Effect of CeO2 coupling on the structural, optical and photocatalytic properties of ZnO nanoparticle
Effect of CeO2 coupling on the structural, optical and photocatalytic properties of ZnO nanoparticle
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DOI：
10.1016/j.molstruc.2015.05.057
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发表时间：
2015-11-05
影响因子：
3.8
通讯作者：
Kennedy, L. John
中科院分区：
文献类型：
--
作者：
Sherly, E. D.;Vijaya, J. Judith;Kennedy, L. John
本论文主要研究ZnO-CeO 2复合纳米金属氧化物的微波辅助燃烧合成、表征及其光催化应用。在不使用任何有机溶剂或表面活性剂的条件下，采用微波辅助金属硝酸盐-尿素溶液燃烧合成法制备了ZnO、CeO 2以及ZnO与CeO 2摩尔比分别为1：1，2：1和1：2的ZnCe、Zn 2Ce和ZnCe 2复合氧化物。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、场发射扫描电子显微镜（FESEM）、能量色散X射线分析（EDX）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）、漫反射光谱（DRS）和光致发光光谱（PL）等手段对样品进行了表征。光催化活性实验表明，Zn 2Ce纳米粒子对2，4-二氯苯酚（2，4-DCP）具有良好的光催化降解性能。Zn 2Ce在240 min内降解了95%的2，4-DCP分子。与ZnCe、ZnCe 2或单组分ZnO和CeO 2纳米颗粒相比，Zn 2Ce的光催化降解能力更好，这归因于其改善了光生电子-空穴对的分离。(C)2015爱思唯尔B. V.保留所有权利。
This research work presents the microwave assisted combustion synthesis, characterization and photocatalytic applications of ZnO-CeO2 coupled nano metal oxide. ZnO, CeO2 and the coupled oxides ZnCe, Zn2Ce and ZnCe2 with ZnO and CeO2 in the molar ratio 1:1, 2:1 and 1:2 respectively were fabricated by microwave assisted metal nitrate-urea solution combustion synthesis, without using any organic solvent or surfactant. As-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), diffuse reflectance spectroscopy (DRS) and photoluminescence spectroscopy(PL). The experiments of photocatalytic activity indicate that Zn2Ce nanoparticles exhibit excellent photocatalytic performance in the degradation of 2,4-dichlorophenol (2,4-DCP). 95% of 2,4-DCP molecules were decomposed by Zn2Ce in 240 min. The better photocatalytic degradation ability of Zn2Ce compared to ZnCe, ZnCe2 or single component ZnO and CeO2 nanoparticles is attributed to the improved separation of photogenerated electron-hole pairs. (C) 2015 Elsevier B.V. All rights reserved.