1
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Jing W, Shi Q, Zheng M, Yang Y, Qiang S, Jia Z, Zhu T, Zhao Y, Qu Y, Lu F, Liu F, Dai Y. Smartphone-assisted nanozyme sensor array constructed based on reaction kinetics for the discrimination and identification of phenolic compounds. Anal Chim Acta 2024; 1287:342133. [PMID: 38182397 DOI: 10.1016/j.aca.2023.342133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/01/2023] [Accepted: 12/10/2023] [Indexed: 01/07/2024]
Abstract
Although the research on nanozymes has attracted widespread attention in recent years, the development of highly active and multifunctional nanozymes remains a challenge. Here, a bifunctional AMP-Cu nanozyme with laccase- and catecholase-like activities was successfully prepared at room temperature with Cu2+ as the metal ion and adenosine-5'-monophosphate (AMP) as the ligand molecule. Based on the excellent catalytic performance of AMP-Cu, a three-channel colorimetric sensor array was constructed using reaction kinetics as the sensing unit to achieve high-throughput detection and identification of six common phenolic compounds at low concentrations. This strategy simplifies the construction of sensor array and demonstrates the capacity to obtain multidimensional data from a single material. Finally, with the assistance of smartphones and homemade dark boxes, a portable on-site detection method for phenolic compounds was developed. This work would contribute to the development of portable sensors and the highly efficient identification of phenolic compounds in complex samples.
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Affiliation(s)
- Wenjie Jing
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China; Tianjin Key Laboratory of Biological Feed Additive Enterprise, S&E Burgeoning Biotechnology (Tianjin) Co., Ltd, No.27, Shengda Second Branch Road, Wangwenzhuang Industrial Park, Xiqing District, Tianjin, 300383, PR China.
| | - Qihao Shi
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Mingqiang Zheng
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Yajun Yang
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Shan Qiang
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Zejun Jia
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Tongtong Zhu
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Yuman Zhao
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Yan Qu
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Fuping Lu
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Fufeng Liu
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
| | - Yujie Dai
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, No.29 of 13th Street, TEDA, Tianjin, 300457, PR China.
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2
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Mohseni N, Moodi M, Kefayat A, Shokati F, Molaabasi F. Challenges and Opportunities of Using Fluorescent Metal Nanocluster-Based Colorimetric Assays in Medicine. ACS Omega 2024; 9:3143-3163. [PMID: 38284078 PMCID: PMC10809695 DOI: 10.1021/acsomega.3c06884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 11/27/2023] [Accepted: 12/14/2023] [Indexed: 01/30/2024]
Abstract
Development of rapid colorimetric methods based on novel optical-active metal nanomaterials has provided methods for the detection of ions, biomarkers, cancers, etc. Fluorescent metal nanoclusters (FMNCs) have gained a lot of attention due to their unique physical, chemical, and optical properties providing numerous applications from rapid and sensitive detection to cellular imaging. However, because of very small color changes, their colorimetric applications for developing rapid tests based on the naked eye or simple UV-vis absorption spectrophotometry are still limited. FMNCs with peroxidase-like activity have significant potential in a wide variety of applications, especially for point-of-care diagnostics. In this review, the effect of using various capping agents and metals for the preparation of nanoclusters in their colorimetric sensing properties is explored, and the synthesis and detection mechanisms and the recent advances in their application for ultrasensitive chemical and biological analysis regarding human health are highlighted. Finally, the challenges that remain as well as the future perspectives are briefly discussed. Overcoming these limitations will allow us to expand the nanocluster's application for colorimetric diagnostic purposes in medical practice.
