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AuthorLi, Xiaolong
Other AuthorsYang, Xuanyu
Other AuthorsCheng, Xiaowei
Other AuthorsZhao, Yuye
Other AuthorsLuo, Wei
Other AuthorsElzatahry, Ahmed A.
Other AuthorsAlghamdi, Abdulaziz
Other AuthorsHe, Xing
Other AuthorsSu, Jiacan
Other AuthorsDeng, Yonghui
Available date2022-05-22T09:12:24Z
Publication Date2020
Publication NameJournal of Colloid and Interface Science
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.jcis.2020.02.118
URIhttp://hdl.handle.net/10576/31362
AbstractIn past decade, Pt-based nanomaterials as peroxidase mimics have attracted much attention for H2O2 and glucose detection. However, easy aggregation of Pt nanoparticles (Pt NPs) greatly decreases their peroxidase-like activity. In this work, novel Pt/EMT nanocomposites were prepared by uniformly loading Pt NPs (5?8 nm) onto the support of ultrasmall EMT zeolite (15?20 nm), a kind of low-silica microporous aluminosilicate material. The hybrid Pt/EMT nanomaterials could be well dispersed in water to form a homogeneous suspension, and were then utilized as a superior peroxidase-like catalyst for oxidation of 3,3?,5,5?-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). The optimal catalyst of 2.6Pt/EMT nanocomposite exhibited excellent catalytic performance toward H2O2 and TMB than natural enzyme of horseradish peroxidase (HRP) by using a steady-state kinetic analysis based on the typical Michaelis-Menten kinetics theory. The peroxidase-like catalyst showed a promising activity in a wide pH and temperature range as well as the long-term stability. A facile and reliable colorimetric assay based on the peroxidase mimic of Pt/EMT nanocomposite was constructed for precise detection of H2O2 and glucose in a wide linear range, with low limits of detection of 1.1 ?M and 13.2 ?M, respectively. Due to high selectivity to glucose against other sugars on the catalyst, the method was demonstrated to accurately measure the concentration of glucose in real samples including human blood serum and fruit juices, indicating a potential application of the Pt/EMT nanocomposites as a robust peroxidase mimic and a reliable biosensor in the fields of clinical diagnosis, pharmaceutical, food research and so on. 2020
Languageen
PublisherAcademic Press Inc.
SubjectCatalyst activity
SubjectCatalyst selectivity
SubjectClinical research
SubjectColorimetry
SubjectDiagnosis
SubjectFruit juices
SubjectGlucose
SubjectMetal nanoparticles
SubjectNanocomposites
SubjectPlatinum
SubjectSilica
SubjectZeolites
SubjectColorimetric assays
SubjectGlucose detection
SubjectHomogeneous suspensions
SubjectLow limits of detections
SubjectMichaelis-Menten kinetic
SubjectMicroporous aluminosilicates
SubjectPeroxidase mimics
SubjectPeroxidase-like activities
SubjectPlatinum compounds
Subjectglucose
Subjecthorseradish peroxidase
Subjecthydrogen peroxide
Subjectnanocomposite
Subjectperoxidase
Subjectplatinum nanoparticle
Subjectzeolite
Subjectglucose
Subjecthydrogen peroxide
Subjectmetal nanoparticle
Subjectplatinum
Subjectzeolite
Subjectadsorption
SubjectArticle
Subjectcolorimetry
Subjectdesorption
Subjectfruit juice
Subjectglucose assay
Subjecthuman
Subjectlimit of detection
Subjectmaximum reaction velocity
SubjectMichaelis Menten kinetics
Subjectnonhuman
Subjectoxidation
Subjectparticle size
SubjectpH
Subjectpriority journal
Subjectsurface area
Subjecttemperature
Subjecttransmission electron microscopy
SubjectX ray photoemission spectroscopy
SubjectX ray powder diffraction
Subjectchemistry
Subjectfruit and vegetable juice
Subjectsurface property
SubjectFruit and Vegetable Juices
SubjectGlucose
SubjectHumans
SubjectHydrogen Peroxide
SubjectMetal Nanoparticles
SubjectParticle Size
SubjectPlatinum
SubjectSurface Properties
SubjectZeolites
TitleHighly dispersed Pt nanoparticles on ultrasmall EMT zeolite: A peroxidase-mimic nanoenzyme for detection of H2O2 or glucose
TypeArticle
Pagination300-311
Volume Number570


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