| Preparation and photocatalytic activity of Gd-doped TiO_2 nanofibre |
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| 作者姓名： | 周艺 张世英 朱志平 李永坤 |
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| 作者单位： | Department of Chemistry and Enviroment Changsha University of Science and technology Changsha 410076 China，Department of Chemistry Changsha University Changsha 410007 China，Department of Chemistry and Enviroment Changsha University of Science and technology Changsha 410076 China，School of Chemistry and Chemical Engineering Central South University Changsha 410083 China |
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| 基金项目： | Foundationitem:Project(50174024)supportedbytheNationalNaturalScienceFoundationofChina，project(03JJY4046)supportedbytheNaturalScienceFoundationofHunanProvince，project(03C057)supportedbyScientificResearchFundofHunanProvincialEducationDepartment |
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| 摘 要： | 1INTRODUCTION TiO2hassomespecialpropertiesincludingphotocatalyticactivity,chemicalstability,andre sistancetowear,non poisonlowcostandcanbepreparedatlowcost.Ifmodifiedwithproperinter mingle,itcanbedirectlyusedinthesunlight.Sotitaniumdioxideisoneofthemostpotentialphoto catalyzers1,2].Itsphotocatalyticoxidationabilityincreasesrapidlywiththedecreaseofparticledi ameter.Whenitsdiameterreaches10100nm,itwillshowobvioussurfaceeffectandquantumeffect.Moreover,itwillshowhighphotocatalyticactivityif…
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Preparation and photocatalytic activity of Gd-doped TiO_2 nanofibre |
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| ZHOU Yi,ZHANG Shi-ying,ZHU Zhi-ping,LI Yong-kun.Preparation and photocatalytic activity of Gd-doped TiO_2 nanofibre[J].Journal of Central South University of Technology,2005(6). |
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| Authors: | ZHOU Yi ZHANG Shi-ying ZHU Zhi-ping LI Yong-kun |
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| Affiliation: | ZHOU Yi1,ZHANG Shi-ying2,ZHU Zhi-ping1,LI Yong-kun3 |
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| Abstract: | In order to realize the photocatalysis of TiO_2 in the sunlight and directly apply it to waste water treatment, the Gd-doped TiO_2 nanofibre was synthesized using two-step synthesis method as follows: Firstly, potassium carbonate, titanium dioxide and proper gadolinium oxide (dopant) were calcined in the muffle at high temperature and the doped gadolinium K_2Ti_4O_9 fibres were obtained; secondly, the fibre was heated using glycerol as solvent until Gd-doped TiO_2 nanofibres were obtained. The synthesized samples were characterized using scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The results show that Gd-doped TiO_2 nanofibre heat-treated by glycerol solvent can inhibit the agglomeration, so the grain diameter of the fibre is smaller than that without heat-treated with glycerol. Meanwhile, the diameter of the fibre decreases with the increase of the heating temperature and time. 97% 98% of Gd-doped TiO_2 nanofibre is anatase. The photocatalysis results showed that the photocatalysis activity of Gd-doped TiO_2 nanofibre is just a little lower than that of TiO_2 powder. |
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| Keywords: | photocatalytic activity two-step synthesis method Gd-doped TiO_2 nanofibre K_2Ti_4O_9 photocatalytic degradation |
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