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Book
Towards Green, Enhanced Photocatalysts for Hydrogen Evolution
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This book gathers selected research on the preparation, characterization and application of new organic/inorganic composites endowed with photo(electro)catalytic properties for the photocatalytic production of H2. In these pilot studies, the photoactive materials were tested under either UV-visible or, even more conveniently, under visible light for H2 evolution in “sacrificial water splitting” or “photoreforming” systems. In addition, a review article on the use of 2D materials and composites as potential photocatalysts for water splitting is included.


Book
Photocatalytic Processes for Environmental Applications
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Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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This Special Issue on “Photocatalytic Processes for Environmental Applications” offers an overview of the different photochemical processes (photocatalysis, photo-Fenton, and photolysis) triggered by different inorganic compounds that can be used for environmental applications, including water treatments. Photocatalytic mechanisms are based on the generation of electron/hole (e−/h+) pairs under suitable irradiation (hν > Eg). For water treatment, these charge carriers can form reactive oxygen species (ROS), such as hydroxyl and superoxide anion radicals, that degrade aqueous organic pollutants efficiently. In this Special Issue, different heterogeneous photocatalysts, including TiO2, CdS, CoFe2O4 and vanadium-based oxides, are discussed regarding their efficiency in the degradation of organic pollutants in water. In addition, some of these photocatalysts are composed of chemical elements that are active in Fenton-based processes, thus exhibiting enhanced degradation extents. In addition to the use of materials in water treatments, homogeneous systems, including Fe(III)-EDDS photo-Fenton and H2O2 photolysis, are also discussed to provide further possibilities for photochemically-assisted water treatments. Another interesting method related to the efficient treatment of water is the use of photoelectrochemical (PEC) systems, where the WO3 photoanode can produce H2O2, which can be subsequently used as a reactant in photocatalysis, photo-Fenton and photolysis systems.


Book
Catalysts Deactivation, Poisoning and Regeneration
Authors: ---
ISBN: 3039215477 3039215469 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Catalyst lifetime represents one of the most crucial economic aspects in industrial catalytic processes, due to costly shutdowns, catalyst replacements, and proper disposal of spent materials. Not surprisingly, there is considerable motivation to understand and treat catalyst deactivation, poisoning, and regeneration, which causes this research topic to continue to grow. The complexity of catalyst poisoning obviously increases along with the increasing use of biomass/waste-derived/residual feedstocks and with requirements for cleaner and novel sustainable processes. This book collects 15 research papers providing insights into several scientific and technical aspects of catalyst poisoning and deactivation, proposing more tolerant catalyst formulations, and exploring possible regeneration strategies.


Book
Trends in Catalytic Wet Peroxide Oxidation Processes
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ISBN: 3039219251 3039219243 Year: 2020 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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This book gives an overview of the state of the art in Catalytic Wet Peroxide Oxidation research for the treatment of industrial and urban wastewaters and provides novel solutions to overcome the current challenges of this technology. These solutions include tailoring of the catalysts to exploit the use of additional energy sources and oxidants. The collected papers illustrate the high versatility of this low-cost technology, easily adaptable to any kind of wastewater, either polluted by high-loaded recalcitrant organics in industrial wastewaters or by emerging pollutants at microconcentration levels in urban waters.


Book
Photoactive Nanomaterials
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

The energy transition is one of the key approaches in the effort to halt climate changes, and it has become even more essential in the light of the recent COVID-19 pandemic. Fostering the energy efficiency and the energy independence of the building sector is a focal aim to move towards a decarbonized society. In this context, building physics and building energy systems are fundamental disciplines based on applied physics applications in civil, architectural, and environmental engineering, including technical themes related to the planning of energy and the environment, diagnostic methods, and mitigating techniques. This Special Issue contains information on experimental studies in the following research topics: renewable energy sources, building energy analysis, rational use of energy, heat transmission, heating and cooling systems, thermofluid dynamics, smart energy systems, and energy service management in buildings.


Book
Metal Oxides
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Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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The Special Issue contains ten research papers, three of which review papers. It is a miscellaneous composition encompassing several applications where metal oxides play a key role. Some papers also give insights into novel synthesis methods and processes aiming to reduce negative environmental impacts and increase materials and process efficiency, thus also covering a broader concern of sustainability issues. The topics covered in this issues are: transparent conductive oxides, ceramic composites for tool applications, oxides nanoparticles for A-TIG welding, critical raw materials saving, metallurgical waste treatment, oxides for high temperature applications, nanostructured oxides and composites for gas sensing and desulfuration, and metal oxides sorbents for CO2 capture.


Book
From Quantum Paraelectric/Ferroelectric Perovskite Oxides to High Temperature Superconducting Copper Oxides -- In Honor of Professor K.A. Müller for His Lifework
Authors: --- ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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With this book, we wish to honor the lifework of K. Alex Müller and present him with this book on the occasion of his 94th birthday. We are convinced that he will very much enjoy reading it. We would like to thank all contributors to this book, who addressed topics complementary and related to his work. The articles of the book represent the efforts in solid state physics – spanning more than 60 years – which have been groundbreaking in scientific and applied sciences. Many of the current hot topics are derived from this earlier work which has pioneered the way toward new experimental tools and/or refined techniques. From this point of view, the book presents, on one hand, a historical review and, on the other hand, a directory of possible future research.

Keywords

ferroelastic --- WO3 --- polarons --- polaronic superconductivity --- transition metal dichalcogenides --- magnetic semiconductor spintronics --- n/a --- transition metal oxides --- lattice–spin–charge landscapes --- elasticity --- superconductivity --- cuprates --- magnetic penetration depth --- order parameter --- superconducting gap structure --- Kondo effect --- spin relaxation rate --- magnetic resonance --- strontium titanate --- quantum paraelectricity --- quantum fluctuations --- ferroelectricity --- isotope exchange --- external stress --- polar metal --- phase coexistence --- magnetoelectric multiglass --- Electron Paramagnetic Resonance (EPR) --- ENDOR --- Jahn-Teller --- color centers --- 3d impurities --- perovskite --- SrTiO3 --- 18O --- isotope substitution --- SrTiO3/LaAlO3 --- interface --- heterostructure --- tungsten oxide --- phase separation --- cuprate superconductors --- electronic correlations --- NMR --- pseudogap --- perovskite crystals --- Pseudo-Jahn-Teller effect --- multiferroicity --- permittivity --- flexoelectricity --- polar nanoregions --- orientational polarization --- LSCO --- anti-Jahn-Teller effect --- first-principles calculation --- Kamimura-Suwa model --- spin-polarized band --- Hund’s coupling spin-triplet and spin-singlet multiplets --- high-temperature superconductivity --- correlated Femi liquid --- charge density wave --- fluctuation --- strange metal --- coherence length --- granular superconductivity --- Mott transition --- BCS–BEC cross-over --- electron-phonon interaction --- topological insulator --- topological materials --- transition metal dichalcogenide --- helium atom scattering --- perovskite oxides --- phase transitions --- high-temperature cuprate superconductors --- lattice-spin-charge landscapes --- Hund's coupling spin-triplet and spin-singlet multiplets --- BCS-BEC cross-over

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