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Affiliation(s)
- Nasim Mohseni
- Biomaterials
and Tissue Engineering Research Group, Department of Interdisciplinary
Technologies, Breast Cancer Research Center,
Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Mohammad Moodi
- Department
of Materials Science and Engineering, Ferdowsi
University of Mashhad, Mashhad, Iran
| | - Amirhosein Kefayat
- Biomaterials
and Tissue Engineering Research Group, Department of Interdisciplinary
Technologies, Breast Cancer Research Center,
Motamed Cancer Institute, ACECR, Tehran, Iran
- Department
of Oncology, Isfahan University of Medical
Sciences, Isfahan, Iran
| | - Farhad Shokati
- Biomaterials
and Tissue Engineering Research Group, Department of Interdisciplinary
Technologies, Breast Cancer Research Center,
Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Fatemeh Molaabasi
- Biomaterials
and Tissue Engineering Research Group, Department of Interdisciplinary
Technologies, Breast Cancer Research Center,
Motamed Cancer Institute, ACECR, Tehran, Iran
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3
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Han J, Gu Y, Yang C, Meng L, Ding R, Wang Y, Shi K, Yao H. Single-atom nanozymes: classification, regulation strategy, and safety concerns. J Mater Chem B 2023; 11:9840-9866. [PMID: 37822275 DOI: 10.1039/d3tb01644g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Nanozymes, nanomaterials possessing enzymatic activity, have been studied extensively by researchers. However, their complex composition, low density of active sites, and inadequate substrate selectivity have hindered the maturation and widespread acceptance of nanozymes. Single-atom nanozymes (SAzymes) with atomically dispersed active sites are leading the field of catalysis due to their exceptional performance. The maximum utilization rate of atoms, low cost, well-defined coordination structure, and active sites are the most prominent advantages of SAzymes that researchers favor. This review systematically categorizes SAzymes based on their support type and describes their specific applications. Additionally, we discuss regulation strategies for SAzyme activity and provide a comprehensive summary of biosafety challenges associated with these enzymes.
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Affiliation(s)
- Jiping Han
- College of public health, School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China.
| | - Yaohua Gu
- College of public health, School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China.
| | - Changyi Yang
- General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Lingchen Meng
- College of public health, School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China.
| | - Runmei Ding
- College of public health, School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China.
| | - Yifan Wang
- College of public health, School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China.
| | - Keren Shi
- State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Huiqin Yao
- College of public health, School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China.
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4
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Liu L, Deng J, Wang Y, He X, He H, Chen X, Liao D, Tong Z. N-Rich and Sulfur-Doped Nano Hollow Carbons with High Oxidase-like Activity Prepared Using a Green Template of CaCO 3 for Bacteriostasis. Langmuir 2023; 39:13279-13286. [PMID: 37672643 DOI: 10.1021/acs.langmuir.3c01754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Nanozymes, enzyme-mimicking nanomaterials, have attracted increasing attention due to their low cost, high stability, and catalytic ability compared with natural enzymes. However, the catalytic efficiency of the nanozymes is still relatively low, and catalytic reaction mechanisms remain unclear. To address these issues, herein we prepared nitrogen-riched and sulfur-codoped nano hollow carbons (N/S-HCS) using a green and useful template of CaCO3. N/S-HCS exhibits enhanced oxidase-like activity and catalytic kinetic performance. It could directly oxidize the colorless 3,3',5,5'-tetramethylbenzidine (TMB) to the heavy blue colored ox-TMB without H2O2. The maximum reaction rate (Vmax) is 186.7 × 10-8 M·s-1, and Michaelis-Menten constant (Km) is 0.162 mM. DFT results show that N and S codoping could work synergistically to provide more active sites, resulting in the superior ability to adsorb oxygen and enhanced catalytic activity. Meantime, we develop a multispectral characterization strategy to unravel catalytic reaction mechanisms about N/S-HCS. It successfully induces the generation of superoxide (•O2-) and hydroxyl (•OH) during the colorimetric reaction which are the key intermediate products of the catalytic reaction. Furthermore, N/S-HCS increased the cellular reactive oxygen species level significantly and induced bacteriostasis to more than 95% of Escherichia coli.
