Advances in nanostructures fabricatedviaspray pyrolysis and their applications in energy storage and conversion

Chemical Society Reviews, Год журнала: 2019, Номер 48(11), С. 3015 - 3072

Опубликована: Янв. 1, 2019

Functional nanostructured materials have attracted great attention over the past several decades owing to their unique physical and chemical properties, while applications been proven be advantageous not only in fundamental scientific areas, but also many technological fields. Spray pyrolysis (SP), which is particularly facile, effective, highly scalable suitable for on-line continuous production, offers significant potential rational design synthesis of various functional with tailorable composition morphology. In this review, we summarize recent progress synthesized by SP energy storage conversion. After a brief introduction equipment, components, working principles technique, thoroughly describe guidelines strategies designing particles controlled morphology, composition, interior architecture, including hollow structures, dense spheres, yolk-shell core-shell nanoplates, nanorods, nanowires, thin films, nanocomposites. Thereafter, demonstrate suitability wide range conversion applications, electrode rechargeable batteries, supercapacitors, active catalysts hydrogen carbon dioxide reduction fuel cells, photoelectric solar cells. Finally, advantages challenges preparation are emphasized discussed, perspectives on future research development directions highlighted. We expect that continuous, one-pot, controllable synthetic technology can serve as reference preparing advanced broader applications.

Язык: Английский

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Interfacial Assembly and Applications of Functional Mesoporous Materials

Chemical Reviews, Год журнала: 2021, Номер 121(23), С. 14349 - 14429

Опубликована: Окт. 5, 2021

Functional mesoporous materials have gained tremendous attention due to their distinctive properties and potential applications. In recent decades, the self-assembly of micelles framework precursors into mesostructures on liquid-solid, liquid-liquid, gas-liquid interface has been explored in construction functional with diverse compositions, morphologies, mesostructures, pore sizes. Compared one-phase solution synthetic approach, introduction a two-phase system changes behaviors between species, leading possibility for on-demand fabrication unique architectures. addition, controlling interfacial tension is critical manipulate process precise synthesis. particular, breakthroughs based concept "monomicelles" assembly mechanism are very promising interesting synthesis control. this review, we highlight strategies, principles, engineering at macroscale, microscale, nanoscale oriented over past 10 years. The applications various fields, including adsorption, separation, sensors, catalysis, energy storage, solar cells, biomedicine, discussed. Finally, also propose remaining challenges, possible directions, opportunities field future outlook.

Язык: Английский

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Synthesis of Metal Oxide Nanoparticles in Flame Sprays: Review on Process Technology, Modeling, and Diagnostics

Energy & Fuels, Год журнала: 2021, Номер 35(7), С. 5495 - 5537

Опубликована: Март 9, 2021

The gas synthesis of nanoparticles has gained major interest by different industries and research groups for the development new materials their subsequent implementation in numerous devices applications. Actually, there are application activities flame-based nanoparticle production, mainly focusing on process its development, situ ex analyses experiments simulations material combination developments. This review provides an overview flame metal oxide focuses particular design spray pyrolysis (FSP). first part this describes historical background particle production further summarizes emerging developments, achievements, trends during past 2 decades. second covers a general aerosol-based manufacturing explaining key aspects (chemical raw materials, precursors, solvents, reactor configurations), conditioning approaches, powder byproduct collection, along with additional post-processing steps (storage, handling, modification). Applications flame-made involve catalysts, sensors, energy storage nanotoxicity studies, among others, which will not be discussed detail but overviewed listing latest reviews respective field. third growth mechanisms solid products liquid droplet/spray (liquid-to-particle gas-to-particle conversion). concept characteristic times is then exemplified lab-scaled FSP reactor, while afterward, dynamics continuum models simulation reviewed. fourth survey more than 20 diagnostic techniques that commonly employed characterization reactive sprays powders. We briefly explain metrology basics each method, indicate advantages limitations, present exemplary measurement results have been acquired facilities synthesis. Finally, we summarize address some current challenges might potentially shape near future sprays.

Язык: Английский

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Multifunctional, Hybrid Materials Design via Spray‐Drying: Much more than Just Drying

Advanced Materials, Год журнала: 2023, Номер 35(47)

Опубликована: Окт. 15, 2023

Spray-drying is a popular and well-known "drying tool" for engineers. This perspective highlights that, beyond this application, spray-drying very interesting powerful tool materials chemists to enable the design of multifunctional hybrid materials. Upon spray-drying, confined space liquid droplet narrowed down, its ingredients are forced together upon "falling dry." As detailed in article, enables following material formation strategies either individually or even combination: nanoparticles and/or molecules can be assembled; precipitation reactions as well chemical syntheses performed; templated designed. Beyond this, fragile moieties processed, "precursor materials" prepared. Post-treatment spray-dried objects eventually next level complex Using (particulate) comes with many advantages-but also challenges-all which outlined here. It believed that multifunctional, materials, made via unique property combinations particularly highly promising myriad applications-of catalysis, diagnostics, purification, storage, information highlighted.

