Gadolinium doped tin dioxide nanoparticles: an efficient visible light active photocatalyst
来源期刊：Journal of Rare Earths2015年第12期
论文作者：Abdullah M Al-Hamdi Mika Sillanp?? Joydeep Dutta
文章页码：1275 - 1283
摘 要：Photocatalytic degradation of phenol with sol-gel prepared rare earth doped tin dioxide（SnO2） nanoparticles was reported.Gadolinium doped tin dioxide（SnO2:Gd） nanoparticles were found to absorb higher visible light compared to lanthanum,neodymium and cerium doped materials that were studied in detail.Photocatalytic degradation of phenol under artificial white light and sunlight in the presence of SnO2:Gd nanoparticles was studied with high performance liquid chromatography（HPLC）,capillary electrophoresis（CE）,total organic carbon（TOC） measurements and the determination of chemical oxygen demand（COD）.Clear correlations between the results obtained from these multiple measurements were found,and a kinetic pathway for the degradation process was proposed.Within 150 min of solar irradiation,the TOC of a 10 ppm phenol solution in water was reduced by 95%-99%,thus demonstrating that SnO2:Gd nanoparticles are efficient visible light photocatalysts.
Abdullah M Al-Hamdi1，Mika Sillanp??1，Joydeep Dutta2,3
1. Laboratory of Green Chemistry, Lappeenranta University of Technology2. Chair in Nanotechnology, Water Research Center, Sultan Qaboos University3. Functional Materials Division, School of Information and Communication Technology, KTH Royal Institute of Technology
摘 要：Photocatalytic degradation of phenol with sol-gel prepared rare earth doped tin dioxide（SnO2） nanoparticles was reported.Gadolinium doped tin dioxide（SnO2:Gd） nanoparticles were found to absorb higher visible light compared to lanthanum,neodymium and cerium doped materials that were studied in detail.Photocatalytic degradation of phenol under artificial white light and sunlight in the presence of SnO2:Gd nanoparticles was studied with high performance liquid chromatography（HPLC）,capillary electrophoresis（CE）,total organic carbon（TOC） measurements and the determination of chemical oxygen demand（COD）.Clear correlations between the results obtained from these multiple measurements were found,and a kinetic pathway for the degradation process was proposed.Within 150 min of solar irradiation,the TOC of a 10 ppm phenol solution in water was reduced by 95%-99%,thus demonstrating that SnO2:Gd nanoparticles are efficient visible light photocatalysts.
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