Three-Dimensional Graphene-Based Foams with “Greater Electron Transferring Areas” Deriving High Gas Sensitivity
Source abstract
Abstract
Graphene foams are promising three-dimensional (3D) architectures with the combination of the intrinsic nature of graphene and unique cellular structures for various realms. Herein, a facile technique is developed by combining supramolecular assembly with lyophilization to functionalize graphene with donor−π-acceptor (D−π-A) molecules and then massively transform the two-dimensional (2D) plane nanosheets into 3D foams. The as-prepared gas sensors work at room temperature (RT) and reveal comprehensive gas sensing performance with an ultrahigh response (Ra/Rg = 3.2, 10 ppm), excellent selectivity, and reliable repeatability toward NO2. Notably, a gas sensing enhancement mechanism with density functional theory (DFT) calculations is proposed to unravel the synergetic effect of the “Greater Electron Transferring Area” and the specific 3D foam structure for the enhancement of charge transfer and NO2 adsorption. The combination of supramolecular assembly and the lyophilization technique provides a strategy to prepare 3D architectural graphene-based materials for high-performance gas sensors and chemical trace detectors.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Covalent Organic Framework Applications · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Center for International Research on Green Optoelectronics, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, P. R. China
Promising Centre for Sensors and Electronic Devices, Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 11001, Kingdom of Saudi Arabia
BE Lab, Delft University of Technology, Delft 2628 CD, The Netherlands
Funding
National Natural Science Foundation of China · Innovative Team Project of Education Bureau of Guangdong Province · Startup Foundation from SCNU · Guangdong Provincial Key Laboratory of Optical Information Materials and Technology · Science and Technology Program of Guangzhou · Guangdong Basic and Applied Basic Research Foundation · Guangdong Recruitment Program of Foreign Experts
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