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Affiliation(s)
- Liangqin Liu
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
- Guangxi Engineering Academy of Calcium Carbonate Industrialization, Nanning 530004, China
| | - Jun Deng
- Department of Renal Rheumatology, The Fourth Hospital of Changsha, Changsha 410006, China
| | - Yinlong Wang
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
- Guangxi Engineering Academy of Calcium Carbonate Industrialization, Nanning 530004, China
| | - Xin He
- State Key Laboratory of Chem/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Huibing He
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Xiaopeng Chen
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
- Guangxi Engineering Academy of Calcium Carbonate Industrialization, Nanning 530004, China
| | - Dankui Liao
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
- Guangxi Engineering Academy of Calcium Carbonate Industrialization, Nanning 530004, China
| | - Zhangfa Tong
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
- Guangxi Engineering Academy of Calcium Carbonate Industrialization, Nanning 530004, China
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5
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Singh S, Mukherjee TK. Coacervate-Based Plexcitonic Assembly toward Peroxidase-like Activity and Ultrasensitive Glucose Sensing. ACS Appl Mater Interfaces 2023. [PMID: 37200240 DOI: 10.1021/acsami.3c02863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Inbuilt catalytic centers anchored inside the confined architecture of artificial nanoreactors have gained tremendous attention owing to their vast applicability in various catalytic transformations. However, designing homogeneously distributed catalytic units with exposed surfaces in confined environment is a challenging task. Here, we have utilized quantum dot (QD)-embedded coacervate droplets (QD-Ds) as a confined compartment for the in situ synthesis of gold nanoparticles (Au NPs) without any additional reducing agent. High-resolution transmission electron microscopy images reveal homogeneous distribution of 5.6 ± 0.2 nm-sized Au NPs inside the QD-Ds (Au@QD-Ds). The in situ synthesized Au NPs are found to be stable over a period of 28 days without any agglomeration. Control experiments reveal that the free surface carboxylic acid groups of embedded QDs simultaneously act as reducing and stabilizing agents for Au NPs. Notably, these Au@QD-Ds exhibit superior peroxidase-like activity compared to bulk aqueous Au NPs and Au@QDs under similar experimental conditions. The observed peroxidase-like activity follows the classical Michaelis-Menten model inside the Au@QD-Ds via the fast electron-transfer pathway. The enhanced peroxidase-like activity has been explained by considering confinement, mass action, and the ligand-free surface of embedded Au NPs. The present plexcitonic nanocomposites exhibit excellent recyclability over several consecutive cycles without any compromise in their catalytic activity. Finally, a cascade reaction with glucose oxidase (GOx)-loaded Au@QD-Ds have been utilized for colorimetric detection of glucose with a limit of detection of 272 nM in solution as well as on filter paper. The present work highlights a facile and robust methodology for the fabrication of optically active functional hybrid plexcitonic assemblies and may find importance in various fields including bioanalytical chemistry and optoelectronics.
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Affiliation(s)
- Shivendra Singh
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Simrol, Indore 453552, M.P., India
| | - Tushar Kanti Mukherjee
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Simrol, Indore 453552, M.P., India
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6
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Mukherjee A, Ashrafi AM, Bytesnikova Z, Svec P, Richtera L, Adam V. An investigation on the multiple roles of CeO2 nanoparticle in electrochemical sensing: biomimetic activity and electron acceptor. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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7
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Hao P, Liu Y, Dong S, Fan G, Li G, Xie M, Liu Q. Enhanced peroxidase-like activity of 2(3), 9(10), 16(17), 23(24)-octamethoxyphthalocyanine modified CoFe LDH for a sensor array for reducing substances with catechol structure. Anal Bioanal Chem 2023; 415:289-301. [PMID: 36352035 DOI: 10.1007/s00216-022-04404-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 10/06/2022] [Accepted: 10/25/2022] [Indexed: 11/11/2022]
Abstract
Improving the catalytic activity of artificial nanozymes to realize the real-time detection of small molecules becomes an important task. Herein, a highly active nanozyme, 2(3), 9(10), 16(17), 23(24)-octamethoxyphthalocyanine (Pc(OH)8) modified CoFe LDH microspheres (Pc(OH)8-CoFe LDH) have been prepared by the two-step hydrothermal method. The 3,3',5,5'-tetramylbenzidine (TMB), a chromogenic substrate, was fast oxidized into blue oxTMB by H2O2 in the presence of Pc(OH)8-CoFe LDH, indicating that Pc(OH)8-CoFe LDH possesses high peroxidase-like activity rather than pure CoFe LDH. The enhancement peroxidase-like activity of the Pc(OH)8-CoFe LDH is ascribed to the synergistic action between Pc(OH)8 and CoFe LDH. Experimental results of radical scavenger and fluorescence probe verify that superoxide radical (•O2-) plays an important role during the catalytic reaction. Interestingly, the absorption intensity of reaction system has been enhanced largely, due to adding of the reducing substances containing catechol structure. Based on this, the three reducing substances (dopamine, procyanidin B2, catechins) containing catechol structure were distinguished from other reducing substances without catechol structure. Thus, a colorimetric array has been constructed using reaction time as the sensing element to realize the sensitive and selective recognition of catechol structures at a certain concentration.
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Affiliation(s)
- Pingping Hao
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China
| | - Yaru Liu
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China
| | - Shanmin Dong
- Shandong Hualu-Hengsheng Chemical Co., Ltd, Dezhou, 253024, People's Republic of China
| | - Gaochao Fan
- Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Guijiang Li
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China. .,Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
| | - Min Xie
- Community Health Service Center (University Hospital), University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
| | - Qingyun Liu
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China.
