High-performance H 2 S gas sensor utilizing MXene/MoS 2 heterostructure synthesized via the Langmuir-Blodgett technique and chemical vapor deposition.

Autor: Shin JH; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr., Jo SH; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr., Rhyu H; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr., Park C; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr., Kang MH; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr., Song W; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr., Lee SS; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr., Lim J; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr., Myung S; Thin Film Materials Research Group, Korea Research Institute of Chemical Technology Daejeon 34114 South Korea mh0827@krict.re.kr msung@krict.re.kr.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2024 Nov 26; Vol. 14 (51), pp. 37781-37787. Date of Electronic Publication: 2024 Nov 26 (Print Publication: 2024).
DOI: 10.1039/d4ra07555b
Abstrakt: In this study, we developed an H 2 S gas sensor based on a MXene/MoS 2 heterostructure, using the Langmuir-Blodgett (LB) technique and chemical vapor deposition (CVD). Ti 3 C 2 T x MXene nanosheets were uniformly transferred onto SiO 2 /Si substrates via the LB technique, achieving near-complete coverage. Subsequently, flower-like MoS 2 was grown on the MXene-coated substrate through CVD, with vertical growth observed on the MXene layers. Our hybrid sensors exhibited a significant enhancement in gas response, with the MXene/MoS 2 heterostructure showing a response of 0.5 to H 2 S - approximately five times greater than that of pristine MXene. This improvement is attributed to the formation of a heterojunction, which increases electron mobility and reduces the depletion layer, enabling more efficient gas detection. Furthermore, the sensor demonstrated excellent selectivity for H 2 S over other gases, including H 2 , NO 2 , NH 3 , NO, and VOCs. The combination of the LB technique and CVD not only enhances gas sensor performance but also offers a promising strategy for synthesizing materials for various electrochemical applications.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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