The Preparation Of Hybrid Catalysts Based On 6,13-Pentacenequinone And Application In The Degradation Of Pollutants In Solution

Pollution by organic compounds and heavy metals had dramatically increased nowadays,with the development and growth of anthropogenic、agricultural and industrial activities.Dye pollution caused by industrial activities and the pollution of chemical fertilizers and pesticides do harm to human health.Hence,it was necessary to develop a technology to overcome the problem of pollution.The common and most efficient way for the reduction of pollution is to introduce NaBH4 as a reductant and a nobel metal catalyst.All of the nobel metal catalyst showed an excellent catalytic activity even at lowtemperature.However,the disadvantage was that nobel metal catalyst were expensive and easily caused secondly pollution.Photocatalyst had attracted considerable attention because it was stable,efficient and has no secondary pollution.Illuminated by the previous studies,the research purposes of this thesis was to synthesize Ag-PQ composites and Ag-PQ(EDA)composites;use this nanocomposites as the catalyst to reduce pendimethalin,and synthesize PQ-ZnO composites and Ag2S/Ag@MoS2 as the photocatalyst for the degradation of MB.Meanwhile,The SERS activity of the Ag2S/Ag@MoS2 nanocomposites was evaluated by using R6G as a probe molecule.The detailed information were shown as follows:(1)PQ was fabricated by a solid phase method process,then AgNPs were successfully grown on the surface of PQ.Ag-PQ composites were characterized by XRD、UV-vis、BET and TEM.We investigated the relationship between mass ratio of Ag-PQ(EDA)and the catalytic efficiency of the reduction of pendimethalin.Most importantly,Ag-PQ could be used as an active catalyst for reduction of pendimethalin in a liquid environment.(2)Used DMF、H4N2·H2O、NH3-H2O、C2H5OH、C2H8N2 as the inductive agent to induce the self-assembly of PQ.Then the new product was characterized by FT-IR and SEM.Then AgNPs were successfully grown on the surface of PQ(EDA).Ag-PQ(EDA)composites were characterized by XRD、XPS、SEM and TEM.We investigated the relationship between mass ratio of Ag-PQ(EDA)and the catalytic efficiency of the reduction of pendimethalin,and Ag-PQ(EDA)composites shown a better catalytic activity than Ag-PQ composites.(3)The coupled semiconductor photocatalysts of 6,13-pentacenequinone/ZnO(PQ/ZnO)with different weight ratios were prepared.The prepared catalyst was characterized with various spectroscopic methods such as FT-IR、XRD、SEM、TEM、DRS and EIS.The photocatalytic property of the PQ/ZnO composites was studied with MB.Among all PQ/ZnO composites,10%PQ was best photocatalyst for the degradation of MB.(4)The prepared catalyst was characterized with various spectroscopic methods.We designed a two-step and rapid approach toward synthesize Ag2S/Ag@MoS2 nanocomposites.The structure and morphology of Ag2S/Ag@MoS2 nanocomposites were characterized by XRD、XPS、SEM and TEM.The SERS property of the Ag2S/Ag@MoS2 nanocomposites was studied with R6G.The photocatalytic performance of Ag2S/Ag@MoS2 nanocomposites was evaluated by the degradation of MB as model pollutants.These Ag2S/Ag@MoS2 nanocomposites had demonstrated high performance for both sensitive SERS detection and photocatalytic degradation.