TY - JOUR
T1 - Reverse microemulsion in situ crystallizing growth of ZnO nanorods and application for NO2 sensor
AU - Bai, Shouli
AU - Chen, Liangyuan
AU - Chen, Song
AU - Luo, Ruixian
AU - Li, Dianqing
AU - Chen, Aifan
AU - Liu, Chung Chiun
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51072014 , 21177007 and 51372013 ), Beijing Natural Science Foundation (Grant No. 8112022 ) and Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis .
PY - 2014
Y1 - 2014
N2 - One-dimensional ZnO nanorods with needle-like morphology have been synthesized by a reverse microemulsion in situ crystallizing process. Pseudo-ternary phase diagrams in quaternary component systems of sodium dodecyl sulphate/n-hexanol/n-heptane/water were presented to select the appropriate reaction conditions, and studied the effect of alcohol chain length, surfactant/co-surfactant ratio and temperature on microemulsion stability. The crystal structure, morphology and size of obtained products have been characterized by XRD, FE-SEM and HR-TEM. The results show the ZnO nanorods have a hexagonal wurtzite structure with an aspect ratio (length/diameter) over 57. The sensing test results show that the nanoneedles exhibits high response and selectivity to NO2 in the presence of CO and CH4 at optimum operating temperature of 120 C, which results from its high aspect ratio, well dispersion and high crystallinity. The response is further enhanced by loading of Pd, which can be attributed to electronic and chemical sensitization effect.
AB - One-dimensional ZnO nanorods with needle-like morphology have been synthesized by a reverse microemulsion in situ crystallizing process. Pseudo-ternary phase diagrams in quaternary component systems of sodium dodecyl sulphate/n-hexanol/n-heptane/water were presented to select the appropriate reaction conditions, and studied the effect of alcohol chain length, surfactant/co-surfactant ratio and temperature on microemulsion stability. The crystal structure, morphology and size of obtained products have been characterized by XRD, FE-SEM and HR-TEM. The results show the ZnO nanorods have a hexagonal wurtzite structure with an aspect ratio (length/diameter) over 57. The sensing test results show that the nanoneedles exhibits high response and selectivity to NO2 in the presence of CO and CH4 at optimum operating temperature of 120 C, which results from its high aspect ratio, well dispersion and high crystallinity. The response is further enhanced by loading of Pd, which can be attributed to electronic and chemical sensitization effect.
KW - Microemulsion system
KW - NO sensor
KW - One-dimensional nanostructures
KW - ZnO nanorods
UR - http://www.scopus.com/inward/record.url?scp=84885610350&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2013.09.032
DO - 10.1016/j.snb.2013.09.032
M3 - 期刊論文
AN - SCOPUS:84885610350
SN - 0925-4005
VL - 190
SP - 760
EP - 767
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -