ArticleScientific reports2026
NiCd/ZnO nanocomposites: novel materials for photocatalytic degradation of Allura Red dye.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Pristine ZnO, binary CdZnO, and ternary NiCdZnO nanocomposites were synthesized via simple co-precipitation method and systematically characterized by XRD, SEM, TEM/HRTEM, EDX mapping, Raman spectroscopy, PL, DRS, UV-VIS, and BET analyses. The results confirmed well-crystalline hexagonal wurtzite structures with controlled morphology, mesoporosity, and band-gap tuning (3.2 eV for ZnO, 3.0 eV for CdZnO, and 2.45 eV for NiCdZnO). Photoluminescence analysis revealed reduced electron-hole recombination in the Cd- and Ni-modified nanocomposites. Under UV-VIS irradiation, NiCdZnO achieved 95% degradation of Allura Red (AR) dye within 50 min, compared with 80% for CdZnO and 50% for ZnO, following pseudo-first-order kinetics. COD analysis further confirmed strong mineralization, with NiCdZnO showing 95-100% reduction at 10 ppm, outperforming CdZnO (80%) and ZnO (65%). Radical scavenging experiments indicated the involvement of reactive oxygen species, while recyclability tests demonstrated stable performance. These results indicate that Cd and Ni incorporation into ZnO can generate a synergistic enhancement in photocatalytic activity, and the present study provides a detailed evaluation of this co-modified system for the degradation of AR dye, a target pollutant that has not been widely explored with such nanocomposites.
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