Nanomaterials Laboratory, Department of Chemistry, Kalasalingam Academy of Research and Education, Krishnankoil 626126, India.
Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamilnadu, India.
J Nanosci Nanotechnol. 2021 Mar 1;21(3):1526-1536. doi: 10.1166/jnn.2021.18984.
At present, nanotechnology field development makes a major role in photocatalysis. CdS-ZnMoO₄ (36.6 wt%) coupled nanophotocatalyst is synthesized using facile hydrothermal method. The CdSZnMoO₄ catalyst shows superior photocatalytic activity in the Naphthol Green B (NGB) dye degradation in UV-A (365 nm) light irradiation. XRD analysis reveals the monoclinic structure of ZnMoO₄, cubic structure of CdS. PL shows lesser the recombination (-) rate of electron-hole pair formation. UV-Vis-DRS reveals an increase in absorption in entire visible region while loading with CdS. SEM images indicate that CdS-ZnMoO₄ has nanofibrous structure. EDS reveal that Cd and S are present on the ZnMoO₄ surface. ECM indicates the division of homogeneity in elements. SAED pattern of HR-TEM images proved high crystalline properties of the catalyst. XPS reveals the different oxidation states and term-symbols of Cd, S, Zn, Mo and O in this catalyst with corresponding binding energies. CdS-ZnMoO₄ (18.5 m²g) has a higher surface area compared to ZnMoO₄ (10.8 m²g). Current densities obtained from CV reveals the higher cyclic movement of electrons (electrochemical activity) of CdS-ZnMoO₄. An effective parameters for photodegradability of NGB dye by CdS-ZnMoO₄ was analyzed.
目前，纳米技术领域的发展在光催化中起着重要作用。本文采用简便的水热法合成了 CdS-ZnMoO₄（36.6wt%）复合纳米光催化剂。CdS-ZnMoO₄ 催化剂在紫外光（365nm）照射下对萘酚绿 B（NGB）染料的降解表现出优异的光催化活性。XRD 分析表明 ZnMoO₄ 具有单斜结构，CdS 具有立方结构。PL 表明电子-空穴对形成的复合（-）速率较低。UV-Vis-DRS 表明在负载 CdS 后，整个可见光区的吸收增加。SEM 图像表明 CdS-ZnMoO₄ 具有纳米纤维结构。EDS 表明 Cd 和 S 存在于 ZnMoO₄ 表面。ECM 表明元素的均匀性发生了划分。高分辨率透射电子显微镜（HR-TEM）图像的 SAED 模式证明了催化剂的高结晶性能。XPS 表明催化剂中 Cd、S、Zn、Mo 和 O 的不同氧化态和术语符号，以及相应的结合能。与 ZnMoO₄（10.8 m²g）相比，CdS-ZnMoO₄（18.5 m²g）具有更高的比表面积。CV 获得的电流密度表明 CdS-ZnMoO₄ 具有更高的电子（电化学活性）循环运动。分析了 CdS-ZnMoO₄ 对 NGB 染料光降解的有效参数。
