Au@Co-ZIF-8 nanocomposites were fabricated by embedding Au nanoparticles into Co-N-C derived from nitrogen-doped Co-ZIF-8 which used Co(NO3)2·6H2O,Zn(NO3)2·6H2O,2-methylimidazole,diethylenetriamine (DETA) and HAuCl4·4H2O as precursor and diethylenetriamine (DETA) as the connection linker.Their structures were characterized by scanning electron microscope,transmission electron microscopy,X-ray diffraction,and X-ray photoelectron spectroscopy.The catalytic activities of the nanocomposites with respect to methyl orange (MO) were also studied in the presence of NaBH4.The results shown that the Au@Co-N-C had high catalytic activity.In the ultraviolet-visible absorption spectrum,the characteristic absorption peak of MO at 464nm gradually decreased within 6min,the degradation rate was over 90%.And for the degradation of MO,the catalyst can be reused for 8 times,and had good reusability and reproducibility.
[1] Wei Shengjie, Li Ang, Liu Jincheng, et al.Direct observation of noble metal nanoparticles transforming to thermally stable single atoms[J].Nature Nanotechnology, 2018, 13:856-861.
[2] Fu Q, Saltsburg H, Flytzanistephanopoulos M.Active nonmetallic Au and Pt species on ceria-based water-gas shift catalysts[J].Science, 2003, 301(5635):935-938.
[3] Guo X, Fang G, Li G, et al.Direct, nonoxidative conversion of methane to ethylene, aromatics, and hydrogen[J].Science, 2014, 344(6184):616-619.
[4] Siahrostami S, Verdaguer-Casadevall A, Karamad M, et al.Enabling direct H2O2 production through rational electrocatalyst design[J].Nature Materials, 2013, 12(12):1137-1143.
[5] Datye A K, Xu Q, Kharas K C, et al.Particle size distributions in heterogeneous catalysts:what do they tell us about the sintering mechanism？[J].Catalysis Today, 2006, 111(1/2):59-67.
[6] Wang X, Zhuang J, Peng Q, et al.A general strategy for nanocrystal synthesis[J].Nature, 2005, 437(7055):121-124.
[7] Wu Y, Wang D, Li Y.Understanding of the major reactions in solution synthesis of functional nanomaterials[J].Science China Materials, 2016, 59(11):938-996.
[8] Hironori Tsunoyama, Hidehiro Sakurai, Nobuyuki Ichikuni, et al.Colloidal gold nanoparticles as catalyst for carbon-carbon bond formation:application to aerobic homocoupling of phenylboronic acid in water[J].Langmuir, 2004, 20(26):11293-11296.
[9] Tsunoyama H, Sakurai H, Tsukuda T.Size effect on the catalysis of gold clusters dispersed in water for aerobic oxidation of alcohol[J].Chemical Physics Letters, 2006, 429(4/5/6):528-532.
[10] Syzgantseva M A, Ireland C P, Ebrahim F M, et al.Syzgantseva, metal substitution as the method of modifying electronic structure of metal-organic frameworks[J].Journal of the American Chemical Society, 2019, 141:6271-6278.
[11] Park K, Ni Z, Cote A, et al.Exceptional chemical and thermal stability of zeolitic imidazolate frameworks[J].Proceedings of the National Academy of Sciences of the United States of America, 2006, 103(27):10186-10191.
[12] Huang X C, Lin Y Y, Zhang J P, et al.Ligand-directed strategy for zeolite-type metal-organic frameworks:Zinc(Ⅱ) imidazolates with unusual zeolitic topologies[J].Angewandte Chemie International Edition, 2006, 45(10):1557-1559.
[13] Yang J, Zhang F, Lu H, et al.Hollow Zn/Co ZIF particles derived from core-shell ZIF-67@ZIF-8 as selective catalyst for the semi-hydrogenation of acetylene[J].Angewandte Chemie International Edition, 2015, 54(37):10889-10893.
[14] Liu B, Shioyama H, Akita T, et al.Metal-organic framework as a template for porous carbon synthesis[J].Journal of the American Chemical Society, 2008, 130(16):5390-5391.
