张茗迪,贾玉红,尤宏,付亮,李维国.g-C3N4/Cu2O/CF电极制备及在微生物燃料电池中的应用[J].环境科学学报,2019,39(9):2945-2952
g-C3N4/Cu2O/CF电极制备及在微生物燃料电池中的应用
- Preparation of g-C3N4/Cu2O/CF electrode and its application in microbial fuel cells
- 基金项目：城市水资源与水环境国家重点实验室课题（No.2019DX08）
- 张茗迪
- 1. 哈尔滨工业大学城市水资源与水环境国家重点实验室, 哈尔滨 150000;2. 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264200
- 贾玉红
- 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264200
- 尤宏
- 1. 哈尔滨工业大学城市水资源与水环境国家重点实验室, 哈尔滨 150000;2. 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264200
- 付亮
- 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264200
- 李维国
- 哈尔滨工业大学(威海)海洋科学与技术学院, 威海 264200
- 摘要：为了提高微生物燃料电池的产电性能，采用电沉积法将石墨态氮化碳（g-C3N4）与氧化亚铜（Cu2O）负载到碳毡（Carbon felt，CF）表面，制得g-C3N4/Cu2O/CF光电极用于构建微生物燃料电池.通过场发射扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）、光生电流曲线（I-T）、线性扫描伏安曲线（LSV）对光电阴极进行光电性能测试，并在白光发光二极管（LED）辐照下研究了以Cu2O/CF、g-C3N4/Cu2O/CF为阴极光催化微生物燃料电池的产电性能.结果表明，g-C3N4/Cu2O/CF电极中g-C3N4分布在Cu2O之间；g-C3N4/Cu2O/CF光电极能提高光利用率，与Cu2O/CF光电极相比，光电流密度达到2700 mA·m-2，增长幅度达到125%；与Cu2O/CF阴极微生物燃料电池相比，g-C3N4/Cu2O/CF阴极微生物燃料电池具有更优的产电能力，在白光LED辐照下最大功率密度和光电流密度达到110.7 mW·m-2和1102 mA·m-2，增长幅度达到16%和27%.
- Abstract：To improve the electricity generation capabilities of microbial fuel cells (MFC), graphite carbonitride (g-C3N4) and cuprous oxide (Cu2O) were electrodeposited onto the surface of carbon felt (CF) to fabricate a g-C3N4/Cu2O/CF photocathode. The photoelectric performance of the photocathode was tested by using field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), photogenerated current curve (IT), and linear sweep voltammetry (LSV). The results indicate that g-C3N4 is distributed between Cu2O in g-C3N4/Cu2O/CF electrode; the photogenerated current density of g-C3N4/Cu2O/CF cathode was 2700 mA·m-2, which was 125% higher than that of Cu2O/CF cathode. g-C3N4/Cu2O/CF photocathode was used to construct a microbial fuel cell. The energy density of the photocatalytic microbial fuel cells (PMFC) with Cu2O/CF and g-C3N4/Cu2O/CF cathodes were tested under the irradiation of white LED. Compared with the PMFC with Cu2O/CF cathode, the PMFC with g-C3N4/Cu2O/CF cathode has better power generating performance. When the g-C3N4/Cu2O/CF cathode was used in MFC, maximum power density and photocurrent density of MFC under white LEDs irradiation were up to 110.7 mW·m-2 and 1102 mA·m-2, 16% and 27% higher than the PMFC with Cu2O/CF cathode.
