Core-shell structured AP/Fe3O4 composite with enhanced catalytic thermal decomposition property: Fabrication and mechanism study. (16th January 2022)

• Record Type: Journal Article
• Authors: Cao, Shao-Bo; Zhou, Lin-Yu; Zhang, Cai; Zhang, Liang-Liang; Xiang, Guo-Lei; Wang, Jie-Xin; Chen, Jian-Feng
• Is Part Of: Chemical engineering science. Volume 247(2022)
• Publication Date: 2022-01-16
• Subjects: Ammonium perchlorate -- Nanodispersion -- Core-shell structure -- Catalytic thermal decomposition -- Heat transfer; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2021.116899
• Languages: English
• ISSNs: 0009-2509

Abstract

Highlights: A fabrication method for AP/nanocatalysts core-shell composites (CSC) was proposed. Nanodispersion technology is employed to avoid aggregation of nanocatalysts in CSC. The AP/nanocatalysts CSC possesses enhanced thermal decomposition property. Abstract: To address the aggregation problem of nanocatalysts in ammonium perchlorate (AP), AP/Fe3 O4 core-shell composites (CSC) were synthesized by nanodispersion-assisted antisolvent recrystallization induced self-assembly method. DFT and FTIR test results reveal that covalent bonds between citrate and Fe3 O4 along with hydrogen bonds between citrate and AP drive the formation of AP/Fe3 O4 CSC. With coating 5.4 wt% Fe3 O4, the high-temperature decomposition peak temperature of AP is decreased by 91.3 °C, the heat release is increased by 125% and the apparent activation energy is lowered by 47.9%. AP/Fe3 O4 CSC exhibit excellent thermal decomposition performance because the highly dispersed nanocatalysts on AP surface provide more catalytic sites and accelerate the reaction heat transferring from burning surface to condensed AP. Guided by this strategy, AP/Co3 O4 and AP/Fe2 O3 CSC were also prepared with enhanced thermal decomposition performance, which indicates this strategy has good applicability to improve the catalytic performance of nano metal oxides for AP decomposition.