Controllable synthesis of MoS                         2                         @MoO                         2                          nanonetworks for enhanced NO                         2                          room temperature sensing in air

Muhammad Ikram; Lujia Liu; Yang Liu; Mohib Ullah; Laifeng Ma; Syed Ul Hasnain Bakhtiar; Hongyuan Wu; Haitao Yu; Ruihong Wang; Keying Shi

doi:10.1039/c9nr00137a

Controllable synthesis of MoS ₂ @MoO ₂ nanonetworks for enhanced NO ₂ room temperature sensing in air

Muhammad Ikram
, Lujia Liu
, Yang Liu
, Mohib Ullah
, Laifeng Ma
, Syed Ul Hasnain Bakhtiar
, Hongyuan Wu
, Haitao Yu
, Ruihong Wang^*
, Keying Shi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

MoS ₂ nanosheets (NSs) are a promising gas sensing material at room temperature (RT) due to their unique properties and structures. Unfortunately, the activity of pure MoS ₂ NSs is highly affected by the adsorption of atmospheric oxygen, which strongly influences the stability of MoS ₂ sensing devices and significantly hinders the practical applications of these sensors in air. Heterostructure formation may be an effective approach to modulate the intrinsic electronic properties of MoS ₂ NSs. In this study, thin MoO ₂ nanoplates (NPs) were decorated with multilayer MoS ₂ NSs via one-step controllable sulfurization to fabricate MoS ₂ @MoO ₂ nanonetworks, and remarkable gas sensing performance was achieved with high stability in air at RT. In particular, the MSO-2 (1 h sulfurization of the MoO ₂ NPs) nanonetworks with n-p heterojunctions demonstrated a high response of 19.4 to 100 ppm NO ₂ in a short period of time (1.06 s) with rapid recovery (22.9 s) to the baseline. The excellent gas sensing performance of the MSO-2 sensor is attributed to the synergistic effect of the MoS ₂ NSs and thin MoO ₂ NPs, which created heterojunctions/defects to easily transfer electrons and provide more active sites for NO ₂ gas. This simple synthetic method to design and fabricate n-p heterojunction sensors will be effective in commercial gas sensing applications.

Original language	English
Pages (from-to)	8554-8564
Number of pages	11
Journal	Nanoscale
Volume	11
Issue number	17
DOIs	https://doi.org/10.1039/c9nr00137a
State	Published - 7 May 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2019.

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1039/c9nr00137a

Cite this

Ikram, M., Liu, L., Liu, Y., Ullah, M., Ma, L., Bakhtiar, S. U. H., Wu, H., Yu, H., Wang, R., & Shi, K. (2019). Controllable synthesis of MoS ₂ @MoO ₂ nanonetworks for enhanced NO ₂ room temperature sensing in air Nanoscale, 11(17), 8554-8564. https://doi.org/10.1039/c9nr00137a

Ikram, Muhammad ; Liu, Lujia ; Liu, Yang et al. / Controllable synthesis of MoS ₂ @MoO ₂ nanonetworks for enhanced NO ₂ room temperature sensing in air In: Nanoscale. 2019 ; Vol. 11, No. 17. pp. 8554-8564.

@article{b4d592b7625f4eb98e85c01ec415cd96,

title = " Controllable synthesis of MoS 2 @MoO 2 nanonetworks for enhanced NO 2 room temperature sensing in air ",

abstract = " MoS 2 nanosheets (NSs) are a promising gas sensing material at room temperature (RT) due to their unique properties and structures. Unfortunately, the activity of pure MoS 2 NSs is highly affected by the adsorption of atmospheric oxygen, which strongly influences the stability of MoS 2 sensing devices and significantly hinders the practical applications of these sensors in air. Heterostructure formation may be an effective approach to modulate the intrinsic electronic properties of MoS 2 NSs. In this study, thin MoO 2 nanoplates (NPs) were decorated with multilayer MoS 2 NSs via one-step controllable sulfurization to fabricate MoS 2 @MoO 2 nanonetworks, and remarkable gas sensing performance was achieved with high stability in air at RT. In particular, the MSO-2 (1 h sulfurization of the MoO 2 NPs) nanonetworks with n-p heterojunctions demonstrated a high response of 19.4 to 100 ppm NO 2 in a short period of time (1.06 s) with rapid recovery (22.9 s) to the baseline. The excellent gas sensing performance of the MSO-2 sensor is attributed to the synergistic effect of the MoS 2 NSs and thin MoO 2 NPs, which created heterojunctions/defects to easily transfer electrons and provide more active sites for NO 2 gas. This simple synthetic method to design and fabricate n-p heterojunction sensors will be effective in commercial gas sensing applications.",

author = "Muhammad Ikram and Lujia Liu and Yang Liu and Mohib Ullah and Laifeng Ma and Bakhtiar, \{Syed Ul Hasnain\} and Hongyuan Wu and Haitao Yu and Ruihong Wang and Keying Shi",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2019.",

year = "2019",

month = may,

day = "7",

doi = "10.1039/c9nr00137a",

language = "English",

volume = "11",

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journal = "Nanoscale",

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Ikram, M, Liu, L, Liu, Y, Ullah, M, Ma, L, Bakhtiar, SUH, Wu, H, Yu, H, Wang, R & Shi, K 2019, ' Controllable synthesis of MoS ₂ @MoO ₂ nanonetworks for enhanced NO ₂ room temperature sensing in air ', Nanoscale, vol. 11, no. 17, pp. 8554-8564. https://doi.org/10.1039/c9nr00137a

