A magnetically recyclable photocatalyst with commendable dye degradation activity at ambient conditions

Abstract

An efficient, economical, environment-friendly and easy separable catalyst to treat environmental contaminants is an enduring attention in recent years due to their great potential for environmental protection and remediation. Here we have reported the excellent performance of polyaniline activated heterojunctured Ni0.5Zn0.5Fe2O4 catalyst to degrade azo dye in an aqueous solution at ambient condition. The catalyst was prepared via a simple facile polymerization procedure. The physicochemical properties and structure of the synthesized catalyst was confirmed by TGA, PXRD, FTIR, SEM, HRTEM, XPS, EDX, and DRS techniques. The developed catalyst has shown an accelerated degradation ability of an organic pollutant Orange ll Sodium salt azo dye about 100% for the dye concentration of 50 ppm within five minutes at ambient conditions with 1 g/l loading of catalyst. Simple facile synthesis, easy separation by an external magnet, good reusability and high degradation capability of the catalyst may promote the practical applications of the heterostructured catalyst at ambient condition for water remediation. The present study also explored possible credible charge transfer directions and mechanism of photocatalysis supported by trapping experiments and electrochemical impedance spectroscopy (EIS) measurement for the effective improvement of photocatalytic activity and enhancement of the visible light adsorption.

Biomass-derived Carbon Quantum Dots for Visible-Light-Induced Photocatalysis and Label-Free Detection of Fe(III) and Ascorbic acid

“…Discharge of chemically stable and non-biodegradable toxic organic dyes into aquatic environments is a growing problem because of their highly toxic nature 1,2 . Organic dyes can affect the oxygen dissolution, sunlight penetration, and transparency of water, and can also reduce photosynthesis in water bodies, even when present at very low concentrations (~10 ppm) 3,4 . In addition, some dyes are highly mutagenic and carcinogenic to living organisms, including humans 4 .…”

Performance enhancement of commercial ultrafiltration polysulfone membrane via in situ polymerization of aniline using copper chloride as a catalyst

“…The narrow‐scan spectra for the modified membrane are displayed in Fig 3. It is observed that the C 1s spectrum of the unmodified membrane had only a single type of peak, CC/CH at 283.7 eV, whereas the core C 1s level spectrum of the modified membrane could be deconvoluted into three satellite peaks: 283.3 eV (CC), 284.5 eV (CC or CH) and 286.09 eV (CN or CCOH) 57,63,64 . Further, the N 1s spectrum can be resolved into three peaks related to different forms of nitrogen that are present in polyaniline.…”

A Sharp Jump in Photocatalytic Activity of Elemental Sulfur for Dye Degradation in Alkaline Solution

“…Several methods were used to remove MV from water including photocatalytic reaction (31,32). Photocatalyst is a semiconductor substance that is activated when exposed with light irradiation, and it can participate in oxidation and reduction reactions (33)(34)(35). Recently, it has been reported that elemental ɑ-sulfur (S 8 ) can be used as photocatalyst for degradation of Rhodamin B (RhB) under visible light (36,37).…”