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NiFe-Layered Double Hydroxide Nanosheet Arrays Supported on Carbon Cloth for Highly Sensitive Detection of Nitrite
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-02-09 00:00:00 , DOI: 10.1021/acsami.7b16536 Yue Ma 1, 2 , Yongchuang Wang 1, 2 , Donghua Xie 1, 2 , Yue Gu 1, 2 , Haimin Zhang 1 , Guozhong Wang 1 , Yunxia Zhang 1 , Huijun Zhao 1, 3 , Po Keung Wong 4
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-02-09 00:00:00 , DOI: 10.1021/acsami.7b16536 Yue Ma 1, 2 , Yongchuang Wang 1, 2 , Donghua Xie 1, 2 , Yue Gu 1, 2 , Haimin Zhang 1 , Guozhong Wang 1 , Yunxia Zhang 1 , Huijun Zhao 1, 3 , Po Keung Wong 4
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Excessive uptake of nitrite has been proven to be detrimental to the ecological system and human health. Hence, there is a rising requirement for constructing effective electrochemical sensors to precisely monitor the level of nitrite. In this work, NiFe-layered double hydroxide nanosheet arrays (NiFe-LDH NSAs) have been successfully fabricated on a carbon cloth (CC) substrate via a facile one-pot hydrothermal route. By integrating the collective merits of macroporous CC and NiFe-LDH NSAs such as superior electrical conductivity, striking synergistic effect between the dual active components, enlarged electrochemically active surface area, unique three-dimensional hierarchical porous network characteristics, and fast charge transport and ion diffusion, the proposed NiFe-LDH NSAs/CC architecture can be served as a self-supporting sensor toward nitrite detection. As a consequence, the resulting NiFe-LDH NSAs/CC electrode demonstrates superior nitrite sensing characteristics, accompanied by broad linear range (5–1000 μM), quick response rate (ca. 3 s), ultralow detection limit (0.02 μM), and high sensitivity (803.6 μA·mM–1·cm–2). Meanwhile, the electrochemical sensor possesses timeless stability, good reproducibility, and strong anti-interference feature. Importantly, the resulting sensor can determine nitrite level in tap and lake water with high recoveries, suggesting its feasibility for practical applications. These findings show that the obtained NiFe-LDH NSAs/CC electrode holds great prospect in highly sensitive and specific detection of nitrite.
中文翻译：
碳布上支持NiFe层的双氢氧化物纳米片阵列，用于高灵敏度检测亚硝酸盐
业已证明，过量吸收亚硝酸盐对生态系统和人类健康有害。因此，对构造有效的电化学传感器以精确监测亚硝酸盐水平的需求不断提高。在这项工作中，NiFe层状双氢氧化物纳米片阵列（NiFe-LDH NSAs）已通过一种简便的一锅水热法成功地在碳布（CC）基底上制成。通过整合大孔CC和NiFe-LDH NSA的集体优势，例如优越的导电性，双重活性成分之间的显着协同作用，扩大的电化学活性表面积，独特的三维分层多孔网络特性以及快速的电荷传输和离子扩散，提出的NiFe-LDH NSAs / CC体系结构可以用作亚硝酸盐检测的自支撑传感器。结果，所得的NiFe-LDH NSAs / CC电极表现出卓越的亚硝酸盐感测特性，并具有宽线性范围（5-1000μM），快速响应速率（约3 s），超低检测限（0.02μM）和高灵敏度（803.6μA·mM–1 ·cm –2）。同时，该电化学传感器具有永恒的稳定性，良好的重现性和强大的抗干扰功能。重要的是，最终的传感器可以确定回收率高的自来水和湖水中的亚硝酸盐含量，这表明其在实际应用中是可行的。这些发现表明，所获得的NiFe-LDH NSAs / CC电极在亚硝酸盐的高灵敏度和特异性检测中具有广阔的前景。
更新日期：2018-02-09
中文翻译：
碳布上支持NiFe层的双氢氧化物纳米片阵列，用于高灵敏度检测亚硝酸盐
业已证明，过量吸收亚硝酸盐对生态系统和人类健康有害。因此，对构造有效的电化学传感器以精确监测亚硝酸盐水平的需求不断提高。在这项工作中，NiFe层状双氢氧化物纳米片阵列（NiFe-LDH NSAs）已通过一种简便的一锅水热法成功地在碳布（CC）基底上制成。通过整合大孔CC和NiFe-LDH NSA的集体优势，例如优越的导电性，双重活性成分之间的显着协同作用，扩大的电化学活性表面积，独特的三维分层多孔网络特性以及快速的电荷传输和离子扩散，提出的NiFe-LDH NSAs / CC体系结构可以用作亚硝酸盐检测的自支撑传感器。结果，所得的NiFe-LDH NSAs / CC电极表现出卓越的亚硝酸盐感测特性，并具有宽线性范围（5-1000μM），快速响应速率（约3 s），超低检测限（0.02μM）和高灵敏度（803.6μA·mM–1 ·cm –2）。同时，该电化学传感器具有永恒的稳定性，良好的重现性和强大的抗干扰功能。重要的是，最终的传感器可以确定回收率高的自来水和湖水中的亚硝酸盐含量，这表明其在实际应用中是可行的。这些发现表明，所获得的NiFe-LDH NSAs / CC电极在亚硝酸盐的高灵敏度和特异性检测中具有广阔的前景。
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