<p>With the rapid development of industries and residential areas, increased pollution caused by toxic effluents from industries and lack of proper waste water treatment pose severe health threats to all living beings. Specifically, methylene blue dye, which is most commonly used in textile, cosmetics and paper industries, tends to get accumulated in water bodies and are not easily degraded in natural environments. This accumulation of methylene blue dye in water bodies is toxic to both aquatic and terrestrial ecosystems urging the need for research in advanced materials that aids in the degradation of methylene blue dye. Recently, there has been another serious threat caused by a pharmaceutical drug not disposed properly. Tetracycline is a common antibiotic used in the treatment of bacterial infections. Tetracycline contamination negatively affects the growth and survival of aquatic beings and exposure to higher dosages negatively impacts the health of human beings. Our study aims to treat methylene blue dye and tetracycline using an eco-friendly biochar derived from banana peel wastes. Biochar was incorporated with metal oxide nanorods under hydrothermal conditions with the aid of an acid modulator to form a nanocomposite. These metal oxide nanorods incorporated biochar was characterized for its surface morphology, surface area, crystallinity, elemental composition, and band gap. The metal oxide nanorods-incorporated biochar material was then screened for its activity in the treatment of toxic effluents such as dyes and pharmaceutical waste degradation. The material was able to photocatalytically degrade the toxic methylene blue dye and tetracycline drug with higher degradation efficiency under visible light conditions. Furthermore, the electrochemical characterization for both the metal oxide nanorods and metal oxide nanorods-incorporated biochar nanocomposite was conducted using an electrochemical workstation to study their potential application as an electrochemical supercapacitor. The areal capacitance was also calculated in this study. This work thus offers an insight into the multifunctional behaviour of the BiVO₄@Biochar and also helps one understand the effect on photocatalytic behaviour and improvement of capacitance of Bismuth vanadate with the incorporation of the biochar.</p>