モリブデン酸銀(I)とは？わかりやすく解説

モリブデン酸銀(I)
識別情報
CAS登録番号	13765-74-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	10801079 ;
ECHA InfoCard	100.033.962
PubChem CID	16217378;
CompTox Dashboard (EPA)	DTXSID20894908 ;
	InChI InChI=1S/2Ag.Mo.4O/q2+1;;;;2-1 Key: MHLYOTJKDAAHGI-UHFFFAOYSA-N ; InChI=1/2Ag.Mo.4O/q2+1;;;;2-1/r2Ag.MoO4/c;;2-1(3,4)5/q2*+1;-2 Key: ^@€×,&#+=+÷×¥× ndnzjsnssi-QWQXGURBAC ;
	SMILES [Ag+].[Ag+].[O-][Mo]([O-])(=O)=O ;
性質
化学式	Ag2MoO4
モル質量	375.67 g/mol
外観	黄色の結晶
密度	6.18 g/cm3, solid
融点	483 °C (901 °F; 756 K)
水への溶解度	わずかに可溶
構造
結晶構造	立方晶系
関連する物質
関連物質	十モリブデン酸銀(I);
	特記無き場合、データは標準状態 (25 °C [77 °F], 100 kPa) におけるものである。 verify (what is ?)

モリブデン酸銀(I)（モリブデンさんぎんいち、英語: Silver molybdate）は、化学式Ag
2MoO
4で表される無機化合物である。黄色の立方晶系の結晶を形成し、二形性を示す。ガラスに用いられる^[要出典]。

構造

モリブデン酸銀(I)の結晶は、結晶が受ける圧力条件により2種類の電子構造をとる^[1]。常温では、スピネル型立方晶系構造を示し、安定なβ-Ag₂MoO₄として知られるのに対し、高静水圧条件下では、正方晶系構造を示す準安定なα-Ag₂MoO₄が形成される^[2]。

合成と性質

α-Ag2MoO4

α-Ag₂MoO₄は、ドープ剤として3-ビス(2-ピリジル)ピラジン（dpp）を用いた常温での溶液相沈殿により合成される^[3]。最初の溶液のpHが、異なるヘテロ構造（ほうき状、花状、棒状）の形成過程や成長に影響を与える^[4]^[5]。

β-Ag2MoO4

β-Ag₂MoO₄の結晶は、高温での固相反応や酸化物混合^[6]、溶融急冷（melt-quenching）^[7]、チョクラルスキー法により合成される^[8]。

さらに、共沈法^[要出典]、水熱合成、マイクロ波補助水熱合成^[9]、アクリルアミド補助テンプレートの重合反応を用いた動的テンプレート法^[10]、含浸/煆焼法によっても得られる^[11]。

β-Ag₂MoO₄の微結晶は極性溶媒を用いた沈殿法により合成することができる^[12]。

β–Ag₂MoO₄結晶の光触媒特性は、異なる温度における水熱処理によって改良することができる^[13]。超音波化学合成により、銀原子の亜鉛原子への置換によって得られるモリブデン酸銀-亜鉛[β–(Ag_2−2xZnx)MoO₄]の微結晶も、特性の向上に寄与する^[14]。これらの結晶はローダミンBやレマゾールブリリアントバイオレット5Rなどの染料を分解することができる^[13]^[14]。

Ag-Ag2MoO4 composites

Ag-Ag₂MoO₄の複合材料は、マイクロ波補助水熱合成により合成される。これらの複合材料は、可視光下においてローダミンBの分解に対して光触媒活性を示す^[15]。

