共 48 条
Experimental and theoretical studies on noble metal decorated tin oxide flower-like nanorods with high ethanol sensing performance
被引:69
作者:
Kaneti, Yusuf V.
[1
]
Yue, Jeffrey
[2
]
Moriceau, Julien
[3
]
Chen, Chuyang
[1
]
Liu, Minsu
[4
]
Yuan, Yuan
[1
]
Jiang, Xuchuan
[4
]
Yu, Aibing
[1
,4
]
机构:
[1] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
[2] UCL, Dept Chem Engn, London WC1E 7JE, England
[3] Inst Natl Sci Appl, Dept Mat Sci & Engn, F-69621 Villeurbanne, France
[4] Monash Univ, Dept Chem Engn, Melbourne, Vic 3800, Australia
基金:
澳大利亚研究理事会;
关键词:
Tin oxide;
Gas sensing;
Nanorods;
Noble metals;
Molecular dynamics simulation;
SNO2;
NANOWIRES;
AB-INITIO;
HYDROTHERMAL SYNTHESIS;
MOLECULAR-DYNAMICS;
FORCE-FIELD;
GAS;
ADSORPTION;
SENSOR;
NANOSTRUCTURES;
SNO2(110);
D O I:
10.1016/j.snb.2015.04.136
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
This study reports a facile solvothermal method for the synthesis of tin oxide (SnO2) flower-like nanorods with dominant (1 1 0) crystal surface, which could be further decorated with varying amounts of noble metals, (gold (Au) and palladium (Pd)) to enhance the gas-sensing properties. Analysis of the gas-sensing results reveal that the decoration of Au and Pd nanoparticles on the surface of the SnO2 nanorods is advantageous in: (i) enhancing the sensitivity towards ethanol (9-15 times); (ii) reducing the response/recovery time (by 15-40s), and (iii) significantly decreasing the optimum operating temperature (from 250 to 175 degrees C). Beyond physical experiments, molecular dynamics (MD) method was also conducted to quantify diffusivity, adsorption and reaction capabilities of ethanol on SnO2(1 1 0) plane and to better understand the role of noble metals in enhancing the gas-sensing performance of SnO2. The findings in this study will be useful for future design of metal oxide nanocomposites with specific crystal surface for achieving high performance in surface-governed applications. (C) 2015 Elsevier B.V. All rights reserved.
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页码:83 / 93
页数:11
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