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以4,4′-二苯醚二甲酸和4,4′-联吡啶为配体,通过调节水热反应的条件,如三乙胺的加入量,反应时间和反应温度等因素,可控合成了尺寸从10到250μm的Ni(Ⅱ)、Co(Ⅱ)和Zn(Ⅱ)3种配合物微晶,其尺寸、形貌和结构用扫描电镜和X射线粉末衍射进行了表征和分析。光催化性能测试表明3种配合物对有机染料罗丹明B、甲基橙和亚甲基蓝均具有杰出的降解能力,且随着配合物晶粒尺寸减小其催化能力明显提高。最引人注目的是尺寸为30μm的Ni(Ⅱ)配合物,其光催化性降解Rh B染料的能力已超越纳米TiO_2。此外,X射线粉末衍射表明,在一次光降解过程后配合物结构保持稳定,可作为重复利用的光催化剂。
With 4,4’-diphenyl ether dicarboxylic acid and 4,4’-bipyridine as ligand, by adjusting the hydrothermal reaction conditions, such as the amount of triethylamine, reaction time and reaction temperature and other factors, controllable synthesis The sizes, morphologies and structures of three kinds of Ni (Ⅱ), Co (Ⅱ) and Zn (Ⅱ) crystallites with size ranging from 10 to 250 μm were characterized and analyzed by scanning electron microscopy and X-ray powder diffraction. The results of photocatalytic activity show that the three complexes have excellent degradation ability for organic dyes rhodamine B, methyl orange and methylene blue, and their catalytic ability increases obviously with the decrease of crystal size. Most notable is Ni (II) complexes of 30 [mu] m in size whose photocatalytic capacity to degrade Rh B dyes has surpassed that of nano-TiO 2. In addition, X-ray powder diffraction showed that the complex structure remained stable after a photodegradation process and could be used as a photocatalyst for reuse.