Synthesis of Cu2O/T-ZnOw nanocompound and characterization of its photocatalytic activity and stability property under UV irradiation
Synthesis of Cu2O/T-ZnOw nanocompound and characterization of its photocatalytic activity and stability property under UV irradiation
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DOI：
10.1016/j.mseb.2012.10.041
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发表时间：
2013-02-01
影响因子：
3.6
通讯作者：
Xiang, F. M.
中科院分区：
文献类型：
--
作者：
Liu, H.;Wang, J.;Xiang, F. M.
采用一种简单的水热化学法合成了Cu2O/四针状氧化锌晶须(T-ZnOw)纳米复合材料。详细研究了Cu2O/T-ZnOw纳米复合材料的化学组成、形貌、禁带和光催化性能。结果表明，沉积在T-ZnOw表面的Cu2O颗粒具有立方结构，其结晶度不随C晶体的增加而变化。Cu2O纳米化合物中Cu2O的形态和含量对光催化活性有重要影响。另外，由于Cu2O和T-ZnOw纳米粒子的异质结效应，使得纳米Cu2O和T-ZnOw共存有利于提高光催化活性。在紫外光照射下，由7.2%的铜/锌磁流变液制备的Cu2O/T-ZnOw纳米复合材料对MO溶液的光催化降解活性最好。在光照前100min，MO溶液的光降解率达到99.16%，即使在第四次循环结束时仍保持了89.10%的高光催化活性。光催化反应后，除颗粒表面发生部分氧化外，其物相组成变化不大。探讨了紫外光驱动提高Cu2O/T-ZnOw纳米复合材料光催化活性的机理。(C)2012爱思唯尔B.V.保留所有权利。
Cu2O/tetrapod-like ZnO whisker (T-ZnOw) nanocompound was synthesized by a simple hydrothermal chemical method. The chemical composition, morphology, band gap and photocatalytic property of the Cu2O/T-ZnOw nanocompound were studied in detail. It was observed that the Cu2O particles deposited on T-ZnOw surface had a cubic structure and the crystallinity of T-ZnOw did not change with the increase of C crystals. The morphology and content of Cu2O in the Cu2O nanocompound played an important role on the photocatalytic activity. In addition, the coexistence of Cu2O and T-ZnOw nanoparticles was propitious to the high photocatalytic activity owing to their hetero-junction effect. The Cu2O/T-ZnOw nanocompound prepared by 7.2% Cu/Zn MR exhibited the best photocatalytic activity on the degradation of MO solution under UV light irradiation. At the first 100 min of irradiation, the photodegradation efficiency of MO solution reached up to 99.16%, which still retained its high photocatalytic activity about 89.10% even at the end of the fourth cycle. Little change was found in their phase compositions after the photocatalytic reaction process, except partial oxidation of particles' surface. The mechanism for UV light driven photocatalytic activity enhancement over Cu2O/T-ZnOw nanocompound was discussed. (c) 2012 Elsevier B.V. All rights reserved.