Controlled mesoporous self-assembly of ZnS microsphere for photocatalytic degradation of Methyl Orange dye
Controlled mesoporous self-assembly of ZnS microsphere for photocatalytic degradation of Methyl Orange dye
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DOI：
10.1016/j.jphotochem.2010.06.008
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发表时间：
2010-12-15
影响因子：
4.3
通讯作者：
Abdulla-Al-Mamun, Md.
中科院分区：
文献类型：
--
作者：
Muruganandham, M.;Amutha, R.;Abdulla-Al-Mamun, Md.
本文报道了孔径可调的介孔ZnS微球的自组装合成及其光催化活性。以橙子（MO）为模型污染物，在紫外光照射下考察了其光催化活性.采用水热法在不使用任何模板剂和催化剂的情况下大规模合成了介孔光催化剂。采用场发射扫描电子显微镜（FE-SEM）、高分辨透射电子显微镜（HR-TEM）、X射线衍射仪（XRD）和能谱仪（EDX）对产物进行了表征。氮气吸附分析证实了介孔结构的存在。光催化剂的孔径可以通过改变锌前体的浓度从2.6扩大到7.2 nm。微球的形成是通过自组装和Ostwald熟化过程来促进的。总之，这种简单的合成方法为大规模制备介孔光催化剂开辟了新的前景。(C)2010 Elsevier B. V.保留所有权利。
In this article, we have reported self-assembled synthesis of pore tunable, mesoporous ZnS microsphere and its photocatalytic activity. The photocatalytic activity was evaluated using Methyl Orange (MO) as model pollutant under UV light irradiation. The mesoporous photocatalysts was synthesized using hydrothermal method without using any templates or catalysts in large scale. The products were characterized by field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectrometry (EDX). The nitrogen adsorption analysis confirmed the presence of mesoporous structure. The pore size of the photocatalysts could be enlarged from 2.6 to 7.2 nm by changing the concentration of the zinc precursor. The microsphere formation has been facilitated by self-assembly followed by Ostwald ripening process. In conclusion, this simple synthetic methodology open new vistas to prepare mesoporous photocatalysts in large scale. (C) 2010 Elsevier B.V. All rights reserved.