Eco-friendly synthesis of carbon nanomaterials from pumpkin waste
Allende, Scarlett, Liu, Yang, Zafar, Muhammad Adeel, and Jacob, Mohan V. (2025) Eco-friendly synthesis of carbon nanomaterials from pumpkin waste. Journal of Porous Materials, 32. pp. 2443-2453.
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Abstract
Waste management remains a major environmental challenge in the food sector, making the recovery and reuse of organic waste essential. This study presents a novel and optimised approach to converting pumpkin peel waste into high-quality carbon material using microwave-assisted pyrolysis (MAP), without the use of chemical additives or metal doping. The resulting carbon nanomaterial exhibits desirable characteristics, including crystalline to semicrystalline carbon nanoparticles (lattice spacing of 2.29 Å), microporosity of 29.1 m²/g, and a pore diameter of 3.7 nm, along with enhanced electron transfer kinetics (Rct = 563 Ω). This carbon material was employed to modify a screen-printed carbon electrode (SPCE) for the electrochemical detection of nitrite. The modified electrode shows a significant improvement in electrochemical response, with an increase in current output from 20 µA to 30 µA, resulting in higher conductivity, a broader Linear detection range, and a lower detection Limit of 10 µM. This work demonstrates a promising result for upcycling food waste into functional nanomaterials, offering both environmental benefits and practical applications in electrochemical sensing technologies.
| Item ID: | 89238 |
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| Item Type: | Article (Research - C1) |
| ISSN: | 1573-4854 |
| Keywords: | Biochar, Microwave-assisted pyrolysis, Nitrite, Screen-printed carbon electrode |
| Copyright Information: | © The Author(s) 2025. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
| Date Deposited: | 16 Jul 2026 08:01 |
| FoR Codes: | 40 ENGINEERING > 4018 Nanotechnology > 401807 Nanomaterials @ 100% |
| SEO Codes: | 24 MANUFACTURING > 2414 Processed non-food agriculture products (excl. wood, paper and fibre) > 241499 Processed non-food agricultural products (excl. wood, paper and fibre) not elsewhere classified @ 100% |
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