| Morphology and Photocatalytic Activity of Nanosized Titania Particles |
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| 作者姓名： | 张剑平 施利毅 胡莹玉 潘庆谊 |
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| 作者单位： | DepartmentofChemistry,CollegeofSciences,ShanghaiUniversity,Shanghai200072,China |
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| 摘 要： | Nanosized TiO2 particles,synthesized by microemulsion-mediated method,were characterized by XRD,TEM,EDS and BET.To judge the activity of TiO2 particles,the photocatalytic destruction of phenol in areated suspension was studied.The result shows that the photocatalytic activity of lab-made nanometer anatase TiO2 is comparable to or higher than that of commercial titania perticles.The effects of smoe processing parameters such as TiO2 content,oxygen flow rate,pH value on phenol removal were also investigated.The experimental results indicate that there is an optimum value for the TiO2 content,Sufficient O2 supply is needed, but too high gas flow rate induces large bubbles that eliminate the gas residence time and the gas/liquid contact interface,The pH value of the phenol solutions has a complex effect on the photocatalytic activity of the particles.
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| 关 键 词： | 纳米二氧化钛颗粒 光催化激活 表面波度 |
| 收稿时间： | 11 July 2000 |
Morphology and photocatalytic activity of nanosized titania particles |
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| Jian-ping Zhang Master,Li-yi Shi,Ying-yu Hu,Qing-yi Pan.Morphology and Photocatalytic Activity of Nanosized Titania Particles[J].Journal of Shanghai University(English Edition),2001,5(3):247-252. |
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| Authors: | Jian-ping Zhang Master Li-yi Shi Ying-yu Hu Qing-yi Pan |
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| Institution: | Department of Chemistry, College of Sciences, Shanghai University, |
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| Abstract: | Nanosized TiO 2 particles, synthesized by microemulsion mediated method, were characterized by XRD, TEM, EDS and BET. To judge the activity of TiO 2 particles, the photocatalytic destruction of phenol in aerated suspension was studied. The result shows that the photocatalytic activity of lab made nanometer anatase TiO 2 is comparable to or higher than that of commercial titania particles. The effects of some processing parameters such as TiO 2 content, oxygen flow rate, pH value on phenol removal were also investigated. The experimental results indicate that there is an optimum value for the TiO 2 content. Sufficient O 2 supply is needed, but too high gas flow rate induces large bubbles that eliminate the gas residence time and the gas/liquid contact interface. The pH value of the phenol solutions has a complex effect on the photocatalytic activity of the particles. |
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| Keywords: | nanosized particles titanium dioxide phenol photocatalysis |
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