Cu-Fe_3O_4磁性纳米复合材料的制备与催化性能研究
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摘要
目的:研究一种可磁分离的高效催化剂用于催化还原对硝基苯酚。方法:采用水热法合成CuFe_3O_4磁性纳米复合材料,通过改变投料比改变Cu的负载量。使用硼氢化钠浸泡法对催化剂进行预处理活化。结果:制得了不同Cu负载量的样品,Cu负载量越多,其催化所需时长越短,催化速率越高。本实验所用的催化剂预处理活化方法显著提高了催化剂的催化活性,经活化后的催化剂催化速率普遍高于已有报道。结论:Cu负载量与催化剂的催化性能成正比。硼氢化钠浸泡的预处理活化方法对提高催化剂的催化活性有显著效果。
Aims:This paper studies a magnetically separable high-efficiency catalyst for the catalytic reduction of p-nitrophenol. Methods: Cu-Fe_3O_4 magnetic nanocomposites were synthesized by the hydrothermal method,and the loading of Cu was changed by changing the feed ratio.Pretreatment activation was done to the catalyst by sodium borohydride immersion.Results:Various Cu loading samples were obtained.The more Cu loading was,the shorter the catalytic duration and the higher the catalytic rate of the catalyst.The pretreatment significantly improved the activity of the catalyst,and the catalytic rate of the activated catalyst was higher than the reported.Conclusions:Cu loading is proportional to the catalytic performance of the catalyst.The pretreatment activation method of sodium borohydride immersion significantly improves catalytic activity.
Aims:This paper studies a magnetically separable high-efficiency catalyst for the catalytic reduction of p-nitrophenol. Methods: Cu-Fe_3O_4 magnetic nanocomposites were synthesized by the hydrothermal method,and the loading of Cu was changed by changing the feed ratio.Pretreatment activation was done to the catalyst by sodium borohydride immersion.Results:Various Cu loading samples were obtained.The more Cu loading was,the shorter the catalytic duration and the higher the catalytic rate of the catalyst.The pretreatment significantly improved the activity of the catalyst,and the catalytic rate of the activated catalyst was higher than the reported.Conclusions:Cu loading is proportional to the catalytic performance of the catalyst.The pretreatment activation method of sodium borohydride immersion significantly improves catalytic activity.
引文
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[2]冯旭东,林屹,瞿福平,等.处理苯胺类稀溶液的萃取置换技术[J].环境科学,2001,22(1):71-74.FENG X D,LIN Y,ZHAI F P,et al.Extraction and replacement technology for treating aniline dilute solution[J].Environmental Science,2001,22(1):71-74.
[3]LI J,LIU C Y,LIU Y.Au/graphene hydrogel:Synthesis,characterization and its use for catalytic reduction of 4-nitrophenol[J].Journal of Materials Chemistry,2012,22(17):8426-8430.
[4]KARIM K,GUPTA S K.Effect of shock and mixed nitrophenolic loadings on the performance of UASB reactors[J].Water Research,2006,40(5):935-942.
[5]魏健,沈常宇,代凯.铒掺杂二氧化钛制备及其光催化性能研究[J].中国计量大学学报,2015,26(1):80-86.WEI J,SHEN C Y,DAI K.Preparation and photocatalytic performance of Er-doped TiO2[J].Journal of China University of Metrology,2015,26(1):80-86.
[6]SHOKRI A,MAHANPOOR K,SOODBAR D.Evaluation of a modified TiO2(GO-B-TiO2)photo catalyst for degradation of 4-nitrophenol in petrochemical wastewater by response surface methodology based on the central composite design[J].Journal of Environmental Chemical Engineering,2016,4(1):585-598.
[7]SAFARI J,GANDOMI-RAVANDI S.Fe3O4-CNTs nanocomposites:A novel and excellent catalyst in the synthesis of diarylpyrimidinones using grindstone chemistry[J].RSCAdvances,2014,4(22):11486-11492.
