Copper octacarboxyphthalocyanine as sensitizer of graphitic carbon nitride for efficient dye degradation under visible light irradiation

Ouédraogo, Seydou; Chouchene, Bilel; Desmarets, Christophe; Gries, Thomas; Balan, Lavinia; Fournet, René; Medjahdi, Ghouti; Bayo, Karifa; Schneider, Raphaël

doi:10.1016/j.apcata.2018.06.036

Cited by 35 publications

(35 citation statements)

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“…In another study 43 , the authors found that due to the inhibition of the light absorption by intermediate accumulation on the surface of CuFePc-PAN, a 12% decline of RhB removal was observed after five running cycles. In the study of Ouedraogo et al 52 the percentage of Orange II removal only slightly decreases from 95.8 to 91.2% after the fifth cycle. Our results are in good agreement with those reported in the literature so far.…”

Section: Kinetics Of Bpa Photodegradation and Cytotoxicity Of The Sammentioning

confidence: 85%

Iron phthalocyanine-sensitized magnetic catalysts for BPA photodegradation

Neamţu

Nădejde

Brinza

et al. 2020

Sci Rep

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the catalytic behavior of iron phthalocyanine (fepc)-sensitized magnetic nanocatalysts was evaluated for their application in the oxidative treatment of Bisphenol A (BpA) under mild environmental conditions. two types of fepc (fe(ii)pc and fe(iii)pc), which are highly photosensitive compounds, were immobilized on the surface of functionalized magnetite. the nanomaterials were characterized by high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (ftiR) and thermogravimetric analyses (tGA). the generation of singlet oxygen by nanomaterials was also investigated. In the presence of UVA light exposure (365 nm) and 15 mM H 2 o 2 , the M@Fe(III)Pc photocatalyst gave the best results; for a catalyst concentration of 2.0 g L − 1 , around 60% BPA was removed after 120 min of reaction. These experimental conditions were further tested under natural solar light exposure, for which also M@fe(iii)pc exhibited enhanced oxidative catalytic activity, being able to remove 83% of BPA in solution. The water samples were less cytotoxic after treatment, this being confirmed by the MCF-7 cell viability assay. Emerging recalcitrant organic pollutants received extensive attention over the years, since they are difficult to remove using conventional technologies. Continuous efforts are made to find improved solutions for fighting against and for diminishing environmental pollution. Endocrine disruptive chemicals (EDC) are a class of hazardous persistent pollutants exhibiting numerous harmful effects, able to induce subtle and irreversible changes in living organisms, even in concentrations of few parts per billion 1,2. Bisphenol A (BPA) is an EDC that remains a major water contaminant, since its production in the 1950s. Since then, BPA become a well-established model compound for persistent micropollutants. Although found in low concentration in water, its removal proved to be unsuccessful using conventional water treatment approaches, such as chlorination and ozonation, processes that also exhibit several drawbacks 3. Promising alternatives, such as photocatalysis 1,4-6 , were found to be very efficient and versatile. For instance, photocatalysis involving dye-sensitization represents an eco-friendly approach with great potential for very efficient removal of persistent hazardous pollutants from waters. Singlet oxygen, a reactive oxygen species (ROS), has proved to be an extremely effective agent in the oxidation of emerging pollutants, due to its high oxidation ability. Organic phthalocyanines (Pcs) are the synthetic analogues of natural porphyrine compounds 7. Discovered in 1928, Pcs, possessing a two-dimensional geometry and a ring system consisting of 18 π-electrons, are composed of four isindole units linked by nitrogen atoms. Due to the large, aromatic, macrocyclic structure of Pc, a variety of metals (Me), such as Fe 8-10 , Zn 11,12 , Cu 13,14 , Mn, Co, Ni 15,16 , Si 17 , Ru 18 , can be bonded inside the cycle of Pc, substituting the two hydrogen atoms. These ...

