期刊
MATERIALS LETTERS
卷 177, 期 -, 页码 135-138出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.04.143
关键词
Nanocrystalline; Mesoporous; NiWO4; Photoelectrochemical oxidation
资金
- National Plan for Science, Technology and Innovation (MAARIFAH), King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals (KFUPM), Kingdom of Saudi Arabia [10-NAN1387-04]
Nanocrystalline mesoporous nickel tungstate (m-NiWO4) was synthesized via surfactant assisted hydrothermal templating technique. TEM, HRTEM and N-2 sorption analysis verified the presence of mesoporous textured surface. These nanocrystals were near-spherical in shape with the size variation between 4 and 8 nm, and possessed high surface area (79 m(2) g(-1)). The nanocrystals were in monoclinic (wolframite structure) symmetry and possessed a band gap of 2.6 eV as shown by the XRD and optical measurements. The m-NiWO4 exhibited much better photoelectrochemical H2O oxidation than TiO2 and non-mesoporous NiWO4 nanocrystals due to the enhanced crystallinity, surface morphology and mesoporosity. (C) 2016 Elsevier B.V. All rights reserved.
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