高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (4): 20210688.doi: 10.7503/cjcu20210688

• 分析化学 • 上一篇    下一篇

冠醚功能化的栅控石墨烯场效应晶体管的制备及对汞离子的检测

曹磊2, 陈美君2, 袁刚2, 常钢3, 张修华2, 王升富2, 何汉平1,2()   

  1. 1.湖北大学省部共建生物催化与酶工程国家重点实验室
    2.化学化工学院
    3.材料科学与工程学院, 武汉 430062
  • 收稿日期:2021-09-24 出版日期:2022-04-10 发布日期:2021-12-20
  • 通讯作者: 何汉平 E-mail:hehanping@hubu.edu.cn
  • 基金资助:
    省部共建生物催化与酶工程国家重点实验室开放基金(SKLBEE2020016);国家自然科学基金(52171177)

Solution-gated Graphene Field Effect Transistor Sensor Based on Crown Ether Functionalization for the Detection of Mercury Ion

CAO Lei2, CHEN Meijun2, YUAN Gang2, CHANG Gang3, ZHANG Xiuhua2, WANG Shengfu2, HE Hanping1,2()   

  1. 1.State Key Laboratory of Biocatalysis and Enzyme Engineering
    2.College of Chemistry and Chemical Engineering
    3.College of Materials Science and Engineering,Hubei University,Wuhan 430062,China
  • Received:2021-09-24 Online:2022-04-10 Published:2021-12-20
  • Contact: HE Hanping E-mail:hehanping@hubu.edu.cn
  • Supported by:
    the Open Project Funding of the State Key Laboratory of Biocatalysis and Enzyme Engineering, China(SKLBEE2020016);the National Natural Science Foundation of China(52171177)

摘要:

Hg2+是一种具有生物蓄积性和毒性的重金属, 对环境和人类健康均可造成严重损害. 因此, 开发便捷的Hg2+传感器非常必要. 本文基于溶液栅控石墨烯场效应晶体管的优异性能, 通过氮硫杂冠醚的尺寸效应以及冠醚与Hg2+的螯合作用来特异性识别Hg2+, 制备了一种冠醚功能化栅极的溶液栅控石墨烯场效应晶体管(SGGT)传感器. 该SGGT传感器因其固有的信号放大功能而比传统电化学检测Hg2+更灵敏, 其检出限为1×10-12 mol/L, 比传统电化学传感器降低了2~3个数量级, 在1×10-12~1×10-7 mol/L检测范围内, 狄拉克点的变化值与目标物浓度的对数值之间存在良好的线性关系, 同时具有极高的选择性. 对实际湖水样品的检测效果良好, 对Hg2+的检测标准偏差为1.10%~3.77%. 本文结果表明, 该晶体管传感器可以对Hg2+进行高选择和高灵敏检测.

关键词: 溶液栅控场效应晶体管, 石墨烯, 冠醚, Hg2+

Abstract:

Hg2+ is a heavy metal with bioaccumulation and toxicity, causing serious damage to the environment and human health. Therefore, it is very necessary to develop a convenient Hg2+ sensor. Because of the excellent performance of graphene field-effect transistors, this work prepared a solution-gated graphene field effect transistor (SGGT) sensor with crown ether functionalized gate. The selectivity of the transistor sensor was achieved through the size effect of crown ether and the chelation of N and S atoms on the crown ether, which makes the sensor recognize Hg2+ specifically. The research showed that the SGGT sensor is more sensitive than traditional electrochemistry due to its inherent signal amplification function, which is 2—3 orders of magnitude lower, and the detection limit is as low as 1×10-12 mol/L in this study. In the detection range of 1×10-12—1×10-7 mol/L, the result exhibited an excellent linear relationship between the change value of the Dirac point and the logarithm of the target concentration. Moreover, it showed extremely high selectivity to Hg2+. The test of the real samples in the lake water was satisfactory, in which the detection standard deviation of Hg2+ is 1.10%—3.77%. The study indicated that the transistor sensor can detect Hg2+ in complex samples with high selectivity and sensitivity.

Key words: Solution-gated graphene transistor(SGGT), Graphene, Crown ether, Hg2+

中图分类号: 

TrendMD: