查找使用阿拉丁产品的科研文献

Microwave-assisted rapid growth of corncob-like nano-Ag2O/ZIF-8 on PAN electrospinning nanofibers enabled highly efficient selective adsorption desulfurization

Qiang Le,Zhilin Cheng

The higher energy consumption and processing cost greatly constricted the extensive application of the adsorption desulfurization technique. Herein, the nano-Ag 2 O/ZIF-8@ polyacrylonitrile (PAN) nanofiber membrane (NFM) was successfully made by using electrospinning and microwave-assisted synthesis. The characterizations demonstrated that the nano-Ag 2 O-dotted ZIF-8 with the exclusive corncob-like structure uniformly grew on the surface of PAN nanofiber. The in-situ fabrication of nano-Ag 2 O/ZIF-8 on the surface of PAN nanofiber was rapidly realized by microwave-assisted method, thus resulting in the less loss of the mechanical performance of NFM. The tests indicated that the tensile strength and young's modulus of Ag 2 O/ZIF-8@PAN NFM were 35 % and 185 % higher than PAN NFM, respectively. The fabrication of the multi-pore structure endowed the Ag 2 O/ZIF-8@PAN NFM to achieve the superior adsorption performance for thiophene (TH) from fuel oil, having the increase by 312 % and 175 % in the batch adsorption (maximum: 37.142 mg·g −1 ) and fixed-bed breakthrough adsorption (maximum: 35.423 mg·g −1 ) capacities compared to PAN NFM, respectively. Furthermore, the saturated adsorption capacity of Ag 2 O/ZIF-8@PAN NFM in fixed-bed adsorption experiment was higher than those of Cu 2 O-doped PAN NFM (4.571 mg·g −1 ) and Ag 2 O@HNTs-doped PAN NFM (31.982 mg·g −1 ) reported by our previous study. The adsorption mechanism of TH molecules on the Ag 2 O/ZIF-8@PAN NFM was explored by the kinetics, intra-particle diffusion, isotherms and thermodynamic models, which affirmed to exist the synergistic effect of physical adsorption, and chemical adsorption including π-complexation interaction and S-M interaction adsorption. Finally, this work provided a novel prospective adsorption desulfurization based on the membrane separation.