Hydrochars (HCs) are carbonaceous nanomaterials derived from many renewable sources, including biomass and various natural products such as plant matter, agricultural waste, and other organic derivatives. This study introduces a straightforward, sustainable, and cost-efficient hydrothermal method to synthesize HCs, utilizing an aqueous extract of Lavandula multifida’s aerial parts harvested from the Kerkennah islands, Tunisia. The HCs synthesis was performed in water at three different temperatures (180 ℃, 240 ℃, and 300 ℃) for 1 h. Comprehensive morphological and microstructural analyses of the obtained solid fractions were conducted using XRD, TEM and UV–Vis spectroscopy and PL techniques. The PL emission spectra of the different synthesized HCs were recorded at varying excitation wavelengths. Out of the three materials produced, Lm180 hydrochar stood out as the optimal choice for detecting metal ions. The remarkably low limit of detection (LOD) of 0.78 nM achieved by Lm180 hydrochars demonstrates their performances for the detection of mercury ions at trace levels.
Fluorescent Properties and Detection of Heavy Metals of Hydrochar Samples Obtained by Hydrothermal Carbonization of Lavandula Multifida Plant: A Preliminary Study
A. Ferlazzo;
2025-01-01
Abstract
Hydrochars (HCs) are carbonaceous nanomaterials derived from many renewable sources, including biomass and various natural products such as plant matter, agricultural waste, and other organic derivatives. This study introduces a straightforward, sustainable, and cost-efficient hydrothermal method to synthesize HCs, utilizing an aqueous extract of Lavandula multifida’s aerial parts harvested from the Kerkennah islands, Tunisia. The HCs synthesis was performed in water at three different temperatures (180 ℃, 240 ℃, and 300 ℃) for 1 h. Comprehensive morphological and microstructural analyses of the obtained solid fractions were conducted using XRD, TEM and UV–Vis spectroscopy and PL techniques. The PL emission spectra of the different synthesized HCs were recorded at varying excitation wavelengths. Out of the three materials produced, Lm180 hydrochar stood out as the optimal choice for detecting metal ions. The remarkably low limit of detection (LOD) of 0.78 nM achieved by Lm180 hydrochars demonstrates their performances for the detection of mercury ions at trace levels.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
