Geochemical modelling of diethylenetriamine in tailings management areas

Simultaneous Efficient Photocatalytic Hydrogen Evolution and Degradation of Dye Wastewater without Cocatalysts and Sacrificial Agents Based on g‐C3N5 and Hybridized Ni‐MOF Derivative‐CdS‐DETA

“…[24] Reportedly, the free electron pairs on the nitrogen atoms in DETA (C4H13N3) can both bind with H + and attract metal ions (e.g., Ni 2+ ), so using DETA can be attempted to remove Ni 2+ from Ni-MOF. [25] Therefore, it is feasible to improve the photocatalytic activity of CdS by compositing the Ni 2+ -removed Ni-MOF derivative with CdS-DETA as a Ni-MOF derivative-CdS-DETA (abbreviated as MOF-CD). And this MOF-based composite photocatalyst does not contain cocatalysts.…”

“…Referring to the relevant literature and combining it with the experimental results (Ni-MOF derivatives do not contain Ni 2+ but still have Ni-MOF functional groups), the hybridized mechanism of the Ni-MOF derivative with CdS-DETA is speculated, as shown in Scheme 2a. Under high-pressure hydrothermal conditions, DETA is protonated to produce positively charged -NR 3 , [13] and DETA reacts with Ni 2+ in Ni-MOF to produce NiDETA 2+ and the Ni-MOF derivative, [25] and NiDETA 2+ is dissolved in a mixed solution of DETA and H 2 O. There is a weak attraction between the negatively charged Ni-MOF derivative and the positively charged Cd 2+ , and Cd 2+ attracts S 2− , while S 2− coordinates with the positively charged -NR 3 .…”