ZnxIn2S3+x Photocatalyst Prepared by Hydrothermal Method for Water-Splitting Reaction to Produce Hydrogen under Visible Light

• Main Authors: Xiao-long Wang, 王蕭隆
• Other Authors: Ien-whei Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/14486374469346455211

碩士 === 大同大學 === 化學工程學系(所) === 100 === The preparation of photocatalyst ZnXIn2S3+X is by means of the Hydrothermal Method. In this method, different composition proportions of ZnSO4˙7H2O, InCl3˙4H2O, CH3CSNH2 are mixed, according to the stoichiometric quantities. Deionic water of pH value of 2, adjusted with H2SO4 is added, and the temperature is increased at the increasing rate of 1℃/min to the temperature required for the reaction. After maintaining for 6 hours, the product is cooled by natural cooling to room temperature, and after being washed with deionic water for several times, and carrying out the vacuum drying. Catalyst powder of ZnXIn2S3+X of orange yellow color are prepared. Finally, cocatalyst Pt(1.0wt%) is loaded on catalyst ZnXIn2S3+X by the impregnation method, then photocatalysts of Pt(1.0wt%)/ZnXIn2S3+X are obtained. The preparation of photocatalysts ZnXIn2S3+X prepared are analyzed by means of the XRD, UV-vis, SEM, EDS. From XRD results, it is known that the photocatalysts ZnXIn2S3+X which are prepared at 160℃ possess the best crystalline structures; From UV-vis results, it is known that with the increase of X values of photocatalysts ZnXIn2S3+X, the critical wavelength show distin purple transition; From SEM results, it is known that the grains of photocatalyst powder of Zn2In2S5 at 160℃ possess smaller and more uniform particle diameter; From EDS results, it is known that the compositions of photocatalyst powder are identified and confirmed to be ZnXIn2S3+X.The water-splitting reaction results show that the photocatalyst of Pt(1.0wt%)/Zn2In2S5 at 160℃ possess the highest activility, and that its hydrogen producing rate is 803.4μmol/hr.