三维多孔碳纳米材料用于烟用纸张中五氯苯酚的测定方法研究

Determination of Pentachlorophenol in Cigarette Paper Using Three-dimensional Porous Carbon Nanomaterials

中文关键词:  烟用纸张  三维多孔碳纳米材料  电化学传感器  五氯苯酚  检测/监测

英文关键词:cigarette paper  three-dimensional porous carbon nanomaterials  electrochemical sensor, pentachlorophenol  determination/monitoring

中文摘要:

      目的 建立烟用纸张中五氯苯酚(PCP)的快速电化学测定方法。方法 基于沸石咪唑酯骨架(ZIF)的ZIF–8、ZIF–67具有相同的晶胞参数和同构性，以ZIF–8@ZIF–67为模板制备三维纳米多孔碳(NGPC)。利用NGPC的高比表面积以及优异的电子传递效率构建的传感器(记作NGPC/SPCE)对PCP具有很好的响应。结果 在0.86 V的检测电位下，NGPC/SPCE具有较高的灵敏度(2.452 µA.cm⁻².L.mg⁻¹)。传感器对PCP的检测具有良好的选择性。传感器对PCP检测具有较好的准确度和精密度。3个浓度梯度的回收率为95.7~98.6;6次测试结果的相对标准偏差为2.07%。传感器对PCP的检测具有较好的长期稳定性。同一传感器连续检测25 d后，仍保持原先88.1%的响应。结论 文中构建的传感器适用于对烟用纸张中PCP的检测，并能获得理想的检测结果。

英文摘要:

      The work aims to develop a rapid electrochemical determination method of pentachlorophenol (PCP) in cigarette paper. Based on the same unit cell parameters and isomorphism of ZIF-8 and ZIF-67, the three-dimensional nanoporous carbon (NGPC) was prepared with ZIF-8@ZIF-67 as a template. Considering the advantage of the large specific surface area and high electron transfer efficiency of NGPC, the constructed sensor (named NGPC/SPCE) had a good response to PCP. At the detection potential of 0.86 V, the sensor had a high sensitivity (2.452 µA.cm−2.L.mg−1) with good selectivity. Besides, the sensor possessed good accuracy and precision for detection of PCP. The recovery results of the three concentration gradients were between 95.7%-98.6%. Additionally, the relative standard deviation of the six consecutive test results was 2.07%. The sensor had good long-term stability for detection of PCP. After 25 days of continuous detection, the sensor can still maintain 88.1% of the initial sensitivity. Thus, the sensor developed in the work is suitable for detection of PCP in cigarette paper with a satisfactory result.