▎ 摘　　要

It is important to find an effective way to enhance the photocatalytic NO removal efficiency of black-TiO2. In this work, we used a simple hydrothermal method to synthesize the black TiO2-GO composite. One of the black TiO2GO composites, B-TiO2-3GO (black TiO2-GO composites with graphene content of 3 wt%), exhibits remarkably high activity toward the photocatalytic removal of NO, with a NO conversion rate of 50.4% which is greater than that of pure black TiO2 (33.9%). The experimental results revealed that the TiO2-GO nanocomposite photocatalyst has the high absorption ability from large surface area and well mobility of charge carriers, which can enhance its photocatalytic activity. What's more, the UV-vis (DRS)spectra, XPS and NO-TPD-MS indicated that the synergy between H2O2, oxygen vacancies and GO. Finally, a possible photocatalytic NO removal mechanism over the B-TiO2-GO composite is also presented based on the results of the band structures, the free radical capture experiments and electron spin resonance (ESR) tests. This work would provide a strategy to design HNO3/H2O2-resistant deNOx photocatalyst in the pollutant purification field.