木材表面g-C3N4的固定及其光降解性能表征

Immobilized of g-C_3N_4 on wood surface and characterization of its photodegradation property

【目的】类石墨相氮化碳(g-C_3N_4)固定于木材表面可减少木材表面有害化学涂饰材料的使用,并赋予木材表面光降解自清洁功能。【方法】通过X射线衍射分析(XRD)、傅里叶红外变换光谱分析(FT-IR)、元素分析、环境扫描电镜分析(SEM)对g-C_3N_4样品及固定效果进行表征。利用光化学反应仪以甲基橙(MO)为目标降解物经行光催化实验,并以紫外分光光度计对样品的光降解效率进行测量。【结果】所合成的含有氨基官能团微米级gC_3N_4固体具有较好的光催化性能;520℃条件下合成的g-C_3N_4具有最佳的光催化性能,复合后木材表面g-C_3N_4的光催化效率虽然低于游离的g-C_3N_4,但仍具有较高的效率。【结论】在实验条件下成功合成了具有较高光催化效率的微米级g-C_3N_4固体,并实现其在木材表面的固定,使木材初步具有了光降解自清洁功能。

【Objective】The graphitic carbon nitride（g-C3N4） was immobilized on wood surface to decrease the use of poisonous chemical coating material in wood surface modification and imparted self-cleaning property to wood products.【Method】The g-C3N4 samples were characterized by Fourier transform infrared spectroscopy（FT-IR）,X-ray diffraction,and elemental analysis（EA）.Their spectral data were consistent with previous reports.The scanning electron microscope（SEM） images showed that the wood surface was coated with g-C3N4.The modified wood surface could degrade MO under visible light.【Result】The synthesized micrometer-scale g-C3N4 with amino groups processed the highly photocatalytic activity.Especially,the g-C3N4 prepared under 520 ℃ had the best performance.Although g-C3N4 immobilized on the wood surface showed a lower photocatalytic activity than free g-C3N4 did,it retained enough efficiency.【Conclusion】We successfully synthesized the g-C3N4 with highly reactivity.The wood surface was imparted self-cleaning property by immobilizedg-C3N4 samples.