Self-assembly of rutile (α-TiO2) nanoclusters into nanorods in microemulsions at low temperature and their photocatalytic performance
Source abstract
Abstract
A novel method – inverse microemulsion has been developed not only for synthesizing low cost TiO2 nanocrystals but also for the first time making these nanocrystals self-assemble into various nanoparticles at 85°C. By variation of the volume ratios of oil to water in reverse microemulsions, the morphologies of obtained samples turned from nanoclusters to nanospherules, then grew into nanodumbbells, and became nanorods at last. It could be observed by transmission electron microscope (TEM) directly. The resulting materials were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and high-resolution transmission electron microscope (HRTEM). The photocatalytic activity of TiO2 was tested with photodegradation of Methyl Orange (MO) in water. The catalyst consisting of nanorods showed the highest photocatalytic activity, which is due to its large surface area. Furthermore, the mechanism of self-assembly of TiO2 nanocrystals was discussed in detail.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: TiO2 Photocatalysis and Solar Cells · Advanced Photocatalysis Techniques · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (18)
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1. Barringer E.A. & H.K. Bowen, 1985. High-purity, monodisperse TiO2 powders by hydrolysis of titanium tetraethoxide. 1. Synthesis and physical properties. Langmuir. 1, 414–420.10.1021/la00064a005 ↗
2. Bose S. & S.K. Saha, 2003. Synthesis and characterization of hydroxyapatite nanopowders by emulsion technique. Chem. Mater. 15, 4464–4469.10.1021/cm0303437 ↗
3. Hopwood J.D. & S. Mann, 1997. Synthesis of barium sulfate nanoparticles and nanofilaments in reverse micelles and microemulsions. Chem. Mater. 9, 1819–1828.10.1021/cm970113q ↗
4. Jana N.R., L.A. Gearheart, S.O. Obare, C.J. Johnson, K.J. Edler, S. Mann & C.J. Murphy, 2002. Liquid crystalline assemblies of ordered gold nanorods. J. Mater. Chem. 12, 2909–2912.10.1039/b205225c ↗
5. Kim F., S. Kwan, J. Akana &P. Yang, 2001. Langmuir-Blodgett nanorod assembly. J. Am. Chem. Soc. 123, 4360–4361.10.1021/ja0059138 ↗
6. Li M., H. Schnablegger & S. Mann, 1999. Coupled synthesis and self-assembly of nanoparticles to give structures with controlled organization. Nature. 402, 393–395.10.1038/46509 ↗
7. Li Y., Y. Fan & Y.J. Chen, 2002. A novel method for preparation of nanocrystalline rutile TiO2 powders by liquid hydrolysis of TiCl4. J. Mater. Chem. 12, 1387–1390.10.1039/b200018k ↗
8. Park H.K., Y.T. Moon, D.K. Kim & C.H. Kim, 1996. Formation of monodisperse spherical TiO2 powders by thermal hydrolysis of Ti(SO4)2. J. Am. Ceram.Soc. 79, 2727–2732.10.1111/j.1151-2916.1996.tb09038.x ↗
9. Park I.S., S.R. Jang, J.S. Hong, R. Vittal & K.J. Kim, 2003. Preparation of composite anatase TiO2 nanostructure by precipitation from hydrolyzed TiCl4 solution using anodic alumina membrane. Chem. Mater. 15, 4633.10.1021/cm030541y ↗
10. Park S.D., Y.H. Cho, W.W. Kim & S.J. Kim, 1999. Understanding of homogeneous spontaneous precipitation for monodispersed TiO2 ultrafine powders with rutile phase around room temperature. J. Solid State. Chem. 146, 230–238.10.1006/jssc.1999.8342 ↗
11. Peng X., L. Manna, W. Yang, J. Wickham, E. Scher, A. Kadavanich & .P. Alivisatos, 2000. Shape control of CdSe nanocrystals. Nature. 404, 59–61.10.1038/35003535 ↗
12. Polleux J., N. Pinna, M. Antonietti & M. Niederberger, 2004. Ligand-directed assembly of preformed titania nanocrystals into highly anisotropic nanostructures. Adv. Mater. 16, 436–439.10.1002/adma.200306251 ↗
13. Rogach A.L., D.V. Talapin, E.V. Shevchenko, A. Kornowski, M. Haas & H. Weller, 2002. Organization of matter on different size scales: Monodisperse nanocrystals and their superstructures. Adv. Funct. Mater. 12, 653–664.10.1002/1616-3028(20021016)12:10<653::AID-ADFM653>3.0.CO;2-V ↗
14. Tadros T.F., 1984. Surfactants. Academic Press Inc., London.
15. Walsh D. & S. Mann, 1996. Chemical synthesis of microskeletal calcium phosphate in bicontinuous microemulsions. Chem. Mater. 8, 1944.10.1021/cm9601345 ↗
16. Wang W., B.H. Gu, Liang L.Y, W.A. Hamilton & D.J. Wesolowski, 2004. Synthesis of rutile (α-TiO2) nanocrystals with controlled size and shape by low-temperature hydrolysis: effects of solvent composition. J. Phys. Chem. B. 108, 14789.10.1021/jp0470952 ↗
17. Xia Y., P. Yang, Y. Sun, Y. Wu, B. Mayers, B. Gates, Y. Yin, F. Kim & H. Yan, 2003. One-dimensional nanostructures: synthesis, characterization, and applications. Adv. Mater.,15, 353–389.10.1002/adma.200390087 ↗
18. Yan M., F. Chen, J. Zhang & M. Anpo, 2005. Preparation of controllable crystalline titania and study on the photocatalytic properties. J. Phys. Chem. B. 109, 8673.10.1021/jp046087i ↗