▎ 摘　　要

Two crystalline and nano-sized new Cu(II) MOFs {[Cu(ttpa)(1,3-bdc)(H2O)]center dot CH3OH}(n) (Cu(ttpa)-1) and {[Cu(ttpa)(mip)(H2O)]center dot 2H(2)O} (Cu(ttpa)-2) were prepared and characterized (ttpa = tris(4-(1,2,4-triazol-1-yl) phenyl)amine, 1,3-bdc = 1,3-benzenedicarboxylate, mip = 5-methyl-isophthalate) by hydrothermal method and sonochemical method. Cu(ttpa)-1 and Cu(ttpa)-2 exhibited the 2D network with point symbol {4(4).6(2)}{4(4).6(2)}. The effect of sonicated time, power, frequency and temperature on the morphology of nano-sized Cu(ttpa)-1 and Cu(ttpa)-2 were studied. The MOFs@10%GO composites (GO = graphite oxide) exhibited the highest activities. The catalytic decomposition of methylene blue (MB) using Cu(ttpa)-1, Cu(ttpa)-2, Cu(ttpa)-1@GO and Cu(ttpa)-2@GO composites were examined under visible light and ultrasound. Cu(ttpa)-1, Cu(ttpa)-2, Cu(ttpa)-1@GO and Cu(ttpa)-2@GO exhibited high degradation efficiency. The degradation efficiency of MB for Cu(ttpa)-1@GO was 91.2% at pH = 8 after 15 min visible light irradiation and the photocatalytic rate constant (k) was 0.1165 min(-1). The (OH)-O-center dot hydroxyl radicals and O-center dot(2)- superoxide were the main active matters for catalyst Cu(ttpa)-1@GO and Cu(ttpa)-2@GO in the degradation of MB. Cu(ttpa)-1@GO has the higher catalytic efficiency of degradation of MB than most of MOFs, MOFs composites and inorganic photocatalysts. Cu(ttpa)-1@GO is the good photocatalytic material.