“…Various methods have been reported in the literature to synthesize these tungstate/molybdate materials, such as impregnation [26,27], peptization [28,29], spray pyrolysis [30], deposition-precipitation [31], electrodeposition [ 32,33], sol-gel [34], hydrothermal reactions [35], solid state [36], and microwave radiation [37]. In this context, it is interesting to develop easy methods for synthesizing these materials under mild conditions.…”