Decoration of Fe3O4 base material with Pd loaded CdS nanoparticle for superior photocatalytic efficiency

Sahoo, Ramkrishna ; Roy, Anindita ; Ray, Chaiti ; Mondal, Chanchal ; Negishi, Yuichi ; Yusuf, S. M. ; Pal, Anjali ; Pal, Tarasankar (2014) Decoration of Fe3O4 base material with Pd loaded CdS nanoparticle for superior photocatalytic efficiency The Journal of Physical Chemistry C, 118 (21). pp. 11485-11494. ISSN 1932-7447

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp503393x

Related URL: http://dx.doi.org/10.1021/jp503393x

Abstract

Decorated ternary Pd@CdS@Fe3O4 nanoarchitectures are synthesized by judicious loading of CdS nanoparticles without functionalizing the surface of the base materials, i.e., Fe3O4 and CdS. Here we have adopted a unique method to prepare Fe3O4 nanoparticles. In this ternary composite ferromagnetic Fe3O4 behaves as the catalyst carrier, CdS is used as semiconductor, and loaded Pd due to its high electron affinity behaves as a electron scavenger. CdS inherits visible light absorbing capability. Here Pd2+ is reduced to Pd upon deposition onto the CdS nanoparticles by the anionic S2–. Then the ternary composite exhibits pronounced photocatalytic activity toward Rhodamine B oxidation under visible light irradiation in the yellow region. This composite happens to be much more efficient than that of pure CdS and CdS@Fe3O4 composite. Metallic Pd, due to its high electron withdrawing property, uptakes the electrons from the conduction band of CdS and increases the oxidative power of CdS. Because of the presence of Fe3O4 in the composite, the catalyst shows ferromagnetism, and thus after the photocatalytic experiments the catalyst is easily isolated from the reaction mixture. The efficiency of the photocatalyst decreases after five cycles because of the disintegration of the particle. The ternary composite serves as a convenient and efficient photocatalyst for degradation of dye molecules leading to the purification of water.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:112019
Deposited On:01 Dec 2017 11:50
Last Modified:01 Dec 2017 11:50

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