molybdic acid | 25942-34-1

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 各种混合金属/非金属
• 英文名称: molybdic acid
• 英文别名: molybdenum acid；Molybdic acid monohydrate；dihydroxy(dioxo)molybdenum;hydrate
• CAS: 25942-34-1
• 化学式: H₂MoO₄*H₂O
• 分子量: 179.969
• InChiKey: BZGUNVKNFGMJAN-UHFFFAOYSA-L

计算性质

• 辛醇/水分配系数(LogP)：
  -2.18
• 重原子数：
  6
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  75.6
• 氢给体数：
  3
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  molybdic acid 以 盐酸 为溶剂， 生成 hexachloromolybdate(III)(3-)
  参考文献：
  名称：

  Molybdena on silica catalysts: selective catalytic oxidation of ammonia to nitrogen over MoO3 on siO2 catalysts

  摘要：

  DOI：

  10.1016/0304-5102(90)85272-j

文献信息

• Hydrothermal Synthesis and Characterization of New Pillared Layered Ethylenediphosphonates of Molybdenum(VI), A₂[Mo₂O₅(O₃PCH₂CH₂PO₃)] (A = NH₄, Tl, Cs, Rb) and K(H₃O)[Mo₂O₅(O₃PCH₂CH₂PO₃)]
  作者：K. Prabhakara Rao、Vidyavathy、M. P. Minimol、K. Vidyasagar

  DOI：10.1021/ic035081p

  日期：2004.7.1

  New ethylenediphosphonates of molybdenum, A[Mo2O5(O3PCH2CH2PO3)] (A = NH4 (1), Tl (2), Cs (3), Rb (4)), and K(H3O)[Mo2O5(O3PCH2CH2PO3)] (5), have been synthesized by a hydrothermal method and structurally characterized by X-ray diffraction, spectroscopic, and thermal studies. These compounds consist of pillared anionic layers [Mo2O5(O3PCH2CH2PO3)]2-, with A+, K+, and H3O+ ions in the interlayer region

  钼的新乙二膦酸酯A [Mo2O5（O3PCH2CH2PO3）]（A = NH4（1），Tl（2），Cs（3），Rb（4））和K（H3O）[Mo2O5（O3PCH2CH2PO3）]（5）已经通过水热法合成，并通过X射线衍射，光谱学和热学研究对其结构进行了表征。这些化合物由带柱状的阴离子层[Mo2O5（O3PCH2CH2PO3）] 2-组成，在层间区域以及阴离子层内的空腔中均带有A +，K +和H3O +离子。已经确定了化合物1和5的单晶X射线结构。它们在Z = 8的正交晶体空间群Cmca中结晶，并具有以下晶胞参数。对于1，a = 25.60（1），b = 10.016（4），c = 9.635（3）埃，对于5，a = 25.63（1），b = 10.007（2），c = 9.512（1）埃。
• Thermal kinetics study on the conversion of β-MoO3 to α-MoO3; A molybdenite concentrate derivative as a catalyst
  作者：Mahtab Vosough、Gholam Reza Khayati、Shahriar Sharafi

  DOI：10.1016/j.tca.2022.179289

  日期：2022.9

  Herein, thermal decomposition kinetics of molybdic acid (MA) obtained from the leaching of molybdenite concentrate are extensively studied as a precursor for the preparation of molybdenum trioxide (MoO3). The thermal kinetics equation of the reaction suggests that the precursor (MA, H2MoO4.H2O) is converted to β-MoO3 and then to α-MoO3 due to the heating process, giving rise to a transformation temperature

  在此，广泛研究了从辉钼精矿浸出获得的钼酸（MA）的热分解动力学，作为制备三氧化钼（MoO 3）的前体。反应的热动力学方程表明，由于加热过程，前体（MA，H 2 MoO 4 .H 2 O）先转化为 β-MoO 3，然后再转化为 α-MoO 3，转化温度为260-320℃，β-MoO 3转化为α-MoO 3的平均活化能约为26.53 ± 0.02 kJ/mol，指前因子为10 7 1/min. 此外，差示扫描量热法揭示了体积扩散机制控制了结晶反应，导致 MA 分解。我们的结果表明，具有成核和三维生长机制的 Johnson-Mehl-Avrami (JMA) 动力学可以以可接受的精度模拟实验数据。稳定的 β-MoO 3 /α-MoO 3化合物的催化特性为甲醇氧化为甲醛的过程提供了超过 89% 的效率。
• A Facile Non-hydrothermal Fabrication of Uniform α-MoO₃Nanowires in High Yield
  作者：Banghua Qi、Xiaomin Ni、Dongguo Li、Huagui Zheng

