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Anion engineering guided MOF-to-hollow nickel phosphate transformation enabling robust electrochemical platforms for detection of hydrogen peroxide and hydrazine
Ma, Xiaoqing1,3; Lu, Kang3; Yuan, Binfang1; Shi, Wenbing1; Yu, Leyong4; Zhao, Wenxi2
2022-10-15
摘要Rationally designing of transition metal phosphate (TMP) with charming structure and exploiting their electroanalytic functionalities are of great potential and challenging. Herein, in-situ adoption of MOF as the framework and skillfully regulation of the evolution process through the mass ratios of sodium phosphate (namely as both etchants and reactants) and Ni-MOFs led to the configuration of a series of nickel phosphate (NiP) counterparts with well-defined structures and definable compositions, and further their bifunctional sensing performance for H2O2 and N2H4 were investigated, where the ratio of 4:3 prepared NiP, with pure ingredient, amorphous states and 2D scaly nanosheets uniformly decorated 3D hollow scaffolds, collectively reveals rich electrocatalytic sites, shorten ion transfer/diffusion channels and excellent electrical conductivity, thus affording an significant enhancement for its electrochemical behaviors, especially its low detection limit (27.9 nM and 45.1 nM) and wide measurable range (0.001-2.6 mM and 0.005-4.5 mM) for H2O2 and N2H4, respectively. Additionally, its powerful anti-interference and recognition for H2O2 and N2H4 in water samples verify the practicality of our electrochemical platforms. Our design establishes the promising strategy for engineering of new class MOF-derived diversified functionally materials for electmanalytical application and beyond.
关键词Transition metal phosphate 3D hollow nickel phosphate Electrochemical sensors Hydrogen peroxide Hydrazine
DOI10.1016/j.snb.2022.132373
发表期刊SENSORS AND ACTUATORS B-CHEMICAL
卷号369页码:9
通讯作者Yu, Leyong(lyyu@cigit.ac.cn) ; Zhao, Wenxi(zwx.168@163.com)
收录类别SCI
WOS记录号WOS:000855043500007
语种英语