| Title: | Synthesis of Hollow Iron Oxide Nanospheres and Their Application to Gas Sensors |
| Author(s): | Oh KH; Park HJ; Kang SW; Park JC; Nam KM; |
| Address: | "Department of Chemistry, Mokpo National University, 1666 Yeongsan-ro, Cheonggye-myeon, Muan-gun, Jeonnam 58554, Republic of Korea. Bio-Medical IT Convergence Research Department, Electronic and Telecommunications Research Institute (ETRI), Daejeon 34129, Republic of Korea. Clean Fuel Laboratory, Korea Institute of Energy Research, 152 Gajeong-Ro, Daejeon 34129, Republic of Korea" |
| ISSN/ISBN: | 1533-4880 (Print) 1533-4880 (Linking) |
| Abstract: | "Hollow nanomaterials have attracted great interest because of their many applications in catalysis, nanoreactors, drug delivery systems, for lubrication and in gas sensors. Here, carbon sphere templates were prepared from glucose under hydrothermal conditions to facilitate the synthesis of hollow Fe2O3 nanospheres. Thermal decomposition of an iron precursor in benzylalcohol with the carbon spheres resulted in the deposition of Fe3O4 nanoparticles on the carbon sphere templates. The nanoparticles on the carbon surface naturally agglomerate and form a dense oxide shell during the calcination step, which produces typical Fe2O3 hollow structures. The gas sensing performance of the hollow Fe2O3 nanospheres was investigated at an operating temperature of 300 degrees C. The hollow Fe2O3 nanospheres showed high sensitivity (R = 10.766 at 1 ppm formaldehyde) with a linear response to formaldehyde gas concentration in the range of 0.8~2.4 ppm, and good selectivity to formaldehyde gas in volatile organic compounds, compared to commercial Fe2O3 nanoparticles" |
| Notes: | "PubMed-not-MEDLINEOh, Kyung Hee Park, Hyung Ju Kang, Shin Wook Park, Ji Chan Nam, Ki Min eng 2018/02/17 J Nanosci Nanotechnol. 2018 Feb 1; 18(2):1356-1360. doi: 10.1166/jnn.2018.14925" |
