How porosity affects the emission of fluorescent carbon dot-silica porous composites

Carlo Maria Carbonaro; Swapneel Vijay Thakkar; Róbert Ludmerczki; Chiara Olla; Andrea Pinna; Danilo Loche; Luca Malfatti; Flaminia Cesare Marincola; Maria Francesca Casula

doi:10.1016/j.micromeso.2020.110302

How porosity affects the emission of fluorescent carbon dot-silica porous composites

Carlo Maria Carbonaro, Swapneel Vijay Thakkar, Róbert Ludmerczki, Chiara Olla, Andrea Pinna, Danilo Loche, Luca Malfatti, Flaminia Cesare Marincola, Maria Francesca Casula

Biological, Environmental Sciences and Engineering

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Blue-emitting nitrogen-doped carbon dots (CDN) produced by a solvent-free method have been successfully incorporated into silica (SiO2) through a sol-gel procedure. By exploiting the co-gelation of the dispersed carbon dots and of the silica matrix, homogeneous distribution of the carbon dots was obtained throughout the matrix. The CDN-SiO2 composites in the form of xero-, cryo-, and aerogels featuring different porous textures were produced by exploiting different gel drying strategies. The most critical parameters and the material features associated to the different synthesis were investigated by transmission electron microscopy, thermal analysis, Mid-infrared spectroscopy, N2 physisorption isotherms and time-resolved spectrofluorimetry. The emissive properties of CDN-SiO2 composites in the form of aero-, cryo- and xerogel were studied. The spectral properties and the efficiency of the emission change in the CDN-SiO2 composites pointed at the effect of CD loading and porous texture of xerogels. Our investigation expands the exploitation of functional carbon dots through the production of fluorescent solid-state composites with tunable porosities.

Original language	English (US)
Pages (from-to)	110302
Journal	Microporous and Mesoporous Materials
Volume	305
DOIs	https://doi.org/10.1016/j.micromeso.2020.110302
State	Published - May 5 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The financial support of Università di Cagliari and Fondazione di Sardegna, project ADVANCING, CUP F74I19001030007 and project NG-Light, CUP F74I19000930007 and Italian Ministry of Education, University and Research (MIUR) project PRIN2017 “CANDL2” (Grant 2017W75RAE), are gratefully acknowledged. SVT thanks financial support under P.O.R. Sardegna F.S.E.-Operational Programme of the Autonomous Region of Sardinia, European Social Fund 2014-2020- Axis III Education and training, Thematic goal 10, Investment Priority 10ii- Specific goal 10.5.12. We acknowledge the CeSAR (Centro Servizi Ricerca d'Ateneo) core facility of the University of Cagliari and Dr. A. Ardu for assistance with the generation of TEM images on a Jeol JEM 1400 Plus microscope.

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@article{608eeffcaa3f47269541802e5cb398d5,

title = "How porosity affects the emission of fluorescent carbon dot-silica porous composites",

abstract = "Blue-emitting nitrogen-doped carbon dots (CDN) produced by a solvent-free method have been successfully incorporated into silica (SiO2) through a sol-gel procedure. By exploiting the co-gelation of the dispersed carbon dots and of the silica matrix, homogeneous distribution of the carbon dots was obtained throughout the matrix. The CDN-SiO2 composites in the form of xero-, cryo-, and aerogels featuring different porous textures were produced by exploiting different gel drying strategies. The most critical parameters and the material features associated to the different synthesis were investigated by transmission electron microscopy, thermal analysis, Mid-infrared spectroscopy, N2 physisorption isotherms and time-resolved spectrofluorimetry. The emissive properties of CDN-SiO2 composites in the form of aero-, cryo- and xerogel were studied. The spectral properties and the efficiency of the emission change in the CDN-SiO2 composites pointed at the effect of CD loading and porous texture of xerogels. Our investigation expands the exploitation of functional carbon dots through the production of fluorescent solid-state composites with tunable porosities.",

author = "Carbonaro, {Carlo Maria} and Thakkar, {Swapneel Vijay} and R{\'o}bert Ludmerczki and Chiara Olla and Andrea Pinna and Danilo Loche and Luca Malfatti and {Cesare Marincola}, Flaminia and Casula, {Maria Francesca}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The financial support of Universit{\`a} di Cagliari and Fondazione di Sardegna, project ADVANCING, CUP F74I19001030007 and project NG-Light, CUP F74I19000930007 and Italian Ministry of Education, University and Research (MIUR) project PRIN2017 “CANDL2” (Grant 2017W75RAE), are gratefully acknowledged. SVT thanks financial support under P.O.R. Sardegna F.S.E.-Operational Programme of the Autonomous Region of Sardinia, European Social Fund 2014-2020- Axis III Education and training, Thematic goal 10, Investment Priority 10ii- Specific goal 10.5.12. We acknowledge the CeSAR (Centro Servizi Ricerca d'Ateneo) core facility of the University of Cagliari and Dr. A. Ardu for assistance with the generation of TEM images on a Jeol JEM 1400 Plus microscope.",

