Investigation of TiO2/SnS2 Heterojunction Composite Nanofibers for Room Temperature NO2 Gas Sensor
YANG Yan
WANG Yan
Abstract：In order to fully utilize the air permeability and high specific surface area of the nanofiber material,as well as the efficient interfacial electron transfer characteristics of the heterojunctions,so as to achieve effective detection of NO2 at room temperature,a composite nanofiber material composed of SnS2 nanosheets anchored by TiO2 nanofibers was innovatively prepared by electrospinning technology and hydrothermal method.The material was characterized by means of X-ray diffractometer,scanning electron microscopy,transmission electron microscopy,Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,and its gas sensing properties were investigated in detail.The results showed that the TiO2/SnS2 gas sensor exhibited a high response value of 79.1%to 10 mL/m3 NO2 gas at room temperature,with the response/recovery time being 120s/350s.In addition,the sensor exhibited excellent selectivity,highlighting its potential application in NO2 gas detection.This study provided an innovative strategy for the development of composite nanofiber materials with anchored heterojunctions,which could overcome the inherent limitations of traditional thin-film gas sensors and opened up a new path for the design of electronic devices for applications in complex and harsh environments.
Keywords：nanofibersSnS2heterojunctionroom temperaturegas sensorhigh responsefast response/recovery
Publication Date：2025-03-19
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 18-24,40 )