Controllable synthesis of MoS ₂ @MoO ₂ nanonetworks for enhanced NO ₂ room temperature sensing in air . / Ikram, Muhammad; Liu, Lujia; Liu, Yang et al.
In: Nanoscale, Vol. 11, No. 17, 07.05.2019, p. 8554-8564.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Controllable synthesis of MoS 2 @MoO 2 nanonetworks for enhanced NO 2 room temperature sensing in air

AU - Ikram, Muhammad

AU - Liu, Lujia

AU - Liu, Yang

AU - Ullah, Mohib

AU - Ma, Laifeng

AU - Bakhtiar, Syed Ul Hasnain

AU - Wu, Hongyuan

AU - Yu, Haitao

AU - Wang, Ruihong

AU - Shi, Keying

PY - 2019/5/7

Y1 - 2019/5/7

N2 - MoS 2 nanosheets (NSs) are a promising gas sensing material at room temperature (RT) due to their unique properties and structures. Unfortunately, the activity of pure MoS 2 NSs is highly affected by the adsorption of atmospheric oxygen, which strongly influences the stability of MoS 2 sensing devices and significantly hinders the practical applications of these sensors in air. Heterostructure formation may be an effective approach to modulate the intrinsic electronic properties of MoS 2 NSs. In this study, thin MoO 2 nanoplates (NPs) were decorated with multilayer MoS 2 NSs via one-step controllable sulfurization to fabricate MoS 2 @MoO 2 nanonetworks, and remarkable gas sensing performance was achieved with high stability in air at RT. In particular, the MSO-2 (1 h sulfurization of the MoO 2 NPs) nanonetworks with n-p heterojunctions demonstrated a high response of 19.4 to 100 ppm NO 2 in a short period of time (1.06 s) with rapid recovery (22.9 s) to the baseline. The excellent gas sensing performance of the MSO-2 sensor is attributed to the synergistic effect of the MoS 2 NSs and thin MoO 2 NPs, which created heterojunctions/defects to easily transfer electrons and provide more active sites for NO 2 gas. This simple synthetic method to design and fabricate n-p heterojunction sensors will be effective in commercial gas sensing applications.

AB - MoS 2 nanosheets (NSs) are a promising gas sensing material at room temperature (RT) due to their unique properties and structures. Unfortunately, the activity of pure MoS 2 NSs is highly affected by the adsorption of atmospheric oxygen, which strongly influences the stability of MoS 2 sensing devices and significantly hinders the practical applications of these sensors in air. Heterostructure formation may be an effective approach to modulate the intrinsic electronic properties of MoS 2 NSs. In this study, thin MoO 2 nanoplates (NPs) were decorated with multilayer MoS 2 NSs via one-step controllable sulfurization to fabricate MoS 2 @MoO 2 nanonetworks, and remarkable gas sensing performance was achieved with high stability in air at RT. In particular, the MSO-2 (1 h sulfurization of the MoO 2 NPs) nanonetworks with n-p heterojunctions demonstrated a high response of 19.4 to 100 ppm NO 2 in a short period of time (1.06 s) with rapid recovery (22.9 s) to the baseline. The excellent gas sensing performance of the MSO-2 sensor is attributed to the synergistic effect of the MoS 2 NSs and thin MoO 2 NPs, which created heterojunctions/defects to easily transfer electrons and provide more active sites for NO 2 gas. This simple synthetic method to design and fabricate n-p heterojunction sensors will be effective in commercial gas sensing applications.

UR - https://www.scopus.com/pages/publications/85064916658

U2 - 10.1039/c9nr00137a

DO - 10.1039/c9nr00137a

M3 - Article

C2 - 30990493

AN - SCOPUS:85064916658

SN - 2040-3364

VL - 11

SP - 8554

EP - 8564

JO - Nanoscale

JF - Nanoscale

IS - 17

ER -

Ikram M, Liu L, Liu Y, Ullah M, Ma L, Bakhtiar SUH et al. Controllable synthesis of MoS ₂ @MoO ₂ nanonetworks for enhanced NO ₂ room temperature sensing in air Nanoscale. 2019 May 7;11(17):8554-8564. doi: 10.1039/c9nr00137a