Nonaqueous Sol-Gel and Colloid Chemistry of Microporous Manganese Oxides

微孔氧化锰的非水溶胶-凝胶和胶体化学

• 批准号: 0209688
• 负责人: Stanton S.H.Y. Ching
• 金额: $ 12.9万
• 依托单位: Connecticut College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0209688&HistoricalAwards=false
• 关键词: Nonaqueous; Sol; Gel; Colloid; Chemistry

The Advanced Materials Program in the Chemistry Division makes this award to Connecticut College to develop non-aqueous routes for the synthesis of microporous manganese oxides with layered and tunneled structures using sol-gel and colloid precursors. With this award, Professor Ching will prepare manganese oxide thin films and aerogels using non-aqueous sol-gel reactions between tetraalkylammonium permanganates and methanol. High surface area aerogels will be prepared without the solvent exchange steps needed with aqueous gels. In addition, these layered and tunneled materials will accommodate a wide range of interstitial cations. The growth of manganese oxide particles in colloidal and sol-gel environments will be studied in terms of their size distribution using dynamic light scattering under a number of reaction conditions such as time, temperature, concentration, reactant ratio, and mechanical agitation. These studies in concert with other proposed characterization techniques will be used to establish procedures to prepare manganese oxides with predetermined properties such as crystallinity, particle size, and morphology. Manganese oxide thin films and aerogels that will be prepared in this study are expected to have high surface area, and will accommodate a wide range of interstitial cations for potential applications in catalysis and lithium ion rechargeable batteries. The proposed studies, in addition, will provide undergraduate students with comprehensive hands-on experience in research, and the project has the potential to attract more students to careers in science.

化学部的先进材料计划将此奖项授予康涅狄格学院，以开发使用溶胶-凝胶和胶体前体合成具有层状和隧道结构的微孔锰氧化物的非水路线。 程教授将利用四烷基铵高锰酸盐和甲醇之间的非水溶胶-凝胶反应制备氧化锰薄膜和气凝胶。 高表面积气凝胶将在没有水性凝胶所需的溶剂交换步骤的情况下制备。此外，这些层状和隧道材料将容纳广泛的间隙阳离子。 在胶体和溶胶-凝胶环境中的氧化锰颗粒的生长将研究其尺寸分布，使用动态光散射下的一些反应条件，如时间，温度，浓度，反应物的比例，和机械搅拌。 这些研究与其他拟议的表征技术将被用来建立程序，以准备锰氧化物与预定的性能，如结晶度，粒度和形态。在本研究中制备的氧化锰薄膜和气凝胶预计具有高表面积，并将容纳广泛的间隙阳离子，用于催化和锂离子可充电电池中的潜在应用。 此外，拟议的研究将为本科生提供全面的实践研究经验，该项目有可能吸引更多的学生从事科学职业。