摘要
Dual argon plasmas ignited by one direct current power source are used to treat an aqueous solution of hydrogen tetrachloroaurate-(Ⅲ)trihydrate(HAuCl_(4)·3H_(2)O)which is contained in an H-type electrochemical cell.The solution contained in one cell acts as a cathode,and in the other as an anode.Experiments are carried out to directly visualize the formation process of gold nanoparticles(Au NPs)in separated cells of the H-type electrochemical reactor.The results and analyzes suggest that hydrogen peroxide and hydrated electrons generated from the plasma-liquid interactions play the roles of reductants in the solutions,respectively.Hydrogen peroxide can be generated in the case of the liquid being a cathode or an anode,while most of hydrated electrons are formed in the case of the liquid being an anode.Therefore,the reduction of the AuCl_(4)−ions is mostly attributed to the hydrogen peroxide as the liquid acts as a cathode,while to the hydrogen peroxide and hydrated electrons as the liquid acts as an anode.Moreover,the p H value of the solution can be used to tune the formation processes and final form of the Au NPs due to its mediation of reductants.
作者
刘钊源
陈强
柳清伙
欧思聪
Zhaoyuan LIU;Qiang CHEN;Qinghuo LIU;Kostya(Ken)OSTRIKOV(Shenzhen Research Institute of Xiamen University,Institute of Electromagnetics and Acoustics,Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance,Key Laboratory of Electromagnetic Wave Science and Detection Technology,Xiamen University,Xiamen 361005,People’s Republic of China;Department of Electrical and Computer Engineering,Duke University,Durham,NC 27708,United States of America;School of Chemistry and Physics,Queensland University of Technology,Brisbane,Queensland 4000,Australia)
基金
the Basic Research Program of Science and Technology of Shenzhen, China (No. JCYJ20190809162617137)
National Natural Science Foundation of China (No. 52077185) for partial financial support
the Australian Research Council (ARC)
QUT Center for Materials Science for partial support