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8
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Fan D, Ou J, Chen L, Zhang L, Zheng Z, Yu H, Meng X, Zhu M. An Oligopeptide-Protected Ultrasmall Gold Nanocluster with Peroxidase-Mimicking and Cellular-Imaging Capacities. Molecules 2022; 28. [PMID: 36615266 DOI: 10.3390/molecules28010070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/12/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
Recent decades have witnessed the rapid progress of nanozymes and their high promising applications in catalysis and bioclinics. However, the comprehensive synthetic procedures and harsh synthetic conditions represent significant challenges for nanozymes. In this study, monodisperse, ultrasmall gold clusters with peroxidase-like activity were prepared via a simple and robust one-pot method. The reaction of clusters with H2O2 and 3,3',5,5'-tetramethylbenzidine (TMB) followed the Michaelis-Menton kinetics. In addition, in vitro experiments showed that the prepared clusters had good biocompatibility and cell imaging ability, indicating their future potential as multi-functional materials.
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9
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Zheng G, Cui Y, Jiang Z, Zhou M, Yu Y, Wang P, Wang Q. Fiber-based photothermal, UV-resistant, and self-cleaning coatings fabricated by silicon grafted copolymers of chitosan derivatives and gallic acid. Int J Biol Macromol 2022; 222:1560-1577. [PMID: 36195235 DOI: 10.1016/j.ijbiomac.2022.09.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 09/22/2022] [Accepted: 09/25/2022] [Indexed: 11/25/2022]
Abstract
Superhydrophobic and hydrophobic properties are generally created by adopting low surface free energy materials. Therefore, most studies have focused on creating surface hydrophobicity by using hydrophobic or fluorinated materials. However, few studies are reported on realizing surface hydrophobicity by directly introducing hydrophilic molecules, which is also a challenge. Herein, with platinum nanozyme as the catalyst, the novel hydrophobic coatings have been rapidly gained via anchoring the polymer of hydrophilic gallic acid and chitosan or chitosan quaternary ammonium salt onto cotton fabric surface. Notably, the novel hydrophobic coatings exhibit significant advances compared with conventional hydrophobic ones created by utilizing fluorinated or hydrophobic materials, which breaks the limitation of employing low surface energy materials for gaining surface hydrophobicity. Subsequently, the sodium methyl silicate was grafted on the polymer's coatings to strengthen surface hydrophobicity and the abrasion resistance of hydrophobicity. Interestingly, the heating could induce the hydrophilicity of cotton fabric to recover to hydrophobicity. Moreover, the hydrophobic coatings also possess good photothermal conversion, UV resistance, and anti-oxidation activity for self-cleaning application and oil water separation. Briefly, the present work may open a new direction for preparing novel hydrophobic coatings by combining gallic acid and chitosan-based macromolecular carbohydrates.
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Affiliation(s)
- Guolin Zheng
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Yifan Cui
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Zhe Jiang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Man Zhou
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Yuanyuan Yu
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Ping Wang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, PR China
| | - Qiang Wang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, PR China.
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10
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Siddiqui AS, Ahmad MA, Nawaz MH, Hayat A, Nasir M. Decorating Zirconium on Graphene Oxide to Design a Multifunctional Nanozyme for Eco-Friendly Detection of Hydrogen Peroxide. Catalysts 2022; 12:1105. [DOI: 10.3390/catal12101105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Peroxidase enzymes are crucial in analytical chemistry owing to significant peroxide analytes and their key role in hydrogen peroxide (H2O2) detection. Therefore, exploiting appropriate catalysts for the peroxidase like reactions has become crucial for achieving desired analytical performance. Zirconium (Zr) has attracted growing interest, as a safe and stable potential eco-friendly catalyst for various organic transformations that address increasing environmental challenges. Hence, aiming at fast, sensitive and selective optical detection of H2O2, a colorimetric platform is presented here, based on the excellent peroxidase enzyme-like activity of Zr decorated on graphene oxide (GO). The synergistic effect achieved due to intimate contact between an enzyme like Zr and the high surface area 0f GO ensures efficient electron transfer that increases the chemical and catalytic activity of the composite and advances the decomposition of H2O2 into hydroxyl radicals. The designed probe, thus, efficiently catalyzes the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), via hydroxyl radicals, thereby transforming the colorless TMB into blue oxidized TMB within 2 min. The catalytic mechanism of the Zr-GO enzyme mimic is proposed herein and verified using a fluorescent probe terephthalic acid (TA) and other scavenger experiments. The multifunctional optical probe allows sensitive and highly selective recognition of H2O2 in a linear range from 100 to 1000 µM with a low detection limit of 0.57 µM. Essentially, the direct accessibility of Zr prevents having to use the complicated preparation and purification procedures mostly practiced for conventional biozymes and nanozymes. The devised method offers several gains, including being green and an inexpensive catalyst, having lower LOD, being fast, cost-effective and sensitive, and having selective work-up procedures.
