Ag 2 O and Fe 2 O 3 modified oxides on the photocatalytic treatment of pulp and paper wastewater

Marques, Rubiane Ganascim; Ferrari, Ana Maria; Santana, Veronice Slusarski; Fernandes-Machado, Nádia Regina Camargo

doi:10.1016/j.jenvman.2016.08.034

Cited by 39 publications

(12 citation statements)

References 29 publications

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“…This technique is complementary to the conventional approaches of waste water treatment such as filtration and sedimentation [1]. Wide band-gap semiconductors such as TiO 2 , ZnO, SnO 2 , WO 3 , Fe 2 O 3 , CdS and NiO are some of the most actively investigated systems as photocatalysts for water purification [2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic activity of ZnO–NiO nanocomposites synthesized through a facile sonochemical route

et al. 2019

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Formation of heterostructures with p-type oxides such as NiO and CuO is one of the effective methods for improving the photocatalytic performance of ZnO. Such systems are often synthesized through template-based growth techniques that involve many steps. We have prepared ZnO-NiO composites through a facile, template-free, low-temperature sonochemical route. High-resolution transmission electron microscopy analysis indicates the formation of ZnO-NiO heterostructures. Photocatalytic activity of ZnO-NiO nanocomposites in the decomposition of methylene blue dye under solar irradiation is found to be much larger than that of both pure ZnO (1.26 × 10 −2 min −1 ) and NiO (0.31 × 10 −2 min −1 ) establishing synergistic effects. The rate constant increases with increase in the percentage of NiO in the composite and is 6.00 × 10 −2 min −1 for sample with the highest percentage of NiO. Rate constants for the second and third runs are estimated to be 4.4 × 10 −2 and 4.2 × 10 −2 min −1 which are promising. The main mechanism of enhancement of photocatalytic activity of the composites is identified as the more effective separation of the photogenerated free charge carries due to the internal electric field at the ZnO-NiO interface. Sharp decrease in the relative intensity of the band-band emission of ZnO at ~ 380 nm in the case of composite samples and analysis of the relative position of the conduction band and valence band edges of ZnO and NiO support the proposed mechanism.

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Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic activity of ZnO–NiO nanocomposites synthesized through a facile sonochemical route

et al. 2019

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“…In addition, according to the literature, the E VB and E CB of Ag 2 O were 1.44 eV and 0.14 eV, respectively. 17…”

Section: Uv-vis Drsmentioning

confidence: 99%

Facile fabrication of hierarchical p-Ag₂O/n-Nb₂O₅ heterojunction microspheres with enhanced visible-light photocatalytic activity

Wang

Han

et al. 2020

RSC Adv.

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“…7,8 In this regard, many promising methods including metal and nonmetal doping, noble metal deposition or compositing with other semiconductor have been developed to improve the efficiency of Nb 2 O 5 as a photocatalytic material. [9][10][11][12][13][14][15] It has been proved that metal element doping was one of the most effective approaches to extend the spectral response of the wide-bandgap semiconductor to visible-light region. [16][17][18] Recently, some metal elements such as W, Mo, Fe, Cu and Mn have been employed to tune the electronic structure and enhanced the photocatalytic activity of the semiconductor photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of Fe-doped Nb₂O₅ nanofibers by an electrospinning process and their application in photocatalysis

Wang

Han

et al. 2021

RSC Adv.

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Ag 2 O and Fe 2 O 3 modified oxides on the photocatalytic treatment of pulp and paper wastewater

Cited by 39 publications

References 29 publications

Enhanced photocatalytic activity of ZnO–NiO nanocomposites synthesized through a facile sonochemical route

Enhanced photocatalytic activity of ZnO–NiO nanocomposites synthesized through a facile sonochemical route

Facile fabrication of hierarchical p-Ag₂O/n-Nb₂O₅ heterojunction microspheres with enhanced visible-light photocatalytic activity

Facile fabrication of Fe-doped Nb₂O₅ nanofibers by an electrospinning process and their application in photocatalysis

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Ag 2 O and Fe 2 O 3 modified oxides on the photocatalytic treatment of pulp and paper wastewater

Cited by 39 publications

References 29 publications

Enhanced photocatalytic activity of ZnO–NiO nanocomposites synthesized through a facile sonochemical route

Enhanced photocatalytic activity of ZnO–NiO nanocomposites synthesized through a facile sonochemical route

Facile fabrication of hierarchical p-Ag2O/n-Nb2O5 heterojunction microspheres with enhanced visible-light photocatalytic activity

Facile fabrication of Fe-doped Nb2O5 nanofibers by an electrospinning process and their application in photocatalysis

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Product

Resources

About

Facile fabrication of hierarchical p-Ag₂O/n-Nb₂O₅ heterojunction microspheres with enhanced visible-light photocatalytic activity

Facile fabrication of Fe-doped Nb₂O₅ nanofibers by an electrospinning process and their application in photocatalysis