石墨碳化物和TiO2的复合物作为微生物燃料电池中的光电催化剂
Shreeniwas Madhav Sathe1, Manikanta Manmadha Doki1, Subrata Mandal2
1Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
概括
一种新的石墨碳化物 (GCN) 和TiO2复合物有效地去除污染物,如二硫酸 (SDS) 和化学氧需求 (COD),同时在微生物燃料电池 (MFC) 中产生生物电力. 这种混合系统提供了高效的废水处理和能源发电.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 表面活性剂排放到水体中是一个重要的环境问题,特别是在发展中国家.
- 开发有效的方法来同时处理废水和回收能源至关重要.
研究的目的:
- 开发和评估基于微生物燃料电池 (MFC) 的混合系统,使用石墨碳化物 (GCN) 和TiO2复合物作为光电催化剂.
- 评估系统在同时生产生物电力和去除有机物质 (化学氧需求,COD) 和二甲硫酸盐 (SDS) 的有效性.
主要方法:
- 制造一种GCN:TiO2复合光电催化剂,其最佳比率为70:30 (重量). 百分之一). %).
- 复合材料的光化学性质的表征,包括带间隙和电荷重组.
- 将复合材料集成到基于MFC的混合系统中,用于污染物降解和发电.
- 使用木炭生物过器和光阴室实施后续治疗.
主要成果:
- 与独立的TiO2相比,GCN:TiO2复合物表现出增强的电化学反应和减少的带隙/电荷重组.
- 由GCN:TiO2催化的MFC系统实现了显著的COD (58.2 ± 9.6%) 和SDS (86.5 ± 7.1%) 消除,最大功率密度为1.07W m−3.3.
- 混合系统,包括后续处理,进一步提高了整体COD和SDS去除效率,分别为92.1 ± 2.7%和95.6 ± 1.5%.
- 电催化性能归因于GCN-TiO2复合物的活性物种.
结论:
- 开发的基于MFC的混合系统显示了市政废水同时进行二级和三级处理的巨大潜力.
- GCN:TiO2复合物有效地作为光催化剂和电催化剂发挥作用,为废水整治和能源采集提供了一种创新的方法.
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