Novel photosensitive La@TiO2 nanocomposite: A breakthrough in visible-light photocatalysis for oil field water treatment

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A novel visible-light-driven La@TiO 2 composite with enhanced photocatalytic activity was successfully developed via a hydrothermal synthesis method. The La@TiO 2 photocatalyst exhibited exceptional adsorption and photocatalytic degradation capabilities. Langmuir and Bangham's models accurately described the adsorption phenomena observed during pollutant removal. The composite achieved significant removal efficiencies of 70.08 % for NH 3 –N and 55.11 % for COD. UV–vis spectroscopy analysis indicates a band gap energy of 2.48 eV, lower than that of pure TiO 2 thereby facilitating improved photocatalytic performance under visible light. Furthermore, the La@TiO 2 composite demonstrated robust regeneration across three successive testing cycles, highlighting its potential for sustainable wastewater treatment applications. •A novel visible-light-driven La@TiO 2 composite with enhanced photocatalytic activity has been successfully developed. •The La@TiO 2 photocatalyst was synthesized through a hydrothermal method. •The La@TiO 2 demonstrated excellent adsorption and photocatalytic degradation capacity. •Langmuir and Bangham's models precisely describe the adsorption phenomena. •The removal efficiency for NH 3 –N and COD were 70.08 % and 55.11 %.