Photoelectrochemical Response of TlVO4 and InVO4:TlVO4 Composite

Autor:	Andrew A. Gewirth, Dennis P. Butcher
Rok vydání:	2010
Předmět:	Photocurrent Work (thermodynamics) Materials science General Chemical Engineering Composite number Materials Chemistry Analytical chemistry Density functional theory Orthorhombic crystal system General Chemistry Diffuse reflection Photocatalytic water splitting
Zdroj:	Chemistry of Materials. 22:2555-2562
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm9035659
Popis:	This work presents photoelectrochemical characteristics of TlVO4, a previously uncharacterized candidate for photocatalytic water splitting. Additionally, a composite of InVO4 and TlVO4 was synthesized by a facile solution method using orthorhombic InVO4 as a seed for growth of crystallographically similar orthorhombic TlVO4. Photoelectrochemical measurements indicate an increase in photocurrent and more negative flatband potentials for TlVO4 and the InVO4:TlVO4 composite relative to InVO4. Diffuse reflectance UV−visible measurements were used to determine bandgaps of 3.50 eV, 2.94 eV, and 2.98 eV for InVO4, TlVO4, and InVO4:TlVO4, respectively. Density functional theory (DFT) calculations were performed to elucidate the band structures and correlate well with experimental data. The results indicate higher photoelectrochemical activity for TlVO4 and the InVO4:TlVO4 composite relative to InVO4.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1e88b94d7c1044560829badeddee6934 https://doi.org/10.1021/cm9035659 Zobrazit plný text záznamu