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2024 | Book

Pyrochlore Oxides

Structure, Properties, and Potential in Photocatalytic Applications

Editors: Diana G. Fukina, Artem S. Belousov, Evgeny V. Suleimanov

Publisher: Springer Nature Switzerland

Book Series : Green Chemistry and Sustainable Technology


About this book

This book presents an in-depth exploration of complex metal oxides, focusing on their applications in photocatalysis and biomedical materials. It highlights the practical importance of complex metal oxides, which have gained significant attention in recent years due to their diverse range of properties. The book specifically delves into the most representative series of compounds based on stable structural types of minerals, such as perovskite, fluorite, pyrochlore, corundum, and rutile. It also emphasizes the scientific interest in the pyrochlore mineral structure, which has been shown to exhibit photocatalytic activity.

Recent studies have revealed that some compounds with the pyrochlore structure can act as promising candidates for photocatalysis. Additionally, the book highlights the use of photocatalysis in producing biomedical materials based on natural polymers. These materials possess a unique combination of components assembled in a specific structure, which makes them highly attractive for regenerative medicine associated with cell/tissue regeneration stimulation. Overall, this book offers a comprehensive analysis of the potential of complex metal oxides, particularly those with the pyrochlore structure, and is particularly useful for those researchers working in the fields of green chemistry and biomedical materials science.

Table of Contents

Chapter 1. Structural Type of α-Pyrochlore Oxides
The structure of the ideal α-pyrochlore with stoichiometry A2M2X6X′ (A—large low-charge cation of alkali, alkaline earth, or rare earth elements), M—a small high-charge cation capable of octahedral coordination (p- or d-elements), X—ions O2– and OH, F, or molecules H2O, X′—ions weakly bound to M) has a cubic symmetry with the space group \(Fd\overline{3}m\) (Z = 8). This Chapter is devoted to consideration of the structural features and properties of α-pyrochlore oxides.
D. G. Fukina, E. V. Suleimanov
Chapter 2. Structural Type of β-Pyrochlore Oxides AM2O6
D. G. Fukina, E. V. Suleimanov
Chapter 3. Theoretical Foundations of Photocatalysis
The technological progress of the twentieth-twenty-first centuries has caused serious problems: the depletion of traditional non-renewable sources (oil, gas, coal) as well as environmental problems, primarily related to the greenhouse effect. The study of the photocatalysis and the development of new effective photocatalytic systems can lead to solving problems associated with the need to replace non-renewable raw materials and energy sources with renewable ones, as well as significantly advance in reducing the concentration of carbon dioxide in the atmosphere by capturing and further transforming it into value-added products. This Chapter covers general aspects of photocatalytic reactions as well as the photocatalytic materials with the main focus on pyrochlore oxides and methods for improving their activity.
A. S. Belousov
Chapter 4. Application of Compounds with Pyrochlore Structure in Photocatalysis
Currently, the activity of various photocatalytic systems in the degradation processes is studied using a large number of diverse organic substances as model pollutants (synthetic dyes, antibiotics, alcohols, aldehydes, aromatic compounds, etc.). Chapter 4 is devoted to the use of pyrochlore oxides in various photocatalytic reactions, namely degradation of organic pollutants, water splitting and CO2 reduction. Much attention is also paid to the reactions mechanism.
A. S. Belousov, D. G. Fukina
Chapter 5. Synthesis of Composites Based on Natural and Synthetic Polymers as Precursors for Medical Materials in the Presence of β-Pyrochlore Oxides
The need to develop bioartificial organs for replacement or restoration of damaged and deformed organs is due to a number of reasons. First, it should be noted that for the restoration of affected organs, donor tissues are most often used, which are increasingly lacking to meet growing needs.
L. L. Semenycheva, V. O. Chasova, N. B. Valetova
Chapter 6. Antimicrobial Effect of Nano- and Sub-micron Particles of Metal Oxides with β-Pyrochlore Structure
Among biocidal preparations, substances based on metal oxides (ZnO, TiO2, CuO, etc.) are widely used. These compounds are capable of suppressing the vital activity of bacteria, fungi, algae and are used in medicine, veterinary medicine, agriculture, as well as protecting industrial materials from bio-damage and biofouling
V. F. Smirnov, O. N. Smirnova, N. A. Anikina, A. Yu. Shishkin
Chapter 7. Methods for Preparation of Pyrochlore Oxides and Their Effect on the Photocatalytic Activity
For the future commercialization of pyrochlore oxides, it is crucial to simplify their preparation method to make them cost-efficient and “green” with maintaining high photocatalytic performances. Several preparation methods for pyrochlore fabrication are considered in this chapter.
A. S. Belousov
Pyrochlore Oxides
Diana G. Fukina
Artem S. Belousov
Evgeny V. Suleimanov
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