Novel Bi2WO6–TiO2 heterostructures for Rhodamine B degradation under sunlike irradiation

Murcia-López, Sebastián; Hidalgo, M.C.; Navı́o, J.A.; Colón, G.

doi:10.1016/j.jhazmat.2010.10.065

Cited by 91 publications

(16 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The predominance of the N ‐deethylated or the direct chromophore cleavage mechanism depends both on the material and the kind of irradiation. Moreover, as we also concluded in our previous work , both occur under UV–Vis light and almost no direct rupture takes place under only visible illumination.…”

Section: Discussionsupporting

confidence: 86%

“…Besides the importance of the discoloration process, the use of dyes as model pollutants is partly justified in the fact that their concentration can be easily monitored using a spectrometer. In fact, in a previous study , we report a deep insight into the mechanism of RhB photooxidation using the heterostructure formed by Bi 2 WO 6 and TiO 2 , comparing its photocatalytic behavior with Bi 2 WO 6 to establish the improved effect of TiO 2 incorporation. The evolution of N ‐deethylated intermediates under different illumination conditions was also reported in this work.…”

Section: Introductionmentioning

confidence: 99%

“…The preparation conditions were chosen based on those that led to more active materials for the photocatalytic degradation of Rhodamine B as indicated in our previous report .…”

Section: Introductionmentioning

confidence: 99%

“…Some of the physicochemical properties of the synthesized samples(40). In the case of TiO 2 (*), the crystallite size corresponds to the anatase phase.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Degradation of Rhodamine B/Phenol Mixtures in Water by Sun‐Like Excitation of a Bi₂WO₆–TiO₂ Photocatalyst

Murcia-López

Hidalgo

Navı́o

2013

Photochem & Photobiology

View full text Add to dashboard Cite

Bi2 WO6 and Bi2 WO6-TiO2 (5% molar Ti) nano-heterostructures were synthesized by a hydrothermal method. The properties of the synthesized catalysts were characterized, having high photoactivity for Rhodamine B degradation under sun-like illumination, explained by a synergetic mechanism previously proposed through UV and visible induced processes, in which the photosensitization effect of Rhodamine B is considered. We now report that using Phenol, a molecule which does not lead the photosensitization process, the photoactivity decreased considerably, thus emphasizing how important is the model molecule selected as degradation substrate for evaluating the photoactivity. The photocatalytic properties of the synthesized catalysts have been evaluated by exposing a mixture of Rhodamine B and Phenol in water, to different illumination conditions. It can be confirmed that the photoinduced mechanism via the photosensitization of Rhodamine B is a key factor responsible for the increase on the photocatalytic activity showed by the Bi2 WO6-TiO2 compound and that the degradation mechanism of Rhodamine B is not changed by the simultaneous presence of other transparent substrate as Phenol.

show abstract

Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

“…The preparation conditions were chosen based on those that led to more active materials for the photocatalytic degradation of Rhodamine B as indicated in our previous report .…”

Section: Introductionmentioning

confidence: 99%

“…Some of the physicochemical properties of the synthesized samples(40). In the case of TiO 2 (*), the crystallite size corresponds to the anatase phase.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Degradation of Rhodamine B/Phenol Mixtures in Water by Sun‐Like Excitation of a Bi₂WO₆–TiO₂ Photocatalyst

Murcia-López

Hidalgo

Navı́o

2013

Photochem & Photobiology

View full text Add to dashboard Cite

show abstract

“…More obviously, the maximum absorption of the reaction solution wavelength shifted dramatically from 553 nm to 494 nm by 59 nm (Figure 7d). Based on the previous literature [39][40][41][42] and LC-MS analysis discussed below, the blue shift of the RhB reaction solution suggests that N-deethylation of rhodamine B was conducted. Therefore, the doping of oxygen atom in O-g-C 3 N 4 eVidently enhanced the photocatalytic activity for the N-deethylation of RhB.…”

Section: Photocatalytic Activity Of O-g-c 3 N 4 For Selective N-deethylation Of Rhbmentioning

confidence: 88%

Metal-Free Enhanced Photocatalytic Activation of Dioxygen by g-C3N4 Doped with Abundant Oxygen-Containing Functional Groups for Selective N-Deethylation of Rhodamine B

