| Title: | Volatile Organic Compound Gas-Sensing Properties of Bimodal Porous alpha-Fe(2)O(3) with Ultrahigh Sensitivity and Fast Response |
| Author(s): | Geng W; Ge S; He X; Zhang S; Gu J; Lai X; Wang H; Zhang Q; |
| Address: | "MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Science , Northwestern Polytechnical University , Xi'an 710072 , People's Republic of China. Key Laboratory of Energy Resource and Chemical Engineering, State Key Laboratory Cultivation Base of Natural Gas Conversion, School of Chemistry and Chemical Engineering , Ningxia University , Yinchuan 750021 , People's Republic of China. Department of Materials Science and Engineering, Key Laboratory of Materials Corrosion and Protection Sichuan Province , Sichuan University of Science and Engineering , Zigong 643000 , People's Republic of China" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Linking) |
| Abstract: | "Porous solid with multimodal pore size distribution provides plenty of advantages including large specific surface area and superior mass transportation to achieve high gas-sensing performances. In this study, alpha-Fe(2)O(3) nanoparticles with bimodal porous structures were prepared successfully through a nanocasting pathway, adopting the bicontinuous 3D cubic symmetry mesoporous silica KIT-6 as the hard template. Its structure and morphology were characterized by X-ray diffraction, nitrogen adsorption-desorption, transmission electron microscopy, and so on. Furthermore, the gas sensor fabricated from this material exhibited excellent gas-sensing performance to several volatile organic compounds (acetone, ethyl acetate, isopropyl alcohol, n-butanol, ethanol, and methanol), such as ultrahigh sensitivity, rapid response speed (less than 10 s) and recovery time, good reproducibility, as well as stability. These would be associated with the desirable pore structure of the material, facilitating the molecules diffusion toward the entire sensing surface, and providing more active sensing sites for analytical gas" |
| Keywords: | Voc bimodal pore size gas sensor mass transportation nanocasting alpha-Fe2O3; |
| Notes: | "PubMed-not-MEDLINEGeng, Wangchang Ge, Shaobing He, Xiaowei Zhang, Shan Gu, Junwei Lai, Xiaoyong Wang, Hong Zhang, Qiuyu eng 2018/04/06 ACS Appl Mater Interfaces. 2018 Apr 25; 10(16):13702-13711. doi: 10.1021/acsami.8b02435. Epub 2018 Apr 10" |
