Improved Understanding of Photocatalysts for Selective Organic Transformations

提高对光催化剂选择性有机转化的理解

• 批准号: 1941524
• 金额: --
• 依托单位: University of York
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1941524
• 关键词: Improved; Understanding; Photocatalysts; Selective; Organic

Photocatalysts absorb light to drive chemical reactions. Metal oxide photocatalysts are cheap, corrosion resistant and have tremendous potential to contribute to low carbon emission technologies. For example, nanoparticles of TiO2 are used commercially for water remediation and self-cleaning surfaces. There is also significant work investigating related materials for selective chemical synthesis such as oxidation, reduction and radical chemistry. However, the understanding of structure and photochemical reactivity is severely lacking. The role of defects in particular is critical to solar-to-chemical conversion efficiency losses via electron-hole surface recombination, and defects play a critical role in catalysis. The aim of this project is to use a combination of structural and spectroscopic techniques to investigate defect concentration and structure and correlate this with light absorption and catalytic reactivity. This work will contribute to more generally applicable theoretical models of defect structure and function in metal oxide nanopowders to form guiding principles for modification of metal oxides for synthetic photocatalysis.

光催化剂吸收光来驱动化学反应。金属氧化物光催化剂价格便宜，耐腐蚀，具有巨大的潜力，有助于低碳排放技术。例如，TiO 2纳米颗粒在商业上用于水修复和自清洁表面。也有重要的工作研究相关材料的选择性化学合成，如氧化，还原和自由基化学。然而，对结构和光化学反应性的理解严重缺乏。缺陷的作用特别是通过电子-空穴表面复合对太阳能-化学转化效率损失至关重要，并且缺陷在催化中起关键作用。该项目的目的是使用结构和光谱技术的组合来研究缺陷浓度和结构，并将其与光吸收和催化反应性相关联。这项工作将有助于更普遍适用的理论模型的缺陷结构和功能的金属氧化物纳米粉末形成的指导原则，为金属氧化物的合成纳米粉末的改性。