Yazhini Priya Subbarayalu, Nagapandiselvi Perumal
The design and development of an efficient photocatalyst for the degradation of dye effluent is a tactical strategy for advancing environmental remediation. In this regard, a novel g-C 3 N 5 /Ni-UiO-66 nanocomposite has been successfully synthesized via an inexpensive and simple hydrothermal method. The structural analysis exposed the successful formation of the composite, while the morphological analysis revealed particle-like morphology for Ni-UiO-66 and a sheet-like structure for g-C 3 N 5 . The comprehensive physicochemical characterization was carried out to evaluate the properties of the prepared materials. The coupling of g-C 3 N 5 and Ni-UiO-66 significantly enhances the visible light absorption, as confirmed through UV–visible analysis and increased surface area, as evidenced from BET measurements. These synergetic effects resulted in enhanced photocatalytic activity compared to that of their pristine materials. The photocatalytic degradation response of the prepared nanocomposite with different ratios was evaluated against indigo carmine (IC) dye and industrial textile effluent (ITE). Among the various compositions, the optimal ratio exhibited the highest photodegradation efficiencies of 99.3% for IC dye and 88.5% for ITE, respectively. Furthermore, key water quality parameters like TOC, TDS, BOD, COD, pH, color, turbidity, salinity, and conductivity were assessed to demonstrate the practical applicability of the treatment process for industrial wastewater.