g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2)光催化剂制备及光催化性能研究  

Preparation and Photocatalytic Properties of g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2) Photocatalyst

作　　者：杨艺 刘明星 杜一萌 丁保宏 YANG Yi;LIU Ming-xing;DU Yi-meng;DING Bao-hong(Liaoning Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《当代化工》2023年第3期633-637,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:21201096)。

摘　　要：以尿素和铁盐为原料,负载了MnO_(2),利用原位沉淀法与煅烧法制备g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2)复合材料。使用XRD、FT-IR、UV-Vis DRS对合成的部分光催化剂进行表征。结果表明:g-C_(3)N_(4)为类石墨的层状结构,Fe_(3)O_(4)和Mn O_(2)通过分子间作用力与g-C_(3)N_(4)复合。在不同反应条件下的可见光诱导的光催化实验表明,当m(Mn)∶m(g-C_(3)N_(4)/Fe_(3)O_(4))=1∶1时,g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2)复合材料具有出色的降解污染物的能力,其中光降解反应的优化条件为g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2)复合材料的剂量为0.4 g,亚甲基蓝的质量浓度为4 mg·L^(-1),温度为25℃,pH=7。经过4次回收和重复使用后,回收率在85%以上,在降解相同的时间(330 min)内降解率能达到83%。g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2) composites were prepared by in situ precipitation with calcination method using urea and iron salts as raw materials and loading MnO_(2).The synthesized partial photocatalysts were characterized using XRD,FT-IR,UV Vis DRS.The results showed that g-C_(3)N_(4) was a graphite like layered structure,and Fe_(3)O_(4) and MnO_(2) were composite with g-C_(3)N_(4) through intermolecular forces.Visible light induced photocatalytic experiments under different reaction conditions showed that g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2)(m(Mn)∶m(g-C_(3)N_(4)/Fe_(3)O_(4))=1∶1)composites exhibited excellent ability to degrade pollutants,the optimized conditions for the photodegradation reaction were as follows:0.4 g g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2) composites,4 mg·L^(-1) methylene blue at 25℃and pH=7.After four recycles and reuses,the recoveries were above 85%,and the degradation rate could reach 83%within the same time(330 min)of degradation.

关 键 词：g-C_(3)N_(4)/Fe_(3)O_(4)/MnO_(2) 复合光催化剂 亚甲基蓝 催化性能 

分 类 号：TQ426[化学工程]