g-C3N4/Bi2MoO6复合光催化剂的制备及性能研究

结合热缩聚法和水热法制备了g-C₃N₄/Bi₂MoO₆复合光催化剂，利用X射线衍射（XRD）、傅里叶红外光谱（FT-IR）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、氮气吸附-脱附曲线、紫外-可见漫反射光谱（UV-Vis DRS）、光致发光光谱（PL）等分析测试技术对材料的结构和性能进行了表征，研究了材料光催化降解罗丹明B（RhB）的效果。结果表明，与纯Bi₂MoO₆相比，g-C₃N₄/Bi₂MoO₆复合材料提高了对可见光的吸收能力，减小了带隙宽度，在可见光激发下提高了降解RhB的光催化活性。其中，5% g-C₃N₄/Bi₂MoO₆复合材料对RhB的降解率最高，在可见光照射180 min对RhB的降解率为93%；而同样条件下Bi₂MoO₆对RhB的降解率为58%。重复性实验表明，复合材料在RhB光降解过程中是稳定的，具有较好的应用潜力。

Study on preparation and properties of g-C3N4/Bi2MoO6 composite photocatalysts

A series of g-C₃N₄/Bi₂MoO₆ composite photocatalysts were synthesized by thermal condensation polymerization and hydrothermal method.The structure and performance of the materials were characterized by using X-ray diffraction（XRD），infrared spectrometer（FT-IR），scanning electron microscopy（SEM），transmission electron microscopy（TEM），N₂ adsorption and desorption process，UV-Vis diffusion reflection spectroscopy（UV-Vis DRS） and photoluminescence spectrum（PL）.The photocatalytic degradation of Rhodamine B（RhB） was studied.The results showed that compared with pure Bi₂MoO₆，the g-C₃N₄/Bi₂MoO₆ composites improved absorbing ability in the visible light region，reduced the band gap width，and exhibited enhanced photocatalytic activity for RhB degradation under visible light irradiation.It was found that the 5% g-C₃N₄/Bi₂MoO₆ composite showed the highest photocatalytic activity for RhB，and the RhB degradation rate was 93% with visible light irradiation of 180 minutes.Under the same circumstances，the Bi₂MoO₆ degradation rate of RhB was 58%.The recovery test showed that the composites were rather stable during the RhB photodegradation，which had better application potential.