▎ 摘　　要

The reduced graphene oxide (RGO) doped tungsten trioxide/molybdenum trioxide (WO3/MoO3) composite powders were successfully prepared by simple co-precipitation method with the difference RGO concentrations. The effect RGO on crystal structure, optical properties, and the photochromic properties were investigated. The synthesized composite powders having the mixed phase between h-WO3 and amorphous, high defect concentration and band gap energy varying from 2.83 eV to 3.15 eV depended on the mixture composition can be stimulated by UV or visible light and change the color from white or light gray to deep blue. The composite film was prepared by casting synthesized powders that dispersed in polymer matrix and their photochromic properties under UV irradiation were studied by the color difference (Delta C) measured by means of colorimeter. The 1.3x10(-3) wt% RGO-doped WO3/MoO3 composite films show good color change that can turn to dark blue after irradiation and can return to the original color about 94% within 10 min by heating at 80 degrees C. The films exhibit high stability of photochromic performance after repeated tests.