fulltext.study @t Gmail

Photocatalytic synthesis of silver dendrites using electrostatic hybrid films of porphyrin–polyoxometalate

Paper ID Volume ID Publish Year Pages File Format Full-Text
40623 45860 2012 11 PDF Available
Title
Photocatalytic synthesis of silver dendrites using electrostatic hybrid films of porphyrin–polyoxometalate
Abstract

Films based on electrostatic interactions between tetracationic porphyrin, 5,10,15,20-(4-trimethylammoniophenyl) porphyrin tetra(p-toluenesulfonate), [H2TPhN(Me)3P]4+ and Dawson type polyoxometalate α2-[Fe(P2W17O61)]7− (POM) are formed by the so called layer-by-layer self-assembly method. Successive deposition of layers has been monitored by UV–visible absorption spectroscopy. Atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) have been used to explore the morphology and composition, respectively. Electrochemistry and permeability studies have been carried out by cyclic voltammetry.The photocatalytic properties of these films have been also studied for the reduction of silver ions. Indeed, in these systems, porphyrins can be excited by visible light which play the role of photosensitizers able to give electrons to POM known to be good catalysts. Giant silver dendrites have been obtained.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (192 K)Download as PowerPoint slideHighlights► Porphyrin–polyoxometalate systems are formed by layer-by-layer method and are used for phototocatalysis. ► Photocatalytic reduction of Ag(I) (used as model system) is studied under visible illumination. ► Giant silver dendrites are obtained. ► The study entails aqueous heterogeneous catalysis where it is easy to recover catalyst.

Keywords
Porphyrin; Polyoxometalate; Photocatalysis; Dendrites; Nanoparticles; Silver; Layers-by-layers
First Page Preview
Photocatalytic synthesis of silver dendrites using electrostatic hybrid films of porphyrin–polyoxometalate
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 447–448, 7 December 2012, Pages 89–99
Authors
, , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us