Self-healing and high reusability of Au nanoparticles catalyst based on supramolecular hydrogel

He, Tianci; Luo, Langli; Yang, Jun; Liu, Yuanxun; Liu, Simin; Zhang, Xiongzhi

doi:10.1016/j.colsurfa.2019.123954

Cited by 16 publications

(4 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gel–sol/sol–gel phase transitions have been applied for the detection of many biologically and environmentally important analytes, such as enzymes. Extensive recent research efforts have been made to explore their detection applications based on the disassembly-triggered fluorescence/nuclear magnetic resonance (NMR) signal turn on or the self-assembly/aggregation-induced fluorescence turn on. , ROS are active derivatives of oxygen metabolism in all biological systems, which include also the first response of the immune system to an infection, irritation, or damage, closely related to many diseases, including cancer, and generally mainly include H 2 O 2 , superoxygen free radicals ( − ·O 2 ), hydroxy-free radicals (·OH), singlet oxygen ( 1 O 2 ), peroxy free radicals (ROO·), hypochloric acid/hypochloric acid ions (HOCl/ – OCl), and so on. Biomedical and nanotechnology research has developed a series of probe materials to detect abnormally high levels of ROS and, finally, achieve a responsive treatment.…”

Section: Enzymatic Biomedical Health Monitoring Of Bioactive Hydrogelsmentioning

confidence: 98%

Enzyme-Laden Bioactive Hydrogel for Biocatalytic Monitoring and Regulation

Wang

2021

Acc. Chem. Res.

View full text Add to dashboard Cite

Metrics & MoreArticle Recommendations CONSPECTUS: Enzymes, a class of highly efficient and specific catalysts in Nature, dictate a myriad of reactions that constitute various cascades in biological systems. There is growing evidence that many cellular reactions within metabolic pathways are catalyzed by matrix-associated multienzyme complexes, not via the free enzymes, verifying the vital effects of microenvironmental organization, which would reveal implications for the high efficiency, specificity, and regulation of metabolic pathways. The extracellular matrix (ECM), as the noncellular component, is composed of various proteins such as collagens, laminins, proteoglycans, and remodeling enzymes, playing the key role in tissue architecture and homeostasis. Hydrogels are defined as highly hydrated polymer materials and maintain structural integrity by physical and chemical force, which are thought of as the most suitable materials for matching the chemical, physical, and mechanical properties with natural ECM. As one specific type of soft and wet materials, hydrogels are suitable three-dimensional carriers to locally confine bioactive guests, such as enzymes, for molecular-level biological interactions. The efficient cascade catalysis can be realized by enzyme-laden hydrogels, which can potentially interact with cells and tissues by material-to-biology communication. In this Account, we present recent progress on the preparation of enzymatic bioactive hydrogels, including in situ coassembly, in situ cross-linking strategy, and in situ enzymatic radical polymerization technology, further promoting their applications on biomedical tissue engineering, biocatalytic health monitoring, and therapeutic research. First, we provide a brief introduction of the basic concept related to an enzymatic strategy in living systems and the importance of bioinspired enzyme-laden bioactive hydrogel systems. We discuss the difficulties of the fabrication of a bioactive hydrogel with a high catalytic efficiency, thereby providing the novel molecular design and regulation based on a noncovalent coassembly and in situ self-immobilization strategy to obtain the compartmentalized enzyme-laden structure. Then the applications of an enzyme-laden bioactive hydrogel for biocatalytic applications are discussed in detail. The enzyme-laden bioactive hydrogel can maintain the favorable perception and regulation behavior of enzymes with optimal enzymatic efficacy between this confined hydrogel network and a surrounding environment. A highlight to the advances in the responsively biocatalytic monitoring and regulation of bioactive hydrogel, including the enzymatic biomedical tissue engineering and health monitoring, enzymatic regulation of tumor reactive oxygen species and therapeutic research are given. Finally, the outlook of open challenges and future developments of this rapidly evolving field is provided. This Account with highlights of diverse enzyme-laden bioactive hydrogel systems not only provides interesting insights to understand the casc...

