Synthesis and optical characterization of porous ZnO
Open Access
- 7 September 2013
- journal article
- Published by Tsinghua University Press in Journal of Advanced Ceramics
- Vol. 2 (3), 260-265
- https://doi.org/10.1007/s40145-013-0069-6
Abstract
In this paper, a simple and cheap method to prepare porous ZnO by using zinc nitrate, ethanol and triethanolamine (TEA) is reported. The as-prepared sample consisted of nano and micro pores. The sample was calcined at 300 °C, 400 °C and 500 °C with different heating rates. At 500 °C, the nano pores disappeared but the sample maintained its micro porosity. Field emission scanning electron microscopy (FE-SEM) pictures confirmed that the size and growth of ZnO nanoparticles depended on the heating conditions. The infrared (IR) absorption peak of Zn-O stretching vibration positioned at 457 cm−1 was split into two peaks centered at 518 cm−1 and 682 cm−1 with the change of morphology. These results confirmed that Fourier transform infrared (FT-IR) spectrum was sensitive to variations in particle size, shape and morphology. The photoluminescence (PL) spectrum of porous ZnO contained five emission peaks at 397 nm, 437 nm, 466 nm, 492 nm and 527 nm. Emission intensity enhanced monotonously with increase of temperature and the change was rapid between temperatures of 300 °C and 500 °C. This was due to the elimination of organic species and improvement in the crystallanity of the sample at 500 °C.Keywords
This publication has 19 references indexed in Scilit:
- Chemical solution deposition of ZnO nanostructure films: Morphology and substrate angle dependencyCeramics International, 2012
- Nanoporous ZnO Photoelectrode for Dye-Sensitized Solar CellJournal of Nanomaterials, 2012
- Hierarchically assembled porous ZnO microstructures and applications in a gas sensorSuperlattices and Microstructures, 2011
- Synthesis, effect of capping agents, structural, optical and photoluminescence properties of ZnO nanoparticlesJournal of Luminescence, 2009
- Green, yellow, and orange defect emission from ZnO nanostructures: Influence of excitation wavelengthApplied Physics Letters, 2006
- Growth mechanism of tubular ZnO formed in aqueous solutionNanotechnology, 2006
- Preparation of ZnO Nanorods and optical characterizationsPhysica E: Low-dimensional Systems and Nanostructures, 2005
- Luminescent and structural properties of ZnO nanorods prepared under different conditionsApplied Physics Letters, 2003
- Will UV Lasers Beat the Blues?Science, 1997
- Photochemistry of semiconductor colloids. Preparation of extremely small ZnO particles, fluorescence phenomena and size quantization effectsChemical Physics Letters, 1985