Fluorine-mediated porosity and crystal-phase tailoring of meso-macroporous F TiO2 nanofibers and their enhanced photocatalytic performance
| Autor: | Jae Sung Yun, Jongsung Park, Cheolhyun Lim, Changheon Kim, Suk-Ho Lee, Hyuk-Ryeol Park, Dohyung Kim, Gunho Kim |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Anatase Materials science Scanning electron microscope Metals and Alloys 02 engineering and technology Surfaces and Interfaces 021001 nanoscience & nanotechnology Hydrogen fluoride 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Chemical engineering Transmission electron microscopy Phase (matter) Nanofiber 0103 physical sciences Materials Chemistry 0210 nano-technology Porosity Mesoporous material |
| Zdroj: | Thin Solid Films. 689:137523 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2019.137523 |
| Popis: | We present the synthesis of surface-fluorinated, rutile-rich, meso-macroporous TiO2 nanofibers via simple post-treatment in a 5% hydrogen fluoride solution at room temperature and atmospheric pressure. Using various characterization methods, we demonstrate that the anatase phase of the nanofiber can be used as a sacrificial template to ensure appropriate porosity characteristics in the TiO2 nanofibers. From scanning electron microscopy results, it was confirmed that the dimensions of the nanofibers do not change after the hydrogen fluoride post-treatment. However, x-ray diffraction and transmission electron microscopy results confirm that the proportion of the rutile phase increases after hydrogen fluoride post-treatment. After hydrogen fluoride treatment, small pores with diameter below 10 nm almost disappear, and the pore size distribution ranges from mesopore ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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