In situ preparation of Ag 3 VO 4 /MOFs composites with enhanced visible-light-driven catalytic activity

In this work, we have fabricated a novel Ag3VO4/MIL-125(Ti) photocatalyst by in situ deposition method, which is characterized by XRD, SEM, TEM, FT-IR, XPS, TG, BET, UV-Vis DRS, and PL. The photocatalytic degradation activity of as-prepared materials was studied via decomposing Rh B, and the possible mechanism of photocatalytic degradation was put forward. The result displayed that the specific surface area of a series of composites is larger than that of the single Ag3VO4 (SBET = 9.374 m2/g), and the photocatalytic efficiency is much higher than that of pure Ag3VO4 and MIL-125(Ti). Among them, the photocatalytic activity of AM-3 composite (SBET = 89.734 m2/g, Eg = 2.13 eV) is the highest, about 3.7 times and 13.1 times of pure Ag3VO4 and MIL-125(Ti), respectively. At the same time, the Ag3VO4/MIL-125(Ti) composite can maintain a stable photocatalytic activity and structure after four cycles.