Enhanced photocatalytic performance of mesoporous TiO2 nanofibers by oriented nanocrystals
Invited conference paper presented and published in conference proceedings


Full Text

Other information
AbstractThe development of well-defined TiO2 nanoarchitectures is a versatile strategy to achieve high-efficiency photocatalytic performance. In this study, mesoporous TiO2 nanofibers consisting of oriented nanocrystals were fabricated by a facile vaporthermal-assisted topochemical transformation of preformed H-titanate nanobelts. The vaporthermal temperature is crucial in tuning the microstructures and photocatalytic redox properties of the resulting mesoporous TiO2 nanofibers. The microstructures were characterized with XRD, TEM, and nitrogen adsorption–desorption isotherms, etc. The photocatalytic activities were evaluated by photocatalytic oxidation of organic pollutant (Rhodamine B as an example) as well as photocatalytic reduction of water to generate hydrogen (H2). The nanofibers vaporthermally treated at 150 °C showed the highest photocatalytic activity in both oxidation and reduction reactions, 2 times higher than that of P25. The oriented alignment and suitable mesoporosity in the resulting nanofiber architecture were crucial for enhancing photocatalytic performances. The oriented alignment of anisotropic anatase nanocrystals shall facilitate faster vectorial charge transportation along the nanofibers architecture. And, the suitable mesoporosity and high surface area would also effectively enhance the mass exchange during photocatalytic reactions. This study demonstrates a novel and facile method to fabricate mesoporous TiO2 nanofibers with high photocatalytic activity for both clean energy production and environmental purification.
All Author(s) ListGuocheng Huang, Shengwei Liu, Po Keung Wong
Name of Conference3rd International Workshop on Graphene and C3N4-based Photocatalysts (IWGCP3)
Start Date of Conference23/03/2019
End Date of Conference26/03/2019
Place of ConferenceWuhan
Country/Region of ConferenceChina
Proceedings Title3rd International Workshop on "Graphene and C3N4-Based Photocatalysts"
Year2019
Month3
Day23
Place of PublicationWuhan
Pages46 - 46
LanguagesEnglish-United States
KeywordsPhotocatalysis, Dye degradation, Hydrogen production, TiO2 nanofiber

Last updated on 2019-03-05 at 17:04