Recent progress in the syntheses and applications of multishelled hollow nanostructures

Zhu, Maiyong; Tang, Jingjing; Wei, Wenjing; Li, Songjun

doi:10.1039/c9qm00700h

Cited by 68 publications

(32 citation statements)

References 260 publications

(249 reference statements)

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“…Hollow multishelled structures (HoMSs) with highly tunable geometric (shell number, shell spacing, shell thickness, and porosity) and compositional parameters, have shown great promise in various fields, such as catalysis, battery, adsorption, drug delivery, supercapacitor, solar cells, sensors, photodetectors, and upconversion photoluminescence . Moreover, the intrinsic properties of HoMSs, such as adjustable hydrophilic and aerophobic surface and short charge transport path, make HoMSs promising catalyst for surface reactions (Scheme ).…”

Section: Methodsmentioning

confidence: 99%

Dual‐Defects Adjusted Crystal‐Field Splitting of LaCo_1−xNi_xO_3−δHollow Multishelled Structures for Efficient Oxygen Evolution

et al. 2020

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To boost the performance for various applications, a rational bottom‐up design on materials is necessary. The defect engineering on nanoparticle at the atomic level can efficiently tune the electronic behavior, which offers great opportunities in enhancing the catalytic performance. In this paper, we optimized the surface oxygen vacancy concentration and created the lattice distortion in rare‐earth‐based perovskite oxide through gradient replacement of the B site with valence alternated element. The dual defects make the electron spin state transit from low spin state to high spin state, thus decreasing the charge transport resistance. Furthermore, assembly the modified nanoparticle subunits into the micro‐sized hollow multishelled structures can provide porous shells, abundant interior space and effective contact, which enables an enhanced mass transfer and a shorter charge transport path. As a result, the systemic design in the electronic and nano‐micro structures for catalyst has brought an excellent oxygen evolution performance.

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Section: Methodsmentioning

confidence: 99%

Dual‐Defects Adjusted Crystal‐Field Splitting of LaCo_1−xNi_xO_3−δHollow Multishelled Structures for Efficient Oxygen Evolution

et al. 2020

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“…Reducing the particle size to the nanometric range and optimizing the morphology of the perovskite electrocatalysts are conducive to obtaining a larger three‐phase reaction interface, increasing the number of exposed active sites and oxygen pathways, promoting the charge and mass transport and thus achieving excellent electrocatalytic activity. [ 74 ] Nanostructured perovskite has been designed and proved to be an effective way to improve the mass activity of electrocatalysts for perovskite. [ 75–77 ] In general, nanostructural perovskite can be prepared through wet‐chemical synthesis, deposition‐based approaches, electrospinning and template‐assisted synthesis, and detailed preparation methods of nanostructural perovskite are available elsewhere.…”

Section: Activation Strategies For Perovskite‐type Structurementioning

confidence: 99%

Activation Strategies of Perovskite‐Type Structure for Applications in Oxygen‐Related Electrocatalysts

et al. 2021

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The oxygen‐related electrochemical process, including the oxygen evolution reaction and oxygen reduction reaction, is usually a kinetically sluggish reaction and thus dominates the whole efficiency of energy storage and conversion devices. Owing to the dominant role of the oxygen‐related electrochemical process in the development of electrochemical energy, an abundance of oxygen‐related electrocatalysts is discovered. Among them, perovskite‐type materials with flexible crystal and electronic structures have been researched for a long time. However, most perovskite materials still show low intrinsic activity, which highlights the importance of activation strategies for perovskite‐type structures to improve their intrinsic activity. In this review, the recent progress of the activation strategies for perovskite‐type structures is summarized and their related applications in oxygen‐related electrocatalysis reactions, including electrochemistry water splitting, metal–air batteries, and solid oxide fuel cells are discussed. Furthermore, the existing challenges and the future perspectives for the designing of ideal perovskite‐type structure catalysts are proposed and discussed.

