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Preparation and Photocatalytic Activity of Ce, H3PW12O40 co-doped TiO2 Hollow Fibers
Shu-hua Yao,Shuang Chen,Zhong-liang Shi*
Author NameAffiliationE-mail
Shu-hua Yao School of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China  
Shuang Chen School of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China  
Zhong-liang Shi* School of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China shzhl2000@163.com 
Abstract:
A series of Ce, H3PW12O40 co-doped TiO2 hollow fibers photocatalysts have been prepared by sol-gel method using ammonium ceric nitrate, H3PW12O40 and tetrabutyltitanate as pre-cursors and cotton fibers as template, followed by calcination at 500 oC in N2 atmosphere for 2 h. Scanning electron microscopy, X-ray diffraction, nitrogen adsorption-desorption mea-surements, and UV-Vis spectroscopy are employed to characterize the morphology, crystal structure, surface structure, and optical absorption properties of the samples. The photo-catalytic performance of the samples has been studied by photodegradation phenol in water under UV and visible light irradiation. The results show that the TiO2 fiber materials have hollow structures, and the co-doped TiO2 hollow fibers exhibit higher photocatalytic activi-ties for the degradation of phenol than un-doped, single-doped TiO2 hollow fibers under UV and visible light. In addition, the recyclability of co-doped TiO2 fibers is also confirmed that the TiO2 fiber retains ca. 90% of its activity after being used four times. It is shown that the co-doped TiO2 fibers can be activated by visible light and may be potentially applied to the treatment of water contaminated by organic pollutants. The synergistic effect of Ce and H3PW12O40 co-doping plays an important role in improving the photocatalytic activity.
Key words:  TiO2 hollow fibers, Ce and H3PW12O40 co-doping, Photocatalytic activity, Template method, Phenol
FundProject:
铈和磷钨酸共掺杂纳米二氧化钛中空纤维的制备及其光催化活性
姚淑华,陈爽,石中亮*
摘要:
以棉花纤维为模板,以钛酸四正丁酯、硝酸铈铵和磷钨酸为原料采用模板法制备了一系列铈和磷钨酸共掺杂的、具有中空纤维结构的TiO2光催化材料, 利用扫描电子显微镜、X射线衍射、BET和紫外-可见光谱等技术对其形貌、晶体结构及表面结构、光吸收特性等进行了表征. 以苯酚溶液的光催化降解为模型反应,考察了不同掺杂量的样品在紫外和可见光下的光催化性能. 结果表明,用模板法制备的TiO2纤维材料具有中空结构,共掺杂的TiO2纤维在紫外和可见光条件下较纯TiO2纤维和单掺杂TiO2纤维对苯酚溶液具有更好的光催化降解效果, 且铈和磷钨酸的掺杂量显著影响该纤维材料的催化性能;当铈掺杂量为0.3mol%和磷钨酸掺杂量为2mol%,在500 oC焙烧2 h所得中空纤维材料的催化性能最佳,4 h即可使苯酚溶液的降解率达98.5%;重复使用4次仍可使苯酚溶液的降解率保持在87%以上,且该催化剂材料易于离心分离去除.
关键词:  TiO2中空纤维,铈、磷钨酸共掺杂,光催化活性,模板合成法,苯酚
DOI:10.1063/1674-0068/27/03/343-349
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