以橘子皮为碳源合成的CeO2@C及其对酸性染料去除性能

以Ce(NO₃)₃·6H₂O、橘子皮为原料,利用共沉积法制备氧化铈水合物与橘子皮混合物(CeO₂·xH₂O@OPP),通过在N₂中煅烧CeO₂·xH₂O@OPP获得CeO₂@C复合材料。利用FT-IR、X射线衍射、扫描电镜、拉曼光谱、UV-Vis、X射线光电子能谱、光电流测试方法对合成材料进行了表征。结果表明,CeO₂@C保留了较多的有机官能团,材料内具有较丰富的氧空穴及碳键,Ce、C、O元素均匀分布于材料内。光催化实验结果表明,在CeO₂中引入碳有利于光生电子与空穴分离,提高光电流强度及光催化效率,且CeO₂@C中碳含量对有机染料吸附及光催化效率影响较大。

CeO2@C Synthesized from Orange Peel as Carbon Source and Its Removal Performance for Acid Dyes

Using Ce(NO₃)3·6H₂O,orange peel as raw materials,aqueous ammonia as precipitant,CeO₂·xH₂O@OPP was synthesized via co-deposition method,and then CeO₂@C composites were obtained by the calcination of CeO₂·xH₂O@OPP in N₂.The resulted materials were characterized by FT-IR,X-ray diffraction,scanning electron microscope,Raman spectroscopy,UV-Vis,X-ray photoelectron spectroscopy,and photocurrent techniques.The results showed that Ce,C,O elements were evenly distributed in CeO₂@C with many organic functional groups,abundant oxygen holes,and carbon bonds and that the organic functional groups in CeO₂·xH₂O@OPP,CeO₂·xH₂O,and CeO₂@C were almost similar.The photocatalytic results illustrate that the introduction of C in CeO₂@C is beneficial for the separation of photoelectrons and holes,and thus the improvement of photocurrent and photocatalytic efficiency and that the content of C in the resulted sample can greatly affect the adsorption and photocatalytic efficiency of organic dyes.