Developing a New Generation of Perovskite Oxides Based Composite Materials for CO2 Conversion into Fuels

开发新一代钙钛矿氧化物基复合材料用于将二氧化碳转化为燃料

• 批准号: 1206562
• 负责人: Alexander Orlov
• 金额: $ 36.82万
• 依托单位: SUNY at Stony Brook
• 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: 2012-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1206562&HistoricalAwards=false
• 关键词: Developing; New; Generation; Perovskite; Oxides

NON-TECHNICAL DESCRIPTION: The efficient conversion of carbon dioxide into fuels has an enormous potential to address both greenhouse emission issues and sustainable energy challenges. Significant challenges exist in producing materials, which can facilitate this conversion by utilizing solar energy, especially the visible part of the solar spectrum. A limited number of known materials exhibit very low quantum efficiency for carbon dioxide conversions, while being activated only by ultraviolet (UV) light. If successful, this project can significantly impact energy and environmental areas by using green routes for producing valuable chemicals. It will reduce carbon dioxide emissions by utilizing sustainable sources of energy, such as sunlight.TECHNICAL DETAILS: The major obstacle to progress in this scientific area is a lack of understanding of the relationship between synthetic method, micro- and nano-architecture and nanostructure, and the resulting physico-chemical and reactivity properties. Achieving this understanding and developing entirely new fabrication methods, applicable on an industrial scale, are major challenges that must be met before these new functional properties can find actual practical application. Accomplishing these two objectives, one scientific and the other technical, would correspond to a major breakthrough that would make possible a whole range of new applications. This project focuses on synthesis of perovskite-based nanostructured films and powders modified at the nanoscopic level by a variety of techniques that allow chemical doping, control of crystal structure, defect concentration and imposition of unusual new morphologies. This research undertakes an entirely new direction for achieving photocatalytic conversion of carbon dioxide into valuable chemical products. This project aims at exploring several strategies to establish a link between reactivity and physicochemical properties of these materials through both bulk and surface sensitive characterization techniques. This project also seeks a better understanding of the role of dopants in carbon dioxide interfacial reactions when the dopants are introduced in the correct oxidation state, concentrations and location where they can lead to significant increase in catalytic activity. An unusual part of this research is the utilization of doped nanostructured films, where both particle size and composition can be precisely controlled by a new nanofabrication method. Additionally, this project aims at exploring morphological control of perovskite oxides to increase their surface area and light trapping capabilities. Finally this project expands the teaching curriculum and research opportunities at both the graduate and undergraduate levels with significant inclusion of underrepresented students.

非技术描述：将二氧化碳转化为燃料的有效转化具有解决温室排放问题和可持续能源挑战的巨大潜力。生产材料中存在重大挑战，可以通过利用太阳能，尤其是太阳能光谱的可见部分来促进这种转换。有限数量的已知材料对二氧化碳转化的量子效率非常低，而仅被紫外线（UV）光激活。如果成功，该项目可以通过使用绿色途径生产有价值的化学物质来显着影响能源和环境区域。它将通过利用可持续的能源（例如阳光）来减少二氧化碳的排放。技术细节：该科学领域进步的主要障碍是缺乏对合成方法，微体系结构和纳米结构以及由此产生的物理化学和反应性和反应性的性质之间的关系。在这些新的功能属性可以找到实际的实际应用之前，必须面对这种理解和开发全新的制造方法，这是必须满足的主要挑战。 实现这两个目标，一个科学和另一个技术，将与一个重大突破相对应，这将使整个新应用程序成为可能。该项目的重点是通过多种技术在纳米镜面上修饰的基于钙钛矿的纳米结构膜和粉末的合成，这些技术允许化学掺杂，控制晶体结构，缺陷浓度以及对不寻常的新形态的施加。 这项研究为将二氧化碳转化为有价值的化学产品提供了全新的方向。 该项目旨在探索几种策略，以通过批量和表面敏感的特征技术在这些材料的反应性和物理化学特性之间建立联系。当在正确的氧化态，浓度和位置引入掺杂剂时，该项目还寻求更好地了解掺杂剂在二氧化碳界面反应中的作用，从而可以导致催化活性显着增加。这项研究的一个不寻常的部分是利用掺杂的纳米结构膜，在该膜中，粒度和组成都可以通过一种新的纳米化方法来精确控制。 此外，该项目旨在探索钙钛矿氧化物的形态控制，以提高其表面积和光捕获能力。最后，该项目扩大了研究生和本科级别的教学课程和研究机会，并大量纳入了代表性不足的学生。