2019

View full text Add to dashboard Cite

To develop highly efficient heterogeneous photocatalysts for the activation of dissolved oxygen is very interesting in the field of green degradation of organic pollutants. In the paper, oxygen atom doped g-C3N4 (O-g-C3N4) was prepared via a facile chemical oxidation of g-C3N4 by peroxymonosulfate. X-ray photoelectron spectroscopy analysis suggests the oxidative treatment of g-C3N4 by peroxymonosulfate evidently increased atomic percentage of oxygen on O-g-C3N4 surface to 6.9% as compared with 1.8% for g-C3N4. Meanwhile, the doped oxygen atom mainly existed as carbonyl and carboxyl groups. Optical characterization indicates the introduction of oxygen improved the response of O-g-C3N4 to visible light, and more obviously, separation of photo-generated h+-e−. 4-chloro-7-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl) probe measurement indicates the formation of O2•− was dramatically enhanced through activation of dioxygen by photo-generated electrons in the O-g-C3N4 photocatalytic system. Through high performance liquid chromatography (HPLC) and Liquid chromatography–mass spectrometry (LC-MS) analysis, it was found rhodamine B (RhB) photocatalytic degradation by O-g-C3N4 followed step by step N-deethylation reaction pathways induced by the formed O2•−, rather than the non-selective decomposition of the chromophore in RhB by other radicals, such as hydroxyl radicals. This study provides a facile method to develop oxygen atom doped g-C3N4 photocatalyst, and also clarifies its photocatalytic activation mechanism of molecular oxygen for N-deethylation reaction of RhB.

show abstract

Nanocatalysis: Catalysis with Nanoscale Materials

Asefa

Huang

2017

Handbook of Solid State Chemistry

View full text Add to dashboard Cite

This chapter is intended to provide readers with basic information on the synthesis, characterization, and potential applications of nanostructured catalysts. The chapter starts with a brief introduction of nanomaterials and catalysis. It then introduces nanocatalysis. The chapter then delves into discussions of the different types of nanocatalytic materials and the notable synthetic methods used for making them, followed by the fundamental aspects of their size‐ and shape‐dependent catalytic properties and structure–catalytic property relationships. The chapter also includes discussion on the properties of various nanostructured catalysts. In each topic, there are mentions of the various applications or potential applications of nanoscale materials for catalysis of numerous important chemical reactions, ranging from those that enable the efficient production of commodity and value‐added chemical products to those that allow the generation of renewable energy. Finally, the chapter outlines the authors' opinions on the future outlooks of the field of nanocatalysis. Most of the discussions will rely on notable, but not exhaustive, examples from the literature.

show abstract

Novel Bi2WO6–TiO2 heterostructures for Rhodamine B degradation under sunlike irradiation

Cited by 91 publications

References 20 publications

Degradation of Rhodamine B/Phenol Mixtures in Water by Sun‐Like Excitation of a Bi₂WO₆–TiO₂ Photocatalyst

Degradation of Rhodamine B/Phenol Mixtures in Water by Sun‐Like Excitation of a Bi₂WO₆–TiO₂ Photocatalyst

Metal-Free Enhanced Photocatalytic Activation of Dioxygen by g-C3N4 Doped with Abundant Oxygen-Containing Functional Groups for Selective N-Deethylation of Rhodamine B

Nanocatalysis: Catalysis with Nanoscale Materials

Contact Info

Product

Resources

About

Novel Bi2WO6–TiO2 heterostructures for Rhodamine B degradation under sunlike irradiation

Cited by 91 publications

References 20 publications

Degradation of Rhodamine B/Phenol Mixtures in Water by Sun‐Like Excitation of a Bi2WO6–TiO2 Photocatalyst

Degradation of Rhodamine B/Phenol Mixtures in Water by Sun‐Like Excitation of a Bi2WO6–TiO2 Photocatalyst

Metal-Free Enhanced Photocatalytic Activation of Dioxygen by g-C3N4 Doped with Abundant Oxygen-Containing Functional Groups for Selective N-Deethylation of Rhodamine B

Nanocatalysis: Catalysis with Nanoscale Materials

Contact Info

Product

Resources

About

Degradation of Rhodamine B/Phenol Mixtures in Water by Sun‐Like Excitation of a Bi₂WO₆–TiO₂ Photocatalyst

Degradation of Rhodamine B/Phenol Mixtures in Water by Sun‐Like Excitation of a Bi₂WO₆–TiO₂ Photocatalyst