首页> 外文期刊>International Journal of Electrochemical Science >Fabrication of a New Modified Tm3+- Carbon Paste Sensor Using Multi-Walled Carbon Nanotubes (MWCNTs) and Nanosilica Based on 4-Hydroxy Salophen
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Fabrication of a New Modified Tm3+- Carbon Paste Sensor Using Multi-Walled Carbon Nanotubes (MWCNTs) and Nanosilica Based on 4-Hydroxy Salophen

机译:基于多羟基碳纳米管和纳米碳纳米管(MWCNT)和纳米二氧化硅的新型改良Tm 3 + -碳糊传感器的制备

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In this research, a new modified carbon paste electrode (CPE) including multi-walled carbon nanotube (MWCNT) and nanosilica (NS) and 4-Hydroxy Salophen (HS) as a suitable ionophore was constructed and applicated as Tm3+-ion selective sensor. This electrode shows a Nernstian response (19.2?0.1 mV/decade) over concentration range of 1.0×10?8 to 1.0×10?3 mol L-1. The electrode detection limits was found to be 9.0×10?9 mol L-1 at a pH range of 3.1–7.8. The sensor has a response time of ~14 s. This electrode displays very good selectivity with respect to different interfering ions, including alkali, alkaline earth, transition and heavy metal ions. The created sensor was satisfactory applied to determine Tm3+ ions in presence of metal ions mixture and used as an indicator electrode in the potentiometric titration of Tm3+ ions with EDTA.
机译:在这项研究中,构造了一种新型的修饰碳糊电极(CPE),包括多壁碳纳米管(MWCNT)和纳米二氧化硅(NS)以及适合用作离子载体的4-羟基沙柳芬(HS),并将其用作Tm3 +离子选择性传感器。该电极在1.0×10-8至1.0×10-3mol -1的浓度范围内显示出能斯特响应(19.2〜0.1mV /十倍)。在3.1-7.8的pH范围内,电极的检测极限为9.0×10?9 mol L-1。传感器的响应时间约为14 s。该电极对不同的干扰离子(包括碱金属离子,碱土金属离子,过渡金属离子和重金属离子)显示出非常好的选择性。所创建的传感器可令人满意地用于在存在金属离子混合物的情况下确定Tm3 +离子,并在用EDTA电位滴定Tm3 +离子时用作指示电极。

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