Metal-Free Nitrogen-Doped Porous Carbon Nanofiber Catalyst for Solar-Fenton-Like System: Efficient, Reusable and Active Catalyst Over a Wide Range of Ph

催化作用 材料科学 碳纳米纤维 多孔性 金属 化学工程 碳纤维 无机化学 化学 有机化学 复合材料 复合数 冶金 工程类
作者
Ahmed A. Taha,Libing Huang,Hongyang Ma,Seeram Ramakrishna,Yong Liu
出处
期刊:Social Science Research Network [Social Science Electronic Publishing]
标识
DOI:10.2139/ssrn.4227796
摘要

Water pollution is a growing environmental crisis caused by industrialization. In-situ production of reactive oxygen species (ROS) is one of the most promising strategies to challenge this problem. However, developing a robust and efficient catalyst that can operate in harsh conditions without generating secondary pollution and tackle the recycling difficulties of powder catalysts remains a challenge. In this study, graphitized N-doped carbon nanofiber (CNF) catalyst was synthesized in a direct synthesis approach, which is more efficient in time and cost and suitable for industrial applications, by means of electrospinning and carbonization process. Zinc acetate and iron nitrate functioned as a template for porous structure generation and carbon graphitizing catalysts. The as-synthesized catalyst was used in the solar-Fenton system for RhB degradation and showed comparable performances in a wide pH range. This was mainly due to: i) the high surface area (~652 m2 g-1) and the micro-mesoporous structure, which have reduced the inner diffusion resistance and facilitated mass transport radically during the reaction. ii) The enhanced electron transfer kinetics through the long 1D CNF revealed by the cyclic voltammetry analysis. iii) The abundance of oxygen-containing function groups, pyridinic-N and graphitic-N active sites that efficiently activated the H2O2 and generated the ROS responsible for the degradation of the organic pollutants. The catalysts’ 1D structure and its lightweight enabled the catalyst recovery and reuse.
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