Surface Structure and Photocatalytic Properties of Bi2WO6 Nanoplatelets Modified by Molybdena Islands from Chemical Vapor Deposition

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• 作者：Arne Dittmer ; Jasper Menze ; Bastian Mei ; Jennifer Strunk ; Henry S. Luftman ; Ramona Gutkowski ; Israel E. Wachs ; Wolfgang Schuhmann ; Martin Muhler
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：August 18, 2016
• 年：2016
• 卷：120
• 期：32
• 页码：18191-18200
• 全文大小：577K
• 年卷期：0
• ISSN：1932-7455

文摘

We report on a novel route of preparing molybdena-modified bismuth tungstates and their successful application in the photocatalytic oxygen evolution reaction and the oxidation of glycerol. Hierarchically assembled monocrystalline Bi₂WO₆ nanoplatelets with a specific surface area of 10 m²/g were obtained applying a hydrothermal synthesis method using Na₂WO₄ and Bi(NO₃)₃ as precursors, followed by a solvent-free chemical vapor deposition method using Mo(CO)₆, resulting in highly dispersed molybdena species. Extensive characterization using X-ray photoelectron spectroscopy, low-energy ion scattering, and Raman spectroscopy showed that microcrystalline MoO₃ islands were formed on the bismuth tungstate surface that grew in height and lateral dimension with increasing loading. Correspondingly, the molybdena-modified materials were found to have favorable photocatalytic and photoelectrochemical properties in the oxygen evolution reaction and the selective oxidation of glycerol.