Interfacial charge dominating major active species and degradation pathways: An example of carbon based photocatalyst.
Interfacial charge dominating major active species and degradation pathways: An example of carbon based photocatalyst.
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DOI：
10.1016/j.jcis.2019.07.077
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发表时间：
2019-10
影响因子：
9.9
通讯作者：
Yuting Zhang;Zhurui Shen;Zekun Xin;Zhuofeng Hu;Huiming Ji
中科院分区：
文献类型：
--
作者：
Yuting Zhang;Zhurui Shen;Zekun Xin;Zhuofeng Hu;Huiming Ji
In this work, the chlorine-doped and undoped hydrothermal carbonation carbon (Cl-HTCC, HTCC) photocatalysts were used to study the correlation of their interfacial charge and photocatalytic performance. For degradation of aromatic dye, rhodamine B (RhB), Cl-HTCC manifests much better photocatalytic performance compared with that of undoped HTCC. Besides the slightly enhanced charge transfer brought, the Cl-HTCC showed more negatively interfacial charge and thus a stronger adsorption of positively charged RhB. This made the photogenerated holes (h+) directly react with the adsorbed RhB, which does not require the h+to produce hydroxyl radical (radical dotOH) and reduce its lost during the transformation, thus enhanced the performance of Cl-HTCC. While for undoped HTCC, it showed a weaker adsorption of RhB, and the photogenerated h+firstly reacted with H2O molecules to produceradical dotOH. Then, theradical dotOH can attack the RhB. Besides, the intermediates and the degradation pathways are also evaluated here via UPLC-MS. Results show that the interfacial charge also dominated the degradation pathways. This work provides a novel metal-free photocatalyst for environmental remediation and will inspire further efforts to enhance the photocatalytic performance by concerning interfacial conditions.
