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竹节状多壁碳纳米管-聚（丙烯酸-co-衣康酸）/NaOH 复合水凝胶的合成及其对电化学检测镉（II）的潜在应用。

Synthesis of Bamboo-like Multiwall Carbon Nanotube-Poly(Acrylic Acid-co-Itaconic Acid)/NaOH Composite Hydrogel and its Potential Application for Electrochemical Detection of Cadmium(II).

机构信息

División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, A.C. (IPICYT), Camino a la Presa San José 2055, Lomas 4ª Sección, San Luis Potosí C.P. 78216, SLP, Mexico.

Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Manuel Nava No. 6, San Luis Potosí C.P. 78210, Mexico.

出版信息

Biosensors (Basel). 2020 Oct 19;10(10):147. doi: 10.3390/bios10100147.

DOI:10.3390/bios10100147
PMID:33086517
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7603206/
Abstract

A poly(acrylic acid-co-itaconic acid) (PAA-co-IA)/NaOH hydrogel containing bamboo-type multiwall carbon nanotubes (B-MWCNTs) doped with nitrogen (PAA-co-IA/NaOH/B-MWCNTs) was synthesized and characterized by SEM, absorption of water, point of zero charges, infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. The possible use of the PAA-co-IA/NaOH/B-MWCNT hydrogel as an electrode modifier and pre-concentrator agent for Cd(II) sensing purposes was then evaluated using carbon paste electrodes via differential pulse voltammetry. The presence of the B-MWCNTs in the hydrogel matrix decreased its degree of swelling, stabilized the structure of the swollen gel, and favored the detection of 3 ppb Cd(II), which is comparable to the World Health Organization's allowable maximum value in drinking water. A calibration curve was obtained in the concentration range of 2.67 × 10 to 6.23 × 10 M (i.e., 3 and 70 ppb) to determine a limit of detection (LOD) of 19.24 μgL and a sensitivity of 0.15 μC ppb. Also, the Zn(II), Hg(II), Pb(II) and Cu(II) ions interfered moderately on the determination of Cd(II).

摘要

一种含有氮掺杂竹节型多壁碳纳米管（B-MWCNTs）的聚（丙烯酸-co-衣康酸）（PAA-co-IA）/NaOH 水凝胶（PAA-co-IA/NaOH/B-MWCNTs）被合成并通过 SEM、吸水、零电荷点、红外光谱、热重分析和差示扫描量热法进行了表征。然后，通过使用碳糊电极通过差分脉冲伏安法评估了 PAA-co-IA/NaOH/B-MWCNT 水凝胶作为电极修饰剂和 Cd(II)感测用预浓缩剂的可能用途。B-MWCNTs 在水凝胶基质中的存在降低了其溶胀度，稳定了溶胀凝胶的结构，并有利于检测 3 ppb Cd(II)，这与世界卫生组织在饮用水中允许的最大值相当。在 2.67 × 10 到 6.23 × 10 M 的浓度范围内获得了校准曲线（即 3 和 70 ppb），以确定检测限（LOD）为 19.24 μgL 和灵敏度为 0.15 μC ppb。此外，Zn(II)、Hg(II)、Pb(II)和 Cu(II)离子对 Cd(II)的测定有适度干扰。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/b4484a2d2a21/biosensors-10-00147-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/cc1fbc3d9340/biosensors-10-00147-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/a66ac5c7344e/biosensors-10-00147-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/da946ccfa4d6/biosensors-10-00147-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/05cedd58f138/biosensors-10-00147-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/abe5fffc6289/biosensors-10-00147-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/44cc7d291007/biosensors-10-00147-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/eac4987bc835/biosensors-10-00147-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/b2a7880097e8/biosensors-10-00147-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/b4484a2d2a21/biosensors-10-00147-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/cc1fbc3d9340/biosensors-10-00147-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/a66ac5c7344e/biosensors-10-00147-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/da946ccfa4d6/biosensors-10-00147-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/05cedd58f138/biosensors-10-00147-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/abe5fffc6289/biosensors-10-00147-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/44cc7d291007/biosensors-10-00147-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/eac4987bc835/biosensors-10-00147-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/b2a7880097e8/biosensors-10-00147-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5198/7603206/b4484a2d2a21/biosensors-10-00147-g009.jpg

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