Journal
NANOMATERIALS
Volume 13, Issue 19, Pages -Publisher
MDPI
DOI: 10.3390/nano13192731
Keywords
fluoride doping; mesoporous tin dioxide; high conductivity; opto-electrical properties
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We have successfully synthesized fluordoped crystalline mesoporous tin dioxide powder at ambient pressure and temperature. This material exhibits high surface area, narrow pore size distribution, small average crystallite sizes, and good opto-electrical properties. The addition of fluorine increases the opto-electronic activity of tin dioxide by 20 times and conductivity by 100 times compared to pristine tin dioxide.
We report the successful one pot synthesis of crystalline mesoporous tin dioxide powder doped with fluoride at ambient pressure and temperature. This material possesses a high surface area, narrow pore size distribution, small average crystallite sizes, and good opto-electrical properties. The existence of fluorine increased the opto-electronic activity of tin dioxide by 20 times, and conductivity by 100 times compared with pristine tin dioxide prepared via the same method. The conductivity of SnO2 in air at 25 degrees C is 5 x 10-5 S/m, whereas that of F-SnO2 is 4.8 x 10-3 S/m. The structures of these materials were characterized with powder X-ray diffraction, N2 sorption analysis, transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and UV-visible spectroscopy. Fluorine occupies the framework of tin dioxide by replacing some of the oxygen atoms. The structure, conductance, and optical properties of these materials are discussed in this paper.
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