Molecular-Based Studies of Metal, Metal Oxide and Metal Sulfide Nanoparticle Transformations in the Environment

环境中金属、金属氧化物和金属硫化物纳米粒子转化的分子研究

• 批准号: 1606607
• 负责人: Vicki Grassian
• 金额: $ 45万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1606607&HistoricalAwards=false
• 关键词: Molecular; Based; Studies; Metal; Oxide

In this project funded by the Environmental Chemical Sciences Program in the Chemistry Division at the National Science Foundation, Professor Vicki H. Grassian of the University of California San Diego is investigating how metal-based nanomaterials change and transform in the environment. The proposed activities focus on molecular-based studies to better understand chemical changes in metal, metal oxide and metal sulfide nanoparticles in the environment. Although in the past decade, a number of studies have focused on environmental studies of nanoparticles in their native states, while only a few studies have focused on the molecular details of how nanoparticles can change due to chemical processing in the environment. Nanoparticles can age and undergo transformations under ambient conditions of temperature, relative humidity and in the presence of solar radiation. As these materials age and transform, their properties are altered making it difficult to identify structure?property?function and structure?property?hazard relationships. This research studies the impact of nanoparticle in the environment as well their interactions with biomolecules and biological systems. The broader impact of these studies advance the goals of sustainable nanotechnology and provide a foundation for broadening participation and training and engaging students at all levels through research, teaching and outreach activities. These studies provide students with an opportunity to engage in a highly interdisciplinary research area that involves environmental science, nanoscience, engineering, colloid science, materials and surface chemistry.This research program studies the cxidation of metal and metal sulfide nanoparticles in humid and aqueous environments, carbonate formation of metal oxide nanoparticles in humid environments, and surface ligand reactions (adsorption and displacement) on nanoparticles in aqueous environments. These studies are used to better understand the potential environmental and health implications of nanoscience and nanotechnology and contribute to answering questions concerning the transformation and fate of manufactured nanomaterials. As nanomaterials age and transform, their properties are altered making it difficult to identify structure-property-function and structure-property-hazard relationships. Therefore aging impacts their behavior in the environment as well their interactions with biomolecules and biological systems. In particular, the proposed activities focus on better understanding transformations of metal, metal oxide and metal sulfide nanoparticles (including Cu, CuO, CuS, Ag2S, ZnO ZnS and TiO2) on a molecular level and how these processes impact nanoparticle physicochemical properties important in the environmental, health, and safety (EHS) considerations of these materials.

在国家科学基金会化学部的环境化学科学计划资助的该项目中，加利福尼亚大学圣地亚哥分校的Vicki H. Grassian教授正在研究基于金属的纳米材料如何改变环境中的纳米材料。提出的活动集中于基于分子的研究，以更好地了解环境中金属，金属氧化物和金属硫化物纳米颗粒的化学变化。尽管在过去的十年中，许多研究集中在其本地状态的纳米颗粒的环境研究上，而只有少数研究集中在分子细节上，即纳米颗粒如何由于环境中的化学处理而发生变化的分子细节。纳米颗粒可以在温度，相对湿度和太阳辐射的情况下变老并经历转变。随着这些材料的年龄和变化，它们的特性会改变，从而难以识别结构？属性？功能和结构？属性？危害关系。这项研究研究了纳米颗粒对环境的影响，以及它们与生物分子和生物系统的相互作用。 这些研究的广泛影响推进了可持续纳米技术的目标，并通过研究，教学和外展活动为各个级别的参与和吸引学生提供了基础。 These studies provide students with an opportunity to engage in a highly interdisciplinary research area that involves environmental science, nanoscience, engineering, colloid science, materials and surface chemistry.This research program studies the cxidation of metal and metal sulfide nanoparticles in humid and aqueous environments, carbonate formation of metal oxide nanoparticles in humid environments, and surface ligand reactions (adsorption and displacement) on水性环境中的纳米颗粒。 这些研究用于更好地了解纳米科学和纳米技术的潜在环境和健康影响，并有助于回答有关制造纳米材料的转化和命运的问题。 随着纳米材料的年龄和变化，它们的特性被改变，因此很难识别结构 - 良好功能和结构范围内的危害关系。因此，衰老会影响他们在环境中的行为，以及它们与生物分子和生物系统的相互作用。尤其是，拟议的活动集中于更好地理解金属，金属氧化物和金属硫化物纳米颗粒（包括Cu，Cu，Cu，CUS，AG2S，AG2S，ZnO ZNS和TIO2）上的分子水平以及这些过程如何影响纳米粒子物理化学特性，对环境，健康和安全（ehs）考虑这些材料对这些材料的考虑重要。