NDLI: Hyperbranched potassium lanthanum titanate perovskite photocatalysts for hydrogen generation

Content Provider	Royal Society of Chemistry (RSC)
Author	Chan, Candace K. Yang, Ting Grewe, Tobias Tüysüz, Harun
Copyright Year	2016
Abstract	Semiconductors with hierarchical nanostructured morphologies may be promising as high surface area photocatalysts for producing hydrogen from water. However, there are few scalable synthesis methods that can achieve such morphologies in metal oxide semiconductors such as titanates. Here, hydrothermal methods were used to synthesize nanostructured potassium lanthanum titanate (KLTO) perovskite without using templates or structure-directing agents. The obtained materials were octahedral particles composed of orthogonal hyperbranched nanowires, a morphology that is usually obtained using catalyst-mediated vapor phase methods. Several fundamental materials properties of KLTO were determined for the first time, including the bandgap (3.3 eV), semiconductor type (n-type), flat band potential, and conduction band maximum (−0.265 V and −0.835 V vs. NHE, respectively). The KLTO hyperbranched structures were also investigated as UV-photocatalysts for H2 production and displayed higher activities than P25 TiO2 and KLTO nanoparticles. The H2 production rate for KLTO decorated with 1 wt% Pt using thermal decomposition of K2PtCl4 reached ca. 2.5 mmol h−1 and was stable for 20 h of irradiation.
Starting Page	2837
Ending Page	2841
Page Count	5
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	4
Issue Number	8
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta07424j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	KLTO Hydrogen Hydrothermal synthesis Potassium Lanthanum Perovskite Orthogonality Band gap Electronvolt Semiconductor Extrinsic semiconductor Valence and conduction bands
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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