In this research, ethylene glycol-introduced solvothermal method was employed to fabricate a novel sphere-like CuBiO material to improve the adsorptive and photocatalytic performance of conventional CuBiO. A series of characterization has been applied to investigate properties of the obtained CuBiO (CBO-EG3). Compared with conventional rod-like CuBiO (CBO), the synthesized sphere-like CBO-EG3 exhibited rough surface, larger specific surface area, and more effective separation of photo-generated carriers, which overcome main shortcomings of CuBiO. The removal efficiency of typical antibiotic sulfamethazine (SMZ) reached almost 100% under the optimal experimental conditions. About 70% of SMZ could be adsorbed in 180-min dark reaction, with residual being photodegraded in 30 min. CBO-EG3 showed much higher photocatalytic efficiency than pure CBO, attributing to its highly effective photo-induced electron and hole separation. Meanwhile, substantial adsorption of pollutant on CBO-EG3 contributed vastly to removal of SMZ, photo-generated electrons and holes inclined to react with adsorbed SMZ directly, and photocatalytic process was mainly led by non-radical reaction. Elimination of SMZ in actual water samples and recycling experiment were also performed to evaluate CBO-EG3's practical application potential. This study delivered a method to promote CuBiO's adsorptive and photocatalytic ability, which could expand the application of CuBiO in wastewater treatment.
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