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Fabrication of a Greener TiO2@Gum Arabic-Carbon Paste Electrode for the Electrochemical Detection of Pb2+ Ions in Plastic Toys
ACS Omega ( IF 3.7 ) Pub Date : 2020-09-24 , DOI: 10.1021/acsomega.0c03781 Saranya Kothaplamoottil Sivan 1 , Sarojini Sharath Shankar 2 , Sajina N 1 , Akshaykumar Kandambath Padinjareveetil 3 , Rajendra Pilankatta 2 , V B Sameer Kumar 2 , Beena Mathew 4 , Bini George 1 , Pooyan Makvandi 5, 6 , Miroslav Černík 7 , Vinod V T Padil 7 , Rajender S Varma 8
ACS Omega ( IF 3.7 ) Pub Date : 2020-09-24 , DOI: 10.1021/acsomega.0c03781 Saranya Kothaplamoottil Sivan 1 , Sarojini Sharath Shankar 2 , Sajina N 1 , Akshaykumar Kandambath Padinjareveetil 3 , Rajendra Pilankatta 2 , V B Sameer Kumar 2 , Beena Mathew 4 , Bini George 1 , Pooyan Makvandi 5, 6 , Miroslav Černík 7 , Vinod V T Padil 7 , Rajender S Varma 8
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A novel greener methodology is reported for the synthesis of titanium dioxide (TiO2) nanoparticles (NPs) using gum Arabic (Acacia senegal) and the characterization of the ensuing TiO2 NPs by various techniques such as X-ray diffraction (XRD), Fourier transform infrared, Raman spectroscopy, scanning electron microscopy–energy dispersive X-ray, transmission electron microscopy (TEM), high resolution-TEM, and UV–visible spectroscopy. The XRD analysis confirmed the formation of TiO2 NPs in the anatase phase with high crystal purity, while TEM confirmed the size to be 8.9 ± 1.5 nm with a spherical morphology. The electrode for the electrochemical detection of Pb2+ ions was modified by a carbon paste fabricated using the synthesized TiO2 NPs. Compared to the bare electrode, the fabricated electrode exhibited improved electro–catalytic activity toward the reduction of Pb2+ ions. The detection limit, quantification limit, and the sensitivity of the developed electrode were observed by using differential pulse voltammetry to be 506 ppb, 1.68 ppm, and 0.52 ± 0.01 μA μM–1, respectively. The constructed electrode was tested for the detection of lead content in plastic toys.
中文翻译：
制备更环保的 TiO2@Gum 阿拉伯碳糊电极，用于电化学检测塑料玩具中的 Pb2+ 离子
据报道，一种新颖的绿色方法用于使用阿拉伯树胶（塞内加尔金合欢）合成二氧化钛 (TiO 2 ) 纳米颗粒 (NP)，并通过 X 射线衍射 (XRD)、傅立叶等各种技术表征随后的 TiO 2纳米颗粒变换红外、拉曼光谱、扫描电子显微镜-能量色散 X 射线、透射电子显微镜 (TEM)、高分辨率 TEM 和紫外-可见光谱。 XRD分析证实了TiO 2 NPs在锐钛矿相中形成，具有高晶体纯度，而TEM证实其尺寸为8.9±1.5 nm，具有球形形态。用于电化学检测Pb 2+离子的电极通过使用合成的TiO 2 NPs制造的碳糊进行修饰。与裸电极相比，制备的电极表现出改善的Pb 2+离子还原电催化活性。使用差示脉冲伏安法观察所开发的电极的检测限、定量限和灵敏度分别为506 ppb、1.68 ppm和0.52 ± 0.01 μA μM –1 。构建的电极用于检测塑料玩具中的铅含量。
更新日期：2020-10-06
中文翻译：
制备更环保的 TiO2@Gum 阿拉伯碳糊电极，用于电化学检测塑料玩具中的 Pb2+ 离子
据报道，一种新颖的绿色方法用于使用阿拉伯树胶（塞内加尔金合欢）合成二氧化钛 (TiO 2 ) 纳米颗粒 (NP)，并通过 X 射线衍射 (XRD)、傅立叶等各种技术表征随后的 TiO 2纳米颗粒变换红外、拉曼光谱、扫描电子显微镜-能量色散 X 射线、透射电子显微镜 (TEM)、高分辨率 TEM 和紫外-可见光谱。 XRD分析证实了TiO 2 NPs在锐钛矿相中形成，具有高晶体纯度，而TEM证实其尺寸为8.9±1.5 nm，具有球形形态。用于电化学检测Pb 2+离子的电极通过使用合成的TiO 2 NPs制造的碳糊进行修饰。与裸电极相比，制备的电极表现出改善的Pb 2+离子还原电催化活性。使用差示脉冲伏安法观察所开发的电极的检测限、定量限和灵敏度分别为506 ppb、1.68 ppm和0.52 ± 0.01 μA μM –1 。构建的电极用于检测塑料玩具中的铅含量。
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