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论文类型：期刊论文

发表时间：2018-03-01

发表刊物：SENSORS AND ACTUATORS B-CHEMICAL

收录刊物：SCIE、EI、ESI高被引论文

卷号：256

页面范围：374-382

ISSN号：0925-4005

关键字：Acetone; Sensors; ZnO/ZnFe2O4 composites; Prussian Blue analogue

摘要：Semiconductor oxides with hierarchically hollow architecture can provide significant advantages as sensing materials for gas sensing by facilitating the diffusion of target gases and the surface reaction. A cost-efficient and facile strategy is developed to scalably fabricate triple-shelled hollow binary ZnO/ZnFe2O4 (ZZFO) metal oxides microspheres with excellent intimate heterojunctions through a morphology-inherited annealing treatment of single-resource Prussian Blue analogue of Zn-3[Fe(CN)(6)](2)center dot xH(2)O solid microspheres as self-sacrificial templates. The porous hybrid ZZFO triple-shelled hollow microspheres (TSHMSs) are demonstrated to be composed of crystalline ZnO and ZnFe2O4 nano-domains with well homogeneous dispersion at the nanoscale and large void spaces between adjacent shells. When evaluated as sensors towards acetone vapor, benefiting from the striking synergy and interplay between active bicomponents and the intrinsic structural advantages, the as-fabricated ZZFO TSHMSs sensor exhibited high performances, including excellent sensitivity, good selectivity and high reversibility, rapid response ability at ultralow working temperature (140 degrees C). Of great significance, these prominent findings may pave the way towards optimizational design and efficient fabrication of mixed metal oxides derived from other PBAs or even other MOFs as high-performance gas sensors in the future. (C) 2017 Elsevier B.V. All rights reserved.