Photodegradation of rhodamine B under visible light by bimetal codoped TiO2 nanocrystals.
Photodegradation of rhodamine B under visible light by bimetal codoped TiO2 nanocrystals.
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DOI：
10.1016/j.jhazmat.2008.08.041
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发表时间：
2009-05
影响因子：
13.6
通讯作者：
Zhuyi Wang;Cheng Chen;Fengqing Wu;Bo Zou;Meng Zhao;Jinxing Wang;Caihui Feng
中科院分区：
文献类型：
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作者：
Zhuyi Wang;Cheng Chen;Fengqing Wu;Bo Zou;Meng Zhao;Jinxing Wang;Caihui Feng
为了寻找在可见光下工作的高效光催化剂，我们研究了金属离子（Bi/Co、Fe/Co）共掺杂对硬脂酸凝胶法制备的TiO2光催化活性的影响。紫外可见光谱表明，Co掺杂增强了TiO2在可见光下的吸光度，Bi/Co共掺杂TiO2比Fe/Co共掺杂TiO2表现出更高的吸光度。检查了基于制备的样品对20mg/l罗丹明B溶液的光降解的光反应。结果表明，Fe(0.1%)/Co(0.4%)共掺杂TiO2在可见光下具有最高的光活性，但其对可见光的吸收率较低，表明其光活性不仅受益于吸收率，还与两种掺杂剂的协同效应有关。
In the search for efficient photocatalysts working under visible light, we have investigated the effect of metal ions (Bi/Co, Fe/Co) codoping on the photocatalytic activity of TiO2prepared by stearic acid gel method. UV–vis spectra revealed that doped Co enhanced the absorbency of TiO2under visible light, and Bi/Co codoped TiO2showed higher absorbance than Fe/Co codoped TiO2. The photoreaction based on the prepared samples for photodegradation of 20mg/l rhodamine B solution was examined. The results showed that Fe(0.1%)/Co(0.4%) codoped TiO2had the highest photoactivity among all as-prepared samples under visible light, though less absorbency of visible light, indicating that the photoactivity not only benefits from absorbency but also relates to the cooperative effect of the two dopants.