Sono-synthesis of CuxO/Fe2O3/MoC nano-hybrid: evaluation of digital camera as portable colorimetric device for low cost detection of organic dyes in water media

In this study, CuxO/Fe2O3/MoC nano-hybrid was synthesized by sono-assisted reverse-precipitation method using bath sonicator and compared with prepared sample using magnetically stirred rout. It was used for the removal of reactive dyes. The synthesized nano-hybrids were characterized by X-ray diffraction (XRD) analysis, field emission scanning electron microscopy (FESEM), Fourier-transform infrared spectroscopy (FTIR). The removal data showed that the ultrasonically synthesized nano-hybrids are more effective than stirrer synthesized nano-hybrids and also it has a meaningful influence on removal of RY84 and RR198. The kinetic and adsorption isotherm studies have shown that the best models are Ho‘s pseudo-second order and Langmuir model, respectively. A colorimetric method according to RGB value was used for determination of dye concentration in water media. The image was taken by a smartphone and the pictures were analyzed by Image j software. The accuracy of RGB results was confirmed by a UV–vis spectrophotometer. .