Anodized ZnO nanostructures for photoelectrochemical water splitting

Huang, Mao Chia; Wang, TsingHai; Wu, Bin; Lin, Jiaping; Wu, Chien-Hsing

doi:10.1016/j.apsusc.2015.09.174

Cited by 43 publications

(26 citation statements)

References 42 publications

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“…pure ZnO. 5,28,58 The finger print of zinc(II) oxide occurrence was provided by the evaluation of the Auger α parameter (α = 2010.3 eV), in excellent agreement with previous literature data. 64,67 The surface O1s signal (Figure 2b) resulted from two concurrent contributions: (I), located at BE eV, assigned to surface −OH groups, whose presence is typically observed on a ZnO surfaces.…”

Section: Resultssupporting

confidence: 82%

“…64,67 The surface O1s signal (Figure 2b) resulted from two concurrent contributions: (I), located at BE eV, assigned to surface −OH groups, whose presence is typically observed on a ZnO surfaces. 5,64 Accordingly, the O/Zn surface ratio (typically close to 1.3) was slightly higher than 1, the value expected for stoichiometric ZnO.…”

Section: Resultsmentioning

confidence: 90%

“…11,[30][31][32][33][34][35] The tailoring of zinc oxide chemical, physical and functional properties as a function of the size and shape of ZnO building blocks offers a huge possibility for a variety of technological enduses. 34,[36][37][38][39][40] The latter encompass, among others, transparent conducting oxides, 9,14,41 (photo)catalysts for various processes, [35][36][42][43][44][45] light emitting diodes 2,46 and lasers, 30,39 electrodes for dye-sensitized 1,17,23,47 and photoelectrochemical cells, 5,36,[48][49][50] nanostructured films with for anti-fogging and self-cleaning applications, 30,38,[51][52] as well as nanoscale transducers, field emitters, resonators 1,13,16,53 and solid state gas sensors. 11,22,46 Therefore, various preparation routes 15,…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Controlled Growth of Supported ZnO Inverted Nanopyramids with Downward Pointing Tips

Barreca

Carraro

Maccato

et al. 2018

Crystal Growth & Design

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High purity porous ZnO nanopyramids with controllable properties are grown on their tips on Si(100) substrates by means of a catalyst-free vapor phase deposition route in a wet oxygen reaction environment. The system degree of preferential [001] orientation, as well as nanopyramid size, geometrical shape and density distribution, can be finely tuned by varying the growth temperature between 300 and 400°C, whereas higher temperatures lead to more compact systems with a three-dimensional (3D) morphology. A growth mechanism of the obtained ZnO nanostructures based on a self-catalytic vapor-solid (VS) mode is proposed, in order to explain the evolution of nanostructure morphologies as a function of the adopted process conditions. The results obtained by a thorough chemico-physical characterization enable to get an improved control over the properties of ZnO nanopyramids grown by this technique. Taken together, they are of noticeable importance not only for fundamental research on ZnO nanomaterials with controlled nano-organization, but also to tailor ZnO functionalities in view of various potential applications.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Controlled Growth of Supported ZnO Inverted Nanopyramids with Downward Pointing Tips

Barreca

Carraro

Maccato

et al. 2018

Crystal Growth & Design

View full text Add to dashboard Cite

show abstract

“…ZnO catalysts have been synthesised by various methods such as hydrothermal syntheses, 33,34 chemical vapour deposition, 35,36 sol‐gel chemistry, 37,38 and anodic oxidation 39‐41 . In particular, the anodic oxidation of Zn in an aqueous system is the commonly used method for forming nanostructured ZnO for general catalytic applications 39‐43 .…”

Section: Introductionmentioning

confidence: 99%

Solution‐phase‐reconstructed Zn‐based nanowire electrocatalysts for electrochemical reduction of carbon dioxide to carbon monoxide

Kim

Han

et al. 2020

Int J Energy Res

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Summary The production of CO via electrochemical CO2 reduction has been recognised as a promising technology that overcomes the environmental issues caused by global warming. It also facilitates the conversion of CO2 into energy sources. Earth‐abundant Zn is a well‐known alternative to noble metal catalysts such as Au and Ag for the electrochemical CO2 reduction to CO. In particular, Zn‐based materials in the form of nanowires are potentially applicable as electrocatalysts in the electrochemical CO2 reduction. However, the conventional methods for manufacturing the nanowire structure are difficult as they require harsh conditions such as high temperatures and excess energy. In this study, Zn‐based nanowire catalysts are prepared by the facile electrodeposition of Zn nanostructures on a substrate followed by their energy‐free solution‐phase reconstitution. Further, their electrochemical performance in the CO2 reduction is investigated in a CO2‐purged 0.5 M KHCO3 electrolyte. By optimising the deposition conditions, hexagonal Zn (h‐Zn) plates with dominant Zn(101) facets, the favoured crystal structure for CO2 reduction, are fabricated on carbon paper. Furthermore, it is found that, during the solution‐phase reconstruction over 16 hours, the h‐Zn plate transforms to a nanowire owing to the differences between the oxidation rates of different crystal facets and the formation of a hydroxide complex. The activity of the reconstructed Zn‐based nanowire catalyst is enhanced further by forming an oxide layer via thermal treatment in a H2 atmosphere. This treatment boosted the reaction kinetics, thereby enhancing the catalyst performance in the CO2 reduction.

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“…In PEC sensors, a sequence of charge transfer processes has to occur between the analyte, photocatalytic material and electrode so that the output photocurrent can be effectively utilized 95 . Some metal oxide semiconductor nanoparticles such as ZnO, ZrO 2 and TiO 2 have been used as significant PEC materials [96][97][98][99][100][101][102] . Especially TiO 2 has been intensively investigated for several PEC applications due to its nontoxicity, strong oxidizing power, hydrophilicity, cheap availability, biological and chemical inertness, and stability 92 …”

Section: Photoelectrochemical Biosensorsmentioning

confidence: 99%

Cholinesterase-based biosensors

Štěpánková

Vorčáková

2016

Journal of Enzyme Inhibition and Medicinal Chemistry

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Recently, cholinesterase-based biosensors are widely used for assaying anticholinergic compounds. Primarily biosensors based on enzyme inhibition are useful analytical tools for fast screening of inhibitors, such as organophosphates and carbamates. The present review is aimed at compilation of the most important facts about cholinesterase based biosensors, types of physico-chemical transduction, immobilization strategies and practical applications.

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Anodized ZnO nanostructures for photoelectrochemical water splitting

Cited by 43 publications

References 42 publications

Controlled Growth of Supported ZnO Inverted Nanopyramids with Downward Pointing Tips

Controlled Growth of Supported ZnO Inverted Nanopyramids with Downward Pointing Tips

Solution‐phase‐reconstructed Zn‐based nanowire electrocatalysts for electrochemical reduction of carbon dioxide to carbon monoxide

Cholinesterase-based biosensors

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