CuWO4 decorated by polypyrrole (PPy) protector/sensitizer for novel photocatalytic and stable water splitting for hydrogen generation
| Autor: | Nguyen Thi Dieu Cam, Nguyen Minh Tri, Ngo Hong Anh Thu, Nguyen Thi Hanh, Pham Hai Dinh, Doan Van Thuan, Thanh-Dong Pham, D.Q. Trung, Hoang Thu Trang, Hoang Van Ha |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Conductive polymer Materials science Hydrogen Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Polypyrrole 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Fuel Technology chemistry Chemical engineering Photocatalysis Water splitting 0210 nano-technology Photocatalytic water splitting Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 45:21442-21449 |
| ISSN: | 0360-3199 |
| Popis: | Herein, we used polypyrrole (PPy), a conducting polymer, to decorate on CuWO4 to boost its photocatalytic activity. Then, the synthesized PPy decorated on CuWO4 (PPy/CuWO4) materials were applied to photocatalytically split water to produce hydrogen. The study investigated that the used PPy effectively served as a spring-board (sensitizer) to improve charge (e− and h+) separation of the CuWO4 photocatalyst. The used PPy also effectively increased Fermi level of these separated e− of the CuWO4. Thus, the PPy/CuWO4 generated large available and strong charges, which effectively split water to generate hydrogen. The optimal PPy decorating content for the highest water splitting efficiency is shown to be 4 wt%. Above the optimal decorating content, these excess PPy covered more CuWO4 surface preventing incident irradiation reaching to the material leading to decrease in photocatalytic efficiency. The H2 generation from photocatalytic water splitting by the 4PPy/CuWO4 were 365 (μmol. g−1cat. h−1). It is further observed that the used PPy, which completely covered the CuWO4 particles, effectively assisted charge transfer for their rapid travel to the polymer surface. Thus, the used PPy successfully prevented contact between charges and CuWO4 to protect the material from self-photocorrosion through water splitting process. |
| Databáze: | OpenAIRE |
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