MgPc/PHBV复合催化薄膜光催化降解罗丹明B的研究
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摘要
为去除有机污染物罗丹明B(RhB),将四氨基镁酞菁(MgPc)负载到聚羟基丁酸戊酸酯(PHBV)上,制备得到镁酞菁/聚羟基丁酸戊酸酯复合催化薄膜(MgPc/PHBV).加入H_2O_2,研究光催化氧化体系(MgPc/PHBV/H_2O_2)对RhB的光催化降解效果.研究结果表明:MgPc/PHBV和H_2O_2对RhB光催化降解具有很好的协同作用,可见光照3h后RhB(5 mg/L 25 mL,pH=7)的剩余率为32.01%;MgPc/PHBV/H_2O_2体系在光催化降解RhB的过程中产生活性物种羟基自由基和空穴,其中羟基自由基起主要作用.
In order to remove organic pollutant rhodamine B(RhB),tetraaminoph-thalocyanine magnesium(MgPc)was loaded onto polyhydroxy butyrate-co-valerate(PHBV)to prepare composite catalytic thin films MgPc/PHBV in this paper.The photocatalytic effects of photocatalytic oxidation system(MgPc/PHBV/H_2O_2)on RhB were studied in combination with H_2O_2.The experimental results showed that MgPc/PHBV and H_2O_2 had a good synergistic effect on photocatalytic degradation of RhB.After visible light irradiation for 3 hours,the residual rate of RhB(5 mg/L 25 mL,pH=7)was 32.01%.In the process of photocatalytic oxidation of RhB in MgPc/PHBV/H_2O_2 system,the active species,such as hydroxyl radicals and holes,were produced,in which hydroxyl radicals played a major role.
In order to remove organic pollutant rhodamine B(RhB),tetraaminoph-thalocyanine magnesium(MgPc)was loaded onto polyhydroxy butyrate-co-valerate(PHBV)to prepare composite catalytic thin films MgPc/PHBV in this paper.The photocatalytic effects of photocatalytic oxidation system(MgPc/PHBV/H_2O_2)on RhB were studied in combination with H_2O_2.The experimental results showed that MgPc/PHBV and H_2O_2 had a good synergistic effect on photocatalytic degradation of RhB.After visible light irradiation for 3 hours,the residual rate of RhB(5 mg/L 25 mL,pH=7)was 32.01%.In the process of photocatalytic oxidation of RhB in MgPc/PHBV/H_2O_2 system,the active species,such as hydroxyl radicals and holes,were produced,in which hydroxyl radicals played a major role.
引文
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[2]夏雪伟,徐庆锋,路建美,等.金属酞菁配合物的合成及其三阶非线性光学性能研究[J].高校化学工程学报,2007(1):131-135.
[3]陈军,王双青,杨国强.有机金属酞菁类化合物及其非线性光限幅特性[J].物理化学学报,2015,31(4):595-611.
[4]程振华,蔡婷婷,陈际海,等.酞菁金属化合物的合成与应用进展[J].石油化工,2012,41(9):1092-1100.
[5]白青龙,张春花,夏道成,等.酞菁及类酞菁的结构与紫外可见光谱研究[J].材料导报,2010,24(7):61-65.
[6]WANG M,LU W,CHEN D,et al.Synthesis of dendritic-like BiVO4:Ag heterostructure for enhanced and fast photocatalytic degradation of RhB solution[J].Materials Research Bulletin,2016,84:414-421.
[7]ZHANG Z,WEN X,DENG K,et al.Photodegradation of rhodamine B with molecular oxygen catalyzed by a novel unsymmetrical iron porphyrazine under simulated sunlight[J].Catalysis Science&Technology,2013,3(5):1415-1422.
[8]CUI W,WANG H,LIANG Y,et al.Preparation of Ag@AgI-intercalated K4Nb6O17,composite and enhanced photocatalytic degradation of Rhodamine B under visible light[J].Catalysis Communications,2013,36(36):71-74.
[9]KHAN A M,MEHMOOD A,SAYED M,et al.Influence of acids,bases and surfactants on the photocatalytic degradation of a model dye rhodamine B[J].Journal of Molecular Liquids,2017,236:395-403.
[10]葛明.可见光驱动Ag3PO4催化降解罗丹明B和甲基橙[J].催化学报,2014,35(08):1 410-1 417.
[11]ACHAR B N,FOHLEN G M,PARKER J A,et al.Synthesis and structural studies of metal(II)4,9,16,23-phthalocyanine tetraamines[J].Polyhedron,1987,6(6):1 463-1 467.
[12]徐敏虹,王坤燕,潘国祥,等.镁酞菁/PHBV催化薄膜的制备及光催化性能研究[J].功能材料,2017,48(6):6119-6123.