Thickness control in electrophoretic deposition of WO3 nanofiber thin films for solar water splitting

Fang, Yuanxing; Lee, Wei Cheat; Canciani, Giacomo E.; Draper, Thomas C.; Al-Bawi, Zainab F.; Bedi, Jasbir Singh; Perry, Christopher C.; Chen, Qiao

doi:10.1016/j.mseb.2015.09.005

Cited by 42 publications

(24 citation statements)

References 58 publications

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“…Conductive metal oxides, such as ZnO, can be achieved by doping with metals such as Na, Al and Y [26][27][28][29][30][31]. Such highly conductive metal oxides have been widely used in optoelectronic applications [32][33][34][35]. In the field of gas sensors, the application of conductive ZnO NRs is limited to chemical sensors [36][37][38][39], while currently there is no reported application in the field of GISs.…”

Section: Introductionmentioning

confidence: 99%

An enhanced gas ionization sensor from Y-doped vertically aligned conductive ZnO nanorods

Lee

Fang

Turner

et al. 2016

Sensors and Actuators B: Chemical

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A stable and highly sensitive gas ionization sensor (GIS) constructed from vertically aligned, conductive yttrium-doped ZnO nanorod (YZO NR) arrays is demonstrated. The conductive YZO NRs are synthesized using a facile one-pot hydrothermal method. At higher Y/Zn molar ratio, the aspect ratio of the YZO NRs is increased from 11 to 25. Doping with yttrium atoms decreases the electrical resistivity of ZnO NRs more than 100 fold. GIS measurements reveal a 6-fold enhancement in the sensitivity accompanied with a significant reduction in breakdown voltage from the highly conductive YZO NRs. Direct correlations between the resistivity of the NRs and GIS characteristics are established. 1 An Enhanced Gas Ionization Sensor from Y-doped Vertically Aligned Conductive ZnO Nanorods AbstractA stable and highly sensitive gas ionization sensor (GIS) constructed from vertically aligned, conductive yttrium-doped ZnO nanorod (YZO NR) arrays is demonstrated. The conductive YZO NRs are synthesized using a facile one-pot hydrothermal method. At higher Y/Zn molar ratio, the aspect ratio of the YZO NRs is increased from 11 to 25. Doping with yttrium atoms decreases the electrical resistivity of ZnO NRs more than 100 fold. GIS measurements reveal a 6-fold enhancement in the sensitivity accompanied with a significant reduction in breakdown voltage from the highly conductive YZO NRs. Direct correlations between the resistivity of the NRs and GIS characteristics are established.

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Section: Introductionmentioning

confidence: 99%

An enhanced gas ionization sensor from Y-doped vertically aligned conductive ZnO nanorods

Lee

Fang

Turner

et al. 2016

Sensors and Actuators B: Chemical

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“…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%

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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“…The surface morphologies of the WO 3 thin films were analyzed using a high-resolution field-emission scanning electron microscope (FESEM, S-4800, Hitachi, Japan). Crystallization was analyzed using a multifunction high-power X-ray diffractometer (XRD, D8 Discover SSS, Bruker, the Netherlands) with Cu K radiation, and all peaks measured by XRD were assigned by comparing them with those in the data of the International Centre for Diffraction Data [29].…”

Section: Characterizationmentioning

confidence: 99%

Electrodeposition-Based Fabrication and Characteristics of Tungsten Trioxide Thin Film

Cheng

Teng

2016

Journal of Nanomaterials

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In this study, tungsten trioxide (WO3) thin films were electrodeposited on indium tin oxide (ITO) glass to form WO3-coated glass. The electrodeposition (ED) time (tED) and ED current (IED) were varied to control the film thickness and morphology. Furthermore, the crystallization of the thin films was controlled by annealing them at 250°C, 500°C, and 700°C. The results showed that the thickness of the WO3thin films increased withtEDandIED. The as-deposited thin films and those annealed at 250°C were amorphous, whereas the WO3thin films annealed at 500 and 700°C were in the anorthic phase. Moreover, the amorphous WO3-coated glass exhibited high transmittance in visible light and low transmittance in near-infrared light, whereas the anorthic WO3-coated glass had high transmittance in near-infrared light. An empirical formula for determining the thickness of WO3thin films was derived through multiple regressions of the ED process parameters.

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Thickness control in electrophoretic deposition of WO3 nanofiber thin films for solar water splitting

Cited by 42 publications

References 58 publications

An enhanced gas ionization sensor from Y-doped vertically aligned conductive ZnO nanorods

An enhanced gas ionization sensor from Y-doped vertically aligned conductive ZnO nanorods

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

Electrodeposition-Based Fabrication and Characteristics of Tungsten Trioxide Thin Film

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