Preparation and characterization of cellulose/CdS nanocomposites

Nanocomposites of cadmium sulfide and microcrystalline cellulose(CdS/MCC)have been prepared from an aqueous solution of cadmium chloride and sodium sulfide by in-situ process using microcrystalline cellulose as substrate material.The influences of compounding conditions on the composition results were studied.The amount of the compounded cadmium sulfide particles depends on the composition conditions,such as Cd2+ concentration,Cd2+ absorbing time,and ultrasonic powers.It is indicated that the content of compounded cadmium sulfide particles can be improved by property increase Cd2+ absorbing time and ultrasonic powers.The influences of Cd2+ concentration is significant.The structure and the properties of the composite(MCC/CdS)obtained were investigated by means of X-ray diffraction(XRD),scanning electron microscope(SEM),fourier transformed infrared(FTIR)and photoluminescence(PL)spectrum.According to SEM images,the obtained CdS particles evenly distributed on the surface of microcrystalline cellulose.The PL spectrum of the CdS/MCC composite particles displayed peaks range from 510nm to 540nm with exited wavelength at 420nm.