Chem. J. Chinese Universities ›› 2016, Vol. 37 ›› Issue (11): 2025.doi: 10.7503/cjcu20160390
• Physical Chemistry • Previous Articles Next Articles
LI Chuanxian, SHI Enhua, YANG Shuang, YAO Bo, YANG Fei*(), YAN Qun
Received:
2016-05-30
Online:
2016-11-10
Published:
2016-10-20
Contact:
YANG Fei
E-mail:yf9712220@sina.com
CLC Number:
TrendMD:
LI Chuanxian, SHI Enhua, YANG Shuang, YAO Bo, YANG Fei, YAN Qun. Synthesis and Anti-corrosion Properties of Polyaniline/Polypyrrole-nano Silicon Dioxide Composite Membrane†[J]. Chem. J. Chinese Universities, 2016, 37(11): 2025.
Membrane | Atomic fraction(%) | |||
---|---|---|---|---|
—NH— | N+ | —NH+ | —N | |
PAni | 16 | 61 | 23 | |
PPy | 63 | 27 | ||
PAni/PPy | 34 | 40 | 16 | 10 |
Table 1 Components of N1s according to binding energy data from XPS
Membrane | Atomic fraction(%) | |||
---|---|---|---|---|
—NH— | N+ | —NH+ | —N | |
PAni | 16 | 61 | 23 | |
PPy | 63 | 27 | ||
PAni/PPy | 34 | 40 | 16 | 10 |
Fig.5 SEM images of PAni(A), PPy(B), PAni/PPy(C) and PAni/PPy-SiO2(D—F) with different SiO2 contents (D) PAni/PPy-SiO2(20∶1); (E) PAni/PPy-SiO2(10∶1); (F) PAni/PPy-SiO2(20∶3).
Fig.7 Tafel curves for 316SS/PAni/PPy-SiO2 electrodes with different SiO2 contents in 3.5% NaCl solution a. PAni/PPy-SiO2(20∶1); b. PAni/PPy-SiO2(40∶3); c. PAni/PPy-SiO2(10∶1); d. PAni/PPy-SiO2(40∶5); e. PAni/PPy-SiO2(20∶3).
Membrane | Ecorr/V | icorr/(A·cm-2) |
---|---|---|
Bare 316SS | -0.34 | 2.827×10-4 |
PAni | -0.17 | 6.723×10-5 |
PAni/PPy | -0.03 | 1.891×10-5 |
PAni/PPy-SiO2(20∶1) | 0.09 | 4.761×10-6 |
PAni/PPy-SiO2(40∶3) | 0.108 | 3.517×10-6 |
PAni/PPy-SiO2(10∶1) | 0.122 | 2.748×10-6 |
PAni/PPy-SiO2(40∶5) | 0.115 | 3.138×10-6 |
PAni/PPy-SiO2(20∶3) | 0.104 | 3.635×10-6 |
Table 2 Ecorr and icorr in accordance with Tafel curves of different membranes on 316SS
Membrane | Ecorr/V | icorr/(A·cm-2) |
---|---|---|
Bare 316SS | -0.34 | 2.827×10-4 |
PAni | -0.17 | 6.723×10-5 |
PAni/PPy | -0.03 | 1.891×10-5 |
PAni/PPy-SiO2(20∶1) | 0.09 | 4.761×10-6 |
PAni/PPy-SiO2(40∶3) | 0.108 | 3.517×10-6 |
PAni/PPy-SiO2(10∶1) | 0.122 | 2.748×10-6 |
PAni/PPy-SiO2(40∶5) | 0.115 | 3.138×10-6 |
PAni/PPy-SiO2(20∶3) | 0.104 | 3.635×10-6 |
Fig.9 EIS spectra for 316SS/PAni/PPy-SiO2 electrodes with different SiO2 contents in 3.5% NaCl Solution a. PAni/PPy-SiO2(20∶1); b. PAni/PPy-SiO2(40∶3); c. PAni/PPy-SiO2(10∶1); d. PAni/PPy-SiO2(40∶5); e. PAni/PPy-SiO2(20∶3).
Membrane | Rs/(Ω·cm2) | Cc/(F·cm-2) | n1 | Rc/(Ω·cm2) | Cdl/(F·cm-2) | n2 | Rct/(Ω·cm2) |
---|---|---|---|---|---|---|---|
PAni | 8.25 | 0.00041086 | 0.77961 | 136.5 | 0.0039012 | 0.76774 | 605.6 |
PAni/PPy | 9.27 | 0.00027486 | 0.81575 | 169.2 | 0.0028021 | 0.75622 | 1029.3 |
PAni/PPy-SiO2(20∶1) | 10.64 | 0.00020994 | 0.85938 | 202.3 | 0.0020668 | 0.82984 | 1512.8 |
PAni/PPy-SiO2(40∶3) | 10.29 | 0.00015672 | 0.86344 | 245.6 | 0.0014717 | 0.81137 | 1773.4 |
PAni/PPy-SiO2(10∶1) | 8.50 | 0.00012482 | 0.84834 | 296.3 | 0.0010392 | 0.85789 | 1905.2 |
PAni/PPy-SiO2(40∶5) | 7.62 | 0.00013026 | 0.87125 | 261.7 | 0.0012971 | 0.83695 | 1835.7 |
PAni/PPy-SiO2(20∶3) | 9.01 | 0.00018267 | 0.89767 | 214.8 | 0.0017236 | 0.84891 | 1623.1 |
Table 3 EIS fitting parameters of different membranes on 316SS
Membrane | Rs/(Ω·cm2) | Cc/(F·cm-2) | n1 | Rc/(Ω·cm2) | Cdl/(F·cm-2) | n2 | Rct/(Ω·cm2) |
---|---|---|---|---|---|---|---|
PAni | 8.25 | 0.00041086 | 0.77961 | 136.5 | 0.0039012 | 0.76774 | 605.6 |
PAni/PPy | 9.27 | 0.00027486 | 0.81575 | 169.2 | 0.0028021 | 0.75622 | 1029.3 |
PAni/PPy-SiO2(20∶1) | 10.64 | 0.00020994 | 0.85938 | 202.3 | 0.0020668 | 0.82984 | 1512.8 |
PAni/PPy-SiO2(40∶3) | 10.29 | 0.00015672 | 0.86344 | 245.6 | 0.0014717 | 0.81137 | 1773.4 |
PAni/PPy-SiO2(10∶1) | 8.50 | 0.00012482 | 0.84834 | 296.3 | 0.0010392 | 0.85789 | 1905.2 |
PAni/PPy-SiO2(40∶5) | 7.62 | 0.00013026 | 0.87125 | 261.7 | 0.0012971 | 0.83695 | 1835.7 |
PAni/PPy-SiO2(20∶3) | 9.01 | 0.00018267 | 0.89767 | 214.8 | 0.0017236 | 0.84891 | 1623.1 |
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