SGER: NANOPOROUS THIN-FILM OXIDE ELECTRODES FOR PHOSPHATE SENSING

SGER：用于磷酸盐传感的纳米多孔薄膜氧化物电极

• 批准号: 0836625
• 负责人: Marc Anderson
• 金额: --
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2011-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0836625&HistoricalAwards=false
• 关键词: SGER; NANOPOROUS; THIN; FILM; OXIDE

CBET-0836625M. Anderson, University of Wisconsin MadisonIntellectual Merrit: It has been shown that a phosphate sensor can be fabricated using a microporous iron oxide thin film electrode. The reduction potential of Fe (IIII) to Fe (II) is shown to be a function of phosphate concentration. The adsorption of phosphate to the surface of the iron oxides alters current vs. voltage behavior of the electrode. Phosphate levels in solution as low as 10-9M and several orders of magnitude have been measured. The hypothesis of the proposal is that the potential of the oxidation-reduction peak of iron is a function of phosphate adsorbed as well as its speciation in solution. Coupled with an in-situ pH probe and chemical equilibrium modeling using it may be possible to develop a unique sensor capable of measuring the concentration and speciation of additional analytes such as arsenates, silicates, carbonates, acetates, etc.Broader Impacts: The importance of phosphorus as the limiting nutrient in aquatic systems was first documented in whole lake fertilization experiments conducted by Schindler in the Ontario Experimental Lakes Area in 1974. Excess phosphorus can lead to undesired growth of algae and other aquatic vegetation, ultimately causing the eutrophication of natural water bodies. The development of an in-situ electrochemical phosphate sensor would allow for near-instantaneous measurements in natural waters, making analysis more convenient and less expensive. A real-time sensor would allow for the synchronization of phosphate monitoring data with transient weather events, and would facilitate rapid feedback for phosphate control strategies. While commercially available sensors exist for the nitrogen nutrients, no such sensor exists for phosphate. This proposal addresses this need. In this project, Prof. Anderson, and Dr. Isabel Tejedor, will train one PhD student. Dr. Tejedor serves as a role model for young undergraduate and graduate students and especially for woman in science and engineering. As a native Spanish-speaking person, Dr. Tejedor provides not only the academic and laboratory skills as a mentor but as well the cultural and language exposure that the students would otherwise not obtain working under the guidance of other English-speaking individuals.

CBET-0836625M。安德森，威斯康星大学麦迪逊分校智力优点：研究表明，可以使用微孔氧化铁薄膜电极制造磷酸盐传感器。 Fe (IIII) 还原成 Fe (II) 的还原电位是磷酸盐浓度的函数。磷酸盐吸附到氧化铁表面会改变电极的电流与电压行为。已测得溶液中的磷酸盐含量低至 10-9M 和几个数量级。该提案的假设是铁的氧化还原峰的电位是吸附的磷酸盐及其在溶液中的形态的函数。与原位 pH 探针和化学平衡建模相结合，有可能开发出一种独特的传感器，能够测量砷酸盐、硅酸盐、碳酸盐、醋酸盐等其他分析物的浓度和形态。 更广泛的影响：磷作为水生系统中限制性养分的重要性首次记录在 Schindler 在安大略省进行的全湖施肥实验中 1974年的实验湖区。过量的磷会导致藻类和其他水生植被的不良生长，最终导致天然水体的富营养化。原位电化学磷酸盐传感器的开发将允许在天然水中进行近乎瞬时的测量，使分析更加方便且成本更低。实时传感器将允许磷酸盐监测数据与瞬态天气事件同步，并有助于磷酸盐控制策略的快速反馈。虽然存在用于氮营养物的市售传感器，但不存在用于磷酸盐的此类传感器。本提案解决了这一需求。在这个项目中，Anderson 教授和 Isabel Tejedor 博士将培养一名博士生。 Tejedor 博士是年轻本科生和研究生，尤其是科学和工程领域女性的榜样。作为一名以西班牙语为母语的人，Tejedor 博士不仅提供了作为导师的学术和实验室技能，还提供了学生在其他英语人士的指导下无法获得的文化和语言接触机会。