【摘要】 采用非稳态共沉淀方法制备了无定形的Ni/Al LDH纳米粒子,水热处理过程促进了无定形沉淀的结晶,从而得到稳定的六边片状Ni/Al LDH纳米粒子胶体分散体系。通过调整胶溶温度和胶溶时间控制Ni/Al LDH纳米粒子的形貌和尺寸,对比不同胶溶温度和胶溶时间下得到的样品,得出制备Ni/Al LDH纳米粒子的最佳条件为胶溶温度130℃,胶溶时间24 h。由于Ni/Al LDH纳米粒子独特的带电及结构性质,具有较好的吸附性能,可将其制作成固相萃取柱,实现纳米材料与样品前处理技术的有机结合,优化样品前处理技术。更多还原

【Abstract】 We prepared Ni /Al layered double hydroxide( LDH) nanoparticles by non-steady co-precipitation. Water heat treatment process accelerated the crystal of amorphous precipitation. We acquired stable hexagonal sheet Ni /Al LDH nanoparticle colloidal suspensions. We controlled the shape and size of Ni /Al LDH nanoparticles by adjusting peptization temperature and time. We further obtained the optimal peptization temperature of 130 ℃ and peptization time of 24 h for the preparation of Ni /Al LDH nanoparticles. Ni /Al LDH nanoparticles have better adsorption property because of their unique properties of net positive charge and structure and can be manufacured as a solid phase extraction adsorbent. This realizes the combination of nanocomposites with sample pretreatment technology and optimizes sample preprocessing technology.更多还原