결정성에 따른 TiO2 나노입자의 포토루미네선스 영향
The Effect of Crystallinity on the Photoluminescence of TiO2 Nanoparticles
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초록
타이타니아 (TiO2)는 독성이 없고 매우 높은 굴절률, 촉매 활성 및 생체 적합성을 지니고 있으며 화학적 안정성이 있고 높은 이방성을 갖는 저렴한 재료로써 다양한 분야에서 각광받고 있는 세라믹 소재이다. 이러한 TiO2를 sol-gel 법을 이용하여 나노입자화 하였다. 나노입자 형성중에 pH를 조절하여 TiO2의 결정성을 제어하였다. 합성된 나노입자는엑스선 회절분석법, 퓨리에 분광기(Fourier transform infrared), 전계방사형 주사전자현미경(field emission scanning electron microscopy)과 포토루미네선스(photoluminescence spectroscopy)를 이용하여 분석하였다. 합성된 TiO2 나노입자는 5 nm 이하의 크기를 갖는 것을 확인하였다. 나노입자의 결정성이 증가됨에 따라 550 nm 영역의 발광세기가 증가함을확인하였다. 이러한 결과로 TiO2 나노입자의 결정성 조절을 통한 발광 특성 조절을 기대할 수 있다.
Abstract
The Titanium oxide (TiO2) is an attractive ceramic material which shows non-toxic, high refractive index, catalytic activity and biocompatibility, and can be fabricated at a low cost due to its high chemical stability and large anisotropy. TiO2 nanoparticles have been prepared by sol-gel method. The pH of solution can affect the TiO2 crystallinity during the formation of nanoparticles. The prepared nanoparticles were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, photoluminescence spectroscopy in order to investigate their structural and photoluminescence properties. Through these analysis, the size of TiO2 nanoparticles were found to be smaller than 5 nm. As the crystallinity of the nanoparticles increased, the emission of PL in the 550 nm region increased. Therefore, luminescence characteristics can be improved by controlling the crystallinity of the TiO2 nanoparticles.
참고문헌 (28)
- M. Bartic, "Optical and Electrical Properties of TiO2 Thin Films Deposited by Sol-Gel Method", Rev. Roum. Chim, 58, pp.105~ (2013)
- 이태영, "TiO2 나노입자가 혼합된 봉지재를 적용한 LED 패키지의 광효율 특성 평가", 마이크로전자 및 패키징학회지, 21(3), pp.31~35 (2014), 한국마이크로전자및패키징학회[DOI]
- A. L. Linsebigler, "Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results", Chem. Rev, 95, pp.735~ (1995)
- T. L. Thompson, "Surface Science Studies of the Photoactivation of TiO2 New Photochemical Processes", Chem. Rev, 106, pp.4428~ (2006)
- M. Pal, "Size-Controlled Synthesis of Spherical TiO2 Nanoparticles: Morphology, Crystallization, and Phase Transition", J. Phys. Chem. C, 111, pp.96~ (2007)
- 박인성, "이원계 SiO2 와 TiO2 박막의 저항 변화 특성", 마이크로전자 및 패키징학회지, 13(2), pp.15~20 (2006), 한국마이크로전자및패키징학회
- M. D’Arienzo, "Photogenerated Defects in Shape-Controlled TiO2 Anatase Nanocrystals : A Probe to Evaluate the Role of Crystal Facets in Photocatalytic Processes", J. Am. Chem. Soc, 133, pp.17652~ (2011)
- 조태환, "용매열합성을 이용한 구형 TiO2-SiO2 복합체 제조 및 열적특성", 마이크로전자 및 패키징학회지, 12(2), pp.141~147 (2005), 한국마이크로전자및패키징학회
- C. -S. Kim, "Synthesis of Nanocrystalline TiO2 in Toluene by a Solvothermal Route", J. Cryst. Growth, 254, pp.405~ (2003)
- A. Matsuda, "Transparent Anatase Nanocomposite Films by the Sol-Gel Process at Low Temperature", J. Am. Ceram. Soc, 83, pp.229~ (2000)
- L. Chiodo, "Self-energy and excitonic effects in the electronic and optical properties of TiO2 crystalline phases", Phys. Rev. B, 82, pp.045207~ (2010)
- S. Mahshid, "Mixed-Phase TiO2 Nanoparticles Preparation using Sol-Gel Method", J. Alloy. Compd, 478, pp.586~ (2009)
- J. Livage, "Sol–gel chemistry of transition metal oxides", Prog. Solid State Chem, 18, pp.259~ (1988)
- C. Sanchez, "Chemical modification of alkoxide precursors", J. Non-Cryst. Solids, 100, pp.65~ (1988)
- N. Phonthammachai, "Structural and rheological aspect of mesoporous nanocrystalline TiO2 synthesized via sol-gel process", Microporous Mesoporous Mater, 166, pp.261~ (2003)
- S. Mahshid, "Synthesis of TiO2 nanoparticles by hydrolysis and peptization of titanium isopropoxide solution", J. Mater. Proc. Tech, 189, pp.296~ (2007)
- G. Yang, "Enhanced Visible-Light Activity of F-N Co-Doped TiO2Nanocrystals via Nonmetal Impurity, Ti3+ Ions and Oxygen Vacancies", Appl. Surf. Sci, 287, pp.135~ (2013)
- G. Oskam, "The growth kinetics of TiO2 nanoparticles from titanium(IV)alkoxide at high water", titanium ratio, 2003, pp.107, 1734~
- J. Wang, "TiO2nanoparticles with increased surface hydroxyl groups and their improved photocatalytic activity", Catal. Commun, 19, pp.96~ (2012)
- X. Chen, "Properties of Disorder-Engineered Black Titanium Dioxide Nanoparticles through Hydrogenation", Sci. Rep, 3, pp.1510~ (2013)
- M. Salavati-Niasari, "Synthesis of Oleylamine Capped Copper Nanocrystals via Thermal Reduction of a New Precursor", Polyhedron, 28, pp.126~ (2009)
- W. Buraso, "Synthesis of TiO2 nanoparticles via a simple precipitation method and photocatalytic performance", Mater. Res. Express., 5, pp.115003~ (2018)
- S. Kaniyankandy, "Efficient luminescence and photocatalytic behaviour in ultrafine TiO2 particles synthesized by arrested precipitation", J. Mater. Chem, 19, pp.3523~ (2009)
- F. J. Knorr, "Trap-State Distributions and Carrier Transport in Pure and Mixed-Phase TiO2: Influence of Contacting Solvent and Interphasial Electron Transfer", J. Phys. Chem. C, 112, pp.12786~ (2008)
- B. Choudhury, "Tailoring Luminescence Properties of TiO2 Nanoparticles by Mn Doping", J. Lumin, 136, pp.339~ (2013)
- G. Liu, "Carbon dioxide-enhanced photosynthesis of methane and hydrogen from carbon dioxide and water over Pt-promoted polyaniline-TiO2 nanocomposites", Chem. Commun, 51, pp.13654~ (2015)
- A. Stevanovic, "Photoluminescence of TiO2: Effect of UV Light and Adsorbed Molecules on Surface Band Structure", J. Am. Chem. Soc, 134, pp.324~ (2012)
- W. Yuan, "Unveiling the Atomic Structures of the Minority Surfaces of TiO2 Nanocrystals", Chem. Mater, 30(1), pp.288~ (2018)