Gravity-driven catalytic nanofibrous membrane with microsphere and nanofiber coordinated structure for ultrafast continuous reduction of 4-nitrophenol

Jianwei Wang; Xiaoqiang Pei; Ge Liu; Jianfeng Bai; Yajie Ding; Jianqiang Wang; Fu Liu

doi:10.1016/j.jcis.2018.11.086

Gravity-driven catalytic nanofibrous membrane with microsphere and nanofiber coordinated structure for ultrafast continuous reduction of 4-nitrophenol

J Colloid Interface Sci. 2019 Mar 7:538:108-115. doi: 10.1016/j.jcis.2018.11.086. Epub 2018 Nov 23.

Authors

Jianwei Wang¹, Xiaoqiang Pei², Ge Liu², Jianfeng Bai³, Yajie Ding⁴, Jianqiang Wang⁵, Fu Liu⁶

Affiliations

¹ Polymer and Composite Division, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China; Shanghai Collaborative Innovation Centre for WEEE Recycling, WEEE Research Center of Shanghai Polytechnic University, Shanghai 201209, PR China.
² Key Laboratory of Healthy & Intelligent Kitchen System Integration of Zhejiang Province, Ningbo Fotile Kitchen Ware Company, Ningbo 315201, PR China.
³ Shanghai Collaborative Innovation Centre for WEEE Recycling, WEEE Research Center of Shanghai Polytechnic University, Shanghai 201209, PR China.
⁴ Polymer and Composite Division, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China.
⁵ Polymer and Composite Division, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China. Electronic address: wangjianqiang@nimte.ac.cn.
⁶ Polymer and Composite Division, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China. Electronic address: fu.liu@nimte.ac.cn.

PMID: 30502531
DOI: 10.1016/j.jcis.2018.11.086

Abstract

Silver loaded nanofibrous membrane with high catalytic performance for 4-nitrophenol under continuous gravity-driven filtration was developed in this study. A polydopamine (PDA) microsphere and nanofiber coordinated composite structure was fabricated through an in situ PDA synthesis to achieve a high catalyst loading and controllable residence time of 4-nitrophenol. The incorporated PDA microspheres played an important role for the enhancement of catalytic performance due to the increased surface area (23% increase compared with PAN and PAN-PDAs-Ag) and reduced membrane porosity. Silver loading amount and the residence time of 4-nitrophenol was increased by more than 108% (from 1.2 wt% to 2.5 wt%) and 45% (from 0.79 s to 1.15 s) when comparing with PAN-PDAc-Ag and PAN-PDAs-Ag nanofibrous membrane. The conversion rate of 4-nitrophenol in a gravity-driven filtration process was as high as 97% when PAN-PDAs-Ag nanofibrous membrane was used, which was much higher than the PAN-PDAc-Ag membrane (80%). In addition, the PAN-PDAs-Ag nanofibrous membrane exhibited excellent recycle performance, the conversion rate was maintained as high as 93% after five times of reuse. The microsphere and nanofiber coordinated structure with enhanced surface area and controllable residence time of contaminants proposed in this study might advance the real applications of electrospun nanofibrous membrane for catalytic removal of contaminants.

Keywords: Catalysis; Gravity-driven filtration; Nanofibrous membrane; Polydopamine microsphere.