Hydrogen production using economical and environmental friendly nanoparticulate hydroxyapatite and its ion doping

• Published in: International journal of hydrogen energy Vol. 42; no. 8; pp. 5056 - 5062
• Main Authors: Yaemsunthorn, Kasidid, Randorn, Chamnan
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 23.02.2017
• Subjects: Hydrogen; Hydroxyapatite; Photocatalytic; Water splitting; Photocatalytic; Water splitting; Hydroxyapatite; Hydrogen
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2016.11.058

Hydrogen production may be achieved using hydroxyapatite (HA) and ion-doped HA, economical and environmentally photocatalysts. HAs with a new minor absorption peak related to the increased photoactivity were discovered. Nanostructural characteristics of synthesized nanocrystalline hydroxyapatite were investigated. Ti4+ cation incorporation and Zn2+, F− co-substituted HA were also produced and evaluated. Particle sizes of approximately 10–30 nm with considerably large surface area were obtained after heat treatment. HA shows moderate efficiency, having a 27.6 μmol h−1 g−1 hydrogen production rate under UV radiation, probably because of the minor peak at approximately 375 nm. However, the hydrogen production rate of the Ti4+-incorporated sample increased by a factor of 2.6, 72.3 μmol h−1 g−1 •HA with a new minor absorption peak.•Photocatalytic water splitting was achieved using HA photocatalyst.•TiHA, ZnFA and ZnFHA can be synthesized using peroxide based route.