Photocatalytic reduction of Ag2SO4 by the Dawson anion α-[P2W18O62]6- and tetracobalt sandwich complexes

被引：39

作者：

Costa-Coquelard, Claire ^{[1
]}

Schaming, Delphine ^{[1
]}

Lampre, Isabelle ^{[1
]}

Ruhlmann, Laurent ^{[1
]}

机构：

[1] Univ Paris 11, UMR CNRS 8000, Chim Phys Lab, Fac Sci Orsay, F-91405 Orsay, France

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2008年 / 84卷 / 3-4期

关键词：

Dawson; Polyoxometalates; Photocatalysis; Silver;

D O I：

10.1016/j.apcatb.2008.06.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photocatalytic behaviours of the Dawson salt alpha-K-6[P2W18O62] and two isomers of the tetracobalt Dawson-derived sandwich complexes, of alpha beta beta alpha-Na-17[Co-4(H2O)(OH)(P2W15O56)(2)]center dot 51H(2)O center dot 2NaCl and alpha alpha beta alpha- Na-16[Co-4(H2O)(2)(P2W15O56)(2)]center dot 51H(2)O (abbreviated beta beta-{Co4P4W30} and alpha beta-{Co4P4W30}, respectively), are described and compared. The direct photochemical excitation of the polyoxometalates (POM) in the presence of propan-2-ol as electron donor leads to their reduction. With polyoxometalates as photocatalyst and propan-2-ol as sacrificial electron donor, the reduction of (Ag2SO4)-S-1 from aqueous solutions is observed leading to metallic Ag-n(0) clusters and colloidal metal nanoparticles stabilized by POM. In the case of both {Co4P4W30}, TEM experiments reveal that most of the Ag-n particles obtained with a slight excess of Ag+ are spherical with a quite large distribution in size between 10 and 100 nm. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：835 / 842

页数：8

共 45 条

[31] Mixed-metal Dawson sandwich complexes:: Synthesis, spectroscopic characterization and electrochemical behaviour of Na16[MIICo3(H2O)2-(P2W15O56)2] (M = Mn, Co, Ni, Zn and Cd) [J].

Ruhlmann, Laurent ;

Costa-Coquelard, Claire ;

Canny, Jacqueline ;

Thouvenot, Rene .

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2007, (11) :1493-1500

[32]

TAUSCHTREML R, 1978, BER BUNSEN PHYS CHEM, V82, P1335, DOI 10.1002/bbpc.19780821213

[33] Reduction of Ag-1(I)(NH3)(2)(+) to Ag-1(0)(NH3)(2) in solution. Redox potential and spectral study [J].

Texier, I ;

Remita, S ;

Archirel, P ;

Mostafavi, M .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (30) :12472-12476

[34] Radiolytic reduction of Ag(CN)(2)(-) solution: Ligand effect on the redox potential [J].

Texier, I ;

Mostafavi, M .

RADIATION PHYSICS AND CHEMISTRY, 1997, 49 (04) :459-464

[35] VIBRATIONAL INVESTIGATIONS OF POLYOXOMETALATES .3. ISOMERISM IN MOLYBDENUM(VI) AND TUNGSTEN(VI) COMPOUNDS RELATED TO THE KEGGIN STRUCTURE [J].

THOUVENOT, R ;

FOURNIER, M ;

FRANCK, R ;

ROCCHICCIOLIDELTCHEFF, C .

INORGANIC CHEMISTRY, 1984, 23 (05) :598-605

[36] Selective photocatalytic reduction-recovery of palladium using polyoxometallates [J].

Troupis, A ;

Hiskia, A ;

Papaconstantinou, E .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 52 (01) :41-48

[37] Photocatalytic reduction - recovery of silver using polyoxometalates [J].

Troupis, A ;

Hiskia, A ;

Papaconstantinou, E .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 42 (03) :305-315

[38] Photocatalytic reduction and recovery of copper by polyoxometalates [J].

Troupis, A ;

Hiskia, A ;

Papaconstantinou, E .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (24) :5355-5362

[39]

Troupis A, 2002, ANGEW CHEM INT EDIT, V41, P1911, DOI 10.1002/1521-3773(20020603)41:11<1911::AID-ANIE1911>3.0.CO

[40]

2-0

← 1 2 3 4 5 →