Porosity and photocatalytic studies of transition metal doped ZnO nanoclusters
Porosity and photocatalytic studies of transition metal doped ZnO nanoclusters
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DOI：
10.1016/j.micromeso.2010.05.026
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发表时间：
2010-10-01
影响因子：
5.2
通讯作者：
Bahadur, D.
中科院分区：
文献类型：
--
作者：
Barick, K. C.;Singh, Sarika;Bahadur, D.
纯金属和过渡金属的高度介孔自聚集纳米团簇以二甘醇（DEG）为介质，采用醋酸盐前驱体法合成了（Mn，Co，Ni）掺杂的ZnO。研究发现，由大量纳米晶组成的多孔球形纳米团簇具有较好的稳定性、规整性和离散性，具有六方纤锌矿结构。Ni和Co被成功地掺杂到ZnO结构中，并均匀地分布在样品中。在N-2吸附-脱附等温线中存在明显的滞后回线，表明孔的三维交叉网络（本质上主要是介孔）透射电子显微镜（TEM）分析表明，孔的形状不规则，随机分布在整个纳米团簇中。此外，我们已经探索了这些中孔纯/掺杂ZnO纳米团簇的光催化活性，使用亚甲基蓝作为模型染料。已经观察到，与过渡金属掺杂的ZnO相比，这些介孔ZnO在UV光下可以是用于降解有机分子的有前景的光催化剂（C）2010 Elsevier Inc. All rights reserved.
Highly mesoporous self-aggregated nanoclusters of pure and transition metal (Mn, Co and Ni) doped ZnO have been synthesized by refluxing their acetate precursors in diethylene glycol (DEG) medium It was found that the porous spherical nanoclusters comprised of numerous nanocrystals are fairly stable, well-defined and discrete with hexagonal wurtzite structure The transition metal ions, Mn, Ni and Co were successfully doped into the ZnO structure and are uniformly distributed in the samples The presence of pronounced hysteresis loop in N-2 adsorption-desorption isotherm curves indicates the 3D intersection network of the pores (predominantly mesoporous in nature) Transmission electron microscopy (TEM) analysis indicates that the pores are irregular in shape and randomly distributed throughout the nanocluster Furthermore, we have explored the photocatalytic activity of these mesoporus pure/doped ZnO nanoclusters using methylene blue as a model dye. It has been observed that these mesoporous ZnO could be a promising photocatalyst for degradation of organic molecules as compared to transition metal doped ZnO under UV light (C) 2010 Elsevier Inc. All rights reserved.