Fabrication, characterization and response surface method optimization for quantum efficiency of fluorescent nitrogen-doped carbon dots obtained from carboxymethylcellulose of oil palms empty fruit bunch
Bio based nitrogen doped carbon dots (N-CDs) were obtained from empty fruit bunch carboxymethylcellulose and ethylenediamine (EDA) through one-pot hydrothermal carbonization route. The optimum as-formed N-CDs were thoroughly characterized via Transmission electron microscopy (TEM), high-resolution T...
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Published in | Chinese journal of chemical engineering Vol. 28; no. 2; pp. 584 - 592 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.02.2020
Department of Chemical and Environmental Engineering Faculty of Engineering Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia%Department of Computer & Communications Systems Engineering, Faculty of Engineering Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia%Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia |
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Abstract | Bio based nitrogen doped carbon dots (N-CDs) were obtained from empty fruit bunch carboxymethylcellulose and ethylenediamine (EDA) through one-pot hydrothermal carbonization route. The optimum as-formed N-CDs were thoroughly characterized via Transmission electron microscopy (TEM), high-resolution TEM (HRTEM), Fourier transform infrared (FTIR), X-ray photoelectron spectra (XPS), UV–vis spectra (UV–Vis) and Fluorescence spectra (PL). Response surface methodology was statistically used to assess three independent variables that have major influence on the fluorescence quantum yield (QY), including temperature (230–270 °C), time (2–6 h) and EDA mass (10%–23.3%). Based on analysis of variance (ANOVA) results, synthesis temperature was found to be the most influential factor on the QY, followed by time and EDA mass. Higher temperature, long synthesis time and high amount of EDA were satisfactorily enough for efficient carbonization conversion rate and obtaining highest QY of N-CDs. The obtained quadratic model (R2 = 0.9991) shows a good correlation between the experimental data and predicted values. The optimum synthetic parameters are of 270 °C temperature, 6 h reaction time and 23.3% of EDA mass. The optimized as-made N-CDs exhibited blue photoluminescence with both excitation dependent/independent phenomena and high nitrogen content. The maximum emission intensity was 426 nm at a maximum excitation wavelength of 320 nm, with a QY of up to 22.9%. XPS and FTIR data confirmed the existence of polar containing groups, such as carbonyl, carboxyl, hydroxyl and amino groups over the surface of N-CDs whereas nitrogen species in the form of (pyridinic and graphitic −N) were introduced in the aromatic carbon domains, which imparts the hydrophilic and photostability of N-CDs. Taking into account the low-cost and sustainable production of N-CDs, this method considered a feasible route for converting low quality waste into value-added nanomaterials and utilizing for different functionalization processes and analytical applications. |
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AbstractList | Bio based nitrogen doped carbon dots (N-CDs) were obtained from empty fruit bunch carboxymethylcellulose and ethylenediamine (EDA) through one-pot hydrothermal carbonization route.The optimum as-formed NCDs were thoroughly characterized via Transmission electron microscopy (TEM),high-resolution TEM (HRTEM),Fourier transform infrared (FTIR),X-ray photoelectron spectra (XPS),UV-vis spectra (UV-Vis) and Fluorescence spectra (PL).Response surface methodology was statistically used to assess three independent variables that have major influence on the fluorescence quantum yield (QY),including temperature (230-270 ℃),time (2-6 h) and EDA mass (10%-23.3%).Based on analysis of variance (ANOVA) results,synthesis temperature was found to be the most influential factor on the QY,followed by time and EDA mass.Higher temperature,long synthesis time and high amount of EDA were satisfactorily enough for efficient carbonization conversion rate and obtaining highest QY of N-CDs.The obtained quadratic model (R2 =0.9991) shows a good correlation between the experimental data and predicted values.The optimum synthetic parameters are of 270 ℃ temperature,6 h reaction time and 23.3% of EDA mass.The optimized as-made N-CDs exhibited blue photoluminescence with both excitation dependent/independent phenomena and high nitrogen content.The maximum emission intensity was 426 nm at a maximum excitation wavelength of 320 nm,with a QY of up to 22.9%.XPS and FTIR data confirmed the existence of polar containing groups,such as carbonyl,carboxyl,hydroxyl and amino groups over the surface of N-CDs whereas nitrogen species in the form of (pyridinic and graphitic-N) were introduced in the aromatic carbon domains,which imparts the hydrophilic and photostability of N-CDs.Taking into account the low-cost and sustainable production of N-CDs,this method considered a feasible route for converting low quality waste into value-added nanomaterials and utilizing for different functionalization processes and analytical applications. Bio based nitrogen doped carbon dots (N-CDs) were obtained from empty fruit bunch carboxymethylcellulose and ethylenediamine (EDA) through one-pot hydrothermal carbonization route. The optimum as-formed N-CDs were thoroughly characterized via Transmission electron microscopy (TEM), high-resolution TEM (HRTEM), Fourier transform infrared (FTIR), X-ray photoelectron spectra (XPS), UV–vis spectra (UV–Vis) and Fluorescence spectra (PL). Response surface methodology was statistically used to assess three independent variables that have major influence on the fluorescence quantum yield (QY), including temperature (230–270 °C), time (2–6 h) and EDA mass (10%–23.3%). Based on analysis of variance (ANOVA) results, synthesis temperature was found to be the most influential factor on the QY, followed by time and EDA mass. Higher temperature, long synthesis time and high amount of EDA were satisfactorily enough for efficient carbonization conversion rate and obtaining highest QY of N-CDs. The obtained quadratic model (R2 = 0.9991) shows a good correlation between the experimental data and predicted values. The optimum synthetic parameters are of 270 °C temperature, 6 h reaction time and 23.3% of EDA mass. The optimized as-made N-CDs exhibited blue photoluminescence with both excitation dependent/independent phenomena and high nitrogen content. The maximum emission intensity was 426 nm at a maximum excitation wavelength of 320 nm, with a QY of up to 22.9%. XPS and FTIR data confirmed the existence of polar containing groups, such as carbonyl, carboxyl, hydroxyl and amino groups over the surface of N-CDs whereas nitrogen species in the form of (pyridinic and graphitic −N) were introduced in the aromatic carbon domains, which imparts the hydrophilic and photostability of N-CDs. Taking into account the low-cost and sustainable production of N-CDs, this method considered a feasible route for converting low quality waste into value-added nanomaterials and utilizing for different functionalization processes and analytical applications. |
Author | Abdul-Rashid, Suraya Mahdi, Mohd Adzir Ibrahim, Nor Azowa Pudza, Musa Y. Abidin, Zurina Zainal Abdullah Issa, Mohammed Sobri, Shafreeza |
AuthorAffiliation | Department of Chemical and Environmental Engineering Faculty of Engineering Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia%Department of Computer & Communications Systems Engineering, Faculty of Engineering Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia%Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia |
AuthorAffiliation_xml | – name: Department of Chemical and Environmental Engineering Faculty of Engineering Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia%Department of Computer & Communications Systems Engineering, Faculty of Engineering Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia%Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia |
Author_xml | – sequence: 1 givenname: Mohammed surname: Abdullah Issa fullname: Abdullah Issa, Mohammed organization: Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia – sequence: 2 givenname: Zurina Zainal surname: Abidin fullname: Abidin, Zurina Zainal email: zurina@upm.edu.my organization: Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia – sequence: 3 givenname: Shafreeza surname: Sobri fullname: Sobri, Shafreeza organization: Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia – sequence: 4 givenname: Suraya surname: Abdul-Rashid fullname: Abdul-Rashid, Suraya organization: Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia – sequence: 5 givenname: Mohd Adzir surname: Mahdi fullname: Mahdi, Mohd Adzir organization: Department of Computer & Communications Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia – sequence: 6 givenname: Nor Azowa surname: Ibrahim fullname: Ibrahim, Nor Azowa organization: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia – sequence: 7 givenname: Musa Y. surname: Pudza fullname: Pudza, Musa Y. organization: Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia |
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SubjectTerms | Carbon dots Fluorescence Nitrogen doped Optimization Response surface methodology |
Title | Fabrication, characterization and response surface method optimization for quantum efficiency of fluorescent nitrogen-doped carbon dots obtained from carboxymethylcellulose of oil palms empty fruit bunch |
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