Ti–O coupled graphene edges induced high electrochemical activity of the carbon film

IF 4.9 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchemical Journal Pub Date : 2025-03-04 DOI:10.1016/j.microc.2025.113258

Yuanyuan Cao, Linwang Li, Xuebin Liu, Haohua Zhong

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Abstract

In this work, we investigated the electrochemical activity induced by the Ti–O coupled graphene edges on the graphene structured carbon (GSC) film. The Ti-O-GSC film was prepared by the electron cyclotron resonance (ECR) plasma sputtering system under low energy electron irradiation with O and Ti atoms doped in one step. According to the nanostructure characterization, the graphene edges and groups with O and Ti were formed on the surface of film. In the Fe(CN)₆^4−/3− and Fe^3+/2+ redox systems, the redox peak separation was reduced to 69.6 m V and 611.5 m V, respectively, and the charge-transfer resistance decreased from 507.50 Ω·cm² to 15.88 Ω·cm², due to the doping of O and Ti. In the sensing of the DNA bases, the Ti-O-GSC film reduced the oxidation potentials to 138 mV and 755.2 mV for adenine and guanine, and realized the simultaneous detection of adenine and guanine with detection limits of 1.09 μM and 0.76 μM. The mechanism could be that the simultaneous presence of Ti and O atoms at the graphene edge facilitates numerous active sites, improving the electrochemical activity of the Ti-O-GSC film. These results indicate that the Ti-O-GSC films are promising electrode materials to construct sensitive electrochemical biosensors.

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来源期刊

Microchemical Journal 化学-分析化学

CiteScore

8.70

自引率

8.30%

发文量

1131

审稿时长

1.9 months

期刊介绍： The Microchemical Journal is a peer reviewed journal devoted to all aspects and phases of analytical chemistry and chemical analysis. The Microchemical Journal publishes articles which are at the forefront of modern analytical chemistry and cover innovations in the techniques to the finest possible limits. This includes fundamental aspects, instrumentation, new developments, innovative and novel methods and applications including environmental and clinical field. Traditional classical analytical methods such as spectrophotometry and titrimetry as well as established instrumentation methods such as flame and graphite furnace atomic absorption spectrometry, gas chromatography, and modified glassy or carbon electrode electrochemical methods will be considered, provided they show significant improvements and novelty compared to the established methods.