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i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light

Lignin depolymerization for the purpose of synthesizing aromatic molecules is a growing focus of research to find alternative energy sources. In current studies, the photocatalytic depolymerization of lignin has been investigated by two new iso-propylamine-based lead chloride perovskite nanomaterial...

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Main Authors: Kausar, Samia, Altaf, Ataf Ali, Hamayun, Muhammad, Rasool, Nasir, Hadait, Mahwish, Akhtar, Arusa, Shabbir, Muhammad, Badshah, Amin, Ali Shah, Syed Adnan, Zakaria, Zainul Amiruddin
Format: Article
Language:English
Published: Multidisciplinary Digital Publishing Institute 2020
Online Access:http://psasir.upm.edu.my/id/eprint/89465/1/UV.pdf
http://psasir.upm.edu.my/id/eprint/89465/
https://www.mdpi.com/1420-3049/25/15/3520
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spelling my.upm.eprints.894652021-08-18T09:11:31Z http://psasir.upm.edu.my/id/eprint/89465/ i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light Kausar, Samia Altaf, Ataf Ali Hamayun, Muhammad Rasool, Nasir Hadait, Mahwish Akhtar, Arusa Shabbir, Muhammad Badshah, Amin Ali Shah, Syed Adnan Zakaria, Zainul Amiruddin Lignin depolymerization for the purpose of synthesizing aromatic molecules is a growing focus of research to find alternative energy sources. In current studies, the photocatalytic depolymerization of lignin has been investigated by two new iso-propylamine-based lead chloride perovskite nanomaterials (SK9 and SK10), synthesized by the facile hydrothermal method. Characterization was done by Powder X-Ray Diffraction (PXRD), Scanning Electron Microscopy (SEM), UV-Visible (UV-Vis), Photoluminescence (PL), and Fourier-Transform Infrared (FTIR) Spectroscopy and was used for the photocatalytic depolymerization of lignin under UV light. Lignin depolymerization was monitored by taking absorption spectra and catalytic paths studied by applying kinetic models. The %depolymerization was calculated for factors such as catalyst dose variation, initial concentration of lignin, and varying temperatures. Pseudo-second order was the best suited kinetic model, exhibiting a mechanism for lignin depolymerization that was chemically rate controlled. The activation energy (Ea) for the depolymerization reaction was found to be 15 kJ/mol, which is remarkably less than conventional depolymerization of the lignin, i.e., 59.75 kJ/mol, exhibiting significant catalytic efficiencies of synthesized perovskites. Products of lignin depolymerization obtained after photocatalytic activity at room temperature (20 °C) and at 90 °C were characterized by GC-MS analysis, indicating an increase in catalytic lignin depolymerization structural subunits into small monomeric functionalities at higher temperatures. Specifically, 2-methoxy-4-methylphenol (39%), benzene (17%), phenol (10%) and catechol (7%) were detected by GC-MS analysis of lignin depolymerization products. Multidisciplinary Digital Publishing Institute 2020 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/89465/1/UV.pdf Kausar, Samia and Altaf, Ataf Ali and Hamayun, Muhammad and Rasool, Nasir and Hadait, Mahwish and Akhtar, Arusa and Shabbir, Muhammad and Badshah, Amin and Ali Shah, Syed Adnan and Zakaria, Zainul Amiruddin (2020) i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light. Molecules, 25 (15). art. no. 3520. pp. 1-24. ISSN 1420-3049 https://www.mdpi.com/1420-3049/25/15/3520 10.3390/molecules25153520
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Lignin depolymerization for the purpose of synthesizing aromatic molecules is a growing focus of research to find alternative energy sources. In current studies, the photocatalytic depolymerization of lignin has been investigated by two new iso-propylamine-based lead chloride perovskite nanomaterials (SK9 and SK10), synthesized by the facile hydrothermal method. Characterization was done by Powder X-Ray Diffraction (PXRD), Scanning Electron Microscopy (SEM), UV-Visible (UV-Vis), Photoluminescence (PL), and Fourier-Transform Infrared (FTIR) Spectroscopy and was used for the photocatalytic depolymerization of lignin under UV light. Lignin depolymerization was monitored by taking absorption spectra and catalytic paths studied by applying kinetic models. The %depolymerization was calculated for factors such as catalyst dose variation, initial concentration of lignin, and varying temperatures. Pseudo-second order was the best suited kinetic model, exhibiting a mechanism for lignin depolymerization that was chemically rate controlled. The activation energy (Ea) for the depolymerization reaction was found to be 15 kJ/mol, which is remarkably less than conventional depolymerization of the lignin, i.e., 59.75 kJ/mol, exhibiting significant catalytic efficiencies of synthesized perovskites. Products of lignin depolymerization obtained after photocatalytic activity at room temperature (20 °C) and at 90 °C were characterized by GC-MS analysis, indicating an increase in catalytic lignin depolymerization structural subunits into small monomeric functionalities at higher temperatures. Specifically, 2-methoxy-4-methylphenol (39%), benzene (17%), phenol (10%) and catechol (7%) were detected by GC-MS analysis of lignin depolymerization products.
format Article
author Kausar, Samia
Altaf, Ataf Ali
Hamayun, Muhammad
Rasool, Nasir
Hadait, Mahwish
Akhtar, Arusa
Shabbir, Muhammad
Badshah, Amin
Ali Shah, Syed Adnan
Zakaria, Zainul Amiruddin
spellingShingle Kausar, Samia
Altaf, Ataf Ali
Hamayun, Muhammad
Rasool, Nasir
Hadait, Mahwish
Akhtar, Arusa
Shabbir, Muhammad
Badshah, Amin
Ali Shah, Syed Adnan
Zakaria, Zainul Amiruddin
i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light
author_facet Kausar, Samia
Altaf, Ataf Ali
Hamayun, Muhammad
Rasool, Nasir
Hadait, Mahwish
Akhtar, Arusa
Shabbir, Muhammad
Badshah, Amin
Ali Shah, Syed Adnan
Zakaria, Zainul Amiruddin
author_sort Kausar, Samia
title i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light
title_short i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light
title_full i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light
title_fullStr i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light
title_full_unstemmed i-Propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under UV light
title_sort i-propylammonium lead chloride based perovskite photocatalysts for depolymerization of lignin under uv light
publisher Multidisciplinary Digital Publishing Institute
publishDate 2020
url http://psasir.upm.edu.my/id/eprint/89465/1/UV.pdf
http://psasir.upm.edu.my/id/eprint/89465/
https://www.mdpi.com/1420-3049/25/15/3520
_version_ 1709669016203689984
score 13.211869

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