その他の性質

Ag₂MoO₄とグラファイトとの混合物は、Ni形複合材料に対して優れた潤滑剤としてはたらき、摩擦特性を向上させる^[16]。

脚注

^ Arora, A. K.; Nithya, R.; Misra, Sunasira; Yagi, Takehiko (2012-12-01). “Behavior of silver molybdate at high-pressure”. Journal of Solid State Chemistry 196: 391–397. Bibcode: 2012JSSCh.196..391A. doi:10.1016/j.jssc.2012.07.003.
^ Beltrán, Armando; Gracia, Lourdes; Longo, Elson; Andrés, Juan (2014-02-20). “First-Principles Study of Pressure-Induced Phase Transitions and Electronic Properties of Ag2MoO4”. The Journal of Physical Chemistry C 118 (7): 3724–3732. doi:10.1021/jp4118024. ISSN 1932-7447.
^ Ng, Choon Hwee Bernard; Fan, Wai Yip (2015-06-03). “Uncovering Metastable α-Ag2MoO4 Phase Under Ambient Conditions. Overcoming High Pressures by 2,3-Bis(2-pyridyl)pyrazine Doping”. Crystal Growth & Design 15 (6): 3032–3037. doi:10.1021/acs.cgd.5b00455. ISSN 1528-7483.
^ Singh, D. P.; Sirota, B.; Talpatra, S.; Kohli, P.; Rebholz, C.; Aouadi, S. M. (2012-03-09). “Broom-like and flower-like heterostructures of silver molybdate through pH controlled self assembly”. Journal of Nanoparticle Research 14 (4): 781. Bibcode: 2012JNR....14..781S. doi:10.1007/s11051-012-0781-0. hdl:10533/128243. ISSN 1388-0764.
^ Fodjo, Essy Kouadio; Li, Da-Wei; Marius, Niamien Paulin; Albert, Trokourey; Long, Yi-Tao (2013-01-23). “Low temperature synthesis and SERS application of silver molybdenum oxides”. Journal of Materials Chemistry A 1 (7): 2558–2566. doi:10.1039/c2ta01018f.
^ Suthanthiraraj, S. Austin; Premchand, Y. Daniel (2004-05-01). “Molecular structural analysis of 55mol% CuI-45mol% Ag2MoO4 solid electrolyte using XPS and laser raman techniques”. Ionics 10 (3–4): 254–257. doi:10.1007/BF02382825. ISSN 0947-7047.
^ Rocca, F; Kuzmin, A; Mustarelli, P; Tomasi, C; Magistris, A (1999-06-01). “XANES and EXAFS at Mo K-edge in (AgI)1−x(Ag2MoO4)x glasses and crystals”. Solid State Ionics 121 (1–4): 189–192. doi:10.1016/S0167-2738(98)00546-3.
^ Brown, Stephen; Marshall, Alison; Hirst, Philip (1993-12-20). “The growth of single crystals of lead molybdate by the Czochralski technique”. Materials Science and Engineering: A 173 (1–2): 23–27. doi:10.1016/0921-5093(93)90179-I.
^ Gouveia, A. F.; Sczancoski, J. C.; Ferrer, M. M.; Lima, A. S.; Santos, M. R. M. C.; Li, M. Siu; Santos, R. S.; Longo, E. et al. (2014-06-02). “Experimental and Theoretical Investigations of Electronic Structure and Photoluminescence Properties of β-Ag2MoO4 Microcrystals”. Inorganic Chemistry 53 (11): 5589–5599. doi:10.1021/ic500335x. ISSN 0020-1669. PMID 24840935.
^ Jiang, Hao; Liu, Jin-Ku; Wang, Jian-Dong; Lu, Yi; Yang, Xiao-Hong (2015-07-14). “Thermal perturbation nucleation and growth of silver molybdate nanoclusters by a dynamic template route”. CrystEngComm 17 (29): 5511–5521. doi:10.1039/c5ce00039d.
^ Zhao, Songjian; Li, Zhen; Qu, Zan; Yan, Naiqiang; Huang, Wenjun; Chen, Wanmiao; Xu, Haomiao (2015-10-15). “Co-benefit of Ag and Mo for the catalytic oxidation of elemental mercury”. Fuel 158: 891–897. doi:10.1016/j.fuel.2015.05.034.
^ Cunha, F. S.; Sczancoski, J. C.; Nogueira, I. C.; Oliveira, V. G. de; Lustosa, S. M. C.; Longo, E.; Cavalcante, L. S. (2015-10-28). “Structural, morphological and optical investigation of β-Ag 2 MoO 4 microcrystals obtained with different polar solvents”. CrystEngComm 17 (43): 8207–8211. doi:10.1039/c5ce01662b.
^ ^a ^b Sousa, Giancarlo da Silva; Nobre, Francisco Xavier; Júnior, Edgar lves Araújo; Sambrano, Julio Ricardo; Albuquerque, Anderson dos Reis; Bindá, Rosane dos Santos; Couceiro, Paulo Rogério da Costa; Brito, Walter Ricardo et al. (20 July 2018). “Hydrothermal synthesis, structural characterization and photocatalytic properties of β--Ag2MoO4 microcrystals: Correlation between experimental and theoretical data”. Arabian Journal of Chemistry 13: 2806–2825. doi:10.1016/j.arabjc.2018.07.011.
^ ^a ^b Coimbra, D.W.; Cunha, F.S.; Sczancoski, J.C.; de Carvalho, J.F.S.; de Macêdo, F.R.C.; Cavalcante, L.S. (2019). “Structural refinement, morphology and photocatalytic properties of β-(Ag_2−2xZn_x)MoO₄ microcrystals synthesized by the sonochemical method”. Journal of Materials Science: Materials in Electronics 30 (2): 1322–1344. doi:10.1007/s10854-018-0401-6.
^ Li, ZhaoQian; Chen, XueTai; Xue, Zi-Ling (2013-02-22). “Microwave-assisted hydrothermal synthesis of cube-like Ag-Ag2MoO4 with visible-light photocatalytic activity”. Science China Chemistry 56 (4): 443–450. doi:10.1007/s11426-013-4845-5. ISSN 1674-7291.
^ Liu, Eryong; Gao, Yimin; Jia, Junhong; Bai, Yaping (2013-03-24). “Friction and Wear Behaviors of Ni-based Composites Containing Graphite/Ag2MoO4 Lubricants”. Tribology Letters 50 (3): 313–322. doi:10.1007/s11249-013-0131-0. ISSN 1023-8883.

