化学电阻器
异质结
材料科学
纳米技术
丙酮
介孔材料
化学工程
光电子学
化学
催化作用
有机化学
工程类
生物化学
作者
Chengjun Dong,Ruonan Tian,Yanlin Zhang,Kaili Liu,Gang Chen,Hongtao Guan,Zongyou Yin
标识
DOI:10.1016/j.cej.2022.136094
摘要
Rational integration of multifunctions is an emerging strategy to develop novel chemiresistor nano platforms with superior sensing properties. Herein, a stepwise synthesis strategy is developed to assemble two MOFs with huge mismatch into MOF-on-MOF heterojunction, which was nanoarchitectured into Fe2O3@ZnFe2O4 radial-heterospindles. The Fe2O3@ZnFe2O4 heterospindles exhibited outstanding selective acetone detection with multifaceted superiorities, such as high response, low limit of detection, fast response and recovery time, and good linearity in responses with a wide concentration window. An in-depth discussion revealed that such multifaceted sensing characters can be attributed to the distinct radial-heterostructure which proffer synergetic effects in the unimpeded gas diffusion with mesoporous sensing nanoarchitecture, favored interfacial charge transport in radial heterojunction, abundant active adsorption/reaction sites by rich oxygen vacancies, and exponential/efficient tuning of sensor resistance with barrier height. This synthetic strategy here may offer a new opportunity for fabricating dual-to-multi MOFs-based advanced nanostructures towards practical chemiresistor nanoplatforms with favorable multifaceted superiorities.
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