研究报告

  • 伊雯雯,韩春晓,李忠平,郭玉晶.基于g-C3N4纳米片/氧化石墨烯复合材料电化学传感器检测水体中左氧氟沙星研究[J].环境科学学报,2022,42(4):248-258

  • 基于g-C3N4纳米片/氧化石墨烯复合材料电化学传感器检测水体中左氧氟沙星研究
  • Electrochemical detection of levofloxacin based on g-C3N4 nanosheets /graphene oxide composite in water
  • 基金项目:国家自然科学基金(No.21775095);山西省重大科技攻关项目(No.20191102005);山西省第十二批“百人计划”
  • 作者
  • 单位
  • 伊雯雯
  • 山西大学环境科学研究所,太原 030006
  • 韩春晓
  • 山西大学环境科学研究所,太原 030006
  • 李忠平
  • 山西大学环境科学研究所,太原 030006
  • 郭玉晶
  • 山西大学环境科学研究所,太原 030006
  • 摘要:近年来,随着抗生素的滥用和不加控制的排放,水体中抗生素的检测已经成为环境分析的一个重要研究领域.本文采用简单的超声方法将超薄石墨相氮化碳纳米片(g-C3N4 Ns)固定在氧化石墨烯(GO)的表面,形成g-C3N4 Ns/GO纳米复合材料,制备了一种基于石墨相氮化碳/氧化石墨烯的新型电化学传感器,用于环境水样中左氧氟沙星(LEV)的检测.在优化的实验条件下,利用差分脉冲伏安法(DPV)对LEV进行检测,线性范围为0.25~90 μmol·L-1,检出限为0.073 μmol·L-1.该传感器具有良好的稳定性、灵敏度、抗干扰能力和制备简单等优势,并成功地用于测定河水和自来水样中的LEV,具有良好的回收率,为左氧氟沙星的灵敏检测提供了一种可行的方案.
  • Abstract:In recent years, with the abuse and uncontrolled discharge of antibiotics, the detection of antibiotics has become a momentous research field of environmental analysis in water. In this paper, an ultra-thin graphite phase carbon nitride nanosheets (g-C3N4 Ns) were immobilized onto the surface of graphene oxide (GO) by simple ultrasonic method to form g-C3N4 Ns/GO nanocomposite. A novel electrochemical sensor based on graphite phase carbon nitride/graphene oxide was constructed for the detection of levofloxacin (LEV) in sample of environmental water. Under optimized experimental conditions, the sensor was used to detect LEV by using differential pulse voltammetry (DPV), with a linear range of 0.25~90 μmol·L-1 and a detection limit of 0.073 μmol·L-1. The sensor had the advantages of good stability, satisfactory sensitivity, anti-interference ability and simple preparation, and had been successfully used in the determination of LEV in river water and tap water samples with good recovery rate. It provided a feasible scheme for the sensitive detection of levofloxacin.

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