Temperature effect on green-synthesized Co3O4 nanoparticle as photocatalyst for overall water splitting
| Autor: | Sajjad U. Haq, Yun-Hai Wang, Qing-Yun Chen, Zhong-Hang Xing |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences law.invention chemistry Chemical engineering law Photocatalysis Water splitting Atomic ratio Calcination 0210 nano-technology Cobalt Cobalt oxide |
| Zdroj: | Journal of Photonics for Energy. 10 |
| ISSN: | 1947-7988 |
| DOI: | 10.1117/1.jpe.10.042006 |
| Popis: | Co3O4 nanoparticles were synthesized by a green synthesis method using bread fungus and cobalt nitrate hexahydrate as the precursors. The effects of the calcination temperature on the structure and properties of nanoparticles, and the ambient temperature on the photocatalytic reaction are discussed. The cubic structure of Co3O4 nanoparticles was obtained, and the grain size was between 14 and 19 nm at different calcination temperatures. Co3O4 calcined at 500°C shows good photocatalytic performance. Without adding any sacrificial agent and cocatalyst, the amount of hydrogen and oxygen released in 5 h were 259.4 and 135.7 μmolg − 1, respectively. The results show that, with the increase of ambient temperature, the evolution rate of hydrogen and oxygen is accelerated, and the atomic ratio of hydrogen to oxygen is close to 2:1. In addition, the Co3O4 photocatalyst has good stability. Our study provides an environmentally friendly, low-cost, and efficient method for the preparation of cobalt oxide photocatalysts with excellent performance. |
| Databáze: | OpenAIRE |
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