[15] Chen G, Song J, Zhang H, et al.Pd nanoparticles encapsulated in magnetic carbon nanocages:an efficient nanoenzyme for the selective detection and multicolor imaging of cancer cells[J].Nanoscale, 2015, 7(34):14393-14400.
[16] Venna S R, Zhu M, Li S, et al.Knudsen diffusion through ZIF-8 membranes synthesized by secondary seeded growth[J].Journal of Porous Materials, 2014, 21(2):235-240.
[17] Nagy L T, Hu Ming, Yuichiro Kamachi, et al.Facile synthesis of nanoporous carbons with controlled particle sizes by direct carbonization of monodispersed ZIF-8 crystals[J].Chemical Communications, 2013, 49(25):2521-2523.
[18] Hong, Jiang, Qing, et al.Synthesis of Pd@ZIF-8 via an assembly method:influence of the molar ratios of Pd/Zn2+ and 2-methylimidazole/Zn2+[J].Microporous & Mesoporous Materials, 2016, 225:33-40.
[19] Zuo W, Chen G, Chen F, et al.Green synthesis and characterization of gold nanoparticles embedded into magnetic carbon nanocages and their highly efficient degradation of methylene blue[J].RSC Advances, 2016, 6(34):28774-28780.
[20] Samanta S, Satyabadi S M, Parida K.Facile synthesis of Au/g-C3N4 nanocomposites:an inorganic/organic hybrid plasmonic photocatalyst with enhanced hydrogen gas evolution under visible-light irradiation[J].Chem Cat Chem, 2014, 6(5):1453-1462.
[21] Li H L, Gao Y, Xiong Z, et al.Enhanced selective photocatalytic reduction of CO2 to CH4 over plasmonic Au modified g-C3N4 photocatalyst under UV-Vis light irradiation[J].Applied Surface Science, 2018, 439:552-559.
[22] Jiang H L, Liu B, Akita T, et al.Au@ZIF-8∶CO oxidation over gold nanoparticles deposited to metal-organic framework[J].Journal of the American Chemical Society, 2009, 131(32):11302-11303.
[23] Yang Y, Wang S Q, Wen H, et al.Nanoporous gold embedded ZIF composite for enhanced electrochemical nitrogen fixation[J].Angewandte Chemie International Edition, 2019, 58(43):15362-15366.
[24] Gong J, Mullins C B.Surface science investigations of oxidative chemistry on gold[J].Accounts of Chemical Research, 2009, 42(8):1063-1073.
[25] Ju Y, Li X, Feng J, et al.One pot in situ growth of gold nanoparticles on amine-modified graphene oxide and their high catalytic properties[J].Applied Surface Science, 2014, 316:132-140.
[26] Junejo Y, Sirajuddin, Baykal A, et al.A novel green synthesis and characterization of Ag NPs with its ultra-rapid catalytic reduction of methyl green dye[J].Applied Surface Science, 2014, 290:499-503.
[27] Zeng T, Zhang X L, Ma Y R, et al.A novel Fe3O4-graphene-Au multifunctional nanocomposite:green synthesis and catalytic application[J].Journal of Materials Chemistry, 2012, 22(35):18658-18663.
[28] Zuo W, Chen G, Chen F, et al.Green synthesis and characterization of gold nanoparticles embedded into magnetic carbon nanocages and their highly efficient degradation of methylene blue[J].RSC Advances, 2016, 6(34):28774-28780.
[29] Paul B, Bhuyan B, Purkayastha D D, et al.Green synthesis of gold nanoparticles using Pogestemon benghalensis (B) O.Ktz.leaf extract and studies of their photocatalytic activity in degradation of methylene blue[J].Materials Letters, 2015, 148:37-40.
[30] Feng J, Ruimin L, Jianhua C, et al.Ultrasmall Pd/Au bimetallic nanocrystals embedded in hydrogen-bonded supramolecular structures:facile synthesis and catalytic activities in the reduction of 4-nitrophenol[J].Journal of Materials Chemistry A, 2015, 3(38):19433-19438.
基金资助
国家自然科学基金(21761019)
PDF
