Effect of Fluorination on Photocatalytic Degradation of Rhodamine B over In(OH)ySz: Promotion or Suppression?
Effect of Fluorination on Photocatalytic Degradation of Rhodamine B over In(OH)ySz: Promotion or Suppression?
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DOI：
10.1021/jp109578g
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发表时间：
2011-01
影响因子：
3.7
通讯作者：
Shunwei Hu;Jia Zhu;Ling Wu;Xuxu Wang;Ping Liu;Yongfan Zhang;Z. Li
中科院分区：
文献类型：
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作者：
Shunwei Hu;Jia Zhu;Ling Wu;Xuxu Wang;Ping Liu;Yongfan Zhang;Z. Li
采用水热法合成了氟化In（OH）ySz固溶体。氟化In（OH）ySz固溶体对罗丹明B（RhB）的光催化降解研究表明，氟化In（OH）ySz促进了RhB的脱乙基反应，同时抑制了RhB的矿化速率.为了阐明氟化In（OH）ySz对RhB光催化降解的两个过程（脱乙基和矿化）的相反影响，研究了氟化In（OH）ySz对RhB的吸附，并对氟化In（OH）ySz的电子结构进行了研究.结果表明，参与RhB脱乙基化和矿化的主要活性物种不同，空穴直接氧化导致RhB脱乙基化，而参与RhB矿化的主要活性物种不同。
Fluorinated In(OH)ySz solid solutions were synthesized via a hydrothermal method. The photocatalytic degradation of rhodamine B (RhB) over the fluorinated In(OH)ySz solid solutions revealed that the process of the de-ethylation of RhB was enhanced, while in the meantime, the rate of the mineralization of RhB was suppressed when In(OH)ySz was fluorinated. To elucidate the opposite effects of fluorination on the two processes of photocatalytic degradation of RhB (de-ethylation and mineralization) over In(OH)ySz, the adsorption of RhB over In(OH)ySz with and without fluorination, the active species involved in the de-ethylation and the mineralization of RhB, were investigated, and the electronic structure of fluorinated In(OH)ySz was studied. The results indicated that the major active species involved in the de-ethylation and the mineralization of RhB are different, that is, the hole direct oxidation leads to the de-ethylation of RhB, while the major active species responsible for the mineralization of RhB ...