十二烷基苯磺酸掺杂聚吡咯在阳极-阴极交替极化下的防污性能

doi:10.7503/cjcu20190371

摘要/Abstract

摘要：

采用化学氧化聚合法合成了一系列十二烷基苯磺酸掺杂的聚吡咯(PPy-DBSA), 并研究了其电化学防污性能. 循环伏安(CV)曲线表明, PPy-DBSA在天然海水中具有良好的电化学活性和稳定性. 采用循环伏安扫描方法实现阳极极化和阴极极化交替进行, 并对极化后的PPy-DBSA电极进行了抑菌性能研究, 发现PPy-DBSA在循环伏安阳极-阴极交替(-1.0~2.0 V vs. SCE)极化下, 可成功抑制微生物(大肠杆菌)的附着, 其中在-0.6~0.8 V范围内循环伏安阳极-阴极交替极化20 min时防污效果最佳, 抑菌率可达99.8%, 明显优于恒电位阳极极化和恒电位阴极极化的结果.

关键词: 十二烷基苯磺酸掺杂聚吡咯, 电化学防污, 循环伏安, 阳极-阴极交替极化

Abstract:

Dodecyl benzene sulfonic acid doped polypyrrole(PPy-DBSA) samples were synthesized by oxidative chemical polymerization, and their electrochemical antifouling performances were studied. Cyclic voltammetry(CV) curve showed that PPy-DBSA had excellent electrochemical activity and stability in natural seawater. The antimicrobial activity of PPy-DBSA under alternating anodic-cathodic polarization was verified by CV curve. It was found that the adhesion of microorganisms(E. coli) to PPy-DBSA electrode was efficiently inhibited by cyclic voltammetry scanning(-1.0—2.0 V vs. SCE) under alternating anodic-cathodic polarization. The inhibition rate could reach 99.8% after alternating anodic-cathodic polarization between -0.6 V and 0.8 V for 20 min, which is superior to that under pure anodic polarization and pure cathodic polarization.

Key words: Dodecyl benzene sulfonic acid doped polypyrrole(PPy-DBSA), Electrochemical antifouling, Cyclic voltammetry, Alternating anodic-cathodic polarization

中图分类号:

O633
O626.13

TrendMD:

张珈漪,贾梦洋,姜晓辉,张志明,于良民,王璇. 十二烷基苯磺酸掺杂聚吡咯在阳极-阴极交替极化下的防污性能. 高等学校化学学报, 2019, 40(11): 2396.

ZHANG Jiayi,JIA Mengyang,JIANG Xiaohui,ZHANG Zhiming,YU Liangmin,WANG Xuan. Antifouling Properties of Dodecyl Benzene Sulfonic Acid Doped Polypyrrole Under Alternating Anodic-cathodic Polarization ^†. Chem. J. Chinese Universities, 2019, 40(11): 2396.

图/表 10

Fig.1 Structure diagram of PPy-DBSA electrode

Fig.2 XRD patterns of different PPy-DBSA samples a. PPy-DBSA-0.1; b. PPy-DBSA-0.3; c. PPy-DBSA-0.5; d. PPy-DBSA-1.0; e. PPy-DBSA-2.0.

Fig.3 FTIR spectra of different PPy-DBSA samples a. PPy-DBSA-0.1; b. PPy-DBSA-0.3; c. PPy-DBSA-0.5; d. PPy-DBSA-1.0; e. PPy-DBSA-2.0.

Fig.4 CV curves of different PPy-DBSA samples (A) PPy-DBSA-0.1; (B) PPy-DBSA-0.3; (C) PPy-DBSA-0.5; (D) PPy-DBSA-1.0; (E) PPy-DBSA-2.0. Scan rate: 100 mV/s.

Fig.5 Current capacity percentage of different PPy-DBSA in natural seawater after cyclic voltammetry scan(-1.0—2.0 V) and the open circuit potentials(B) of PPy-DBSA-0.5 electrode in natural seawater(pH=8.0) a. PPy-DBSA-0.1; b. PPy-DBSA-0.3; c. PPy-DBSA-0.5; d. PPy-DBSA-1.0; e. PPy-DBSA-2.0.

Fig.6 Current capacity percentage of PPy-DBSA-0.5 in natural seawater after cyclic voltammetry scan with different scan range a. -1.0—2.0 V; b. -1.0—-0.091 V; c. -0.091—2.0 V.

Fig.7 Photographs of polarized seawater tested with residual chlorine test kit after CV scan within -1.0—2.0 V(vs. SCE) for 30 min using differen PPy-DBSA samples Scan rate: 100 mV/s. a. PPy-DBSA-0.1; b. PPy-DBSA-0.3; c. PPy-DBSA-0.5; d. PPy-DBSA-1; e. PPy-DBSA-2. f. standard colour card of residual chlorine concentration.

Fig.8 Photographs of E.coli incubated on agar plates from dilute solution collected from PPy-DBSA electrode after polarization under different potentials (A1—C1) Blank; (A2—C2) 0 V; (A3—C3) cathodic polarization(-0.6 V); (A4—C4) anodic polarization(+0.8 V); (A5—C5) CV(-0.6—0.6 V); (A6—C6) CV(-0.6—0.7 V); (A7—C7) -CV(-0.6—0.8 V); (A8—C8) CV(-0.6—1.0 V). (A1—A8) 10 min; (B1—B8) 15 min; (C1—C8) 20 min.

Table 1 Antimicrobial efficiency of PPy-DBSA-0.5 electrode

E/V(vs. SCE)	t/min			E/V(vs. SCE)	t/min
E/V(vs. SCE)	10	15	20	E/V(vs. SCE)	10	15	20
Blank	0	0	0	-0.6~0.6	90.1%	91.9%	97.5%
0	31.2%	41.6%	43.2%	-0.6~0.7	92.3%	94.1%	98.6%
-0.6	88.8%	90.9%	91.9%	-0.6~0.8	94.7%	96.7%	99.8%
+0.6	82.5%	87.5%	87.6%	-0.6~1.0	94.1%	96.3%	99.0%
+0.8	89.8%	91.5%	96.4%

Fig.9 LSV curve for PPy-DBSA-0.5 electrode in 0.21 mol/L Na2SO4(pH=8.0) Scan rate: 0.5 mV/s.

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