Microstructural modification of hollow TiO2 nanospheres and their photocatalytic performance
| Autor: | Mei Zhang, Hua Song, Helong Xu, Xueqin Wang, Wenyi Wang, Qihui Chen, Man Dai, Junlei Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Carbonization Dispersity General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry Resorcinol engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Chemical engineering Coating chemistry Stöber process engineering Photocatalysis 0210 nano-technology Porosity |
| Zdroj: | Applied Surface Science. 535:147641 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2020.147641 |
| Popis: | The microstructure of photocatalysts plays a key role in enhancing their photocatalytic performance. Herein, resorcinol/formaldehyde (RF) polymer resin was prepared using the extended Stober process and used for hard templates. Hollow TiO2 spheres (HTS) were synthesized via hydrolysis of a versatile kinetics-controlled coating and carbonization method. The physicochemical properties of as-prepared catalysts were characterized. The pure RF template had a uniform diameter of ~450 nm. By adjusting the ammonia dosage from 0.1 to 0.35 mL, monodisperse RF@TiO2 spheres were obtained with a porous TiO2 shell of ~25–160 nm in thickness. The concentration of ammonia had a significant effect on the micromorphology, and hence, the photocatalytic properties of the HTS. The Brunauer-Emmett-Teller surface area and pore volume were ~30 m2/g and 0.082 cm3/g, respectively. The intrinsically high conductivity of the HTS microspheres and their high surface area resulting from this robust hollow structure was beneficial for photocatalytic performance toward phenol decomposition. |
| Databáze: | OpenAIRE |
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