论文部分内容阅读
以NaClO2为主要氧化剂,使用氧化漂白桉木浆制备C-6位羧基含量为0.8mmol/g的TEMPO氧化纤维素,然后将其剪切为纳米纤维素(NCC)。再以NCC为基材,以无水氯化镉及硫化钠为前驱体,用声化学法制备了NCC/CdS纳米复合光电材料。用X射线衍射(XRD)、场发射扫描电镜(SEM)、傅里叶红外光谱仪(FT-IR)以及光电化学实验对复合材料的结构及性能进行表征。结果表明,大量CdS纳米粒子复合在NCC基材上形成NCC/CdS纳米复合材料,CdS晶粒为立方型晶体,大小为7.3nm。用NCC/CdS纳米复合材料形成的薄膜器件在可见光区域的透光率高达60%。这种复合材料可产生1.35μA的光电流,其光电转换效率为微晶纤维素/CdS复合材料的6倍。
TEMPO oxidized cellulose having a C-6 carboxyl group content of 0.8 mmol / g was prepared using oxidized bleached eucalyptus pulp with NaClO 2 as the main oxidant, and then sheared into nanocellulose (NCC). NCC / CdS nanocomposite materials were prepared by sonochemistry using NCC as substrate and anhydrous cadmium chloride and sodium sulfide as precursors. The structure and properties of the composites were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and photoelectrochemical experiments. The results show that a large number of CdS nanoparticles composite NCC / CdS nanocomposites formed on the NCC substrate, the CdS crystal grains are cubic crystals, the size of 7.3nm. Thin film devices formed with NCC / CdS nanocomposites transmit light up to 60% in the visible region. This composite can produce a photocurrent of 1.35μA, its photoelectric conversion efficiency of microcrystalline cellulose / CdS composite 6 times.