Synthesis of BaSO4 Nanofibers Controlled by the Yield of Hydrated Electrons in AOT-Based Microemulsions

doi:10.3866/PKU.WHXB201404291

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	Synthesis of BaSO4 Nanofibers Controlled by the Yield of Hydrated Electrons in AOT-Based Microemulsions
	Xu Wen-Li; Chen Qing-De; Shen Xing-Hai
刊名	ACTA PHYSICO-CHIMICA SINICA
	2014-06-01
卷号	30 期号:6 页码:1194-1200
关键词	Baso4 Y-rradiation Hydrated Electron Reverse Microemulsion Nanofiber
ISSN号	1000-6818
DOI	10.3866/PKU.WHXB201404291
英文摘要	Single-crystal BaSO4 nanofibers and multi-architecture bundles were successfully synthesized in sodium bis(2-ethylhexyl) sulfosuccinate (AOT)-based microemulsions containing K2S2O8 and BaCl2, in which the controlled release of SO42- ions was realized in situ by the radiolytic reduction of S2O82- ions. The molar ratio of water to surfactant (omega values), the counterions of Ba2+, and the addition of aromatic compounds into the oil phase of the microemulsions were used to adjust the yield of hydrated electrons (e(aq)(-)). This allowed for controlling the reduction of S2O82- ions and the release of SO4 2-ions, leading to the shape manipulation of BaSO4 nanoparticle. With an increase in omega values or dose rate, the yield of e(aq)(-) increased, which led to a quicker release of SO42- ions, and this did not favor the formation of BaSO4 nanofibers. When BaCl2 was replaced with Ba(NO3)(2) the formation of nanofilaments became possible at a higher dose rate and a higher omega value, because NO3- effectively decreased the yield of e-aq and the rate of S2O82- ion reduction. When toluene was added into the oil phase of the microemulsions, the excess electrons were effectively scavenged in the oil phase, and the concentration of e-aq in the water pool decreased. This favored the formation of nanofibers at higher dose rates. These results showed that the mechanism about morphology control by the yield of e(aq)(-) was verified in the syntheses of BaSO4 nanoparticle.
语种	英语
出版者	PEKING UNIV PRESS
WOS记录号	WOS:000337251700025
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/50767]
专题	中国科学院化学研究所
通讯作者	Chen Qing-De
作者单位	Peking Univ, Coll Chem & Mol Engn, Fundamental Sci Radiochem & Radiat Chem Lab, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Xu Wen-Li,Chen Qing-De,Shen Xing-Hai. Synthesis of BaSO4 Nanofibers Controlled by the Yield of Hydrated Electrons in AOT-Based Microemulsions[J]. ACTA PHYSICO-CHIMICA SINICA,2014,30(6):1194-1200.
APA	Xu Wen-Li,Chen Qing-De,&Shen Xing-Hai.(2014).Synthesis of BaSO4 Nanofibers Controlled by the Yield of Hydrated Electrons in AOT-Based Microemulsions.ACTA PHYSICO-CHIMICA SINICA,30(6),1194-1200.
MLA	Xu Wen-Li,et al."Synthesis of BaSO4 Nanofibers Controlled by the Yield of Hydrated Electrons in AOT-Based Microemulsions".ACTA PHYSICO-CHIMICA SINICA 30.6(2014):1194-1200.