Язык: Английский

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Spray-Drying Synthesis of MOFs, COFs, and Related Composites

Accounts of Chemical Research, Год журнала: 2020, Номер 53(6), С. 1206 - 1217

Опубликована: Июнь 4, 2020

ConspectusMetal-organic frameworks (MOFs) and covalent organic (COFs) are among the most attractive porous materials today. They exhibit outstanding porosity for countless applications such as gas storage, CO2 capture, separation, sensing, drug delivery, catalysis. Moreover, researchers have recently begun to combine MOFs or COFs with other functional obtain composites that boast respective strengths, mitigate weaknesses, of each component, enabling enhanced performance in many aforementioned applications. Accordingly, development methods fabrication MOFs, COFs, related is important facilitating adoption these industry. One promising synthetic technique spray-drying, which already well-integrated manufacturing processes diverse sectors. It enables rapid, continuous scalable production dry microspherical powders a single step, leading lower costs shorter times compared traditional methods.In this Account, we outline our ongoing work on spray-drying synthesis crystalline composites. Versatile tunable, can be adapted perform reactions involving coordination chemistry micrometer spherical beads/superstructures COFs. Likewise, MOF- COF-based synthesized using similar conditions those pure through simple introduction additional into feed precursor solution colloid. Interestingly, also done water, thus providing basis its use green method industrial materials. To date, has been scaled up pilot (kilogram scale) MOFs.

Язык: Английский

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Hierarchically Structured Ultraporous Iridium‐Based Materials: A Novel Catalyst Architecture for Proton Exchange Membrane Water Electrolyzers

Advanced Energy Materials, Год журнала: 2018, Номер 9(4)

Опубликована: Дек. 3, 2018

Abstract Iridium oxide is the gold‐standard catalyst for oxygen evolution reaction (OER) in acidic media due to its unmatched activity and stability. Here, a new architecture comprising nanoneedle network of iridium‐containing oxides assembled into macroporous micrometric particles with ≈75% porosity reported. The rationally designed porous hierarchical structure optimizes accessibility reactants products surface nanoparticles maximizes activity. materials are easily prepared from aqueous solutions by an industrially viable spray‐drying route through evaporation self‐assembly mechanism. versatility process enables preparation mixed low iridium content, tunable crystallinity, various species high electrochemical Highly Ir 0.7 Ru 0.3 O 2 outperforms commercial oxide. These also represent ideal platform assess reactivity involved reaction. Furthermore, it demonstrated that these highly optimal building blocks be integrated layers, without drawbacks associated use discrete nanoparticles. Fresh‐ end‐of‐test membrane–electrode assemblies' characterization shows their particular preserved upon layer after operation proton‐exchange membrane electrolysis cell.

Язык: Английский

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Photodriven Disproportionation of Nitrogen and Its Change to Reductive Nitrogen Photofixation

Angewandte Chemie International Edition, Год журнала: 2020, Номер 60(2), С. 927 - 936

Опубликована: Сен. 26, 2020

Abstract Nitrogen fixation is an essential process for sustaining life. Tremendous efforts have been made on the photodriven of nitrogen into ammonia. However, disproportionation dinitrogen to ammonia and nitrate under ambient conditions has remained a grand challenge. In this work, realized in water visible light using Fe‐doped TiO 2 microspheres. The oxygen vacancies associated with Fe dopants activate chemisorbed N molecules, which can then be fixed NH 3 H O as oxidation product. generated thereafter oxidizes nitrate. This reaction turned reductive one by loading plasmonic Au nanoparticles doped effectively decomposed nanoparticles, resulting transformation completely photofixation.

Язык: Английский

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Comprehensive understanding of the synthesis and formation mechanism of dendritic mesoporous silica nanospheres

Nanoscale Advances, Год журнала: 2020, Номер 2(5), С. 1792 - 1810

Опубликована: Янв. 1, 2020

The elucidation of structure and formation mechanism dendritic mesoporous silica nanospheres is in extensive debates. This review summarizes the recent advance on their synthesis application, more concerned kinetic mechanics.

Язык: Английский

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Titanosilicate Epoxidation Catalysts: A Review of Challenges and Opportunities

ChemCatChem, Год журнала: 2021, Номер 14(1)

Опубликована: Сен. 22, 2021

Abstract Epoxidation reactions are tremendously important for modern chemistry, as they lead to series of highly useful bulk and fine chemicals, monomers, intermediates organic synthesis. Progress in epoxidation processes goes hand with the advancement made catalysis science. In this context, heterogeneous catalysts, particularly Ti‐based formulations, playing a central role have seen tremendous developments over past two decades, leveraging on advanced materials The aim review is illustrate various strategies titanosilicate catalysts preparation that can more versatile, performant, greener processes. We successively cover (i) supported obtained by grafting Ti species onto preformed silica supports, (ii) microporous crystalline titanosilicates (zeolites), (iii) amorphous sol‐gel chemistry. For each category, an emphasis catalyst preparation, challenges be tackled boost performance highlighted. From point, we present critical different approaches been proposed primary literature tailor properties govern (activity, selectivity, stability, ease handling). This done better controlling nature active surface species, adapting particles size shape, optimizing texture, modifying etc. These lines attack encompass molecular well‐defined top‐down bottom‐up synthesis hierarchically porous zeolites, routes potentially performed non‐conventional media or coupled original processing, self‐standing monoliths, Future research directions discussed application scope new catalytic possible increase performance.

Язык: Английский

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Evolution of photocatalytic activity of CeO2–Bi2O3 composite material for wastewater degradation under visible-light irradiation

Optical Materials, Год журнала: 2022, Номер 126, С. 112201 - 112201

Опубликована: Март 10, 2022

Язык: Английский

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