Photocatalytic degradation of dyes using phosphorus-containing activated carbons

Sydorchuk, V.; Poddubnaya, O.I.; Tsyba, M.M.; Zakutevskyy, O. I.; Khyzhun, O.Y.; Khalameida, S.; Puziy, Alexander M.

doi:10.1016/j.apsusc.2020.147667

Cited by 39 publications

(9 citation statements)

References 59 publications

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“…The deconvoluted O 1s spectrum shows a peak at 531.14 eV arising from a phosphorus-oxygen bond (Figure S20, Supporting Information). [22] The small shift in the peak positions remained the same as of original results, that is, due to the electron redistribution by defects, nitrogen doping, and the enhancement of electronic structure by Ni. Overall, these results strongly demonstrate that the catalyst's composition, surface, structure, and morphology remain intact, indicating its exceptional stability and performance in carrying out direct seawater catalysis.…”

Section: Resultssupporting

confidence: 72%

“…[ 15,16 ] The deconvoluted O 1s spectrum of phosphide has peaks at 531.14 and 532.3 eV resulting from the phosphorus‐oxygen bond (phosphate) and atmospheric adsorbed oxygen (Figure S8a, Supporting Information). [ 22 ] It is worth noting that a slight shift in the position of the peaks could be due to a redistribution of electrons created by defects, nitrogen doping, and the electronic structure's enhancement due to the synergistic effect between Ni and Mo in both systems. Hence, XPS results confirmed that Ni and N doping helps to tune the energy state of Mo as well as confirm the presence of surface phosphate and nitrates, which collectively tune the surface for efficient water catalysis and protection from corrosive chlorine chemistry.…”

Section: Resultsmentioning

confidence: 99%

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Nitrogen‐Doped Porous Nickel Molybdenum Phosphide Sheets for Efficient Seawater Splitting

Loomba

Khan

Haris

et al. 2023

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Hydrogen is emerging as an alternative clean fuel; however, its dependency on freshwater will be a threat to a sustainable environment. Seawater, an unlimited source, can be an alternative, but its salt‐rich nature causes corrosion and introduces several competing reactions, hindering its use. To overcome these, a unique catalyst composed of porous sheets of nitrogen‐doped NiMo3P (N‐NiMo3P) having a sheet size of several microns is designed. The presence of large homogenous pores in the basal plane of these sheets makes them catalytically more active and ensures faster mass transfer. The introduction of N and Ni into MoP significantly tunes the electronic density of Mo, surface chemistry, and metal‐non‐metal bond lengths, optimizing surface energies, creating new active sites, and increasing electrical conductivity. The presence of metal‐nitrogen bonds and surface polyanions increases the stability and improves anti‐corrosive properties against chlorine chemistry. Ultimately, the N‐NiMo3P sheets show remarkable performance as it only requires overpotentials of 23 and 35 mV for hydrogen evolution reaction, and it catalyzes full water splitting at 1.52 and 1.55 V to achieve 10 mA cm−2 in 1 m KOH and seawater, respectively. Hence, structural and compositional control can make catalysts effective in realizing low‐cost hydrogen directly from seawater.

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Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Nitrogen‐Doped Porous Nickel Molybdenum Phosphide Sheets for Efficient Seawater Splitting

Loomba

Khan

Haris

et al. 2023

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“…The XP spectra of the AC support show typical asymmetric peaks in the C 1s region (Figure A). The main peak at 284.5 eV is assigned for aromatic C–C/C–H bonds (sp 2 -hybridized carbon) and attributed to graphitic carbon. , The peak at 285.4 eV is variously assigned to sp 3 -hybridized carbon and defective carbon structures; it indicates some amorphous carbon on the surface . The following C 1s components such as C–O (286.4 eV), CO (287.9 eV), and π–π* satellite bonds (290.2 eV) , are also found.…”

Section: Results and Discussionmentioning

confidence: 99%

Carbon-Supported Mg–Al Oxide Hybrid Catalysts for Aqueous Ethanol Conversion into 1-Butanol in a Flow Reactor

Larina

Kyriienko

Shcherban

et al. 2021

Ind. Eng. Chem. Res.

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Carbon-supported Mg–Al oxide (hydrotalcite-derived) hybrid catalysts for aqueous ethanol conversion into 1-butanol were prepared and characterized by X-ray diffraction, scanning electron microscopy, low-temperature nitrogen ad(de)sorption, Fourier transform infrared and X-ray photoelectron spectroscopies, and temperature-programmed desorption of NH3, CO2, and H2O. Enhanced catalytic activity and stability of operation over time on stream of the hybrid catalysts versus Mg–Al oxides were achieved using both rectified and aqueous ethanol as feed. Redistribution of the active sites of the Mg–Al oxide phase over a highly dispersed support and increasing their availability for the reagents were suggested to be the causes of the enhanced activity of the hybrid catalysts.

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“…Under irradiation, photocatalysts are excited by jumping electrons to a higher energy level and creating a hole with positive charge. The photo excited electron-holes have the potential of initiating redox reactions (Sydorchuk et al 2021; Aziz et al 2021). One of the most important surface reactions is the formation of hydroxyl radicals from oxidation of H 2 O molecule by photocatalysts (Maleki and Ashraf Talesh 2021; Vasiljevic et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Activated carbon/ZnO-Ni nanoflower composite as an efficient photocatalyst for enhanced degradation of reactive red 120 dye under LED light

Norozi

Mansouri

Karamian

et al. 2023

Preprint

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In this research, ZnO doped Ni was immobilized over activated carbon nanoparticles, and the prepared photocatalysts were characterized by FTIR, XRD, SEM, EDS, and BET analyses and used for the degradation of reactive red 120 (RR120) dye under LED light irradiation. The C/ZnO-Ni photocatalyst demonstrated a flower-like morphology with mesoporous features. The effect of the main parameters like Zn:Ni molar ratio, photocatalyst amount, carbon mesh size, solution pH, initial RR120 concentration, H2O2 and power of LED lamp was investigated to maximize the efficiency of RR120 degradation. The best photocatalytic RR120 degradation of 94.88% was observed under the optimum conditions in which Zn:Ni molar ratio, photocatalyst amount, carbon mesh size, solution pH, initial RR120 concentration, H2O2 and power of LED lamp were adjusted at 1:2, 50 mg, 270, 3, 5 ppm, 0.2 mL and 50 W, respectively. Kinetic studies confirmed the applicability of the Langmuir-Hinshelwood theory by which the dye concentration is a first-order function of time. The reusability study of the C/ZnO-Ni photocatalyst showed good stability of the photocatalyst after recycling 7 times under the optimum conditions.

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Photocatalytic degradation of dyes using phosphorus-containing activated carbons

Cited by 39 publications

References 59 publications

Nitrogen‐Doped Porous Nickel Molybdenum Phosphide Sheets for Efficient Seawater Splitting

Nitrogen‐Doped Porous Nickel Molybdenum Phosphide Sheets for Efficient Seawater Splitting

Carbon-Supported Mg–Al Oxide Hybrid Catalysts for Aqueous Ethanol Conversion into 1-Butanol in a Flow Reactor

Activated carbon/ZnO-Ni nanoflower composite as an efficient photocatalyst for enhanced degradation of reactive red 120 dye under LED light

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