Reactions of hydrophobic organic nanoparticle mixtures in water: nanoparticle-on-nanoparticle oxidative dye bleaching
Reactions of hydrophobic organic nanoparticle mixtures in water: nanoparticle-on-nanoparticle oxidative dye bleaching
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DOI：
10.1039/c3gc40573g
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发表时间：
2013-01-01
期刊：
影响因子：
9.8
通讯作者：
Rannard, Steve P.
中科院分区：
文献类型：
--
作者：
Giardiello, Marco;McDonald, Tom O.;Rannard, Steve P.
在水中，疏水染料和氧化剂的混合有机纳米悬浮液之间的氧化漂白被证明比在相同温度下进行的均相有机溶剂反应更快。采用纳米沉淀法制备了油红O和邻苯二甲酰亚胺过氧基己酸的纳米悬浮液，并在不同温度下进行了反应。在50摄氏度下，纳米悬浮液中的漂白大约只需30分钟；比在丙酮或水中的混合有机粉末中的对比反应快得多(>；48小时)。动力学分析表明，反应速率和修正的速率常数显著增加，表观活化能降低7倍。
The oxidative bleaching between mixed organic nanosuspensions of hydrophobic dyes and oxidising agents has been demonstrated to be faster in water than homogeneous organic solvent reactions conducted at the same temperature. Aqueous nanosuspensions of both Oil Red O and epsilon-phthalimidoperoxy-hexanoic acid were generated using a nanoprecipitation technique and reacted at various temperatures. At 50 degrees C, bleaching within the nanosuspension was achieved in approximately 30 minutes; considerably faster than the comparative reaction in acetone or the mixed organic powders in water (>48 hours). Kinetic analyses show dramatic increases in reaction rates and modified rate constants and a 7-fold decrease in apparent activation energy.