Effect of Fe3+ ion doping to TiO2 on the photocatalytic degradation of Malachite Green dye under UV and vis-irradiation
Effect of Fe3+ ion doping to TiO2 on the photocatalytic degradation of Malachite Green dye under UV and vis-irradiation
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DOI：
10.1016/j.jphotochem.2008.12.021
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发表时间：
2009-03-05
影响因子：
4.3
通讯作者：
Arpac, Ertugrul
中科院分区：
文献类型：
--
作者：
Asilturk, Meltem;Sayilkan, Funda;Arpac, Ertugrul
以异丙醇钛(Ti(OPri)(4))为前驱体，在225℃的水热条件下合成了Fe3+掺杂的TiO2光催化剂。分别用未掺杂和掺杂的二氧化钛粒子对玻璃表面进行包覆。考察了涂层表面在紫外光和可见光照射下对水溶液中孔雀石绿(MG)染料的光催化降解性能。用X射线衍射仪、扫描电子显微镜和UV/Vis/NIR技术对所制得的纳米粒子和薄膜进行了表征。结果表明，水热法合成的二氧化钛颗粒的晶粒度为纳米级。锐钛矿相仅为晶相。Fe3+离子的掺杂改善了TiO2光催化降解性能。Fe3+掺杂二氧化钛的降解性能。在紫外光和可见光照射条件下测得的包覆表面高于未掺杂的二氧化钛包覆表面。结果表明，在紫外光照射下，Fe3+掺杂TiO2光催化降解L-1微球的反应符合准一级反应动力学，反应速率常数为0.0202 m in(-1)。(C)2008爱思唯尔B.V.保留所有权利
Fe3+ ion-doped TiO2 particles were synthesized by the hydrothermal process at 225 degrees C. Titanium isopropoxide (Ti(OPri)(4)) was used as precursor material. Both undoped and doped TiO2 particles were used to coat glass surface. The coated surface was examined with respect to their photocatalytic performance for degradation of Malachite Green (MG) dye in aqueous solution under UV and vis-light irradiation. The particles and the films were characterized by XRD, SEM and UV/vis/NIR techniques. The results showed that crystallite size of the hydrothermally synthesized TiO2 particles are in nanoscale. Anatase was only the crystalline phase. Doping of Fe3+ ion improved the photodegradation performance of TiO2 coated surfaces. Degradation performance of Fe3+ doped TiO2. coated surfaces determined under UV- and vis-irradiation conditions was higher than the undoped TiO2 coated surface. It was concluded that the photodegradation of 2.5 mg L-1 MG under UV-light irradiation with the catalysis of Fe3+-doped TiO2 follows the pseudo-first-order reaction kinetics with the rate constant of 0.0202 min(-1). (C) 2008 Elsevier B.V. All rights reserved