Photocatalytic Degradation of Organic Dyes with H3 PW6 Mo6 O40/TiO2-SiO2
YANG Shuijin
PENG Fang
ZHOU Guohui
CHEN Huiyuan
Abstract：In order to remove aquatic organic dye contaminants utilizing the inexpensive and inexhausti‐ble solar energy ,the Keggin‐type H3 PW6 Mo6 O40 was loaded by the specific surface area TiO2‐SiO2 with the impregnation method .The photocatalytic degradation of methyl orange by H3 PW6 Mo6 O40/TiO2‐SiO2 under simulated natural light irradiation was investigated .At the same time ,the influences of the initial methyl orange concentration ,the solution pH and the catalyst dosage on the photocatalytic degradation ratio of methyl orange were also examined .The results demonstratiod that initial concentration of methyl orange was 5 mg/L ,and the catalyst dosage was 0 .9 g/L ,while the pH was 3 .0 .The degradation ratio of the methyl orange could reach to 98 .0% after the light irradiation time of 3 .5 hours .The reaction of photoca‐talysis for methyl orange was the first‐order kinetic model .The photodegradation of methyl viole ,mala‐chitegreen oxalate ,methylene blue ,fuchsin basic and methyl red were also tested ,and the degradation ratio of dyes could achieve 93 .2% ~98 .0% .
Keywords：H3 PW6 Mo6 O40methyl orangeTiO2-SiO2photocatalyticdegradation
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 19-26 )