Electro-Oxidation of Organics and Endocrine Disrupting Compounds in Wastewater

废水中有机物和内分泌干扰物的电氧化

• 批准号: 121852-2012
• 负责人: Thorpe, Steven
• 金额: $ 1.75万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=569235
• 关键词: Electro; Oxidation; Organics; Endocrine; Disrupting

Clean energy. Clean Water. Critical resources for Canada and the rest of the world. The overarching objectives of this research is to develop novel surface chemistries using cost effective and commercially viable nanomaterials and nanostructures for use in electrotechnologies for the production of clean energy and remediation of municipal/industrial waste streams. A significant incorrect premise in many electrochemical devices is that through reducing the size of a catalyst, the subsequent increase in the surface area to volume ratio of the catalyst leads to greater electrocatalytic performance. Several conflicting theories have been proposed to account for the three observed structure sensitvity trends ( an increase, a decrease, or an increase followed by a decrease at a critical size), but a major review article (1) studying many different electrochemical systems (e.g. hydrogen/oxygen production and utilization) revealed none of the current structure-sensitivity theories could adequately account for the trends observed within this work. Two new factors for catalyst design were identified; namely electrolyte effects and reactant size effects. These findings led to the development of a novel, unified geometric hypothesis which could account for the observed increase in electrocatalytic activity found for all systems studied.The major short term objectives of this proposal are: a) to further understand of structure sensitivity in catalyst design, b) to develop optimal chemistries for electrocatalysis, and c) to combine novel chemistries developed with the optimal structure-sensitve nanoscale for maximum efficiency and catalytic activity. For example, development of new Ta-W and Sn-Sb coatings has shown these materials to have great promise as electrocatalysts for the destruction of pathogens (E-coli), electro-oxidation of organic molecules (municipal waste/oxalic acid) and endocrine disrupting compounds (EDC - Bisphenol-A). The latter are of particular importance as the Government of Canada has listed 200 high priority chemicals (2) as toxic, with EDCs a major concern as they are not easily removed using conventional municipal wastewater treatments. This represents a very promising area for electrocatalyst development. Clean energy. Clean water.

清洁能源干净的水。加拿大和世界其他地区的关键资源。总体 这项研究的目的是开发新的表面化学，使用具有成本效益和商业可行的纳米材料和纳米结构，用于生产清洁能源和治理城市/工业废物流的电子技术。在许多电化学装置中，一个显著的不正确的前提是，通过减小催化剂的尺寸，催化剂的表面积与体积比的随后增加导致更大的电催化性能。几个相互矛盾的理论已被提出来解释三个观察到的结构灵敏度趋势（增加、减少或在临界尺寸增加后减少），但是一篇主要的综述文章（1）研究了许多不同的电化学系统，（例如氢/氧的生产和利用）没有显示出当前的结构-敏感性理论可以充分解释在这项工作中观察到的趋势。确定了催化剂设计的两个新因素，即电解质效应和反应物尺寸效应。 这些发现导致了一种新的、统一的几何假设的发展，该假设可以解释在所有研究的系统中观察到的电催化活性的增加。a）进一步理解催化剂设计中的结构敏感性，B）开发用于电催化的最佳化学，和c）将开发的新型化学物质与最佳结构敏感纳米级结合起来，以获得最大的效率和催化活性。联合收割机。例如，新的Ta-W和Sn-Sb涂层的开发已经表明这些材料作为电催化剂具有很大的前景，用于破坏病原体（大肠杆菌）、有机分子（城市废物/草酸）和内分泌干扰化合物（EDC -双酚A）的电氧化。后者特别重要，因为加拿大政府已将200种高优先级化学品列为有毒物质，其中EDCs是一个主要问题，因为它们不容易使用传统的城市废水处理方法去除。这代表了电催化剂发展的一个非常有前途的领域。清洁能源干净的水。