首页> 外文会议>IEEE Sensors >Development of a low cost Hemin based dissolved oxygen sensor with anti-biofouling coating for water monitoring
【24h】

Development of a low cost Hemin based dissolved oxygen sensor with anti-biofouling coating for water monitoring

机译:低成本,具有抗生物污垢涂层的基于Hemin的溶解氧传感器的开发,用于水监控

获取原文

摘要

Conventional electrochemical dissolved oxygen (DO) sensors are expensive as they use Platinum in their construction. In addition, these sensors bio-foul when used in natural or wastewater, which leads to reduced sensitivity and variable performance. Here, we address these problems by i) replacing Platinum with Hemin as a low cost alternative for electrocatalysing the oxygen reduction reaction and ii) using silicone rubber (PDMS) functionalized with polyethyleneglycol (PEG) as the anti biofouling gas permeable membrane to provide selectivity with an increased lifetime. Our DO sensor has a sensitivity of 20.7 (μA/cm2)/(mg/L) over a DO concentration range of 7–2 mg/L. Also, the common interferences such as phosphate and nitrate show minor influence in DO detection. Furthermore, the PEG grafting PDMS membranes protects the sensor from biofouling for 20 days in accelerated bio-fouling condition, while the unfunctionalized sensor loses its sensitivity in less than one day.
机译:常规的电化学溶解氧(DO)传感器价格昂贵,因为它们在其结构中使用铂。此外,这些传感器在天然或废水中使用时会发生生物污染,从而导致灵敏度降低和性能可变。在这里,我们通过以下方法解决这些问题:i)用Hemin代替铂作为电催化氧还原反应的低成本替代品; ii)使用以聚乙二醇(PEG)官能化的硅橡胶(PDMS)作为抗生物污垢的透气膜,从而提供选择性延长使用寿命。在7–2 mg / L的DO浓度范围内,我们的DO传感器的灵敏度为20.7(μA/ cm 2 )/(mg / L)。同样,常见的干扰物(例如磷酸盐和硝酸盐)在溶解氧检测中显示出较小的影响。此外,PEG接枝的PDMS膜可在加速的生物污染条件下保护传感器20天不受生物污染,而未功能化的传感器会在不到一天的时间内失去灵敏度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号