Photoinduced degradation of organic dye over LiBiO_3 under illumination of white fluorescent light
Photoinduced degradation of organic dye over LiBiO_3 under illumination of white fluorescent light
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DOI：
10.1557/jmr.2010.0006
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发表时间：
2010-01
影响因子：
2.7
通讯作者：
N. Kikugawa;Li-qin Yang;Takehiko Matsumoto;Jinhua Ye
中科院分区：
文献类型：
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作者：
N. Kikugawa;Li-qin Yang;Takehiko Matsumoto;Jinhua Ye
我们报道了半导体LiBiO_3在常规白色荧光灯照射下的染料降解效应。LiBiO_3的吸收光谱展宽很平滑，吸收边穿透到730 nm左右，对可见光有很宽的吸收范围。结果表明，标准染料亚甲基蓝溶液在光照4h后可完全降解.此外，总有机碳的值下降了70%，在脱色的溶液中，表明原来的亚甲基蓝的分子形式被矿化有效地无机片段的光诱导氧化效应。此外，使用与单色滤光片耦合的标准Xe灯评估了表观光子效率的波长依赖性。这些结果从该材料的电子结构的观点进行了解释。
We report dye-degradation effects of a semiconductor LiBiO_3 revealed under illumination of a conventionally used white fluorescent light. Optical absorbance spectra of LiBiO_3 were broadened so smoothly, with the absorption edge penetrated to around 730 nm, that the material was able to absorb a wide range of visible light. Results showed that solution of a standard dye, methylene blue, was degraded completely after 4 h illumination. Furthermore, the value of total organic carbon decreased 70% in the decolorized solution, suggesting that the molecular form of the original methylene blue was mineralized effectively to nonorganic fragments by the photoinduced oxidization effect. Moreover, the wavelength dependence of apparent photonic efficiency was evaluated using a standard Xe lamp coupled with monochromatic filters. These results were interpreted from the viewpoint of this material’s electronic structure.