Spray Synthesis of Shape-Defined Nanocrystals

喷雾合成定形纳米晶体

• 批准号: 1608711
• 负责人: Sara Skrabalak
• 金额: $ 44.5万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1608711&HistoricalAwards=false
• 关键词: Spray; Synthesis; Shape; Defined; Nanocrystals

Non-technical AbstractWith the support of the Solid State and Materials Chemistry program, this project provides new synthetic methods that can be predictably manipulated to yield materials with controllable composition and structure. This control allows the properties of materials to be enhanced for applications in solar energy conversion and catalysis. This expansion of the synthetic toolkit is achieved in this project by integrating new chemical methods with the aerosol technique ultrasonic spray synthesis, which provides a scalable route to solids. The principal investigator and her students develop these methods to achieve new materials for energy applications, with the goal being the elucidation of criteria for the synthesis and design of materials with the ability to use light efficiently to drive chemical reactions. Ultimately, this research forges links between disciplines that include nano/inorganic/solid-state chemistry, condensed matter physics, chemical engineering and materials science by distributing new knowledge through high-impact publications and presentations. This research also enhances scientific training through multidisciplinary research and outreach activities.Technical AbstractSpecifically, by spatially and temporally confining molten salt syntheses with aerosol droplets, crystal growth can be limited to the nanoscale. This project demonstrates that the supersaturation conditions achieved within the aerosol droplets can be manipulated to achieve nanocrystals with different shapes. This ability is being used to synthesize shape-defined metal oxynitride nanocrystals for photocatalytic applications by topotactic conversion of nanoscale templates prepared by aerosol-assisted molten salt synthesis. This ability is also being used to synthesize shape-controlled layered double hydroxide nanocatalysts by aerosol-assisted molten salt syntheses. This project is enabling ultrasonic spray synthesis to emerge as a general and continuous route to advanced nanomaterials and brings new perspective to both confined nanomaterial syntheses and molten salt syntheses.

非技术摘要在固态和材料化学项目的支持下，该项目提供了新的合成方法，可以通过可预测的操作来生产具有可控成分和结构的材料。这种控制可以增强材料的性能，用于太阳能转换和催化应用。该项目通过将新的化学方法与气溶胶技术超声喷雾合成相结合，实现了合成工具包的扩展，从而提供了可扩展的固体途径。首席研究员和她的学生开发了这些方法来获得用于能源应用的新材料，目标是阐明能够有效利用光驱动化学反应的材料的合成和设计标准。最终，这项研究通过高影响力的出版物和演示传播新知识，在纳米/无机/固态化学、凝聚态物理、化学工程和材料科学等学科之间建立了联系。这项研究还通过多学科研究和推广活动加强了科学培训。技术摘要具体来说，通过在空间和时间上限制气溶胶液滴的熔盐合成，可以将晶体生长限制在纳米尺度。该项目表明，可以控制气溶胶液滴内实现的过饱和条件以获得不同形状的纳米晶体。这种能力被用于通过气溶胶辅助熔盐合成制备的纳米级模板的拓扑转化来合成用于光催化应用的形状限定的金属氮氧化物纳米晶体。这种能力还被用于通过气溶胶辅助熔盐合成来合成形状控制的层状双氢氧化物纳米催化剂。该项目使超声波喷雾合成成为先进纳米材料的通用且连续的途径，并为受限纳米材料合成和熔盐合成带来了新的视角。