepared via a facile one-step hydrothermal method, featured with a uniform 0D Bi nanodots distribution on 2D Co-doped BiOBr nanosheets, and the photocatalytic performance was evaluated by decomposing the BPA as a prototype contaminant. The degradation experiment indicated that the optimal CB-2 nanocomposite exhibited the best photocatalytic activity with a 94% removal efficiency of BPA under the VL irradiation of 30 min; And the corresponding apparent rate constant (k) was as high as 0.107 min−1, which was 10.7 times greater than that of Bi/BiOBr (0.010 min−1). Benefiting from the modulation effect of Co-doping on the intrinsic electron configuration of Bi/BiOBr, the elevated VL adsorption capacity and accelerated h+/e− pairs separation rate were achieved, which were evidenced by photoluminescence (PL) spectroscopy, photo-electrochemical measurements and density functional theory (DFT) calculation. Moreover, the major reactive species in CB-X/VL system were uncovered to be •O2− and 1O2, whereas •OH and h+ presented a secondary contribution in the BPA elimination. Finally, the possible photocatalytic mechanism involved in CB-X nanocomposites and BPA degradation pathways were proposed on the basis of the various intermediates and products detected by LC-MS/MS.
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