珊瑚状NiS/CdS/CDs三元催化剂的水热制备及光催化水裂解的性能  

Hydrothermal Preparation of Coral-like NiS/CdS/CDs Ternary Catalysts and Performance of Photocatalytic Water Splitting

作　　者：王金铭 王艺霖 刘颖[1] 李维平[1] 张超[1] WANG Jinming;WANG Yilin;LIU Ying;LI Weiping;ZHANG Chao(College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2024年第6期21-31,共11页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(NSFC21978141);山东省博士基金项目(ZR2019BB010);中国博士后科学基金项目(2020M672015)。

摘　　要：在合成出分散均匀CDs的基础上,通过水热法制备了珊瑚状的NiS/CdS/CDs三元光催化剂。系统研究了CDs添加量和NiS与CdS的比例对NiS/CdS/CDs三元催化剂催化性能的影响。利用TEM、XRD、XPS等技术手段对光催化剂进行材料表征,并以裂解水制氢气的实验对光催化剂的活性进行评价。实验结果表明,NiS/CdS/CDs三元催化剂比纯CdS和NiS/CdS具有更好的催化性能。当CDs的添加量为0.4 mL,NiS和CdS的质量分数为46.75%和52.05%时,NiS/CdS/CDs具有最高的催化性能(48303.57μmol·(h·g)^(-1),λ≥420 nm)。这源于CDs、NiS和CdS的协同作用,增强了可见光的吸收,抑制了电子-空穴的复合,因此NiS/CdS/CDs三元催化剂的性能得到显著提高。Based on the synthesis of uniformly dispersed CDs,coral-like NiS/CdS/CDs ternary photocatalysts were prepared by hydrothermal method.The effects of the amount of CDs added and the ratio of NiS to CdS on the catalytic performance of NiS/CdS/CDs ternary catalysts were systematically studied.The photocatalysts were characterized by TEM,XRD,XPS and other techniques,and the photocatalyst activity was evaluated by the experiment of splitting water to hydrogen.The experimental results shown that the NiS/CdS/CDs threeway catalyst has better catalytic performance than pure CdS and NiS/CdS.When the added amount of CDs was 0.4 mL,the mass fractions of NiS and CDs were 46.75%and 52.05%,NiS/CdS/CDs had the highest catalytic performance(48303.57μmol·(h·g)^(-1),λ≥420 nm).This was due to the synergistic effect of CDs,NiS,and CdS,which enhances the absorption of visible light and suppresses the electron-hole recombination,so the performance of the NiS/CdS/CDs ternary catalyst is significantly improved.

关 键 词：NiS/CdS/CDs三元催化剂 水热法 光催化 p-n结 

分 类 号：O614[理学—无机化学]