A two-dimensional Ti3C2TX MXene@TiO2/MoS2 heterostructure with excellent selectivity for the room temperature detection of ammonia

Tian, Xu; Yao, Lifang; Cui, Xiuxiu; Zhao, Rongjun; Chen, Ting; Xiao, Xuechun; Wang, Yude

doi:10.1039/d1ta10773a

Cited by 118 publications

(44 citation statements)

References 72 publications

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“…By contrast, the Mo 2 TiC 2 T x /MoS 2 composite‐based sensor shows obvious advantages in detecting NO 2 gas. [ 33 ]…”

Section: Resultsmentioning

confidence: 99%

“…By contrast, the Mo 2 TiC 2 T x /MoS 2 composite-based sensor shows obvious advantages in detecting NO 2 gas. [33] The experimental test and theoretical calculation of selectivity are shown in The responses of the pristine MoS 2 sensor to NO 2 , NH 3 , and H 2 S are 19.25%, 12.40%, and 9.5%, respectively, suggesting that the MoS 2 has a poor selectivity toward NO 2 gas. In contrast, the Mo 2 TiC 2 T x /MoS 2 composite gas sensor shows a high response (415.8%) for NO 2 in eight gases.…”

Section: Gas Sensing Performancesmentioning

confidence: 99%

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Edge‐Enriched Mo₂TiC₂T_x/MoS₂ Heterostructure with Coupling Interface for Selective NO₂ Monitoring

Zhao

Zhou

Zhang

et al. 2022

Adv Funct Materials

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Endowed with rich terminal groups, good electrical conductivity, and controllable structure, transition metal carbides/nitrides (MXenes) have attracted extensive attention for potential application in gas sensor, but long-standing challenges of the MXenes (titanium carbide as the representative) are their limited selectivity and sensitivity. Herein, a high-active double transition-metal titanium molybdenum carbide (Mo 2 TiC 2 T x ) with superstrong surface adsorption (−3.12 eV) for NO 2 gas molecule is proposed, and it is further coupled with molybdenum disulfide (MoS 2 ) by interface modulation to construct an edgeenriched heterostructure. Due to the synergistic effect of strong adsorption, rich adsorption sites, and coupling interface of Mo 2 TiC 2 T x /MoS 2 composite, the as-fabricated Mo 2 TiC 2 T x /MoS 2 gas sensor exhibits an outstanding response toward NO 2 with high selectivity against various interference gases, which is well supported by density functional theory calculations. Meanwhile, the sensor exhibits a sensitivity of 7.36% ppm −1 , detection limit of 2.5 ppb, and reversibility at room temperature. A portable, wireless NO 2 monitoring system is demonstrated for gas leakage searching and dangerous warning based on Mo 2 TiC 2 T x /MoS 2 gas sensor. This work facilitates the gas sensing application of MXenes, and provides an avenue for the development of wireless sensing system in environmental monitoring and safety assurance.

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“…By contrast, the Mo 2 TiC 2 T x /MoS 2 composite‐based sensor shows obvious advantages in detecting NO 2 gas. [ 33 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Gas Sensing Performancesmentioning

confidence: 99%

Edge‐Enriched Mo₂TiC₂T_x/MoS₂ Heterostructure with Coupling Interface for Selective NO₂ Monitoring

Zhao

Zhou

Zhang

et al. 2022

Adv Funct Materials

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“…The peak current is highest for 6ReS 2 -Nb 2 CT x x modified CC, which indicates the highest electron transfer kinetics compared to other composites, Nb 2 CT x , and ReS 2 . The electrochemical activity of the composite is higher than Nb 2 CT x and ReS 2 , which can be attributed to the heterojunction formed at the interface of p-type MXene and n-type ReS 2 [40]. In addition, the electrochemical activity of the modified electrodes has been tested in BR buffer solution and it shows the highest electrochemical activity for 6ReS 2 -Nb 2 CT x modified CC Fig.…”

Section: Electrochemical Analysismentioning

confidence: 97%

A novel ReS2–Nb2CTx composite as a sensing platform for ultrasensitive and selective electrochemical detection of dipyramidole from human serum

