TEMPO氧化纤维素/CdS纳米复合材料的制备与表征

摘要

TEMPO cellulose/CdS nanocomposite materials were prepared by in situ synthesis of TEMPO oxidized bleached eucalyptus pulp and cotton pulp with the precursor solutions CdCl2 and Na2S. The obtained nanocomposite materials were characterized by atomic absorption spectrometry (AAS) , scanning electron microscopy (SEM) , X-ray diffraction (XRD) and atomic force microscopy (AFM). The results showed that both of the oxidized eucalyptus fiber and cotton fiber had large amounts of Cd2 + attachment, and the CdS nanoparticles were cubic crystal. The diameters of CdS nanoparticles attached onto the TEMPO oxidized eucalyptus fiber were 50 ～ 100 nm, while that of TEMPO oxidized cotton fiber were about 50 nm. Compared with the oxidized eucalyptus fiber, the CdS nanoparticles attached onto the oxidized cotton fiber showed smaller size and distributed more uniformly. This research has a significant guiding role to the preparation of cellulose/inorganic nanocomposites based on plant cellulose resources.%分别对桉木浆纤维和棉浆纤维进行TEMPO(2,2,6,6-四甲基哌啶-1-氧化物自由基)氧化,并采用原位复合法,将TEMPO氧化后的桉木浆纤维和棉浆纤维与前躯体溶液CdCl2和Na2S进行反应,制备了TEMPO氧化纤维素/CdS纳米复合材料.利用原子吸收光谱(AAS)、扫描电镜(SEM)、X射线衍射仪(XRD)和原子力显微镜(AFM)对纳米复合材料进行表征.结果表明,TEMPO氧化后的桉木浆纤维和棉浆纤维复合的Cd2+含量均较高,复合的CdS颗粒为立方晶型；TEMPO氧化桉木浆纤维上复合的CdS颗粒粒径为50～100 nm,TEMPO氧化棉浆纤维上复合的CdS颗粒粒径为50 nm左右.与TEMPO氧化桉木浆纤维相比,TEMPO氧化棉浆纤维上复合的CdS晶粒尺寸更小、分布更均一.