DataVXACS NanoPaper
journal article·2023-04-11

Electrically Modulated Nanofiltration Membrane Based on an Arch-Bridged Graphene Structure for Multicomponent Molecular Separation

Tiantian Gao, Yeye Wen, Chun Li, Huhu Cheng, Xiao-Rui Jin, Xinyu Ai, Yongan Yang, Kai-Ge Zhou, Liangti Qu

ACS Nano· Volume 17· Issue 7
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Source abstract

Abstract

Tunable regulation of molecular penetration through porous membranes is highly desirable for membrane applications in the pharmaceutical and medical fields. However, in most previous reports additional reagents or components are usually needed to provide the graphene-based membranes with responsiveness. Herein, we report tunable arch-bridged reduced graphene oxide (rGO) nanofiltration membranes modulated by the applied voltage. Under a finite voltage of 5 V, the rGO membrane could completely reject organic/anionic molecules. With assistance of the voltage, the positive-charge-modified rGO membrane realized the universal rejection of both cationic and anionic dyes, also showing the valid modulation in harsh organic solvents. The efficient electrical modulation depended on the synergetic effects of Donnan repulsion and size exclusion, benefiting from the electric field enhancement in arch-bridged rGO structures. Furthermore, multicomponent separation was achieved by our electrically modulated rGO-based membranes, demonstrating their potential in practical applications such as pharmaceutical industries.
Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Membrane Separation Technologies · Graphene research and applications · Nanopore and Nanochannel Transport Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Molecular Plus, Department of Chemistry, Tianjin University, Tianjin 300072, People’s Republic of China

Key Laboratory of Organic Optoelectronics & Molecular Engineering, Ministry of Education, Department of Chemistry, Laboratory of Flexible Electronics Technology, Tsinghua University, Beijing 100084, People’s Republic of China

Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, People’s Republic of China

State Key Laboratory of Tribology in Advanced Equipment (SKLT), Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Tsinghua-Foshan Innovation Special Fund · Key Laboratory of Special Function Materials and Structure Design of the Ministry of Education, Lanzhou University · Haihe Laboratory of Sustainable Chemical Transformations

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