Sensitization of magnetic TiO2 with copper(II) tetrahydroxylphenyl porphyrin for photodegradation of methylene blue by visible LED light

Gholamrezapor, Ensieh; Eslami, Abbas

doi:10.1007/s10854-019-00764-9

Cited by 10 publications

(5 citation statements)

References 45 publications

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“…The photocatalytic degradation of MB dye was used to assess the photocatalytic activity of Sn(IV) porphyrin-based nano-aggregates under visible light irradiation [ 51 , 52 , 53 , 54 ]. A negligible decomposition of MB dye is noticed in the absence of either any photo-catalyst or visible light irradiation.…”

Section: Resultsmentioning

confidence: 99%

Supramolecular Porphyrin Nanostructures Based on Coordination-Driven Self-Assembly and Their Visible Light Catalytic Degradation of Methylene Blue Dye

Shee

Kim

2020

Nanomaterials

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A series of porphyrin triads (1–4), in which each triad is composed of a Sn(IV) porphyrin and two free-base (or Zn(II)) porphyrins, was synthesized and their self-assembled nanostructures were studied. Depending on the substituent on porphyrin moieties, each triad was self-assembled into a different nanostructure. In particular, the cooperative coordination of 3-pyridyl groups in the Sn(IV) porphyrin with the axial Zn(II) porphyrins in triad 4 leads to forming uniform nanofibers with an average width of 10–22 nm. Other triads without the coordinating interaction between the central Sn(IV) porphyrin and the axial porphyrins formed irregularly shaped aggregates in contrast. The morphologies of nanofiber changed drastically upon the addition of pyrrolidine, in which pyrrolidine molecules break down the self-assembly process by coordinating with the axial Zn(II) porphyrins. All porphyrin aggregates exhibited efficient photocatalytic performances on the degradation of methylene blue dye under visible light irradiation. The degradation efficiencies after 2 h were observed to be between 70% and 95% for the aggregates derived from the four triads.

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Section: Resultsmentioning

confidence: 99%

Supramolecular Porphyrin Nanostructures Based on Coordination-Driven Self-Assembly and Their Visible Light Catalytic Degradation of Methylene Blue Dye

Shee

Kim

2020

Nanomaterials

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“…Decomposing dyes under the influence of light, catalyzed by porphyrin-hybrid materials, represents a different method to purify wastewaters. For example, Cu(II)-5,10,15,20-tetrakis(4-(hydroxyl)phenyl) porphyrin assembled into a magnetic photocatalyst (magnetite-silica hybrid) was able to degrade MB under blue LED light, (λ = 465 nm) with 98% efficiency [24]. Another metalloporphyrin, Cu(II)-meso-tetra-(4-carboxyphenyl)-porphyrin [25], acts as photocatalyst for the degradation of MB under visible light irradiation (yield of 59.3%).…”

Section: Introductionmentioning

confidence: 99%

Hybrid Materials Based on Silica Matrices Impregnated with Pt-Porphyrin or PtNPs Destined for CO2 Gas Detection or for Wastewaters Color Removal

Anghel

Lascu

Epuran

et al. 2020

IJMS

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Multifunctional hybrid materials with applications in gas sensing or dye removal from wastewaters were obtained by incorporation into silica matrices of either Pt(II)-5,10,15,20-tetra-(4-allyloxy-phenyl)-porphyrin (PtTAOPP) or platinum nanoparticles (PtNPs) alone or accompanied by 5,10,15,20-tetra-(4-allyloxy-phenyl)-porphyrin (TAOPP). The tetraethylorthosilicate (TEOS)-based silica matrices were obtained by using the sol-gel method performed in two step acid-base catalysis. Optical, structural and morphological properties of the hybrid materials were determined and compared by UV-vis, fluorescence and FT-IR spectroscopy techniques, by atomic force microscopy (AFM) and high resolution transmission electron microscopy (HRTEM) and by Brunauer–Emmett–Teller (BET) analysis. PtTAOPP-silica hybrid was the most efficient material both for CO2 adsorption (0.025 mol/g) and for methylene blue adsorption (7.26 mg/g) from wastewaters. These results were expected due to both the ink-bottle mesopores having large necks that exist in this hybrid material and to the presence of the porphyrin moiety that facilitates chemical interactions with either CO2 gas or the dye molecule. Kinetic studies concerning the mechanism of dye adsorption demonstrated a second order kinetic model, thus it might be attributed to both physical and chemical processes.

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“…In addition to that the floating photocatalysts have high possibility to expose themselves to the irradiated light, large surface area for making a contact with dye molecules, high interaction with oxygen gas, and consequently an enhanced photocatalytic performance is achievable [32,33]. Moreover, silica has been used as a supporting material for dye degradation under illumination of visible light with limited performances [34][35][36]. Of particular interest to the current study, we found that the reported floating photocatalysts do not have disinfectant activity to kill the pathogens during the degradation of dyes in wastewater, thus the treated water will require an additional chemical or disinfectant agent to kill the pathogens.…”

Section: Introductionmentioning

confidence: 99%

Renewable and eco-friendly ZnO immobilized onto dead sea sponge floating materials with dual practical aspects for enhanced photocatalysis and disinfection applications

Bhatti¹,

Almani²,

Shah³

et al. 2022

Nanotechnology

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In this study, we have investigated the role of natural Dead Sea Sponge (DSS, Porifera) as a three- dimensional (3D) porous host substrate for the immobilization of nanostructured ZnO towards the development of floating photocatalysts for efficient removal of methylene blue (MB) dye under the illumination of sunlight. Since the treated water after dye degradation contains several pathogens, different disinfectants or chemical reagents are essentially used. This is not the case for DSS as it can naturally kill any pathogens during the wastewater treatment process. To explore these functions, ZnO nanosheets were incorporated onto DSS via hydrothermal protocol and the as prepared ZnO/DSS hybrid material exhibited ~100% degradation efficiency for the removal of MB. Importantly, the degradation kinetics associated with the fabricated ZnO/DSS was remarkably accelerated as evidenced by the high values of degradation reaction rate constants (3.35×10-2 min-1). The outperformance of ZnO/DSS could be attributed to the high rate of adsorption caused by its 3D porous structure together with the rapid oxidation of MB facilitated by the presence of silica (SiO2) within the composition, which acts as semiconducting photosensitive material. Furthermore, the high charge separation of electron-hole pairs, natural porosity, and abundant catalytic sites offered by the hybrid ZnO/DSS floating photocatalyst SiO2 play a major role in achieving ~100% degradation efficiency for MB. Finally, the excellent reusability results confirm the feasibility of using natural ZnO/DSS-based photocatalyst for practical solution of wastewater treatment and other environmental problems.

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Sensitization of magnetic TiO2 with copper(II) tetrahydroxylphenyl porphyrin for photodegradation of methylene blue by visible LED light

Cited by 10 publications

References 45 publications

Supramolecular Porphyrin Nanostructures Based on Coordination-Driven Self-Assembly and Their Visible Light Catalytic Degradation of Methylene Blue Dye

Supramolecular Porphyrin Nanostructures Based on Coordination-Driven Self-Assembly and Their Visible Light Catalytic Degradation of Methylene Blue Dye

Hybrid Materials Based on Silica Matrices Impregnated with Pt-Porphyrin or PtNPs Destined for CO2 Gas Detection or for Wastewaters Color Removal

Renewable and eco-friendly ZnO immobilized onto dead sea sponge floating materials with dual practical aspects for enhanced photocatalysis and disinfection applications

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