| Title: | Acetone adsorption capacity of sulfur-doped microporous activated carbons prepared from polythiophene |
| Author(s): | Zhu J; Chen R; Zeng Z; Su C; Zhou K; Mo Y; Guo Y; Zhou F; Gao J; Li L; |
| Address: | "School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China. School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China. liqingli@hotmail.com" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-019-05051-y |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "Sulfur-doped activated carbons (SACs) with high sulfur content and large specific surface area were synthesized from polythiophene for acetone removal. The sulfur content of carbons (3.10-8.43 at.%) could be tunable by adjusting the activation temperature. The BET surface area and pore volume of the obtained samples were 916-2020 m(2) g(-1) and 0.678-1.100 cm(3) g(-1), with a significant proportion of microporosity (up to 84% and 72% for BET surface area and pore volume, respectively). The resulting SACs show a superior acetone adsorption capacity (i.e., 716.4 mg g(-1) at 15 degrees C and 705 mg g(-1) at 25 degrees C for SAC700). In terms of the adsorption behavior of acetone on the activated carbons, compared to the Langmuir model, the Langmuir-Freundlich model showed better agreement with the adsorption amount. The results reveal that the surface area and micropore volume are the key factors for acetone adsorption, while the sulfur-doped functional groups, especially oxidized sulfur functional groups, can enhance the acetone adsorption capacity at a certain low pressure. Temperature programmed desorption (TPD) experiments were performed to get desorption activation energy of acetone on SAC samples, and the results ranged from 23.54 to 38.71 kJ mol(-1). The results of the molecular simulation show that the introduction of sulfur element can increase the binding energy between acetone molecule and carbon surface, and the tri-oxidized sulfur (sulfonic acid) functional group has the highest binding energy of - 0.4765 eV. Graphical abstract" |
| Keywords: | Acetone/*chemistry Adsorption Carbon/chemistry Charcoal/*chemistry Polymers/*chemistry Porosity Sulfur/*chemistry Surface Properties Temperature Thiophenes/*chemistry Volatile Organic Compounds/chemistry/isolation & purification Acetone adsorption Activat; |
| Notes: | "MedlineZhu, Junchao Chen, Ruofei Zeng, Zheng Su, Changqing Zhou, Ke Mo, Yamian Guo, Yang Zhou, Fan Gao, Jie Li, Liqing eng 21878338/National Nature Science Foundation of China/ 2018SK2038/Key Research and Development Project of Hunan Province, China/ Germany 2019/04/12 Environ Sci Pollut Res Int. 2019 Jun; 26(16):16166-16180. doi: 10.1007/s11356-019-05051-y. Epub 2019 Apr 10" |
