No abstract

Organic dyes used to shade numerous materials on an industrial level causes water pollution. To meet the need for the removal of the dye-laden water the mechanistic methodology is developed in which catalyst (ZnO), oxidizer (H2O2), and irradiation of low dose (4 KGy) are involved. Oxidizers and catalysts are characterized for surface morphology by SEM, functional groups by FTIR, crystallinity by XRD, particle size by PSA, and for elemental ratio by EDX. A solution ranging from 2 ppm to 8 ppm of Congo red (CR) dye, ZnO (100 μg) as a catalyst, H2O2 (100 μL), as an oxidizer, and 4 KGy energy radiations were used during the degradation analysis for 30, 60, 90, and 120 min. The enhanced effect is shown by using the oxidizer, catalyst, and irradiation at a time. Moreover, it shows a degradation of 99 % for 2 ppm and 4 ppm within 60 min while 6 ppm almost 99 % within 90 min, and 8 ppm almost 96.76 % within 120 min. The established mechanistic methodology can also be applied to actual aqueous industrial samples.

At present times electromagnetic (EM) pollution is increasing due to a lot of progress and achievements in the electronics field. There is a dire need to develop materials that have greater EM energy absorption/emission properties. We report here the synthesis of a nanocomposite of carbonaceous material, reduced graphene oxide (rGO) with Chloroprene (CP) grafted polymethyl methacrylate (CP-g-pMMA), i.e. rGO/CP-g-pMMA. FTIR confirms the grafting of Chloroprene rubber and the presence of rGO. XRD shows the crystallinity of rGO alone and in the composites as well. SEM images showed smooth texture for neat polymer while nanocomposite showed a leafy appearance of the reduced graphene oxide (rGO). The viscosity of pure CP was 3740 cps while CP-g-pMMA was 1644 cps. A slight decrease was observed after the addition of rGO. Enhancement in thermal properties from 264 °C to 269 °C showed that the composites were thermally more stable than the virgin CP and CP-g-pMMA. The permittivity and alternating current conductivity were checked by Radio Frequency (RF) impedance and material analyzer in the range of (1–1000 MHz) X-band and (1–3 GHz) S-band. The nanocomposites showed the lowest percolation (0.32 vol. %) yet reported. The nanocomposites showed low real and absolute permittivity. The electrical and permittivity analysis of the rGO/CP-g-pMMA nanocomposites revealed that they can be potential candidates for their applications in electronic devices as an absorber.

No abstract

No abstract