Fabrication of Microcrystalline Cellulose/CdS Nanocomposites and their Photocatalytic Properties

Abstract:

Microcrystalline cellulose (MCC)/cadmium sulfide (CdS) nanocomposites were prepared by using ultrasound wave irradiation. The as-prepared samples were characterized using scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS), atomic absorption spectrometry (AAS), transmission electron microscopy (TEM). The photocatalytic behavior of MCC/CdS nanocomposites was evaluated using the degradation of a methyl orange (MeO) aqueous solution under ultraviolet (UV) light irradiation. Results showed that CdS nanoparticles were evenly distributed on the surface of MCC with little aggregation; the amount of Cd attached to the MCC was 23.75 % (w/w, Cd/composites). The MeO degradation rate was much higher when the MCC/CdS nanocomposites were irradiated with UV light than when CdS powder alone was irradiated. In dark conditions, the MCC/CdS nanocomposites showed almost no photocatalytic activity. In addition, the amount of MCC/CdS nanocomposites added to MeO solution and the initial pH of the MeO solution were also important factors influencing the photocatalytic activity. The results show that MCC/CdS nanocomposites are promising materials with excellent performance in photocatalytic applications.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 2475-2480
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.2475
• Online since: January 2013
• Authors: Ai Min Tang, Ting Ting Hu, Xia Su
• Keywords: Degradation, Microcrystalline Cellulose (MCC), Nanocomposite, Photocatalytic

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