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Preparation of Superhighly Dispersed Co3O4@SBA-15 with Different Morphologies in Supercritical CO2 with the Assistance of Dilute Acids
Xu, Qin-Qin1; Xu, Gang1; Yin, Jian-Zhong1; Wang, Ai-Qin2; Ma, Yu-Ling1; Gao, Jin-Ji1
刊名INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
2014-06-25
DOI10.1021/ie501241f
53期:25页:10366-10371
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology
类目[WOS]Engineering, Chemical
研究领域[WOS]Engineering
关键词[WOS]SBA-15 ; COMBUSTION ; OXIDATION ; CATALYSTS ; SILICAS ; CO3O4
英文摘要In previous reports, organic solvents have usually been used as cosolvents in supercritical fluid applications. In this study, dilute acids were introduced into supercritical CO2 as cosolvents for the first time to improve the adsorption and dispersion of metal precursors on the substrate. Superhighly dispersed Co3O4 nanoparticles were confined in the nanochannels of SBA-15 after deposition and calcination when a small amount of nitric acid was added as the cosolvent. As the concentration of nitric acid increased, more individual small nanoparticles aggregated in adjacent nanochannels through the micropores in the walls of the substrates, which favored the formation of large nanoparticles. Furthermore, only Co3O4 nanoparticles were obtained when nitric acid was added to supercritical CO2-ethanol solution, whereas nanowires were found instead when hydrochloric acid was used. This indicates that H+ favors the adsorption and dispersion of precursors on the substrates and Cl- plays a key role in dictating the nanowire morphology.
语种英语
WOS记录号WOS:000338183800013
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/143216
专题中国科学院大连化学物理研究所
作者单位1.Dalian Univ Technol, State Key Lab Fine Chem, Sch Chem Machinery, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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Xu, Qin-Qin,Xu, Gang,Yin, Jian-Zhong,et al. Preparation of Superhighly Dispersed Co3O4@SBA-15 with Different Morphologies in Supercritical CO2 with the Assistance of Dilute Acids[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(25):10366-10371.
APA Xu, Qin-Qin,Xu, Gang,Yin, Jian-Zhong,Wang, Ai-Qin,Ma, Yu-Ling,&Gao, Jin-Ji.(2014).Preparation of Superhighly Dispersed Co3O4@SBA-15 with Different Morphologies in Supercritical CO2 with the Assistance of Dilute Acids.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(25),10366-10371.
MLA Xu, Qin-Qin,et al."Preparation of Superhighly Dispersed Co3O4@SBA-15 with Different Morphologies in Supercritical CO2 with the Assistance of Dilute Acids".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.25(2014):10366-10371.
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