Marangoni ring-templated vertically aligned ZnO nanotube arrays with enhanced photocatalytic hydrogen production

Lee, Wei Cheat; Fang, Yuanxing; Kler, Rantej; Canciani, Giacomo E.; Draper, Thomas C.; Alabdullah, Zainab T. Y.; Alfadul, Sulaiman M.; Perry, Christopher C.; He, Heyong; Chen, Qiao

doi:10.1016/j.matchemphys.2014.10.046

Cited by 26 publications

(31 citation statements)

References 19 publications

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“…The surface area to volume ratio (SAVR) determines the geometry effects on the reaction kinetics for gas or liquid at solid surface [5]. Based on the measured morphological dimensions in Table 1, the surface area to volume ratio (SAVR) values were calculated to be 0.0181, 0.0110, 0.0175, 0.0184 and 0.0194 nm -1 for pristine ZnO, Ni-, Co-, K-and Na-doped ZnO NR arrays, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The substrates, titanium plates (2 × 2 cm 2 ; Rudgwick Metals) were polished, cleaned under sonication in an isopropanol bath for 15 minutes, and dried in air prior to NR synthesis. ZnO NRs were prepared by CBD method as described elsewhere [5]. In this work, 0.10 M of seeding solution and 20 mM of growth solution were used.…”

Section: Preparation Of Catalystsmentioning

confidence: 99%

“…Many different metal oxide nanostructures such as ZnO [5], TiO2 [6], Fe2O3 [7], and WO3 [8], have been studied for their potential application in PEC water splitting. Of these semiconductors, ZnO has been recognised as a promising photoanodic material owing to its appropriate band edges, high electron mobility, low electrical resistance and high electron-transfer efficiency [4,9].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced photoelectrochemical water oxidation by ZnxMyO (M = Ni, Co, K, Na) nanorod arrays

Lee

Canciani

Alwhshe

et al. 2016

International Journal of Hydrogen Energy

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The present work reports a facile approach to the one-pot solution growth of vertically aligned, doped ZnO nanorod (NR) arrays by chemical bath deposition (CBD). The effects of dopant ions on the final morphologies, electronic band structures and donor densities of ZnO were examined. With the introduction of dopants, the optical band gap energies of the samples were reduced. The photoelectrochemical (PEC) water splitting performances of the doped ZnO NRs were tested. When compared with pristine ZnO NRs, the doped ZnO NRs demonstrated an improvement of at least 15% in the PEC water splitting activity. Na-doped ZnO NRs was the most efficient anode, where its photocurrent density was 2.1 times greater than that of pristine ZnO NRs. The mechanism for improved PEC performance was proposed.

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Section: Resultsmentioning

confidence: 99%

Section: Preparation Of Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced photoelectrochemical water oxidation by ZnxMyO (M = Ni, Co, K, Na) nanorod arrays

Lee

Canciani

Alwhshe

et al. 2016

International Journal of Hydrogen Energy

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“…Rathore et al presented a growth mechanism of polarity controlled ZnO nanorods array on a glass/FTO substrate by a chemical bath deposition and found that anions of the Zn‐salt affect the preferred orientation of growth . Lee et al reported a novel approach for the synthesis of ZnO nanotube arrays (ring‐like structures) using the polymer‐based seeding solution through the Marangoni mechanism, guiding the growth of ZnO nanotubes with aqueous chemical bath deposition .…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline and monophasic thin films of metal chalcogenide (FeS, ZnS) and oxide (ZnO) by chemical bath deposition (CBD)

Akhtar

Mehmood

Ahmad

et al. 2017

Phys. Status Solidi A

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FeS, ZnS, and ZnO nanostructured thin films have been deposited by Chemical Bath Deposition (CBD), a simple and cost effective technique. These materials with different morphologies such as nano‐flakes, nanoparticles and nanorods for FeS, ZnS, and ZnO, respectively were deposited onto the glass substrates. The crystallite sizes have been estimated from Scherrer's equation and were found to be 14 nm for nano‐flakes of FeS, 9.09 nm for nanoparticles of ZnS, and 49 nm for nanorods of ZnO. The average values of the band gaps were found to be 1.97, 3.43, and 3.74 eV for FeS, ZnO, and ZnS thin films, respectively. These nanostructured semiconducting materials have wide applications in advanced optoelectronic devices.

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“…In order to solve these problems, the immobilization photocatalyst such as ZnO thin film was prepared. Up to now, many different methods were used to obtain ZnO thin film, such as the chemical bath deposition method (CBD) , pulsed laser deposition (PLD) , the hydrothermal method , the sol‐gel process , metal‐organic chemical vapor deposition (MOCVD) , radio‐frequency magnetron sputtering , molecular beam epitaxy and so on. Among these techniques, the CBD method is an attractive technique to prepare ZnO films due to its great advantages in both low cost and environment friendliness, and this technique is a process well suited to large‐scale production.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO films in different solvents and their photocatalytic activities

Yang

Bing

et al. 2015

Crystal Research and Technology

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ZnO thin films have been successfully synthesized via the chemical bath deposition (CBD) method without using any catalysts or templates. The effects of solvents (such as water, ethanol and n‐propanol) on structure and morphology of ZnO thin films have been studied. XRD analysis showed that all ZnO thin films with wurtzite crystal structure were obtained via various solvents. SEM images showed that ZnO thin films prepared in different solvents have different sizes and morphologies. TEM images showed that crystalline ZnO samples prepared in different solvents have different growth habits. Photoluminescence and photocatalysis properties have been investigated at room temperature. ZnO thin films prepared in water showed superior photocatalytic activity in the degradation of rhodamine B (RhB) compared to other samples.

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Marangoni ring-templated vertically aligned ZnO nanotube arrays with enhanced photocatalytic hydrogen production

Cited by 26 publications

References 19 publications

Enhanced photoelectrochemical water oxidation by ZnxMyO (M = Ni, Co, K, Na) nanorod arrays

Enhanced photoelectrochemical water oxidation by ZnxMyO (M = Ni, Co, K, Na) nanorod arrays

Nanocrystalline and monophasic thin films of metal chalcogenide (FeS, ZnS) and oxide (ZnO) by chemical bath deposition (CBD)

Synthesis of ZnO films in different solvents and their photocatalytic activities

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