| Title: | Controllable construction of ZnFe(2)O(4)-based micro-nano heterostructure for the rapid detection and degradation of VOCs |
| Author(s): | Li B; Zhang X; Huo L; Gao S; Guo C; Zhang Y; Major Z; Zhang F; Cheng X; Xu Y; |
| Address: | "Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China. Institute of Polymer Product Engineering, Johannes Kepler University Linz, Austria. College of Science, China University of Petroleum (East China), Qingdao 266580, China. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China. Electronic address: chengxiaoli@hlju.edu.cn. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China. Electronic address: xuyingming@hlju.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2022.129005 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Micro-nano heterogeneous oxides have received extensive attention due to their distinctive physicochemical properties. However, it is a challenge to prepare the hierarchical multicomponent metal oxide nanomaterials with abundant heterogeneous interfaces in a controllable way. In this work, the effective construction of the heterogeneous structure of the material is achieved by regulating the ratio of metal salts under thermal solvent condition. Three-dimensional spheres (ZnFe(2)O(4)) constructed by zero-dimensional ultra-small nanoparticles, in particular three-dimensional hollow sea urchin spheres (ZnO/ZnFe(2)O(4)) constructed by one-dimensional nanorods and three-dimensional hydrangeas (alpha-Fe(2)O(3)/ZnFe(2)O(4)) assembled by two-dimensional nanosheets were obtained. The two composite materials contain a large number of heterojunctions, which enhances the sensitivity of material to volatile organic compounds gas. Among them, the alpha-Fe(2)O(3)/ZnFe(2)O(4) composite shows the best sensing performance for VOCs. For example, its response to 100 ppm acetone reaches 142 at 170 degrees C with the response time shortened to 3 s and the detection limit falling to 10 ppb. Meanwhile, the composite material presents a degradation rate of more than 90% for VOCs at a flow rate of 20 mL/min at 170 degrees C. In addition, the sensing and sensitivity mechanism of the composite material are studied in detail by combining GC-MS, XPS with UV diffuse reflectance tests" |
| Keywords: | Gas detection and degradation Low detection limit Micro-nano heterogeneous oxides VOCs alpha-Fe(2)O(3)/ZnFe(2)O(4) hierarchical structure; |
| Notes: | "PubMed-not-MEDLINELi, Baosheng Zhang, Xianfa Huo, Lihua Gao, Shan Guo, Chuanyu Zhang, Yu Major, Zoltan Zhang, Fangdou Cheng, Xiaoli Xu, Yingming eng Netherlands 2022/05/03 J Hazard Mater. 2022 Aug 5; 435:129005. doi: 10.1016/j.jhazmat.2022.129005. Epub 2022 Apr 25" |
