| Full text | |
| Author(s): |
Total Authors: 2
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| Affiliation: | [1] Univ Campinas UNICAMP, Chem Inst, Lab Nanotecnol & Energia Solar, POB 6154, BR-13083970 Campinas - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 47, n. 8, p. 5211-5219, JAN 26 2022. |
| Web of Science Citations: | 0 |
| Abstract | |
Recently, bismuth vanadate (BiVO4) has attracted substantial attention for photocatalytic applications owing to its many advantages as semiconductor to drive water oxidation. Despite possessing promising characteristics to be applied in photocatalysis, the fast electron-hole pairs recombination is still one of the drawbacks involving this semiconductor. The use of conformal layers to minimize such limitation and to improve charge separation is the aim of this work. Herein, we report on the use of SnO2 as a conformal coating layer over the BiVO4 surface for O2 evolution reaction. The incorporation of SnO2 over the BiVO4 surface showed the beneficial effect in O2 evolution compared to the pristine material, resulting in 490 mmol after 6 h of irradiation. Transient absorption and surface photovoltage spectroscopies indicate enhanced charge carrier separation and transport by passivating BiVO4 with SnO2 thin layer. Even though the O2 evolution tests in this work were carried out without the presence of a co-catalyst, the use of a thin conformal coating of SnO2 over BiVO4 showed promising results for further studies. (AU) | |
| FAPESP's process: | 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country |
| Grantee: | Ana Flávia Nogueira |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 16/23178-8 - Elucidating the photoinduced charge carriers mobility in photocatalysts passivated with thin conformal coatings to improve the water splitting efficiency |
| Grantee: | Saulo do Amaral Carminati |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |
| FAPESP's process: | 15/23775-3 - Metal oxides nanocomposites with reduced graphene oxide for water splitting reactions and photocatalytic reduction of CO2 |
| Grantee: | Saulo do Amaral Carminati |
| Support Opportunities: | Scholarships in Brazil - Doctorate |