Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity,good selectivity,fast response/recovery,great stability/repeatability,room-working temperatu...Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity,good selectivity,fast response/recovery,great stability/repeatability,room-working temperature,low cost,and easy-to-fabricate,for versatile applications.This progress report reviews the advantages and advances of these sensing structures compared with the single constituent,according to five main sensing forms:manipulating/constructing heterojunctions,catalytic reaction,charge transfer,charge carrier transport,molecular binding/sieving,and their combinations.Promises and challenges of the advances of each form are presented and discussed.Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are discussed.展开更多
Gas sensors have received extensive attention because of the gas pollution caused by rapid construction of urbanization and industrialization.Gas sensors based on semiconductor metal oxide(SMO)have the advantages of h...Gas sensors have received extensive attention because of the gas pollution caused by rapid construction of urbanization and industrialization.Gas sensors based on semiconductor metal oxide(SMO)have the advantages of high response,excellent repeatability,stability,and cost-effectiveness,and have become extremely important components in the gas sensor field.Materials with regular structures and controllable morphology exhibit more consistent and repeatable performance.However,during the process of material synthesis,because of the uncontrollability of the microcosm,nanomaterials often show irregularities,unevenness,and other shortcomings.Thus,the synthesis of gas sensors with well-aligned one-dimensional(1D)structures,two-dimensional(2D)layered structures,and three-dimensional(3D)hierarchical structures has received extensive attention.To obtain regular structured nanomaterials with desired morphologies and dimensions,a template-assisted synthesis method with low cost and controllable process seems a very efficient strategy.In this review,we introduce the morphology and performance of SMO sensors with 1D,2D,and 3D structures,discuss the impact of a variety of morphologies on gas sensor performance(response and stability),and shed new light on the synthesis of gas sensing materials with stable structure and excellent performance.展开更多
基金the Phase-II Grand Challenges Explorations award from the Bill,Melinda Gates Foundation(Grant ID:OPP1109493)International Research Fellow of the Japan Society of the Promotion of Science(JSPS,Postdoctoral Fellowships for Research in Japan(Standard),P18334)+2 种基金the National Natural Science Foundation of China(21801243)the Natural Science Foundation of Shaanxi province(2018JM6045,2018JM1046)Research funding was received from Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration(SHUES2019A02).
文摘Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity,good selectivity,fast response/recovery,great stability/repeatability,room-working temperature,low cost,and easy-to-fabricate,for versatile applications.This progress report reviews the advantages and advances of these sensing structures compared with the single constituent,according to five main sensing forms:manipulating/constructing heterojunctions,catalytic reaction,charge transfer,charge carrier transport,molecular binding/sieving,and their combinations.Promises and challenges of the advances of each form are presented and discussed.Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are discussed.
基金Project supported by the National Natural Science Foundation of China(No.62001097)the Natural Science Foundation of Heilongjiang Province(No.LH2020F001)+3 种基金the Young Elite Scientists Sponsorship Program by China Association for Science and Technology(CAST)(No.YESS20210262)the China Postdoctoral Science FoundationFunded Project(No.2021M690571)the Heilongjiang Postdoctoral Fund,China(No.LBH-Z21096)the Fundamental Research Funds for the Central Universities,China(No.2572020BU04)。
文摘Gas sensors have received extensive attention because of the gas pollution caused by rapid construction of urbanization and industrialization.Gas sensors based on semiconductor metal oxide(SMO)have the advantages of high response,excellent repeatability,stability,and cost-effectiveness,and have become extremely important components in the gas sensor field.Materials with regular structures and controllable morphology exhibit more consistent and repeatable performance.However,during the process of material synthesis,because of the uncontrollability of the microcosm,nanomaterials often show irregularities,unevenness,and other shortcomings.Thus,the synthesis of gas sensors with well-aligned one-dimensional(1D)structures,two-dimensional(2D)layered structures,and three-dimensional(3D)hierarchical structures has received extensive attention.To obtain regular structured nanomaterials with desired morphologies and dimensions,a template-assisted synthesis method with low cost and controllable process seems a very efficient strategy.In this review,we introduce the morphology and performance of SMO sensors with 1D,2D,and 3D structures,discuss the impact of a variety of morphologies on gas sensor performance(response and stability),and shed new light on the synthesis of gas sensing materials with stable structure and excellent performance.
