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首页> 外文期刊>Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications >Electrocatalytic reduction of chromium by poly(aniline-co-o-aminophenol): An efficient and recyclable way to remove Cr(VI) in wastewater
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Electrocatalytic reduction of chromium by poly(aniline-co-o-aminophenol): An efficient and recyclable way to remove Cr(VI) in wastewater

机译：聚（苯胺-共-邻-氨基苯酚）电催化还原铬：一种有效且可回收的去除废水中六价铬的方法

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摘要

Poly(aniline-co-o-aminophenol) (PANOA)-modified glassy carbon electrode (GCE) was first used to investigate the electrocatalytic reduction of dichromate in a NaCl solution of pH 5.0. The results of cyclic voltammograms and UV-vis spectra demonstrated that the reduction of Cr(VI) occurred at PANOA-modified GCE. The FT-IR, ESR and XPS results showed that the Cr(VI) can be doped in the PANOA films and can convert to less-toxic Cr(III). The doping level Cr/N was 78.2% and trace amount of Cl (0.42%) was detected in the doped PANOA, which indicated that the doping process is effective and PANOA had rather good ion selectivity in the 0.10 M NaCl supporting electrolyte. The factors influenced the reduction were also considered. Various initial concentrations of Cr(VI) had different removal rates. The maximum removal rate of Cr(VI) at 20 mg L~(-1) (32.3%) was better than that of at 5 mg L~(-1) (22.9%). The solution pH had little effect on Cr(VI) reduction and doping process of the PANOA because PANOA had good electrochemical activity and stability in a wide range of pHs (from pH 4 to pH 8).
机译：聚苯胺-邻氨基苯酚（PANOA）修饰的玻碳电极（GCE）首先用于研究pH 5.0的NaCl溶液中重铬酸盐的电催化还原。循环伏安图和紫外可见光谱的结果表明，Cr（VI）的还原发生在PANOA修饰的GCE上。 FT-IR，ESR和XPS结果表明，Cr（VI）可以掺杂在PANOA薄膜中，并且可以转化为毒性较小的Cr（III）。掺杂的Cr / N为78.2％，在掺杂的PANOA中检测到痕量的Cl（0.42％），这表明掺杂过程是有效的，并且PANOA在0.10 M NaCl辅助电解质中具有相当好的离子选择性。还考虑了影响减少的因素。各种初始浓度的Cr（VI）具有不同的去除率。 20 mg L〜（-1）（32.3％）对Cr（VI）的最大去除率好于5 mg L〜（-1）（22.9％）。溶液的pH值对PANOA的Cr（VI）还原和掺杂过程影响很小，因为PANOA在宽范围的pH值（从pH 4到pH 8）中都具有良好的电化学活性和稳定性。

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