[:0-1] Arora, A. K.; Nithya, R.; Misra, Sunasira; Yagi, Takehiko (2012-12-01). “Behavior of silver molybdate at high-pressure”. Journal of Solid State Chemistry 196: 391–397. Bibcode: 2012JSSCh.196..391A. doi:10.1016/j.jssc.2012.07.003.

[:1-2] Beltrán, Armando; Gracia, Lourdes; Longo, Elson; Andrés, Juan (2014-02-20). “First-Principles Study of Pressure-Induced Phase Transitions and Electronic Properties of Ag2MoO4”. The Journal of Physical Chemistry C 118 (7): 3724–3732. doi:10.1021/jp4118024. ISSN 1932-7447.

[:2-3] Ng, Choon Hwee Bernard; Fan, Wai Yip (2015-06-03). “Uncovering Metastable α-Ag2MoO4 Phase Under Ambient Conditions. Overcoming High Pressures by 2,3-Bis(2-pyridyl)pyrazine Doping”. Crystal Growth & Design 15 (6): 3032–3037. doi:10.1021/acs.cgd.5b00455. ISSN 1528-7483.

[:3-4] Singh, D. P.; Sirota, B.; Talpatra, S.; Kohli, P.; Rebholz, C.; Aouadi, S. M. (2012-03-09). “Broom-like and flower-like heterostructures of silver molybdate through pH controlled self assembly”. Journal of Nanoparticle Research 14 (4): 781. Bibcode: 2012JNR....14..781S. doi:10.1007/s11051-012-0781-0. hdl:10533/128243. ISSN 1388-0764.

[:4-5] Fodjo, Essy Kouadio; Li, Da-Wei; Marius, Niamien Paulin; Albert, Trokourey; Long, Yi-Tao (2013-01-23). “Low temperature synthesis and SERS application of silver molybdenum oxides”. Journal of Materials Chemistry A 1 (7): 2558–2566. doi:10.1039/c2ta01018f.

[6] Suthanthiraraj, S. Austin; Premchand, Y. Daniel (2004-05-01). “Molecular structural analysis of 55mol% CuI-45mol% Ag2MoO4 solid electrolyte using XPS and laser raman techniques”. Ionics 10 (3–4): 254–257. doi:10.1007/BF02382825. ISSN 0947-7047.

[7] Rocca, F; Kuzmin, A; Mustarelli, P; Tomasi, C; Magistris, A (1999-06-01). “XANES and EXAFS at Mo K-edge in (AgI)1−x(Ag2MoO4)x glasses and crystals”. Solid State Ionics 121 (1–4): 189–192. doi:10.1016/S0167-2738(98)00546-3.

[8] Brown, Stephen; Marshall, Alison; Hirst, Philip (1993-12-20). “The growth of single crystals of lead molybdate by the Czochralski technique”. Materials Science and Engineering: A 173 (1–2): 23–27. doi:10.1016/0921-5093(93)90179-I.

[9] Gouveia, A. F.; Sczancoski, J. C.; Ferrer, M. M.; Lima, A. S.; Santos, M. R. M. C.; Li, M. Siu; Santos, R. S.; Longo, E. et al. (2014-06-02). “Experimental and Theoretical Investigations of Electronic Structure and Photoluminescence Properties of β-Ag2MoO4 Microcrystals”. Inorganic Chemistry 53 (11): 5589–5599. doi:10.1021/ic500335x. ISSN 0020-1669. PMID 24840935.

