Stabilization of the anatase phase of Ti1−xSnxO2 (x < 0.5) nanofibers

Abstract

We experimentally investigate the stabilization of the anatase phase of Ti 1-x Sn x O 2 (x < 0.5) nanofibers when synthesized by an electrospinning method. The as-spun nanofibers became nano-grained, polycrystalline nanofibers after calcination and the diameters of the nanofibers depend on Sn content. Stabilization of the anatase phase in Ti-rich compositions and incorporation of Sn ions were confirmed by X-ray diffraction, Raman, X-ray absorption near-edge structure, and photoluminescence (PL) spectroscopies. Results from the PL study also demonstrated the tunable nature of the optical properties, with the emission maximum shifting towards higher wavelength with increasing Sn concentration.

Zr4+ Doping in Li4Ti5O12 Anode for Lithium‐Ion Batteries: Open Li+ Diffusion Paths through Structural Imperfection

“…[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] In contrast to most previous studies, in which benefits were claimed for the doping effect on the basis of enhanced electronic conductivity, [12,15,22] we have addressed the structural change due to Zr 4 + doping at different doping levels through a theoretical study using first principles calculations, as well as an experimental investigation, and correlated the two in order to understand the structural configuration of 1 D Zr-doped LTO nanostructures and the resultant electrochemical performance. [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] In contrast to most previous studies, in which benefits were claimed for the doping effect on the basis of enhanced electronic conductivity, [12,15,22] we have addressed the structural change due to Zr 4 + doping at different doping levels through a theoretical study using first principles calculations, as well as an experimental investigation, and correlated the two in order to understand the structural configuration of 1 D Zr-doped LTO nanostructures and the resultant electrochemical performance.…”

Vertically aligned tungsten oxide nanorod film with enhanced performance in photoluminescence humidity sensing

“…Therefore, the oxygen vacancies could determine the sensing properties of the semiconductor system [29]. Generally, oxygen vacancies are known to be the most common defects and usually act as radiative centers in luminescence processes, and can also serve as deeply trapped holes in the semiconductors [30,31]. Given that water molecule acts as one kind of electron donor due to the lone electron pair attributed by its oxygen atom and can be adsorbed by physisorption [22].…”

Effect of pyrolytic temperature on the properties of TiO2/ITO films for hydrogen sensing

“…Anatase TiO2 has drawn much attention, especially in renewable energy and environmental applications [4]. Because of its chemical stability, anatase TiO2 is a significant material in gas sensing applications [5], Moreover anatase TiO2 suffers from poor conductivity due to its wide band gap, and this usually causes increased resistance of electronic components when working. Since hydrogen is considered as a reducing gas which causes significant reduction in resistance, anatase TiO2 is considered to be ideal semiconducting material for wide use in detecting hydrogen [6].…”