Quantum dot sensitized electrospun mesoporous titanium dioxide hollow nanofibers for photocatalytic applications

Abstract

TiO2 hollow nanofibers prepared by coaxial electrospinning were sensitized with CdS QDs by SILAR method and their photocatalytic dye degradation performance was investigated.

Recent Advances in the Synthesis of Metal Oxide Nanofibers and Their Environmental Remediation Applications

“…For example, poly(vinylpyrrolidone) (PVP) and tetra butyltitanate (Ti (OC 4 H 9 ) 4 ) were electrospun as shell solutions and paraffin oil or mineral oil was poured in as the core material. TiO 2 fibers with a hollow core structure were achieved when the polymer and core materials were removed by selective etching [18]. Figure 4 shows the morphologies of hollow titanium dioxide nanofibers fabricated using the core-shell electrospinning technique, as reported by Sing et al [18].…”

“…TiO2 fibers with a hollow core structure were achieved when the polymer and core materials were removed by selective etching [18]. Figure 4 shows the morphologies of hollow titanium dioxide nanofibers fabricated using the core-shell electrospinning technique, as reported by Sing et al [18]. In the second CVD method, the first precursor polymer is converted to a nanofiber or a "template" using electrospinning.…”

Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2

“…Therefore, much effort has been expended to reduce the recombination rate of TiO 2 and to enhance its photocatalytic efficiency under both UV and visible light irradiation. Several approaches have been undertaken, including doping with non-metals such N, C and S [33][34][35][36], transition metals (TM) including Fe, Co, Cr, Cu, Mo and Ta [37][38][39][40][41][42][43] or rare earth metals such as Ce, La, Eu and Ga [44][45][46][47][48][49], inducing structural defects such as Ti 3+ or oxygen vacancies [50][51][52], and coupling TiO 2 with noble metals [14,53,54], narrow bandgap semiconductors [55,56], hydroxyapatite [57] or graphene [54] giving rise to TiO 2 -based hybrid structures with improved properties. Among the different approaches, the incorporation of dopants in low concentrations into the TiO 2 lattice have been shown to be a simple an effective way to reduce the electron-hole recombination rate and enhance absorption in the visible region of the electromagnetic spectrum.…”

Nanofibers for Biomedical and Healthcare Applications

“…Functional compounds such as poly(quaternary ammonium) can be used to target pathogenic microorganisms such as nanobiocides that can be entrapped in the nanofibers . Singh et al . fabricated CdS nanoparticles integrated mesoporous hollow TiO 2 nanofibers by a coaxial electrospinning technique for the photocatalytic degradation of para‐nitrophenol (4‐NP), a well‐known model water pollutant dye.…”