文献类型：期刊文献

英文题名：Chitosan supported Pd-0 nanoparticles encaged in Al or Al-Fe pillared montmorillonite and their catalytic activities in Sonogashira coupling reactions

作者：Zhao, Jing[1];Zheng, Xiu[1];Liu, Qi[1];Xu, Mengdie[1];Yang, Shuai[1];Zeng, Minfeng[1]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Zhejiang Key Lab Alternt Technol Fine Chem Proc, Shaoxing 312000, Peoples R China

年份：2020

卷号：195

外文期刊名：APPLIED CLAY SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000552611500002)、、WOS

基金：The authors acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 11875193 and 11475114), and Zhejiang Provincial Fundamental Public Welfare Research Project of China (Grant No. LGG18E030004).

语种：英文

外文关键词：Chitosan; Palladium; Montmorillonite; Heterogeneous catalysis; Positron annihilation

外文摘要：In this study, the excellent chelating capability of chitosan (CS) and remarkable physical properties of Al or Al-Fe pillared montmorillonite (Mt) (i.e. high adsorption/diffusion capacity, thermal stability, and mechanical prop-erty, etc.) have been combined into a composite material to support Pd-0 nanoparticles catalysts. The BET surface area of the resultant Pd0@CS/Al-Mt and Pd-0@CS/Al-Fe-Mt were observed as 63.2 m(2).g(-1) and 109.7 m(2).g(-1), respectively. CS chains and Pd-0 nanoparticles (sized up to 3 nm) were well encaged in the interlayer spaces of the pillared Mt. The resultant catalysts showed high catalytic efficiency and excellent stability for Sonogashira coupling reactions of aryl iodides or bromides with terminal aryl alkynes. It was found that the comprehensive properties of Pd-0@CS/Al-Fe-Mt catalyst was higher than that of Pd-0@CS/Al-Mt catalyst, which was mainly attributed to the higher specific surface area and smaller-sized Pd-0 nanoparticles.