NER: Fabrication of TIO2 Nanoparticles and Films for Environmental Applications Using Ionic Liquid-Based Self Assessing Sol-Gel Methods

提案编号：研究机构：辛辛那提大学主校区提案标题：NER：使用基于离子液体的自评估溶胶-凝胶方法制造用于环境应用的TiO 2纳米颗粒和薄膜摘要该提案是响应纳米尺度科学和工程倡议，NSF 02 - 148，类别NER而收到的。 该提案旨在研究一种创新的方法来制备纳米结构的TiO2光催化粉末和固定化膜，其具有增强的表面积，定制设计的孔结构和增加的催化剂活性。该方法涉及采用新一代"绿色"设计溶剂（称为室温离子液体（RTIL））的替代溶胶-凝胶过程。该方法还将包括使用RTIL为基础的溶胶-凝胶方法和自组装模板的组合，用于控制纳米粒子和film.Both的孔特性的纳米粒子和固定化膜将使用国家的最先进的仪器进行表征，并将评估其光催化活性。 该提案的智力价值在于其使用新一代绿色溶剂来设计先进材料的特性的高度新颖性。PI将探索离子液体结构对这些反应的作用，以及这些性质如何影响最终层膜的尺寸和孔隙率。该研究将检查在最终膜的煅烧和结晶过程中工艺条件（溶剂去除、热处理）的影响。方案新颖，风险大。然而，基于这些WIRTIL（水不混溶性室温离子液体）的已知特性和对制备TiO 2光催化剂的溶胶-凝胶/热处理程序的深入理解，该项目的成功有足够的理由。 将介绍材料加工的新概念。如果该项目获得成功，它将成为使用溶胶-凝胶方法加工先进材料的先驱，并将"跨越式"应用于纳米技术、材料加工和环境应用中的一类新的绿色溶剂。这种想法可以应用于合成其他类型的氧化物和氧化物-氧化物或金属-氧化物复合物的粉末或固定膜。 预计这项研究将推动离子液体在其他先进纳米多孔材料加工中的应用。潜在的市场将包括化学、制药和环境工业（催化、化学合成、电化学、分离、氧化）。 社会影响可能很大，因为它将为制造具有新特性的纳米材料创造新的合成路线，并将扩大一类新的环境友好溶剂的应用。 该项目还将包括一个强大的教育部分，它将整合材料科学，化学，化学工程和环境工程的先进纳米材料加工的创新概念。所有这些学科的学生将有机会参与新课程，涉及绿色化学和绿色工程在化学合成和环境纳米技术中的应用。

PROPOSAL NUMBER: 0304171PRINCIPAL INVESTIGATOR: Dionysiou, Dionysios D.INSTITUTION: University of Cincinnati Main CampusPROPOSAL TITLE: NER: Fabrication of TIO2 Nanoparticles and Films for Environmental Applications Using Ionic Liquid-Based Self Assessing Sol-Gel MethodsAbstractThis proposal was received in response to Nanoscale Science and Engineering initiative, NSF 02-148, category NER. This proposal aims at investigating an innovative method to prepare nanostructured TiO2 photocatalytic powders and immobilized films with enhanced surface area, tailor-designed pore structure, and increased catalyst activity. The method concerns an alternative sol-gel procedure that employs a New Generation of "Green" Designer Solvents, known as Room Temperature Ionic Liquids (RTILs). The method will also include the use a combination of RTIL-based sol-gel methods and self-assembling templates for controlling the pore characteristics of the nanoparticles and films.Both nanoparticles and immobilized films will be characterized using state-of-the-art instrumentation and will be evaluated for their photocatalytic activity. The intellectual merit of the proposal is its high novelty of using a new generation of green solvents to engineer the properties of advanced materials. The PI will explore the role of ionic liquid structure on these reactions and how such properties affect the size and porosity of the final layer film. The study will examine the influence of process conditions (solvent removal, heat treatment) during the calcination and crystallization of the final film. The proposal is novel and has high risk. However, based on known properties of some of these WIRTILs (water immiscible room temperature ionic liquids) and the deep understanding of the sol-gel/heat treatment procedures for the preparation of TiO2 photocatalyst, there is adequate rationale for the success of this project. New concepts in material processing will be introduced. If such project proves successful, it will pioneer the processing of advanced materials using sol-gel methods and will "leap-frog" the application of a new class of Green Solvents in Nanotechnology, materials processing, and environmental applications.The broader impacts of this proposal are tremendous. This idea can be applied for the synthesis of other types of oxides and oxide-oxide or metal-oxide composites in powder or as immobilized films. It is expected that this study will propel the use of ionic liquids in the processing of other advanced nanoporous materials. Potential markets will include chemical, pharmaceutical, and environmental industries (catalysis, chemical synthesis, electrochemistry, separations, oxidation). The societal impact can be high since it will create new synthetic routes for the manufacture of nanomaterials with novel properties and will extent the application of a new class of environmentally friendly solvents. The project will also include a strong educational component, which will integrate innovative concepts in materials science, chemistry, chemical engineering, and environmental engineering for the processing of advanced nanomaterials.Students in all these disciplines will have the opportunity to get involved in new courses dealing with the application of Green Chemistry and Green Engineering in chemical synthesis and Environmental Nanotechnology.