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Nanoparticles for Catalysis

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ISBN: 9783038425366 9783038425373 Year: Pages: X, 154 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General)
Added to DOAB on : 2017-10-25 13:21:26
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The present book is aimed at illustrating the width of applications of metal nanoparticles in catalysis. It covers aspects such as metal nanoparticles preparation using natural biomolecules to the catalytic, photocatalytic and electrocatalytic activity of supported metal nanoparticles. In catalysis, metal nanoparticles exhibit general activity in oxidation and reduction reactions and the book contains examples of both types of processes in which the nanoparticles are on carbon supports or embedded inside the voids of microporous crystalline metal organic frameworks. Metal nanoparticles are also widely used in photocatalysis to enhance light absorption through plasmon band and the efficiency of the photochemical process. Besides classical applications, the use of metal nanoparticles is expanding rapidly in the field of renewable energies, going from catalysts for solid fuels electrodes to novel Li-O2 batteries.

Application and Behavior of Nanomaterials in Water Treatment

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ISBN: 9783039211715 / 9783039211722 Year: Pages: 174 DOI: 10.3390/books978-3-03921-172-2 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-12-09 11:49:15
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The book compiles scientific articles describing advances in nanomaterial synthesis and their application in water remediation. The publications treat diverse problems such as dye degradation, heavy metal ion, as well as radioactive element capture and sequestration. There are 10 original research articles and one review article. The latter proposes graphene/CNT and Prussian blue nanocomposites for radioactive 137-cesium extraction from aqueous media. All reports thoroughly characterize the nanomaterials post-synthesis and describe their catalytic, photocatalytic, or ion exchange activities in contaminated water. The dyes studied in the collection are azo dyes, i.e. methylene blue and orange, rhodamine B, phenolic dyes viz. bromophenol blue, and other dyes with sulfonyl groups. Extraction of radioactive elements, including cationic 137Cs+ and anionic 125I?, is also investigated. The omnipresence of ZnO nanoparticles in everyday products and their effects in wastewater are also evaluated. Layered double hydroxide are capable of capturing Ag ions, which then has a catalytic effect on dye degradation. The nanomaterials considered are varied, viz., graphene, CNT, Prussian blue, nanoporous carbon, layered double hydroxides, magnetite, ferrites, organic powders, polymer membranes, bacteria, and inorganic nanomaterials such as MnO and Ag. The book targets an interdisciplinary readership.

Titanium Dioxide Photocatalysis

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ISBN: 9783038976943 / 9783038976950 Year: Pages: 208 DOI: 10.3390/books978-3-03897-695-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General)
Added to DOAB on : 2019-06-26 08:44:06
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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.

Bioactive and Therapeutic Dental Materials

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ISBN: 9783039214198 / 9783039214204 Year: Pages: 216 DOI: 10.3390/books978-3-03921-420-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General)
Added to DOAB on : 2019-12-09 11:49:15
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This book focus principally on ions-releasing and other smart dental materials for application in preventive and restorative dentistry, as well as in endodontics in the form of adhesives, resin-based composites, pastes, varnishes, liners and dental cements. Special attention has been given to bioactive materials developed to induce cells differentiation/stimulation, hard tissue formation and exert antimicrobial actions. New innovations are necessary to continue to help reinforcing existing technologies and to introduce new paradigms for treating dental disease and restoring teeth seriously compromised by caries lesions via biomimetic and more biological operative approaches. Dental bioactive materials is arguably the latest research area in dentistry and thus the amount of new research is overwhelming. However, in this day and age of evidence based practice it important for this new information to be distilled into a practical and understandable format.

Keywords

orthodontic resin --- photocatalyst TiO2 --- antibacterial --- cariogenic --- early colonizer --- hydrophilic properties --- irradiation --- calcium silicate cements --- pulpal response --- mineralization --- calcific barrier --- inflammation --- odontoblastic layer --- resin cements --- shrinkage stress --- water sorption --- hydroscopic expansion --- photoelastic investigation --- antibacterial --- calcium --- doxycycline --- nanoparticles --- zinc --- dental composites --- antibacterial properties --- silver --- mechanical properties --- degree of conversion --- sorption --- solubility --- color stability --- mechanical properties --- nanotubes --- resin composite --- Streptococcus mutans --- triclosan --- bleaching products --- diffusion --- cytotoxicity --- dental pulp --- stem cells --- nanoporous silica --- glass-ionomer cement --- calcium --- preclinical biosafety --- bone substitute --- mesenchymal stem cells --- ?-tricalcium phosphate --- tissue engineering --- dental sealant --- resin sealant --- calcium phosphate nanoparticles --- long-term ion release --- remineralization --- ion recharge --- dentin --- desmineralization --- microtensile bond strength --- adhesion --- bioactive --- cycling mechanical stress --- dentine --- longevity --- resin-modified glass ionomer cements --- polyacrylic acid treatment --- bone regeneration --- ?-tricalcium phosphate --- calcium sulfate --- bone substitutes --- animal study --- n/a --- adhesion --- cycling mechanical stress --- dentine --- longevity --- glass-ionomer cements --- universal adhesives

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