Adsorption of Zirconium−Phosphonate Multilayers onto Phosphate-Derivatized Glassy Carbon Substrates
Adsorption of Zirconium−Phosphonate Multilayers onto Phosphate-Derivatized Glassy Carbon Substrates
复制标题
磷酸盐衍生玻碳基底上锆-磷酸盐多层膜的吸附
DOI：
10.1021/cm960147i
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发表时间：
1996
影响因子：
8.6
通讯作者：
T. Bein
中科院分区：
文献类型：
--
作者：
K. Hoekstra;T. Bein
发展了两种用磷酸基团修饰玻碳表面的方法。在第一种方法中，磷酰氯直接与玻碳表面的氧化物反应。X射线光电子能谱表明，氧化和还原处理提高了抛光表面的磷酸盐位密度。在第二种方法中，在磷酸化之前，用ω-氨基醇通过电化学氧化对碳表面进行修饰，得到类似的磷酸盐中心密度。在这些改性的玻碳衬底上沉积了1，10-十一烷基双(膦)酸锆多层膜。可变起飞角度的X射线光电子能谱研究和每种金属−磷酸盐沉积对锆和磷的稳定增加表明每种多层膜都有规则的吸附。高出理想的锆磷比归因于沉积动力学、信号衰减和玻碳表面的随机特性。ZR-−-DBP层呈椭圆体。
Two methods were developed to modify glassy carbon surfaces with phosphoric acid groups. In the first method, phosphoryl chloride was reacted directly with oxides on the glassy carbon surface. Oxidative and reductive pretreatment of the polished surface improved the phosphate site density, as determined by X-ray photoelectron spectroscopy. In the second method, the carbon surface was modified with an ω-aminoalcohol by electrochemical oxidation, prior to phosphorylation, yielding similiar phosphate site densities. Zirconium 1,10-decanediylbis(phosphonic acid) (Zr-DBP) multilayers were deposited upon these modified glassy carbon substrates. Variable takeoff angle XPS studies and the steady increase of zirconium and of phosphorus with each metal−phosphonate deposition indicate regular adsorption of each multilayer. Higher than ideal zirconium-to-phosphorus ratios are attributed to deposition kinetics, signal attenuation, and the random character of the glassy carbon surface. Zr−DBP layers exhibited ellipsome...