Novel Pd/TiO2 nanocomposite prepared by modified sol-gel method for photocatalytic degradation of methylene blue dye under visible light irradiation
Novel Pd/TiO2 nanocomposite prepared by modified sol-gel method for photocatalytic degradation of methylene blue dye under visible light irradiation
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DOI：
10.1016/j.jallcom.2013.04.112
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发表时间：
2013-11-05
影响因子：
6.2
通讯作者：
Mohamed, R. M.
中科院分区：
文献类型：
--
作者：
Abdelaal, M. Y.;Mohamed, R. M.
采用改进的溶胶-凝胶法制备了TiO2纳米粒子。使用浸渍法制备了用 Pd 和/或壳聚糖 (CS) 浸渍的 TiO2。通过 XRD、TEM、UV-Vis、PI 和 BET 对 Pd/TiO2 复合光催化剂进行了表征。使用亚甲基蓝染料（MB）作为模型污染物研究可见光照射下TiO2的光催化活性。研究了催化剂类型和用量以及MB初始浓度的影响。结果表明CS可以有效防止TiO2纳米粒子的团聚。紫外-可见光谱表明复合材料吸收可见光的能力大大提高。 MB 的光催化降解被发现遵循一级动力学。回收实验证实了催化剂的相对稳定性。 (C) 2013 Elsevier B.V. 保留所有权利。
TiO2 nanoparticles were prepared using the modified sol-gel method. TiO2 impregnated with Pd and/or chitosan (CS) was prepared using the impregnation method. The Pd/TiO2 composite photocatalyst was characterized by XRD, TEM, UV-Vis, PI, and BET. A methylene blue dye (MB) was used as a model pollutant to study the photocatalytic activity of TiO2 under visible light irradiation. The influence of the type and amount of catalyst as well as the initial concentration of MB was investigated. The results indicate that CS can effectively prevent the agglomeration of TiO2 nanoparticles. UV-Vis spectra demonstrated that the composite's ability to absorb visible light is greatly improved. The photocatalytic degradation of MB was found to follow first-order kinetics. Recycling experiments confirmed the relative stability of the catalyst. (C) 2013 Elsevier B.V. All rights reserved.