The growing pollution of antibiotics poses a significant threat to the ecol. environment and human health.Photocatalysis is a promising solution for eliminating tetracycline (TC), but developing efficient photocatalysts remains a critical and challenging task.Herein, TiO2 nanodispersion is first used for the removal of TC in water.The as-prepared TiO2 nanodispersion has a uniform size of 10 nm and a large sp. surface area of 198.9 m2/g, exhibiting notable adsorption capacity, exceptional photocatalytic performance, and considerable stability.Under UV light, TiO2 nanodispersion achieved 100 % degradation of TC within 60 min, using less than 1/5 of the catalyst dosage typically applied in most studies, and exhibited the highest catalytic activity, reaching 500 mgTC•gcatalyst-1h-1.Addnl., the photocatalytic rate constant of TiO2 nanodispersion was 2.74 times higher than com. P25.After five photocatalytic cycles, the catalyst maintained a high degradation efficiency of 94 %.Even under visible light, the degradation efficiency of TC by TiO2 nanodispersion was approx. 90 % within 20 min, which was notably higher than that of P25 (63 %).Moreover, the as-prepared TiO2 nanodispersion demonstrated outstanding photocatalytic degradation ability for other typical antibiotics (chlortetracycline, oxytetracycline, and ciprofloxacin), demonstrating its potential as an efficient photocatalyst for the treatment of antibiotic wastewater.