Fluorine-mediated porosity and crystal-phase tailoring of meso-macroporous F TiO2 nanofibers and their enhanced photocatalytic performance
作者： Changheon Kim , Jongsung Park , Gunho Kim , Sukho Lee , Dohyung Kim
DOI: 10.1016/J.TSF.2019.137523
关键词: Chemical engineering 、 Transmission electron microscopy 、 Scanning electron microscope 、 Porosity 、 Mesoporous material 、 Phase (matter) 、 Anatase 、 Hydrogen fluoride 、 Nanofiber 、 Materials science
摘要: Abstract 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 anatase phase nanofiber can be used as sacrificial template to ensure appropriate porosity characteristics nanofibers. From scanning electron microscopy results, it was confirmed dimensions do not change after post-treatment. However, x-ray diffraction transmission results confirm proportion rutile increases After treatment, small pores with diameter below 10 nm almost disappear, pore size distribution ranges from mesopore (
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