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Development of Monodisperse Mesoporous Microballs Composed of Decahedral Anatase Nanocrystals
| Title: | Development of Monodisperse Mesoporous Microballs Composed of Decahedral Anatase Nanocrystals |
| Authors: | Chang, Ying Browse this author | | Jiang, Jiayi Browse this author | | Wei, Zhishun Browse this author | | Kowalska, Ewa Browse this author →ORCID |
| Keywords: | anatase nanocrystal | | decahedral anatase | | faceted titania | | heterogeneous photocatalysis hierarchical structure | | mesoporous microballs | | {001} facets | | {101} facets | | TiO2 |
| Issue Date: | Apr-2022 |
| Publisher: | MDPI |
| Journal Title: | Catalysts |
| Volume: | 12 |
| Issue: | 4 |
| Start Page: | 408 |
| Publisher DOI: | 10.3390/catal12040408 |
| Abstract: | Mesoporous monodisperse microballs of amorphous titania were prepared from solution of absolute ethanol, tetrabutyl titanate (TBOT) and potassium chloride via a sub-zero sol-gel route. The as-obtained microballs were used as the precursor in an alcohothermal (ethanol with a small amount of water) process to synthesize monodisperse mesoporous microballs built of decahedral anatase nanocrystals. FE-SEM observation and XRD analysis have confirmed that the formed decahedral anatase-rich powder retained the original spherical morphology of the precursor. Importantly, a hierarchical structure composed of faceted anatase has been achieved under green conditions, i.e., fluorine-free. Additionally, the hysteresis loops (BET results) have confirmed the existence of mesopores. Interestingly, faceted microballs show noticeable photocatalytic activity under UV/vis irradiation for hydrogen generation without any co-catalyst use, reaching almost forty times higher activity than that by famous commercial titania photocatalyst-P25. It has been proposed that enhanced photocatalytic performance is caused by mesoporous structure and co-existence of two kinds of facets, i.e., {001} and {101}, and thus hindered charge carriers' recombination. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/86390 |
| Appears in Collections: | 触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: Ewa Kowalska
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