Abstract
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•A green chemistry route is employed to synthesis LiZnVO4 NPs with Hibiscus Rosa Sinensis leaves.•LiZnVO4 NPs show a very good photocatalytic activity for the degradation of carcinogenic organic dye such as methylene blue.•Electrochemical sensing of Dopamine has shown excellent activity for the detection limit of 6.5 nM.
Based on the semiconductor photocatalytic technique, Photoluminescence and dye degradtion are the important topics in the research. Biosensing is an another most widely studied topic in the highly sensitive detection of analytes. The phenacite LiZnVO4 nanoparticles (NPs) were prepared employing Hibiscus Rosa Sinensis leaves (HRSL) as a novel fuel through green solution combustion method. These NPs were thoroughly characterized using XRD, FT-IR, Raman spectroscopy, UV-DRS, SEM, EDAX, TEM, BET studies and PL spectroscopy. The NPs showed superior photocatalytic degradation activity for the methylene blue dye (MB) under UV light. The enhanced photocatalytic activity is due to the optimum bandgap. These NPs show less rate of electron-hole recombination by emitting green color with the excitation at 334 nm. In addition, the synthesized materials were used as a bio-sensor towards the detection of Dopamine (DA) at a very low concentration. The current evolved sensor was used for the detection of DA with a linear range up to 5 µM, using Cyclic Voltammetry (CV) and Linear Sweep Voltammetry (LSV) and found the detection limit of 6.5 nM. Finally, this method is very simple to prepare the compound in a bulk quantity for large scale industrial applications.