期刊
APPLIED SURFACE SCIENCE
卷 551, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.149466
关键词
Dithiocarbamate chitosan; Sphalerite; Cu-activated; Chemical adsorption
类别
资金
- National Natural Science Foundation of China [51764037]
- University-Enterprise Cooperation Fund from Yunnan Copper Group [KKZ4201521003]
- Scholar Development Project of Yunnan Province [KKSY201421110]
Density functional theory was utilized to study the adsorption of DTC-CTS on different surfaces, revealing that adsorption on Cu-activated sphalerite surface is easier and more stable.
Density functional theory (DFT) was used to simulate the adsorption of dithiocarbamate chitosan (DTC-CTS) on sphalerite (110) and Cu-activated sphalerite (110) surfaces in the presence and absence of water molecules. The results show that the adsorption of DTC-CTS on sphalerite (110) and Cu-activated sphalerite (110) surfaces in the absence of water are physical adsorption and chemical adsorption, respectively. It indicates that the adsorption capacity of DTC-CTS on sphalerite surface is enhanced obviously after being activated by Cu. That's because DTC-CTS is easier to adsorb on Cu. Besides, the replacement of Zn by Cu on sphalerite (110) surface further enhanced the adsorption ability of DTC-CTS onto S of sphalerite surface. However, the presence of water molecules has little effect on the adsorption of DTC-CTS on sphalerite (110) and Cu-activated sphalerite (110) surfaces. The results of Density of states (DOS) and Mulliken population analysis also confirmed that the adsorption of DTC-CTS on Cu-activated sphalerite (110) surface is easier and more stable than that of sphalerite (110) surface.
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