钼酸铵在醋酸和十六烷基三甲基溴化铵(CTAB)调节下分别与硝酸和盐酸反应制备了多钼酸聚集体. 结果表明, 钼酸铵的浓度、醋酸和CTAB对多钼酸聚集体及其烧结后形成MoO3粉体的形貌和尺寸有影响. 较高浓度的钼酸铵分别在醋酸和CTAB调节下与硝酸反应均可制备直径为1~2μm, 长为数十微米的细长晶须, 经过500~600℃烧结后则相应变为纳米级片状和颗粒状α-MoO3粉体; 低浓度的钼酸铵在CTAB调节下与盐酸反应可制备不规则的晶体棒, 经过烧结后得到颗粒状α-MoO3粉体.
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.
参考文献
| [1] | Yao J N, Ashimoto K H, Fujishima A. Nature, 1992, 355 (6361): 624--626. [2] Patil R S, Uplane M D, Patil P S. Appl. Surf. Sci., 2006, 252 (23): 8050--8056. [3] Kouta H, Ichiro M, Norimitsu M, et al. Chem. Mater., 2005, 17 (2): 349--354. [4] Martins R L, Baldanza M A S, Souza M M V M, et al. Appl. Catal. A-Gen. 2007, 318 (20): 207--212. [5] 章俞之, 快素兰, 黄银松, 等. 物理化学学报, 2001, 17 (1): 79--82. [6] 尹周澜. 物理化学学报, 1996, 12 (2): 181-184. [7] 秦文峰. 微波能在钼化学品中的应用研究. 昆明: 昆明理工大学硕士论文, 2004. [8] 任引哲,王建英, 王玉湘. 化学通报, 2002, 65 (1): 47--49. [9] Lou X W, Zeng H C. Chem. Mater, 2002, 14 (11): 4781--4789. [10] Wei X M, Zeng H C. J. Phys. Chem. B, 2003, 107 (12): 2619--2622. [11] Krishnan C V, Chen J, Burger C, et al. J. Phys. Chem. B, 2006, 110 (41): 20182--20188. [12] Guan Z S, Zhang Y, Zhang Q, et al. J. Colloid Interface Sci., 2006, 302 (1): 113--122. [13] Muraoka Y, Grenier J C, Pouchard M. Solid State Sci., 1999, 1 (2-3): 133--148. [14] Nazri.G A, Julien C. Solid State Ionics., 1995, 80 (3-4): 271--275. [15] 郑汝骊, 王恩波. 化学通报, 1984, 47 (9): 12--16. [16] Hagrman P J, LaDuca R L Jr, Koo H J, et al. Inorg. Chem., 2000, 39 (19): 4311--4317. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%