Enhanced Visible-Photocatalytic Activities in Strong Acids and Strong Alkalis of Flexible Iron–SrTiO₃ Nanofibrous Membranes

Abstract

Traditional SrTiO 3 (STO) materials have high brittleness and poor deformation resistance. In this work, macroscopically flexible iron-doped SrTiO 3 (SFTO) nanofibrous membranes were prepared by electrospinning and calcination, which can be easily isolated and can maintain integrity to recycle as photocatalysts. Moreover, the SFTO nanofibrous membranes showed enhanced photocatalytic performance under strong acids (pH = 2) and strong alkalis (pH = 12). The SFTO nanofibrous membranes increased the catalytic rate of Congo red (CR) dye by about 10 times in visible light. The mechanism of photocatalytic activity enhancement was discussed by the combined effects of hydroxyl radicals and superoxide radicals. The successful preparation of SFTO nanofibrous membranes has offered a simple and economical approach to photocatalysis as well as environmental remediation.

Yeast Reduced Ti3+ Self-Doped SrTiO3/rGO-In-Ni2P Nanocomposite for Efficient Visible Light-Driven Hydrogen Generation

“…Moving on to Figure B, the binding energies of 456.3, 457.9, 462.1, and 463.5 eV from the Ti 2p high resolution spectra are attributed to Ti 3+ 2p 3/2 , Ti 4+ 2p 3/2 , Ti 3+ 2p 1/2 , and Ti 4+ 2p 1/2 states consistent with the prior research. From Figure C, the O 1s peak at 527.8 eV corresponding to the bridging oxygen on the surface of the SrTiO 3 /yrGO composite . The participation of oxygen atoms in mediating bonds between Sr and Ti at the interface of yrGO within the SrTiO 3 structure is diminished, leading to the attribution of the peak at 530 eV to oxygen vacancies present within the composite.…”