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A series of cobalt ferrite/cadmium oxide (CFO/CO) hetero-junctions were synthesized via an ultra-sonication approach. The compositions were examined based on ferroelectric, optical and photo-catalytic properties. X-ray diffraction (XRD), UV–visible (UV–Vis) spectroscopy and photo-luminescence (PL) were employed for the characterization of the prepared materials. XRD analysis confirmed a distorted cubic phase with space group fm3m and grain size was in 17.6–19.2 nm range. The ferroelectric parameters were enhanced significantly by the addition of CO (CdO) into the CFO (CoFe 2 O 4) crystal lattice. The band-gap energy was decreased significantly of hetero-junctions from 3.29 to 2.54 eV. The enhanced ferroelectric polarization with low band-gap energy boosts their ferroelectric and optical responses. A reduction in PL intensity was observed in hetero-junctions. The photo-catalytic activity (PCA) of CFO and cobalt ferrite/cadmium oxide (1–4) hetero-junctions CFO/CO (1–4) was examined by photo-degradation of Methylene Blue (MB) dye under visible light exposure. The CFO/CO4 photo-catalyst exhibited superior PCA of 92% within 90 min irradiation. Additionally, photo-catalyst dose and pH effect on the kinetics of MB dye degradation was also examined. Superior PCA of CFO/CO4 in comparison to pure CFO makes this material a promising candidate for the removal of hazardous dyes in effluents under visible light irradiation. [ABSTRACT FROM AUTHOR]

Plastic pollution has become a major environmental problem because it does not break down and poses risks to ecosystems and human health. This study focuses on the environmentally friendly synthesis of ZnO nanocubes using an extract from Ceropegia omissa H. Huber plant leaves. The primary goal is to investigate the viability of these nanocubes as visible-light photocatalysts for the degradation of bisphenol A (BPA). The synthesized ZnO nanocubes have a highly crystalline structure and a bandgap of 3.1 eV, making them suitable for effective visible-light photocatalysis. FTIR analysis, which demonstrates that the pertinent functional groups are present, demonstrates the chemical bonding and reducing processes that take place in the plant extract. The XPS method also studies zinc metals, oxygen valencies, and binding energies. Under visible light irradiation, ZnO nanocubes degrade BPA by 86% in 30 min. This plant-extract-based green synthesis method provides a long-term replacement for traditional procedures, and visible light photocatalysis has advantages over ultraviolet light. The study's results show that ZnO nanocubes may be good for the environment and can work well as visible light photocatalysts to break down organic pollutants. This adds to what is known about using nanoparticles to clean up the environment. As a result, this study highlights the potential of using environmentally friendly ZnO nanocubes as a long-lasting and efficient method of reducing organic pollutant contamination in aquatic environments. • Environmentally friendly synthesis of ZnO nanocubes using an extract from Ceropegia omissa H. Huber plant leaves. • ZnO nanocubes have a highly crystalline structure and a bandgap of 3.1 Ev. • Under visible light irradiation, ZnO nanocubes degrade BPA by 86% in 30 min to mitigate the Water Pollution. • An innovative addressing towards sustainable environment for mitigation of water pollution. [ABSTRACT FROM AUTHOR]