Morphological Characterization of Shape-Controlled TiO2 Anatase through XRPD Analysis
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Mauro Coduri
,
Michela Maisano
Abstract
Preferential growth of anatase crystallites along different directions is known to deeply affect their photocatalytic properties, especially with respect to the exposure of the reactive {001} facets. Its extent can be easily quantified through simple geometric calculations, on the basis of crystal sizes extracted for specific directions by means of X-Ray Diffraction data analysis. Nevertheless, the actual results depend on the method employed for such a quantification. Here we report on a comparative morphological investigation, performed by employing the Scherrer equation and the line profile from Rietveld refinements, on shape-controlled anatase photocatalysts produced by employing HF as capping agent. Compared to the Rietveld-based method, the use of the Scherrer equation produces a systematic underestimation of crystallite dimensions, especially concerning the [100] direction, which in turn causes the percentage of exposed {001} crystal facets to be underestimated. Neglecting instrumental-related effects may further reduce the estimate.
Acknowledgement
Financial support from the Cariplo Foundation through the 2013-0615 grant to the project “Novel Photocatalytic Materials Based on Heterojunctions for Solar Energy Conversion” is gratefully acknowledged.
©2016 Walter de Gruyter Berlin/Boston
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Artikel in diesem Heft
- Frontmatter
- Editorial
- The First European Conference on Physical and Theoretical Chemistry
- Inverse Calibration Free fs-LIBS of Copper-Based Alloys
- Influence of the Ce:YAG Amount on Structure and Optical Properties of Ce:YAG-PMMA Composites for White LED
- Morphological Characterization of Shape-Controlled TiO2 Anatase through XRPD Analysis
- Optical and Geometric Properties of Free Silica Nanoparticles Studied by Small-Angle X-Ray Scattering
- Olive Mill Wastewater (OMW) Phenol Compounds Degradation by Means of a Visible Light Activated Titanium Dioxide-Based Photocatalyst
- The Electrochemical Degradation of Poly(3,4-ethylenedioxythiophene) Films Electrodeposited from Aqueous Solutions
- Repassivation Investigations on Aluminium: Physical Chemistry of the Passive State
- Excitation-Energy Transfer Paths from Tryptophans to Coordinated Copper Ions in Engineered Azurins: a Source of Observables for Monitoring Protein Structural Changes
- Are Two Better Than One? A New Approach for Multidentate Grafting of Peptides to a Gold Substrate
- Peptide Hydration Phenomena through a Combined Quantum Chemical and Bottom-Up Approach
- Relative Stability of the Scleroglucan Triple-Helix and Single Strand: an Insight from Computational and Experimental Techniques
- Revised Atomistic Models of the Crystal Structure of C–S–H with high C/S Ratio
- Assessing Accuracy of Exchange-Correlation Functionals for the Description of Atomic Excited States
- Photodegradation of Organic Pollutants on TiO2 P25 Surfaces Investigated by Transmission FTIR Spectroscopy Under In Situ UV-Vis Irradiation
