首页|Ti3C2Tx/SnO2 P-N heterostructure construction boosts room-temperature detecting formaldehyde

Ti3C2Tx/SnO2 P-N heterostructure construction boosts room-temperature detecting formaldehyde

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Formaldehyde is a common atmospheric pol-lutant produced in industrial production and daily life.However,the traditional semiconductor formaldehyde gas sensor cannot work at room temperature,which limits its practical application.Therefore,developing high-perfor-mance gas sensors for rapidly and accurately detecting formaldehyde at room temperature is an important topic.In this study,Ti3C2Tx/SnO2 heterostructures were con-structed,which could selectively detect formaldehyde at room temperature with a response value of 29.16％(10 × 10-6).In addition,the sensor shows a remarkable theoretical detection limit of 5.09 × 10-9 and good long-term stability.Density functional theory(DFT)simulations reveal that SnO2 nanospheres provide the majority of adsorption sites that strongly interact with formaldehyde.Meanwhile,Ti3C2Tx acting as a conductive layer facilitates the transfer of charge carriers so that they show a sensing response to formaldehyde at room temperature.Moreover,the formation of p-n heterostructures between SnO2 and Ti3C2Tx boosts the Schottky barrier at the interface,which is the critical factor in enhancing the sensing properties by turning the Schottky barrier upon introducing formalde-hyde gas.This perspective is expected to provide instruc-tive guidance for utilizing MXene/metal oxide nanocomposites to improve the gas sensing performance at room temperature.

Ti3C2Tx/SnO2 nanocompositesp-n heterostructuresFormaldehyde sensingRoom temperatureDFT calculations

Yue Zhang、Ming-Yue Wang、Xiao-Guang San、Yan-Bai Shen、Guo-Sheng Wang、Lei Zhang、Dan Meng

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College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China

Institute for Superconducting and Electronic Materials(ISEM),Australian Institute for Innovative Materials(AIIM),University of Wollongong,Wollongong,NSW 2500,Australia

College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China

National Natural Science Foundation of ChinaInnovative Talents in Colleges and Universities in Liaoning ProvinceLiao Ning Revitalization Talents ProgramLiaoning Educational Department FoundationNatural Science Foundation of Liaoning ProvinceYoung and Middleaged Scientific and Technological Innovation Talents of Shenyang Science and Technology Bureau

619732232020389XLYC2007051LJKMZ202207622021-MS-257RC200352

2024

10.1007/s12598-023-02456-0

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(1)
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