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兰州大学机构库  > 化学化工学院  > 期刊论文
题名: Three-dimensional hierarchical porous PtCu dendrites: A highly efficient peroxidase nanozyme for colorimetric detection of H2O2
作者: Lu, Y; Ye, WC; Yang, Q; Yu, J; Wang, Q; Zhou, PP; Wang, CM(王春明); Xue, DS(薛德胜); Zhao, SQ
收录类别: SCIE ; EI
出版日期: 2016-07
刊名: SENSORS AND ACTUATORS B-CHEMICAL
卷号: 230, 页码:721-730
英文摘要: Three-dimensional (3D) hierarchical porous PtCu dendrites (HPPtCuDs) as a novel peroxidase nanozyme were fabricated by the formation of 3D hierarchical PtCu dendrites via galvanic replacement, followed by chemical dealloying to selectively dissolve a less noble metal Cu from PtCu alloys. The morphology, structure and composition of HPPtCuDs were characterized in detail. Due to the special 3D porous dendritic structure (geometric effect) and electronic effect, the resulting HPPtCuDs exhibited intrinsic peroxidase-like activity, catalyzing the classical peroxidase substrate 3,3',5,5'-tetramethyl-benzidine (TMB) by hydrogen peroxide (H2O2). The optimized conditions including pH, temperature, concentrations of both H2O2 and HPPtCuDs were obtained. Kinetic study indicated that the HPPtCuDs showed a stronger affinity for both TMB and H2O2 with lower Michaelis-Menten constant (Km) values, compared with hierarchical PtCu dendrites and monometallic Pt microspheres. Based on the high catalytic activity, the HPPtCuDs was used to construct a colorimetric H2O2 sensor with a wide linear range of 0.3-325 M and a low limit of detection (LOD) of 0.1 M. The LOD was much lower than the H2O2 allowance level of US FDA (0.05 wt%, ca. 15 M). With good anti -interference toward various anions and cations and good stability and reusability, this colorimetric H2O2 sensor was successfully applied to the determination of H202 in dairy milk products with satisfactory results. (C) 2016 Elsevier B.V. All rights reserved.
关键词: PtCu alloy ; Porous dendritic structure ; Peroxidase-like activity ; Colorimetric detection ; H2O2 sensor
作者部门: [Lu, Yuan ; Ye, Weichun ; Yang, Qin ; Yu, Jing ; Wang, Qin ; Zhou, Panpan ; Wang, Chunming] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China ; [Lu, Yuan ; Ye, Weichun ; Yang, Qin ; Yu, Jing ; Wang, Qin ; Zhou, Panpan ; Wang, Chunming] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China ; [Ye, Weichun ; Xue, Desheng] Lanzhou Univ, Key Lab Magnetism & Magnet Mat MOE, Lanzhou 730000, Peoples R China ; [Ye, Weichun ; Xue, Desheng] Lanzhou Univ, Dept Phys, Lanzhou 730000, Peoples R China ; [Zhao, Suqin] Qinhai Univ Nationalities, Coll Phys & Elect Informat Engn, Xining 810007, Peoples R China
通讯作者: Ye, WC (reprint author), Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China. ; Ye, WC (reprint author), Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China. ; Ye, WC (reprint author), Lanzhou Univ, Key Lab Magnetism & Magnet Mat MOE, Lanzhou 730000, Peoples R China. ; Ye, WC (reprint author), Lanzhou Univ, Dept Phys, Lanzhou 730000, Peoples R China.
学科分类: Chemistry; Electrochemistry; Instruments & Instrumentation
文章类型: Article
所属项目编号: Post-Doctoral Science Foundation of China [2013M542393] ; Fundamental Research Fund for the Central Universities [lzujbky-2014-69]
所属项目名称: 中国博士后科学基金 ; 中央高校基本科研业务费专项资金
项目资助者: CPSF ; LZU
语种: 英语
DOI: 10.1016/j.snb.2016.02.130
ISSN号: 0925-4005
WOS记录号: WOS:000374329300092
EI记录号: 20161002078917
IR记录号: WOS:000374329300092
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/180495
Appears in Collections:化学化工学院_期刊论文

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Recommended Citation:
Lu, Y,Ye, WC,Yang, Q,et al. Three-dimensional hierarchical porous PtCu dendrites: A highly efficient peroxidase nanozyme for colorimetric detection of H2O2[J]. SENSORS AND ACTUATORS B-CHEMICAL,2016,230:721-730.
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