zinc tungstate

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 过渡金属有机体
• 英文名称: zinc tungstate
• 英文别名: Tungsten;ZINC;tetrahydrate
• 化学式: O₄WZn
• 分子量: 313.238
• InChiKey: KUFVQUIFJIZXBH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -3.3
• 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：
  4
• 氢给体数：
  4
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  sodium tungstate (VI) dihydrate 、 zinc(II) acetate dihydrate 在 4-十二烷基苯磺酸钠盐 作用下， 以 1,2-丙二醇 、 水 为溶剂， 反应 8.0h， 生成 zinc tungstate
  参考文献：
  名称：

  Effects of sodium dodecyl benzene sulfonate on the crystal structures and photocatalytic performance of ZnO powders prepared by hydrothermal method

  摘要：

  A facile and efficient route for the controllable synthesis of ZnO nanostructures by hydrothermal method using sodium dodecyl benzene sulfonate (SDBS) as surfactant was reported. The obtained products were well characterized with the aid of various techniques to probe their crystallographic, morphological, chemical, electrochemical and optical properties. The prepared products were used as photocatalysts in the application of the degradation of metronidazole (MNZ)-contained wastewater under visible light irradiation. A 4.5-fold augmentation of degradation efficiency was in turn observed for optimal ZnO (ZO-0.75) photocatalyst compared with that of sample without SDBS addition (ZO) under the visible light irradiation. The effects of SDBS dosage on the crystal structures of prepared samples as well as the crystal growth mechanism were also probed. (C) 2015 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jallcom.2015.07.109

文献信息

• Selective photocatalytic oxidation of aromatic alcohols to aldehydes with air by magnetic WO₃ZnO/Fe₃O₄. <i>In situ</i> photochemical synthesis of 2-substituted benzimidazoles
  作者：Bozhi Li、Reza Tayebee、Effat Esmaeili、Mina S. Namaghi、Behrooz Maleki

  DOI：10.1039/d0ra08403d

  日期：——

  light-driven organic photochemical synthesis has been a pioneering field of interest from academic and industrial associations due to its unique features of green and sustainable chemistry. Herein, WO3ZnO/Fe3O4 was synthesized, characterized, and used as an efficient magnetic photocatalyst in the preparation of a range of 2-substituted benzimidazoles via the condensation of benzyl alcohol and o-phenylenediamine

  近年来，可见光驱动的有机光化学合成因其独特的绿色和可持续化学特点而成为学术界和工业界关注的前沿领域。本文合成、表征了 WO 3 ZnO/Fe 3 O 4 ，并将其用作有效的磁性光催化剂，通过苯甲醇和邻苯二胺在乙醇中在室温下缩合制备一系列 2-取代苯并咪唑。第一次。这项工作的主要特点是在大气和没有任何其他氧化剂的情况下将苯甲醇原位光催化氧化为苯甲醛。通过XRD、FT-IR、VSM 和 SEM 对这种新型异质纳米光催化剂进行了表征。本方法的主要优点是反应时间短、成本效益高、底物范围广、易于通过外部磁铁进行后处理以及优异的产品产率。还充分研究了许多有效的实验参数，以明确该协议的广泛性和通用性。
• Chemical-state analyses of Ni, Zn, and W ions in NiWO4–ZnWO4 solid solutions by X-ray photoelectron spectroscopy
  作者：G. Bakradze、A. Kalinko、A. Kuzmin

  DOI：10.1016/j.jpcs.2021.110425

  日期：2022.2

  with Zn ions is accompanied by an increase of the Ni–O bond ionicity and an increase of the W–O bond covalency. These changes are attributed to the charge redistribution among [NiO6] and [WO6] structural units. We show that a careful in-depth analysis of XPS data obtained with a laboratory-based X-ray photoelectron spectroscopy system can give chemically sensitive, qualitative information on the changes

