Structural, morphological and photoluminescence characteristics of sol-gel derived nano phase CeO2 films deposited using citric acid
Source abstract
Abstract
Homogenous nano structured CeO2 films have been prepared by a sol-gel process using different mole ratios of citric acid as additive. XPS studies clearly illustrate an increase in Ce3+ proportion upon the use of higher citric acid content for the deposition of films. The crystallite sizes in the films lie in the nanorange. Photoluminescence emission in the films is attributed to various defects resulting from crystallization. Lowest transparency, high Ce3+ content and optimum sized crystallites in CeO2 (1:1.5) films have led to its highest PL characteristics. Ce3+ chemical state is the major contributor to the PL activity of these films. The SEM micrographs show a reduced level of CeO2 agglomeration in the films deposited using higher citric acid contents. A comparison of different properties of CeO2 films deposited using citric acid and CeO2–TiO2 films has also been made.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Catalytic Processes in Materials Science · Advanced Nanomaterials in Catalysis · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (10)
Show source-provided references
1. Krasovec U.O., Orel B., Surca A., Bukovec N., Reisfeld R. (1999). Structural and spectroelectrochemical investigations of tetragonal CeVO4 and Ce/V-oxide sol-gel derived ion-storage films. Solid State Ionics 118:19510.1016/S0167-2738(98)00456-1 ↗
2. Orel Z.C. (1999). Spectroscopic characterization of sol-gel dip-coating CeO2 and CeO2/SnO2 films. Appl. Spectroscopy 53:24110.1366/0003702991946389 ↗
3. Ozer N. (2001). Optical properties and electrochromic characterization of sol-gel deposited ceria films. Sol. Energy Mater. Sol. Cells 68:39110.1016/S0927-0248(00)00371-8 ↗
4. Stefanov P., Tanasova G., Stoychev D., Marinova Ts. (2004). Electrochemical deposition of CeO2 on ZrO2 and Al2O3 thin films formed on stainless steel. Surf. Coatings Tech. 180:44610.1016/j.surfcoat.2003.10.083 ↗
5. Toyoda T., Hayakawa T., Abe K., Shigeari T., Shen Q. (2000). Photoacoustic and photoluminescence characterization of highly porous, polycrystalline TiO2 electrodes made by chemical synthesis. J. Lumin. 87–89:123710.1016/S0022-2313(99)00526-8 ↗
6. Verma A., A.K. Bakhshi & S.A. Agnihotry, 2006a. Effect of citric acid on properties of CeO2films for electrochromic windows. Sol. Ener. Mater. Sol. Cells 90, 1640–165510.1016/j.solmat.2005.09.001 ↗
7. Verma A., A.G. Joshi, A.K. Bakhshi, S.M. Shivaprasad & S.A. Agnihotry, 2006b. Variations in the structural, optical and electrochemical properties of CeO2–TiO2 films as a function of TiO2 content. Appl. Surf. Sci. 252, 5131–514210.1016/j.apsusc.2005.07.035 ↗
8. Verma A., Samanta S.B., Bakhshi A.K., Agnihotry S.A. (2005). Sol-gel processed cerium oxide and mixed cerium–titanium oxide films as passive counter electrodes for transmissive electrochromic devices. Ind. J. Chem. 44A:1756
9. Verma A., Samanta S. B., Bakhshi A.K., Agnihotry S.A. (2004). Optimization of CeO2- TiO2 composition for fast switching kinetics and improved Li ion storage capacity. Solid State Ionics 171:8110.1016/j.ssi.2004.04.015 ↗
10. Weng W., Han G., Du P., Shen G. (2002). The effect of citric acid addition on the formation of sol–gel derived hydroxyapatite. Mater. Chem. Phys 74:9210.1016/S0254-0584(01)00399-6 ↗