Silica gel-supported porphyrinatoantimony(V) complex acting as visible-light driven photocatalyst for dechlorination of chlorophenols in aqueous solution

In order to develop the photocatalyst operating under visible-light irradiation, silica gel-supported dihydroxo(tetraphenylporphyrinato)antimony(V) complex, [SbTPP(OH)2]+/SiO2, was prepared. The irradiated [SbTPP(OH)2]+/SiO2 particles by fluorescent light induced the dechlorination of chlorophenols in aqueous solution containing Fe(NO3)3 to give Cl ion, 1,4-benzoquinone (BQ), and Fe2+. The [SbTPP(OH)2]+ catalyst supported by Fe3+-impregnated SiO2, [SbTPP(OH)2]+/SiO2-Fe3+, was prepared in order to perform the photochemical dechlorination without the Fe(NO3)3.