Metal-Oxide Nanomaterials Synthesis and Applications in Flexible and Wearable Sensors. Yeosang Yoon, Phuoc Loc Truong, Daeho Lee, Seung Hwan Ko.ACS Sustainable Chemistry & Engineering 2022, 10 Interface Growth of PANI-ZnO Nanohybrids on a Self-Formed Grapefruit Peel Aerogel to Construct a Quick Self-Restored Gas Sensor. Chuang Wang, Hou-Yong Yu, Zhouyu Miao, Dan Ge, Somia Yassin Hussain Abdalkarim, Juming Yao.Hollow –Pt Core–Shell Nanofibers for Ethanol Sensing. Xiaoyan Song, Fangzheng Zhao, Zhipeng Wang, Runbin Ge, Jinfeng Xing.ACS Applied Nano Materials 2022, Article ASAP. A Sensitive Acetone Sensor Based on WS2/WO3 Nanosheets with p-n Heterojunctions. Xiaoxue Liu, Junzhuo Xu, Ziyu Cheng, Jiao Yang, Yingchun Li.Co3O4 Nanosheets Decorated with In2O3 Nanocubes with Exposed Facets for ppb-Level CO Sensing. Bingcai Chen, Pengpeng Li, Lian Sun, Yingde Wang, Bing Wang.This article is cited by 99 publications. This work provides an efficient route for the preparation of novel hierarchical sensitive materials. The excellent sensing properties of the In 2O 2 were attributed to the synergistic effect of large specific surface areas of SnO 2 nanosheet arrays, abundant adsorbed oxygen species on the surface, unique electron transformation between core–shell heterogeneous materials, and long electronic transmission channel of SnO 2 transition layer. More importantly, the detection limit toward HCHO gas was as low as 10 ppb ( R a/ R g = 1.9), which could be used for trace HCHO gas detection.
In addition, the gas sensor showed instantaneous response/recovery time (3/3.6 s) toward 100 ppm of HCHO at the optimal operation temperature of 120 ☌. Specifically, the response value ( R a/ R g) of the In 2O 2 nanocomposite reached 180.1 toward 100 ppm of HCHO gas, which was near 9 and 6 times higher than that of the pure In 2O 3 nanofibers ( R a/ R g = 19.7) and pure SnO 2 nanosheets ( R a/ R g = 33.2), respectively. The formaldehyde (HCHO) sensing performances of pure In 2O 3 nanofibers, SnO 2 nanosheets, and In 2O 2 core–shell nanocomposite were compared, and the In 2O 2 nanocomposite possessed highest response value, fast response/recovery speed, best selectivity, and lowest HCHO detection limit. Besides, hierarchical core–shell nanostructure of In 2O 2 was characterized by elemental maps using scanning transmission electron microscopy. Vertically aligned SnO 2 nanosheets uniformly grown on the outside surface of In 2O 3 nanofibers were clearly observed by field emission scanning electron microscopy. In this work, three-dimensional (3D) hierarchical In 2O 2 core–shell nanofiber (In 2O 2) was designed and successfully prepared via a facile electrospinning and further hydrothermal methods.
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