Abstract

Ultrafine NiAl₂O₄ nanoparticles were prepared by simple one-pot chemical precipitation route. The precursor materials used were nickel nitrate hexahydrate and aluminum nitrate nonahydrate (as the basic materials) and sodium hydroxide (as a precipitator material). In a typical experiment, aqueous nitrate solutions were added drop wise to the alkaline solution in a magnetic stirrer under stirring. The resultant dark green colored precipitate was washed with water/ethyl alcohol (1:1 v/v) and dried. Finally, the sample was heat treated at 800 °C for 3 h in order to get the phase pure product. The prepared NiAl₂O₄ nanoparticles were characterized by XRD, FTIR, particle size analysis, SEM and UV. The band gap energy (E_g) of NiAl₂O₄ was found to be 3.05 eV. The photocatalytic degradation of malachite green and methylene blue over NiAl₂O₄ under visible light was carried out and the obtained results were discussed in this article.

摘要

通过简单的一锅化学沉淀法制备了超细NiAl ₂ O ₄纳米颗粒。所用的前体材料是六水合硝酸镍和九水合硝酸铝（作为基础材料）和氢氧化钠（作为沉淀剂材料）。在典型的实验中，在磁力搅拌器中在搅拌下将硝酸水溶液滴加到碱性溶液中。将得到的深绿色沉淀物用水/乙醇（1：1 v / v）洗涤并干燥。最后，将样品在800°C下热处理3 h​​，以获得纯相产品。通过XRD，FTIR，粒度分析，SEM和UV对制备的NiAl ₂ O ₄纳米颗粒进行了表征。带隙能量（E_发现g）的NiAl ₂ O ₄为3.05eV。本文对NiAl ₂ O ₄在可见光下光催化降解孔雀石绿和亚甲基蓝进行了探讨。