Aliphatic amines modified CoO nanoparticles for catalytic oxidation of aromatic hydrocarbon with molecular oxygen

The surface modification of metal oxides using organic modifiers is a potential strategy for enhancing their catalytic performances.In this study,a hydrophobic surface amine-modified CoO catalyst with a water contact angle of 143°was fabricated.The catalyst was characterized by XRD,TGA,FT-IR,HR-TEM,and XPS.The results showed that the fabricated catalyst performed better than the hydrophilic commercial CoO nanoparticle in the process of aromatic hydrocarbon oxidation.After the amines modification,commercial CoO also became hydrophobic and improved conversion of ethylbenzene was achieved.The surface modification of CoO with amines induced the hydrophobicity property,which could serve as a reference for the design of other hydrophobic catalysts.

基于聚乙烯亚胺的非病毒基因载体研究进展

如今,越来越多的非病毒基因载体被应用于基因传递中,聚乙烯亚胺(PEI)作为一种重要的阳离子聚合非病毒基因传递载体受到广泛的关注。针对如何克服其生物不可降解性和细胞毒性并进一步提高转染效率的问题,笔者通过文献综合介绍了一些新的策略,并具体对以PEI为基础的新型载体的合成、新型体外转染方法的建立以及体内应用等方面的研究进展进行综述。