year = "2020",

month = may,

day = "5",

doi = "10.1016/j.micromeso.2020.110302",

language = "English (US)",

volume = "305",

pages = "110302",

journal = "Microporous and Mesoporous Materials",

issn = "1387-1811",

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T1 - How porosity affects the emission of fluorescent carbon dot-silica porous composites

AU - Carbonaro, Carlo Maria

AU - Thakkar, Swapneel Vijay

AU - Ludmerczki, Róbert

AU - Olla, Chiara

AU - Pinna, Andrea

AU - Loche, Danilo

AU - Malfatti, Luca

AU - Cesare Marincola, Flaminia

AU - Casula, Maria Francesca

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The financial support of Università di Cagliari and Fondazione di Sardegna, project ADVANCING, CUP F74I19001030007 and project NG-Light, CUP F74I19000930007 and Italian Ministry of Education, University and Research (MIUR) project PRIN2017 “CANDL2” (Grant 2017W75RAE), are gratefully acknowledged. SVT thanks financial support under P.O.R. Sardegna F.S.E.-Operational Programme of the Autonomous Region of Sardinia, European Social Fund 2014-2020- Axis III Education and training, Thematic goal 10, Investment Priority 10ii- Specific goal 10.5.12. We acknowledge the CeSAR (Centro Servizi Ricerca d'Ateneo) core facility of the University of Cagliari and Dr. A. Ardu for assistance with the generation of TEM images on a Jeol JEM 1400 Plus microscope.

PY - 2020/5/5

Y1 - 2020/5/5

N2 - Blue-emitting nitrogen-doped carbon dots (CDN) produced by a solvent-free method have been successfully incorporated into silica (SiO2) through a sol-gel procedure. By exploiting the co-gelation of the dispersed carbon dots and of the silica matrix, homogeneous distribution of the carbon dots was obtained throughout the matrix. The CDN-SiO2 composites in the form of xero-, cryo-, and aerogels featuring different porous textures were produced by exploiting different gel drying strategies. The most critical parameters and the material features associated to the different synthesis were investigated by transmission electron microscopy, thermal analysis, Mid-infrared spectroscopy, N2 physisorption isotherms and time-resolved spectrofluorimetry. The emissive properties of CDN-SiO2 composites in the form of aero-, cryo- and xerogel were studied. The spectral properties and the efficiency of the emission change in the CDN-SiO2 composites pointed at the effect of CD loading and porous texture of xerogels. Our investigation expands the exploitation of functional carbon dots through the production of fluorescent solid-state composites with tunable porosities.

AB - Blue-emitting nitrogen-doped carbon dots (CDN) produced by a solvent-free method have been successfully incorporated into silica (SiO2) through a sol-gel procedure. By exploiting the co-gelation of the dispersed carbon dots and of the silica matrix, homogeneous distribution of the carbon dots was obtained throughout the matrix. The CDN-SiO2 composites in the form of xero-, cryo-, and aerogels featuring different porous textures were produced by exploiting different gel drying strategies. The most critical parameters and the material features associated to the different synthesis were investigated by transmission electron microscopy, thermal analysis, Mid-infrared spectroscopy, N2 physisorption isotherms and time-resolved spectrofluorimetry. The emissive properties of CDN-SiO2 composites in the form of aero-, cryo- and xerogel were studied. The spectral properties and the efficiency of the emission change in the CDN-SiO2 composites pointed at the effect of CD loading and porous texture of xerogels. Our investigation expands the exploitation of functional carbon dots through the production of fluorescent solid-state composites with tunable porosities.

UR - http://hdl.handle.net/10754/662929

UR - https://linkinghub.elsevier.com/retrieve/pii/S138718112030305X

UR - http://www.scopus.com/inward/record.url?scp=85084664852&partnerID=8YFLogxK

U2 - 10.1016/j.micromeso.2020.110302

DO - 10.1016/j.micromeso.2020.110302

M3 - Article

SN - 1387-1811

VL - 305

SP - 110302

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -

How porosity affects the emission of fluorescent carbon dot-silica porous composites

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