Influence of annealing temperature on structural, optical and photocatalytic properties of TiO2-CeO2 nanopowders
Source abstract
Abstract
Abstract TiO2-CeO2 nanopowders were synthesised by a ball-milling process and then annealed at temperatures from 500° to 800 °C. X-ray diffraction and diffuse reflectance spectra were used in combination with temperature programmed desorption to determine the structural and microstructural changes of nanopowders as a the function of annealing temperature. The results of the X-ray analysis showed that the weight fraction of the cerianite phase remained unchanged with a temperature rise of 600–700 °C, indicating that the phase changes occur only within TiO2. The TiO2-CeO2 nanopowder showed enhanced optical properties with a red shift after the thermal treatment. Photocatalytic studies revealed that the sample annealed at 600 °C showed higher photocatalytic activity than samples annealed at lower or higher temperatures in the degradation of the methyl orange. The activity test of all samples is in accordance with photoluminescence measurements, proportional to the concentrations of hydroxyl radicals at the photocatalyst surfaces.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Catalytic Processes in Materials Science · TiO2 Photocatalysis and Solar Cells · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. TiO2 photocatalysis and related surface phenomena
2. Photocatalytic, photoelectrochemical, and antibacterial activity of benign by design mechanochemically synthesized metal oxide nanomaterials10.1016/j.cattod.2016.07.010 ↗
3. Photocatalytic degradation of azo pyridone dye: optimization using response surface methodology10.1080/19443994.2012.750699 ↗
4. Influence of annealing temperature and organic dyes as sensitizers on sol-gel derived TiO2 films10.1016/j.mseb.2014.04.010 ↗
5. Enhancement of photocatalytic activity of P25 TiO2 by vanadium ion implantation under visible light irradiation10.1016/j.jcis.2007.03.007 ↗
6. A review on the visible light active titanium dioxide photocatalysts for environmental applications10.1016/j.apcatb.2012.05.036 ↗
7. Structural and fractal characterization of tungstophosphoric acid modified titanium dioxide photo catalyst10.1016/j.jpcs.2016.12.002 ↗
8. Enhanced photocatalytic activity of hierarchical flower like CeO2/TiO2 heterostructures10.1016/j.matlet.2016.03.136 ↗
9. Y/Eu co-doped TiO2: synthesis and photocatalytic activities under UV-light10.1016/S1002-0721(14)60396-3 ↗
10. Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation10.1016/j.apsusc.2016.02.131 ↗
11. Thermally stable ordered mesoporous CeO2/TiO2 visible light photocatalysts10.1039/b819167k ↗
12. Solution-processed CeO2/TiO2 nanocomposite as potent visible light photocatalyst for the degradation of bromophenol dye10.1016/j.cej.2014.02.104 ↗
13. Nanostructured TiO2 - CeO2 mixed oxides by an aqueous sol - gel process: effect of Ce: Ti molar ratio on physical and sensing properties10.1016/j.snb.2010.08.029 ↗
14. Enhanced photocatalytic performances of CeO2/TiO2 nanobelt heterostructures10.1002/smll.201202346 ↗
15. Enhancement of photocatalytic properties of TiO2 nanoparticles doped with CeO2 and supported on SiO2 for phenol degradation10.1016/j.apsusc.2015.01.069 ↗
16. Synthesis of mesoporous ceria/titania thin films for self-cleaning applications10.1016/j.jcis.2013.04.032 ↗
17. Preparation and characterization of CeO2/TiO2 nanoparticles by flame spray pyrolysis10.1016/j.ceramint.2010.11.018 ↗
18. Mechanochemikal synthesis of advanced nanomaterials for catalytic applications10.1039/C4CC09876E ↗
19. Application of heterogeneous catalysts prepared by mechanochemical synthesis10.1039/c3cs60066a ↗
20. Optimization of a nanoparticle ball milling process parameters using the response surface method10.1016/j.apt.2018.05.021 ↗
21. Williamson-Hall analysis in estimation of lattice strain in nanometer-sized ZnO particles10.1186/2251-7235-6-6 ↗
22. Optical properties and electronic structure of amorphous germanium10.1002/pssb.19660150224 ↗
23. Photocatalytic activity and stability of TiO2 and WO3 thin films10.1016/j.matchar.2012.04.021 ↗
24. Degradation of the herbicide 2,4-dichlorophenoxyacetic acid over TiO2-CeO2 sol-gel photocatalysts: effect of the annealing temperature on the photoactivity10.1016/j.jphotochem.2010.11.010 ↗
25. Sol-gel synthesis of TiO2-Fe2O3 systems: effects of Fe2O3 content and their photocatalytic properties10.1016/j.jiec.2016.05.015 ↗
26. Photoactivity and phase stability of ZrO2 doped anatase-- type TiO2 directly formed as nanometer sized particles by hydrolysis under hydrothermal conditions10.1016/S0022-4596(02)00013-0 ↗
27. Photoactivity of anatase-rutile TiO2 nanocrystalline mixtures obtained by heat treatment of homogeneously precipitated anatase10.1016/j.apcatb.2004.06.019 ↗
28. Effect of annealing treatment on the microstructure and mechanical properties of ultrafine-grained aluminium10.1016/j.matdes.2013.06.075 ↗
29. Crystal structure and orthorhombic–tetragonal phase transition of nanoscale (Li0.06Na0.47K0.47)NbO310.1016/j.jeurceramsoc.2009.02.012 ↗
30. Physical properties of chalcogenide Sn–Bi–S graded thin films annealed in argon10.1007/s00339-015-9325-7 ↗
31. Methylene blue photodegradation employing hexagonal prismshaped niobium oxide as heterogeneous catalyst: effect of catalyst dosage, dye concentration, and radiation source10.1016/j.matchemphys.2018.04.063 ↗
32. Methanol oxidation as a catalytic surface probe10.1016/S0926-860X(96)00236-0 ↗
33. Environmental applications of semiconductor photocatalysis10.1021/cr00033a004 ↗
34. Effect of organic acids on the phisikochemical properties of titania and its photodegradation efficiency of methyl orange10.1016/j.jpcs.2018.05.032 ↗
35. Preparation, characterization and activity evaluation of Ag2Mo4O13 photocatalyst10.1016/j.jhazmat.2010.12.109 ↗
36. WO3/TiO2 composite coatings: structural, optical and photocatalytic properties10.1016/j.materresbull.2016.06.011 ↗