Molybdic acid aggregates were prepared by the reaction of ammonium molybdate with HNO3 and HCl in a coexisting HAc or cetyl-trimethyl ammonium bromide (CTAB) solution, respectively. The results indicate that the size and morphology of as-prepared molybdic acid aggregates and annealed products-α-MoO3 powder were affected by the concentration of ammonium molybdate, HAc and CTAB. The molybdic acid aggregates with diameter of 1--2μm and length of several decades-micron can be obtained by the reaction of higher-concentration ammonium molybdate with HNO3 in a coexisting HAc or CTAB solution, repectively. After the as-prepared molybdic acid aggregates are annealed at 500--600℃ for 3h, the nanometer-scaled lamellate and sub-micrometer MoO3 powder are prepared. In addition, irregular molybdic acid aggregates rods are achieved by the reaction of lower-concentration ammonium molybdate with HCl in a coexisting CTAB solution.
GUAN Zi-Sheng
,
ZHANG Yu
,
LU Yan-Jun
. Preparation of Molybdic Acid Aggregates and Molybdenum Trioxide Powder with Controllable Size and Morphology[J]. Journal of Inorganic Materials, 2008
, 23(3)
: 636
-640
.
DOI: 10.3724/SP.J.1077.2008.00636
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