Development of Monodisperse Mesoporous Microballs Composed of Decahedral Anatase Nanocrystals

Chang, Ying; Jiang, Jiayi; Wei, Zhishun; Kowalska, Ewa

Development of Monodisperse Mesoporous Microballs Composed of Decahedral Anatase Nanocrystals

Chang, Ying; Jiang, Jiayi; Wei, Zhishun et al.

Catalysts, 2022, 12(4), 408

Permalink : https://hdl.handle.net/2115/86390

このアイテムのアクセス数:277件（2026-01-19 23:45 集計）

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https://doi.org/10.3390/catal12040408

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アクセス権	metadata only access
URI	https://hdl.handle.net/2115/86390
タイトル	Development of Monodisperse Mesoporous Microballs Composed of Decahedral Anatase Nanocrystals
著者	Chang, Ying ; Jiang, Jiayi ; Wei, Zhishun ; Kowalska, Ewa
著者名 Chang, Ying
著者名 Jiang, Jiayi
著者名 Wei, Zhishun
ORCID 0000-0003-0955-9268 著者名 Kowalska, Ewa
言語	英語
キーワード	anatase nanocrystal
	decahedral anatase
	faceted titania
	heterogeneous photocatalysis hierarchical structure
	mesoporous microballs
	{001} facets
	{101} facets
	TiO2
発行日	2022-04
出版者	MDPI
収録物名	Catalysts
巻(号)	12(4)
ページ	408
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	2073-4344
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/catal12040408