文献类型：期刊文献

英文题名：Synthesis and adsorption properties of sulfydryl-functionalized graphene oxide composite

作者：Yang, Ming[1,2];Geng, Xu[1,2];Xi, Yongqing[3];Zhang, Fenfen[1]

机构：[1]Donghua Univ, Res Ctr Anal & Measurement, 2999 North Renmin Rd, Shanghai 201620, Peoples R China;[2]Donghua Univ, Sch Environm Sci & Engn, 2999 North Renmin Rd, Shanghai 201620, Peoples R China;[3]East China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China

年份：2025

卷号：323

外文期刊名：DESALINATION AND WATER TREATMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001513400900001)】；

基金：We are grateful for the financial support by the National Natural Science Foundation of China (Grant No. 51603040) and the Funda-mental Research Funds for the Central Universities (Grant No. 15D110556 and 15D122802) .

语种：英文

外文关键词：Sulfydryl; Graphene oxide; Ag (I) ions; Selective adsorption

摘要：The ions grasp effect of graphene oxide (GO) has long been researched for its rich chemical groups, however, the selective adsorption effect is limited. In order to further improve its adsorption capacity, sulfydryl-functionalized graphene oxide (SFGO) composite was prepared by (3-Mercaptopropyl) trimethoxysilane (MPTMS) with graphene oxide in one pot. Factors affecting its adsorption performance, including adsorbent dose, temperature, concentration of adsorbent solution, and adsorption time have been systematically investigated. Results revealed that SFGO can capture Ag (I) ions quickly with the maximal adsorption performance of 191.46 mg g-1. Sulfydryl group plays a crucial role in ultrahigh capture of Ag (I) ions from multi-element solution by chelating mechanisms. The adsorption isotherm fitting outcomes reveal that, the process conforms to the Langmuir isotherm pattern and obeys the pseudo-second-order kinetic pattern, it is spontaneous and exothermic. What's more, as one of the precious metals, silver could be selectively extracted from complicated system through SFGO, revealing the superior selection of this material for precious metals. Therefore, the prepared SFGO will have broad prospects for environmental cleanup and recovery of precious metal due to it's simple, economical and green synthesis method as well as promising efficiency.