TY - JOUR
T1 - Controlling the emissive pathways of carbon nanoparticles by selective surface functionalization
AU - Al Farsi, Basim
AU - Sumesh Sofin, R. G.
AU - El-Shafey, El Said I.
AU - Issac, Abey
AU - Al Marzouqi, Faisal
AU - Al Mashaikhi, Said
AU - Zar Myint, M. T.
AU - Abou-Zied, Osama K.
N1 - Funding Information:
We gratefully acknowledge the financial support from Sultan Qaboos University within the framework of research Internal Grant [IG/SCI/PHYS/18/05] and His Majesty’s Trust Fund for Strategic Research (SR/SCI/CHEM/18/01). Further, we thank the central analytical and applied research unit at Sultan Qaboos University for the XRD measurements. Mr. Abdul Rahman Al Nabhani, Department of pathology, Sultan Qaboos University is acknowledged for the TEM measurements and Prof. Salim Al-Harthi for XPS measurements.
Funding Information:
We gratefully acknowledge the financial support from Sultan Qaboos University within the framework of research Internal Grant [IG/SCI/PHYS/18/05] and His Majesty's Trust Fund for Strategic Research (SR/SCI/CHEM/18/01). Further, we thank the central analytical and applied research unit at Sultan Qaboos University for the XRD measurements. Mr. Abdul Rahman Al Nabhani, Department of pathology, Sultan Qaboos University is acknowledged for the TEM measurements and Prof. Salim Al-Harthi for XPS measurements.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11/15
Y1 - 2021/11/15
N2 - Environmental friendly and biocompatible fluorescent carbon nanoparticles (CNPs) show great potential for various applications. The functional groups on the surface of the NPs dramatically influence the absorption and emission characteristics of the particles. However, a conclusive emission mechanism of CNPs and the exact role of functional groups are still lacking. Herein, a systematic investigation has been carried out by quantifying the oxygen-based function groups (–OH, –CHO, –COOH, –CO, –COO) present on the surface of activated carbon (AC) nanoparticles to identify their role in the emission characteristics. AC samples, prepared by the activation process of green waste of mandarin peels, were subjected to further treatments to achieve different levels of surface functionality with oxygen containing functional groups such as carbonyl, carboxyl, phenol and lactone. Various characterization techniques were employed to identify and quantify the functional groups. A detailed emission study revealed the role of specific functional groups in the emission process. Our results suggests that various emissive pathways in CNPs can be controlled by selective surface functionalization. This study shows significant results, which could shed more light on the emission mechanism of CNPs and the pivotal role of surface functional groups.
AB - Environmental friendly and biocompatible fluorescent carbon nanoparticles (CNPs) show great potential for various applications. The functional groups on the surface of the NPs dramatically influence the absorption and emission characteristics of the particles. However, a conclusive emission mechanism of CNPs and the exact role of functional groups are still lacking. Herein, a systematic investigation has been carried out by quantifying the oxygen-based function groups (–OH, –CHO, –COOH, –CO, –COO) present on the surface of activated carbon (AC) nanoparticles to identify their role in the emission characteristics. AC samples, prepared by the activation process of green waste of mandarin peels, were subjected to further treatments to achieve different levels of surface functionality with oxygen containing functional groups such as carbonyl, carboxyl, phenol and lactone. Various characterization techniques were employed to identify and quantify the functional groups. A detailed emission study revealed the role of specific functional groups in the emission process. Our results suggests that various emissive pathways in CNPs can be controlled by selective surface functionalization. This study shows significant results, which could shed more light on the emission mechanism of CNPs and the pivotal role of surface functional groups.
KW - Activated carbon
KW - Deconvoluted PL spectrum
KW - Fluorescent carbon nanoparticles
KW - Oxidized activated carbon
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U2 - 10.1016/j.apsusc.2021.150618
DO - 10.1016/j.apsusc.2021.150618
M3 - Article
AN - SCOPUS:85111211722
SN - 0169-4332
VL - 566
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 150618
ER -