Solar Light Photoactive Floating Polyaniline/TiO2 Composites for Water Remediation

Abstract

In the present study, the development of innovative polyurethane-polyaniline/TiO2 modified floating materials applied in the sorption and photodegradation of rhodamine B from water matrix under solar light irradiation is reported. All the materials were fabricated with inexpensive and easy approaches and were properly characterized. The effect of the kind of polyaniline (PANI) dopant on the materials’ behavior was investigated, as well as the role of the conducting polymer in the pollutant abatement on the basis of its physico-chemical characteristics. Rhodamine B is removed by adsorption and/or photodegradation processes depending on the type of doping agent used for PANI protonation. The best materials were subjected to recycle tests in order to demonstrate their stability under the reaction conditions. The main transformation products formed during the photodegradation process were identified by ultraperformance liquid chromatography-mass spectrometry (UPLC/MS). The results demonstrated that photoactive floating PANI/TiO2 composites are useful alternatives to common powder photocatalysts for the degradation of cationic dyes.

Efficient Day-and-Night NO2 Abatement by Polyaniline/TiO2 Nanocomposites

“…The test carried out under light irradiation (both UVA and LED) led to similar results ( Figures S7 and S8 ), confirming that, in photocatalytic processes, pristine PANI does not act as a photocatalyst, but as a photosensitizer [ 81 ].…”

Trace Mn decorating nitrogen-doped carbon electrocatalysts for self-powered bio-electro-fenton cells toward simulated wastewater treatment

“…Numerous studies have shown that the primary degradation pathways of RhB involve N -de-ethylation, destruction of the dye's chromophore structure, and ring opening. 39–41 In Fig. 6a, we present the possible pathways of RhB degradation.…”

“…† Numerous studies have shown that the primary degradation pathways of RhB involve N-de-ethylation, destruction of the dye's chromophore structure, and ring opening. [39][40][41] In Fig. 6a 42,43 Then the intermediates with m/z value of 314 may occur de-amination, leading to the generation of intermediates with m/z values of 165, 278 and 202.…”

Ternary Polyaniline@Bi2O3-BiOCl Nanocomposites as Innovative Highly Active Photocatalysts for the Removal of the Dye under Solar Light Irradiation

“…Preparing PANI-semiconductor composites has drawn significant attention because of their particular electron and hole-transporting properties, simplicity of synthesis, and chemical stability [ 6 , 32 , 33 , 34 , 35 ]. Although the effect of PANI coating on traditional semiconductors, mainly TiO 2 and ZnO, has been extensively investigated, only a few studies have been dedicated to the photocatalytic properties of PANI/Bi 2 O 3 composites.…”