Photodegradation kinetics of 2,6-dimetylphenol by natural iron oxide and oxalate in aqueous solution

Belaidi, S.; Sehili, Tahar; Mammeri, L.; Djebbar, K.

doi:10.1016/j.jphotochem.2012.03.023

Cited by 28 publications

(11 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the BWO-EG sample has a lower bandgap and also exhibited low catalytic activity. A possible explanation for this occurrence could be the greater recombination rate since this event decreases the amount of oxidizing species such as hydroxyl radicals, superoxides, and singlet oxygens, which are molecules responsible for dye degradation [13,[50][51][52].…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Morphological evolution and visible light-induced degradation of Rhodamine 6G by nanocrystalline bismuth tungstate prepared using a template-based approach

Silva

Barbosa

Mendonça

et al. 2016

Journal of Physics and Chemistry of Solids

View full text Add to dashboard Cite

The cleaning of water contaminated with organic dyes is a crucial problem nowadays. The search for good catalysts is intense, and bismuth tungstates have attracted a lot of attention because of their catalytic properties which are related to their crystal structure and morphology. In this study, we show that Bi 2 WO 6 (BWO) crystals synthesized by the surfactant-assisted hydrothermal method create a different morphology than non-assisted crystals. With the assistance of the PVP surfactant, even the BWO crystalline structure could change, crystallizing into a high-symmetry metastable phase. These changes in morphology imply a decrease in BWO catalytic activity, which shows that insightful control of BWO synthesis is necessary to improve the BWO properties. & 2016 Elsevier Ltd. All rights reserved. [5,9] and other titanium doped oxides [15-18] being some of the most investigated. Bismuth oxides and derivatives show enormous potential in remediating environments contaminated by organic or inorganic pollutants [19-21]. In particular, tungstates, which constitute another class of metal oxides, are very promising for such applications [22-24]. In particular, bismuth tungstates have attracted attention in the research of nanostructured materials because of their applications as catalysts [25-29]. Bi 2 WO 6 (BWO) has an orthorhombic structure with P2 1 ab space group and belongs to the Aurivillius family of compounds. These compounds have a general formula of (Bi 2 O 2) 2 þ (A n À 1 B n O 3n À 1), where A represents a mono-, bi-, or trivalent ion; B denotes a tetra-, penta-, or hexavalent ion; and n is the BO 6 octahedra number in each pseudo-perovskite block [30]. Many papers have described structural change as a key factor in the enhancement of catalytic properties [19,20]. Therefore, various synthesis methods have been used to obtain new structured materials to enhance the BWO properties [31-33]. The template method, using templates such as ethylene glycol (EG) [34], cetyltrimethylammonium bromide (CTAB) [35], and glycine (gly) [36], has been widely used to promote structural changes in BWO. The compounds obtained in the presence of Contents lists available at ScienceDirect

show abstract

Section: Photocatalytic Activitymentioning

confidence: 99%

Morphological evolution and visible light-induced degradation of Rhodamine 6G by nanocrystalline bismuth tungstate prepared using a template-based approach

Silva

Barbosa

Mendonça

et al. 2016

Journal of Physics and Chemistry of Solids

View full text Add to dashboard Cite

show abstract

“…The removal of several aliphatic carboxylic acids 9,10 as well as aromatic acids such as benzoic acid, polycarboxylic acids, salicylic acid, chlorobenzoic acids, etc., [11][12][13][14] from water using TiO 2 catalyzed PCD has been reported. Besides this, the photocatalytic degradation of the higher aliphatic carboxylic acids such as branched C4 and C5 aliphatic acids using titanium dioxide has also been studied 15 .…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Co:TiO2 Nanocomposites and their Application in Photodegradation of Acetic Acid

2017

Chem Sci Trans

View full text Add to dashboard Cite

Nanocomposites of Co:TiO 2 were prepared by wet chemical methods. The prepared samples were characterized by XRD, SEM, BET, FTIR and UV-Visible spectra. The XRD analysis confirmed the presence of rutile and anatase both phases were present. It is found that rutile phase was more dominant. Applying the Scherrer's calculations through which particle size was found 35 and 80 nm in case of Co:TiO 2 and pure TiO 2 respectively. SEM image of Co:TiO 2 and TiO 2 were observed and both found in nanodiamension. The photocatalytic degradation of acetic acid was done at different condition of concentration, amount of photocatalyst and type of catalyst. The effective photodegradation of acetic acid were found at low concentration and photodegradation increases with decrease the concentration of acetic acid. The prominent degradation of acetic acid was found in the presence of nanocomposites Co:TiO 2 as compared with TiO 2 .

show abstract

“…In nature, iron, oxalic acid and sunlight can establish an homogeneous photoFenton-Like system when iron exists in dissolved form or heterogeneous photo-Fenton-Like A c c e p t e d M a n u s c r i p t 2 system where iron is in solid form. [11][12][13] The aim of this work was to observe the photodegradation of fenuron by using a natural iron oxide (NIO). The role of carboxylic acids in this photochemical process and the degradation pathway was also elucidated.…”

Section: Introductionmentioning

confidence: 99%

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids

Kribéche¹,

Mechakra²,

Sehili³

et al. 2015

Environmental Technology

View full text Add to dashboard Cite

The photodegradation of the herbicide fenuron (1,1-dimethyl-3-phenylurea) by using a natural iron oxide (NIO), α-Fe2O3, in aqueous solution at acidic pH has been undertaken. The NIO was characterized by the Raman spectroscopy method. The degradation pathways and the formation of degradation products were studied. A high-pressure mercury lamp and sunlight were employed as light source. Fenuron photodegradation using NIO with oxalic acid followed the pseudo-first-order kinetics, the optimal experimental conditions were [oxalic acid]0 = 10(-3) M and [NIO] = 0.1 g L(-1) at pH 3. A UVA/NIO/oxalic acid system led to a low fenuron half-life (60 min). The results were even better when solar light is used (30 min). The variables studied were the doses of iron oxide, of carboxylic acids, the solution pH and the effect of sunlight irradiation. The effects of four carboxylic acids, oxalic, citric, tartaric and malic acids, on the fenuron photodegradation with NIO have been investigated, oxalic acid was the most effective carboxylic acid used at pH 3. A similar trend was observed for the removal of total organic carbon (TOC), 75% of TOC was removed. The analytical study showed many aromatic intermediates, short-chain carboxylic acids and inorganic ion.

show abstract

Photodegradation kinetics of 2,6-dimetylphenol by natural iron oxide and oxalate in aqueous solution

Cited by 28 publications

References 29 publications

Morphological evolution and visible light-induced degradation of Rhodamine 6G by nanocrystalline bismuth tungstate prepared using a template-based approach

Morphological evolution and visible light-induced degradation of Rhodamine 6G by nanocrystalline bismuth tungstate prepared using a template-based approach

Photocatalytic Activity of Co:TiO2 Nanocomposites and their Application in Photodegradation of Acetic Acid

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids

Contact Info

Product

Resources

About

Photodegradation kinetics of 2,6-dimetylphenol by natural iron oxide and oxalate in aqueous solution

Cited by 28 publications

References 29 publications

Morphological evolution and visible light-induced degradation of Rhodamine 6G by nanocrystalline bismuth tungstate prepared using a template-based approach

Morphological evolution and visible light-induced degradation of Rhodamine 6G by nanocrystalline bismuth tungstate prepared using a template-based approach

Photocatalytic Activity of Co:TiO2 Nanocomposites and their Application in Photodegradation of Acetic Acid

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe2O3, influence of polycarboxylic acids

Contact Info

Product

Resources

About

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids