▎ 摘　　要

The rGO/Y-TiO2 nanotubes (rGO/Y-TiO2NTs) electrodes with different rGO loading were fabricated by a three-step anodic oxidation, followed by a one-step cyclic voltammetric electrodeposition technique. Field emission scanning electron microscopy (FESEM), X-ray energy dispersive spectrometry (EDS), X-ray diffraction (XRD), UV-Vis diffuse reflection spectrum (UV-Vis DRS) and Raman spectrum were used to characterize the morphology, element composition and crystal form of the samples. Photocurrent responses and the performance of photoelectrocatalytic (PEC) oxidation of ammonia were investigated under 1.0 V bias potential using rGO/Y-TiO2NTs electrodes prepared under different cyclic voltammetric cycle numbers. The results indicated that the highly ordered Y-TiO2NTs possessed the crystal form of anatase phases with high surface area. The smooth and transparent rGO film was electrodeposited on the surface of Y-TiO2NTs. The photoelectrocatalytic efficiency of ammonia using rGO/Y-TiO2NTs electrode was improved by the modification of rGO film, and reached 95.9% in 30 min when the electrodeposition cycle number was 30, which was 1.3 time higher than that of the pristine Y-TiO2NTs electrodes.