Sphagnum Inspired g-C 3 N 4 Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight-Driven Water Purification.

Autor: Ji L; Polymer Materials & Engineering Department, School of Materials Science & Engineering, Chang'an University, Xian, 710064, China., Yan L; Polymer Materials & Engineering Department, School of Materials Science & Engineering, Chang'an University, Xian, 710064, China., Chao M; Polymer Materials & Engineering Department, School of Materials Science & Engineering, Chang'an University, Xian, 710064, China., Li M; Polymer Materials & Engineering Department, School of Materials Science & Engineering, Chang'an University, Xian, 710064, China., Gu J; Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science, Ningbo, 315201, China.; School of Chemical Sciences, University of Chinese Academy of Science, Beijing, 100049, China., Lei M; Polymer Materials & Engineering Department, School of Materials Science & Engineering, Chang'an University, Xian, 710064, China., Zhang Y; Polymer Materials & Engineering Department, School of Materials Science & Engineering, Chang'an University, Xian, 710064, China., Wang X; Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China., Xia J; Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science, Ningbo, 315201, China., Chen T; Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science, Ningbo, 315201, China., Nie Y; Fujian Province University Key Laboratory of Modern Analytical Science and Separation Technology, College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou, 363000, China., Chen T; Polymer Materials & Engineering Department, School of Materials Science & Engineering, Chang'an University, Xian, 710064, China.; Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science, Ningbo, 315201, China.; School of Chemical Sciences, University of Chinese Academy of Science, Beijing, 100049, China.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2021 Mar; Vol. 17 (12), pp. e2007122. Date of Electronic Publication: 2021 Feb 15.
DOI: 10.1002/smll.202007122
Abstrakt: Membrane separation is recognized as one of the most effective strategies to treat the complicated wastewater system for economic development. However, serious membrane fouling has restricted its further application. Inspired by sphagnum, a 0D/2D heterojunction composite membrane is engineered by depositing graphitic carbon nitride nano/microspheres (CNMS) with plentiful wrinkles onto the polyacrylic acid functionalized carbon nanotubes (CNTs-PAA) membrane through hydrogen bond force. Through coupling unique structure and chemistry properties, the CNTs-PAA/CNMS heterojunction membrane presents superhydrophilicity and underwater superoleophobicity. Furthermore, thanks to the J-type aggregates during the solvothermal process, it is provided with a smaller bandgap (1.77 eV) than the traditional graphitic carbon nitride (g-C 3 N 4 ) sheets-based membranes (2.4-2.8 eV). This feature endows the CNTs-PAA/CNMS membrane with superior visible-light-driven self-cleaning ability, which can maintain its excellent emulsion separation (with a maximum flux of 5557 ± 331 L m -2 h -1 bar -1 and an efficiency of 98.5 ± 0.6%), photocatalytic degradation (with an efficiency of 99.7 ± 0.2%), and antibacterial (with an efficiency of ≈100%) ability even after cyclic experimental processes. The excellent self-cleaning performance of this all-in-one membrane represents its potential value for water purification.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: