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Issue 66, 2014
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CdS nanoparticles anchored on the surface of yeast via a hydrothermal processes for environmental applications

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Abstract

Cadmium sulfide (CdS) nanoparticles were successfully anchored on the surface of yeast via a hydrothermal process, forming fructus rubi-like CdS@yeast hybrid microspheres. In this method, the innate functional groups inherited from the hydrophilic cell wall of microbial cells were utilized to anchor the Cd2+ ion, and then the CdS@yeast hybrid particles with fructus rubi-like morphology were obtained in the presence of thioacetamide (TAA) by a hydrothermal treatment process. The products were characterized by scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), powder X-ray diffraction (XRD) and UV-Vis diffuse reflectance spectra. The sedimentation performance of CdS@yeast microspheres in aqueous solutions was evaluated to demonstrate the unique features of CdS@yeast in comparison with bulk CdS nanoparticles. The interaction between host core yeast and guests CdS nanoparticles was investigated by Fourier transform infrared (FT-IR) spectroscopy and the possible mechanisms for the formation of CdS@yeast hybrid microspheres were proposed. The model photocatalytic test showed that the fructus rubi-like CdS@yeast microsphere could efficiently remove methylene blue (MB) dyes from aqueous solutions due to the combined functions from the bio-sorption of the yeast core and photocatalytic degradation driven by the attached CdS nanoparticles. The present approach represents a guide for the preparation of a variety of hybrid composites with similar structure for treatment of toxic organic pollutants.

Graphical abstract: CdS nanoparticles anchored on the surface of yeast via a hydrothermal processes for environmental applications

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Publication details

The article was received on 12 Apr 2014, accepted on 19 Jun 2014 and first published on 19 Jun 2014


Article type: Paper
DOI: 10.1039/C4RA03033H
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Citation: RSC Adv., 2014,4, 34864-34872
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    CdS nanoparticles anchored on the surface of yeast via a hydrothermal processes for environmental applications

    F. Qin, B. Bai, D. Jing, L. Chen, R. Song and Y. Suo, RSC Adv., 2014, 4, 34864
    DOI: 10.1039/C4RA03033H

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