Study on the photocatalysis of F–S co-doped TiO2 prepared using solvothermal method
Study on the photocatalysis of F–S co-doped TiO2 prepared using solvothermal method
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DOI：
10.1016/j.apcatb.2010.03.004
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发表时间：
2010-06
影响因子：
22.1
通讯作者：
Guidong Yang;Zheng Jiang;Huahong Shi;M. Jones;T. Xiao;P. Edwards;Zifeng Yan
中科院分区：
文献类型：
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作者：
Guidong Yang;Zheng Jiang;Huahong Shi;M. Jones;T. Xiao;P. Edwards;Zifeng Yan
采用低温溶剂热法制备了氟硫（F-S）共掺杂TiO2材料，并通过亚甲基蓝的可见光光催化降解测试了其催化活性。为了进行比较，还制备了单元素掺杂样品，例如 S 和 F 掺杂 TiO2，并在相同条件下进行了测试。表征结果表明，F-S共掺杂TiO2在可见光照射下比单掺杂F和S掺杂样品具有更高的光催化活性。据信，共掺杂在氧化物的带隙中产生局域态并产生活性表面氧空位，这两者负责可见光吸收和促进电子从局域态到导带。电子顺磁共振表征揭示了超氧自由基（O2−）的存在，这可能是亚甲基蓝在可见光下光降解的主要原因。
Fluorine–sulfur (F–S) co-doped TiO2materials have been prepared using low-temperature solvothermal method, and tested for catalytic activity by the visible light photocatalytic degradation of the Methylene Blue. For comparison, the mono-elemental doped samples, e.g., S- and F-doped TiO2have also been prepared and tested under the same conditions. The characterization results showed that F–S co-doped TiO2has a higher photocatalytic activity than that of mono-doped F- and S-doped samples under visible light irradiation. It is believed that the co-doping gives rise to a localized state in the band gap of the oxide and creates active surface oxygen vacancies, both which are responsible for visible light absorption and the promotion of electrons from the localized states to the conduction band. Characterization by electron paramagnetic resonance revealed the presence of a superoxide radical (O2−) which may be mainly responsible for photodegradation of Methylene Blue under visible light.