ZnIn2S4/Au纳米片阵列的制备及其可见光响应光电化学固氮特性  

Fabrication of ZnIn2S4/Au Nanosheet Arrays for Visible⁃Light⁃Response Photoelectrochemical N2 Fixation

作　　者：李坤[1,2] 蔡晓燕 赵宇龙[1,2] 顾修全[1,2] 毛梁 LI Kun;CAI Xiao-Yan;ZHAO Yu-Long;GU Xiu-Quan;MAO Liang(School of Materials and Physics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Jiangsu Province Engineering Laboratory of Highly Efficient Energy Storage Technology and Equipmentphysics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学材料与物理学院,徐州221116 [2]中国矿业大学江苏省储能技术与装备工程实验室,徐州221116

出　　处：《无机化学学报》2020年第11期2179-2188,共10页Chinese Journal of Inorganic Chemistry

基　　金：中央高校基本科研业务费专项资金资助项目(No.2019XKQYMS11)资助。

摘　　要：采用简单的水热法合成出单晶ZnIn2S4纳米片阵列以实现可见光响应光电化学固氮。并采用光沉积法将超细Au纳米颗粒(5 nm)沉积于ZnIn2S4纳米片的棱角位置处,实现了可见光俘获和载流子分离能力的同时增强。当负载合适含量的Au纳米颗粒,ZnIn2S4纳米片阵列的光电固氮活性由1.092μg·cm-2·h-1提升至2.262μg·cm-2·h-1。我们还提出一个简单模型用以阐明其性能增强机制,这也被光致发光(PL)谱和光电化学(PEC)性能结果所证实。In this study,single⁃crystal ZnIn2S4 nanosheet arrays(NSAs)were synthesized via a facile hydrothermal route for photoelectrochemical(PEC)N2 fixation under a visible light irradiation.The Au nanoparticles(NPs)with average size of 5 nm were deposited onto the edges of ZnIn2S4 nanosheets through a photodeposition method,leading to both the enhancements of visible light harvesting and carrier separation.After optimizing the Au loading amounts,the PEC N2 fixation activity was enhanced significantly from 1.09 to 2.26μg·cm-2·h-1,which is attributed to the enhancements of visible light absorption and carrier separation.Furthermore,a schematic model was used to clarify the mechanism as had been demonstrated by the photoluminescence(PL)and PEC results,respectively.

关 键 词：ZnIn2S4纳米片阵列 金负载 可见光吸收 光电化学固氮 

分 类 号：O649[理学—物理化学] O614.241[理学—化学]