Emerging horizons in chemiresistive gas sensing:when polyoxometalates meet mesoporous metal oxides
Creating gas sensors that are highly selective and function at low temperatures based on semicon-ductor metal oxides(SMOs)is considered a difficult endeavor,and these sensors are extensively applied in medical diagnosis,industrial manufacturing,and in spacecraft within the aerospace sector.This review ar-ticle delves into the emerging horizons of chemiresistive gas sensing,particularly focusing on the synergy between polyoxometalates(POMs)and block copolymers in self-assembly for the construction of ordered mesoporous metal oxides(MMOs).It highlights the advancements in gas sensing technology,emphasi-zing the role of POMs as precursors for MMOs,which offer high sensitivity and selectivity due to their u-nique physicochemical properties.The review covers various synthetic strategies and their impact on sen-sor performance,including low-temperature operation,high sensitivity,and selectivity towards specific gases.It also underscores the importance of nanostructure control,heteroatom doping,and the integration of noble metal catalysts in enhancing sensor capabilities.The article concludes with future research direc-tions,suggesting the exploration of a broader range of detectable compounds and the integration of these materials into practical devices for real-world applications.
chemiresistive gas sensorssemiconductor metal oxidesPOMsMMOs
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