SGER: Metallic Nanocatalysts for Rapid Transformation of Polychlorinated Dibenzo-p-Dioxins

摘要/ abstract摘要：黄伟林罗格斯大学：多氯二苯并-对二恶英快速转化的金属纳米催化剂本项目旨在探索开发铁基纳米催化剂在环境条件下快速转化有毒多氯二苯并-对二恶英（PCDDs）和多氯二苯并呋喃（PCDFs）的可行性和有效性。PCDD/Fs因其对人类的高毒性、广泛分布和在环境中的持久性而受到高度关注。PI最近发现，微米尺寸范围内的零价铁（Fe0）基双金属催化剂可以将1,2,3,4- tcdd转化为二氯和单氯二苯并-对二恶英，半衰期为1小时。PI的结果表明，反应发生在溶液-催化剂界面，反应速率与催化剂的比表面积成正比。具有类似成分的纳米级铁颗粒由于其非常大的比表面积，应该更有效。在这项研究中，PI将合成和表征一系列不同的基于fe0的纳米催化剂，这些纳米催化剂具有金、银、铂和钯的涂层，并测试它们快速转化PCDD/Fs的能力。如果成功，这项研究将为环境中高毒性和高持久性PCDD/Fs的破坏开辟新的可能性。在环境条件下，利用基于fe0的纳米催化剂对这些化合物进行快速脱氯，将有可能净化被PCDD/Fs污染的超级基金场地。

ABSTRACTBES 0636820Weilin HuangRutgers UniversitySGER: Metallic Nanocatalysts for Rapid Transformation of Polychlorinated Dibenzo-p-DioxinsThe objective of this SGER project is to explore the feasibility and efficacy of developing iron-based nano-catalysts to rapidly transform toxic polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) under ambient conditions. PCDD/Fs are of great environmental concern because of their high toxicity to humans, widespread occurrence, and persistence in the environment. The PI recently found that zero-valent-iron (Fe0)-based bimetallic catalysts in the micrometer size range could transform 1,2,3,4-TCDD to di- and mono-chlorinated dibenzo-p-dioxins with a half life of one hour. The PI's results indicated that the reactions occurred at the solution-catalyst interface and rates were proportional to the specific surface area of the catalysts. Nano-scale iron particles of similar composition should be even more effective because of their very large specific surface areas. In this study, the PI will synthesize and characterize a range of different Fe0-based nanocatalysts with coatings of gold, silver, platinum and palladium and test them for their ability to rapidly transform PCDD/Fs. If successful, this study will open new possibilities for destruction of highly toxic and highly persistent PCDD/Fs in the environment. Rapid dechlorination of these compounds by Fe0-based nanocatalysts under ambient conditions would make it possible to decontaminate Superfund sites contaminated with PCDD/Fs.