Nanocomposites of pre-oxidized Ti3C2Tx MXene and SnO2 nanosheets for highly sensitive and stable formaldehyde gas sensor

Niu，Gaoqiang1; Zhang，Mingxiang1; Wu，Bo1; Zhuang，Yi1; Ramachandran，Rajendran1,2; Zhao，Changhui1; Wang，Fei1

2022

10.1016/j.ceramint.2022.09.238

CERAMICS INTERNATIONAL   Impact Factor & Quartile

0272-8842

1873-3956

In this work, nanocomposites of pre-oxidized TiCT MXene and SnO nanosheets are prepared by facile synthesis and annealing process for formaldehyde sensors. The TiCT MXene is pre-oxidized intentionally to avoid further degradation, which is verified with Raman, TEM and XPS. The morphology and structure of the SnO/MXene nanocomposites are characterized with XRD, SEM and TEM. The gas sensor based on the nanocomposites with 1 wt% TiCT MXene achieves high response, low limit of detection, good selectivity, excellent reproducibility and superior long-term stability. An optimal response of 38.6 is reached at 160 °C to 20 ppm formaldehyde and a limit of detection as low as 50 ppb is successfully achieved. The sensing properties are dependent on the amount of TiCT MXene, and a sensing mechanism has been proposed for the performance enhancement by the synergistic effect between the pre-oxidized TiCT MXene and the SnO nanosheets.

Formaldehyde sensing Oxygen vacancy Pre-oxidation SnO2 Ti3C2Tx MXene

SCI

English

First ; Corresponding

[2020YFB2008604] ; [K21799109] ; [K21799110]

Materials Science

Materials Science, Ceramics

WOS:000904087500001

ELSEVIER SCI LTD

MATERIALS SCIENCE

2-s2.0-85139186711

Scopus

1.School of Microelectronics,Southern University of Science and Technology,Shenzhen,518055,China
2.Academy of Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China

Niu，Gaoqiang,Zhang，Mingxiang,Wu，Bo,et al. Nanocomposites of pre-oxidized Ti3C2Tx MXene and SnO2 nanosheets for highly sensitive and stable formaldehyde gas sensor[J]. CERAMICS INTERNATIONAL,2022,49(2).

Niu，Gaoqiang.,Zhang，Mingxiang.,Wu，Bo.,Zhuang，Yi.,Ramachandran，Rajendran.,...&Wang，Fei.(2022).Nanocomposites of pre-oxidized Ti3C2Tx MXene and SnO2 nanosheets for highly sensitive and stable formaldehyde gas sensor.CERAMICS INTERNATIONAL,49(2).

Niu，Gaoqiang,et al."Nanocomposites of pre-oxidized Ti3C2Tx MXene and SnO2 nanosheets for highly sensitive and stable formaldehyde gas sensor".CERAMICS INTERNATIONAL 49.2(2022).