고압 균질기를 통해 합성된 이산화망간 나노입자에 의한 일산화탄소의 촉매적 산화
Catalytic Oxidation of CO over Manganese Dioxide Nanoparticles Synthesized Using a High Pressure Homonizer
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In this study, manganese dioxide (MnO2) nanoparticles were synthesized from KMnO4 and MnCl2·4H2O without any dispersing agents and oxidant via ultra-high pressure homogenization process. We investigated various physicochemical properties and CO oxidation reactions of the MnO2 nanoparticles as a function of the number of passes at 1,500 bar in a high pressure homogenizer nozzle. The observed X-ray diffraction patterns and scanning electron microscopy images revealed that the synthesized MnO2 nanoparticles had a hexagonal structure and a uniform spherical shape. It was found from the Brunauer-Emmett-Teller measurements that the pore size of the MnO2 nanoparticles ranged from 23.6 to 7.2 nm and their specific surface area ranged from 24 to 208 m2g-1. In particular, it was confirmed from the measurements of CO conversion into CO2 that CO oxidation reaction over the MnO2 nanoparticles exhibited excellent catalytic activity at low temperatures below 100 ℃.
Abstract
In this study, manganese dioxide (MnO2) nanoparticles were synthesized from KMnO4 and MnCl2·4H2O without any dispersing agents and oxidant via ultra-high pressure homogenization process. We investigated various physicochemical properties and CO oxidation reactions of the MnO2 nanoparticles as a function of the number of passes at 1,500 bar in a high pressure homogenizer nozzle. The observed X-ray diffraction patterns and scanning electron microscopy images revealed that the synthesized MnO2 nanoparticles had a hexagonal structure and a uniform spherical shape. It was found from the Brunauer-Emmett-Teller measurements that the pore size of the MnO2 nanoparticles ranged from 23.6 to 7.2 nm and their specific surface area ranged from 24 to 208 m2g-1. In particular, it was confirmed from the measurements of CO conversion into CO2 that CO oxidation reaction over the MnO2 nanoparticles exhibited excellent catalytic activity at low temperatures below 100 ℃.
참고문헌 (30)
- 이영호, "수열방법으로 합성된 이산화망간의 물리화학적 특성과 일산화탄소 산화반응", Clean Technology, 21(4), pp.248~256 (2015), 한국청정기술학회[DOI]
- 박정현, "망간 산화물 촉매상에서 일산화탄소의 산화반응 : 소성온도의 영향", Clean Technology, 17(1), pp.41~47 (2011), 한국청정기술학회
- S. F. Chen, "Large scale photochemical synthesis of M@TiO2 nanocomposites (M = Ag, Pd, Au, Pt) and their optical properties, CO oxidation performance, and antibacterial effect", Nano Res, 3, pp.244~255 (2010)
- M. S. Chen, "Highly active surfaces for CO oxidation on Rh, Pd, and Pt", Surf. Sci, 601, pp.5326~5331 (2007)
- M. Haruta, "Low-Temperature Oxidation of CO over Gold Supported on TiO2, α-Fe2O3, and Co3O4", J. Catal, 144, pp.175~192 (1993)
- V. Shapovalov, "Catalysis by doped oxides : CO oxidation by AuxCe1-xO2", J. Catal, 245, pp.205~214 (2007)
- J. Xu, "Biphasic Pd-Au Alloy Catalyst for Low-Temperature CO Oxidation", J. Am. Chem. Soc, 132, pp.10398~10406 (2010)
- J. Y. Park, "Tuning of Catalytic CO Oxidation by Changing Composition of Rh-Pt Bimetallic Nanoparticles", Nano Lett, 8, pp.673~677 (2008)
