Visible Photocatalytic Hydrogen Evolution by g-C(3)N(4)/SrZrO(3) Heterostructure Material

A heterostructure material g-C(3)N(4)/SrZrO(3) was simply prepared by grinding and heating the mixture of SrZrO(3) and g-C(3)N(4). The morphology and structure of the synthesized photocatalysts were determined by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM) and infrared spectra. It showed visible light absorption ability and much higher photocatalytic activity than that of pristine g-C(3)N(4) or SrZrO(3). Under the optimal reaction conditions, the hydrogen production efficiency is 1222 μmol·g(−1)·h(−1) and 34 μmol·g(−1)·h(−1) under ultraviolet light irradiation and visible light irradiation, respectively. It is attributed to the higher separation efficiency of photogenerated electrons and holes between the cooperation of g-C(3)N(4) and SrZrO(3), which is demonstrated by photocurrent measurements.