Novel Photocatalyst ZrW2O7(OH)2(H2O)2 for Photocatalytic H2 and O2 Evolution from Water Splitting

doi:10.3724/SP.J.1077.2010.00018

Abstract

Abstract: ZrW₂O₇(OH)₂(H₂O)₂ powder was prepared by a hydrothermal reaction method and its thermal decomposition property, crystal structure, photon absorption property and specific surface area were characterized by TG-DTA, XRD, DRS and BET, respectively. Its photocatalytic activity for H₂ and O₂ evolution from water splitting under UV light irradiation was examined in the presence of CH₃OH as electron donor and AgNO₃ as electron scavenger. The results show that ZrW₂O₇(OH)₂(H₂O)₂ is crystallized well in tetragonal phase, with absorption edge of 310nm, band gap energy of 3.9eV, and specific surface area of 5.9m²/g. The average rate of H₂ evolution over 0.3wt% Pt/ZrW₂O₇(OH)₂(H₂O)₂ is 3.7μmol/h and the average rate of O₂ evolution over ZrW₂O₇(OH)₂(H₂O)₂ is 27.8μmol/h, respectively. It is concluded that the hydroxy group containing ZrW₂O₇(OH)₂(H₂O)₂has suitable band structure and possesses the photocatalytic ability to split water.

Key words: water splitting, photocatalyst, ZrW₂O₇(OH)₂(H₂O)₂, hydroxy group

CLC Number:

O643

JIANG Li,YUAN Jian,SHANGGUAN Wen-Feng. Novel Photocatalyst ZrW₂O₇(OH)₂(H₂O)₂ for Photocatalytic H₂ and O₂ Evolution from Water Splitting[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2010.00018.

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Novel Photocatalyst ZrW₂O₇(OH)₂(H₂O)₂ for Photocatalytic H₂ and O₂ Evolution from Water Splitting

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