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| Synthesis and Characterization of Nano-crystalline Cellulose/CdS Opto-electric Nano-composites |
| TANG Aimin** YAO Bangtao XU Liqun WU Haolin |
| (State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640) |
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Cite this article:
TANG Aimin, YAO Bangtao, XU Liqun, WU Haolin. Synthesis and Characterization of Nano-crystalline Cellulose/CdS Opto-electric Nano-composites. Chinese Journal of Materials Research, 2013, 27(2): 178-182.
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Abstract Oxidized celluloses with carboxylate content of 0.8mmol/g on C-6 position were prepared by oxidizing the bleached eucalyptus pulp with 2, 2, 6, 6-tetramethylpiperidinyl-1-oxyl (TEMPO) and NaClO in water at 60 ℃ and pH 6.8, with NaClO2 as the primary oxidant and then sheared into nano-crystalline cellulose (NCC) via ultra-high pressure homogenizer. Using cadmium chloride and sodium sulfide as precursors and NCC as substrate material, NCC/CdS opto-electrical nano-composites were successfully synthesized by a sonochemical method. The structure and properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transformed infrared (FT-IR) and photoelectric experiments. Results show that a lot of nano-CdS particles are evenly compounded with the NCC and its crystal size is about 7.3nm according to XRD. A film with high transmittance of more than 60% in visible light region was prepared from the NCC/CdS nano-composites. The photocurrent of NCC/CdS nano-composites is 13.5 μA, which is 6 times of the microcrystalline cellulose (MCC)/ CdS nano-composites.
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