Govindasamy Mani, Wang Sea-Fue, Pan Wei Chih, Subramanian Bowya, Ramalingam R Jothi, Al-Lohedan Hamad
Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao East Rd., Taipei 106, Taiwan.
Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao East Rd., Taipei 106, Taiwan.
Ultrason Sonochem. 2019 Sep;56:193-199. doi: 10.1016/j.ultsonch.2019.04.004. Epub 2019 Apr 13.
In this paper, perovskite-type SrTiO nanocubes decorated reduced graphene oxide is synthesized by sonochemical method. The as-synthesized SrTiO@RGO nanocomposite was confirmed by XRD, TEM, SEM, elemental mapping and electrochemical technique. Furthermore, surface morphological and X-ray diffraction studies revealed the formation and high loading of SrTiO nanocubes on reduced graphene oxide matrix. The SrTiO@RGO nanocomposite modified electrode shows an excellent electrochemical detection towards of amino acid (tryptophan). The developed sensor was showed a wide linear range from 30 nM to 917.3 µM and detection limit is 7.15 nM. Furthermore, the sensitivity was calculated to be 9.11 µA µM cm. In addition, the proposed modified sensor is exhibited good selectivity, stability, reproducibility and repeatability. The SrTiO@RGO catalyst modified electrode was successfully applied to tryptophan analysis in biological samples.
在本文中，采用声化学方法合成了钙钛矿型SrTiO纳米立方体修饰的还原氧化石墨烯。通过XRD、TEM、SEM、元素映射和电化学技术对合成的SrTiO@RGO纳米复合材料进行了表征。此外，表面形态和X射线衍射研究揭示了SrTiO纳米立方体在还原氧化石墨烯基体上的形成和高负载量。SrTiO@RGO纳米复合材料修饰电极对氨基酸（色氨酸）具有优异的电化学检测性能。所制备的传感器线性范围宽，为30 nM至917.3 μM，检测限为7.15 nM。此外，计算得到的灵敏度为9.11 μA μM cm。此外，所提出的修饰传感器具有良好的选择性、稳定性、重现性和重复性。SrTiO@RGO催化剂修饰电极成功应用于生物样品中色氨酸的分析。
