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Title
Japanese: 
English:Effect of MoOx modification on photocatalytic activity of hydroxyapatite and Ti-doped hydroxyapatite 
Author
Japanese: JiraborvornpongsaNoppakhate, 磯部敏宏, 山口晃, 宮内雅浩, 若村正人, 中島章.  
English: Noppakhate Jiraborvornpongsa, Toshihiro Isobe, Akira Yamaguchi, Masahiro Miyauchi, Masato Wakamura, Akira Nakajima.  
Language English 
Journal/Book name
Japanese: 
English:Advanced Powder Technology 
Volume, Number, Page Vol. 30        Page 1617-1624
Published date May 22, 2019 
Publisher
Japanese: 
English:Elsevier 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.1016/j.apt.2019.05.010
Abstract Titanium-doped hydroxyapatite (Ti-HAp, (Ca10-2x, Tix, hx) (PO4)6(OH)2, h: defect in Ca site) and hydrox- yapatite (HAp, Ca10(PO4)6(OH)2) powders were modified with an ethanol solution of molybdenyl acety- lacetonate (MoO2(C5H8O2)2) using chemisorption calcination cycle (CCC) technique, which provides metal oxide clusters. Their photocatalytic activity under UV illumination was evaluated by the decompo- sition of gaseous 2-propanol. The photocatalytic activity of the Mo-modified Ti-HAp samples increased concomitantly with increasing Mo concentration up to 0.72% against P. The highest photocatalytic activ- ity of Mo-modified Ti-HAp was about 13 times higher than that of Ti-HAp. The signal appearance of Mo (V) in electron spin resonance spectra and the decrease of photoluminescence intensity suggest electron transfer from the Ti-hybridized band to the MoOx cluster, which suppresses recombination of the pho- toinduced electron and hole pairs. The photocatalytic activity of Mo-modified HAp samples was attribu- ted to HOMO–LUMO excitation of MoOx cluster.

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