Photodegradation of Rhodamine B and Methyl Orange over Boron-Doped g-C 3 N 4 under Visible Light Irradiation

作者：Shicheng Yan, Z. S. Li, Zhi Zou · 发表于：Langmuir · 年份：2010 · DOI：10.1021/la904023j · 被引用次数：1669 · 研究领域：Advanced Photocatalysis Techniques、Ga2O3 and related materials、MXene and MAX Phase Materials

Graphitic carbon nitride (g-C(3)N(4)) and boron-doped g-C(3)N(4) were prepared by heating melamine and the mixture of melamine and boron oxide, respectively. X-ray diffraction, X-ray photoelectron spectroscopy, and UV-vis spectra were used to describe the properties of as-prepared samples. The electron paramagnetic resonance was used to detect the active species for the photodegradation reaction over g-C(3)N(4). The photodegradation mechanisms for two typical dyes, rhodamine B (Rh B) and methyl orange (MO), are proposed based on our comparison experiments. In the g-C(3)N(4) photocatalysis system, the photodegradation of Rh B and MO is attributed to the direct hole oxidation and overall reaction, respectively; however, for the MO photodegradation the reduction process initiated by photogenerated electrons is a major photocatalytic process compared with the oxidation process induced by photogenerated holes. Boron doping for g-C(3)N(4) can promote photodegradation of Rh B because the boron doping improves the dye adsorption and light absorption of catalyst.