Cited by 242TiO2 Photocatalysis and Solar CellsAdvanced oxidation water treatmentAdvanced Photocatalysis Techniques

Microwave photocatalytic degradation of Rhodamine B using TiO2 supported on activated carbon: Mechanism implication

HE, Zhong, YANG, Shaogui, JU, Yongming, SUN, Cheng·2009·Journal of Environmental Sciences

Abstract

The photocatalytic degradation of Rhodamine B (RhB) was carried out using TiO2 supported on activated carbon (TiO2-AC) under microwave irradiation. Composite catalyst TiO2-AC was prepared and characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET). In the process of microwave-enhanced photocatalysis (MPC), RhB (30 mg/L) was almost completely decoloured in 10 min, and the mineralization efficiency was 96.0% in 20 min. The reaction rate constant of RhB in MPC using TiO2-AC by pseudo first-order reaction kinetics was 4.16 times of that using Degussa P25. Additionally, according to gas chromatography/mass spectrometry (GC/MS) and liquid chromatography/mass spectrometry (LC/MS) identification, the major intermediates of RhB in MPC included two kinds of N-de-ethylation intermediates (N,N-diethyl-N'-ethyl-rhodamine (DER)), oxalic acid, malonic acid, succinic acid, and phthalic acid, maleic acid, 3-nitrobenzoic acid, and so on. The degradation of RhB in MPC was mainly attributed to the destruction of the conjugated structure, and then the intermediates transformed to acid molecules which were mineralized to water and carbon dioxide.

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Crossref · 10.1016/s1001-0742(08)62262-7

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13 of 13 references verified0 citation errors · 0 not checkable

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  • The TiO2/AC composite has been used in conjunction with microwave-enhanced photodegradation of Rhodamine B (RhB) for destruction of the conjugated structure, which was much faster than photocatalytic degradation methods.

    “The TiO 2 /AC composite has been used in conjunction with microwave (MW)-enhanced photodegradation of Rhodamine B (RhB) for the destruction of the conjugated structure, which was much faster than the photocatalytic degradation methods.118”
  • Activated carbon is a porous, amorphous solid carbon material derived mainly from carbonaceous or plant-based (lignocellulosic) materials and can be used as a support for TiO2.

    “Activated carbon (AC), also termed active carbon, activated charcoal, or activated coal, is a porous, amorphous solid carbon material derived mainly from carbonaceous or plantbased (lignocellulosic) materials such as coconut shell, [113][114][115][116][117][118][119] activated charcoal, 120 sawdust of Tabebuia pentaphyla wood, 121-124 pine sawdust, 125 beech sawdust, 126 peach stones, 127 almond”

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Authors
HE, Z., YANG, S., JU, Y., & SUN, C.
Affiliations
State Key Laboratory of Pollution Control and Resource Reuse (CN)
Corresponding author
SUN, Cheng
Venue
Journal of Environmental Sciences
Publisher
Elsevier BV
Published
2009
Volume
21
Issue
2
Pages
268-272
ISSN
1001-0742 (ISSN-L)
OpenAlex
W2039530054
Cited by
242
References
14
Citations by year
2026: 13 · 2025: 12 · 2024: 10 · 2023: 14 · 2022: 15 · 2021: 17 · 2020: 20 · 2019: 23 · 2018: 14 · 2017: 21 · 2016: 11 · 2015: 19 · 2014: 11 · 2013: 18 · 2012: 11
FWCI
3.75
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Environmental Sciences (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
Keywords
rhodamine B, photocatalytic degradation, TiO2/activated carbon composite, dye mineralization, degradation intermediates, reaction kinetics, mineralization
MeSH terms
Catalysis, Charcoal, Chromatography, Liquid, Kinetics, Gas Chromatography-Mass Spectrometry, Microscopy, Electron, Scanning, Microwaves, Photolysis, Rhodamines, Titanium, X-Ray Diffraction

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