Rational Design of Efficient Semiconductor-based Photocatalysts via Microdroplets: A Review

He, Xiang; Wang, Weining

doi:10.14356/kona.2019014

Cited by 9 publications

(5 citation statements)

References 105 publications

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“…The morphologies of Cu-BDC, Cu-TMA, and Cu-(BDC) 2 (TMA) x were examined by SEM. As shown in Figure A, the pure Cu-TMA sample has a spherical shape, which can be attributed to the typical formation mechanism in the spray process, , while with an increasing amount of BDC the spherical shape of the samples became less intact (Figure B–E). The crystal structures of the samples were analyzed with XRD measurements.…”

Section: Resultsmentioning

confidence: 87%

Synthesis of Cu-Trimesic Acid/Cu-1,4-Benzenedioic Acid via Microdroplets: Role of Component Compositions

Wang

2018

Crystal Growth & Design

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Mixed-linker metal−organic frameworks (MOFs) offer great tunability in both pore structures and surface chemistry. This study reports the synthesis and characterization of model mixed-linker MOFs (i.e., Cu-TMA/Cu-BDC; BDC = 1,4-benzenedioic acid, TMA = trimesic acid) via a microdropletbased spray process, to unravel the relationship between the properties of mixed-linker MOFs and the component compositions. The as-prepared mixed-linker MOFs exhibited distinct properties in terms of morphology, crystalline phase, surface chemistry, and pore structure. In particular, two-dimensional correlation spectroscopy (2D-COS) analysis was conducted to analyze the correlational features among surface functional groups, which are unattainable from traditional infrared and Raman spectra. The results from the 2D-COS analysis also suggest that the surface chemistry of the mixed-linker MOFs is adjustable by controlling the precursor conditions. Measurements of CO 2 adsorption on the mixed-linker MOFs demonstrated the tunability of the preferential adsorption sites and adsorption kinetics. All the above-mentioned information implies that synthetic parameters can be varied to optimize the performance of the mixed-linker MOFs. The outcome of this study offers new insights into the synthetic chemistry of mixed-linker MOFs in a microdroplet-based spray process.

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Section: Resultsmentioning

confidence: 87%

Synthesis of Cu-Trimesic Acid/Cu-1,4-Benzenedioic Acid via Microdroplets: Role of Component Compositions

Wang

2018

Crystal Growth & Design

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“…In the spray pyrolysis process, droplets of the liquid precursor are formed via ultrasonication (He and Wang, 2019;Ogi et al, 2020;Septiani et al, 2021;Le et al, 2022) and promptly carbonized at high temperatures under the protection of inert gases (Balgis et al, 2015;2017). The size and morphology of the resulting CSs can be adjusted by changing the reaction conditions, reactant concentration ratios, and carbonization temperature.…”

Section: Template-free Synthesis Of Carbon Spheresmentioning

confidence: 99%

Recent Advances in the Fabrication and Functionalization of Nanostructured Carbon Spheres for Energy Storage Applications

Cao

Iskandar

Tanabe

et al. 2023

KONA

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The development of energy storage devices providing high energy and power densities and long-term stability will play an important role in the future utilization of sustainable energy sources. Numerous efforts have been devoted to achieving these requirements, especially the design of advanced electrode materials. For this reason, there is growing interest in the innovation of new carbon-based materials with enhanced electrochemical performance. Nanostructured carbon spheres (CSs) have attracted significant attention due to their prominent properties, such as high surface area, excellent electrical conductivity, tunable porosity, and surface functionality. This review offers a comprehensive overview into the recent advances of nanostructured CSs within the last five years, focusing on synthetic strategies for producing carbon particles with precisely controlled morphologies and interior structures, as well as the potential applications of these particles as high-performance electrode materials in rechargeable batteries and supercapacitors. The challenges and perspectives on future research directions are highlighted, focusing on the controlled synthesis and functionalization of nanostructured CSs with tunable structures and properties that are well-suited to practical applications. This review is intended to serve as a helpful resource to researchers involved in the fabrication of new CS materials and the development of methods to control their structure and morphology.

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“…This group includes solvothermal synthesis (sometimes ultrasound-assisted) [27,28,44,51,53,63], microwave-assisted synthesis [26][27][28]44,53], photodeposition [29,44,64], synthesis in supercritical solvents [65], aerosol pyrolysis (spray pyrolysis and laser pyrolysis) [26,27,53,66], chemical exfoliation [53], and methods for nanoparticle or film growth from the gas phase (chemical vapor deposition [26,27,44,51,53,67], atomic layer deposition [48], etc. ), the growth of nanostructures by the liquid-crystal mechanism (hot injection [29], successive ionic layer adsorption (SILAR) [29,68] and other methods of layer-bylayer deposition [26,28,44,69]).…”

Section: How Photoactive Heterostructures Are Madementioning

confidence: 99%

“…The fabrication of some hierarchical composite structures, such as core-shell [26,44,66,76] and hollow [44,77] structures, requires an application of the specialized synthetic techniques. The template-assisted method is worth mentioning [44,78].…”

Section: How Photoactive Heterostructures Are Madementioning

confidence: 99%

Photoactive Heterostructures: How They Are Made and Explored

et al. 2021

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In our review we consider the results on the development and exploration of heterostructured photoactive materials with major attention focused on what are the better ways to form this type of materials and how to explore them correctly. Regardless of what type of heterostructure, metal–semiconductor or semiconductor–semiconductor, is formed, its functionality strongly depends on the quality of heterojunction. In turn, it depends on the selection of the heterostructure components (their chemical and physical properties) and on the proper choice of the synthesis method. Several examples of the different approaches such as in situ and ex situ, bottom-up and top-down, are reviewed. At the same time, even if the synthesis of heterostructured photoactive materials seems to be successful, strong experimental physical evidence demonstrating true heterojunction formation are required. A possibility for obtaining such evidence using different physical techniques is discussed. Particularly, it is demonstrated that the ability of optical spectroscopy to study heterostructured materials is in fact very limited. At the same time, such experimental techniques as high-resolution transmission electron microscopy (HRTEM) and electrophysical methods (work function measurements and impedance spectroscopy) present a true signature of heterojunction formation. Therefore, whatever the purpose of heterostructure formation and studies is, the application of HRTEM and electrophysical methods is necessary to confirm that formation of the heterojunction was successful.

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Rational Design of Efficient Semiconductor-based Photocatalysts via Microdroplets: A Review

Cited by 9 publications

References 105 publications

Synthesis of Cu-Trimesic Acid/Cu-1,4-Benzenedioic Acid via Microdroplets: Role of Component Compositions

Synthesis of Cu-Trimesic Acid/Cu-1,4-Benzenedioic Acid via Microdroplets: Role of Component Compositions

Recent Advances in the Fabrication and Functionalization of Nanostructured Carbon Spheres for Energy Storage Applications

Photoactive Heterostructures: How They Are Made and Explored

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