Abstract
A new electrospinning process was developed for preparing TiO2 nanofibers using a water-soluble Ti-precursor, [bis(kappa1O-hydroxo)(bis(kappa2O,O′-lactato)titanium(IV)] commonly known as titanium(IV) bis (ammonium lactato) dihydroxide (TiBALDH). The importance of the study is justified by the fact that Ti-precursors used for electrospinning, sol–gel, hydrothermal and other fiber synthesis processes are mostly non-water soluble. Accordingly, anatase TiO2 nanofibers of diameter between 20 and 140 nm were synthesized by electrospinning and annealing. Polyvinylpyrrolidone (PVP) and different concentrations of TiBALDH were dissolved in a mixture of water, ethyl alcohol and acetic acid to optimize the electrospinning conditions. The thermal decomposition and fragmentation of PVP, TiBALDH and the fibers with 50% mass fraction of TiBALDH were studied by TGA-MS measurements. The fibers were then annealed at 1 °C min−1 until 600 °C. The TiO2 fibers were characterized using SEM–EDX, FTIR and XRD
Highlights
Titanium dioxide is used in a number of applications including self-cleaning, antimicrobial thin film coatings, photocatalysis, gas sensing and dye-sensitized solar cells [1,2,3,4,5]
Anatase TiO2 nanofibers of diameter between 20–170 nm were synthesized by electrospinning using a water-soluble Ti-precursor
Polyvinylpyrrolidone and different concentrations of TiBALDH were dissolved in a mixture of water, ethyl alcohol and acetic acid followed by electrospinning at 20 kV to obtain nanofibers
Summary
Titanium dioxide is used in a number of applications including self-cleaning, antimicrobial thin film coatings, photocatalysis, gas sensing and dye-sensitized solar cells [1,2,3,4,5]. Keywords TiBALDH Á PVP Á Electrospinning Á Annealing Á TiO2 Á TGA-MS Á SEM–EDX Á FTIR and XRD No studies have been reported about the use of TiBALDH as a precursor in the synthesis of TiO2 nanofibers by electrospinning.
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