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One-Step to Prepare Lignin Based Fluorescent Nanoparticles with Excellent Radical Scavenging Activity

Xujing Zhang1, Hatem Abushammala2, Debora Puglia3, Binbao Lu1, Pengwu Xu1, Weijun Yang1,*, Piming Ma1
1 The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
2 Environmental Health and Safety Program, College of Health Sciences, Abu Dhabi University, P.O. Box 59911, Abu Dhabi, United Arab Emirates
3 Civil and Environmental Engineering Department, Materials Engineering Center, Perugia University, UdR INSTM, Terni, 05100, Italy
* Corresponding Author: Weijun Yang. Email: email
(This article belongs to the Special Issue: Functional Materials Based on Forest Residues)

Journal of Renewable Materials https://doi.org/10.32604/jrm.2024.049810

Received 18 January 2024; Accepted 06 March 2024; Published online 08 April 2024

Abstract

Fluorescent nanomaterials have attracted much attention, due to their unique luminescent properties and promising applications in biomedical areas. In this study, lignin based fluorescent nanoparticles (LFNP) with high yield (up to 32.4%) were prepared from lignin nanoparticles (LNP) by one-pot hydrothermal method with ethylenediamine (EDA) and citric acid. Morphology and chemical structure of LFNP were investigated by SEM, FT-IR, and zeta potential, and it was found that the structure of LFNP changed with the increase of citric acid addition. LFNP showed the highest fluorescence intensity under UV excitation at wavelengths of 375–385 nm, with emission wavelengths between 454–465 nm, and exhibited strong photoluminescence behavior. Meanwhile, with the increase of citric acid content, the energy gap (ΔE) gradually decreased from 3.87 to 3.14 eV, which corresponds to the gradual enhancement of fluorescence performance. LFNP also exhibited excellent antioxidant activity, with DPPH free radical scavenging rate increased from 80.8% for LNP up to 96.7% for LFNP, confirming the great potential of these materials for application in biomedicine and cosmetic health care.

Graphical Abstract

One-Step to Prepare Lignin Based Fluorescent Nanoparticles with Excellent Radical Scavenging Activity

Keywords

Lignin; fluorescent nanoparticles; bioactivity; photoluminescence mechanism

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