Highly photoactive Ti-doped α-Fe2O3 nanorod arrays photoanode prepared by a hydrothermal method for photoelectrochemical water splitting

Fu, Zewen; Jiang, Tengfei; Liu, Zhipeng; Wang, Dejun; Wang, Lingling; Xie, Tengfeng

doi:10.1016/j.electacta.2014.02.132

Cited by 142 publications

(90 citation statements)

References 38 publications

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“…Thus most efficient hematite photoanodes have been made by chemical vapor deposition [5,10]. A versatile synthesis procedure, allowing performance optimization by doping, has been obtained by the hydrothermal route [11][12][13][14]. An equally versatile, room temperature procedure for hematite film formation and doping is by electrodeposition [6][7][8]15,16].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposited Ti-doped hematite photoanodes and their employment for photoelectrocatalytic hydrogen production in the presence of ethanol

Kalamaras

Dracopoulos

Sygellou

et al. 2016

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Electrodeposited Ti-doped hematite photoanodes and their employment for photoelectrocatalytic hydrogen production in the presence of ethanol

Kalamaras

Dracopoulos

Sygellou

et al. 2016

Chemical Engineering Journal

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“…This reduced effective band gap is lower than those of both pure TiO 2 and ZnO. Moreover, this band gap narrowing and extension of the absorption edge toward higher wavelengths enable visible light driven photocatalytic and photoelectrochemical water splitting which is a hot research topic in recent years [14,[22][23][24]. In order to investigate the impact of ZnO interfacial layer in the device PV performance, current-voltage (J-V) characteristics of different cells are measured by a Keithley 2440 source meter (AM1.5 G, 100 mW/cm 2 ).…”

Section: Resultsmentioning

confidence: 99%

Enhanced Performance of Nanowire-Based All-TiO2 Solar Cells using Subnanometer-Thick Atomic Layer Deposited ZnO Embedded Layer

Ghobadi

Yavuz

Ghobadi

et al. 2015

Electrochimica Acta

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In this paper, the effect of angstrom-thick atomic layer deposited (ALD) ZnO embedded layer on photovoltaic (PV) performance of Nanowire-Based All-TiO 2 solar cells has been systematically investigated. Our results indicate that by varying the thickness of ZnO layer the efficiency of the solar cell can be significantly changed. It is shown that the efficiency has its maximum for optimal thickness of 1 ALD cycle in which this ultrathin ZnO layer improves device performance through passivation of surface traps without hampering injection efficiency of photogenerated electrons. The mechanisms contributing to this unprecedented change in PV performance of the cell have been scrutinized and discussed.

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“…[6][7][8][9] Particularly, Ti-doping largely enhanced the PEC performance of hematite nanorods, which was attributed to improved donor density and reduced the electron-hole recombination rate. [10][11][12][13] Despite the rapid advances in this direction, it remains a great challenge to approach the theoretical efficiency limit of hematite-based PEC. It is envisioned that better control of the Tidoping amount and morphology should be beneficial to the PEC performance.…”

Section: Introductionmentioning

confidence: 99%

Uniform Doping of Titanium in Hematite Nanorods for Efficient Photoelectrochemical Water Splitting

Wang

Chen

Chang

et al. 2015

ACS Appl. Mater. Interfaces

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Doping elements in hematite nanostructures is a promising approach to improve the photoelectrochemical (PEC) water-splitting performance of hematite photoanodes. However, uniform doping with precise control on doping amount and morphology is the major challenge for quantitatively investigating the PEC water-splitting enhancement. Here, we report on the design and synthesis of uniform titanium (Ti)-doped hematite nanorods with precise control of the Ti amount and morphology for highly effective PEC water splitting using an atomic layer deposition assisted solid-state diffusion method. We found that Ti doping promoted band bending and increased the carrier density as well as the surface state. Remarkably, these uniformly doped hematite nanorods exhibited high PEC performance with a pronounced photocurrent density of 2.28 mA/cm(2) at 1.23 V vs reversible hydrogen electrode (RHE) and 4.18 mA/cm(2) at 1.70 V vs RHE, respectively. Furthermore, as-prepared Ti-doping hematite nanorods performed excellent repeatability and durability; over 80% of the as-fabricated photoanodes reproduced the steady photocurrent density of 1.9-2.2 mA/cm(2) at 1.23 V vs RHE at least 3 h in a strong alkaline electrolyte solution.

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Highly photoactive Ti-doped α-Fe2O3 nanorod arrays photoanode prepared by a hydrothermal method for photoelectrochemical water splitting

Cited by 142 publications

References 38 publications

Electrodeposited Ti-doped hematite photoanodes and their employment for photoelectrocatalytic hydrogen production in the presence of ethanol

Electrodeposited Ti-doped hematite photoanodes and their employment for photoelectrocatalytic hydrogen production in the presence of ethanol

Enhanced Performance of Nanowire-Based All-TiO2 Solar Cells using Subnanometer-Thick Atomic Layer Deposited ZnO Embedded Layer

Uniform Doping of Titanium in Hematite Nanorods for Efficient Photoelectrochemical Water Splitting

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