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11
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Ge H, Zhang H. Fungus-Based MnO/Porous Carbon Nanohybrid as Efficient Laccase Mimic for Oxygen Reduction Catalysis and Hydroquinone Detection. Nanomaterials 2022; 12:nano12091596. [PMID: 35564305 PMCID: PMC9103193 DOI: 10.3390/nano12091596] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 04/27/2022] [Accepted: 05/01/2022] [Indexed: 01/27/2023]
Abstract
Developing efficient laccase-mimicking nanozymes via a facile and sustainable strategy is intriguing in environmental sensing and fuel cells. In our work, a MnO/porous carbon (MnO/PC) nanohybrid based on fungus was synthesized via a facile carbonization route. The nanohybrid was found to possess excellent laccase-mimicking activity using 2,2′-azinobis (3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt (ABTS) as the substrate. Compared with the natural laccase and reported nanozymes, the MnO/PC nanozyme had much lower Km value. Furthermore, the electrochemical results show that the MnO/PC nanozyme had high electrocatalytic activity toward the oxygen reduction reaction (ORR) when it was modified on the electrode. The hybrid nanozyme could catalyze the four-electron ORR, similar to natural laccase. Moreover, hydroquinone (HQ) induced the reduction of oxABTS and caused the green color to fade, which provided colorimetric detection of HQ. A desirable linear relationship (0–50 μM) and detection limit (0.5 μM) were obtained. Our work opens a simple and sustainable avenue to develop a carbon–metal hybrid nanozyme in environment and energy applications.
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Abstract
Natural enzymes usually suffer from high production cost, ease of denaturation and inactivation, and low yield, making them difficult to be broadly applicable. As an emerging type of artificial enzyme, nanozymes that combine the characteristics of nanomaterials and enzymes are promising alternatives. On the one hand, nanozymes have high enzyme-like catalytic activities to regulate biochemical reactions. On the other hand, nanozymes also inherit the properties of nanomaterials, which can ameliorate the shortcomings of natural enzymes and serve as versatile platforms for diverse applications. In this review, various nanozymes that mimic the catalytic activity of different enzymes are introduced. The achievements of nanozymes in different cancer diagnosis and treatment technologies are summarized by highlighting the advantages of nanozymes in these applications. Finally, future research directions in this rapidly developing field are outlooked.
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Affiliation(s)
- Xiaodong Zhang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Xiaokai Chen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Yanli Zhao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.
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13
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Zhang J, Zhong Y, Zhang C, Zhang J, Zhuang Z. Mesoporous Core-Shell Pd@Pt Nanospheres as Oxidase Mimics with Superhigh Catalytic Efficiency at Room Temperature. J Phys Chem Lett 2022; 13:2137-2143. [PMID: 35226486 DOI: 10.1021/acs.jpclett.1c03921] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Mesoporous Pt-Pd bimetallic core-shell nanospheres (mPd@Pt NSs) with palladium-rich cores and platinum-rich shells were synthesized via a simple, two-step, wet chemical strategy mediated by nitrogen-doped carbon dots. The BET surface area of mPd@Pt NSs was found to be 210.4 m2·g-1, which is significantly higher than the currently reported unsupported Pt-based nanomaterials. Because of the large active surface area, the as-prepared mPd@Pt NSs show superhigh oxidase activity and exhibit excellent oxidase-like catalytic efficiency with a catalytic constant (Kcat) as high as 2.1 × 103 s-1 at room temperature, which is of the same order of magnitude as the natural horseradish peroxidase (HRP) (Kcat = 4.3 × 103 s-1) at 37 °C and five-fold greater than the reported Kcat values of oxidase-like nanozyme obtained at 30 °C.
