Laser-induced graphene electrodes for electrochemical ion sensing, pesticide monitoring, and water splitting
Laser-induced graphene electrodes for electrochemical ion sensing, pesticide monitoring, and water splitting
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DOI：
10.1007/s00216-021-03519-w
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发表时间：
2021-09
影响因子：
4.3
通讯作者：
I. Kucherenko;Bolin Chen;Zachary T. Johnson;Alexander Wilkins;Delaney Sanborn;Natalie Figueroa-Félix
中科院分区：
文献类型：
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作者：
I. Kucherenko;Bolin Chen;Zachary T. Johnson;Alexander Wilkins;Delaney Sanborn;Natalie Figueroa-Félix
激光诱导石墨烯（LIG）已被证明是一种可扩展的制造路线，以创建克服与常规石墨烯电极制造相关的费用的石墨烯电极。在此，我们通过用金属纳米颗粒功能化LIG以用于离子传感、农药监测和水分解来扩展最初的LIG报告。LIG电极被转换成离子选择性传感器的功能化与聚（氯乙烯）为基础的膜含有K+和H+离子载体。这些离子选择性传感器表现出快速的响应时间（10-15 s），接近能斯特灵敏度（K+传感器为53.0 mV/dec，pH传感器为− 56.6 mV/pH），以及40天的长期储存稳定性，并能够在人工尿液中进行离子监测。农药生物传感器是通过用辣根过氧化物酶功能化LIG电极而创建的，并且对阿特拉津（28.9 nA/μM）显示出高灵敏度，而其他常见除草剂（草甘膦、麦草畏和2，4-二氯苯氧乙酸）的干扰可以忽略不计。最后，LIG电极也表现出小的析氢反应和析氧反应的过电位。析氧反应测试产生的过电位为448 mV和995 mV，分别为10 mA/cm 2和100 mA/cm 2。对于相应的电流密度，析氢反应测试得到35 mV和281 mV。这种多功能LIG平台为简单、高效的电化学传感和能量收集应用铺平了道路。
Laser-induced graphene (LIG) has shown to be a scalable manufacturing route to create graphene electrodes that overcome the expense associated with conventional graphene electrode fabrication. Herein, we expand upon initial LIG reports by functionalizing the LIG with metallic nanoparticles for ion sensing, pesticide monitoring, and water splitting. The LIG electrodes were converted into ion-selective sensors by functionalization with poly(vinyl chloride)-based membranes containing K+and H+ionophores. These ion-selective sensors exhibited a rapid response time (10–15 s), near-Nernstian sensitivity (53.0 mV/dec for the K+sensor and − 56.6 mV/pH for the pH sensor), and long storage stability for 40 days, and were capable of ion monitoring in artificial urine. The pesticide biosensors were created by functionalizing the LIG electrodes with the enzyme horseradish peroxidase and displayed a high sensitivity to atrazine (28.9 nA/μM) with negligible inference from other common herbicides (glyphosate, dicamba, and 2,4-dichlorophenoxyacetic acid). Finally, the LIG electrodes also exhibited a small overpotential for hydrogen evolution reaction and oxygen evolution reaction. The oxygen evolution reaction tests yielded overpotentials of 448 mV and 995 mV for 10 mA/cm2and 100 mA/cm2, respectively. The hydrogen evolution reaction tests yielded 35 mV and 281 mV for the corresponding current densities. Such a versatile LIG platform paves the way for simple, efficient electrochemical sensing and energy harvesting applications.