| Title: | Porous Ga-In Bimetallic Oxide Nanofibers with Controllable Structures for Ultrasensitive and Selective Detection of Formaldehyde |
| Author(s): | Chen H; Hu J; Li GD; Gao Q; Wei C; Zou X; |
| Address: | "Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University , Changchun 130025, P. R. China. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130012, P. R. China" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Linking) |
| Abstract: | "The design of appropriate composite materials with unique surface structures is an important strategy to achieve ideal chemical gas sensing. In this paper, efficient and selective detection of formaldehyde vapor has been realized by a gas sensor based on porous Ga(x)In(2-x)O(3) nanofibers assembled by small building blocks. By tuning the Ga/In atomic ratios in the materials, crystallite phase, nanostructure, and band gap of as-obtained Ga(x)In(2-x)O(3) nanofibers can be rationally altered. This further offers a good opportunity to optimize the gas sensing performances. In particular, the sensor based on porous Ga(0.6)In(1.4)O(3) nanofibers assembled by small nanoparticles ( approximately 4.6 nm) exhibits best sensing performances. Toward 100 ppm formaldehyde, its highest response (R(a)/R(g) = 52.4, at 150 degrees C) is approximately 4 times higher than that of the pure In(2)O(3) (R(a)/R(g) = 13.0, at 200 degrees C). Meanwhile, it has superior ability to selectively detect formaldehyde against other interfering volatile organic compound gases. The significantly improved sensing performance makes the Ga(0.6)In(1.4)O(3) sensor very promising for selective detection of formaldehyde" |
| Keywords: | Ga2O3 In2O3 formaldehyde gas sensor porous nanofibers; |
| Notes: | "PubMed-not-MEDLINEChen, Hui Hu, Jiabo Li, Guo-Dong Gao, Qian Wei, Cundi Zou, Xiaoxin eng 2017/01/14 ACS Appl Mater Interfaces. 2017 Feb 8; 9(5):4692-4700. doi: 10.1021/acsami.6b13520. Epub 2017 Jan 30" |