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Affiliation(s)
- Jingyun Zhang
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Yajun Zhong
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Chunyan Zhang
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
| | - Junyu Zhang
- Instrumental Analysis Center, Huaqiao University, Xiamen 361021, P. R. China
| | - Zhenjing Zhuang
- School of Medicine, Huaqiao University, Quanzhou 362021, P. R. China
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14
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Wang X, Wen F, He L, Su J, Jiang P, He D. Engineering porous Co–Mn oxide nanosheets with abundant oxygen vacancy as an efficient oxidase-like mimic for heparin colorimetric sensing. Anal Chim Acta 2022; 1198:339564. [DOI: 10.1016/j.aca.2022.339564] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/28/2022] [Accepted: 01/29/2022] [Indexed: 11/30/2022]
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15
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Yang J, Li J, Yan X, Lyu Y, Xing N, Yang P, Song P, Zuo M. Three-Dimensional Hierarchical HRP-MIL-100(Fe)@TiO 2@Fe 3O 4 Janus Magnetic Micromotor as a Smart Active Platform for Detection and Degradation of Hydroquinone. ACS Appl Mater Interfaces 2022; 14:6484-6498. [PMID: 35099171 DOI: 10.1021/acsami.1c18086] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A novel multifunctional Janus magnetic micromotor was designed and constructed by using MIL-100(Fe)@TiO2@Fe3O4 multicore-shells modified with horseradish peroxidase (HRP) as a smart active platform to realize detection and degradation of hydroquinone (HQ). The obtained micromotor showed a unique three-dimensional (3D) hierarchical architecture with highly exposed active sites and could autonomously move at a speed of 140 ± 7.0 μm·s-1 by O2 bubbles generated from the catalytic decomposition of H2O2 fuel. Benefiting from the combination of active self-propulsive motion, high peroxidase-like activity, tuned heterojunctions with matching band structures, and a 3D hierarchical structure, an effective platform involving dynamically sensitive detection and quick removal of HQ from water was established by using the multifunctional HRP-integrated MIL-100(Fe)@TiO2@Fe3O4 Janus micromotor. The proposed multifunctional Janus magnetic micromotor had advantages of simple and feasible fabrication, sensitive detection and effective photo-Fenton degradation of HQ in a wide pH range of 4-7, and magnetic recycling, revealing potential for environmental remediation applications.
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Affiliation(s)
- Jie Yang
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
| | - Jia Li
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
| | - Xiaohui Yan
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics & Centre for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361005, China
| | - Yangsai Lyu
- Department of Mathematics and Statistics, Queen's University, Kingston K7L 3N6, Canada
| | - Ningning Xing
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
| | - Ping Yang
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
| | - Peng Song
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
| | - Min Zuo
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
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16
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Jin H, Ye D, Shen L, Fu R, Tang Y, Jung JCY, Zhao H, Zhang J. Perspective for Single Atom Nanozymes Based Sensors: Advanced Materials, Sensing Mechanism, Selectivity Regulation, and Applications. Anal Chem 2022; 94:1499-1509. [PMID: 35014271 DOI: 10.1021/acs.analchem.1c04496] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nanozymes are a kind of nanomaterial mimicking enzyme catalytic activity, which has aroused extensive interest in the fields of biosensors, biomedicine, and climate and ecosystems management. However, due to the complexity of structures and composition of nanozymes, atomic scale active centers have been extensively investigated, which helps with in-depth understanding of the nature of the biocatalysis. Single atom nanozymes (SANs) cannot only significantly enhance the activity of nanozymes but also effectively improve the selectivity of nanozymes owing to the characteristics of simple and adjustable coordination environment and have been becoming the brightest star in the nanozyme spectrum. The SANs based sensors have also been widely investigated due to their definite structural features, which can be helpful to study the catalytic mechanism and provide ways to improve catalytic activity. This perspective presents a comprehensive understanding on the advances and challenges on SANs based sensors. The catalytic mechanisms of SANs and then the sensing application from the perspectives of sensing technology and sensor construction are thoroughly analyzed. Finally, the major challenges, potential future research directions, and prospects for further research on SANs based sensors are also proposed.
