In their research featured in Inorganic Chemistry Communications, Abdu et al., delve into the synthesis and optimization of a TiO2-biochar composite for the photocatalytic degradation of Basic Blue 41 dye, a common textile wastewater pollutant. The researchers synthesized the composite using a sol-gel method and meticulously characterized it using techniques like Fourier-transform infrared spectroscopy, BET surface area analysis, X-ray diffraction, and scanning electron microscopy. The study demonstrated that under optimal conditions ,the composite achieved a remarkable 99.6% degradation efficiency for the dye.

The excessive use of synthetic dyes in industries like textile and leather production poses a significant environmental challenge. Many of these dyes end up in water bodies, causing pollution and harming both the environment and human health. Basic Blue 41, a cationic azo dye widely used in the textile industry, is a known environmental hazard due to its deep color and slow biodegradation rate.

Advanced Oxidation Processes (AOPs), particularly those involving heterogeneous photocatalysts, have emerged as promising solutions for dye degradation in wastewater. These catalysts are cost-effective, non-toxic, and offer good stability. Among them, TiO2 is a popular choice due to its high catalytic performance, cost-effectiveness, and abundance. However, TiO2’s wide bandgap limits its use to UV light, which constitutes only a small fraction of sunlight. To overcome this, researchers have explored modifications like metal doping and compositing with other materials.

The study highlights the potential of TiO2-biochar composites in wastewater treatment. BiocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More, a carbonized material derived from biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More waste, has high stability and adsorption capacity, making it an excellent support for TiO2. The composite’s enhanced photocatalytic activity is attributed to the synergistic interaction between TiO2 and biochar, which improves light absorption and charge separation.

This research provides valuable insights into the development of efficient and sustainable materials for wastewater treatment. By effectively degrading harmful dyes like Basic Blue 41, TiO2-biochar composites offer a promising avenue for addressing the growing challenge of textile wastewater pollution.

Source: Abdu, M., Babaee, S., Worku, A., Diale, P., Msagati, T. A. M., & Nure, J. F. (2025). Synthesis and optimization of TiO2-biochar composite for degradation of Basic Blue 41 dye in textile wastewater using response surface methodology. Inorganic Chemistry Communications, 174, 114078. https://doi.org/10.1016/j.inoche.2025.114078