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Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation

In this work, photoactive nanocomposites of ZnO/SiO2 porous heterostructures (PCHs) were prepared from montmorillonite clay. The effects of preparation methods and Zn content on the physicochemical features and photocatalytic properties were investigated. Briefly, a comparison of the use of hydrothe...

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Main Authors: Fatimah, Is, Purwiandono, Gani, Citradewi, Putwi Widya, Sagadevan, Suresh, Oh, Won-Chun, Doong, Ruey-an
Format: Article
Published: MDPI 2021
Subjects:
Q Science (General)
T Technology (General)
Online Access:http://eprints.um.edu.my/28267/
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spelling my.um.eprints.282672022-08-02T01:21:43Z http://eprints.um.edu.my/28267/ Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation Fatimah, Is Purwiandono, Gani Citradewi, Putwi Widya Sagadevan, Suresh Oh, Won-Chun Doong, Ruey-an Q Science (General) T Technology (General) In this work, photoactive nanocomposites of ZnO/SiO2 porous heterostructures (PCHs) were prepared from montmorillonite clay. The effects of preparation methods and Zn content on the physicochemical features and photocatalytic properties were investigated. Briefly, a comparison of the use of hydrothermal and microwave-assisted methods was done. The Zn content was varied between 5 and 15 wt% and the characteristics of the nanomaterials were also examined. The physical and chemical properties of the materials were characterized using X-ray diffraction, diffuse-reflectance UV-Vis, X-ray photoelectron spectroscopy, and gas sorption analyses. The morphology of the synthesized materials was characterized through scanning electron microscopy and transmission electron microscopy. The photocatalytic performance of the prepared materials was quantified through the photocatalytic degradation of methyl violet (MV) under irradiation with UV and visible light. It was found that PCHs exhibit greatly improved physicochemical characteristics as photocatalysts, resulting in boosting photocatalytic activity for the degradation of MV. It was found that varied synthesis methods and Zn content strongly affected the specific surface area, pore distribution, and band gap energy of PCHs. In addition, the band gap energy was found to govern the photoactivity. Additionally, the surface parameters of the PCHs were found to contribute to the degradation mechanism. It was found that the prepared PCHs demonstrated excellent photocatalytic activity and reusability, as seen in the high degradation efficiency attained at high concentrations. No significant changes in activity were seen until five cycles of photodegradation were done. MDPI 2021-12 Article PeerReviewed Fatimah, Is and Purwiandono, Gani and Citradewi, Putwi Widya and Sagadevan, Suresh and Oh, Won-Chun and Doong, Ruey-an (2021) Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation. Nanomaterials, 11 (12). ISSN 2079-4991, DOI https://doi.org/10.3390/nano11123427 <https://doi.org/10.3390/nano11123427>. 10.3390/nano11123427
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
T Technology (General)
spellingShingle Q Science (General)
T Technology (General)
Fatimah, Is
Purwiandono, Gani
Citradewi, Putwi Widya
Sagadevan, Suresh
Oh, Won-Chun
Doong, Ruey-an
Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation
description In this work, photoactive nanocomposites of ZnO/SiO2 porous heterostructures (PCHs) were prepared from montmorillonite clay. The effects of preparation methods and Zn content on the physicochemical features and photocatalytic properties were investigated. Briefly, a comparison of the use of hydrothermal and microwave-assisted methods was done. The Zn content was varied between 5 and 15 wt% and the characteristics of the nanomaterials were also examined. The physical and chemical properties of the materials were characterized using X-ray diffraction, diffuse-reflectance UV-Vis, X-ray photoelectron spectroscopy, and gas sorption analyses. The morphology of the synthesized materials was characterized through scanning electron microscopy and transmission electron microscopy. The photocatalytic performance of the prepared materials was quantified through the photocatalytic degradation of methyl violet (MV) under irradiation with UV and visible light. It was found that PCHs exhibit greatly improved physicochemical characteristics as photocatalysts, resulting in boosting photocatalytic activity for the degradation of MV. It was found that varied synthesis methods and Zn content strongly affected the specific surface area, pore distribution, and band gap energy of PCHs. In addition, the band gap energy was found to govern the photoactivity. Additionally, the surface parameters of the PCHs were found to contribute to the degradation mechanism. It was found that the prepared PCHs demonstrated excellent photocatalytic activity and reusability, as seen in the high degradation efficiency attained at high concentrations. No significant changes in activity were seen until five cycles of photodegradation were done.
format Article
author Fatimah, Is
Purwiandono, Gani
Citradewi, Putwi Widya
Sagadevan, Suresh
Oh, Won-Chun
Doong, Ruey-an
author_facet Fatimah, Is
Purwiandono, Gani
Citradewi, Putwi Widya
Sagadevan, Suresh
Oh, Won-Chun
Doong, Ruey-an
author_sort Fatimah, Is
title Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation
title_short Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation
title_full Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation
title_fullStr Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation
title_full_unstemmed Influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation
title_sort influencing factors in the synthesis of photoactive nanocomposites of zno/sio2-porous heterostructures from montmorillonite and the study for methyl violet photodegradation
publisher MDPI
publishDate 2021
url http://eprints.um.edu.my/28267/
_version_ 1740826000377249792
score 13.211869

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