Green Synthesis of Flower‐Like BiVO 4 Nanoparticles by Solution Combustion Method Using Lemon ( Citrus Limon ) Juice as a Fuel: Photocatalytic and Electrochemical Study

BiVO 4 have been proven to be one of the most promising photocatalyst for degradation of organic dyes and also exhibit good electrochemical performances in heavy metal detection. Herein, we have developed a simple, economic and low‐cost combustion synthesis of BiVO 4 nanoparticles using bismuth nitrate as an oxidiser, lemon ( Citrus Limon ) juice as fuel. The prepared nanoparticles were characterized by Powder X‐ray diffractometer (PXRD), Fourier Transform‐Infrared spectroscopy (FTIR), Diffused Reflectance Spectroscopy (DRS), Photoluminescence Spectroscopy (PL), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) analytical techniques. Flower‐like morphology BiVO 4 nanoparticles were observed for higher ratio of fuel (Citrus Limon). BiVO 4 nanoparticles showed an excellent photocatalytic activity towards degradation of Indigo Carmine dye in solution. Further, BiVO 4 modified electrode was examined for the detection of Hg (II) using electrochemical techniques.