Exploration of New Bismuth Oxides with Controlled Valence

价态可控的新型氧化铋的探索

• 批准号: 12650668
• 负责人: KUMADA Nobuhiro
• 金额: $ 1.79万
• 依托单位: UNIVERSITY OF YAMANASHI
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650668/
• 关键词: Bismuth Oxide; Mixed Valence; Hydrothermal Reaction; Crystal Structure

We have obtained the following results by hydrothermal reactions using a hydrated sodium bismuth oxide (NaBiO_3・nH_2O) as a strating material.I. When alkaline chromate solution was used, a new compound, CrBi_8O_15 was found and its crystalstructure was determined by using single crystal X-ray diffraction data. The crystal structure hasa slab built up by (CrO_4)^<2-> tetrahedra and bismuth polyhedra formed by coordination of 5 〜 8 oxygen atoms. The distance of lone pair from nucleus for bismuth atoms ranges from 0.53 to 1.32A, depending on the coordination environment.II. Several new bismuth compounds have been obtained when manganese, vanadium molybdenum and tungsten solutions were used. The characterization of these new compounds are under investigation.III. New bismuth oxides are attempted to use as oxidation catalysis.New bismuth compounds were also prepared by using AgBiO_3 which was obtained by hydrothermal reactions using NaBiO_3・nH_2O and these new compounds are tried to solve their crystal structure.New compounds were obtained in the MgO-Nb_2O_5-Bi_2O_3 system by high temperature solid state reactions as well as hydrothermal reactions. The characterization of these new compounds are under investigation.

我们以水合铋酸钠（NaBiO_3·nH_2O）为原料，通过水热反应得到了以下结果：I.在碱性铬酸盐溶液中，发现了一种新化合物CrBi_8O_15，并用单晶X射线衍射数据确定了它的晶体结构。晶体结构由（CrO_4）_4四面体<2->和5 ~ 8个氧原子配位形成的铋多面体组成的层状结构。铋原子的孤对电子距原子核的距离在0.53 - 1.32埃之间，这取决于配位环境。在锰、钒、钼、钨溶液中，得到了几种新的铋化合物。这些新化合物的特性正在研究之中。在MgO-Nb_2 O_5-Bi_2O_3体系中，通过高温固相反应和水热反应合成了新的铋化合物。这些新化合物的特性正在研究中。

项目成果

D.Wang et al.: "Non-aqueous Synthesis and Structure of a Novel Monodimensional Zirconium Phosphate : [NH_4]_3[Zr(OH)_2(PO_4)(HPO_4)]"Chem.Letters. 2002. 398-399 (2002)

D.Wang 等人：“新型单维磷酸锆的非水合成和结构：[NH_4]_3[Zr(OH)_2(PO_4)(HPO_4)]”Chem.Letters。

N.Kumada et. Al.: "Synthesis and crystal structure of Holladite-type K_xNb_yTi_<8-y>O_16 (x【less than or equal】1.15, 0【less than or equal】y【less than or equal】1)"J.Ceram.Soc.Japan. in press.

N.Kumada等人：“Holladite型K_xNb_yTi_<8-y>O_16的合成及晶体结构（x【小于等于】1.15，0【小于等于】y【小于等于】1） “J.Ceram.Soc.Japan. 正在出版。

N.Kumada et al.: "Single Crystal Structure Refinement of Mg_4Nb_2O_9"Mater. Res. Bull.. 35. 1017-1021 (2000)

N.Kumada 等：“Mg_4Nb_2O_9 的单晶结构细化”材料。

D.Wang et al.: "The First Organically templated Layered Cerium Phosphate-Hydrogen Sulfates : [enH_2]_<0.5>[Ce^<III>(PO_4)(SO_4)(OH_2)]"Chem. Letters. 2002. 1120-1121 (2002)

D.Wang 等人：“第一个有机模板化层状磷酸铈-硫酸氢盐：[enH_2]_<0.5>[Ce^<III>(PO_4)(SO_4)(OH_2)]”Chem.

R.Yu et al.: "Crystal Structures of a Novel Iron-Cobalt Phosphate Fluorides"J. Soc. Inorg. Mater.. 9. 99-103 (2002)

R.Yu等：“新型铁钴磷酸盐氟化物的晶体结构”J。