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Controllable Preparation of Multishaped Micro/Nanosized Hydrated Nickel Molybdate via Chelator-Assisted Hydrothermal Route
Abstract:
Nickel molybdate is one of the significant and frequently-used basis materials for catalyst. The micro/nanohydrated nickel molybdate with different shapes has been successfully prepared via hydrothermal route using chelator as shape-control agent under the pH values from 4.5 to 6.4. The x-ray powder diffractometry, transmission electron microscope and scanning electron microscope were employed for the characterization and analysis of the phase, morphology and size of the resulting products. The chelator plays a key role for the shape and crystalline degree of the hydrated nickel molybdate. With the pH values of the initial suspension set below 4.5 or above 6.4, no any solid products could be obtained despite using the same hydrothermal preparation conditions. The formation mechanism of the related products with multiple shapes has been proposed.
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249-252
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Online since:
August 2013
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© 2013 Trans Tech Publications Ltd. All Rights Reserved
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