Nb2O5-Graphene나노복합체의 제조 및유기염료 광촉매 분해반응의 응용성에 관한 연구 = Preparation of Nb2O5-Graphene Nanocomposites and Their Application in Photocatalytic Degradation of Organic Dyes

국문 초록 (Abstract)

Niobium pentoxide (Nb2O5) 나노입자는 niobium (V) chloride 와 pluronic F108NF를 전구체와 주형제로사용하여 합성하였다. Nb2O5-graphene나노복합체는 아르곤 가스 분위기 전기로 조건에서 2시간 동안 700 ℃로가열하였다. 시료의 결정화도, 결정형태, 광촉매 분해 반응성은 X-ray diffraction, scanning electron microscopy,transmission electron microscopy, UV-vis spectroscopy를 사용하여 측정하였다. Nb2O5-graphene나노복합체는 254 nm의 자외선 조건에서 유기염료 광촉매 분해 반응의 광촉매로 사용되었다. 유기염료는 methylene blue(MB), methyl orange (MO), rhodamine B (RhB), brilliant green (BG)이 사용되었다. 또한 Nb2O5-graphene나노복합체를 사용하여 유기염료 광촉매 분해 반응의 반응 속도를 결정하였다.

다국어 초록 (Multilingual Abstract)

Niobium pent oxide (Nb2O5) nanoparticles were synthesized using niobium (V) chloride and pluronic F108NFas the precursor and templating agent, respectively. The Nb2O5-graphene nanocomposites were placed in an electric furnaceat 700 °C and calcined under Ar atmosphere for 2 h. The morphology, crystallinity, and photo catalytic degradation activity of the samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and UV-vis spectroscopy. The Nb2O5-graphene nanocomposites acted as a photo catalyst in the photo catalytic degradation of organic dyes under 254 nm UV light; the organic dyes used were methylene blue (MB), methyl orange (MO), rhodamineB (RhB), and brilliant green (BG). The photo catalytic degradation kinetics for the aforesaid dyes were determined in the presence of the Nb2O5-graphene nanocomposites.

참고문헌 (Reference)

1 S. Srivastava, "Toxicological Effects of Malachite Green" Aquat. Toxicol 66 : 319 ~, 2004

2 A. K. Geim, "The rise of graphene" Nat. Mater 6 : 183 ~, 2007

3 D. Zander, "The Catalytic Effect of Nb2O5 on the Electrochemical Hydrogenation of Nanocrystalline Magnesium" J. Alloys Compd 413 : 298 ~, 2006

4 S. K. Hong, "Synthesis of [60]Fullerene-ZnO Nanocomposite under Electric Furnace and Photocatalytic Degradation of Organic Dyes" J. Nanosci. Nanotechnol 11 : 6049 ~, 2011

5 N. Kumagai, "Structural Changes of Nb2O5 and V2O5 as Rechargeable Cathodes for Lithium Battery" Electrochim. Acta 28 : 17 ~, 1983

6 S. I. Ito, "Strong Rhodium–Niobia Interaction in Rh/Nb2O5, Nb2O5–Rh/SiO2 and RhNbO4/ SiO2 Catalysts: Application to Selective CO Oxidation and CO Hydrogenation" Catal. Today 57 : 247 ~, 2000

7 C. Berberidou, "Sonolytic, Photocatalytic and Sonophotocatalytic Degradation of Malachite Green in Aqueous Solutions" Appl. Catal. B-Environ 74 : 63 ~, 2007

8 J. Liu, "Single-crystalline nanoporous Nb2O5 nanotubes" Nanoscale Res. Lett 6 : 138 ~, 2011

9 S. Furukawa, "Reaction Mechanism of Selective Photooxidation of Hydrocarbons over Nb2O5" J. Phys. Chem. C 115 : 19320 ~, 2011

10 B. H. Cho, "Preparation of Graphene-ZrO2Nanocomposites by Heat Treatment and Photocatalytic Degradation of Organic Dyes" J. Nanosci. Nanotechnol 13 : 7625 ~, 2013

11 K. Ouyang, "Photocatalytic activity of TiO2 supported on multi-walled carbon nanotubes under simulated solar irradiation" Ceram. Int 39 : 7531 ~, 2013

12 C. Liu, "Photocatalytic Degradation of Waste Activated Sludge Using a Circulating Bed Photocatalytic Reactor for Improving Biohydrogen Production" Bioresour. Technol 125 : 30 ~, 2012

13 U. G. Akpan, "Parameters Affecting the Photocatalytic Degradation of Dyes Using TiO2-Based Photocatalysts: A review" J. Hazard. Mater 170 : 520 ~, 2009

14 Z. Xu, "One Step Synthesis of Polyacrylamide Functionalized Graphene and Its Application in Pb(II)Removal" Appl. Surf. Sci 316 : 308 ~, 2014

15 B. Mortazavi, "Nitrogen Doping and Curvature Effects on Thermal Conductivity of Graphene: A Non-Equilibrium Molecular Dynamics study" Solid State Commun 152 : 261 ~, 2012

16 I. Nowak, "Niobium Compounds: Preparation, Characterization, and Application in Heterogeneous Catalysis" Chem. Rev 99 : 3603 ~, 1999

17 A. G. S. Prado, "Nb2O5 as Efficient and Recyclable Photocatalyst for Indigo Carmine Degradation" Appl. Catal. B-Environ 82 : 219 ~, 2008

18 B. Varghese, "Nb2O5 Nanowires as Efficient Electron Field Emitters" J. Phys. Chem. C 112 : 10008 ~, 2008

19 A. L. Viet, "Nanostructured Nb2O5 Polymorphs by Electrospinning for Rechargeable Lithium Batteries" J. Phys. Chem. C 114 : 664 ~, 2010

20 F. Hashemzadeh, "Mesoporous Nanostructures of Nb2O5 Obtained by an EISA Route for the Treatment of Malachite Green Dye-Contaminated Aqueous Solution under UV and Visible Light Irradiation" Ceram. Int 40 : 9817 ~, 2014

21 T. Shishido, "Mechanism of Photooxidation of Alcohol over Nb2O5" J. Phys. Chem. C 113 : 18713 ~, 2009

22 F. D. Franco, "Light Induced Electropolymerization of Poly (3,4-ethylenedioxythiophene)on Niobium Oxide" Electrochim. Acta 56 : 737 ~, 2010

23 Z. J. Yang, "Layered Niobic Acid with Self Exfoliatable Nanosheets and Adjustable Acidity for Catalytic Hydration of Ethylene Oxide" J. Catal 280 : 247 ~, 2011

24 K. S. Novoselov, "Electric Field Effect in Atomically Thin Carbon Films" Science 306 : 666 ~, 2004

25 S. Danwittayakula, "Efficient solar photocatalytic degradation of textile wastewater usingZnO/ZTO composites" Appl. Catal. B-Environ 163 : 1 ~, 2015

26 Y. Gogotsi, "Controlling Graphene Properties Through Chemistry" J. Phys. Chem. Lett 2 : 2509 ~, 2011

27 A. Dato, "Clean and Highly Ordered Graphene Synthesized in the Gas Phase" Chem. Commun 152 : 6095 ~, 2009