Facile Fabrication of Wood-Derived Porous Fe 3 C/Nitrogen-Doped Carbon Membrane for Colorimetric Sensing of Ascorbic Acid

• Published in: Nanomaterials (Basel, Switzerland) Switzerland), 2023, Vol.13 (20)
• Main Authors: Saeedi Garakani, Sadaf, Zhang, Miao, Xie, Dongjiu, Sikdar, Anirban, Pang, Kanglei, Yuan, Jiayin
• Format: Article
• Language: English
• Subjects: ascorbic acid; colorimetric detection; iron carbide nanoparticles; nitrogen-doped carbon; wood-derived carbon
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano13202786

Fe 3 C nanoparticles hold promise as catalysts and nanozymes, but their low activity and complex preparation have hindered their use. Herein, this study presents a synthetic alternative toward efficient, durable, and recyclable, Fe 3 C-nanoparticle-encapsulated nitrogen-doped hierarchically porous carbon membranes (Fe 3 C/N–C). By employing a simple one-step synthetic method, we utilized wood as a renewable and environmentally friendly carbon precursor, coupled with poly(ionic liquids) as a nitrogen and iron source. This innovative strategy offers sustainable, high-performance catalysts with improved stability and reusability. The Fe 3 C/N–C exhibits an outstanding peroxidase-like catalytic activity toward the oxidation of 3,3′,5,5′-tetramethylbenzidine in the presence of hydrogen peroxide, which stems from well-dispersed, small Fe 3 C nanoparticles jointly with the structurally unique micro-/macroporous N–C membrane. Owing to the remarkable catalytic activity for mimicking peroxidase, an efficient and sensitive colorimetric method for detecting ascorbic acid over a broad concentration range with a low limit of detection (~2.64 µM), as well as superior selectivity, and anti-interference capability has been developed. This study offers a widely adaptable and sustainable way to synthesize an Fe 3 C/N–C membrane as an easy-to-handle, convenient, and recoverable biomimetic enzyme with excellent catalytic performance, providing a convenient and sensitive colorimetric technique for potential applications in medicine, biosensing, and environmental fields.