High Surface Area MoS2/Graphene Hybrid Aerogel for Ultrasensitive NO2 Detection
- Univ. of California, Berkeley, CA (United States). Berkeley Sensor & Actuator Center; Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering; Huazhong Univ. of Science and Technology, Wuhan (China)
- Univ. of California, Berkeley, CA (United States). Berkeley Sensor & Actuator Center; Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Physics; Univ. of California, Berkeley, CA (United States). Kavli Energy NanoSciences Inst.
- Huazhong Univ. of Science and Technology, Wuhan (China)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
A MoS 2 /graphene hybrid aerogel synthesized with two-dimensional MoS 2 sheets coating a high surface area graphene aerogel scaffold is characterized and used for ultrasensitive NO 2 detection. The combination of graphene and MoS 2 leads to improved sensing properties with the graphene scaffold providing high specific surface area and high electrical and thermal conductivity and the single to few-layer MoS 2 sheets providing high sensitivity and selectivity to NO 2 . The hybrid aerogel is integrated onto a low-power microheater platform to probe the gas sensing performance. At room temperature, the sensor exhibits an ultralow detection limit of 50 ppb NO 2 . By heating the material to 200 °C, the response and recovery times to reach 90% of the final signal decrease to < 1 min, while retaining the low detection limit. The MoS 2 /graphene hybrid also shows good selectivity for NO 2 against H 2 and CO, especially when compared to bare graphene aerogel. The unique structure of the hybrid aerogel is responsible for the ultrasensitive, selective, and fast NO 2 sensing. The improved sensing performance of this hybrid aerogel also suggests the possibility of other 2D material combinations for further sensing applications.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); China Scholarship Council; US Air Force Office of Scientific Research (AFOSR)
- Grant/Contract Number:
- AC52-07NA27344; AC02-05CH11231; FA9550-14-1-0323; IIP 1444950
- OSTI ID:
- 1410012
- Alternate ID(s):
- OSTI ID: 1440935
- Report Number(s):
- LLNL-JRNL-702422
- Journal Information:
- Advanced Functional Materials, Vol. 26, Issue 28; ISSN 1616-301X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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