镍掺杂锆柱撑钛酸盐的制备、表征与光催化性能

Preparation,Characterization and Photocatalytic Activity of Nickel-doping Hydroxyl-Zr Pillared Titanate

采用高温固相加水热合成方法制备出钛酸盐单分子层。掺镍的聚合羟基锆离子溶液与钛酸盐单分子层悬浮液共混,通过剥离重堆积技术制得镍掺杂锆柱撑钛酸盐材料(NZPT)。用X射线衍射(XRD)、N2吸附分析、扫描/透射电镜(SEM/HR-TEM)和紫外可见吸收光谱(UV-vis)对材料晶体结构、化学组成、微观形貌和孔结构等性质进行表征。以紫外-可见光催化降解酸性红G作为探针反应考察镍的掺入对Zr柱撑钛酸盐复合材料(ZPT)光催化活性的影响。结果表明:掺镍柱撑材料的催化活性均高于未掺镍ZPT,其中,NZPT-0.10呈现出最佳的催化活性,这与材料掺杂后形成的更大比表面积以及主客体间的电子耦合有关。

A single layer of titanate was prepared by high temperature solid phase hydrothermal syn-thesis. To fabricate mesoporous nanocomposite-Ni-doped Zr-pillared titanate（NZPT）,the exfoliated layered titanate in aqueous solution was reassembled in the presence of the hydroxyl-Zr oligocations and nickel cation by exfoliation-restacking technology. The crystal structure, chemical composition, microstructure and pore structure were characterized by powder X-ray diffraction, N2 asbsorption analysis, scanning electron microscope/transmission electron microscopy and UV-vis spectra. The in-fluence of doping Ni cations on the catalytic activity of the Zr-pillared composites （ZPT） was investi-gated by the degradation of acid red G under ultraviolet and visible radiation. The results show that the Ni-containing pillared nanocomposite exhibits higher photocatalytic activities than that of ZPT without doping Ni cations, and the NZPT-0. 10 has the best photocatalytic activities of them, which are based on the bigger specific surface area and electronic coupling between the host and the guest species.