Reduced graphene oxide-wrapped La0·8Sr0·2MnO3 microspheres sensing electrode for highly sensitive nitrite detection.

IF 5.6 1区化学 Q1 CHEMISTRY, ANALYTICAL

Talanta Pub Date : 2023-05-01 DOI:10.2139/ssrn.4359354

Chu-Yun Cheng, Yixin Zhang, Hongyu Chen, Yulong Zhang, Xinyi Chen, Miao Lu

引用次数: 3

Abstract

An electrochemical nitrite sensor based on perovskite oxides La0·8Sr0·2MnO3 (LSM) microspheres-decorated reduced graphene oxide (rGO) composite was presented to take the merit of the excellent electrocatalytic activity of the LSM and the large surface area of rGO. The content of rGO has been finely adjusted and the electrochemical sensor employing 15 wt% rGO has shown an ultralow nitrite detection limit of 0.016 μM and a high sensitivity of 0.041 μA μM-1 cm-2 and 0.039 μA μM-1 cm-2 in the range of 2-100 and 100-5000 μM, respectively. In addition, the proposed electrode shows good selectivity, reproducibility and stability, suitable for detection of nitrite at various pH values. The sensor was used to determine the nitrite level in environmental water samples with acceptable relative error, demonstrating its feasibility for practical environmental monitoring.

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还原氧化石墨烯包裹La0·8Sr0·2MnO3微球传感电极，用于高灵敏度亚硝酸盐检测。

利用钙钛矿氧化物La0·8Sr0·2MnO3 (LSM)微球修饰还原性氧化石墨烯(rGO)复合材料优异的电催化活性和rGO的大表面积的优点，提出了一种基于LSM修饰还原性氧化石墨烯复合材料的电化学亚硝酸盐传感器。在2-100 μM和100-5000 μM范围内，采用15wt % rGO的电化学传感器亚硝酸盐的超低检出限为0.016 μM，灵敏度分别为0.041 μA μM-1 cm-2和0.039 μA μM-1 cm-2。此外，该电极具有良好的选择性、重复性和稳定性，适用于各种pH值下亚硝酸盐的检测。将该传感器用于环境水样中亚硝酸盐水平的测定，相对误差可接受，证明了该传感器在实际环境监测中的可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

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