TY - JOUR
T1 - Tuning the morphology of electrosprayed BiVO4 from nanopillars to nanoferns via pH control for solar water splitting
AU - Kim, Min Woo
AU - Samuel, Edmund
AU - Kim, Karam
AU - Yoon, Hyun
AU - Joshi, Bhavana
AU - Swihart, Mark T.
AU - Yoon, Sam S.
N1 - Funding Information:
This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation ( NRF ) funded by the Ministry of Science, ICT & Future Planning (NRF-2016M1A2A2936760) and NRF-2017R1A2B4005639.
PY - 2018/11/15
Y1 - 2018/11/15
N2 - Electrosprayed BiVO4 adopts a nanopillar structure formed by diffusion-limited aggregation, which maximizes the surface area of the nanopillars. However, increasing the interfacial area between an electrode and the electrolyte through nanostructuring enhances the overall interfacial activity for solar water splitting. For this purpose, the pH of the precursor solution used for electrospraying BiVO4 was altered by adding ammonium hydroxide, thereby inducing a drastic change in the morphology of BiVO4. The previously demonstrated nanopillar morphology of electrosprayed BiVO4 was transformed into a nanofern structure that increased the photocurrent density of BiVO4 from 0.82 to 1.23 mA·cm−2 at 1.2 V vs. Ag/AgCl. The produced films were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and electrochemical impedance spectroscopy.
AB - Electrosprayed BiVO4 adopts a nanopillar structure formed by diffusion-limited aggregation, which maximizes the surface area of the nanopillars. However, increasing the interfacial area between an electrode and the electrolyte through nanostructuring enhances the overall interfacial activity for solar water splitting. For this purpose, the pH of the precursor solution used for electrospraying BiVO4 was altered by adding ammonium hydroxide, thereby inducing a drastic change in the morphology of BiVO4. The previously demonstrated nanopillar morphology of electrosprayed BiVO4 was transformed into a nanofern structure that increased the photocurrent density of BiVO4 from 0.82 to 1.23 mA·cm−2 at 1.2 V vs. Ag/AgCl. The produced films were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and electrochemical impedance spectroscopy.
KW - BiVO
KW - Electrostatic spray deposition
KW - Nanofern
KW - Nanopillar
KW - Photocurrent density
KW - Solar water splitting
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U2 - 10.1016/j.jallcom.2018.07.167
DO - 10.1016/j.jallcom.2018.07.167
M3 - Article
AN - SCOPUS:85050933433
VL - 769
SP - 193
EP - 200
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -