journal article·2025-04

Enhanced Conductivity in Conjugated Microporous Polymers via Integrating of Carbon Nanotubes for Ultrasensitive NO 2 Chemiresistive Sensor

Weisi He, Qian‐Wen Li, Sijie Chen, He Liu, Zhonghua Cheng, Shuang Li, Wei Lyu, Gang Xu, Yong‐Jun Chen, Yaozu Liao

Small· Volume 21· Issue 13
Publisher page

Abstract

Abstract Conjugated microporous polymers (CMPs) present high promise for chemiresistive gas sensing owing to their inherent porosities, high surface areas, and tunable semiconducting properties. However, the poor conductivity hinders their widespread application in chemiresistive sensing. In this work, three typical CMPs (PSATA, PSATB, and PSATT) are synthesized and their chemiresistive gas sensing performance is investigated for the first time. To further improve performance, PSATT are modified on the surface of amino‐functionalized multi‐walled carbon nanotubes (NH 2 ‐MWCNTs) to improve the conductivity. As a result, the obtained material, PSATT‐7NC exhibited a high sensitivity of 9766% toward 4 ppm NO 2 , which is 2.5 times higher than that of pristine PSATT. It also demonstrated remarkable selectivity and excellent long‐term stability. Furthermore, the lowest limit of detection (0.79 ppb) among all polymers‐based sensors is achieved at a low operating temperature of 100 °C. This work provides a valuable strategy into the development of a new material platform for advancing high‐performance gas sensing applications.
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Research context

OpenAlex topics: Covalent Organic Framework Applications · Gas Sensing Nanomaterials and Sensors · Conducting polymers and applications

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

Affiliations

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China

State Key Laboratory of Structural Chemistry Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen Energy Fujian Institute of Research on the Structure of Matter the Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. China

College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China

University of Chinese Academy of Sciences (UCAS) Beijing 100049 P. R. China

Funding

National Key Research and Development Program of China · Program of Shanghai Academic Research Leader · China Postdoctoral Science Foundation · State Key Laboratory for Modification of Chemical Fibers and Polymer Materials · Natural Science Foundation of Shanghai Municipality · Changjiang Scholar Program, Ministry of Education · National Natural Science Foundation of China

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