SGER: Novel Photocatalysts for the Degradation of Toxic Organics utilizing Visible Radiation

SGER：利用可见辐射降解有毒有机物的新型光催化剂

• 批准号: 0097347
• 负责人: Panagiotis Smirniotis
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0097347&HistoricalAwards=false
• 关键词: SGER; Novel; Photocatalysts; Degradation; Toxic

AbstractProposal Title: SGER: Novel Photocatalysts for the Degradation of Toxic Organics Utilizing Visible RadiationProposal Number: CTS-0097347Principal Investigator: Panagiotis SmirniotisInstitution: University of CincinnatiThe objective of this proposal is to determine the feasibility of using doped titanium dioxide photocatalysts for the degradation of toxic organics with visible radiation. Although titanium dioxide is a photocatalyst when illuminated with ultraviolet radiation, preliminary experiments by the PI have shown that doping of titanium dioxide with transition metals provides photocatalytic activity with light from the visible part of the spectrum. This phenomenon may result from the creation of a narrow energy band within the original bandgap of the semiconductor, thus facilitating the generation of electrons and holes. This two-stage excitation process can form electrons and holes utilizing lower energy quanta. The proposed research will be an interdisciplinary program focusing on the synthesis and characterization of selected combinations of transition metals on different types of supports including three-dimensional mesoporous molecular sieves, large pore zeolites, and high surface-area titanium dioxide and silicon dioxide. These catalysts will be tested with selected probe molecules to simulate different categories of toxic organics. If the proposed materials are proven to be successful photocatalysts, they will offer a potentially economic alternative for the destruction of toxic organics from aqueous and gaseous systems utilizing solar radiation.

摘要提案标题：SGER：利用可见光辐射降解有毒有机物的新型光催化剂提案编号：CTS-0097347主要研究者：Panagiotis Smirniotis机构：哥伦比亚大学本提案的目的是确定使用掺杂的二氧化钛光催化剂在可见光辐射下降解有毒有机物的可行性。 虽然二氧化钛在紫外线照射下是一种光催化剂，但PI的初步实验表明，用过渡金属掺杂二氧化钛可提供光谱可见光部分的光催化活性。 这种现象可能是由于在半导体的原始带隙内产生了窄能带，从而促进了电子和空穴的产生。 这种两阶段激发过程可以利用较低能量的量子形成电子和空穴。 拟议的研究将是一个跨学科的计划，重点是在不同类型的支持，包括三维介孔分子筛，大孔沸石，高表面积二氧化钛和二氧化硅的过渡金属的选择组合的合成和表征。 这些催化剂将与选定的探针分子进行测试，以模拟不同类别的有毒有机物。如果所提出的材料被证明是成功的光催化剂，它们将为利用太阳辐射破坏水和气体系统中的有毒有机物提供一种潜在的经济替代方案。