Ankitha

Shabana

Rasheed

2022

Graphene and 2D mater

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The electrochemical detection of dipyridamole (DIPY) is highly essential since it is extensively used for the treatment of cardiovascular diseases and to impart inhibitory effects for cancer patients. In this work, we report the development of a novel composite of MXene and ReS 2 (ReS 2 –Nb 2 CT x ) by hydrothermal method. It was found that Nb 2 CT x was partially oxidized and ReS 2 nanoparticles were distributed on the surface of Nb 2 CT x during the hydrothermal synthesis. The ReS 2 –Nb 2 CT x was used to modify carbon cloth electrodes and used for the electrochemical detection of DIPY. The ratio of ReS 2 was optimized in the composite by varying the atomic ratio from 4 to 9 and it was found that 6ReS 2 –Nb 2 CT x showed the best sensing characteristics owing to the optimum interaction between ReS 2 and Nb 2 CT x . The developed sensor was able to detect DIPY linearly in the range 100 pM–1 μM and achieved a limit of detection of (LOD) of 28 pM. The modified electrode exhibited excellent selectivity towards DIPY in the presence of other interferents in addition to its good storage stability and repeatability. Furthermore, the developed sensor was also used for the detection of DIPY in human serum samples. Thus, this work paves the way to develop MXene-based platform for fabrication of flexible device capable of monitoring the acute levels of DIPY. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s41127-022-00055-x.

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“…Once exposed to reducing gases, the resistance of sensing materials increases, which is what one expects from a p-type semiconductor. 18,27,[42][43][44] During exposure, electrons will be generated, and accordingly, the concentration of the free charge carriers, the holes, will decrease.…”

Section: Gas Sensing Mechanismmentioning

confidence: 99%

MoO₃/TiO₂/Ti₃C₂T_x nanocomposite based gas sensors for highly sensitive and selective isopropanol detection at room temperature

et al. 2022

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A two-dimensional Ti₃C₂T_X MXene@TiO₂/MoS₂ heterostructure with excellent selectivity for the room temperature detection of ammonia

Abstract: Two-dimensional nanomaterials have exhibited a considerable potential for gas sensing application in recent years owing to their unique physical and chemical properties such as large surface-to-volume ratio, abundant edge sites,...

Cited by 118 publications

References 72 publications

Edge‐Enriched Mo₂TiC₂T_x/MoS₂ Heterostructure with Coupling Interface for Selective NO₂ Monitoring

Edge‐Enriched Mo₂TiC₂T_x/MoS₂ Heterostructure with Coupling Interface for Selective NO₂ Monitoring

A novel ReS2–Nb2CTx composite as a sensing platform for ultrasensitive and selective electrochemical detection of dipyramidole from human serum

MoO₃/TiO₂/Ti₃C₂T_x nanocomposite based gas sensors for highly sensitive and selective isopropanol detection at room temperature

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A two-dimensional Ti3C2TX MXene@TiO2/MoS2 heterostructure with excellent selectivity for the room temperature detection of ammonia

Abstract: Two-dimensional nanomaterials have exhibited a considerable potential for gas sensing application in recent years owing to their unique physical and chemical properties such as large surface-to-volume ratio, abundant edge sites,...

Cited by 118 publications

References 72 publications

Edge‐Enriched Mo2TiC2Tx/MoS2 Heterostructure with Coupling Interface for Selective NO2 Monitoring

Edge‐Enriched Mo2TiC2Tx/MoS2 Heterostructure with Coupling Interface for Selective NO2 Monitoring

A novel ReS2–Nb2CTx composite as a sensing platform for ultrasensitive and selective electrochemical detection of dipyramidole from human serum

MoO3/TiO2/Ti3C2Tx nanocomposite based gas sensors for highly sensitive and selective isopropanol detection at room temperature

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A two-dimensional Ti₃C₂T_X MXene@TiO₂/MoS₂ heterostructure with excellent selectivity for the room temperature detection of ammonia

Edge‐Enriched Mo₂TiC₂T_x/MoS₂ Heterostructure with Coupling Interface for Selective NO₂ Monitoring

Edge‐Enriched Mo₂TiC₂T_x/MoS₂ Heterostructure with Coupling Interface for Selective NO₂ Monitoring

MoO₃/TiO₂/Ti₃C₂T_x nanocomposite based gas sensors for highly sensitive and selective isopropanol detection at room temperature