Fig. 1. X-ray diffraction patterns (A), Raman spectra (B), UV/vis diffuse reflectance spectra (C), the corresponding optical bandgaps (D), N2 adsorption–desorption isotherms (E) and the corresponding pore size distribution plots (F) of mesoporous rutile/anatase TiO2 microspheres after calcination at different temperatures under a hydrogen atmosphere.
