【摘 要】
：
The laminated porous N-deficient g-C3N4 (CN –H) is successfully synthesized by a facile two-step hy-drothermal calcination method using oxalic acid-assisted melamine as the precursor. Compared with pristine g-C3N4 (224 μmol g 1 h 1 ), the CN –H shows supe
【机 构】
：
Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, F
论文部分内容阅读
The laminated porous N-deficient g-C3N4 (CN –H) is successfully synthesized by a facile two-step hy-drothermal calcination method using oxalic acid-assisted melamine as the precursor. Compared with pristine g-C3N4 (224 μmol g 1 h 1 ), the CN –H shows superior photocatalytic hydrogen production ac-tivity (up to 728 μmol g 1 h 1 ), which is three times higher than the unmodified counterpart. To draw out the multifaceted influences of oxalic acid modification on the visible-light-induced photocatalytic ac-tivity, various techniques are utilized to investigate the formation mechanism, structural characteristics and photoelectrical properties of CN –H. The results indicate that the addition of a trace amount of oxalic acid to the precursor melamine results in a g-C3N4 structure possessing the advantage of both nitrogen defects and laminated porosity. These properties can enlarge specific surface areas of g-C3N4 , enhance an efficient separating of photogenerated electron-hole pairs and extend the range of spectral response, all contributing to the enhancement of the visible-light-induced photocatalytic activity.
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