摘要
通过一步水热法制备了光催化剂Cu_(x)Zn_(1-x)S/RGO,实现了Cu_(x)Zn_(1-x)S纳米颗粒的可控生长和氧化石墨烯(GO)还原的同步进行,并将所制备的Cu_(x)Zn_(1-x)S/RGO用于环丙沙星(CIP)的催化降解研究.采用X-射线衍射(XRD)、电感耦合等离子体-原子发射光谱仪(ICP-AES)、傅立叶变换红外光谱(FTIR)、紫外可见漫反射光谱(UV-Vis)、电子显微镜(SEM)和透射电子显微镜(TEM)对复合物的组成形貌进行表征.结果表明,球状的Cu_(x)Zn_(1-x)S颗粒成功负载在石墨烯表面.Cu^(2+)的掺杂增强了Cu_(x)Zn_(1-x)S/RGO光催化剂在可见光范围的响应,石墨烯的引入抑制了Cu_(x)Zn_(1-x)S纳米颗粒的团聚,提高了光催化性能.此外,Cu_(0.1)Zn_(0.9)S/RGO_(10)对CIP的降解速率分别是ZnS、Cu_(0.1)Zn_(0.9)S的8倍和4.4倍.
A facile approach to prepare Cu_(x)Zn_(1-x)S/RGO photocatalyst was developed via a one-step hydrothermal synthesis.Formation of Cu_(x)Zn_(1-x)S nanoparticles and the reduction of graphene oxide(GO)were achieved simultaneously in the synthesis process.The degradation of ciprofloxacin(CIP)catalyzed by Cu_(x)Zn_(1-x)S/RGO composite was investigated.The composites were characterized by X-ray diffraction(XRD),inductively coupled plasma-atomic emission spectrometer(ICP-AES),Fourier transform infrared spectroscopy(FTIR),ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis),scanming electron microscopy(SEM)and transmission electron microscopy(TEM).The characterization results showed that spherical Cu_(x)Zn_(1-x)S nanoparticles were tightly attached to graphene.Doping of Cu^(2+)enhanced the response of Cu_(x)Zn_(1-x)S/RGO photocatalyst in the visible light range.The introduction of graphene inhibited the agglomeration of Cu_(x)Zn_(1-x)S nanoparticles and improved the photocatalytic performance.In addition,the photocatalytic degradation rate of Cu_(0.1)Zn_(0.9)S/RGO_(10)toward CIP was almost 8 times the rate of ZnS and 4.4 times that of ZnS、Cu_(0.1)Zn_(0.9)S,respectively.
作者
叶少琛
徐向阳
何光裕
陈海群
YE Shaochen;XU Xiangyang;HE Guangyu;CHEN Haiqun(Changzhou Key Laboratory of Graphene-based Materials,School of Petrochemical Engineering,Changzhou University,Changzhou,213164,China)
出处
《环境化学》
CAS
CSCD
北大核心
2020年第7期1977-1984,共8页
Environmental Chemistry
基金
国家自然科学基金(51572036,51472035)资助
