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Single-source precursor approach for the preparation of CdS nanoparticles and their photocatalytic and intrinsic peroxidase like activity

Paper ID Volume ID Publish Year Pages File Format Full-Text
46552 46441 2012 10 PDF Available
Title
Single-source precursor approach for the preparation of CdS nanoparticles and their photocatalytic and intrinsic peroxidase like activity
Abstract

CdS nanoparticles (NPs) with different shapes and sizes (rods and spheres) have been synthesized through decomposition of a newly synthesized precursor complex [Cd(SOCPh)2Lut2] using structure-directing solvents such as ethylenediamine (EN), dimethylsulfoxide (DMSO) and ammonia (NH3). In addition, CdS NPs is also prepared by thermal decomposition of the precursor complex under N2 atmosphere. The precursor complex is characterized by elemental analyses, TGA, FTIR, UV–vis spectroscopy and single crystal X-ray diffraction. The distorted tetrahedron geometry of the precursor complex has been determined by X-ray diffraction, which crystallizes in monoclinic crystal system of P2(1)/n space group with a = 11.0487(17) Å, b = 16.396(3), c = 15.413(2) Å, α = 90.00°, β = 109.708(4)°, γ = 90.00° and Z = 4. The CdS NPs are characterized using powder X-ray diffraction, transmission electron microscopy, BET analyses, UV–vis absorption and photoluminescence spectroscopy. The photo-catalytic activity of CdS NPs is studied by the degradation of Rose Bengal (RB) dye, indicating an excellent photocatalytic activity compared to that of commercial TiO2. The mechanism behind photocatalytic degradation of RB in presence of CdS NPs is elucidated using terephthalic acid photoluminescence probing technique and evidence have shown that the photogenerated holes to be the predominant active species. This paper also demonstrates the intrinsic peroxidase like activity of CdS NPs toward peroxidase substrates 3,3′,5,5′-tetramethyl benzidine (TMB) and hydrogen peroxide. Kinetic analysis indicates that the catalysis by CdS NPs show typical Michaelis–Menten kinetics. Moreover, our synthesized CdS NPs show higher catalytic performances with a higher binding affinity for the substrate TMB than horseradish peroxidase (HRP) and other recently reported nano-mimitics.

Graphical abstractNanorods and nanospheres of CdS have been synthesized through decomposition of a precursor complex [Cd(SOCPh)2Lut2]. As prepared CdS NPs show excellent catalytic, photocatalytic properties. Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights▸ A novel precursor complex [Cd(SOCPh)2Lut2] with crystal structure. ▸ CdS NPs obtained by thermal and solvothermal decomposition of precursor complex. ▸ Superior photocatalytic activity toward the decomposition of Rose Bengal dye. ▸ Terephthalic acid photoluminescence probing technique to establish the degradation mechanism. ▸ Intrinsic peroxidase-like behavior.

Keywords
CdS nanoparticles; Single-source precursor; Crystal structure; Photocatalytic activity; Peroxidase-like behavior
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Single-source precursor approach for the preparation of CdS nanoparticles and their photocatalytic and intrinsic peroxidase like activity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 126, 25 September 2012, Pages 265–274
Authors
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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