Preparation and Electrochemical Performance of 3D-nanohole PVA/a-MWCNTs Hydrogel Electrode Membrane†

doi:10.7503/cjcu20150743

Abstract

Abstract:

On the basis of moderate acidification of multiwalled carbon nanotubes(MWCNTs), polyvinyl alcohol(PVA)/a-MWCNTs hydrogel electrode membrane with three-dimensional nanohole was prepared by electrophoretic deposition technology and cycle freeze-thaw process. The electrode membrane has high electrical activity area, low surface charge transfer resistance, high hydrophilicity and low mass transport resistance. The electric catalytic reduction peaks of dopamine on the PVA/a-MWCNTs hydrogel membrane-modified electrode is not affected by ascorbic acid in cyclic voltammetry test. Dopamine can be determined by the feature of the electrode membrane in the presence of excessive ascorbic acid. The linear interval of dopamine concentration was 2×10^-6—2×10^-3 mol/L, the threshold of detection concentration can reach 10^-6 mol/L and the sensitivity can reach 12.3 μA/(mmol·L^-1). The electrode membrane also has good stability for dopamine detection.

Key words: Dopamine, Ascorbic acid, Carbon nanotube, Hydrogel, Electrophoretic deposition

CLC Number:

O647.2
O646

TrendMD:

LIU Shumin, ZHENG Yudong, LI Wei, SUN Yi, YUE Lina, ZHAO Zhenjiang. Preparation and Electrochemical Performance of 3D-nanohole PVA/a-MWCNTs Hydrogel Electrode Membrane^†[J]. Chem. J. Chinese Universities, 2016, 37(2): 290.

Figures/Tables 9

Fig.1 Schematic illustration of preparation of PVA/a-MWCNTs hydrogel electrode membrane

Fig.2 SEM images of PVA/a-MWCNTs hydrogel electrode membrane (A), (B) Surface image; (C) cross-section image.

Fig.3 Images of the static contact angle measurement (A) Copper sheet; (B) PVA/a-MWCNTs hydrogel electrode membrane.

Fig.4 Cyclic voltammogram curves of different electrodes in 1.0 mmol/L K3Fe(CN)6 PBS solution a. The copper sheet modified by PVA/a-MWCNTs hydrogel membrane; b. copper sheet. Scan rate: 100 mV/s.

Table 1 Parameters of cyclic voltammograms on different electrodes*

Electrode material	I_pa/(mA·cm^-2)	I_pc/(mA·cm^-2)	S/cm²	E_pa/mV	E_pc/mV	ΔE/mV
PVA/a-MWCNTs-modified copper sheet	1.692	1.486	1.824	640	541	99
Copper sheet	0.289	0.192	0.310	639	550	89

Fig.5 Electrochemical impedance spectroscopys of different electrodes a. Copper sheet modified by PVA/a-MWCNTs hydrogel membrane; b. copper sheet.

Fig.6 Cyclic voltammogram curves of PVA/a-MWCNTs hydrogel membrane-modified electrode in different systems a. PBS; b. PBS+DA(1 mmol/L); c. PBS+AA(2 mmol/L);d. PBS+DA(1 mmol/L)+AA(2 mmol/L).

Fig.7 Partial cyclic voltammogram curves of PVA/a-MWCNTs hydrogel membrane-modified electrode with 0.04 mol/L AA and different concentrations of DA c(DA)/(mmol·L-1) from a to g: 0.1, 0.2, 0.4, 0.6, 0.8, 1.0, 2.0.

Fig.8 Repeatability of the PVA/a-MWCNTs hydrogel membrane-modified electrode (A) Peak currents of the same electrode with different test times;(B) Peak currents of different electrodes with the same preparation process.