- H. -K. Lin, "Synthesis, Characterization and Catalytic Oxidation of Carbon Monoxide over Cobalt Oxide", Catal. Lett, 88, pp.169~174 (2003)
- J. Jansson, "Low-Temperature CO Oxidation over Co3O4", Al2O3, 2000, pp.194, 55~60
- X. Xie, "Low-temperature oxidation of CO catalysed by Co3O4 nanorods", Nature, 458, pp.746~749 (2009)
- K. Rida, "Bimetallic Co-Fe and Co-Cr oxide systems supported on CeO2 : Characterization and CO oxidation catalytic behavior", Int. J. Hydrogen Energy, 40, pp.11267~11278 (2015)
- L. Cai, "The effect of doping transition metal oxides on copper manganese oxides for the catalytic oxidation of CO", Chinese J. Catal, 35, pp.159~167 (2014)
- Z. -D. Tan, "Metal-Organic Framework MIL-53(Al)-Supported Copper Catalyst for CO Catalytic Oxidation Reaction", Inorg. Chem. Commun, 61, pp.128~131 (2015)
- Y. Zhao, "MnO2 Nanosheets Grown on the ZnO-Nanorod-Modified Carbon Fibers for Supercapacitor Electrode Materials", Colloid. Surface. A : Physicochem. Eng. Aspects, 444, pp.232~239 (2014)
- U. M. Patil, "A Facile Synthesis of Hierarchical α-MnO2 Nanofibers on 3D-Graphene Foam for Supercapacitor Application", Mater. Lett, 119, pp.135~139 (2014)
- Chung-Hsien Wu, "Effects of reducing agents on the electrochemical properties of the prepared manganese oxide powders", Current Applied Physics, 12(4), pp.1058~1063 (2012), 한국물리학회[DOI]
- Y. Lv, "Facile synthesis and Electrochemical Properties of MnO2", carbon Nanotubes, 2014, pp.15, 34~38
- E. R. Stobbe, "The Reduction and Oxidation Behaviour of Manganese Oxides", Catal. Today, 47, pp.161~167 (1999)
- Chung-Liang Chang, "Applying spray pyrolysis to synthesize MnOx for decomposing isopropyl alcohol in ozone- and thermal-catalytic oxidation", Korean Journal of Chemical Engineering, 26(4), pp.1047~1052 (2009), 한국화학공학회
- Y. S. Lee, "Oxidation Characteristics of Low Concentration CO Gas by the Natural Manganese Dioxide(NMD)in a Fixed Bed", Clean Technol, 2, pp.60~68 (1996)
- P. Botkovitz, "Structural and Electrochemical Characteristics of a Hollandite-type LiXMnO2", J. Power. Sources, 43-44, pp.657~665 (1993)
- Q. Feng, "Manganese Oxide Porous Crystals", J. Mater. Chem, 9, pp.319~333 (1998)
- P. Barboux, "The Use of Acetates as Precursors for the Low-Temperature Synthesis of LiMn2O4 and LiCoO2Intercalation Compounds", J. Solid State Chem, 94, pp.185~196 (1991)
- R. Koksbang, "Cathode Materials for Lithium Rocking Chair Batteries", Solid State Ionics, 84, pp.1~21 (1996)
- K. Burapapadh, "Pectin-Based Nano-Sized Emulsions Prepared by High-Pressure Homogenization", Adv. Mater. Res, 506, pp.286~289 (2012)
- A. A. Nagi, "Tamoxifen Drug Loading Solid Lipid Nanoparticles Prepared by Hot High Pressure Homogenization Techniques", Am. J. Pharm. Toxicol, 3, pp.219~224 (2008)
- J. H. Cho, "Facile depolymerization process of β-glucan through the use of a high pressure homogenizer", Am. J. Res. Comm, 4, pp.168~178 (2014)
- 지성화, "고압 균질기의 압력이 마그네타이트 나노입자의 자기 특성에 미치는 영향", 한국자기학회지, 26(6), pp.190~195 (2016), 한국자기학회
- L. Jin, "Suib, γ-MnO2 octahedral molecular sieve:Preparation, characterization, and catalytic activity in the atmospheric oxidation of toluene", Appl. Catal. A, 355, pp.169~175 (2009)