  通过X射线光电子能谱研究了微晶NiWO 4 -ZnWO 4固溶体中Ni、Zn和W的化学状态。Ni 2p、Zn 2p 和 W 4f 光电子线和 Ni L 2 M 23 M 45、Zn L 3 M 45 M 45和 WN 4 N 67 N 7的记录光谱随着 Zn 浓度的增加，俄歇过渡线显示出明显的变化。将解析出的光电子和俄歇跃迁线的位置结合起来，为固溶体中的金属离子构建所谓的化学状态图（瓦格纳或俄歇参数图）。随着 Zn 浓度的增加，Ni 的俄歇参数增加，W 的俄歇参数减少，从而证明核电离的 Ni 和 W 离子周围的电子极化率分别降低和增加。同时，Zn-O 键的特性和 Zn 离子周围的局部结构没有改变。结论是，NiWO 4用Zn 离子稀释伴随着Ni-O 键离子性的增加和W-O 键共价键的增加。这些变化归因于 [NiO6 ]和[WO 6 ]结构单元。我们表明，对使用基于实验室的 X 射线光电子能谱系统获得的
• Low-Temperature Glass Bonding for Development of Silicon Carbide/Zirconium Tungsten Oxide Porous Ceramics with Near Zero Thermal Expansion Coefficient
  作者：Anurat Poowancum、Koji Matsumaru、Kozo Ishizaki

  DOI：10.1111/j.1551-2916.2011.04520.x

  日期：2011.5

  Near zero thermal expanding porous ceramics are useful in many applications in advanced manufacturing techniques, especially electronics engineering. Zirconium tungsten oxide (ZrW2O8) has been expected to be an excellent negative thermal expansion material for reducing thermal expansivity of composites. However, at 777 degrees C ZrW2O8 decomposes to ZrO2 and WO3, which have positive thermal expansion coefficient and limit applications of ZrW2O8. Therefore, a low temperature sintering technique is required to use ZrW2O8 in zero thermal expanding composite. This work develops a low temperature glassy bonding agent to fabricate near zero thermal expanding SiC/ZrW2O8 porous ceramics. The results show ZrW2O8 reacts with alkali and alkaline earth oxides at lower temperatures than the decomposition temperature of ZrW2O8. Nevertheless, ZrW2O8 is inert with Al2O3, B2O3, and SiO2. By using borosilicate glass (B2O3-SiO2) as a bonding agent, SiC/ZrW2O8 porous ceramics are sintered at temperatures lower than the decomposition temperature of ZrW2O8 and have near zero thermal expansion coefficient (-0.2 x 10(-6) K-1). No reaction is found between the glassy bonding agent and ZrW2O8 or SiC.
• A facile microwave solvothermal process to synthesize ZnWO4 nanoparticles
  作者：Jinhong Bi、Ling Wu、Zhaohui Li、Zhengxin Ding、Xuxu Wang、Xianzhi Fu

  DOI：10.1016/j.jallcom.2009.02.029

  日期：2009.7

  ZnWO4 nanoparticles were synthesized by a facile microwave-assisted solvothermal process. The X-ray diffraction results indicated that the as-synthesized nanoparticles exhibited only wolframite structure ZnWO4 without impurities. The transmission electron microscopy(TEM) images revealed that the particle size of synthesized nanoparticles were around 10 nm. All samples showed a band-gap of 3.8 eV. The photocatalytic activities were evaluated by the decomposition of salicylic acid and Rhodamine B under UV light irradiations. The results showed that the samples prepared by the microwave solvothermal process exhibited higher photocatalytic activities than that prepared by the conventional solvothermal process. (C) 2009 Elsevier B.V. All rights reserved.
• Neutron powder diffraction study of the scintillator material ZnWO4
  作者：P. F. Schofield、K. S. Knight、G. Cressey

  DOI：10.1007/bf00355995

  日期：1996.6

  With a view to the technological applications of ZnWO4 crystals, we have performed Rietveld profile refinement of medium-resolution, time-of-flight, neutron powder diffraction data of synthetic ZnWO4 to improve the quality of the current crystal structure derived from single crystal X-ray techniques that produced a final solution with an R factor of only 10%. The new structural data for ZnWO4, monoclinic space group P2/c, lattice parameters of 0.469263(5), 0.572129(7), 0.492805(5) nm for a, b and c respectively, and a beta angle of 90.6321(9)degrees with two formula units per unit cell. The ZnO6 octahedra contain 3 pairs of Zn-O bonds of 0.2026(2), 0.2090(2) and 0.2227(3) nm and the WO6 octahedra contain 3 pairs of W-O bonds 0.1789(2), 0.1914(2) and 0.21331(3) nm. These new data confirm the basic structure of ZnWO4 and provide accurate off-centring magnitudes for the Zn and W cations.