![]() The calculated maximum capacity, qm, determined from the Langmuir model was 392.156 mg/g. Among all, the optimal RO16 removal was found to be 94.77% at a pH of 4 and in addition, the adsorption kinetics confirmed to be pseudo-second-order with more suitability towards the Langmuir isotherm, where it is presumed to be the formation of a monolayer of dye molecule at the homogeneous absorbent surface. The experiments were conducted for the study of effects against changes in pH, time, and dose at room temperature, where we observed for a pH impact on the dye adsorption capacity in the range of 2–12. Following the synthesis and characterization of formed Cu(I)-PANI composite, the batch experiments performed for the removal of RO16 dye indicated that the composite has the capacity to reduce the coloring from RO16. To overcome some of the limitations of activated carbon like efficiency, cost-effectiveness, and reusability, the present work deals with Cu(I)-based polyaniline (PANI) composite for the removal of reactive orange 16 (RO16) dye. The photocatalytic degradation of thiophene under visible-light irradiation while using 4% polyaniline/mesoporous Cu2O was 2.87, 2.20, and 1.34 times more effective than that observed when using Cu2O nanoparticles, polyaniline/Cu2O nanoparticles, and mesoporous Cu2O, respectively. The polyaniline/mesoporous Cu2O and polyaniline/Cu2O nanoparticles are core-shell and spherical nanoparticles, respectively. TEM images reveal that the mesoporous and nanoparticulate Cu2O materials occur as uniform microspheres and spherical nanoparticles, respectively. Adding polyaniline to mesoporous and nanoparticulate Cu2O decreases the surface areas of the nanoparticles to 120 and 32 m(2)/g, respectively. The surface areas of the mesoporous and nanoparticulate Cu2O materials were 140 and 40 m(2)/g, respectively. ![]() The catalytic performance of the samples during the photocatalytic oxidation of thiophene under visible-light irradiation was determined. For comparison, Cu2O nanoparticles and polyaniline/Cu2O nanoparticles were also prepared using a hydrothermal method. Polyaniline/mesoporous Cu2O core-shell nanocomposites with different mass ratios of polyaniline/mesoporous Cu2O were prepared using a hydrothermal method. ![]()
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