Molecularly engineered aspartic acid-intercalated graphene oxide-based membranes for ultrafast removal of dyes and heavy metal salts.
8 affiliations
- 1School of Material Science & Engineering, Beijing University of Chemical Technology Beijing 100029 China.
- 2Széchenyi István University Egyetem Tér 1 9026 Győr Hungary.
- 3Department of Metallurgy and Materials Engineering, Dawood University of Engineering and Technology Karachi 74800 Pakistan.
- 4Department of Chemistry, Shaheed Benazir Bhutto University Shaheed Benazirabad (67480) Pakistan.
- 5Department of Chemistry, Mirpur University of Science and Technology Mirpur Azad Jammu and Kashmir Pakistan [email protected].
- 6MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology Harbin 150001 PR China.
- 7Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University Riyadh 11451 Saudi Arabia.
- 8Department of Pharmaceutics, College of Pharmacy, King Saud University Riyadh 11451 Saudi Arabia.
Abstract
Graphene oxide-based composite membranes with controlled nanochannels are effective for the separation of dyes, biomolecules, salts, and heavy metal ions. In this work, aspartic acid@graphene oxide (AA@GO) membranes were prepared by surface functionalization of GO nanosheets with aspartic acid. The [email protected]% membrane, with a thickness of 320 ± 10 nm, showed excellent rejection of 99.9%, 98.5%, and 99.8% for Rhodamine B, Evan blue, and methylene blue dyes, along with water permeances of 730 ± 10, 815 ± 10, and 800 ± 10 L m⁻² h⁻¹ bar⁻¹, respectively. This membrane also demonstrated >98% rejection efficiency for heavy metal salts, i.e., Pb²⁺, Cd²⁺, and As³⁺ ions. It is more interesting that the ultrathin AA@GO membrane (300 nm) demonstrated an exceptionally high water permeance of 1400 ± 10 L m⁻² h⁻¹ bar⁻¹. Moreover, aspartic acid intercalation provides an excellent aqueous stability to the AA@GO membrane up to 55 days. These results suggest that AA@GO membrane can be future candidates for advanced water purification system and waste-water treatment applications due to its excellent rejection, high permeability, and enhanced aqueous stability.
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BibTeX
@article{hussain2026molecularly,
title = {{Molecularly engineered aspartic acid-intercalated graphene oxide-based membranes for ultrafast removal of dyes and heavy metal salts.}},
author = {Gada Hussain and Sajid Hussain Siyal and Ashique Hussain Jatoi and Khalid Hussain Thebo and Akbar Ali and Ahmed Nadeem and Gamal A Shazly},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra08036g},
url = {https://europepmc.org/article/MED/42903579},
note = {CC BY},
}
RIS
TY - JOUR
TI - Molecularly engineered aspartic acid-intercalated graphene oxide-based membranes for ultrafast removal of dyes and heavy metal salts.
AU - Gada Hussain
AU - Sajid Hussain Siyal
AU - Ashique Hussain Jatoi
AU - Khalid Hussain Thebo
AU - Akbar Ali
AU - Ahmed Nadeem
AU - Gamal A Shazly
PY - 2026
DA - 2026/10/20
JO - RSC advances
DO - 10.1039/d6ra08036g
UR - https://europepmc.org/article/MED/42903579
AB - Graphene oxide-based composite membranes with controlled nanochannels are effective for the separation of dyes, biomolecules, salts, and heavy metal ions. In this work, aspartic acid@graphene oxide (AA@GO) membranes were prepared by surface functionalization of GO nanosheets with aspartic acid. The [email protected]% membrane, with a thickness of 320 ± 10 nm, showed excellent rejection of 99.9%, 98.5%, and 99.8% for Rhodamine B, Evan blue, and methylene blue dyes, along with water permeances of 730 ± 10, 815 ± 10, and 800 ± 10 L m⁻² h⁻¹ bar⁻¹, respectively. This membrane also demonstrated >98% rejection efficiency for heavy metal salts, i.e., Pb²⁺, Cd²⁺, and As³⁺ ions. It is more interesting that the ultrathin AA@GO membrane (300 nm) demonstrated an exceptionally high water permeance of 1400 ± 10 L m⁻² h⁻¹ bar⁻¹. Moreover, aspartic acid intercalation provides an excellent aqueous stability to the AA@GO membrane up to 55 days. These results suggest that AA@GO membrane can be future candidates for advanced water purification system and waste-water treatment applications due to its excellent rejection, high permeability, and enhanced aqueous stability.
SN - 2046-2069
ER -