磷酸锆镍的微波制备及其可见光光催化性能

以氧氯化锆、氯化镍和磷酸二氢钠为原料,在较低温度和常压条件下采用微波辅助法制备具有特殊形貌的磷酸锆镍NiZr(PO_4)_2·4H_2O。研究了3种不同种类的表面活性剂对磷酸锆镍的物相、尺寸及形貌的影响。结果表明,表面活性剂的引入可以降低磷酸锆镍颗粒的平均粒径。与十二烷基硫酸钠(SDS)相比,聚乙烯吡咯烷酮K30(PVP-K30)和十六烷基三甲基溴化铵(CTAB)对颗粒生长的抑制程度更大,从而产物的平均粒径更小。使用亚甲基蓝(MB)溶液模拟印染废水,对磷酸锆镍的光催化降解性能进行了探讨。结果表明,可见光下以PVP-K30为模板制备的磷酸锆镍对MB的表观脱色率为49.0%,优于CTAB和SDS条件下制备的磷酸锆镍。本文为新型磷酸锆类复盐的制备与应用研究提供了新的思路和方法。

Microwave-assisted Preparation and the Visible-light Photocatalytic Properties of Nickel Zirconium Phosphate

ZrOCl₂, NiCl₂ and NaH₂PO₄ were used as raw materials to prepare nickel zirconium phosphate(NiZr(PO₄)₂·4H₂O, NiZrPs) by a microwave-assisted method at lower temperature and atmospheric pressure. The influence of three different kinds of surfactants on the phase, particle size and morphology of NiZrPs was studied. The results show that the addition of surfactant can reduce the particle size. Compared with sodium dodecyl sulfate(SDS), polyvinylpyrrolidone K30(PVP-K30) and hexadecyltrimethyl ammonium bromide(CTAB) can restrain the growth of particles more efficiently, resulting in a smaller average particle size. Moreover, the visible-light photocatalytic property of NiZrPs was studied based on methylene blue(MB) as a simulated wastewater. As a result, the visible-light apparent dye decolorization efficiency of NiZrP prepared with PVP-K30 is 49.0% which is much higher than that of the other two products. This work developed a new method for the preparation and application of new type zirconium phosphate complex salt.