Novel CaCO3/g-C3N4 composites with enhanced charge separation and photocatalytic activity |
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| Authors: | Peng Lu Xueli Hu Yujie Li Yazhou Peng Meng Zhang Xue Jiang Youzhou He Min Fu Fan Dong Zhi Zhang |
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| Institution: | 1. College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China;2. College of Environment and Resources, Chongqing Technology and Business University, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing 400067, China |
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| Abstract: | A novel CaCO3/graphitic carbon nitride (g-C3N4) photocatalyst was synthesized for the first time via a facile calcination method using CaCO3 and melamine as precursors. The as-prepared samples were characterized using various techniques, such as scanning and transmission electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller analysis, as well as Fourier-transform infrared, X-ray photoelectron, photoluminescence, and UV–vis diffuse reflectance spectroscopy. The results of the experiments confirm the successful coupling of CaCO3 to g-C3N4. The photocatalytic activity of the synthesized CaCO3/g-C3N4 composites was evaluated by assessing their performance in the photocatalytic degradation of crystal violet (CV) in water under visible light irradiation. The analysis shows that CaCO3/g-C3N4 exhibits higher photocatalytic activity towards CV degradation (76.0%) than pristine g-C3N4 (21.6%) and CaCO3 (23.2%). Radical trapping and electron spin resonance experiments show that hydroxyl radicals ( | |
| Keywords: | Corresponding authors Calcination Photocatalysis Charge separation |
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