将四氨基镁酞菁(MgPc)负载到PHBV上制备复合催化薄膜(MgPc/PHBV).采用XRD、FT-IR、TG-DTA和UV-Vis DRS等表征技术对MgPc/PHBV的结构和性质进行表征.结果表明,MgPc和PHBV之间可能通过物理作用结合;MgPc的加入降低PHBV的结晶度;并且将PHBV的分解温度提高20 ℃.基于UV-Vis DRS的测试表明MgPc/PHBV薄膜具有可见光催化活性.此外,MgPc/PHBV光催化降解有机污染物甲基橙的结果表明,光照、MgPc/PHBV和H2O2同时存在时才能催化氧化甲基橙;光照160 min后,甲基橙剩余率为0.0%,甲基橙完全被降解.光催化氧化反应中羟基自由基发挥着关键作用.
The composite catalytic films MgPc/PHBV are prepared by loading MgPc onto the PHBV.The structures and properties of MgPc/PHBV are characterized by XRD, FT-IR, TG-DTA and UV-Vis DRS.The results indicate that MgPc and PHBV may be combined by physical action.Adding MgPc makes the crystallinity of PHBV decrease.In addition, the degradation temperature of PHBV increased 20 ℃ due to MgPc.Tests based on UV-Vis DRS show that the MgPc/PHBV has visible light catalytic activity.Therefore, photocatalytic degradation of organic pollutants methyl orange (MO) with MgPc/PHBV is studied.It is found that MO can only be effectively photocatalytic degradated when light, MgPc/PHBV and H2O2 simultaneously present.The residual rate of MO is 0.0% after 160 min illumination, which means MO is completely degraded.Hydroxyl radicals play a key role in photocatalytic oxidation of MO based on the study of reaction mechanism.
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