AFM study on the adsorption of Hg2+ on natural molybdenum disulfide in aqueous solutions

作者：Jia, Feifei; Zhang, Xian; Song, Shaoxian^*

来源：Physical Chemistry Chemical Physics, 2017, 19(5): 3837-3844.

DOI：10.1039/c6cp07302f

• MERCURY REMOVAL
• SOFT ACIDS
• WATER
• MOS2
• HARD

The adsorption of Hg2+ on natural molybdenum disulfide has been studied using atomic force microscope (AFM). The AFM imaging clearly illustrated the adsorption of Hg2+ on the surface of molybdenum disulfide, and also hydration layers on the surfaces. It was found that the presence of a hydration layer on molybdenum disulfide surfaces hindered the Hg2+ adsorption. Also, it was observed that the Hg2+ adsorbed appeared in the form of multilayers. The first adsorbed Hg2+ layer might be mainly attributed to the complexation of Hg2+ with S atoms exposed on molybdenum disulfide surfaces, while the second one might be due to the electrostatic interaction between negatively charged molybdenum disulfide and the cation Hg2+.

• 出版日期2017-2-7
• 单位武汉理工大学