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Affiliation(s)
- Huan Jin
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Daixin Ye
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Lihua Shen
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Ruixue Fu
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Ya Tang
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Joey Chung-Yen Jung
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Hongbin Zhao
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Jiujun Zhang
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
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17
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Honarasa F, Mokhtare R, Mokhtare A, Yousefinejad S. High performance nanozymatic assay-based CuO nanocluster supported by reduced graphene oxide for determination of hydrogen peroxide and ascorbic acid. Process Biochem 2021; 111:256-261. [DOI: 10.1016/j.procbio.2021.10.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Zheng G, Cui Y, Zhou Y, Jiang Z, Wang Q, Zhou M, Wang P, Yu Y. Photoenzymatic Activity of Artificial-Natural Bienzyme Applied in Biodegradation of Methylene Blue and Accelerating Polymerization of Dopamine. ACS Appl Mater Interfaces 2021; 13:56191-56204. [PMID: 34787400 DOI: 10.1021/acsami.1c17098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Enzymes as biocatalysts have attracted extensive attention. In addition to immobilizing or encapsulating various enzymes for combating the easy loss of enzymatic activity, strengthening the enzymatic activity upon light irradiation is a challenge. To the best of our knowledge, the work of spatiotemporally modulating the catalytic activity of artificial-natural bienzymes with a near-infrared light irradiation has not been reported. Inspired by immobilized enzymes and nanozymes, herein a platinum nanozyme was synthesized; subsequently, the platinum nanozyme was grafted on the body of laccase, thus successfully obtaining the artificial-natural bienzyme. The three-dimensional structure of the artificial-natural bienzyme was greatly different from that of the immobilized enzyme or the encapsulated enzyme. The platinum nanozyme possessed excellent laccase-like activity, which was 3.7 times higher than that of laccase. Meanwhile, the coordination between the platinum nanozyme and laccase was proved. Besides, the cascaded catalysis of artificial-natural bienzyme was verified with hydrogen peroxide as a mediator. The enzymatic activities of artificial-natural bienzyme with and without near-infrared light irradiation were, respectively, 46.2 and 29.5% higher than that of free laccase. Moreover, the reversible catalytic activity of the coupled enzyme could be manipulated with and without a near-infrared light at 808 nm. As a result, the degradation rates of methylene blue catalyzed by the coupled enzyme and the platinum nanozyme were higher than that of laccase. Furthermore, accelerating polymerization of the dopamine was also demonstrated. Briefly, this facile strategy may provide a universal approach to control the catalytic activity of other natural enzymes.
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Affiliation(s)
- Guolin Zheng
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Yifan Cui
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Yu Zhou
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Zhe Jiang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Qiang Wang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Man Zhou
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Ping Wang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
| | - Yuanyuan Yu
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Jiangsu Province, Wuxi 214122, P. R. China
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19
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Li Y, Yan J, Shen W, Zhong M, Zhang J. Enhancing the Oxidase‐like Performances of Co
x
Mn
3‐x
O
4
Nanoparticles by Tuning the Mn Content and Decorating Reduced Graphene Oxide. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yanfang Li
- Department of Electronic Engineering School of Electronic Information and Electric Engineering Shanghai Jiao Tong University Shanghai 200240 P.R. China
| | - Jiawei Yan
- Department of Electronic Engineering School of Electronic Information and Electric Engineering Shanghai Jiao Tong University Shanghai 200240 P.R. China
| | - Wenzhuo Shen
- Department of Electronic Engineering School of Electronic Information and Electric Engineering Shanghai Jiao Tong University Shanghai 200240 P.R. China
| | - Min Zhong
- Department of Electronic Engineering School of Electronic Information and Electric Engineering Shanghai Jiao Tong University Shanghai 200240 P.R. China
| | - Jiali Zhang
- Department of Electronic Engineering School of Electronic Information and Electric Engineering Shanghai Jiao Tong University Shanghai 200240 P.R. China
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20
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Ni P, Liu S, Wang B, Chen C, Jiang Y, Zhang C, Chen J, Lu Y. Light-responsive Au nanoclusters with oxidase-like activity for fluorescent detection of total antioxidant capacity. J Hazard Mater 2021; 411:125106. [PMID: 33485225 DOI: 10.1016/j.jhazmat.2021.125106] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/03/2021] [Accepted: 01/08/2021] [Indexed: 06/12/2023]
Abstract
A fluorescent assay for total antioxidant capacity (TAC) detection based on the light-responsive oxidase-like activity of bovine serum albumin-stabilized gold nanoclusters (BSA-AuNCs) has been developed. Thiamine (TH) as the peroxidase substrate usually works at alkaline conditions and thus limits its practical applications. Here, by utilization the light-responsive oxidase-like activity of BSA-AuNCs, TH is oxidized to fluorescent thiochrome under neutral condition in two minutes due to the single oxygen generated by BSA-AuNCs upon light irradiation. After the introduction of antioxidants into the BSA-AuNCs-TH system, the formation of thiochrome is inhibited resulting in the fluorescence decrease. On the basis of the above facts, BSA-AuNCs-TH-based assay has been fabricated and applied successfully to detect antioxidants and the TAC of vitamin C tablets as well as some commercial fruit juice with satisfied results. This work may provide novel insights into developing light-responsive nanozymes-based fluorescent assays.
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Affiliation(s)
- Pengjuan Ni
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China
| | - Siyuan Liu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China
| | - Bo Wang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China
| | - Chuanxia Chen
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China
| | - Yuanyuan Jiang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China
| | - Chenghui Zhang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China
| | - Jianbin Chen
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China
| | - Yizhong Lu
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China.
