物理化学学报Issue(6)：1194-1200,7.DOI:10.3866/PKU.WHXB201404291
AOT微乳液中通过水化电子产额调控合成BaSO4纳米纤维
Synthesis of BaSO4 Nanofibers Controlled by the Yield of Hydrated Electrons in AOT-Based Microemulsions
摘要
Abstract
Single-crystal BaSO4 nanofibers and multi-architecture bundles were successful y synthesized in sodium bis(2-ethylhexyl) sulfosuccinate (AOT)-based microemulsions containing K2S2O8 and BaCl2, in which the control ed release of SO24-ions was realized in situ by the radiolytic reduction of S2O28-ions. The molar ratio of water to surfactant (ωvalues), 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 al owed for control ing the reduction of S2O28- ions and the release of SO24- ions, leading to the shape manipulation of BaSO4 nanoparticle. With an increase inωvalues or dose rate, the yield of e-aq increased, which led to a quicker release of SO24-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 higherωvalue, because NO3-effectively decreased the yield of e-aq and the rate of S2O28-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.关键词
BaSO4/γ-辐照/水化电子/反相微乳液/纳米纤维Key words
BaSO4/γ-Irradiation/Hydrated electron/Reverse microemulsion/Nanofiber分类
化学化工引用本文复制引用
徐文丽,陈庆德,沈兴海..AOT微乳液中通过水化电子产额调控合成BaSO4纳米纤维[J].物理化学学报,2014,(6):1194-1200,7.基金项目
The project was supported by the National Natural Science Foundation of China (91226112), Specialized Research Fund for the Doctoral Program of Higher Education of China (20110001120121), and Coordinated Research Projects of International Atomic Energy Agency (CRP Research Contract No.15107).国家自然科学基金(91226112),高等学校博士学科点专项科研基金(20110001120121)及国际原子能机构((CRP Research Contract No.15107)资助项目 （91226112）
