GOALI: Controlled Pore Size/Thickness Ultrathin Microporous/Mesoporous Films on Particles

目标：控制孔径/厚度的颗粒上超薄微孔/介孔薄膜

• 批准号: 1067800
• 负责人: Alan Weimer
• 金额: $ 30.06万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-03-15 至 2017-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1067800&HistoricalAwards=false
• 关键词: GOALI; Controlled; Pore; Size; Thickness

1067800PI: WeimerThere is a need and opportunity to develop controlled pore diameter/porosity/thickness ultra-thin microporous/mesoporous films on particles. Applications include corrosion protective coatings, gas storage, and catalyst encapsulation for controlling reaction selectivity and for reducing sintering, thus maintaining catalytic activity. Successful completion of this research will result in a better understanding of the fabrication of porous oxide films with controllable thickness and pore size and the design of catalysts that are more resistant to sintering and have higher selectivity. The pore size of the films can be controlled by selection of the organic component in the molecular layer deposited (MLD) hybrid polymer films and the method for removing the organic component, forming pores in the MLD films. Variables to be investigated for the formation of porous films include the effect of MLD precursor chemistry, MLD reaction temperatures, and methods for the formation of porous structures. Because the oxide layers are so thin (1-5 nm), they are not expected to significantly decrease the rate of the desired reaction. Thus, the specific goal is to increase selectivity and lifetime with essentially no loss in rate of the desired reactions. The catalytic properties of supported catalysts could then be designed by selecting the oxide layer thickness, the size of the oxide pores, and the composition of the oxide. The catalysts will be evaluated using oxidation reactions. ALD NanoSolutions, Inc. will provide access to and support for students using a quartz crystal microbalance (QCM) to investigate new MLD chemistries. Additionally, baseline supported Pt/silica gel catalyst to be used for the film and reaction studies will be provided by ALD NanoSolutions, Inc. Broader Significance and Importance: The ability to prepare highly porous oxide films with controllable thickness and pore size would make generational gains in the preparation of thermally stable catalyst nanoparticles. Since sintering and poisoning are two of the main deactivation mechanisms for catalysts, decreasing the rates of these processes would decrease the amount of precious metals required in catalysts, increase lifetimes and ultimately improve the economics of many processes. The proposed approach has great potential for application in a large number of catalytic processes. Other significant areas for application include controlling the selectivity of membrane separations for sensors and filtration devices, providing a high surface area moiety for functionalization for H2 gas storage or the attachment of active agents for drug delivery, among others. The broader educational application of this proposed research plan is the contribution that is anticipated through the dissemination of results to the particle technology and catalysis communities. This research is not only an excellent vehicle for training a Ph.D. students on an industrially significant project, but is an excellent opportunity to impact undergraduate students and peripheral K-12 outreach. Both graduate and undergraduate students will have opportunities to present their research results at national meetings. From a commercial perspective, ALD NanoSolutions, Inc. has agreed to test market the optimized stabilized Pt catalyst with their potential customers.

1067800 PI：Weimer有一个需要和机会，开发控制孔径/孔隙率/厚度超薄微孔/介孔膜的颗粒。 应用包括防腐蚀涂层、气体储存和催化剂封装，用于控制反应选择性和减少烧结，从而保持催化活性。 这项研究的成功完成将导致更好地理解多孔氧化物膜的制造与可控的厚度和孔径和催化剂的设计，更耐烧结，具有更高的选择性。膜的孔径可以通过选择分子层沉积（MLD）混合聚合物膜中的有机组分和用于去除有机组分的方法来控制，从而在MLD膜中形成孔。要研究的多孔膜的形成的变量包括MLD前体化学的影响，MLD反应温度，和多孔结构的形成方法。由于氧化物层非常薄（1-5 nm），因此预计它们不会显著降低所需反应的速率。因此，具体目标是增加选择性和寿命，而基本上不损失所需反应的速率。然后，可以通过选择氧化物层厚度、氧化物孔的尺寸和氧化物的组成来设计负载型催化剂的催化性能。将使用氧化反应评价催化剂。 ALD NanoSolutions，Inc.将为学生提供使用石英晶体微量天平（QCM）研究新MLD化学的机会和支持。 此外，用于膜和反应研究的基线负载型Pt/硅胶催化剂将由ALD NanoSolutions，Inc.提供。更广泛的意义和重要性：制备具有可控厚度和孔径的高度多孔氧化物膜的能力将在制备热稳定催化剂纳米颗粒方面取得一代人的收益。由于烧结和中毒是催化剂的两种主要失活机制，降低这些过程的速率将减少催化剂中所需的贵金属量，增加寿命并最终提高许多过程的经济性。所提出的方法在大量的催化过程中具有很大的应用潜力。其他重要的应用领域包括控制传感器和过滤装置的膜分离的选择性，提供用于H2气体储存的功能化的高表面积部分或用于药物递送的活性剂的附着等。这一拟议的研究计划的更广泛的教育应用是通过向粒子技术和催化社区传播结果预期的贡献。这项研究不仅是培养博士的极好工具。学生在工业上的重要项目，但也是一个很好的机会，影响本科生和周边K-12推广。研究生和本科生都将有机会在全国会议上展示他们的研究成果。 从商业角度来看，ALD NanoSolutions，Inc.已同意测试市场的优化稳定的铂催化剂与他们的潜在客户。