Effect of Process Parameters on Crystal Types and Microstructure of TiO₂ Nanocrystalline Powders

Abstract:

TiO₂ nanocrystalline powders were prepared by sol-gel method with different process parameters. The phase, morphology and the luminescent property of TiO₂ nanocrystalline powders were characterized by XRD, SEM and PL, respectively. The results indicated that the synthesized TiO₂ nanocrystalline powders were transformed from anatase into rutile with the increasing of heat treatment temperature, which begin at the temperature of 500 oC and was almost completed at the temperature of 700 oC. And with the increasing of pH value the rutile proportion become larger, the nanograins become fine and powders agglomeration was decreased. The good performance TiO₂ nanocrystalline powders were obtained when prepared temperature was 500°Cand pH value was 4. PL results show broad and strong luminescence band appeared near 470nm when TiO₂ nanocrystalline powders were excited at 325nm at room temperature.

• Periodical: Materials Science Forum (Volume 921)
• Pages: 99-104
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.921.99
• Online since: May 2018
• Authors: Xiao Li Ming, Zhan Hong Ma, Liu Shuan Yang, Feng Zhang Ren*
• Keywords: Heat Treatment Temperature, pH Value, Sol-Gel Method, TiO₂ Nanocrystalline Powders

References

[1] S. G. Kumar, K. S. Rao. Polymorphic phase transition among the titania crystal structures using a solution-based approach: from precursor chemistry to nucleation process, J. Nanoscale, 2014, 6(20):11574-632.

DOI: 10.1039/c4nr01657b

[2] B. O'Regan, M. A. Grätzel. Low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films, J. Nature, 1991, 353(6346): 737-740.

DOI: 10.1038/353737a0

[3] Y. L. Liu, D. D. Wang, J. Ni, et al. Ordered RTiO2@ATiO2 architecture for dye-sensitized solar cell applications, J. Rsc Advances, 2016, 6.

[4] B. K. Mutuma, G. N. Shao, W. D. Kim, et al. Sol-gel synthesis of mesoporous anatase-brookite and anatase-brookite-rutile TiO2 nanoparticles and their photocatalytic properties, J. J Colloid Interface Sci, 2015, 442: 1-7.

DOI: 10.1016/j.jcis.2014.11.060

[5] A. E. Shalan, M. M. Rashad, Y. Yu, et al. Controlling the microstructure and properties of titania nanopowders for high efficiency dye sensitized solar cells, J. Electrochimica Acta, 2013, 89(1):469-478.

DOI: 10.1016/j.electacta.2012.11.091

[6] L. Cano-Casanova, A. Amorós-Pérez, M. Ouzzine, et al. One step hydrothermal synthesis of TiO2, with variable HCl concentration: Detailed characterization and photocatalytic activity in propene oxidation, J. Applied Catalysis B Environmental, (2017).

DOI: 10.1016/j.apcatb.2017.08.060

[7] J. Yu, J. C. Yu et al., Effects of acidic and basic hydrolysis catalysts on the photocatalytic activity and microstructures of bimodal mesoporous titania, J. Journal of Catalysis, 217 (2003) 69-78.

DOI: 10.1016/s0021-9517(03)00034-4

[8] D. Li, X. Cheng, X. Yu, Z. Xing, Preparation and characterization of TiO2 –based nanosheets for photocatalytic degradation of acetylsalicylic acid: Influence of calcination temperature, J. Chemical Engineering Journal, 279 (2015) 994-1003.

DOI: 10.1016/j.cej.2015.05.102

[9] Sahil S, Bhaskar R S, Murty B S. Influence of process parameters on the synthesis of nano-titania by sol–gel route, J. Materials Science & Engineering A, 2007, 452:758-762.

DOI: 10.1016/j.msea.2006.11.005

[10] S. V. Umale, S. N. Tambat, V. Sudhakar, et al. Fabrication, characterization and comparison of DSSC using anatase TiO2 synthesized by various methods, J. Advanced Powder Technology, (2017).

DOI: 10.1016/j.apt.2017.08.012

[11] D. Ulrike. The surface science of titanium dioxide, J. Surface Science Report, 2003, (5): 64-66.

[12] R. R. Bacsa, J. Kiwi. Effect of rutile phase on the photocatalytic properties of nanocrystalline titania during the degradation of p-coumaric acid, J. Applied Catalysis B Environmental, 1998, 16(1):19-29.

DOI: 10.1016/s0926-3373(97)00058-1