Highly dispersed and stable nano zero-valent iron doped electrospun carbon nanofiber composite for aqueous hexavalent chromium removal

Niu, Qijian; Liu, Meili; Fang, Longyang; Yu, Yangyang; Cheng, Liang; You, Tianyan

doi:10.1039/d2ra00193d

Cited by 8 publications

(1 citation statement)

References 43 publications

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“…Inorganic chromium compounds are widely used in various industries such as electroplating, leather and dye manufacturing, metal processing, etc. [15,16] Chromium occurs mostly in two forms: hexavalent and trivalent chromium (Cr(VI) and Cr(III)). The former is much more soluble (hence, mobile) and poisonous (carcinogenic) than the latter form.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ruthenium Modification of g-C3N4 in the Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

et al. 2023

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Graphitic carbon nitride (g-C3N4) is a promising heterogeneous photocatalyst in the visible range. It can be used, among others, for reductive conversion of the toxic hexavalent chromium occurring in various wastewaters. Its photocatalytic efficiency, however, has to be improved, which can be realized by modification with different dopants or co-catalysts forming heterojunctions. In our work, ruthenium-modified g-C3N4 has been prepared by ultrasonic impregnation of the pristine g-C3N4, which was synthesized from thiourea. The morphology, microstructure, and optical properties of the photocatalysts were characterized by XRD, SEM, FT-IR, TEM, XPS, and DRS. Their compositions were analyzed by EDS and XPS measurements, indicating 0.5% and 1.4% Ru, due to the different penetrating depths. XPS study showed mainly +2 for the oxidation state of Ru. DRS analysis indicated a slight change in both the CB (from −1.14 to −1.22 eV) and the VB (from 1.49 to 1.56 eV) energies of Ru/g-C3N4, compared to those of g-C3N4. The photocatalytic Cr(VI) reduction efficacy increased from 50.1 to 96.8%. Low pH (=2) was preferred for the photocatalytic Cr(VI) reduction due to the favorable surface charge and E(Cr(VI)/Cr(III)) redox potential. Ru modification proved to be promising for improving the photocatalytic performance of g-C3N4.

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Section: Introductionmentioning

confidence: 99%

Effect of Ruthenium Modification of g-C3N4 in the Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

et al. 2023

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Zeolite-PAN/PVDF composite nanofiber membranes for highly efficient and selective removal of cationic dyes from wastewater

Arif,

Muhtar,

Siburian

et al. 2024

Case Studies in Chemical and Environmental Engineering

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In situ carbothermal synthesis of carbonized bacterial cellulose embedded with nano zero-valent iron for removal of Cr(VI)

Ma,

Wang,

Zhu

et al. 2024

International Journal of Biological Macromolecules

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Highly dispersed and stable nano zero-valent iron doped electrospun carbon nanofiber composite for aqueous hexavalent chromium removal

Abstract: Improving the dispersion and stability of nano zero-valent iron (nZVI) is very important for its practical application.

Cited by 8 publications

References 43 publications

Effect of Ruthenium Modification of g-C3N4 in the Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

Effect of Ruthenium Modification of g-C3N4 in the Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

Zeolite-PAN/PVDF composite nanofiber membranes for highly efficient and selective removal of cationic dyes from wastewater

In situ carbothermal synthesis of carbonized bacterial cellulose embedded with nano zero-valent iron for removal of Cr(VI)

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