Tetragonal phase BaTiO3 was prepared by using hydrothermal calcination,with Ba(OH)2·8H2O and TiO2.g-C3N4 was prepared by using thermal condensation method with melamine as precursor.BaTiO3/g-C3N4 piezo-photocatalytic composites with different mass fractions were prepared by simple lapping.Structure,morphology and optical properties of the samples were characterized by using X-ray diffraction(XRD),scanning electron microscopy(SEM)and UV-vis specoscopy.Properties of the composites were studied by simulating the effect of sunlight and ultrasonic wave on degradation of Rhodamine(RhB).It is found that 10％BaTiO3/g-C3N4 has the best visible light absorption performance,whereas the degradation rate of RhB is 97.81％within 100 min,which is 1.48 times that of g-C3N4.The trapping agent experiment showed that OH and·O2 were the main active species under the conditions of piezo-photocatalysis.
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