In situ growing Cu2(OH)2CO3 on oxidized carbon nitride with enhanced photocatalytic hydrogen evolution and pollutant degradation
| Autor: | Guangren Qian, Yingying Zhang, Yao Xu, Weide Wang, Dan Chen, Xiaoqiao Zhang, Xiaonan Wang |
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| Rok vydání: | 2020 |
| Předmět: |
In situ
Materials science Renewable Energy Sustainability and the Environment Coprecipitation Composite number Energy Engineering and Power Technology Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Fuel Technology chemistry Photocatalysis Degradation (geology) Malachite green 0210 nano-technology Carbon nitride |
| Zdroj: | International Journal of Hydrogen Energy. 45:24697-24709 |
| ISSN: | 0360-3199 |
| Popis: | A novel composite has been successfully synthesized in situ via a coprecipitation method about the coupling of Cu2(OH)2CO3 with oxidized carbon nitride (O-g-C3N4) forming Cu2(OH)2CO3/O-g-C3N4 (CuCN) heterojunction structure. The as-prepared composites were characterized by diverse means. The CuCN composite with 3:5 mass ratio of Cu2(OH)2CO3 to O-g-C3N4 (60CuCN) presented an extremely excellent photocatalytic activity. The photocatalytic H2 evolution of 60CuCN was around 23.26 and 44.62 times higher than that of g-C3N4 and Cu2(OH)2CO3, respectively. The photocatalytic degradation malachite green (MG) rate of 60CuCN was up to 91%, which was around 2.2 and 4.8 times as much as that of g-C3N4 and Cu2(OH)2CO3, respectively. These results are mainly attributed to the structure property of O-g-C3N4 and the heterojunction structure of the composite, which could effectively accelerate the separation and transfer rate of photogenerated electrons and holes. The holes (h+) and superoxide radicals (·O2−) played a dominant role in photocatalytic degradation MG reaction. |
| Databáze: | OpenAIRE |
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