Effect of Electrolytes on the BiOI/SnO<sub>2</sub> Heterostructure to Achieve Stable Photo-Induced Carrier Generation
Heterostructures have recently been used to generate stable photo-induced currents via photoelectrochemical (PEC) activity. However, the effect of electrolytes on charge-transfer kinetics and the generation of photo-induced currents on heterostructures are major challenges in PEC. The effect of the...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/12/1727 |
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| author | I. Neelakanta Reddy Bhargav Akkinepally Cheolho Bai Jaesool Shim |
| author_facet | I. Neelakanta Reddy Bhargav Akkinepally Cheolho Bai Jaesool Shim |
| author_sort | I. Neelakanta Reddy |
| collection | DOAJ |
| description | Heterostructures have recently been used to generate stable photo-induced currents via photoelectrochemical (PEC) activity. However, the effect of electrolytes on charge-transfer kinetics and the generation of photo-induced currents on heterostructures are major challenges in PEC. The effect of the electrolyte on the synthesized photoelectrodes is demonstrated in this study under various conditions using electrochemical impedance spectroscopy, linear sweep voltammetry, chronoamperometry, and Tafel analyses. The lowest transfer kinetics resistance and highest photocurrent densities are achieved in 0.1 M KOH when compared to those in 0.1 M Na<sub>2</sub>SO<sub>4</sub> aqueous electrolytes. Furthermore, various applied voltage effects on the generation of currents have been studied for the synthesized electrodes at a voltage of +0.5 V in both electrolytes. The maximum induced-current achieved was 1.39 mA cm<sup>−2</sup> for BW-SO, under illumination in the 0.1 M KOH electrolyte. The BW-SO heterostructure presented enhanced performance due to improved light absorption capability, the lowest resistance values, and the synergistic effect of the heterostructures. |
| first_indexed | 2024-03-09T17:10:31Z |
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| id | doaj.art-a147eb91c49c4985881266d60f5de12e |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T17:10:31Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-a147eb91c49c4985881266d60f5de12e2023-11-24T14:09:55ZengMDPI AGCrystals2073-43522022-11-011212172710.3390/cryst12121727Effect of Electrolytes on the BiOI/SnO<sub>2</sub> Heterostructure to Achieve Stable Photo-Induced Carrier GenerationI. Neelakanta Reddy0Bhargav Akkinepally1Cheolho Bai2Jaesool Shim3School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of KoreaSchool of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of KoreaSchool of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of KoreaSchool of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of KoreaHeterostructures have recently been used to generate stable photo-induced currents via photoelectrochemical (PEC) activity. However, the effect of electrolytes on charge-transfer kinetics and the generation of photo-induced currents on heterostructures are major challenges in PEC. The effect of the electrolyte on the synthesized photoelectrodes is demonstrated in this study under various conditions using electrochemical impedance spectroscopy, linear sweep voltammetry, chronoamperometry, and Tafel analyses. The lowest transfer kinetics resistance and highest photocurrent densities are achieved in 0.1 M KOH when compared to those in 0.1 M Na<sub>2</sub>SO<sub>4</sub> aqueous electrolytes. Furthermore, various applied voltage effects on the generation of currents have been studied for the synthesized electrodes at a voltage of +0.5 V in both electrolytes. The maximum induced-current achieved was 1.39 mA cm<sup>−2</sup> for BW-SO, under illumination in the 0.1 M KOH electrolyte. The BW-SO heterostructure presented enhanced performance due to improved light absorption capability, the lowest resistance values, and the synergistic effect of the heterostructures.https://www.mdpi.com/2073-4352/12/12/1727kineticsheterostructureelectrolytespectroscopy analysisnyquist plot |
| spellingShingle | I. Neelakanta Reddy Bhargav Akkinepally Cheolho Bai Jaesool Shim Effect of Electrolytes on the BiOI/SnO<sub>2</sub> Heterostructure to Achieve Stable Photo-Induced Carrier Generation Crystals kinetics heterostructure electrolyte spectroscopy analysis nyquist plot |
| title | Effect of Electrolytes on the BiOI/SnO<sub>2</sub> Heterostructure to Achieve Stable Photo-Induced Carrier Generation |
| title_full | Effect of Electrolytes on the BiOI/SnO<sub>2</sub> Heterostructure to Achieve Stable Photo-Induced Carrier Generation |
| title_fullStr | Effect of Electrolytes on the BiOI/SnO<sub>2</sub> Heterostructure to Achieve Stable Photo-Induced Carrier Generation |
| title_full_unstemmed | Effect of Electrolytes on the BiOI/SnO<sub>2</sub> Heterostructure to Achieve Stable Photo-Induced Carrier Generation |
| title_short | Effect of Electrolytes on the BiOI/SnO<sub>2</sub> Heterostructure to Achieve Stable Photo-Induced Carrier Generation |
| title_sort | effect of electrolytes on the bioi sno sub 2 sub heterostructure to achieve stable photo induced carrier generation |
| topic | kinetics heterostructure electrolyte spectroscopy analysis nyquist plot |
| url | https://www.mdpi.com/2073-4352/12/12/1727 |
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