高等学校化学学报

高等学校化学学报

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纳米片FeSe基电化学传感器用于压裂返排液中痕量亚硝酸根的快速检测

张翔1, 2，吕海燕1, 2，吕宝强1, 2，吕小明1, 2，李娥3，徐春丽4，苏小东3
  

  1. 1.低渗透油气田勘探开发国家工程实验室

    2.中国石油长庆油田分公司油气技术研究院

    3.重庆科技大学化学化工学院 4.中央储备粮南充直属库有限公司

  • 收稿日期:2025-05-14 修回日期:2025-06-24 网络首发:2025-09-05 发布日期:2025-09-05
  • 通讯作者: 苏小东 E-mail:2008004@cqust.edu.cn
  • 基金资助:
    低渗透油气田勘探开发国家工程实验室开发课题（批准号：CQYT-CQYQY-2023-JS-1247）资助

Nanosheet FeSe-Based Electrochemical Sensor for Rapid Detection of Trace Nitrite Ions in Fracturing Flowback Fluid

ZHANG Xiang1, 2, LV Haiyan1, 2, LV Baoqiang1, 2, LV Xiaoming1, 2, LI E3, SU Xiaodong3, XU Chunli4   

  1. 1. National Engineering Laboratory for Exploration and Development of Low-Permeability Oil and Gas Fields

    2. Institute of Oil and Gas Technology, PetroChina Changqing Oilfield Branch

     3. College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology 4. Central Reserve Grain Nanchong Depository Company Limited

  • Received:2025-05-14 Revised:2025-06-24 Online First:2025-09-05 Published:2025-09-05
  • Contact: Xiaodong Su E-mail:2008004@cqust.edu.cn
  • Supported by:
    Supported by the National Engineering Laboratory of Low Permeability Oil and Gas Field Exploration and Development Development Development Topics (No.CQYT-CQYQY-2023-JS-1247)

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摘要： 利用水热法将含氧官能团的碳点（CDs）生长在介质阻挡放电（DBD）改性的柔性碳布（CC）上，构建了稳定、具有均匀锚定位点的CDs/CC超亲水基底材料。进一步通过简便快速的微波法在该基底上生长片状的FeSe纳米材料，构建FeSe/CDs/CC亚硝酸盐电化学传感器，并利用XRD、SEM、XPS、EDS等手段进行表征。电化学性能结果表明，CDs和FeSe的成功修饰显著提高了CC的电导率。在最佳检测条件下，氧化峰电流与0.3-10 μmol/L、10-1000 μmol/L范围内亚硝酸盐浓度呈良好的线性关系，灵敏度分别为5477.80 μA﹒mmol/L﹒cm2、1828.84 μA﹒mmol/L﹒cm2，检测限为0.11 μmol/L。此外，该传感器还具有优异的抗干扰能力、长期稳定性、重复性和重现性，压裂返排液中亚硝酸盐加标回收率在97.75%-103.12%之间。

关键词:  , FeSe/CDs/CC；亚硝酸盐；电化学传感器；压裂返排液

Abstract: A stable CDs/CC superhydrophilic substrate material with uniform anchoring sites was constructed by growing carbon dots (CDs) containing oxygen functional groups on dielectric barrier discharge (DBD)-modified flexible carbon cloth (CC) using a hydrothermal method. The FeSe/CDs/CC nitrite electrochemical sensor was further constructed by growing flaky FeSe nanomaterials on this substrate by a simple and rapid microwave method, and was characterised by XRD, SEM, XPS and EDS. The electrochemical performance results showed that the successful modification of CDs and FeSe significantly improved the conductivity of CC. Under the optimal detection conditions, the oxidation peak current showed a good linear relationship with the nitrite concentration in the ranges of 0.3-10 μmol/L and 10-1000 μmol/L, with the sensitivities of 5477.80 μA﹒mmol/L﹒cm2 and 1828.84 μA﹒mmol/L﹒cm2, and the detection limit of 0.11 μmol/L, respectively.In addition, the sensor possessed excellent immunity to interferences, long-term stability, repeatability and reproducibility, and the recoveries of nitrite spiked in the fracture flowback fluid were in the range of 97.75%-103.12%.

Key words: FeSe/CDs/CC, Nitrite; Electrochemical sensor, Fracture flowback fluid

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