Low-cost and rapid synthesis of bismuth, cobalt modified ZnO-GCN nanocomposite was achieved using facile hydrothermal co-precipitation method and ultra sound assisted hydrothermal method for composite formation. The nanocomposite were characterized by advanced techniques such as SET, TEM, XRD, EDAX, FT-IR, UV-DRS etc., and were investigated for water pollution treatment through photodegradation to eliminate xylenol orange organic dye. Characterization revealed the presence of all the dopants in the synthesized material with high purity and good particle size. The nanoparticles were utilized for the solar degradation of xylenol orange organic dye under eco-friendly solar radiation. The optimal degradation parameters were found to be a catalyst dose of 1.5 g L⁻¹, dye concentration of 10 mg L⁻¹, pH of 8, and 180 minutes of solar radiation. The synthesized nanocomposite was effective for dye degradation.
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