Cu-doped TiO2 nanoparticles for photocatalytic disinfection of bacteria under visible light
Cu-doped TiO2 nanoparticles for photocatalytic disinfection of bacteria under visible light
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DOI：
10.1016/j.jcis.2010.08.012
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发表时间：
2010-12-01
影响因子：
9.9
通讯作者：
Anandi, V.
中科院分区：
文献类型：
--
作者：
Karunakaran, C.;Abiramasundari, G.;Anandi, V.
采用改进的氨蒸发诱导合成法制备了 2% Cu 掺杂的 TiO2 纳米粒子，并在 450 ℃ 下煅烧，并通过粉末 X 射线衍射、能量色散 X 射线分析、ESR 光谱、扫描电子显微镜、紫外-可见漫反射光谱、光致发光光谱和电化学阻抗谱进行了表征。掺杂将光学吸收边缘移至可见光区域，但增加了电荷转移电阻并降低了电容。在可见光下，复合纳米粒子非常有效地催化大肠杆菌的消毒。所制备的氧化物具有光催化选择性；在紫外光照射下，其光催化降解日落黄、罗丹明B.和亚甲基蓝染料的活性低于未掺杂的。 (C) 2010 Elsevier Inc. 保留所有权利。
Two percent Cu-doped TiO2 nanoparticles were prepared by a modified ammonia-evaporation-induced synthetic method, calcined at 450 degrees C, and characterized by powder X-ray diffraction, energy dispersive X-ray analysis, ESR spectroscopy, scanning electron microscopy, UV-visible diffuse reflectance spectrum, photoluminescence spectroscopy, and electrochemical impedance spectroscopy. Doping shifts the optical absorption edge to the visible region but increases the charge-transfer resistance and decreases the capacitance. Under visible light, the composite nanoparticles very efficiently catalyze the disinfection of Escherichia coli. The prepared oxide is selective in photocatalysis; under UV light, its photocatalytic activity to degrade sunset yellow, rhodamine B. and methylene blue dyes is less than that of the undoped one. (C) 2010 Elsevier Inc. All rights reserved.