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

建议编号：0304171计划调查员：狄奥尼修，狄奥尼修斯D.研究：辛辛那提大学主校区问题标题：NER：使用离子液体自评估Sol-Gel方法制造环境应用的二氧化钛纳米颗粒和薄膜摘要本建议是对NSF 02-148纳米级科学与工程倡议的响应，NER类。该建议旨在探索一种创新的方法来制备纳米TiO2光催化粉末和固定化薄膜，具有更大的比表面积、量身定制的孔结构和更高的催化剂活性。该方法涉及一种替代的溶胶凝胶法，它使用了新一代“绿色”设计的溶剂，称为室温离子液体(RTILs)。该方法还将结合使用基于RTIL的溶胶凝胶法和自组装模板来控制纳米颗粒和薄膜的孔特征。纳米颗粒和固定化薄膜都将使用最先进的仪器进行表征，并将对其光催化活性进行评估。该提议的智力价值在于其高度新颖性，使用新一代绿色溶剂来设计先进材料的性能。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薄膜的大小和孔隙率。这项研究将考察在最终薄膜的焙烧和结晶过程中工艺条件(溶剂去除、热处理)的影响。这项提议新颖，风险很高。然而，基于其中一些WIRTIL(不溶于水的室温离子液体)的已知性质，以及对制备TiO2光催化剂的溶胶-凝胶/热处理过程的深入了解，该项目有足够的理由取得成功。将介绍材料加工方面的新概念。如果该项目成功，它将开创用溶胶凝胶法加工先进材料的先河，并将使一类新型绿色溶剂在纳米技术、材料加工和环境应用中的应用“飞跃”。这一提议的广泛影响是巨大的。这一思想也可用于合成其他类型的氧化物和氧化物-氧化物或金属-氧化物复合粉末或作为固定化薄膜。这项研究有望推动离子液体在其他先进纳米孔材料加工中的应用。潜在市场将包括化工、制药和环境行业(催化、化学合成、电化学、分离、氧化)。它的社会影响可能很大，因为它将为制造具有新性质的纳米材料开辟新的合成路线，并将扩大一类新的环境友好型溶剂的应用。该项目还将包括一个强有力的教育部分，它将整合材料科学、化学、化学工程和环境工程的创新概念，以处理先进的纳米材料。所有这些学科的学生都将有机会参与有关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的新课程。

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.