Synchronized effect of in-situ Ti doping and microwave-assisted SiOx hole transport channel on ZnFe2O4 nanocoral arrays for efficient photoelectrochemical water splitting

Periyasamy Anushkkaran; Mahadeo A. Mahadik; Jun Beom Hwang; Sarang Kim; Weon Sik Chae; Hyun Hwi Lee; Sun Hee Choi; Jum Suk Jang

doi:10.1016/j.apsusc.2022.153212

Synchronized effect of in-situ Ti doping and microwave-assisted SiO_x hole transport channel on ZnFe₂O₄ nanocoral arrays for efficient photoelectrochemical water splitting

Periyasamy Anushkkaran
, Mahadeo A. Mahadik
, Jun Beom Hwang
, Sarang Kim
, Weon Sik Chae
, Hyun Hwi Lee
, Sun Hee Choi^*
, Jum Suk Jang

^*Corresponding author for this work

Environmental Biotechnology

Research output: Contribution to journal › Journal article › peer-review

21 Scopus citations

Abstract

Photoelectrochemical (PEC) water splitting efficiency is limited by the high overpotential, severe recombination of photogenerated charges in bulk, and the surface of the photoanodes. Herein, we propose the SiO_x-modified Ti:ZnFe₂O₄ (Ti-ZFO/SiO_x) nanocorals array photoelectrode that integrates the in-situ Ti-doping and the second-order SiO_x hole transport channel via successive hydrothermal and microwave methods. In addition, introduction of a cocatalyst of cobalt phosphate (Co-Pi) on Ti-ZFO/SiO_x further accelerate hole transfer kinetics (surface charge seperation efficiency ∼ 90 %) in Ti-ZFO/SiO_x/CoPi compared to Ti-ZFO/CoPi. The optimized Ti-ZFO/SiO_x/CoPi nanocorals electrode achieves 1.6 times enhancement in photocurrent density (0.570 mA/cm²) at 1.23 V_RHE than Ti-ZFO. Furthermore, Ti-ZFO/SiO_x/CoPi photoelectrodes exhibited 70 and 34 µmol of H₂ and O₂, respectively, during 10 h real life PEC water splitting as well as and 50 h photocurrent stability. Therefore, our work is the foundational pilot for constructing the hole transport channel between the photoanode and electrolyte via the microwave method.

Original language	English
Article number	153212
Journal	Applied Surface Science
Volume	592
DOIs	https://doi.org/10.1016/j.apsusc.2022.153212
State	Published - 2022.08.1

Keywords

Hole transport channel
In-situ hydrothermal
Solar water splitting
Ti doping
Zinc ferrite nanocorals

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Physics & Astronomy

Access to Document

10.1016/j.apsusc.2022.153212

Cite this

Anushkkaran, P., Mahadik, M. A., Beom Hwang, J., Kim, S., Chae, W. S., Hwi Lee, H., Hee Choi, S., & Suk Jang, J. (2022). Synchronized effect of in-situ Ti doping and microwave-assisted SiO_x hole transport channel on ZnFe₂O₄ nanocoral arrays for efficient photoelectrochemical water splitting. Applied Surface Science, 592, Article 153212. https://doi.org/10.1016/j.apsusc.2022.153212

@article{09cce42864c34fdfb3abd5280df7d619,

title = "Synchronized effect of in-situ Ti doping and microwave-assisted SiOx hole transport channel on ZnFe2O4 nanocoral arrays for efficient photoelectrochemical water splitting",

abstract = "Photoelectrochemical (PEC) water splitting efficiency is limited by the high overpotential, severe recombination of photogenerated charges in bulk, and the surface of the photoanodes. Herein, we propose the SiOx-modified Ti:ZnFe2O4 (Ti-ZFO/SiOx) nanocorals array photoelectrode that integrates the in-situ Ti-doping and the second-order SiOx hole transport channel via successive hydrothermal and microwave methods. In addition, introduction of a cocatalyst of cobalt phosphate (Co-Pi) on Ti-ZFO/SiOx further accelerate hole transfer kinetics (surface charge seperation efficiency ∼ 90 \%) in Ti-ZFO/SiOx/CoPi compared to Ti-ZFO/CoPi. The optimized Ti-ZFO/SiOx/CoPi nanocorals electrode achieves 1.6 times enhancement in photocurrent density (0.570 mA/cm2) at 1.23 VRHE than Ti-ZFO. Furthermore, Ti-ZFO/SiOx/CoPi photoelectrodes exhibited 70 and 34 µmol of H2 and O2, respectively, during 10 h real life PEC water splitting as well as and 50 h photocurrent stability. Therefore, our work is the foundational pilot for constructing the hole transport channel between the photoanode and electrolyte via the microwave method.",

