Cu2Og-C3N4微球的合成及性质研究VIP免费

Cu2O/g-C3N4微球的合成及性质研究摘要本文采用使用煅烧法制备了g-C3N4纳米材料，并使用超声分散法和回流法制备了Cu2O/g-C3N4纳米复合材料。采用X射线衍射分析（XRD）研究了g-C3N4和Cu2O/g-C3N4的晶体结构，使用扫描电子显微镜（SEM）研究了g-C3N4和Cu2O/g-C3N4的形貌，采用傅里叶红外光谱（FTIR）和紫外光谱（UV）研究了g-C3N4和Cu2O/g-C3N4的的化学结构。使用循环伏安研究了g-C3N4和Cu2O/g-C3N4的循环稳定性。实验和表征结果表明：Cu2O与g-C3N4面面接触，两相间化学作用强烈；Cu2O/g-C3N4催化剂能有效利用太阳光，电子-空穴得到有效分离；当n（Cu2O）∶n（g-C3N4）=5∶1时，Cu2O/g-C3N4催化剂的活性最佳，在可见光下反应30min时，甲基橙降解率达84.1%；Cu2O/g-C3N4具有较好的活性稳定性，重复使用6次，甲基橙降解率降至64.7%；电子-空穴是Cu2O/g-C3N4光催化降解甲基橙的主要活性物种。关键词：Cu2O；g-C3N4；纳米复合；光催化AbstractInthispaper，g-C3N4nanomaterialswerepreparedbycalcinationmethod，andCu2O/g-C3N4nanocompositeswerepreparedbyultrasonicdispersionmethodandrefluxmethod.Thecrystalstructuresofg-C3N4andCu2O/g-C3N4werestudiedbyX-raydiffraction(XRD).Themorphologyofg-C3N4andCu2O/g-C3N4wasstudiedbyscanningelectronmicroscopy(SEM).Fourierinfraredwasused.Thechemicalstructuresofg-C3N4andCu2O/g-C3N4wereinvestigatedbyFTIRandUV.Thecyclicstabilityofg-C3N4andCu2O/g-C3N4wasinvestigatedusingcyclicvoltammetry.TheexperimentalandcharacterizationresultsshowthatCu2Oisincontactwithg-C3N4，andthechemicalinteractionbetweenthetwophasesisstrong.TheCu2O/g-C3N4catalystcaneffectivelyutilizesunlight，andtheelectron-holeiseffectivelyseparated.Whenn(Cu2O)：n(g-C3N4)=5：1，theactivityofCu2O/g-C3N4catalystisthebest.Whenreactedfor30minundervisiblelight，thedegradationrateofmethylorangeis84.1%;Cu2O/g-C3N4hasgoodactivitystability.Afterrepeatedusefor6times，thedegradationrateofmethylorangedecreasedto64.7%;electron-holewasthemainactivespeciesofphotocatalyticdegradationofmethylorangebyCu2O/g-C3N4.Keywords：Cu2O；g-C3N4；Nanocomposite；Photocatalytic目录摘要............................................................................................................................1Abstract..........................................................................................................................1..............................................................................................................................................7.....................................................................................................................7............................................7...............................................7..........................................8.........................................8...................................................8..........................................10....................................................10.....................................................10.............................................10..........................................................11............................................11..................................................11........................................................................................................................................14..................................................14..................................................14..................................................14............................................