The role of xerogel in immobilising carbon quantum dots derived from oil palm mesocarp fibre: a potential adsorbent for CO2 capture / Aimi Solihah Zaul Kapri and Norhusna Mohamad Nor

Zaul Kapri, Aimi Solihah and Mohamad Nor, Norhusna (2025) The role of xerogel in immobilising carbon quantum dots derived from oil palm mesocarp fibre: a potential adsorbent for CO2 capture / Aimi Solihah Zaul Kapri and Norhusna Mohamad Nor. ESTEEM Academic Journal, 21. pp. 41-58. ISSN 2289-4934

Abstract

Carbon quantum dots (CQDs) often suffer from agglomeration and structural instability, significantly reducing their adsorption efficiency and reusability. This study investigates the role of xerogel in stabilising and immobilising CQDs derived from oil palm mesocarp fibre (MF) as a potential CO2 absorbent. The extracted MF cellulose was synthesised into CQDs via hydrothermal treatment and subsequently immobilised within a xerogel matrix (X-MF-CQDs). The CO2 adsorption performance was evaluated through breakthrough and sorption capacity experiments, where X-MF-CQDs at a 1:50 dilution exhibited the highest sorption capacity (129.04 mg/g) and a moderate breakthrough time (61.3 s). BET analysis confirmed a low surface area (1.7011 m2/g), while pore size distribution revealed dominant micro porosity ( ̴ 20 A), crucial for CO2 capture. FTIR analysis indicated the presence of N-H, C=N, C-O, and C-S bonds, confirming successful heteroatom doping. CHNS analysis revealed a composition of 50.33 % C, 22.78 % O, and 0.6 % S, highlighting the contribution of heteroatoms in CO2 affinity. HRTEM and FESEM analyses confirmed uniform CQDs dispersion within the xerogel matric, effectively minimising agglomeration and enhancing adsorption. These findings demonstrate the effectiveness of xerogel-immobilised CQDs (X-MF-CQDs) as a stable and efficient CO2 adsorbent, promoting sustainable waste valorisation strategies.

Metadata

Item Type: Article
Creators:
Creators
Email / ID Num.
Zaul Kapri, Aimi Solihah
UNSPECIFIED
Mohamad Nor, Norhusna
norhusna8711@uitm.edu.my
Contributors:
Contribution
Name
Email / ID Num.
Chief Editor
Damanhuri, Nor Salwa
UNSPECIFIED
Subjects: T Technology > TP Chemical technology > Adsorption
Divisions: Universiti Teknologi MARA, Pulau Pinang > Permatang Pauh Campus
Journal or Publication Title: ESTEEM Academic Journal
UiTM Journal Collections: Listed > ESTEEM Academic Journal (EAJ)
ISSN: 2289-4934
Volume: 21
Page Range: pp. 41-58
Keywords: Adsorption, Carbon quantum dots (CQDs), CO2 removal, Mesocarp fibre, oil palm waste, Xerogel
Date: March 2025
URI: https://ir.uitm.edu.my/id/eprint/112511
Edit Item
Edit Item

Download

[thumbnail of 112511.pdf] Text
112511.pdf

Download (2MB)

ID Number

112511

Indexing

Statistic

Statistic details