pH monitoring in high ionic concentration environments: performance study of graphene-based sensors.

IF 1.8 4区 化学 Q3 CHEMISTRY, ANALYTICAL Analytical Sciences Pub Date : 2024-11-02 DOI:10.1007/s44211-024-00682-9
Xin Qi, Wei Jin, Cao Tang, Xue Xiao, Rui Li, Yanqing Ma, Lei Ma
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Abstract

Graphene-based pH sensors, acclaimed for their exceptional sensitivity to environmental variations, have garnered significant interest in scientific research. However, the sensor performance in high ionic concentration environments is limited, due to the Debye length ion screening effect. In this study, an innovative graphene channel pH sensing device was developed and modified by cross-linked poly(methyl methacrylate) (PMMA). Furthermore, even in high ionic concentrations, the pH value can be precisely measured by this sensor. The sensor has remarkable sensitivity, and high response rate of - 70.49 mV/pH within the pH range from 7 to 10. Notably, the sensors retain uniform response direction and sensitivity under different ionic concentrations environmental and maintain consistent reversibility and stability. This advancement in sensor technology paves the way for broader applications in complex ionic environments.

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高离子浓度环境中的 pH 值监测:石墨烯基传感器的性能研究。
基于石墨烯的 pH 传感器因其对环境变化的超高灵敏度而备受赞誉,在科学研究中引起了极大的兴趣。然而,由于德拜长度离子筛选效应,传感器在高离子浓度环境中的性能受到限制。本研究开发了一种创新的石墨烯通道 pH 传感装置,并通过交联聚甲基丙烯酸甲酯(PMMA)对其进行了修饰。此外,即使在高离子浓度下,该传感器也能精确测量 pH 值。该传感器灵敏度极高,在 pH 值为 7 至 10 的范围内,响应速度高达 - 70.49 mV/pH。值得注意的是,该传感器在不同离子浓度环境下都能保持一致的响应方向和灵敏度,并能保持稳定的可逆性和稳定性。传感器技术的这一进步为在复杂离子环境中的更广泛应用铺平了道路。
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来源期刊
Analytical Sciences
Analytical Sciences 化学-分析化学
CiteScore
2.90
自引率
18.80%
发文量
232
审稿时长
1 months
期刊介绍: Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.
期刊最新文献
Artificial neural network in optimization of bioactive compound extraction: recent trends and performance comparison with response surface methodology. pH monitoring in high ionic concentration environments: performance study of graphene-based sensors. Ionic liquid applications in analytical chemistry Correction: Effect of the alkyl chain length of α,ω‑dichloroalkane on the Gibbs energy of transfer for functional groups. Construction of all-solid-state ion-selective sensors using electrolyte-containing polymers.
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