Toward efficient photoelectrochemical water-splitting by using screw-like SnO2 nanostructures as photoanode after being decorated with CdS quantum dots

Zhang, Zemin; Gao, Caitian; Wu, Zimao; Han, Weihua; Wang, Yaling; Fu, Wenbin; Li, Xiaodong; Xie, Erqing

doi:10.1016/j.nanoen.2015.11.011

Cited by 141 publications

(48 citation statements)

References 50 publications

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“…Since the physical characteristics greatly depend on their structure, one of the main challenges in the field of materials science is to understand the correlation between them on a broad spectrum of length scales, starting from atomic level. In particular, for many nanoscale structures, quantum-like properties are frequently observable, thus displaying many interesting nano-effects [10][11][12]. However, for some materials, such as electrospun nanofibers, it has been shown that these effects depend strongly upon their fractal structure [9].…”

Section: Introductionmentioning

confidence: 99%

Structural Properties of Vicsek-like Deterministic Multifractals

et al. 2019

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Deterministic nano-fractal structures have recently emerged, displaying huge potential for the fabrication of complex materials with predefined physical properties and functionalities. Exploiting the structural properties of fractals, such as symmetry and self-similarity, could greatly extend the applicability of such materials. Analyses of small-angle scattering (SAS) curves from deterministic fractal models with a single scaling factor have allowed the obtaining of valuable fractal properties but they are insufficient to describe non-uniform structures with rich scaling properties such as fractals with multiple scaling factors. To extract additional information about this class of fractal structures we performed an analysis of multifractal spectra and SAS intensity of a representative fractal model with two scaling factors-termed Vicsek-like fractal. We observed that the box-counting fractal dimension in multifractal spectra coincide with the scattering exponent of SAS curves in mass-fractal regions. Our analyses further revealed transitions from heterogeneous to homogeneous structures accompanied by changes from short to long-range mass-fractal regions. These transitions are explained in terms of the relative values of the scaling factors.

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Section: Introductionmentioning

confidence: 99%

Structural Properties of Vicsek-like Deterministic Multifractals

et al. 2019

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“…The as-grown nanodisks have the lateral diameter of the nanodisks of about 150-250 nm, and the thickness can be decreased to about (17 ± 5) nm through controlling the concentration of sodium citrate. Zhang et al [176] reported the screw-like SnO 2 nanostructure formed by growing thread-like SnO 2 nanosheets (SNSs) onto rod-like single-crystalline SnO 2 nanowires (SNWs). First, the CVD growth method was used to prepare SnO 2 nanowire arrays with Au layers as catalysts.…”

Section: Preparation Of Homo/heterogeneous Branching Structuresmentioning

confidence: 99%

“…[118,[180][181][182][183]. CdS, CdSe, ZnS, ZnSe or their composites were usually deposited on ZnO, TiO 2 and SnO 2 arrays [73,176,182,[184][185][186][187]. For example, Zhang et al [188] reported on the preparation and PEC performance of the CdS/CdSe@ZnO core/shell nanoarrays.…”

Section: Type-ii Junctionmentioning

confidence: 99%

Current progress in developing metal oxide nanoarrays-based photoanodes for photoelectrochemical water splitting

et al. 2019

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“…Thus, the range of materials currently being studied for these applications is still extensively growing. Among them, tin oxides (mainly SnO 2 , but also Sn 3 O 4 and SnO), attract great scientific attention due to their unique semiconducting, optical, and electronic properties [16][17][18], which make them promising candidates for photoelectrochemical (PEC) [19] and photovoltaic applications [20]. They also have been considered as favorable materials for various energy storage systems, especially Li-ion and Na-ion batteries [21,22].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Nanoporous Sn/SnOx Systems Obtained by Anodic Oxidation of Electrochemically Deposited Sn Nanofoams

et al. 2020

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A simple two-step electrochemical method for the fabrication of a new type of hierarchical Sn/SnOx micro/nanostructures is proposed for the very first time. Firstly, porous metallic Sn foams are grown on Sn foil via hydrogen bubble-assisted electrodeposition from an acidulated tin chloride electrolyte. As-obtained metallic foams consist of randomly distributed dendrites grown uniformly on the entire metal surface. The estimated value of pore diameter near the surface is ~35 µm, while voids with a diameter of ~15 µm appear in a deeper part of the deposit. Secondly, a layer of amorphous nanoporous tin oxide (with a pore diameter of ~60 nm) is generated on the metal surface by its anodic oxidation in an alkaline electrolyte (1 M NaOH) at the potential of 4 V for various durations. It is confirmed that if only optimal conditions are applied, the dendritic morphology of the metal foam does not change significantly, and an open-porous structure is still preserved after anodization. Such kinds of hierarchical nanoporous Sn/SnOx systems are superhydrophilic, contrary to those obtained by thermal oxidation of metal foams which are hydrophobic. Finally, the photoelectrochemical activity of the nanostructured metal/metal oxide electrodes is also presented.

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Toward efficient photoelectrochemical water-splitting by using screw-like SnO2 nanostructures as photoanode after being decorated with CdS quantum dots

Cited by 141 publications

References 50 publications

Structural Properties of Vicsek-like Deterministic Multifractals

Structural Properties of Vicsek-like Deterministic Multifractals

Current progress in developing metal oxide nanoarrays-based photoanodes for photoelectrochemical water splitting

Hierarchical Nanoporous Sn/SnOx Systems Obtained by Anodic Oxidation of Electrochemically Deposited Sn Nanofoams

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