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Book
Titanium Dioxide Photocatalysis
Authors: ---
ISBN: 3038976954 3038976946 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Although the seminal work of Fujishima et al. dates back to 1971, TiO2 still remains the most diffused and studied semiconductor, employed in photo-oxidation processes for cleantech (i.e., polluted water and air treatment), in solar fuel production (mainly hydrogen production by water photo splitting), and in Carbon Capture and Utilization (CCU) processes by CO2 photoreduction. The eleven articles, among them three reviews, in this book cover recent results and research trends of various aspects of titanium dioxide photocatalysis, with the chief aim of improving the final efficiency of TiO2-based materials. Strategies include doping, metal co-catalyst deposition, and the realization of composites with plasmonic materials, other semiconductors, and graphene. Photocatalysts with high efficiency and selectivity can be also obtained by controlling the precise crystal shape (and homogeneous size) and the organization in superstructures from ultrathin films to hierarchical nanostructures. Finally, the theoretical modeling of TiO2 nanoparticles is discussed and highlighted. The range of topics addressed in this book will stimulate the reader’s interest as well as provide a valuable source of information for researchers in academia and industry.


Book
Graphene and Other 2D Layered Nanomaterial-Based Films: Synthesis, Properties and Applications
Authors: ---
ISBN: 3039219030 3039219022 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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This book is dedicated to highlighting some relevant advances in the field of thin films and coatings based on two-dimensional crystals and layered nanomaterials. Due to their layered structure, graphene and a variety of new 2D inorganic nanosystems, called “graphene analogues”, have all attracted tremendous interest due to their unprecedented properties/superior performance, and may find applications in many fields from electronics to biotechnology. These two-dimensional systems are ultrathin and, hence, tend to be flexible, also presenting distinctive and nearly intrinsic characteristics, including electronic, magnetic, optical, thermal conductivity, and superconducting properties. Furthermore, the combination of different structures and synergetic effects may open new and unprecedented perspectives, making these ideal advanced materials for multifunctional assembled systems. As far as the field of coatings is concerned, new layered nanostructures may offer unique and multifunctional properties, including gas barrier, lubricant, conductive, magnetic, photoactive, self-cleaning, and/or antimicrobial surfaces. This book contains new findings on the synthesis and perspectives of multifunctional films that are at the forefront of the science and coating technologies.


Book
Advances in Synthesis of Metallic, Oxidic and Composite Powders
Authors: ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Advances in synthesis of metallic, oxidic and composite powders were presented via the following methods: ultrasound-assisted leaching¸ ultrasonic spray pyrolysis, hydrogenation, dehydrogenation, ball milling, molten salt electrolysis, galvanostatic electrolysis, hydrogen reduction, thermochemical decomposition, inductively coupled thermal plasma, precipitation and high pressure carbonation in an autoclave. This Special Issue contains 17 papers from Europe, Asia, Australia, South Africa and the Balkans. The synthesis was focused on metals: Co, Cu; Re; oxides: ZnO, MgO, SiO2; V2O5; sulfides: MoS2, core shell material: Cu-Al2O3, Pt/TiO2; compounds: Ca0.75Ce0.25ZrTi2O7, Mo5Si3, Ti6Al4V. The environmentally friendly strategies were presented at the carbonation of olivine, treatment of acid mine drainage water and production of vanadium oxide.


Book
Nanostructured Light-Emitters
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Significant progress has been made in nanophotonics and the use of nanostructured materials for optoelectronic devices, including light-emitting diodes (LEDs) and laser diodes, which have recently attracted considerable attention due to their unique geometry. Nanostructures in small dimensions, comprising nanowires, nanotubes, and nanoparticles, etc,. can be perfectly integrated into a variety of technological platforms, offering novel physical and chemical properties for high-performance, light-emitting devices. This Special Issue aims to present the most recent advances in the field of nanophotonics, which focuses on LEDs and laser diodes. We invite contributions of original research articles, as well as review articles that are aligned to the following topics that include, but are not limited to, thetheoretical calculation, synthesis, characterization, and application of such novel nanostructures for light-emitting devices. The application of nanostructured light-emitters in general lighting, imaging, and displays is also highly encouraged.

Keywords

Liquid phase deposition method --- InGaN/GaN light-emitting diode --- silver nanoparticle --- zinc oxide --- localized surface plasmon --- β-Ga2O3 --- III-Nitrides --- monoclinic --- hexagonal arrangement --- high-power --- current distribution --- vertical structure LED --- blue organic light emitting diodes --- transport materials --- host-dopant --- nanoparticles --- luminescence --- non-stoichiometric ZnxAgyInS1.5+x+0.5y nanocrystals --- photoluminescence properties --- tunable fluorescence emission --- one-pot approach --- perovskite light-emitting diodes --- three-step spin coating --- hole transport layer --- PEDOT:PSS/MoO3-ammonia composite --- μLED displays --- μLEDs --- GaN nanowires --- core-shell structure --- ultraviolet (UV) emitter --- surface plasmon --- Pt nanoparticles --- hole-pattern --- photon emission efficiency --- distributed Bragg reflectors --- gratings --- GaN-based lasers --- linewidth --- epsilon-near-zero --- wideband absorber --- plasmon mode --- Brewster mode --- visible light communication --- photonic crystals --- flip-chip LED --- Purcell effect --- light extraction efficiency --- nanostructured materials --- surface/interface properties --- nanostructured light-emitting devices --- physical mechanism --- surface/interface modification --- surface/interface control --- micro-scale light emitting diode --- sapphire substrate --- encapsulation --- compound semiconductor --- nanostructure --- ultraviolet --- light-emitting diode (LED) --- molecular beam epitaxy --- GaN --- AlN --- photonic nanojet --- photonic nanojet array --- self-assembly --- template-assisted self-assembly --- patterning efficiency --- III-nitride thin film --- nanostructures --- ultraviolet emitters --- surface passivation --- luminescence intensity --- n/a

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