Title : Green method produced Mg embedded WO3@g-C3N4 nanocomposite: A catalyst for water pollutant degradation
Abstract:
In this modern era, water pollution has become a universal problem. Many organic waters materials such as organic dyes are being released from industries, colonies, and our homes. In these organic pollutants Malachite green (MG) is one of them which is very carcinogenic, high toxicity, and susceptible for mutagenicity which has become a momentous environmental concern. Z-scheme type Mg-doped WO3 embedded g-C3N4 a ternary photocatalyst had been produced by green method using Acacia nilotica bark extract to resolve this issue. The physio-chemical investigations of Mg embedded WO3@g-C3N4 ternary nanocomposite (TNC) had been made by HR-TEM, photoluminescence, X-ray diffraction, FE-SEM, EDS, and BET surface area analysis to know the structural, morphological and surface characteristics. The results showed that the configuration of highly crystalline with agglomerated lump-based flakiness and a range of nano-sized crystals in huddled layers with smooth assemblies have been obtained. The spectra shown that the designed Mg doped WO3@g-C3N4 ternary nanocomposite under solar light irradiation, have better photocatalytic activity for MG degradation than undoped g-C3N4 and WO3@g-C3N4 binary composite. The impact of physical parameters like pH, and catalyst dose affected the photo-degradation of MG as well as examined the recyclability up to 4 cycles have also been investigated. The radical scavenging investigations suggested that the main species accountable for the degradation of MG by the Mg embedded WO3@g-C3N4 ternary nanophotocatalyst materials is the •O2– radicals. The higher visible radiation absorption, advanced partition effectiveness of excited e--h+ couples, improved surface area, and the photo-excited electron transfer from g-C3N4 to WO3 bands via Mg can all be contributed to WO3@g-C3N4 nanocomposite’s brilliant photocatalytic recital as well as recyclability.
