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13.03.2023 | Original Research

Thiol-functionalized chitosan poly(protic ionic liquids) hydrogel selectively anchors gold nanoparticles for aqueous catalysis

verfasst von: Lihua Zhang, Song Feng, Furong Huang, Bo Li, Yunqi Li, Hailiang Sheng, Lijie Hu, Songmiao Liang, Haibo Xie

Erschienen in: Cellulose | Ausgabe 6/2023

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Abstract

Well-dispersed gold nanoparticles (Au NPs) anchored by polymeric three-dimensional hydrogels for catalysis have received great attention, especially in aqueous-phase catalysis. In this study, thiol-functionalized chitosan poly(protic ionic liquids) hydrogel (TCPPILH) is delicately designed and prepared as a selective support material to anchor Au NPs by taking advantages of Au-thiol chemistry and facile preparation of protic ionic liquids (PILs). The TCPPILH was successfully synthesized by a protonation reaction of chitosan with 3-mercaptopropionic acid (MPA) and mercaptosuccinic acid (MSA) in water, and followed by shaping in ethanol coagulation bath via solution-gelation transition, and the properties can be facilely adjusted by changing the feed ratio of MPA and MSA. It is found that the TCPPILH can act as a selective support for adsorption of Au³⁺ ions, and a maximal anchoring capacity for Au NPs could reach up to 151.5 mg/g. The as-prepared TCPPILH@Au NPs catalysts were systematically characterized by FTIR, XPS, SEM, TEM, XRD and ICP-OES analysis, and the findings demonstrated that the TCPPILH could effectively inhibit the agglomeration of Au NPs (ca. 4.20 nm in diameter). As a proof of concept, hydrogenation of water pollutes, such as 4-nitrophenol and azo dyes with NaBH₄ as reductant was selected as model applications, and the results indicated that TCPPILH@Au NPs catalysts exhibited high catalytic activity and satisfactory reusability.

Graphical abstract

Thiol-functionalized chitosan poly(protic ionic liquids) hydrogel (TCPPILH) was delicately designed and prepared as a selective support material to adsorb Au³⁺ and anchoring Au NPs by taking advantages of Au-thiol chemistry and facile preparation of protic ionic liquids (PILs). This TCPPILH@Au NPs catalysts exhibited desired catalytic activity for the hydrogenation of 4-nitrophenol and azo dyes in water.

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Titel: Thiol-functionalized chitosan poly(protic ionic liquids) hydrogel selectively anchors gold nanoparticles for aqueous catalysis
verfasst von: Lihua Zhang
Song Feng
Furong Huang
Bo Li
Yunqi Li
Hailiang Sheng
Lijie Hu
Songmiao Liang
Haibo Xie
Publikationsdatum: 13.03.2023
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 6/2023
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-023-05126-7

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