Network structure-based decorated CPA@CuO hybrid nanocomposite for methyl orange environmental remediation

Abstract

A unique network core–shell hybrid design-based cross-linked polyaniline (CPA), which was coated with CuO nanoparticles (NPs) and decorated with nitrogen-doped SWCNT/GO/cellulose N-SWCNTS-GO-CE, has been fabricated using the oxidative polymerization technique. This hybrid nanocomposite shows excellent photocatalytic degradation and an acceptable adsorption capability for Methyl Orange (MO) dye in aqueous solutions with a very slight effect for the N-SWCNTS-GO-CE CuO component. The prepared nanocomposites were used for the removal of a carcinogenic and noxious dye, Methyl Orange, from aqueous samples under various adsorption conditions. Approximately 100% degradation of 10 mg/L of Methylene orange dye was observed within 100 min at pH 6.0 using 50 mg/L CPA/N-SWCNTS-GO-CE/CuO nanocomposite under UV radiation. Additionally, significant factors were investigated on the degradation process including the contact time, MO initial concentration (Ci), solution pH, and dosage of the CuO nanocomposite. All investigated experiments were performed under UV radiation, which provided significant data for the MO degradation process. Furthermore, the recovery of the nanocomposite was studied based on the photocatalytic process efficiency. The obtained data provide the high opportunity of reusing CPA/N-SWCNTS-GO-CE/CuO nanocomposite for numerous photocatalytic processes. The CPA/N-SWCNTS-GO-CE/CuO nanocomposite was prepared via chemical oxidative copolymerization of polyaniline (PANI) with p-phenylenediamine (PPDA) and triphenylamine (TPA) in the presence of N-SWCNTS-GO-CE and CuO NPs. The morphology, structure and thermal properties of the CPA/N-SWCNTS-GO-CE/CuO nanocomposite were investigated using various techniques, including FTIR, XRD, RAMAN, SEM, MAP, EDX, TEM, TGA and DTG. Therefore, CPA/N-SWCNTS-GO-CE/CuO nanocomposite can be effectively used as a convenient and reusable adsorbent to remove hazardous dye from wastewater.

Facile synthesis of cobalt fluoride (CoF2)/multi-walled carbon nanotube (MWCNT) nanocomposites and improvement of their electrochemical performance as cathode materials for Li-ion batteries

“…MWCNTs (MR99, Carbon Nano-material Technology Co., Ltd) were used after acid treatment by following a previously reported procedure. 30 Cobalt precursor–MWCNT nanocomposites were obtained using a precipitation method. Co(NO 3 ) 2 ·6H 2 O ethanolic solution (5 mmol) was prepared, and MWCNTs were added, at a mass ratio of CoF 2 : MWCNTs of 7 : 3.…”

Recent Advances in the Removal of Organic Dyes from Aqueous Media with Conducting Polymers, Polyaniline and Polypyrrole, and Their Composites

“…A separate class of adsorbents is represented by the polyaniline-coated carbonaceous materials, e.g., activated carbon [ 7 , 64 ]; activated carbonized peanut shells [ 65 ]; activated carbons based on prickly pear seeds [ 66 ]; carbonized tea waste [ 67 ]; graphene [ 47 , 68 ]; multiwall carbon nanotubes [ 8 ] or reduced graphene oxide [ 30 , 69 , 70 ]. Only exceptionally, polyaniline was decorated in a reverse manner by an inorganic component, such as copper(II) oxide [ 71 ].…”

ZnO nanostructure synthesis for the photocatalytic degradation of azo dye methyl orange from aqueous solutions utilizing activated carbon

“…Several researchers have recently used photolysis as one of the advanced oxidation processes (AOPs) to get rid of dyes from wa s tewater [7]. Without altering the sub s trate, the photocatalytic reaction is catalyzed by light and can proceed more quickly [8]. Under the right circum s tances, semiconductors function as cataly s ts due to the down breaking energy between the capacitance and conduction bands [9].…”