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21
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Abstract
With the development of enzymes immobilization technology and the discover of nanozymes, catalytic therapy exhibited tremendous potential for neurological diseases therapy. In especial, since the discovery of Fe₃O₄ nanoparticles possessing intrinsic peroxidase-like activity, various nanozymes have been developed and recently started to explore for neurological diseases therapy, such as Alzheimer's disease, Parkinson's disease and stroke. By combining the catalytic activities with other properties (such as optical, thermal, electrical, and magnetic properties) of nanomaterials, the multifunctional nanozymes would not only alleviate oxidative and nitrosative stress on the basis of multienzymes-mimicking activity, but also exert positive effects on immunization, inflammation, autophagy, protein aggregation, which provides the foundation for multifaceted treatments. This review will summarize various types of nanocatalysts and further provides a valuable discussion on multifaceted treatment by nanozymes for neurological diseases, which is anticipated to provide an easily accessible guide to the key opportunities and current challenges of the nanozymes-mediated treatments for neurological diseases.
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Affiliation(s)
- Heping Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Haihe Education Park, Tianjin 300353, People's Republic of China
| | - Xi Chen
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Haihe Education Park, Tianjin 300353, People's Republic of China
| | - Mingxing Mao
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Haihe Education Park, Tianjin 300353, People's Republic of China
| | - Xue Xue
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Haihe Education Park, Tianjin 300353, People's Republic of China
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22
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Hou X, Xu H, Zhen T, Wu W. Recent developments in three-dimensional graphene-based electrochemical sensors for food analysis. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.09.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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23
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Mohammad M, Ahmadpoor F, Shojaosadati SA. Mussel-Inspired Magnetic Nanoflowers as an Effective Nanozyme and Antimicrobial Agent for Biosensing and Catalytic Reduction of Organic Dyes. ACS Omega 2020; 5:18766-18777. [PMID: 32775878 PMCID: PMC7408242 DOI: 10.1021/acsomega.0c01864] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 07/03/2020] [Indexed: 05/08/2023]
Abstract
Mussel-inspired chemistry has been embodied as a method for acquiring multifunctional nanostructures. In this research, a novel mussel-inspired magnetic nanoflower was prepared through a mussel-inspired approach. Herein, magnetic PDA-Cu nanoflowers (NFs) were assembled via incorporating magnetic Fe3O4@SiO2-NH2 core/shell nanoparticles (NPs) into mussel-inspired polydopamine (PDA) and copper phosphate as the organic and inorganic portions, respectively. Accordingly, the flower-like morphology of MNPs PDA-Cu NFs was characterized by scanning electron microscopy (SEM) images. X-ray diffraction (XRD) analysis confirmed the crystalline structure of magnetic nanoparticles (MNPs) and copper phosphate. Vibrating sample magnetometer (VSM) data revealed the superparamagnetic behavior of MNPs (40.5 emu/g) and MNPs PDA-Cu NFs (35.4 emu/g). Catalytic reduction of MNPs PDA-Cu NFs was evaluated through degradation of methylene blue (MB). The reduction of MB pursued the Langmuir-Hinshelwood mechanism and first-order kinetics, in which the apparent reduction rate K app of MB was higher than 1.44 min-1 and the dye degradation ability was 100%. MNPs PDA-Cu NFs also showed outstanding recyclability and reduction efficiency, for at least six cycles. Furthermore, the prepared MNPs PDA-Cu NFs demonstrated a peroxidase-like catalytic activity for catalyzing 3,3',5,5'-tetramethylbenzidine (TMB) to a blue oxidized TMB (oxTMB) solution in the presence of H2O2. Antimicrobial assays for MNPs PDA-Cu and PDA-Cu NFs were conducted on both Gram-negative and Gram-positive bacteria. Moreover, we demonstrated how the existence of magnetic nanoparticles in PDA-Cu NFs influences the inhibition of an increasing zone. Based on the results, mussel-inspired magnetic nanoflowers appear to have great potential applications, including those relevant to biological, catalysis, and environmental research.
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Affiliation(s)
- Mahsa Mohammad
- Biotechnology
Group, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran 14155-114, Iran
| | - Fatemeh Ahmadpoor
- Department
of Materials Engineering, Tarbiat Modares University, Tehran 14115-143, Iran
| | - Seyed Abbas Shojaosadati
- Biotechnology
Group, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran 14155-114, Iran
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