Applications of nanozymes in the environment

Meng, Yutong; Li, Wenfeng; Pan, Xiangliang; Gadd, Geoffrey Michael

doi:10.1039/c9en01089k

Cited by 108 publications

(83 citation statements)

References 153 publications

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“…Similarly, hydrogen peroxide is used as a disinfectant as it can be decomposed to generate free radicals that attack the major cellular components of bacteria. Nanozymes, along with photocatalytic cooperation, were reported to kill bacteria effectively [ 110 ]. Nanozymes, when surface-bound, help in the elimination of antibiotic-resistant bacteria and delay the onset of bacterial resistance emergence.…”

Section: Nanotechnologymentioning

confidence: 99%

Resistance and Adaptation of Bacteria to Non-Antibiotic Antibacterial Agents: Physical Stressors, Nanoparticles, and Bacteriophages

et al. 2021

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Antimicrobial resistance is a significant threat to human health worldwide, forcing scientists to explore non-traditional antibacterial agents to support rapid interventions and combat the emergence and spread of drug resistant bacteria. Many new antibiotic-free approaches are being developed while the old ones are being revised, resulting in creating unique solutions that arise at the interface of physics, nanotechnology, and microbiology. Specifically, physical factors (e.g., pressure, temperature, UV light) are increasingly used for industrial sterilization. Nanoparticles (unmodified or in combination with toxic compounds) are also applied to circumvent in vivo drug resistance mechanisms in bacteria. Recently, bacteriophage-based treatments are also gaining momentum due to their high bactericidal activity and specificity. Although the number of novel approaches for tackling the antimicrobial resistance crisis is snowballing, it is still unclear if any proposed solutions would provide a long-term remedy. This review aims to provide a detailed overview of how bacteria acquire resistance against these non-antibiotic factors. We also discuss innate bacterial defense systems and how bacteriophages have evolved to tackle them.

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Section: Nanotechnologymentioning

confidence: 99%

Resistance and Adaptation of Bacteria to Non-Antibiotic Antibacterial Agents: Physical Stressors, Nanoparticles, and Bacteriophages

et al. 2021

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“…In the past decade, several research groups have explored the use of nanozymes for the detection of metal ions [ 90 , 91 , 92 , 93 ]. Similar to natural enzymes, the peroxidase, oxidase or catalase-like activity of nanozymes can be inhibited or enhanced by the presence of metal ions.…”

Section: Detection Of Metal Ionsmentioning

confidence: 99%

“…They have been established to be the cause of toxic and carcinogenic effects on humans through contamination of drinking water and foods [ 167 ]. Significant efforts have been devoted to the remediation work to remove these pollutants and/or degrade them to less harmful products [ 92 , 166 , 168 ].…”

Section: Environmental Remediation With Nanozymesmentioning

confidence: 99%

“…However, microbes and enzymes can only be functional and effective in narrow thermal and pH windows. The cost of producing enzymes, their lack of recyclability and the fact that biodegradation can be quite slow have hindered their large-scale, widespread application in environmental pollutant remediation [ 92 , 166 ].…”

Section: Environmental Remediation With Nanozymesmentioning

confidence: 99%

“…Nanozymes have been shown to demonstrate catalytic properties, e.g., peroxidase- and oxidase-like, which are utilised in the degradation of pollutants by natural enzymes. Nanozymes could overcome enzyme limitations in terms of cost of production, recyclability, higher rate of reactions and wider operational windows (pH and temperature) [ 3 , 92 , 168 ]. The previous section has shown that nanozymes are effective for the detection of heavy metals and organic pollutants in the environment.…”

Section: Environmental Remediation With Nanozymesmentioning

confidence: 99%

See 2 more Smart Citations

Nanozymes for Environmental Pollutant Monitoring and Remediation

Wong¹,

Vuong²,

Chow³

2021

Sensors

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Nanozymes are advanced nanomaterials which mimic natural enzymes by exhibiting enzyme-like properties. As nanozymes offer better structural stability over their respective natural enzymes, they are ideal candidates for real-time and/or remote environmental pollutant monitoring and remediation. In this review, we classify nanozymes into four types depending on their enzyme-mimicking behaviour (active metal centre mimic, functional mimic, nanocomposite or 3D structural mimic) and offer mechanistic insights into the nature of their catalytic activity. Following this, we discuss the current environmental translation of nanozymes into a powerful sensing or remediation tool through inventive nano-architectural design of nanozymes and their transduction methodologies. Here, we focus on recent developments in nanozymes for the detection of heavy metal ions, pesticides and other organic pollutants, emphasising optical methods and a few electrochemical techniques. Strategies to remediate persistent organic pollutants such as pesticides, phenols, antibiotics and textile dyes are included. We conclude with a discussion on the practical deployment of these nanozymes in terms of their effectiveness, reusability, real-time in-field application, commercial production and regulatory considerations.

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Fine‐Tuning Electron Transfer for Nanozyme Design

Zong,

Xu,

Pang

et al. 2024

Adv Healthcare Materials

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Nanozymes, with their versatile composition and structural adaptability, present distinct advantages over natural enzymes including heightened stability, customizable catalytic activity, cost‐effectiveness, and simplified synthesis process, making them as promising alternatives in various applications. Recent advancements in nanozyme research have shifted focus from serendipitous discovery toward a more systematic approach, leveraging machine learning, theoretical calculations, and mechanistic explorations to engineer nanomaterial structures with tailored catalytic functions. Despite its pivotal role, electron transfer, a fundamental process in catalysis, has often been overlooked in previous reviews. This review comprehensively summarizes recent strategies for modulating electron transfer processes to fine‐tune the catalytic activity and specificity of nanozymes, including electron‐hole separation and carrier transfer. Furthermore, the bioapplications of these engineered nanozymes, including antimicrobial treatments, cancer therapy, and biosensing are also introduced. Ultimately, this review aims to offer invaluable insights for the design and synthesis of nanozymes with enhanced performance, thereby advancing the field of nanozyme research.

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Applications of nanozymes in the environment

Abstract: Nanozymes have great potential in detection of heavy metals, organic pollutants and treatment of pathogenic bacteria and waste water and air.

Cited by 108 publications

References 153 publications

Resistance and Adaptation of Bacteria to Non-Antibiotic Antibacterial Agents: Physical Stressors, Nanoparticles, and Bacteriophages

Resistance and Adaptation of Bacteria to Non-Antibiotic Antibacterial Agents: Physical Stressors, Nanoparticles, and Bacteriophages

Nanozymes for Environmental Pollutant Monitoring and Remediation

Fine‐Tuning Electron Transfer for Nanozyme Design

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