Control the growth of Fe3O4 on the surface of saponite and its redox effect on Cr（VI）

作     者：Ritong Huang Limei Wu Xiao Li Ning Tang Xiaolong Wang Lili Gao Ritong Huang;Limei Wu;Xiao Li;Ning Tang;Xiaolong Wang;Lili Gao

作者机构：School of Materials Science and Engineering Shenyang Jianzhu University School of Mechanical Engineering Shenyang Jianzhu University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2023年第33卷第5期

页      面：701-709页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：jointly supported by National Natural Science Foundation of China (42202042 and 52278453) Liaoning Province“Xingliao talent plan project”(XLYC2007105) Projects of the Educational Department of Liaoning Province (LJKZ0594) Foundation of Key Laboratory of Clay Mineral Applied Research of Gansu Province (CMAR-2022-02) 

主　　题：Fe3O4 Saponite Oxygen vacancy Redox Cr (VI) 

摘      要：In this paper, Magnetite/Saponite（Fe3O4/Sap） composites were prepared by hydrothermal synthesis and coprecipitation. The prepared Fe3O4/sap composites had high purity and good crystallinity, and nano-Fe3O4was uniformly dispersed on the surface of saponite. Moreover, the removal efficiency of Fe3O4/Sap composites for Cr（VI） in water was evaluated. This study revealed the existence of abundant oxygen vacancies and hydroxyl groups on the surface of Saponite. During the synthesis of Fe3O4on the surface of Sap, the multi-directional crystallization can be controlled to increase the reaction activity of the system. Besides, the prepared Fe3O4/Sap composites provided more reactive edges compared to Fe3O4in the process of removing Cr（VI）. The removal amount of Cr（VI） was found to be 17.95 mg/g. The successful preparation of the Fe3O4/Sap composites and the revelation of the Cr（VI） adsorption mechanism are of great significance for the efficient and green removal of heavy metal pollutants in sewage.