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由基体提供镍源,采用原位生长法在泡沫镍表面获得镍铝水滑石薄膜后,经400℃焙烧得到了镍铝混合氧化物薄膜。X射线衍射(XRD)、元素分析、傅里叶变换红外光谱(FT-IR)和扫描电子显微(SEM)表征表明在泡沫镍表面获得了致密的镍铝镍铝水滑石薄膜。将进一步热处理得到的镍铝复合氧化物薄膜用作电极电吸附水溶液中的S_2O_3~(2-),在静态电吸附条件下,S_2O_3~(2-)的吸附率可达10%以上,吸附容量约为0.056 mg/cm~2;经5个电吸附及脱附循环,电吸附率下降不明显,单次脱附率可达89%以上。研究表明,该电极可应用于工业废水中S_2O_3~(2-)的脱除和回收。
Nickel source was provided by the substrate. After in-situ growth method, nickel-aluminum hydrotalcite film was obtained on the surface of nickel foam, and then calcined at 400 ℃ to obtain Ni-Al mixed oxide film. X-ray diffraction (XRD), elemental analysis, Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) characterization showed that the dense NiAlAl hydrotalcite films were obtained on the surface of the foam nickel. The nickel-aluminum composite oxide film obtained by further heat treatment was used as S_2O_3 ~ (2-) in the electrode electrosorption aqueous solution. Under the condition of static electrosorption, the adsorption rate of S_2O_3 ~ (2-) was more than 10%. The adsorption capacity About 0.056 mg / cm ~ 2. After 5 cycles of electrosorption and desorption, the electrosorption rate did not decrease obviously, and the single desorption rate reached more than 89%. Studies have shown that the electrode can be applied to the removal and recovery of S_2O_3 ~ (2-) in industrial wastewater.