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首页> 外文期刊>Russian journal of electrochemistry >Electrochemical determination of p-cresol using mesoporous TiO _2-modified carbon paste electrode
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Electrochemical determination of p-cresol using mesoporous TiO _2-modified carbon paste electrode

机译:介孔TiO _2修饰碳糊电极电化学测定对甲酚

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摘要

A mesoporous TiO _2 (meso-TiO _2) was synthesized, and used to prepare modified carbon paste electrode (CPE). The electrochemical sensing properties were characterized using K _3[Fe(CN) _6], showing that meso-TiO _2 modified CPE possesses larger surface area and higher electron transfer rate. The electrochemical behavior of p-cresol was investigated. At the meso-TiO _2 modified CPE, the oxidation peak current of p-cresol remarkably increases, and the oxidation peak potential shifts negatively, suggesting that meso- TiO _2 exhibits highly efficient catalytic activity to the oxidation of p-cresol. Based on this, a sensitive, rapid and convenient electrochemical method was developed for the detection of p-cresol. The linear range is from 1.5 × 10 ~(-7) and 2.0 × 10 ~(-5) mol l ~(-1), and the limit of detection is as low as 8.0 × 10 ~(-8) mol l ~(-1). Finally, the new method was successfully used to determine p-cresol in water samples.
机译:合成了介孔TiO _2(meso-TiO _2),并用于制备改性碳糊电极(CPE)。用K _3 [Fe(CN)_6]表征了电化学传感性能,表明介孔TiO_2改性的CPE具有较大的表面积和较高的电子传递速率。研究了对甲酚的电化学行为。在介孔TiO _2改性的CPE上,对甲酚的氧化峰电流显着增加,并且氧化峰电位负向移动,这表明介孔TiO _2对对甲酚的氧化表现出高效的催化活性。在此基础上,开发了灵敏,快速,方便的电化学方法检测对甲酚。线性范围为1.5×10〜(-7)和2.0×10〜(-5)mol l〜(-1),检出限低至8.0×10〜(-8)mol l〜 (-1)。最后,该新方法已成功用于测定水样中的对甲酚。

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