Ultraviolet-induced Photoreduction of rhodamine 6G textile effluent catalyzed by annealed metamorphic Nano-CuO
In the present investigation, nano-CuO catalysts with diverse metamorphic nanostructures, such as sphere-like, sponge-like, and flower-like, were scrutinized through a dropwise precipitation approach followed by annealing at various temperatures and durations. XRD analysis indicates that nano-CuO po...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Results in Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715625000475 |
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| Summary: | In the present investigation, nano-CuO catalysts with diverse metamorphic nanostructures, such as sphere-like, sponge-like, and flower-like, were scrutinized through a dropwise precipitation approach followed by annealing at various temperatures and durations. XRD analysis indicates that nano-CuO possesses a monoclinic crystalline phase structure (a = 4.691 Å, b = 3.423 Å, c = 5.145 Å, γ = 90o). The UV–Vis absorbance spectra display an absorption band centered around 450 nm, which becomes stronger as the annealing temperature and duration rise. The FTIR spectra exhibit a prominent infrared band at 515 cm−1 due to the stretching vibration of CuO bonds. Nano-CuO has initiated photoreduction of hazardous rhodamine 6G (R6G) textile effluent under ultraviolet (UV) irradiation. The reaction constant rates comply with pseudo-first-order kinetics, resulting in a 4-fold increase from 1.184 × 10−4 min−1 to 4.408 × 10−4 min−1, with the highest R2 value of ≈ 0.99. The sponge-like porous nanostructure (<100 nm) with reduced bandgap, increased pore dimensions, and improved crystallinity enhances photocatalytic degradation rate and efficiency. The photocatalytic efficiency of current nano-CuO can still be optimized by increasing the optical source power or combining it with other metal-based catalysts for prospective sustainable wastewater remediation. |
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| ISSN: | 2211-7156 |