Green synthesis of nickel-integrated chitosan-modified CeO 2 nanocatalyst for the efficient hydrogenation of 4-NP and azo dyes

This paper reports the green synthesis and characterization of nickel-integrated chitosan-modified cerium oxide (CHS-CeO @Ni) nanocatalyst aimed at the efficient hydrogenation of 4-nitrophenol (4-NP) and the reduction of azo dyes such as methyl orange (MO) and Congo red (CR). The CHS-CeO @Ni nanocat...

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Bibliographic Details
Published in:International journal of biological macromolecules 2024-12, Vol.283 (Pt 2), p.137651
Main Authors: Ali, Syed Kashif, Hakami, Othman, Zelai, Taharh, Alamrii, Abdullah Ali, Srivastava, Aman Raj, Ahmad, Iftkhar, Shahzaib, Adnan
Format: Article
Language:English
Subjects:
Azo Compounds - chemistry
Catalysis
Cerium - chemistry
Chitosan - chemical synthesis
Chitosan - chemistry
Coloring Agents - chemistry
Green Chemistry Technology
Hydrogenation
Nickel - chemistry
Nitrophenols - chemistry
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Summary:This paper reports the green synthesis and characterization of nickel-integrated chitosan-modified cerium oxide (CHS-CeO @Ni) nanocatalyst aimed at the efficient hydrogenation of 4-nitrophenol (4-NP) and the reduction of azo dyes such as methyl orange (MO) and Congo red (CR). The CHS-CeO @Ni nanocatalyst was synthesized via a green method, where Arnebia benthamii plant extract was used as a reducing agent to deposit nickel nanoparticles onto the CHS-CeO nanocomposite. Results confirmed the successful integration of Ni into the CHS-CeO matrix, resulting in a highly crystalline, mesoporous structure with a substantial surface area of 78.447 m /g. The catalytic activity was evaluated in reducing MO, CR, and 4-NP in the presence of NaBH . The nanocatalyst exhibited remarkable efficiency, reducing MO and CR in 16 and 14 min, respectively, with pseudo-first-order rate constants of 0.173 min and 0.179 min . For 4-NP, complete reduction to 4-aminophenol was achieved within 19 min, with a rate constant of 0.112 min . The enhanced catalytic performance is attributed to the synergistic interaction between cerium oxide and nickel nanoparticles, highlighting the potential of CHS-CeO @Ni as a sustainable solution for environmental remediation.
ISSN:1879-0003