TiO2-Bi2WO6/Zn(CH3COO)2-ACF(TBZA)composite was prepared by hydrothermal and impregnation-sol-gel method,its morphology and structure of the composite were characterized by SEM,TEM,XRD,BET,UV-vis and I-T photocurrent response,and the degradation of propane in the adsorption-desorption coupling photocatalytic reactor was investigated.The results showed that the prepared materials had good photoelectron-hole separation rate.In the three-stage series adsorption-desorption coupled photocatalytic reactor,the propane mass concentration was 1 000 mg/m3,the flow rate was 1.2 m3/h,the humidity was 33％,and the temperature was 34 ℃.The photocatalytic efficiency of TBZA composite was 85.8％,which was 48.9 percentage points higher than that of a single reactor,and the overall propane conversion decreased by less than 2％when the desorption temperature was 65 ℃ under ultraviolet irradiation,indicating that TBZA material had good performance as catalyst for recycling.
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