The preparation of PbO2 coatings on reticulated vitreous carbon for the electro-oxidation of organic pollutants
The preparation of PbO2 coatings on reticulated vitreous carbon for the electro-oxidation of organic pollutants
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网状玻璃炭上PbO2涂层的制备用于有机污染物的电氧化
DOI：
10.1016/j.electacta.2011.03.054
复制
发表时间：
2011
影响因子：
6.6
通讯作者：
Recio F
中科院分区：
文献类型：
--
作者：
Recio F
在含有Pb（II）和甲基磺酸（MSA，CH 3SO 3 H）的电解槽中，以恒电流法在网状玻璃碳（RVC）上制备PbO 2涂层。通过扫描电子显微镜（SEM）和X射线衍射对RVC/PbO 2沉积物的形貌和结构进行了分析，结果表明，可以成功地形成厚（100 μm）、均匀、纳米结构的β-PbO 2薄膜。结果，获得了三维β-PbO 2结构，特别令人感兴趣的是它们作为阳极在废水处理中的应用。通过对甲基橙子水溶液的电氧化实验，证实了这种阳极的高氧化能力。实现快速脱色，在600 mA下，由于在高阳极电位下水的氧化产生大量的反应性自由基dotOH自由基，在不到60分钟内完全脱色。从总有机碳（TOC）去除中也确定了溶液的逐步矿化，这在较高的施加电流下快得多。所有涂覆的RVC电极都表现出优异的长期稳定性，并且在长时间电解后保持不变。此外，在水热合成的钛酸盐纳米管（TiNT）的存在下，制备新型PbO 2复合涂层。SEM图像显示TiNT团聚体沿着PbO 2表面的存在下，这导致较高的阳极电流进行的循环伏安与甲基橙子溶液。这表明，TiNT有利于吸附的有机分子，促进与自由基dotOH自由基的接触，从而加速电氧化过程。这通过与RVC/PbO 2产生的TOC去除相比更快的TOC去除来证实，在120分钟时为45%而不是24%。
The preparation of PbO2coatings on reticulated vitreous carbon (RVC) has been carried out at constant current from electrolytic baths containing aqueous Pb(II) and methanesulfonic acid (MSA, CH3SO3H). The morphological and structural analysis of the RVC/PbO2deposits carried out by scanning electron microscopy (SEM) and X-ray diffraction revealed that a thick (100 μm), homogeneous, nanostructured β-PbO2film can be successfully formed. As a result, three-dimensional β-PbO2structures were obtained, being particularly interesting for their use as anodes in wastewater treatment. The high oxidation ability of these anodes has been verified by the electro-oxidation of Methyl Orange aqueous solutions. Quick decolourisation was achieved, with total colour removal in less than 60 min at 600 mA due to the production of large amounts of reactive radical dotOH radicals from the oxidation of water at high anodic potentials. The progressive mineralisation of the solutions was also ascertained from the total organic carbon (TOC) removal, which was much quicker at a higher applied current. All the coated RVC electrodes exhibited excellent long-term stability and remained unaltered after prolonged electrolyses. In addition, novel PbO2composite coatings were prepared in the presence of hydrothermally synthesized titanate nanotubes (TiNT). The SEM images showed the presence of TiNT agglomerates along the PbO2surface, which led to higher anodic current in the cyclic voltammetries carried out with Methyl Orange solutions. It is suggested that TiNT favour the adsorption of the organic molecules, facilitating the contact with the radical dotOH radicals and thus accelerating the electro-oxidation process. This was confirmed by the faster TOC removal compared to that yielded by the RVC/PbO2, being 45% instead of 24% at 120 min.
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影响因子：
3.9
作者：
A. Velichenko;R. Amadelli;A. Benedetti;D. Girenko;S. Kovalyov;F. Danilov
通讯作者：
A. Velichenko;R. Amadelli;A. Benedetti;D. Girenko;S. Kovalyov;F. Danilov
影响因子：
6.6
作者：
Herrasti, P.;Kulak, A. N.;Walsh, F. C.
通讯作者：
Walsh, F. C.
氧化铅的稳定性和反应性
DOI：
--
发表时间：
1963
期刊：
影响因子：
--
作者：
P. Ruetschi;J. Sklarchuk;R. L. Angstadt
通讯作者：
R. L. Angstadt
α-和β-二氧化铅表面微观结构的扫描隧道显微镜研究
DOI：
--
发表时间：
1990
期刊：
影响因子：
--
作者：
B. Sexton;G. F. Cotterill;S. Fletcher;M. Horne
通讯作者：
M. Horne
影响因子：
3.9
作者：
Y. Mohd;D. Pletcher
通讯作者：
Y. Mohd;D. Pletcher