A Single‐Source Precursor Route toward Small‐Sized Nickel Particles Embedded into SiO2 Sheet as Magnetic Separable Catalyst. Issue 37 (7th October 2020)

• Record Type: Journal Article
• Authors: Xue, Mei; Ma, Ruyun; Zhou, Xiaoguang; Tian, Chungui
• Is Part Of: ChemistrySelect. Volume 5:Issue 37(2020)
• Page Start: 11708
• Page End: 11712
• Publication Date: 2020-10-07
• Subjects: SiO2 protection -- aromatic nitro reduction -- magnetic separation -- precursor route -- small-sized Nickel particles; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202001868
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: A single‐source precursor route is presented to prepare small‐sized Ni particles (∼5 nm) uniformly embedded into SiO2 sheet (Ni/SiO2 ). The synthetic process involved the coordination of APTES (3‐aminopropyltriethoxysilane) with Ni 2+ to form Ni−Si precursor in high yield, followed by pyrolysis under NH3 atmosphere. During the heating, the Si component in the Ni−Si precursor was transformed into SiO2, which could restrict the in‐situ generated Ni from aggregation, resulting in the formation of the small‐sized Ni particles. Small size is conducive to promoting the catalytic performance, and meanwhile SiO2 protection plays a vital role in improving stability. During aromatic nitro reduction, Ni/SiO2 shows excellent catalytic performance, which can be separated conveniently by an external magnet after use. The route is indicative of designing other catalysts protected by SiO2 due to the versatile coordination ability of APTES with other metal ions (Fe, Co, Cu, etc). Abstract : A new method is presented toward the preparation of small‐sized Ni nanoparticles uniformly embedded in SiO2 sheet (Ni/SiO2 ) by the pyrolysis of a Ni−Si precursor, which is obtained in large mass by coordination of 3‐aminopropyltriethoxysilane (APTES) and Ni salts. The Ni/SiO2 can be a useful catalyst for the aromatic nitro reduction with easy separation ability by external magnet. The route can be used to design other metal‐based catalyst protected by SiO2 .