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“…This unique hollow structures can not only reduce the energy loss during the light transportation, but also provide large effective surface areas for photocatalytic reactions. [59] More importantly, the thin shells constructed by the 0D subunits decrease the diffusion length of minority carriers, thus suppress the charge recombination. [60] However, due to the difficulties in the synthesis of WO 3 HoMSs, reports on their photocatalytic applications are still scarce.…”

Section: D Tungsten Oxidesmentioning

confidence: 99%

Multidimensional Tungsten Oxides for Efficient Solar Energy Conversion

Zhang

Wei

2021

Small Structures

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Atoms, molecules, crystal cells, and amino acids, which are all small structures, construct higher-ordered frameworks/ aggregates with varied morphologies and dynamic transformability. [1] Dimensionalities of materials are easily changed with the same subunits: different arrangements of carbon atoms give birth to 2D graphite or 3D diamonds with distinct physical properties, different assembly behaviors of supramolecule subunits result in 1D nanoribbons or 2D nanosheets with contrasting optical characters, and different folding pathways of peptides lead to the flourishing development of 3D hierarchical proteins. Consequently, studying a certain kind of material calls for the elaborated investigating of its various forms in all dimensions.Reviewing the effects of dimensionality on the physicochemical properties of the materials is helpful to untangle the twisted structure-performance correlation, which would be instructive from the particular to the general material design. [2] Among the photoactive semiconductor materials used in solar energy conversion, tungsten oxide (WO 3 ) is undoubtedly an evergreen tree. [3] WO 3 is an n-type semiconductor with a moderate bandgap of %2.7 eV, which allows its light absorption of a wide range of solar energy spectrum. [4] Moreover, it is gifted with superior electron transportability (%12cm 2 V À1 s À1 ) compared with TiO 2 (%0.3 cm 2 V À1 s À1 ) and moderate hole diffusion length (%150 nm) compared with α-Fe 2 O 3 (%2-4 nm). [5] Generally, WO 3 exhibits high oxidizing ability because of its sufficient positive valence band (VB) maximum and excellent chemical stability in acidic conditions (pH > 3). [6] To date, the synthetic methods, crystal structures, surface states, and applications of WO 3 materials have been intensively studied. [3a,7] Excellent review articles include not only the WO 3 -based nanostructures, [8] nanocomposites, [7c] oxygen deficiencies, [9] but also their application in photoelectrochemical water splitting, [10] wastewater treatment, [11] and photochromism. [12] Since the electronic dimensionality of WO 3 is closely related to the number of degrees of spatial confinement of electrons, 0D with strong spatial confinement effects and 1D/ 2D WO 3 materials with more than one degree of spatial confinement of its electronic wave functions have attracted particular interest for photoenergy conversions. [13] Furthermore, the 3D-ordered assemblies of low-dimensional WO 3 subunits would

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Recent progress in the syntheses and applications of multishelled hollow nanostructures

Abstract: This review summarizes the synthesis methods for fabricating multishelled hollow nanostructures and provides views for such intricate hollow architectures in several emerging application areas.

Cited by 68 publications

References 260 publications

Dual‐Defects Adjusted Crystal‐Field Splitting of LaCo_1−xNi_xO_3−δHollow Multishelled Structures for Efficient Oxygen Evolution

Dual‐Defects Adjusted Crystal‐Field Splitting of LaCo_1−xNi_xO_3−δHollow Multishelled Structures for Efficient Oxygen Evolution

Activation Strategies of Perovskite‐Type Structure for Applications in Oxygen‐Related Electrocatalysts

Multidimensional Tungsten Oxides for Efficient Solar Energy Conversion

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Recent progress in the syntheses and applications of multishelled hollow nanostructures

Abstract: This review summarizes the synthesis methods for fabricating multishelled hollow nanostructures and provides views for such intricate hollow architectures in several emerging application areas.

Cited by 68 publications

References 260 publications

Dual‐Defects Adjusted Crystal‐Field Splitting of LaCo1−xNixO3−δHollow Multishelled Structures for Efficient Oxygen Evolution

Dual‐Defects Adjusted Crystal‐Field Splitting of LaCo1−xNixO3−δHollow Multishelled Structures for Efficient Oxygen Evolution

Activation Strategies of Perovskite‐Type Structure for Applications in Oxygen‐Related Electrocatalysts

Multidimensional Tungsten Oxides for Efficient Solar Energy Conversion

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Dual‐Defects Adjusted Crystal‐Field Splitting of LaCo_1−xNi_xO_3−δHollow Multishelled Structures for Efficient Oxygen Evolution

Dual‐Defects Adjusted Crystal‐Field Splitting of LaCo_1−xNi_xO_3−δHollow Multishelled Structures for Efficient Oxygen Evolution