Enhanced photo-reduction of chromium(VI) from aqueous solution by nanosheet hybrids of covalent organic framework and graphene-phase carbon nitride

A novel covalent organic framework for efficient photocatalytic reduction of Cr(vi) and synergistic removal of organic pollutants under visible light irradiation

“…On the other hand, e − can reduce O 2 in the system to ·O 2 − ( E θ (O 2 /·O 2 − ) = −0.33 V), which further accelerated the photocatalytic reduction of Cr( vi ). 45,55,56 Besides, h + was presumably consumed by organic pollutants, which promoted the effective separation of e − –h + and inhibited the reoxidation of Cr( iii ). Consequently, the photocatalytic reduction of Cr( vi ) by HDU-26 exhibited excellent performance with the addition of RhB, MB or MO.…”

Recent advances in metal-free covalent organic frameworks for photocatalytic applications in energy and environmental fields

“…Zhai et al 114 reported the in situ growth of COF-CNNS hybrid materials based on porous C 3 N 4 nanosheets (CNNS). Comparing metal hybrids of COFs to the prepared COF-CNNS revealed that they conform to the CHON principle.…”

Porous organic polymers as a promising platform for efficient capture of heavy metal pollutants in wastewater

“…Dynamic photocatalytic tests show that when the COF-CNNS hybrid is packed into a column, the photocatalytic removal ratio of Cr(VI) could be maintained at around 80%, proving the good applicability of this material in Cr(VI) removal. 167 Through the condensation of hexachlorocyclotriphosphazene, trithiocyanuric acid, and Ni 0.…”