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Section: Kinetics Of Bpa Photodegradation and Cytotoxicity Of The Sammentioning

confidence: 85%

Iron phthalocyanine-sensitized magnetic catalysts for BPA photodegradation

Neamţu

Nădejde

Brinza

et al. 2020

Sci Rep

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“…The signals observed at 807, 739, and 657 cm −1 can be assigned to Ti-O-Ti-O vibrations [49]. For pure g-CN, the peaks located from 1658 to 1236 cm −1 correspond to the stretching modes of the carbon-nitrogen (C=N and C-N) bonds, while the sharp peak located at 806 cm −1 can be attributed to the out-of-plane breathing vibration of the s-triazine units [15,16,50]. The broad absorption bands at 3235 and 3154 cm −1 correspond to the stretching modes of NH 2 and NH functions.…”

Section: Photocatalysts Synthesis and Characterizationmentioning

confidence: 99%

“…As previously observed after the pyrolysis of MIL-125(Ti) at a relatively mild temperature, the pure anatase phase of TiO2 is formed (Figure 4 . For g-CN, the diffraction peaks located at 13.03° and 27.51° are related to the (100) interplanar structural packing (repeated s-triazine units) and to the (002) interlayer stacking structure [15,16]. Compared to bulk g-CN, a slight decrease of the cristallite size from 7.4 to 6.9 nm ( Figure S3) and a slight shift to higher angles of the (002) peak ( Figure S4) were observed for exfoliated g-CN.…”

Section: Photocatalysts Synthesis and Characterizationmentioning

confidence: 99%

“…However, the conduction band of g-CN is located at ca. −1.3 eV at pH 7 vs. NHE and is more negative than that of TiO 2 [15,16], which allows photogenerated electrons to be efficiently transferred from the conduction band of g-CN to the conduction band of TiO 2 . This decrease of the photogenerated electron-hole pair's recombination allows significant improvements in the photocatalytic performance of g-CN/TiO 2 composites.…”

Section: Introductionmentioning

confidence: 99%

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Heterostructured g-CN/TiO2 Photocatalysts Prepared by Thermolysis of g-CN/MIL-125(Ti) Composites for Efficient Pollutant Degradation and Hydrogen Production

et al. 2020

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Photocatalysts composed of graphitic carbon nitride (g-CN) and TiO2 were efficiently prepared by thermolysis of the MIL-125(Ti) metal organic framework deposited on g-CN. The heterojunction between the 12 nm-sized TiO2 nanoparticles and g-CN was well established and the highest photocatalytic activity was observed for the g-CN/TiO2 (3:1) material. The g-CN/TiO2 (3:1) composite exhibits high visible light performances both for the degradation of pollutants like the Orange II dye or tetracycline but also for the production of hydrogen (hydrogen evolution rate (HER) up to 1330 μmolh−1g−1 and apparent quantum yield of 0.22% using NiS as a cocatalyst). The improved visible light performances originate from the high specific surface area of the photocatalyst (86 m2g−1) and from the efficient charge carriers separation as demonstrated by photoluminescence, photocurrent measurements, and electrochemical impedance spectroscopy. The synthetic process developed in this work is based on the thermal decomposition of metal organic framework deposited on a graphitic material and holds huge promise for the preparation of porous heterostructured photocatalysts.

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“…One of the methods to enhance visible-light absorption is to adhere inorganic semiconductors with narrow-band-gap materials such as nanoparticles or quantum dots (QDs) on the surface of wide-band-gap semiconductors, as a sensitizer [11] [12] [13]. Another way is to manipulate the band gap sufficiently to obtain a visible light spectrum response of 1.7 -2.9 eV by doping impurities such as carbon, nitrogen, or hydrogen [14] [15].…”

Section: Introductionmentioning

confidence: 99%

Heterojunction Photoelectrode of Polyaniline/ZnS Film/ZnO Nanorod on FTO Glass

Kim¹,

Yang²

2019

MSA

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Results of publication (only one response allowed): X are still valid.  were found to be overall invalid. Author's conduct (only one response allowed):  honest error  academic misconduct X none (not applicable in this case-e.g. in case of editorial reasons) * Also called duplicate or repetitive publication. Definition: "Publishing or attempting to publish substantially the same work more than once." History Expression of Concern:  yes, date: yyyy-mm-dd X no Correction:  yes, date: yyyy-mm-dd X no Comment: This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. Aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.

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Copper octacarboxyphthalocyanine as sensitizer of graphitic carbon nitride for efficient dye degradation under visible light irradiation

Cited by 35 publications

References 53 publications

Iron phthalocyanine-sensitized magnetic catalysts for BPA photodegradation

Iron phthalocyanine-sensitized magnetic catalysts for BPA photodegradation

Heterostructured g-CN/TiO2 Photocatalysts Prepared by Thermolysis of g-CN/MIL-125(Ti) Composites for Efficient Pollutant Degradation and Hydrogen Production

Heterojunction Photoelectrode of Polyaniline/ZnS Film/ZnO Nanorod on FTO Glass

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