Optical fiber hydrogen sensor based on self-assembled of Au@Pd NPs monolayer film

被引：0

作者：

Song H. ^{[1
]}

Cai Q.-H. ^{[1
]}

Liu M.-Y. ^{[1
]}

Wang Q.-D. ^{[1
]}

Cai Z.-J. ^{[1
]}

Liu Y. ^{[1
]}

机构：

[1] College of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan

来源：

Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2021年 / 29卷 / 09期

关键词：

Au @ Pd nanoparticles; Hydrogen sensor; Nanoparticle film; Optical fiber sensor; Self assembly;

D O I：

10.37188/OPE.20212909.2092

中图分类号：

学科分类号：

摘要：

The large specific surface area advantage of low-dimensional nanomaterials greatly improves the reaction efficiency between materials and environmental gas molecules, which plays a crucial role in improving the sensitivity and response speed of the key hydrogen-sensitive devices in fiber optic hydrogen sensors. In this paper, we describe a new method for the preparation of high-performance Au-Pd core-shell nanoparticle monolayer hydrogen-sensitive thin films by self-assembly at the oil-water interface as well as a transmission fiber hydrogen sensor based on the film. In the experiment, spherical Au nuclei with a particle size of approximately 12 nm were prepared via a hydrothermal synthesis method. A Pd growth liquid was then added to the aqueous solution of Au nuclei to obtain Au-Pd core-shell nanoparticles with a particle size of approximately 22 nm. The Au-Pd core-shell nanoparticles were modified by octadecylamine and transferred to a toluene solution using phase transfer technology. Finally, nanoparticle monolayer hydrogen-sensitive films with high coverage and fewer voids were prepared by pulling at the toluene-water interface. Characterization analysis results showed that the size of the Au-Pd core-shell nanoparticles formed was uniform with outstanding crystallinity, and the density coverage rate of the prepared nanoparticle monolayer film was 87%. A transmission fiber optic hydrogen apparatus was built to characterize the hydrogen response characteristics of the prepared Au-Pd core-shell nanoparticle monolayer at different hydrogen concentrations. The experimental results show that the nanoparticle monolayer hydrogen-sensitive thin film exhibits good stability in a number of cycle tests with high hydrogen response speeds (3 s to 4% of hydrogen and 13 s to 0.1% of hydrogen). The method of preparation of the sensor for rapid and accurate detection of low concentration of hydrogen has a good application prospect. © 2021, Science Press. All right reserved.

引用

页码：2092 / 2100

页数：8

共 21 条

[1] SHARMA A K, PANDEY S, SHARMA K H, Et al., Two dimensional α-MoO<sub>3-</sub><sub>x</sub> nanoflakes as bare eye probe for hydrogen peroxide in biological fluids, Analytica Chimica Acta, 1015, pp. 58-65, (2018)
[2] UDDIN A S M I, YAQOOB U, CHUNG G S., Dissolved hydrogen gas analysis in transformer oil using Pd catalyst decorated on ZnO nanorod array, Sensors and Actuators B: Chemical, 226, pp. 90-95, (2016)
[3] NDAYA C C, JAVAHIRALY N, BRIOUDE A., Recent advances in palladium nanoparticles-based hydrogen sensors for leak detection, Sensors, 19, 20, (2019)
[4] MU Q Q, LIU X B, LIU W., Optical fiber hydrogen sensor with multilayer Au-Pd core-shell nanoparticle membrane sensitization, Optics and Precision Engineering, 27, 8, pp. 1681-1687, (2019)
[5] SUN Y Y, ZHOU Y, CHENG ZH Q, Et al., Experimental study of Schottky diode hydrogen sensor, Transducer and Microsystem Technologies, 38, 9, pp. 28-29, (2019)
[6] MASHAO G, RAMOHLOLA K E, MDLULI S B, Et al., Zinc-based zeolitic benzimidazolate framework/polyaniline nanocomposite for electrochemical sensing of hydrogen gas, Materials Chemistry and Physics, 230, pp. 287-298, (2019)
[7] JANG B, LEE K Y, NOH J S, Et al., Nanogap-based electrical hydrogen sensors fabricated from Pd-PMMA hybrid thin films, Sensors and Actuators B: Chemical, 193, pp. 530-535, (2014)
[8] HASSAN K, IFTEKHAR UDDIN A S M, CHUNG G S., Fast-response hydrogen sensors based on discrete Pt/Pd bimetallic ultra-thin films, Sensors and Actuators B: Chemical, 234, pp. 435-445, (2016)
[9] KUMAR M, KUMAR A, GAUTAM Y K, Et al., Influence of SiC thin films thickness on the electrical properties of Pd/SiC thin films for hydrogen gas sensor, Vacuum, 182, (2020)
[10] POOLE Z L, OHODNICKI P R, YAN A D, Et al., Potential to detect hydrogen concentration gradients with palladium infused mesoporous-titania on D-shaped optical fiber, ACS Sensors, 2, 1, pp. 87-91, (2017)

← 1 2 3 →