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。威斯康星大学麦迪逊特色大学的安德森（Anderson）：已经表明，可以使用微孔氧化铁薄膜电极制造磷酸盐传感器。 Fe（IIII）对Fe（II）的降低潜力被证明是磷酸盐浓度的函数。磷酸盐对铁氧化物表面的吸附改变了电极的电流与电压行为。溶液中低至10-9m的磷酸盐水平，已经测量了几个数量级。该提案的假设是铁的氧化还原峰的潜力是吸附磷酸盐的函数及其在溶液中的物种形成。结合使用它的原位pH探针和化学平衡建模，可以开发出一个独特的传感器，能够测量诸如砷，硅酸盐，硅酸盐，碳酸盐，醋酸盐等其他分析物的集中和形成的独特传感器。 1974年的实验湖泊区域。过量的磷可能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域进行近乎触及的测量，从而使分析更加方便且便宜。实时传感器将允许与瞬时天气事件同步磷酸盐监测数据，并促进磷酸盐控制策略的快速反馈。尽管存在用于氮营养素的市售传感器，但磷酸盐却没有这种传感器。该提案解决了这一需求。在这个项目中，安德森教授和伊莎贝尔·蒂杰德（Isabel Tejedor）博士将培训一名博士生。 Tejedor博士是年轻的本科生和研究生，尤其是科学和工程女性的榜样。作为一个讲西班牙语的人，Tejedor博士不仅提供了作为导师的学术和实验室技能，而且还提供了在其他讲英语的人的指导下学生无法获得的文化和语言曝光。