Facile synthesis of ZnO flowers modified graphene like MoS2 sheets for enhanced visible-light-driven photocatalytic activity and antibacterial properties
Facile synthesis of ZnO flowers modified graphene like MoS2 sheets for enhanced visible-light-driven photocatalytic activity and antibacterial properties
复制标题
DOI：
10.1016/j.jallcom.2016.04.267
复制
发表时间：
2016-10-15
影响因子：
6.2
通讯作者：
Kim, Cheol Sang
中科院分区：
文献类型：
--
作者：
Awasthi, Ganesh Prasad;Adhikari, Surya Prasad;Kim, Cheol Sang
采用简单易行的一锅水热法制备了均匀附着在二硫化钼（MoS2）表面的氧化锌（ZnO）纳米花。采用场发射扫描电镜（FE-SEM）、透射电镜（TEM）、x射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）和光致发光（PL）光谱对制备的样品进行了形貌和微观结构表征。采用物理化学分析仪测定了BET表面积。表征结果表明，花状ZnO微结构均匀附着在MoS2表面。在紫外和可见光照射下，与纯MoS2和ZnO相比，制备的MoS2/ZnO复合材料对苯酚红的光催化活性和稳定性均有所提高。这种光降解能力的增强归因于花状ZnO粒子与片状MoS2结构之间的协同作用，从而提高了光诱导电子的迁移效率，阻碍了电子-空穴复合速率。研究还发现，复合材料中二硫化钼的含量对降解活性有显著影响。此外，对革兰氏阴性大肠杆菌的抑菌活性测试表明，MoS2/ZnO复合材料比纯ZnO和MoS2具有更好的抑菌性能。(C) 2016年Elsevier B.V.出版
Zinc oxide (ZnO) nano flowers uniformly attached to the surface of Molybdenum disulfide (MoS2) sheet were successfully prepared via a simple facile one pot hydrothermal method. The morphology and microstructure of the prepared samples was characterized using field - emission scanning electron microscopy (FE-SEM), Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and photoluminescence (PL) spectroscopy. The Brunauer-EmmettTeller (BET) surface area was determined using physical and chemical analyzer. The characterization results showed that the flowers like ZnO micro-structures were uniformly attached to the surface of MoS2. The as-prepared MoS2/ZnO composite showed enhanced photocatalytic activity and considerable stability for the photo degradation of phenol red as compared with pure MoS2 and ZnO under both UV and visible light irradiation. Such an enhancement of photo degradation capability was ascribed to the synergistic effect between the flowers-shaped ZnO particles and sheet-like structure of MoS2, which boost the migration efficiency of photo-induced electrons and hinder electron-hole recombination rate. It was also found that the amount of MoS2 in the composite has a significant effect on the degradation activity. Moreover, the antibacterial activity test towards the gram negative Escherichia-coli showed that the MoS2/ZnO composite has better antibacterial properties compared to pure ZnO and MoS2. (C) 2016 Published by Elsevier B.V.