Enhancing the photo-electrocatalytic properties of g-C3N4 by boron doping and ZIF-8 hybridization
Mahmood Riyadh AttaMaizatul Shima ShaharunMd. Maksudur Rahman KhanBawadi AbdullahAkram Fadhl Al-MahmodiNur Diyan Mohd RidzuanThurga Devi MunusamyJun Wei Lim
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Polymer/graphene quantum dots (PGQDs) composite electrochemical sensors are used for the detection of glucose. The PGQDs composite were synthesized by situ chemical oxidation polymerization method. The optical properties was studied by UV-Visible spectroscopy, the surface morphology by Field emission scanning electron microscopy (FESEM), the electrochemical performance and glucose detection were investigated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) reveals that PGQDs nanocomposite shows the enhanced electrocatalytic activity towards the oxidation and reduction and which enhances the electrochemically catalytically current during cyclic voltammetry. It exhibits the stable electrochemical sensors for detection glucose and good agreement with regression value R2=0.965.
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The interactions of Meldola's Blue(MB) and DNA were studied by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS).A couple of cyclic voltammetric peaks of MB decreased after MB interacted with dsDNA in the solution.The interaction between MB and dsDNA was an electrostatic mode.While MB interacted with ssDNA or dsDNA modified on the glassy carbon electrode,the peak currents of MB increased and the formal potential shifted negatively.Based on cyclic voltammetry,the binding constants of MB and ssDNA or dsDNA modified on the electrodes were determined to be 3.4×103 L·mol-1 and 5.2×103 L·mol-1,respectively.The electrostatic interaction existed between MB and surface-immobilized ssDNA,and both electrostatic and intercalative interactions occurred between MB and surface-immobilized dsDNA,which implied that MB might be used as a potential electrochemical DNA hybridization indicator.The experimental result of EIS was in consistent with that of CV.
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