印染助剂2024，Vol.41Issue(3)：32-37,6.
基于衰减全反射LED光谱的g-C3N4对亚甲基蓝表面的吸附
Adsorption of methylene blue surface by g-C3N4 based on attenuated total reflection LED spectroscopy
摘要
Abstract
With SiO2 photoconductive fiber as the carrier,g-C3N4 was loaded on the surface of SiO2 opti-cal fiber to form a uniform film by sol-gel method.The samples were characterized by X-ray diffraction(XRD),infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),transient fluorescence spectrosco-py(PL),fluorescence electron microscopy(LSCM),Zeta potential and other characterization techniques.The re-sults showed that g-C3N4 was evenly distributed on the surface of SiO2 optical fiber.After adsorption of meth-ylene blue molecules,the Zeta potential increased from-45.35 mV to-28.72 mV.The absorption peak at 700 cm-1 in FT-IR spectrum moved to 667 cm-1,and the absorption peak at 600 cm-1 disappeared.The typical emission peak of PL spectroscopy decreased significantly,indicating that g-C3N4 had good adsorption capacity for methylene blue molecules.The surface adsorption of methylene blue on g-C3N4 was studied using red LED as light source and photomultiplier tube as detector by using the characteristics of SiO2 optical fiber and the principle of attenuated total reflection spectroscopy.The experimental results were fitted by Freundlich iso-therm adsorption model and Langmuir isotherm adsorption model.The results showed that the adsorption of methylene blue molecules by g-C3N4 was more in line with the Langmuir isothermal adsorption model,which belonged to single-layer adsorption rather than multi-layer adsorption.关键词
衰减全反射LED光谱/g-C3N4/SiO2光导纤维/亚甲基蓝/表面吸附Key words
attenuated total reflection LED spectroscopy/g-C3N4/SiO2 optical fiber/methylene blue/surface adsorption分类
化学化工引用本文复制引用
王思祺,洪雯雯,卜义夫,邵梦莎,李静怡,刘思乐..基于衰减全反射LED光谱的g-C3N4对亚甲基蓝表面的吸附[J].印染助剂,2024,41(3):32-37,6.基金项目
国家级大学生创新训练项目(202313621002) （202313621002）
2023年沈阳科技学院创新创业孵化扶持项目 （）