[8]ZHAO H,YIN F J,XU X Y,et al.A novel catalyst SiO2@NiO for reduction of 4-NP[J].Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry,2007,37(1):15-18.
[9]BEHRENS M,KASATKIN I,KUHL S,et al.PhasePure Cu,Zn,Al hydrotalcite-like materials as precursors for copper rich Cu/ZnO/Al2O3catalysts[J].Chemistry of Materials,2010,22(2):386-397.
[10]WANG Z Z,ZHAI S R,LYU J L,et al.Versatile hierarchical Cu/Fe3O4nanocatalysts for efficient degradation of organic dyes prepared by a facile,controllable hydrothermal method[J].RSC Advances,2015,5(91):74575-74584.
[11]MATHIYARASU J,REMONA A M,MANI A,et al.Exploration of electrodeposited platinum alloy catalysts for methanol electro-oxidation in 0.5M H2SO4:Pt-Ni system[J].Journal of Solid State Electrochemistry,2004,8(12):968-975.
[12]CHIN Y H,KING D L,ROH H S,et al.Structure and reactivity investigations on supported bimetallic Au Ni catalysts used for hydrocarbon steam reforming[J].Journal of Catalysis,2006,244(2):153-162.
[13]GUCZI L,SCHAY Z,STEFLER G,et al.Pumice-Supported Cu-Pd catalysts:Influence of copper on the activity and selectivity of palladium in the hydrogenation of phenylacetylene and But-1-ene[J].Journal of Catalysis,1999,182(2):456-462.
[14]CHANG Y C,CHEN D H.Catalytic reduction of 4-nitrophenol by magnetically recoverable Au nanocatalyst[J].Journal of Hazardous Materials,2009,165(1):664-669.
[15]DUAN M Y,LI J,LI M,et al.Pt(II)porphyrin modified TiO2composites as photocatalysts for efficient 4-NPdegradation[J].Applied Surface Science,2012,258(14):5499-5504.
[16]NGUYEN M T,PIGNEDOLI C A,PASSERONE D.An ab initio insight into the Cu(111)-mediated Ullmann reaction[J].Physical Chemistry Chemical Physics,2011,13(1):154-160.
[17]KEYA L,LAKSHMI K,MASAYUKI S,et al.Gold nanoparticles stabilized on nanocrystalline magnesium oxide as an active catalyst for reduction of nitroarenes in aqueous medium at room temperature[J].Green Chemistry,2012,14(11):3164-3174.
[18]ADAMSKA K,OKAL J,TYLUS W.Stable bimetallic Ru-Mo/Al2O3catalysts for the light alkane combustion:Effect of the Mo addition[J].Applied Catalysis B-Environmental,2019,246:180-194.
[19]WANG D S,LI Y D.Bimetallic nanocrystals:Liquidphase synthesis and catalytic applications[J].Advanced Materials,2011,23(9):1044-1060.
[20]NASROLLAHZADEH M,ATAROD M,SAJADI S M.Green synthesis of the Cu/Fe3O4 nanoparticles using Morinda morindoides leaf aqueous extract:A highly efficient magnetically separable catalyst for the reduction of organic dyes in aqueous medium at room temperature[J].Applied Surface Science,2016,364:636-644.
[21]KOHANTORABI M,GHOLAMI M R.Kinetic analysis of the reduction of 4-nitrophenol catalyzed by CeO2nanorods-supported CuNi nanoparticles[J].Industrial&Engineering Chemistry Research,2017,56(5):1159-1167.
[22]WANG X Y,LU J,ZHAO Y L,et al.Facile fabrication of nickel/heazlewoodite@carbon nanosheets and their superior catalytic performance of 4-nitrophenol reduction[J].ChemCatChem,2018,10(18):4143-4153.
[23]LIU Y Y,ZHAO Y H,ZHOU Y,et al.High-efficient catalytic reduction of 4-nitrophenol based on reusable Ag nanoparticles/graphene-loading loofah sponge hybrid[J].Nanotechnology,2018,29(31):1-12.
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