Silica–Lignin Composites—Insight into Physicochemical Properties and Adsorption Mechanisms
- 1Department of Physical Chemistry, Institute of Chemical Sciences, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Square 3, 20-031 Lublin, Poland
Abstract
Two silica–lignin composites with varying biopolymer content were synthesized using the sol–gel method as effective adsorbents for the removal of organic dyes from aqueous solutions. The textural, structural, and surface properties of the synthesized materials were determined using nitrogen adsorption–desorption techniques, XRD, XPS, and FTIR. XPS and XRD analysis confirmed the effective modification of the silica surface with lignin. Increasing the lignin content in the composite altered its physicochemical properties. Textural analysis revealed a decrease in the porosity of the composites with increasing the amount of biopolymer incorporated into the silica. Thermal analysis with the identification of gaseous thermal destruction products allowed for the determination of the thermal stability of the composites. Dye adsorption experiments, including equilibrium and kinetic measurements, allowed the determination of adsorption capacity, adsorption rate and adsorption mechanisms. FTIR mapping enabled the identification of differences in the interactions of selected dyes with the synthesized composites and revealed preferential adsorption on surface areas of the adsorbents rich in lignin or silica. The obtained results confirmed the potential of silica–lignin materials in environmental applications as cheap and biodegradable adsorbents.
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BibTeX
@article{blachnio2026silicalignin,
title = {{Silica–Lignin Composites—Insight into Physicochemical Properties and Adsorption Mechanisms}},
author = {Magdalena Blachnio and Malgorzata Zienkiewicz-Strzalka and Zofia Juchniewicz and Dariusz Sternik and Anna Derylo-Marczewska},
journal = {International Journal of Molecular Sciences},
year = {2026},
month = nov,
doi = {10.3390/ijms27219954},
url = {https://www.mdpi.com/1422-0067/27/21/9954},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Silica–Lignin Composites—Insight into Physicochemical Properties and Adsorption Mechanisms
AU - Magdalena Blachnio
AU - Malgorzata Zienkiewicz-Strzalka
AU - Zofia Juchniewicz
AU - Dariusz Sternik
AU - Anna Derylo-Marczewska
PY - 2026
DA - 2026/11/06
JO - International Journal of Molecular Sciences
DO - 10.3390/ijms27219954
UR - https://www.mdpi.com/1422-0067/27/21/9954
AB - Two silica–lignin composites with varying biopolymer content were synthesized using the sol–gel method as effective adsorbents for the removal of organic dyes from aqueous solutions. The textural, structural, and surface properties of the synthesized materials were determined using nitrogen adsorption–desorption techniques, XRD, XPS, and FTIR. XPS and XRD analysis confirmed the effective modification of the silica surface with lignin. Increasing the lignin content in the composite altered its physicochemical properties. Textural analysis revealed a decrease in the porosity of the composites with increasing the amount of biopolymer incorporated into the silica. Thermal analysis with the identification of gaseous thermal destruction products allowed for the determination of the thermal stability of the composites. Dye adsorption experiments, including equilibrium and kinetic measurements, allowed the determination of adsorption capacity, adsorption rate and adsorption mechanisms. FTIR mapping enabled the identification of differences in the interactions of selected dyes with the synthesized composites and revealed preferential adsorption on surface areas of the adsorbents rich in lignin or silica. The obtained results confirmed the potential of silica–lignin materials in environmental applications as cheap and biodegradable adsorbents.
SN - 1422-0067
ER -