Ultrafine gold nanoparticles dispersed in conjugated microporous polymers with sulfhydryl functional groups to improve the reducing activity of 4-nitrophenol

Chen, Hao; Zhuang, Qixin; Wang, Hao; Zhai, Xinrang; Zhang, Kexin; Deng, Hanyu; Dong, Wei; Xie, Aming

doi:10.1016/j.colsurfa.2022.129459

Cited by 7 publications

(1 citation statement)

References 42 publications

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“…In recent years, electroactive polymers or conductive polymers have been developed and used as promising catalyst carriers. The high specific surface area and microporosity not only confine the growth of metallic nanoparticles, but also highly dispersion compared to conventional catalyst carriers (e.g., graphene, metal oxide) [ 37 ]. More interestingly, metal compounds (e.g., HAuCl 4 − ) have been reported to reduce nanoparticles in situ via electroactive polymers, which provides a convenient way for metal particle catalysts [ 38 ].…”

Section: Introductionmentioning

confidence: 99%

In Situ Redox Synthesis of Highly Stable Au/Electroactive Polyimide Composite and Its Application on 4-Nitrophenol Reduction

et al. 2023

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In this study, we developed a series of Au/electroactive polyimide (Au/EPI-5) composite for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) using NaBH4 as a reducing agent at room temperature. The electroactive polyimide (EPI-5) synthesis was performed by chemical imidization of its 4,4′-(4.4′-isopropylidene-diphenoxy) bis (phthalic anhydride) (BSAA) and amino-capped aniline pentamer (ACAP). In addition, prepare different concentrations of Au ions through the in-situ redox reaction of EPI-5 to obtain Au nanoparticles (AuNPs) and anchored on the surface of EPI-5 to form series of Au/EPI-5 composite. Using SEM and HR-TEM confirm the particle size (23–113 nm) of the reduced AuNPs increases with the increase of the concentration. Based on CV studies, the redox capability of as-prepared electroactive materials was found to show an increase trend: 1Au/EPI-5 < 3Au/EPI-5 < 5Au/EPI-5. The series of Au/EPI-5 composites showed good stability and catalytic activity for the reaction of 4-NP to 4-AP. Especially, the 5Au/EPI-5 composite shows the highest catalytic activity when applied for the reduction of 4-NP to 4-AP within 17 min. The rate constant and kinetic activity energy were calculated to be 1.1 × 10−3 s−1 and 38.9 kJ/mol, respectively. Following a reusability test repeated 10 times, the 5Au/EPI-5 composite maintained a conversion rate higher than 95%. Finally, this study elaborates the mechanism of the catalytic reduction of 4-NP to 4-AP.

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Section: Introductionmentioning

confidence: 99%