Microorganism-Templated Nanoarchitectonics of Hollow TiO2-SiO2 Microspheres with Enhanced Photocatalytic Activity for Degradation of Methyl Orange

Abstract

In this study, hollow SiO2 microspheres were synthesized by the hydrolysis of tetraethyl orthosilicate (TEOS) according to the Stober process, in which Pichia pastoris GS 115 cells were served as biological templates. The influence of the preprocessing method, the TEOS concentration, the ratio of water to ethanol, and the aging time on the morphology of microspheres was investigated and the optimal conditions were identified. Based on this, TiO2-SiO2 microspheres were prepared by the hydrothermal process. The structures and physicochemical properties of TiO2-SiO2 photocatalysts were systematically characterized and discussed. The photocatalytic activity for the degradation of methyl orange (MO) at room temperature under Xe arc lamp acting as simulated sunlight was explored. The result showed that the as-prepared TiO2-SiO2 microspheres exhibited a good photocatalytic performance.

Block Copolymer and Cellulose Templated Mesoporous TiO2-SiO2 Nanocomposite as Superior Photocatalyst

“…Physicochemical properties of the TiO S3. Comparative study of the photocatalytic activity with different TiO 2 /SiO 2 photocatalysts [59][60][61][62][63][64][65][66].…”

Synthesis of LiDAR-Detectable True Black Core/Shell Nanomaterial and Its Practical Use in LiDAR Applications

“…Numerous studies have reported the synthesis of SiO 2 /TiO 2 core/shell materials with desirable properties in terms of the specific surface area, pore volume, hydrophilicity, and toxicity [ 15 , 16 , 17 ]. SiO 2 /TiO 2 core/shell materials are employed in numerous applications, including as light-scattering materials for dye-sensitized solar cells, nanocarriers for drug delivery, and photocatalysts [ 18 , 19 , 20 , 21 , 22 , 23 ]. Furthermore, the properties of the outermost TiO 2 shell can be manipulated through various surface treatments [ 24 ].…”