The precursor solution was prepared by sol-gel method using tetrabutyl titanate,copper nitrate and bismuth nitrate as raw materials.The defective Cu-Bi co-doped TiO2 composite photocatalyst was suc-cessfully prepared through drying,mechanical activation(MA)and calcination,the defective Cu-Bi co-doped TiO2 composite photocatalyst was characterized by XRD,SEM,TEM,XPS,BET,and PL,and tetra-cycline hydrochloride(TC)was researched to perform photocatalytic degradation under visible light irradi-ation.The results showed that 96.5％of TC could be degraded within 120 min under the condition of 1％copper-bismuth doping with dosage of 0.25 g/L after 20 min MA treatment.
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