References 22

[1]	Redgrave P., Gurney K., Nature Reviews Neuroscience, 2006, 7, 967—975
[2]	Lim S. Y., O'Sullivan S. S., Kotschet K., Gallagher D. A., Lacey C., Lawrence A. D., Lees A. J., O'Sullivan D. J., Peppard R. F., Rodrigues J. P., J. Clin. Neuroscien., 2009, 16, 1148—1152
[3]	Rubí B., Maechler P., Endocrinology, 2010, 151, 5570—5578
[4]	Liu S. Q., Sun W. H., Hu F. T., Sensors and Actuators B: Chemical, 2012, 173, 497—504
[5]	Wang Z. H., Liu J., Yan L. S., Wang Y. M., Luo G. A., Chinese Journal of Analytical Chemistry, 2002, 30, 1053—1057
	(王宗花, 刘军, 颜流水, 王义明, 罗国安. 分析化学, 2002, 30, 1053—1057)
[6]	Alarcón-Angelesa G., Corona-Avendañob S., Palomar-Pardavéb M., Rojas-Hernándeza A., Romero-Romob M., Ramírez-Silvaa M. T., Electrochimica Acta, 2008, 53, 3013—3020
[7]	Suzuki A., Ivandini T. A., Yoshimi K., Fujishima A., Oyama G., Nakazato T., Hattori N., Kitazawa S., Einaga Y., Anal. Chem., 2007, 79, 8608—8615
[8]	Zhang J. L., Lan C. L., Shi B. F., Liu F., Zhao D. D., Tan X. C., Chem. Res. Chinese Universities, 2014, 30(6), 905—909
[9]	Bi H. Q., Li Y. H., Liu S. F., Guo P. Z., Wei Z. B., Lv C. X., Zhang J. Z., Zhao X. S., Sensors and Actuators B: Chemical, 2012, 171, 1132—1140
[10]	Wang M. W., Hsu T. C., Weng C. H., European Physical Journal Applied Physics, 2008, 42(3), 241—246
[11]	Łuczak T., Electrochimica Acta, 2008, 53, 5725—5731
[12]	Lin D.M., Che J. F.,Progress in Chemistry, 2010, 1195—1202
	(林德盟, 车剑飞. 化学进展, 2010, 1195—1202)
[13]	Wu K. B., Hu S. S., Microchimica Acta, 2004, 144, 131—137
[14]	Ardakani M. M., Beitollahi H., Ganjipour B., Nejati H. N., Bioelectrochemistry, 2009, 75, 1—8
[15]	Li Y. X., Lin X. Q., Li Y. X., Lin X. Q., Sensors and Actuators B Chemical, 2006, 115, 134—139
[16]	Huang Y. Y., Zheng Y. D., Song W. H., Ma Y. X., Wu J., Fan L. Z., Composites Part A Applied Science & Manufacturing, 2011, 42, 1398—1405
[17]	Fukada Y., Nagarajan N., Mekky W., Bao Y., Kim H. S., Nicholson P. S., J. Mater Sci., 2004, 39, 787—801
[18]	Gao S. Z., Chen J. D., Qi Q. Q., Shu R. D., Qiu Z. P., Ren J. Z., Chem. J. Chinese Universities, 2011, 32(10), 2437—2440
	(高素照, 陈际达, 亓倩倩, 舒荣德, 邱智萍, 任竞争. 高等学校化学学报, 2011, 32(10), 2437—2440)
[19]	Wu X. Y., Huang S. W., Zhang J. T., Zhuo R. X., Chem. J. Chinese Universities, 2004, 25(2), 382—384
	(武旭业, 黄世文, 张建涛, 卓仁禧. 高等学校化学学报, 2004, 25(2), 382—384)
[20]	Robert N. W., Ind. Eng. Chem., 1936, 28, 988—994
[21]	Yang G. F., Jia N. Q., Wang Z. Y., Journal of Electrochemistry, 2007, 13, 63—65
	(杨国锋, 贾能勤, 王志勇. 电化学, 2007, 13, 63—65)
[22]	Yuan L., Yang M. H., Qu F. L., Shen G. L., Yu R. Q., Electrochimica Acta, 2008, 53, 3559—3565