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Ordered macro/mesoporous SnS 2 /TiO 2 composite was successfully prepared via a template-free aqueous technique using tetrabutyl titanate as the titanium precursor and SnCl 4 •5H 2 O as the tin precursor. The photocatalytic activity of SnS 2 /TiO 2 composite was tested by the degradation of Methyl Orange (MO) aqueous solution under irradiation of the simulated sunlight. It was found that SnS 2 /TiO 2 composite displayed an enhanced photocatalytic activity with a 0.055 min −1 apparent rate constant (degradation efficiency of 90.9% within 50 min). The ordered macro/mesoporous structure and SnS 2 /TiO 2 heterostructure were considered to play synergistic effects in its enhanced photocatalytic performance, because the ordered porous structure can improve mass transfer and light capture, and heterostructure between SnS 2 and TiO 2 can reduce the recombination rate of photogenerated electrons and holes. [ABSTRACT FROM AUTHOR]