Photocatalytic Degradation of Methylene Blue Using Nano-ZnO at Air Lift Circulating Reactor

Hang Xu; Mei Li; Ju Kun Wang

doi:10.4028/www.scientific.net/AMR.476-478.1910

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Photocatalytic Degradation of Methylene Blue Using Nano-ZnO at Air Lift Circulating Reactor

Abstract:

Nano-ZnO powder were prepared through gel-sol method with zinc acetate and lithium hydroxide as crude material. Nano-ZnO was analyzed by XRD, SEM, TEM, UV-Vis and determined photocatalytic activity at photocatalytic reactor. The results show that nano-ZnO has a integrate crystal and its size is 6.6nm with the best photocatalytic performance, when calcined at 350oC. The best ZnO dosage is 0.1g/L with 97% Methylene Blue removal after 30min. Compared with different photocatalytic reactor, the airlift reactor is obviously better than bubbling reactor and stirring reactor.