show abstract

Section: Enzymatic Biomedical Health Monitoring Of Bioactive Hydrogelsmentioning

confidence: 98%

Enzyme-Laden Bioactive Hydrogel for Biocatalytic Monitoring and Regulation

Wang

2021

Acc. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The Au/Q [8] hydrogel was used as both a catalyst and a reaction media in the reduction process of 4-nitrophenol (4-NP) with aqueous NaBH4 solution [119]. These hydrogel composite catalyst systems have self-healing qualities and may be reused up to seven times.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

Cucurbit[n]uril-based supramolecular hydrogels: Synthesis, properties and applications

Huang

Redshaw

et al. 2023

Coordination Chemistry Reviews

View full text Add to dashboard Cite

“…Silver nanoparticles are widely used in catalysis due to the availability of their valance electrons, long-term stability, high surface area, and effective cost [ 24 ]. However, silver nanoparticles tend to aggregate in solutions and suffer difficulty in recovering from the reaction medium for reusability purposes [ 25 ]. The immobilization of the silver nanoparticles into conducting polymer matrices can provide long-term stability and enhance its electro and catalytic activities [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

“…Composites of PPy/Ag were prepared by UV-induced polymerization of pyrrole in the presence of silver nitrate [11], hydrothermal treatment of pyrrole solution with silver oxide (Ag 2 O) at elevated temperatures [12], or hydrothermal treatment of pyrrole and the reaction medium for reusability purposes [25]. The immobilization of the silver nanoparticles into conducting polymer matrices can provide long-term stability and enhance its electro and catalytic activities [26].…”

Section: Introductionmentioning

confidence: 99%

One-Step Accelerated Synthesis of Conducting Polymer/Silver Composites and Their Catalytic Reduction of Cr(VI) Ions and p-Nitrophenol

2023

View full text Add to dashboard Cite

In this paper, silver nitrate was used as an oxidant to prepare polyaniline, polypyrrole, and poly(3,4-ethylene dioxythiophene)/silver composites through a simultaneous oxidation/reduction process. In addition, p-phenylenediamine was added with 1 mole% relative to the concentrations of the monomers to accelerate the polymerization reaction. The prepared conducting polymer/silver composites were characterized by scanning and transmission electron microscopies to study their morphologies; Fourier-transform infrared and Raman spectroscopies to confirm their molecular structures; and thermogravimetric analysis (TGA) to study their thermal stabilities. The silver content in the composites was estimated by energy-dispersive X-ray spectroscopy, ash analysis, and TGA. The conducting polymer/silver composites were utilized for the remediation of water pollutants through catalytic reduction. Hexavalent chromium ions (Cr(VI)) were photocatalytically reduced to trivalent chromium ions, and p-nitrophenol was catalytically reduced to p-aminophenol. The catalytic reduction reactions were found to follow the first-order kinetic model. Among the prepared composites, polyaniline/silver composite has shown the highest activity for the photocatalytic reduction of Cr(VI) ions with an apparent rate constant of 0.226 min–1 and efficiency of 100% within 20 min. Additionally, poly(3,4-ethylene dioxythiophene)/silver composite showed the highest catalytic activity towards the reduction of p-nitrophenol with an apparent rate constant of 0.445 min–1 and efficiency of 99.8% within 12 min.

show abstract

Self-healing and high reusability of Au nanoparticles catalyst based on supramolecular hydrogel

Cited by 16 publications

References 60 publications

Enzyme-Laden Bioactive Hydrogel for Biocatalytic Monitoring and Regulation

Enzyme-Laden Bioactive Hydrogel for Biocatalytic Monitoring and Regulation

Cucurbit[n]uril-based supramolecular hydrogels: Synthesis, properties and applications

One-Step Accelerated Synthesis of Conducting Polymer/Silver Composites and Their Catalytic Reduction of Cr(VI) Ions and p-Nitrophenol

Contact Info

Product

Resources

About