Recyclable ferromagnetic chitosan nanozyme for decomposing phenol

Jiang, Jianfang; He, Chun‐Yang; Wang, Sen; Jiang, Hao; Li, Jida; Li, Linshan

doi:10.1016/j.carbpol.2018.06.068

Cited by 36 publications

(18 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the absorbance peak of Fe 3 O 4 @LNPs + TMB + H 2 O 2 at 652 nm was significantly higher than that of Fe 3 O 4 + TMB + H 2 O 2 , indicating Fe 3 O 4 @LNPs possessed stronger peroxidase-liked catalytic activity than Fe 3 O 4 NPs due to its considerable dispersion ability. It was consistent with the reported result that Fe 3 O 4 NPs stabilized by chitosan exhibited strong catalytic activity than Fe 3 O 4 NPs [34].…”

Section: Resultssupporting

confidence: 93%

Fe3O4 Nanoparticles Loaded on Lignin Nanoparticles Applied as a Peroxidase Mimic for the Sensitively Colorimetric Detection of H2O2

Zhang

Guo

et al. 2019

Nanomaterials

View full text Add to dashboard Cite

Lignin is the second largest naturally renewable resource and is primarily a by-product of the pulp and paper industry; however, its inefficient use presents a challenge. In this work, Fe3O4 nanoparticles loaded on lignin nanoparticles (Fe3O4@LNPs) were prepared by the self-assembly method and it possessed an enhanced peroxidase-like activity. Fe3O4@LNPs catalyzed the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H2O2 to generate a blue color, was observable by the naked eye. Under the optimal conditions, Fe3O4@LNPs showed the ability of sensitive colorimetric detection of H2O2within a range of 5–100 μM and the limit of detection was 2 μM. The high catalytic activity of Fe3O4@LNPs allows its prospective use in a wide variety of applications, including clinical diagnosis, food safety, and environmental monitoring.

show abstract

Section: Resultssupporting

confidence: 93%

Fe3O4 Nanoparticles Loaded on Lignin Nanoparticles Applied as a Peroxidase Mimic for the Sensitively Colorimetric Detection of H2O2

Zhang

Guo

et al. 2019

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Various nanozyme based applications have been extensively explored, including in vitro and in vivo biosensors, and antibacterial and disease therapies, such as cancer theranostics, bone marrow therapy, and wound healing . In addition, environmental protection is also an important area. In the following we briefly introduce the advance of nanozymes in these fields ( Figure [14d,23,24,30]).…”

Section: Applications Of Nanozymesmentioning

confidence: 99%

“…Metal, especially iron, is by far the most commonly used as active phase and a wide range of materials have been tested as supports or catalysts themselves. [10,14b,15,29,31s,47]…”

Section: Applications Of Nanozymesmentioning

confidence: 99%

Recent Advances in Nanozyme Research

2018

View full text Add to dashboard Cite

inflammatory response to combat infections and can also react with many important biomolecules including proteins, lipids, and nucleic acid polymers (RNA and DNA). [7] Low dosage of ROS plays important roles in signal transduction, cell proliferation/migration/differentiation, and body defense against pathogen invasion. However, abnormally elevated ROS level can destroy redox homeostasis and cause oxidative stress and serious damage of structure and function of macromolecules in the cell. Research during the last decade has shown that oxidative stress could lead to diseases such as chronic inflammation and eventually diabetes, cancer, as well as cardiovascular, neurological, and pulmonary diseases. [8] Enzyme systems (e.g., superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase) are responsible for protecting cells from the detrimental effects of ROS by modulating the intracellular ROS level.Nanozyme can also modulate the ROS level in cells (Figure 2). [9] The ROS scavenging abilities of nanozymes largely originate from the SOD mimicking activities, which convert superoxide into H 2 O 2 and subsequently to O 2 and H 2 O, and thus reduce the intracellular ROS level and enhance cell viability. The generation of ROS originates from their peroxidases (POD) activities, which convert H 2 O 2 to OH· radicals, and oxidase activities, which convert O 2 to H 2 O 2 . Outside the cell, ROS can react with biologically active molecules (such as glucose, dopamine, glutathione, and adenosine triphosphate), organic compound (such as phenol and dyes), and pollutants from aqueous solutions. Thus the nanozymes could play important roles in in vitro test and environmental protection. [10] Earlier reports on nanozymes mainly focused on the aspect of experimental study and rarely focused on the theoretical work and mechanism clarification. In this progress report, we first introduce various nanozymes and highlight recent experimental development of new nanozymes that have been investigated to mimic various enzymes. Then we review their applications in various fields including biosensing, bioimaging, therapeutics, and environmental protection. At last, we summarize the catalytic mechanisms and address the challenges of experimental and computational research in this field. The Structure of NanozymesIssues of material design for high catalytical activity, selectivity, and durability are recently accentuated. Among them As a new generation of artificial enzymes, nanozymes have the advantages of high catalytic activity, good stability, low cost, and other unique properties of nanomaterials. Due to their wide range of potential applications, they have become an emerging field bridging nanotechnology and biology, attracting researchers in various fields to design and synthesize highly catalytically active nanozymes. However, the thorough understanding of experimental phenomena and the mechanisms beneath practical applications of nanozymes limits their rapid development. Herein, the progress of experimental and computational...

show abstract

“…For chemical oxidation, it needs a Fenton reagent including Fe 3+ , Fe 2+ , and H 2 O 2 . However, chemical oxidation usually produces iron ions and sludge, which were easily discharged into the environment, resulting in secondary pollution [88,89]. Biological degradation has the properties of being highly efficient and environmentally friendly.…”

Section: Nanozymes In Hazardous Degradationmentioning

confidence: 99%

Progress and Trend on the Regulation Methods for Nanozyme Activity and Its Application

et al. 2019

View full text Add to dashboard Cite

Natural enzymes, such as biocatalysts, are widely used in biosensors, medicine and health, the environmental field, and other fields. However, it is easy for natural enzymes to lose catalytic activity due to their intrinsic shortcomings including a high purification cost, insufficient stability, and difficulties of recycling, which limit their practical applications. The unexpected discovery of the Fe3O4 nanozyme in 2007 has given rise to tremendous efforts for developing natural enzyme substitutes. Nanozymes, which are nanomaterials with enzyme-mimetic catalytic activity, can serve as ideal candidates for artificial mimic enzymes. Nanozymes possess superiorities due to their low cost, high stability, and easy preparation. Although great progress has been made in the development of nanozymes, the catalytic efficiency of existing nanozymes is relatively low compared with natural enzymes. It is still a challenging task to develop nanozymes with a precise regulation of catalytic activity. This review summarizes the classification and various strategies for modulating the activity as well as research progress in the different application fields of nanozymes. Typical examples of the recent research process of nanozymes will be presented and critically discussed.

show abstract

Recyclable ferromagnetic chitosan nanozyme for decomposing phenol

Cited by 36 publications

References 32 publications

Fe3O4 Nanoparticles Loaded on Lignin Nanoparticles Applied as a Peroxidase Mimic for the Sensitively Colorimetric Detection of H2O2

Fe3O4 Nanoparticles Loaded on Lignin Nanoparticles Applied as a Peroxidase Mimic for the Sensitively Colorimetric Detection of H2O2

Recent Advances in Nanozyme Research

Progress and Trend on the Regulation Methods for Nanozyme Activity and Its Application

Contact Info

Product

Resources

About