Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7990004 | Journal of Alloys and Compounds | 2018 | 26 Pages |
Abstract
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 1.23â¯mA·cmâ2 at 1.2â¯V vs. Ag/AgCl. The produced films were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and electrochemical impedance spectroscopy.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Min-Woo Kim, Edmund Samuel, Karam Kim, Hyun Yoon, Bhavana Joshi, Mark T. Swihart, Sam S. Yoon,