Novel hierarchical CuNiAl LDH nanotubes with excellent peroxidase-like activity for wide-range detection of glucose

被引:17
作者
Wu, Lihong [1 ,2 ]
Zhou, Xuechun [1 ,2 ]
Wan, Gengping [1 ,2 ]
Tang, Yulin [1 ,2 ]
Shi, Shaohua [1 ,2 ]
Xu, Xuefei [1 ]
Wang, Guizhen [1 ,2 ]
机构
[1] Hainan Univ, Minist Educ, Key Lab Adv Mat Trop Isl Resources, Haikou 570228, Hainan, Peoples R China
[2] Qingdao Univ Sci & Technol, Inst Adv Elect Mat, Qingdao 266042, Peoples R China
基金
中国国家自然科学基金;
关键词
ATOMIC LAYER DEPOSITION; FREE COLORIMETRIC DETECTION; MAGNETIC NANOPARTICLES; CATALYTIC-ACTIVITY; HYDROGEN-PEROXIDE; DOUBLE HYDROXIDES; VISUAL DETECTION; MICROWAVE-ABSORPTION; CARBON NANOCOILS; GRAPHENE OXIDE;
D O I
10.1039/d0dt03288c
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Novel hierarchical CuNiAl layered double hydroxide (CuNiAl LDH) nanotubes were prepared with in situ transformation of Al2O3 produced using the atomic layer deposition (ALD) method. Based on the characterizations using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), FT-IR spectrometry, scanning electron microscopy (SEM) and transmission electron microscopy (TEM), CuNiAl LDH displays a typical nanotube-like structure consisting of uniform ultrathin nanoflakes. It is also confirmed that nitrate precursors play a crucial role in the formation of the LDH hierarchical structure. The unique hierarchical tube-like structure for CuNiAl LDH can supply more active sites and higher surface areas, leading to outstanding peroxidase mimicking property. The kinetic analyses indicate that the catalytic behavior of CuNiAl LDH follows classic Michaelis-Menten models and the affinity of CuNiAl LDH to the substrate is significantly higher than horseradish peroxidase. A simple and label-free method was developed for the colorimetric detection of glucose. As low as 2.9 mu M of glucose can be detected with a broad linear range from 10 to 200 mu M. The established method is also proved to be suitable for glucose detection in juice samples.
引用
收藏
页码:95 / 102
页数:8
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