  DOI：10.1246/cl.2008.336

  日期：2008.3.5

  Uniform α-MoO3 nanowires with the diameter of 60–100 nm and the length of 10–40 μm were fabricated in high yield through a facile non-hydrothermal method. The fabrication process involved acidifying an ethylenediamine solution of molybdenum acid and subsequent calcinating treatment without any hydrothermal procedures. Ethylenediamine was found to play a crucial role for the formation of α-MoO3 nanowires under the present conditions. Thus-prepared α-MoO3 nanowires as supercapacitors exhibited much larger capacitance and better cyclicity than the conventional particulate counterpart.

  通过一种简便的非水热法，我们制备出了高产的、直径为60-100纳米、长度为10-40微米的α-MoO3纳米线。该制备工艺包括将乙二胺溶液酸化成钼酸，然后进行煅烧处理，无需任何水热处理。研究发现，在现有条件下，乙二胺对α-MoO3纳米线的形成起着至关重要的作用。因此，制备的α-MoO3纳米线作为超级电容器，比传统的颗粒状超级电容器具有更大的电容和更好的循环性。
• Synthesis, characterization, and optical properties of Ag2Mo2O7 nanowires
  作者：Muhammad Hashim、Chenguo Hu、Yanxue Chen、Cuiling Zhang、Yi Xi、Jing Xu

  DOI：10.1002/pssa.201026648

  日期：2011.8

  Ag2Mo2O7 nanowires were synthesized by facile hydrothermal method from sodium molybdate and silver nitrate at temperature of 150 °C without any surfactant or template. The synthesized product was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and transmission electron microscopy (TEM). It was found that the product is of anorthic

  Ag2Mo2O7 纳米线是由钼酸钠和硝酸银在 150 ℃ 温度下在没有任何表面活性剂或模板的情况下通过简便的水热法合成的。合成产物通过X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)和透射电子显微镜(TEM)进行表征。结果发现，该产物为非晶相单晶纳米线，宽度为200 nm，长度可达100 µm。紫外-可见反射光谱显示带隙为 2.94 eV。光致发光 (PL) 光谱在室温下表现出以 412 nm 为中心的强紫色发射和 600 至 700 nm 的红色发射。在低温下观察到大大增强的红色发射。
• Thermal decomposition study of selected isopolymolybdates
  作者：M. Grzywa、B. Włodarczyk-Gajda、W. Łasocha

  DOI：10.1007/s10973-008-9207-8

  日期：2009.5

  The thermal decomposition of ammonium trimolybdate (NH4)2Mo3O10·H2O, anilinium trimolybdate (C6NH8)2Mo3O10·4H2O and anilinium pentamolybdate (C6NH8)2Mo5O16 in air and nitrogen has been investigated. The decomposition of molybdates was studied in situ by powder X-ray diffraction. Moreover, results of TG, as well as scanning microscopy studies, are presented. It was found that during thermal treatment in air phases of MoOx type are obtained, while thermal treatment in nitrogen leads to obtaining a mixture of MoyCz and MopNq. It is worth noting that even though chemical decomposition and formation of new compounds took place, in some cases needle-like or plate-like shapes of crystallites were preserved during thermal treatment.

  研究了三钼酸铵（NH4）2Mo3O10-H2O、三钼酸氨（C6NH8）2Mo3O10-4H2O 和五钼酸氨（C6NH8）2Mo5O16 在空气和氮气中的热分解。通过粉末 X 射线衍射对钼酸盐的分解进行了现场研究。此外，还介绍了热重分析和扫描显微镜研究的结果。研究发现，在空气中进行热处理时，会产生 MoOx 型相，而在氮气中进行热处理时，会产生 MoyCz 和 MopNq 的混合物。值得注意的是，尽管发生了化学分解并形成了新的化合物，但在某些情况下，热处理过程中仍保留了针状或板状的晶体形状。