Cui Yi-Wei, Zhang Hai-Huan, Yu Shi-Yong
Inner Mongolia Key Laboratory of Mongolian Medicine Chemistry, Inner Mongolia Key Laboratory of Coal Chemistry, School of Chemistry and Chemical Engineering, Inner Mongolia University Hohhot 010021 Inner Mongolia China
RSC Adv. 2019 Oct 31;9(60):35189-35196. doi: 10.1039/c9ra06591a. eCollection 2019 Oct 28.
Efficient C-ZnS/ZnMoO@MoS and C-ZnS/MoS nanocomposite photocatalysts, using ZIF-8 derived C-ZnO as a precursor were successfully synthesized using a simple one-pot procedure. This is the first application that involves transforming ZIF-8 into C-ZnMoO for photocatalysis. The C-ZnS/ZnMoO@MoS and C-ZnS/MoS heterostructures were characterized by X-ray diffraction, UV-vis, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, photocurrent measurements, scanning electron microscopy and transmission electron microscopy. The ZM2 sample of C-ZnS/ZnMoO@MoS exhibited enhanced photocatalytic activity of about 2.9 times as high as that of ZIF-8 derived C-ZnO in the reduction of tetracycline hydrochloride, and also showed obvious photocatalytic activity 1.81 and 3.33 times as high as that of a ZM3 sample of C-ZnS/MoS and ZIF-8 derived C-ZnO in the degradation of RhB, respectively. The improved photodegradation activity is a result of the heterogenous structure and the tighter contact between C-ZnS and C-ZnMoO compared with the physical contact of general heterogenous photocatalysts. The C-ZnS/ZnMoO@MoS heterostructure photocatalyst is expected to be a new type of nanomaterial for the degradation of pollutants from wastewater.
以ZIF-8衍生的C-ZnO为前驱体，采用简单的一锅法成功合成了高效的C-ZnS/ZnMoO@MoS和C-ZnS/MoS纳米复合光催化剂。这是首次将ZIF-8转化为C-ZnMoO用于光催化的应用。通过X射线衍射、紫外可见光谱、X射线光电子能谱、电化学阻抗谱、光电流测量、扫描电子显微镜和透射电子显微镜对C-ZnS/ZnMoO@MoS和C-ZnS/MoS异质结构进行了表征。C-ZnS/ZnMoO@MoS的ZM2样品在还原盐酸四环素方面表现出增强的光催化活性，约为ZIF-8衍生的C-ZnO的2.9倍，并且在降解罗丹明B方面也分别表现出明显的光催化活性，是C-ZnS/MoS的ZM3样品和ZIF-8衍生的C-ZnO的1.81倍和3.33倍。光降解活性的提高是由于异质结构以及与一般异质光催化剂的物理接触相比，C-ZnS和C-ZnMoO之间更紧密的接触。C-ZnS/ZnMoO@MoS异质结构光催化剂有望成为一种新型的用于降解废水中污染物的纳米材料。
