صورة الغلاف

Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation

An effective photocatalyst for environmental rehabilitation, reduced graphene oxide (rGO) supported on silica-zirconia (Si/Zr) was synthesized by simple microwave and sonication methods after varying rGO loading (1, 5 and 10 wt%), and denoted as 1, 5 and 10 rGO/Si/Zr. The catalysts were characterize...

وصف كامل

محفوظ في:
التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Hassan, N. S., A. Jalil, A., Khusnun, N. F., Ali, M. W., Haron, S.
التنسيق: مقال
منشور في: Elsevier Ltd. 2019
الموضوعات:
TP Chemical technology
الوصول للمادة أونلاين:http://eprints.utm.my/id/eprint/88441/
http://dx.doi.org/10.1016/j.jallcom.2019.03.105
الوسوم: إضافة وسم
لا توجد وسوم, كن أول من يضع وسما على هذه التسجيلة!
id my.utm.88441
record_format eprints
spelling my.utm.884412020-12-15T00:06:26Z http://eprints.utm.my/id/eprint/88441/ Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation Hassan, N. S. A. Jalil, A. Khusnun, N. F. Ali, M. W. Haron, S. TP Chemical technology An effective photocatalyst for environmental rehabilitation, reduced graphene oxide (rGO) supported on silica-zirconia (Si/Zr) was synthesized by simple microwave and sonication methods after varying rGO loading (1, 5 and 10 wt%), and denoted as 1, 5 and 10 rGO/Si/Zr. The catalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption, Fourier-transform infrared (FTIR), electron spin resonance (ESR), and ultraviolet–visible diffuse reflectance spectroscopy (UV–vis DRS) analyses. Catalytic activity towards photodegradation of Bisphenol A (BPA) was ranked in the following order: 5 rGO/Si/Zr (87%) > 1 rGO/Si/Zr (81%) > 10 rGO/Si/Zr (71%). The highest photoactivity of 5 rGO/Si/Zr was found to be due to the excess unpaired electrons in Si/Zr, induced by the rGO, which resulted in a remarkable excitation of electrons and, subsequently, accelerated the photocatalytic activity. In addition, optimum carbon–support interactions possessed by the 5 rGO/Si/Zr improved the interfacial charge transfer at a strategic energy level of rGO and efficiently suppressed the electron–hole recombination. The photokinetics of degradation followed the pseudo-first-order Langmuir-Hinshelwood model. The ESR trapping and scavenger experiments further confirmed that the photogenerated electron played a crucial role in mediating the degradation of BPA. The 5 rGO/Si/Zr was still active after 5 runs, indicating its potential for degradation of BPA in wastewater from the plastics industry. The 5 rGO/Si/Zr also demonstrated lower energy consumption and cost estimation towards the photodegradation of BPA. Elsevier Ltd. 2019-06-15 Article PeerReviewed Hassan, N. S. and A. Jalil, A. and Khusnun, N. F. and Ali, M. W. and Haron, S. (2019) Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation. Journal of Alloys and Compounds, 789 . pp. 221-230. ISSN 0925-8388 http://dx.doi.org/10.1016/j.jallcom.2019.03.105 DOI:10.1016/j.jallcom.2019.03.105
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Hassan, N. S.
A. Jalil, A.
Khusnun, N. F.
Ali, M. W.
Haron, S.
Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation
description An effective photocatalyst for environmental rehabilitation, reduced graphene oxide (rGO) supported on silica-zirconia (Si/Zr) was synthesized by simple microwave and sonication methods after varying rGO loading (1, 5 and 10 wt%), and denoted as 1, 5 and 10 rGO/Si/Zr. The catalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption, Fourier-transform infrared (FTIR), electron spin resonance (ESR), and ultraviolet–visible diffuse reflectance spectroscopy (UV–vis DRS) analyses. Catalytic activity towards photodegradation of Bisphenol A (BPA) was ranked in the following order: 5 rGO/Si/Zr (87%) > 1 rGO/Si/Zr (81%) > 10 rGO/Si/Zr (71%). The highest photoactivity of 5 rGO/Si/Zr was found to be due to the excess unpaired electrons in Si/Zr, induced by the rGO, which resulted in a remarkable excitation of electrons and, subsequently, accelerated the photocatalytic activity. In addition, optimum carbon–support interactions possessed by the 5 rGO/Si/Zr improved the interfacial charge transfer at a strategic energy level of rGO and efficiently suppressed the electron–hole recombination. The photokinetics of degradation followed the pseudo-first-order Langmuir-Hinshelwood model. The ESR trapping and scavenger experiments further confirmed that the photogenerated electron played a crucial role in mediating the degradation of BPA. The 5 rGO/Si/Zr was still active after 5 runs, indicating its potential for degradation of BPA in wastewater from the plastics industry. The 5 rGO/Si/Zr also demonstrated lower energy consumption and cost estimation towards the photodegradation of BPA.
format Article
author Hassan, N. S.
A. Jalil, A.
Khusnun, N. F.
Ali, M. W.
Haron, S.
author_facet Hassan, N. S.
A. Jalil, A.
Khusnun, N. F.
Ali, M. W.
Haron, S.
author_sort Hassan, N. S.
title Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation
title_short Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation
title_full Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation
title_fullStr Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation
title_full_unstemmed Role of reduced graphene oxide in improving interfacial charge transfer of hybridized rGO/silica/zirconia for enhanced Bisphenol A photodegradation
title_sort role of reduced graphene oxide in improving interfacial charge transfer of hybridized rgo/silica/zirconia for enhanced bisphenol a photodegradation
publisher Elsevier Ltd.
publishDate 2019
url http://eprints.utm.my/id/eprint/88441/
http://dx.doi.org/10.1016/j.jallcom.2019.03.105
_version_ 1687393571899965440
score 13.251813

مواد مشابهة