NiO promoted CuO–NiO/SBA-15 composites as highly active catalysts for epoxidation of olefins. (1st September 2016)

• Record Type: Journal Article
• Authors: Tang, Yinhai; Gao, Hongyi; Yang, Mu; Wang, Ge; Li, Jie; Zhang, Huan; Tao, Zhang
• Is Part Of: New journal of chemistry. Volume 40:Number 10(2016:Oct.)
• Page Start: 8543
• Page End: 8548
• Publication Date: 2016-09-01
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj01654e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : NiO promoted dispersion of CuO in the CuO–NiO/SBA-15 composites, which showed high activity for olefin epoxidation. Abstract : In this paper, CuO–NiO supported on mesoporous silica SBA-15 was developed using the ultrasonic post-grafting method. The bi-metallic oxides were well-dispersed in very small sizes in the mesoporous channels, and the presence of NiO enhanced the surface content of CuO, leading to a redistribution of CuO and good dispersion of CuO nanoparticles, which were characterized by high-resolution transmission electron microscopy (HRTEM), XRD and N2 adsorption and desorption isotherm examination. Compared with the CuO/SBA-15 or NiO/SBA-15, the electron transfer that occurred between the two metal oxides and high dispersion of the active components improved the overall selective olefin oxidation.