通过简单的醋酸钠与g-C3N4前驱体三聚氰胺共混直接在空气气氛下烧制成功制备出氰基修饰的g-C3N4。采用XRD、SEM、FT-IR、XPS、UV-Vis、PL和EIS对所得催化剂的物相结构、形貌和光学性能进行了表征。合成的氰基修饰的g-C3N4有着高效的光催化产氢性能，比原始g-C3N4的光催化产氢性能最高提高4.5倍(λ≥ 420 nm)，归固于氰基增强了光生电子和空穴的分离能力。另外，氰基修饰的g-C3N4在循环光催化产氢过程中展现了良好的光催化稳定性。

The cyano-modified graphitic carbon nitride (g-C3N4) was successfully synthesized by a facile thermal condensation in air atmosphere using sodium acetate and melamine as precursor. The phase structure，morphology and optical properties of the catalyst were characterized by XRD, SEM, FT-IR, XPS, UV-Vis, PL and EIS. The synthesized cyano-modified g-C3N4 has high-efficient photocatalytic hydrogen production, H2 production rate (λ≥ 420 nm) of cyano-modified g-C3N4 is 4.5 times of that on pristine g-C3N4 because the cyano groups enhance the photo-generated electrons separation ability. Besides, the cyano-modified g-C3N4 exhibits better photocatalytic stability in the repeated photocatalytic hydrogen production process.