Enhanced Room-Temperature NH3-Sensing Performance of Ti3C2Tx  MXene Decorated with CeO2 Nanoparticles

Lizhai Zhang; Jiayuan Xu; Dingyuan Wang; Xinyu Lei; Henghui Sun; Yuhong Huang; Fei Ma; Taotao Ai; Paul K. Chu

doi:10.1021/acsanm.5c01721

Enhanced Room-Temperature NH₃-Sensing Performance of Ti₃C₂T_x MXene Decorated with CeO₂ Nanoparticles

Lizhai Zhang^*, Jiayuan Xu, Dingyuan Wang, Xinyu Lei, Henghui Sun, Yuhong Huang, Fei Ma, Taotao Ai^*, Paul K. Chu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

5 Citations (Scopus)

Abstract

2D MXenes have garnered enormous interest in the field of gas sensing. Unfortunately, the low stability, long recovery time, poor selectivity, and vulnerability to oxidation have hampered further development. Herein, Ti₃C₂T_x MXene is incorporated with CeO₂ nanoparticles to improve the detection of NH₃. Compared with Ti₃C₂T_x and CeO₂, the response of composite to 10 ppm of NH₃ is enhanced by 180% and 714% at room temperature, respectively, in addition to the excellent selectivity, fast response, and recovery rate. Based on the first-principles calculation, the CeO₂ nanoparticles form a multifunctional passivation layer to shield the MXene from oxidative degradation and also provide ample active sites to adsorb NH₃ gas to enhance the sensing ability. The results reveal an effective means of designing and developing high-performance room-temperature ammonia sensors. © 2025 American Chemical Society

Original language	English
Pages (from-to)	12090-12099
Number of pages	10
Journal	ACS Applied Nano Materials
Volume	8
Issue number	23
Online published	5 Jun 2025
DOIs	https://doi.org/10.1021/acsanm.5c01721
Publication status	Published - 13 Jun 2025

Funding

This work was jointly supported by the Natural Science Foundation of Shaanxi Province (2023-JC-QN-0476), the Shaanxi University of Technology Research Grant (no. SLGRCQD2207), the Scientific research project of Shaanxi Provincial Education Department (no. 23JK0375), the Science and technology program for overseas students of Shaanxi province (2023016), and the City University of Hong Kong Donation Research Grants (DON-RMG no.9229021 and 9220061).

Research Keywords

CeO2
Ti3C2Tx
heterojunction
room-temperaturegas sensor
first-principles calculation

RGC Funding Information

RGC-funded

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10.1021/acsanm.5c01721

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Cite this

@article{cdd502bce9b840218dcca10dff4ade91,

title = "Enhanced Room-Temperature NH3-Sensing Performance of Ti3C2Tx MXene Decorated with CeO2 Nanoparticles",

abstract = "2D MXenes have garnered enormous interest in the field of gas sensing. Unfortunately, the low stability, long recovery time, poor selectivity, and vulnerability to oxidation have hampered further development. Herein, Ti3C2Tx MXene is incorporated with CeO2 nanoparticles to improve the detection of NH3. Compared with Ti3C2Tx and CeO2, the response of composite to 10 ppm of NH3 is enhanced by 180% and 714% at room temperature, respectively, in addition to the excellent selectivity, fast response, and recovery rate. Based on the first-principles calculation, the CeO2 nanoparticles form a multifunctional passivation layer to shield the MXene from oxidative degradation and also provide ample active sites to adsorb NH3 gas to enhance the sensing ability. The results reveal an effective means of designing and developing high-performance room-temperature ammonia sensors. {\textcopyright} 2025 American Chemical Society",

keywords = "CeO2, Ti3C2Tx, heterojunction, room-temperaturegas sensor, first-principles calculation",

author = "Lizhai Zhang and Jiayuan Xu and Dingyuan Wang and Xinyu Lei and Henghui Sun and Yuhong Huang and Fei Ma and Taotao Ai and Chu, {Paul K.}",

year = "2025",

month = jun,

day = "13",

doi = "10.1021/acsanm.5c01721",

language = "English",

volume = "8",

pages = "12090--12099",

number = "23",

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TY - JOUR

T1 - Enhanced Room-Temperature NH3-Sensing Performance of Ti3C2Tx MXene Decorated with CeO2 Nanoparticles

AU - Zhang, Lizhai

AU - Xu, Jiayuan

AU - Wang, Dingyuan

AU - Lei, Xinyu

AU - Sun, Henghui

AU - Huang, Yuhong

AU - Ma, Fei

AU - Ai, Taotao

AU - Chu, Paul K.

PY - 2025/6/13

Y1 - 2025/6/13

N2 - 2D MXenes have garnered enormous interest in the field of gas sensing. Unfortunately, the low stability, long recovery time, poor selectivity, and vulnerability to oxidation have hampered further development. Herein, Ti3C2Tx MXene is incorporated with CeO2 nanoparticles to improve the detection of NH3. Compared with Ti3C2Tx and CeO2, the response of composite to 10 ppm of NH3 is enhanced by 180% and 714% at room temperature, respectively, in addition to the excellent selectivity, fast response, and recovery rate. Based on the first-principles calculation, the CeO2 nanoparticles form a multifunctional passivation layer to shield the MXene from oxidative degradation and also provide ample active sites to adsorb NH3 gas to enhance the sensing ability. The results reveal an effective means of designing and developing high-performance room-temperature ammonia sensors. © 2025 American Chemical Society

AB - 2D MXenes have garnered enormous interest in the field of gas sensing. Unfortunately, the low stability, long recovery time, poor selectivity, and vulnerability to oxidation have hampered further development. Herein, Ti3C2Tx MXene is incorporated with CeO2 nanoparticles to improve the detection of NH3. Compared with Ti3C2Tx and CeO2, the response of composite to 10 ppm of NH3 is enhanced by 180% and 714% at room temperature, respectively, in addition to the excellent selectivity, fast response, and recovery rate. Based on the first-principles calculation, the CeO2 nanoparticles form a multifunctional passivation layer to shield the MXene from oxidative degradation and also provide ample active sites to adsorb NH3 gas to enhance the sensing ability. The results reveal an effective means of designing and developing high-performance room-temperature ammonia sensors. © 2025 American Chemical Society

KW - CeO2

KW - Ti3C2Tx

KW - heterojunction

KW - room-temperaturegas sensor

KW - first-principles calculation

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001503741800001

UR - http://www.scopus.com/inward/record.url?scp=105007498881&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105007498881&origin=recordpage

U2 - 10.1021/acsanm.5c01721

DO - 10.1021/acsanm.5c01721

M3 - RGC 21 - Publication in refereed journal

SN - 2574-0970

VL - 8

SP - 12090

EP - 12099

JO - ACS Applied Nano Materials

JF - ACS Applied Nano Materials

IS - 23

ER -

Enhanced Room-Temperature NH₃-Sensing Performance of Ti₃C₂T_x MXene Decorated with CeO₂ Nanoparticles

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

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Enhanced Room-Temperature NH3-Sensing Performance of Ti3C2Tx MXene Decorated with CeO2 Nanoparticles

Abstract

Funding

Research Keywords

RGC Funding Information

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

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Enhanced Room-Temperature NH₃-Sensing Performance of Ti₃C₂T_x MXene Decorated with CeO₂ Nanoparticles