Effective photodegradation of organic pollutantsin the presence of mono and bi-metallic complexes under visible-light irradiation

Subburu, Mahesh; Gade, Ramesh; Guguloth, Venkanna; Chetti, Prabhakar; Ravulapelly, Koteshwar Rao; Pola, Someshwar

doi:10.1016/j.jphotochem.2020.112996

Cited by 11 publications

(5 citation statements)

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“…The photocatalyst (30 mg) was placed into 80 mL dye pollutant solution (5 × 10 −4 M) in a 100 mL quartz glass cylindrical photoreactor. The mineralization of MR and MV cationic dyes was kept in the presence of visible light (300 Watts tungsten light with photon flux 8.02 × 10 13 Einstein/s and wavelength 380-780 nm), as found by utilizing the chemical actinometric method with Reinecke salt [18] for 30 min. The adsorption-desorption equilibrium technique for the specific dye was attained in the absence of light for 10 min; the light was then permitted to fall on the reaction dye solution.…”

Section: Experimental Procedures For Photomineralization Of Dye Pollu...mentioning

confidence: 99%

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Synthesis and Characterization of New Tetradentate N2O2-Based Schiff’s Base Cu (II) Complexes for Dye Photodegradation

Vallavoju,

Kore,

Parikirala

et al. 2023

Photochem

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We have reported tetradentate ligands (salophen) coordinated with N and O atoms that led to the Cu (II) complexes. These Cu (II) complexes (C-1 and C-2) were firstly established by using elemental analysis and confirmed by mass spectra. At the same time, the characterization of C-1 and C-2 complexes is performed by using several spectroscopic methods and morphological analysis. The bandgap values of the C-1 and C-2 complexes are evaluated with UV-vis DRS spectra. The PL spectral data and photocurrent curves clearly indicated the small recombination rate of the hole–electron pair. The synthesized C-1 and C-2 complexes’ photocatalytic properties were examined for the degradation of cationic dyes such as methylene blue (MB λmax.= 654 nm) and methyl violet (MV λmax.= 590 nm) below visible-light action. The C-2 complex is more active than the C-1 complex because of its high photostability, small band-gap energy, and low recombination rate for hole–electron pair separation, and improved visible-light character, which encourages the generation of hydroxyl radical species throughout the photodegradation process. Scavenger probes were used to identify the dynamic species for the photodegradation of dyes, and a mechanism investigation was established.

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Section: Experimental Procedures For Photomineralization Of Dye Pollu...mentioning

confidence: 99%

“…Under visible-light irradiation, mono-and bimetallic complexes have been used to photodegrade organic pollutants [18]. Photooxidation of aromatic hydrocarbons and methylstyrenes have also been accomplished using Ru (II) and Zn (II) complexes with Schiff base ligands [19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of New Tetradentate N2O2-Based Schiff’s Base Cu (II) Complexes for Dye Photodegradation

Vallavoju,

Kore,

Parikirala

et al. 2023

Photochem

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“…(αhν) = A(Eg − hν) 2 where A is a constant, h is Planck's constant and ν is the frequency of the incident light [40]. The E g of the complexes [Zn(CPAMN)], [Zn(FPAMN)], and [Zn(MPAMN)] was 2.18, 2.15, and 2.24 eV, respectively, which was much smaller than that of standard ZnO (3.9 eV), indicating that the energy band structure of the complexes has been modified.…”

Section: Absorption and Emission Studiesmentioning

confidence: 99%

Photooxidation of 2,2′-(Ethyne-1,2-diyl)dianilines: An Enhanced Photocatalytic Properties of New Salophen-Based Zn(II) Complexes

et al. 2022

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Under solvothermal conditions, the Zn(II) complexes formed from salophen-based ligands with N and O donor atoms are reported. These Zn(II) complexes were initially confirmed through elemental analysis and supported by mass spectral data. The purity of the ligands and Zn(II) complexes was confirmed by using NMR spectral studies. The functional group complexation was established by FT-IR analysis. Additional supportive information about the complexes is also reported through molar conductance and thermal studies. The bandgap energies of the ligands and Zn(II) complexes are estimated with UV-visible DRS studies. The rate of recombination of hole–electron pairs is directly related to photocatalytic activity, which is confirmed by using emission spectral analysis. The surface metaphors for ligands and complexes are obtained from FESEM analysis. These new sequences of Zn(II) complexes were used for the photooxidation of 2,2′-(ethyne-1,2-diyl)dianiline and its derivatives. Mechanistic studies on the fast degradation of dyes were supported in the presence of several scavengers. The rapid photooxidation process in the presence of [Zn(CPAMN)] has been demonstrated, and a highly efficient photocatalyst for the photooxidation of 2,2′-(ethyne-1,2-diyl) dianiline has been proposed. Furthermore, the experimental findings are supported by the DFT studies.

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“…9,10 It is known that the photocatalytic efficacy of a specific type of photocatalyst is determined by the active species involved in processes like charge carrier transport, light absorption, and photo-generated electron-hole pair recombination. 11,12 Ternary metal oxides are very promising compounds for various applications, such as in photocatalysis, photovoltaic cells, photo-electrochromic displays, light-emitting devices, and sensors. 13,14 Ternary metal oxides doped with Ag have been designed for applications in electron-transporting layers, perovskite solar cells, degradation of organic pollutants, and plasmonic sensors.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of titanates for photomineralization of industrial wastewater and organic pollutants

Gade

Manohar

Simhachalam

et al. 2022

Environ. Sci.: Water Res. Technol.

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Effective photodegradation of organic pollutantsin the presence of mono and bi-metallic complexes under visible-light irradiation

Cited by 11 publications

References 50 publications

Synthesis and Characterization of New Tetradentate N2O2-Based Schiff’s Base Cu (II) Complexes for Dye Photodegradation

Synthesis and Characterization of New Tetradentate N2O2-Based Schiff’s Base Cu (II) Complexes for Dye Photodegradation

Photooxidation of 2,2′-(Ethyne-1,2-diyl)dianilines: An Enhanced Photocatalytic Properties of New Salophen-Based Zn(II) Complexes

Synthesis of titanates for photomineralization of industrial wastewater and organic pollutants

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