Preparation and characterization of bismuth oxychloride/reduced graphene oxide for photocatalytic degradation of rhodamine B under white-light light-emitting-diode and sunlight irradiation

Chu Ying Wang, Tsunghsueh Wu, Yang-Wei Lin

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Abstract

Facile and template-free two-step synthesis of bismuth oxychloride/graphene oxide (BiOCl/GO) and bismuth oxychloride/reduced graphene oxide (BiOCl/rGO) photocatalysts for degradation of rhodamine B (RhB) under low-power white light–emitting diode (wLED) irradiation (1.6 W/cm2) and sunlight is demonstrated. These photocatalysts were characterized by transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectrometry, X-ray diffraction, and micro-Raman, Fourier-transform infrared, X-ray photoelectron, and UV–Vis diffuse reflectance spectroscopy. Under wLED irradiation, the prepared BiOCl/rGO photocatalysts exhibited excellent photodegradation activity toward RhB through chromophore cleavage mechanism and toward phenol in the presence of RhB with notable dye-sensitized effect. Through scavenging experiments, superoxide radicals were notably involved in RhB degradation. With the highest charge separation efficiency and lowest recombination rate, the photocatalytic activity of BiOCl/rGO reached a maximum rate constant of 0.1899 min−1, 2.0 and 3.0 times higher than those of BiOCl/GO and BiOCl, respectively. In the stability study, only a slight loss (4.5%) in photodegradation was observed after BiOCl/rGO was used in five cycles of photodegradation runs. Compared with commonly used photocatalyst such as TiO2 (P25), BiOCl/rGO demonstrated superior photocatalytic activity and stability under wLED irradiation for various dyestuffs (rhodamine 6 G, methylene blue, and fast green FCF) in different environmental water samples (lake, pond, and sea water).

Original languageEnglish
Pages (from-to)355-364
Number of pages10
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume371
DOIs
Publication statusPublished - 2019 Feb 15

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rhodamine B
Graphite
sunlight
rhodamine
Bismuth
Oxides
Graphene
bismuth
Light emitting diodes
graphene
light emitting diodes
Irradiation
degradation
Degradation
preparation
irradiation
Photocatalysts
oxides
Photodegradation
Diodes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

Cite this

@article{96d966d3ea284a37b8795ef84e1cd987,
title = "Preparation and characterization of bismuth oxychloride/reduced graphene oxide for photocatalytic degradation of rhodamine B under white-light light-emitting-diode and sunlight irradiation",
abstract = "Facile and template-free two-step synthesis of bismuth oxychloride/graphene oxide (BiOCl/GO) and bismuth oxychloride/reduced graphene oxide (BiOCl/rGO) photocatalysts for degradation of rhodamine B (RhB) under low-power white light–emitting diode (wLED) irradiation (1.6 W/cm2) and sunlight is demonstrated. These photocatalysts were characterized by transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectrometry, X-ray diffraction, and micro-Raman, Fourier-transform infrared, X-ray photoelectron, and UV–Vis diffuse reflectance spectroscopy. Under wLED irradiation, the prepared BiOCl/rGO photocatalysts exhibited excellent photodegradation activity toward RhB through chromophore cleavage mechanism and toward phenol in the presence of RhB with notable dye-sensitized effect. Through scavenging experiments, superoxide radicals were notably involved in RhB degradation. With the highest charge separation efficiency and lowest recombination rate, the photocatalytic activity of BiOCl/rGO reached a maximum rate constant of 0.1899 min−1, 2.0 and 3.0 times higher than those of BiOCl/GO and BiOCl, respectively. In the stability study, only a slight loss (4.5{\%}) in photodegradation was observed after BiOCl/rGO was used in five cycles of photodegradation runs. Compared with commonly used photocatalyst such as TiO2 (P25), BiOCl/rGO demonstrated superior photocatalytic activity and stability under wLED irradiation for various dyestuffs (rhodamine 6 G, methylene blue, and fast green FCF) in different environmental water samples (lake, pond, and sea water).",
author = "Wang, {Chu Ying} and Tsunghsueh Wu and Yang-Wei Lin",
year = "2019",
month = "2",
day = "15",
doi = "10.1016/j.jphotochem.2018.11.043",
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T1 - Preparation and characterization of bismuth oxychloride/reduced graphene oxide for photocatalytic degradation of rhodamine B under white-light light-emitting-diode and sunlight irradiation

AU - Wang, Chu Ying

AU - Wu, Tsunghsueh

AU - Lin, Yang-Wei

PY - 2019/2/15

Y1 - 2019/2/15

N2 - Facile and template-free two-step synthesis of bismuth oxychloride/graphene oxide (BiOCl/GO) and bismuth oxychloride/reduced graphene oxide (BiOCl/rGO) photocatalysts for degradation of rhodamine B (RhB) under low-power white light–emitting diode (wLED) irradiation (1.6 W/cm2) and sunlight is demonstrated. These photocatalysts were characterized by transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectrometry, X-ray diffraction, and micro-Raman, Fourier-transform infrared, X-ray photoelectron, and UV–Vis diffuse reflectance spectroscopy. Under wLED irradiation, the prepared BiOCl/rGO photocatalysts exhibited excellent photodegradation activity toward RhB through chromophore cleavage mechanism and toward phenol in the presence of RhB with notable dye-sensitized effect. Through scavenging experiments, superoxide radicals were notably involved in RhB degradation. With the highest charge separation efficiency and lowest recombination rate, the photocatalytic activity of BiOCl/rGO reached a maximum rate constant of 0.1899 min−1, 2.0 and 3.0 times higher than those of BiOCl/GO and BiOCl, respectively. In the stability study, only a slight loss (4.5%) in photodegradation was observed after BiOCl/rGO was used in five cycles of photodegradation runs. Compared with commonly used photocatalyst such as TiO2 (P25), BiOCl/rGO demonstrated superior photocatalytic activity and stability under wLED irradiation for various dyestuffs (rhodamine 6 G, methylene blue, and fast green FCF) in different environmental water samples (lake, pond, and sea water).

AB - Facile and template-free two-step synthesis of bismuth oxychloride/graphene oxide (BiOCl/GO) and bismuth oxychloride/reduced graphene oxide (BiOCl/rGO) photocatalysts for degradation of rhodamine B (RhB) under low-power white light–emitting diode (wLED) irradiation (1.6 W/cm2) and sunlight is demonstrated. These photocatalysts were characterized by transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectrometry, X-ray diffraction, and micro-Raman, Fourier-transform infrared, X-ray photoelectron, and UV–Vis diffuse reflectance spectroscopy. Under wLED irradiation, the prepared BiOCl/rGO photocatalysts exhibited excellent photodegradation activity toward RhB through chromophore cleavage mechanism and toward phenol in the presence of RhB with notable dye-sensitized effect. Through scavenging experiments, superoxide radicals were notably involved in RhB degradation. With the highest charge separation efficiency and lowest recombination rate, the photocatalytic activity of BiOCl/rGO reached a maximum rate constant of 0.1899 min−1, 2.0 and 3.0 times higher than those of BiOCl/GO and BiOCl, respectively. In the stability study, only a slight loss (4.5%) in photodegradation was observed after BiOCl/rGO was used in five cycles of photodegradation runs. Compared with commonly used photocatalyst such as TiO2 (P25), BiOCl/rGO demonstrated superior photocatalytic activity and stability under wLED irradiation for various dyestuffs (rhodamine 6 G, methylene blue, and fast green FCF) in different environmental water samples (lake, pond, and sea water).

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