keywords = "Hole transport channel, In-situ hydrothermal, Solar water splitting, Ti doping, Zinc ferrite nanocorals",

author = "Periyasamy Anushkkaran and Mahadik, \{Mahadeo A.\} and \{Beom Hwang\}, Jun and Sarang Kim and Chae, \{Weon Sik\} and \{Hwi Lee\}, Hyun and \{Hee Choi\}, Sun and \{Suk Jang\}, Jum",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = aug,

day = "1",

doi = "10.1016/j.apsusc.2022.153212",

language = "English",

volume = "592",

journal = "Applied Surface Science",

issn = "0169-4332",

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Synchronized effect of in-situ Ti doping and microwave-assisted SiO_x hole transport channel on ZnFe₂O₄ nanocoral arrays for efficient photoelectrochemical water splitting. / Anushkkaran, Periyasamy; Mahadik, Mahadeo A.; Beom Hwang, Jun et al.
In: Applied Surface Science, Vol. 592, 153212, 01.08.2022.

Research output: Contribution to journal › Journal article › peer-review

TY - JOUR

T1 - Synchronized effect of in-situ Ti doping and microwave-assisted SiOx hole transport channel on ZnFe2O4 nanocoral arrays for efficient photoelectrochemical water splitting

AU - Anushkkaran, Periyasamy

AU - Mahadik, Mahadeo A.

AU - Beom Hwang, Jun

AU - Kim, Sarang

AU - Chae, Weon Sik

AU - Hwi Lee, Hyun

AU - Hee Choi, Sun

AU - Suk Jang, Jum

PY - 2022/8/1

Y1 - 2022/8/1

N2 - Photoelectrochemical (PEC) water splitting efficiency is limited by the high overpotential, severe recombination of photogenerated charges in bulk, and the surface of the photoanodes. Herein, we propose the SiOx-modified Ti:ZnFe2O4 (Ti-ZFO/SiOx) nanocorals array photoelectrode that integrates the in-situ Ti-doping and the second-order SiOx hole transport channel via successive hydrothermal and microwave methods. In addition, introduction of a cocatalyst of cobalt phosphate (Co-Pi) on Ti-ZFO/SiOx further accelerate hole transfer kinetics (surface charge seperation efficiency ∼ 90 %) in Ti-ZFO/SiOx/CoPi compared to Ti-ZFO/CoPi. The optimized Ti-ZFO/SiOx/CoPi nanocorals electrode achieves 1.6 times enhancement in photocurrent density (0.570 mA/cm2) at 1.23 VRHE than Ti-ZFO. Furthermore, Ti-ZFO/SiOx/CoPi photoelectrodes exhibited 70 and 34 µmol of H2 and O2, respectively, during 10 h real life PEC water splitting as well as and 50 h photocurrent stability. Therefore, our work is the foundational pilot for constructing the hole transport channel between the photoanode and electrolyte via the microwave method.

AB - Photoelectrochemical (PEC) water splitting efficiency is limited by the high overpotential, severe recombination of photogenerated charges in bulk, and the surface of the photoanodes. Herein, we propose the SiOx-modified Ti:ZnFe2O4 (Ti-ZFO/SiOx) nanocorals array photoelectrode that integrates the in-situ Ti-doping and the second-order SiOx hole transport channel via successive hydrothermal and microwave methods. In addition, introduction of a cocatalyst of cobalt phosphate (Co-Pi) on Ti-ZFO/SiOx further accelerate hole transfer kinetics (surface charge seperation efficiency ∼ 90 %) in Ti-ZFO/SiOx/CoPi compared to Ti-ZFO/CoPi. The optimized Ti-ZFO/SiOx/CoPi nanocorals electrode achieves 1.6 times enhancement in photocurrent density (0.570 mA/cm2) at 1.23 VRHE than Ti-ZFO. Furthermore, Ti-ZFO/SiOx/CoPi photoelectrodes exhibited 70 and 34 µmol of H2 and O2, respectively, during 10 h real life PEC water splitting as well as and 50 h photocurrent stability. Therefore, our work is the foundational pilot for constructing the hole transport channel between the photoanode and electrolyte via the microwave method.

KW - Hole transport channel

KW - In-situ hydrothermal

KW - Solar water splitting

KW - Ti doping

KW - Zinc ferrite nanocorals

UR - https://www.scopus.com/pages/publications/85127524072

U2 - 10.1016/j.apsusc.2022.153212

DO - 10.1016/j.apsusc.2022.153212

M3 - Journal article

AN - SCOPUS:85127524072

SN - 0169-4332

VL - 592

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 153212

ER -