Pyrrolic-nitrogen-rich biomass-derived catalyst for sustainable degradation of organic pollutant via a self-powered electro-Fenton process
Pyrrolic-nitrogen-rich biomass-derived catalyst for sustainable degradation of organic pollutant via a self-powered electro-Fenton process
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富含吡咯氮的生物质衍生催化剂，通过自供电电芬顿过程可持续降解有机污染物
DOI：
10.1016/j.nanoen.2019.103940
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发表时间：
2019-10-01
期刊：
影响因子：
17.6
通讯作者：
Gao, Shuyan
中科院分区：
文献类型：
--
作者：
Tian, Miao;Zhu, Yingzheng;Gao, Shuyan
尽管电fenton （electro-Fenton， EF）系统的研究已经进行了多年，但缺乏经济高效、高选择性的生产H2O2电催化剂和可持续供电的自供电技术仍然是EF技术大规模实际应用的挑战。为此，我们探索了一种KHCO3-MgO双孔隙策略，以定制生物质源性参杂氮碳催化剂的热解氮含量，以实现高2e（-）氧还原电催化活性，并开发了一种多接触层双向摩擦纳米发电机（MCLA-TENG）作为电源，其开路电压为1450 V，输出电流为1.27 mA，转移电荷为1.76 mu C，最佳输出功率密度为7.4 W m（-2）。通过循环伏安、线性扫描伏安、紫外-可见吸收和H2O2浓度试验验证了其对抗性溴甲酚绿的自功率EF降解作用。本研究不仅通过调节热解氮含量实现了阴极催化材料的可控合成，实现了有效的H2O2生成，同时也推动了阴极催化系统的发展方向，即开发出更多与双孔形成机制相似或相同的可替代多孔材料，或扩展更常见的生物废弃物衍生碳材料，使其能够在不使用传统电源的情况下，利用TENG自供电，可持续地降解有机污染物。
Despite the intense electro-Fenton (EF) system research for many years, the lack of cost-effective and highly selective electrocatalysts for H2O2 production and self-powered technology for sustainable electric supply remains the challenge in wide-scale practical application of EF technology. Herein, we explore a KHCO3-MgO dual-porogen strategy to tailor the content of pyrrolic nitrogen of biomass-derived nitrogen-doped carbon catalyst from sophora flowers to achieve the high 2e(-) oxygen reduction electrocatalytic activity and develop a multi-contact layer asway triboelectric nanogenerator (MCLA-TENG) as an electric supply with open-circuit voltage of 1450 V, output current of 1.27 mA, transferred charge of 1.76 mu C, and the optimum output power density of 7.4 W m(-2), to self-power EF degradation of resistant bromocresol green, which is confirmed by cyclic voltammogram, linear sweep voltammogram, UV-vis absorption and H2O2 concentration test. This work not only achieves the controllable synthesis of cathode catalytic materials via tuning pyrrolic nitrogen content for effective H2O2 production, but also advances the EF system with a direction to develop more alternative porogens with the similar/same pore-forming mechanism to/as the dual porogens or extend more common biowaste-derived carbon materials for the sustainable EF degradation of organic pollutant self-powered by TENG without the traditional power sources.