Tunable synthesis of enhanced photodegradation activity of brookite/anatase mixed-phase titanium dioxide

) with tunable brookite/anataseratios were synthesized via a hydrothermal process. The samples were characterized by x-raydiffractionspectrometry, ultraviolet-visible diffuse reflectance spectrometry, transmission electronmicroscopy, and Brunauer-Emmett-Teller measurement. Photocatalytic degradation of RhodamineB in aqueous solution served as a probe reaction to evaluate the photocatalytic activity of the as-prepared nanocomposites under visible irradiation (k . 400 nm). The mixed-phase TiO