Enhanced removal of azo dye using modified PAN nanofibrous membrane Fe complexes with adsorption/visible-driven photocatalysis bifunctional roles

Electrospun nanofiber substrates that enhance polar solvent separation from organic compounds in thin-film composites

“…The new broad absorption peak in the 1665-1630 cm -1 region is for the stretching vibrations of C=N and N-N bands and the 1200 -1310 cm −1 peaks are assigned to the mixed C-N stretching and N-H bending vibrations, which are broadened due to the conjugation effect, confirming the predominant formation of cyclic nitrogen-containing structures. 34,38,39 This indicated the transformation of linear C≡N functional groups into cyclic, nitrogen-containing structures (cross-linking) or hydrazides (branching) as shown in Scheme 1. 40 The cross-linking duration drastically impacted on the mechanical properties of PAN nanofibrous substrates (Fig.…”

Comparison of four oxidants activated through tetraacetylethylenediamine for developing sustainable and rapid degradation of organic dye

“…1,2 This has posed an increasingly serious problem for both the natural environment and human health due to their non-biodegradability and significant mutagenic and carcinogenic effects. 3,4 Although many techniques have been proposed to remove or decompose organic dyes from wastewater, several oxidative degradation processes using different oxidising agents such as hydrogen peroxide, [5][6][7][8] hypochlorite, 9,10 peroxysulphates [11][12][13] and ozone 14,15 have been found to be more effective than the other methods, mainly because the organic dyes can be broken down and completely mineralised to carbon dioxide and water by the oxidants under optimal conditions. However, most of these technologies are often more time-or energy-consuming, require a complicated and high-cost process, or produce secondary pollution, which is often a result of using iron compounds as photocatalysts under light irradiation, particular in photo-Fonten reactions.…”

Preparation of Sulfonated Poly(arylene ether nitrile)-Based Adsorbent as a Highly Selective and Efficient Adsorbent for Cationic Dyes

“…Therefore, simple and effective dye treatment methods are in great demand to relieve environmental pressure. Numerous methods including ion exchange [6], membrane filtration [7], chemical coagulation/flocculation [8], microbial degradation [9], catalytic reduction [10], etc., have been developed for the treatment of dye-contaminated wastewater. However, these methods always suffer from high cost, complicated operation and generation of potential toxic byproduct [11].…”