[10] Jiang, Hao; Liu, Jin-Ku; Wang, Jian-Dong; Lu, Yi; Yang, Xiao-Hong (2015-07-14). “Thermal perturbation nucleation and growth of silver molybdate nanoclusters by a dynamic template route”. CrystEngComm 17 (29): 5511–5521. doi:10.1039/c5ce00039d.

[11] Zhao, Songjian; Li, Zhen; Qu, Zan; Yan, Naiqiang; Huang, Wenjun; Chen, Wanmiao; Xu, Haomiao (2015-10-15). “Co-benefit of Ag and Mo for the catalytic oxidation of elemental mercury”. Fuel 158: 891–897. doi:10.1016/j.fuel.2015.05.034.

[12] Cunha, F. S.; Sczancoski, J. C.; Nogueira, I. C.; Oliveira, V. G. de; Lustosa, S. M. C.; Longo, E.; Cavalcante, L. S. (2015-10-28). “Structural, morphological and optical investigation of β-Ag 2 MoO 4 microcrystals obtained with different polar solvents”. CrystEngComm 17 (43): 8207–8211. doi:10.1039/c5ce01662b.

[Sousa-13] Sousa, Giancarlo da Silva; Nobre, Francisco Xavier; Júnior, Edgar lves Araújo; Sambrano, Julio Ricardo; Albuquerque, Anderson dos Reis; Bindá, Rosane dos Santos; Couceiro, Paulo Rogério da Costa; Brito, Walter Ricardo et al. (20 July 2018). “Hydrothermal synthesis, structural characterization and photocatalytic properties of β--Ag2MoO4 microcrystals: Correlation between experimental and theoretical data”. Arabian Journal of Chemistry 13: 2806–2825. doi:10.1016/j.arabjc.2018.07.011.

[Coimbra-14] Coimbra, D.W.; Cunha, F.S.; Sczancoski, J.C.; de Carvalho, J.F.S.; de Macêdo, F.R.C.; Cavalcante, L.S. (2019). “Structural refinement, morphology and photocatalytic properties of β-(Ag_2−2xZn_x)MoO₄ microcrystals synthesized by the sonochemical method”. Journal of Materials Science: Materials in Electronics 30 (2): 1322–1344. doi:10.1007/s10854-018-0401-6.

[15] Li, ZhaoQian; Chen, XueTai; Xue, Zi-Ling (2013-02-22). “Microwave-assisted hydrothermal synthesis of cube-like Ag-Ag2MoO4 with visible-light photocatalytic activity”. Science China Chemistry 56 (4): 443–450. doi:10.1007/s11426-013-4845-5. ISSN 1674-7291.

[16] Liu, Eryong; Gao, Yimin; Jia, Junhong; Bai, Yaping (2013-03-24). “Friction and Wear Behaviors of Ni-based Composites Containing Graphite/Ag2MoO4 Lubricants”. Tribology Letters 50 (3): 313–322. doi:10.1007/s11249-013-0131-0. ISSN 1023-8883.

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表話編歴銀の化合物
二元化合物	Ag₃As AgBr Ag₂C₂ AgCl AgF AgF₂ AgF₃ Ag₂F AgI AgN₃ Ag₃N AgO Ag₂O Ag₂O₃ Ag₂S Ag₂Se Ag₂Te AgH
多元化合物	Ag₃AsO₄ AgBF₄ AgBrO AgBrO₃ AgCF₃SO₃ AgCH₃COO AgC₁₁H₂₃COO AgC₁₇H₃₅COO AgC₂₁H₄₃COO AgC₃H₅O₃ [Ag(C₅C₅N)₄]S₂O₈ AgClO AgClO₂ AgClO₃ AgClO₄ AgCN AgCNO Ag₂CO₃ Ag₂C₂O₄ Ag₂CrO₄ Ag₂Cr₂O₇ AgHSO₄ AgIO AgIO₃ AgIO₄ Ag₅IO₆ AgMnO₄ Ag₂MoO₄ Ag₆Mo₁₀O₃₃ Ag(NH₃)₂OH AgNO₂ AgNO₃ Ag₂N₂O₂ AgOCN AgOH AgPF₆ Ag₃PO₄ AgReO₄ AgSCN Ag₂SeO₃ Ag₂SO₃ Ag₂SO₄ Ag₂S₂O₃ Ag₂WO₄ CH₃COOAg HCOOAg K[Ag(CN)₂] RbAg₄I₅
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モリブデン酸銀(I)とは？わかりやすく解説