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论文类型： 期刊论文

发表时间： 2019-10-01

发表刊物： MATERIALS LETTERS

收录刊物： SCIE、EI

卷号： 252

页面范围： 31-34

ISSN号： 0167-577X

关键字： Nanoparticles; Porous materials; Fibrous silica coating; Prussian blue analogs; Nanostructure

摘要： A series of fibrous silica core-shell nanoparticles (NPs) were fabricated by using Prussian blue analogs (PBAs) as hard templates in a bicontinuous microemulsion system. Other than normal synthesis of fibrous silica, KOH was used instead of urea in the fabrication which was operated at lower temperature 40 degrees C without any cosolvent. Synthesized PBA@fibrous silica NPs could be easily oxidized to Co-Fe oxides@fibrous silica nanostructures. Furthermore, after acid etching process, corresponding hollow cubic silica nanoframes (HCSNF) with a fibrous morphology were finally achieved. Characterization results revealed that the size distribution of HCSNFs was 300 +/- 46 nm. Each HCSNF had a novel hollow region. This low-temperature cosolvent-free fabrication provides a new idea for expanding efficient synthetic methods and morphology of fibrous silica shell. (C) 2019 Elsevier B.V. All rights reserved.