Synthesis of NiO-CeO2 nanocomposite for electrochemical sensing of perilous 4-nitrophenol

被引：35

作者：

Ahmad, Naushad ^{[1
]}

Alam, Manawwer ^{[1
]}

Wahab, Rizwan ^{[2
]}

Ahmad, Javed ^{[2
]}

Ubaidullah, Mohd ^{[1
]}

Ansari, Anees A. ^{[3
]}

Alotaibi, Nawaf M. ^{[1
]}

机构：

[1] King Saud Univ, Dept Chem, Coll Sci, Riyadh 11451, Saudi Arabia

[2] King Saud Univ, Dept Zool, Coll Sci, Riyadh 11451, Saudi Arabia

[3] King Saud Univ, King Abdullah Inst Nanotechnol, Riyadh 11451, Saudi Arabia

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2019年 / 30卷 / 19期

关键词：

NITROPHENOL ISOMERS; FACILE SYNTHESIS; PERFORMANCE; NANOSTRUCTURES; MORPHOLOGY; REDUCTION; NICKEL; SENSOR; CHROMATOGRAPHY; NANOPARTICLE;

D O I：

10.1007/s10854-019-02113-2

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Well-crystalline NiO-CeO2 nanocomposites have been fabricated by ignition method and investigated by X-ray diffraction, Fourier Transform Infrared, UV-Vis diffuse reflectance spectroscopy, Thermal gravimetric analysis, BET surface area, and transmission electron microscopy. The detailed characterizations disclosed that the pre-calcine (700 degrees C) nanocomposite (NCC) has two pure phases: cubic fluorite phase (CeO2) and cubic face-centered phase (NiO). Finally, the pre-calcine NCC nanocomposite was applied as electron intermediators for the electrochemical sensing of 4-nitrophenol (4-NP). Compared with as-grown modified electrode (NCG/GCE), pre-calcine electrode (NCC/GCE) exhibited more excellent conductivity and better electrocatalytic mediator for 4-NP. It was found that the NCC/GCE sensor displayed diffusion-controlled kinetics and excellent sensitivity (3.68 A mu M-1 cm(-2)). The reduction current is directly proportional to the 4-NP concentration, ranging from 1 to 20 mu M with lower detection limit of 2.48 mu M.

引用

页码：17643 / 17653

页数：11

共 59 条

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