Interfacial energy barrier tuning of hierarchical Bi_(2)O_(3)/WO_(3) heterojunctions for advanced triethylamine sensor  

作　　者：Mingxin ZHANG Kai LIU Xingmin ZHANG Bingbing WANG Xinru XU Xinxin DU Chao YANG Kewei ZHANG 

机构地区：[1]College of Materials Science and Engineering,State Key Laboratory of Bio-Fibers and Eco-Textiles,Collaborative Innovation Center for Marine Biomass Fibers,Materials and Textiles of Shandong Province,Qingdao University,Qingdao 266071,China

出　　处：《Journal of Advanced Ceramics》2022年第12期1860-1872,共13页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China(No.51973099);Taishan Scholar Program of Shandong Province(No.tsqn201812055);Qingdao Science and Technology Plan Key Research and Development Special Project(No.21-1-2-17-xx);State Key Laboratory of Bio-Fibers and Eco-Textiles(Qingdao University)(Nos.ZKT04 and GZRC202007).

摘　　要：Traditional triethylamine(TEA)sensors suffer from the drawback of serious cross-sensitivity due to the low charge-transfer ability of gas-sensing materials.Herein,an advanced anti-interference TEA sensor is designed by utilizing interfacial energy barriers of hierarchical Bi_(2)O_(3)/WO_(3) composite.Benefiting from abundant slit-like pores,desirable defect features,and amplification effect of heterojunctions,the sensor based on Bi_(2)O_(3)/WO_(3) composite with 40%Bi_(2)O_(3)(0.4-Bi_(2)O_(3)/WO_(3))demonstrates remarkable performance in terms of faster response/recovery time(1.7-fold/1.2-fold),higher response(2.1-fold),and lower power consumption(30℃-decrement)as compared with the pristine WO_(3) sensor.Furthermore,the composite sensor exhibits long-term stability,reproducibility,and negligible response towards interfering molecules,indicating the promising potential of Bi_(2)O_(3)/WO_(3) heterojunctions in anti-interference detection of low-concentration TEA in real applications.This work not only offers a rational solution to design advanced gas sensors by tuning the interfacial energy barriers of heterojunctions,but also provides a fundamental understanding of hierarchical Bi_(2)O_(3) structures in the gas-sensing field.

关 键 词：Bi_(2)O_(3)/WO_(3) HETEROJUNCTIONS hierarchical structures triethylamine(TEA) gas sensors 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] O645.4[自动化与计算机技术—控制科学与工程]