轻松制备高纯度钒酸铈,用于同时电化学检测对硝基苯酚和 2,4,6- 三氯苯酚

IF 4.3 3区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY Journal of Physics and Chemistry of Solids Pub Date : 2024-09-26 DOI:10.1016/j.jpcs.2024.112355
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引用次数: 0

摘要

不完整的内亚壳(即 4f)使稀土元素(REE)不同于元素周期表中的其他元素。在镧系元素群中加入一个原子序数,只是在内层 4f 而不是外壳中增加了一个额外的电子。为了证明这一点,我们测试了掺杂钕和铈的钒酸盐,并在改性玻璃碳(GC)电极(GC/CeVO4;NdVO4)上通过电化学方法方便地同时检测对硝基苯酚和 2,4,6-三氯苯酚。在材料制备过程中,开发了简便的单步水热法,制备出的材料(CeVO4)具有较高的结晶度,晶面(200)的平均尺寸为 57.4 nm,且不含任何附加相。GC/CeVO4 电极被用于在 pH5 的布里顿-罗宾逊缓冲溶液中通过 SWV 法同时测定对硝基苯酚(pNP)和 2,4,6-三氯苯酚(TCP)的开创性研究。所开发的评估方法表明,在 2,4,6- 三氯苯酚浓度为 100 μM 的情况下,对硝基苯酚校准图的范围为 0.2 μM 至 100 μM,检测限为 0.058 μM。TCP 校准图包括 0.2 μM 至 60 μM 的浓度范围,在存在 100 μM pNP 的情况下,检测限为 0.111 μM。可在 0.2 μM 至 60 μM 的范围内同时测定 pNP 和 TCP,pNP 的检测限为 0.091 μM,TCP 的检测限为 0.151 μM。在 8 个测量周期内,GC/CeVO4 电极的 pNP 信号偏差为 9.2%,TCP 信号偏差为 11.3%。对 K+、Mg2+、Sr2+、抗坏血酸、柠檬酸、尿素、苯酚、间苯二酚各 10 倍过量的干扰进行了研究,结果表明该电极的信号水平保持率不低于初始值的 75%。将电极用于自来水调查显示,pNP 信号偏差为 15%,而 TCP 信号保持不变。综上所述,GC/CeVO4 电极有望用于评估废水中的芳烃。
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Facile prepared high purity Cerium vanadate for simultaneous electrochemical detection of p-nitrophenol and 2,4,6-trichlorophenol
The incomplete inner subshell (i.e., 4f) makes rare-earth elements (REE) different from other elements in the periodic table. Incorporating an atomic number across the lanthanide group merely adds an extra electron to the inner 4f rather than the outer shell. To prove this, we tested Nd and Ce doped vanadates as facile and convenient way for simultaneous detection of para-nitrophenol and 2,4,6-trichlophenol via the electrochemical way over modified glassy carbon (GC) electrode (GC/CeVO4; NdVO4). For the materials preparation convenient single-step hydrothermal procedure was developed and resulting material (CeVO4) demonstrate high grade of crystallinity with average size through the crystalline plain (200) equal to 57.4 nm and absence of any additional phases. GC/CeVO4 electrode was applied for the pioneering study of simultaneous determination of p-nitrophenol (pNP) and 2,4,6-trichlorophenol (TCP) via the SWV method in Britton-Robinson buffer solution at pH5. The developed method of evaluation demonstrate the span of p-nitrophenol calibration graph in range from 0.2 μM to 100 μM with the detection limit 0.058 μM in the presence of 100 μM of 2,4,6-trichlorophenol. The TCP calibration graph comprise concentrations in range from 0.2 μM to 60 μM with the detection limit 0.111 μM in the presence of 100 μM of pNP. Simultaneous determination of pNP and TCP may be performed in range from 0.2 μM up to 60 μM with the limits of detection equal to 0.091 μM for pNP and 0.151 μM for TCP. GC/CeVO4 electrode demonstrate 9.2 % deviation of pNP signal and 11.3 % of TCP signal deviation within 8 cycles of measurement. Interference study was held with K+, Mg2+, Sr2+, ascorbic acid, citric acid, urea, phenol, resorcinol each taken in 10-fold excess, while the electrode demonstrated retention of signal level not less than 75 % of initial. Application of electrode to tap water investigation had shown the 15 % deviation of pNP signal while the TCP signal stays intact. The abovementioned makes GC/CeVO4 electrode promising for the evaluation of aromatics in wastewaters.
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来源期刊
Journal of Physics and Chemistry of Solids
Journal of Physics and Chemistry of Solids 工程技术-化学综合
CiteScore
7.80
自引率
2.50%
发文量
605
审稿时长
40 days
期刊介绍: The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.
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