摘要
通过共沉淀-离子交换法制备不同的层板二价金属(Cu/Ni/Co/Mg)与三价金属(Al)组成的二元或多元LDH-PDS,考察金属组成对LDH-PDS复合材料氧化性能的影响。结果表明,含不同二价金属的多元LDH-PDS复合材料对PhOH的氧化性能由高到低的顺序依次为Cu≈Ni>Mg>Co,4 h时PhOH的去除率分别为95%、88.2%、83.8%和14.3%。含Cu和Ni的LDH的较强氧化能力分别来源于八面体Cu复合盐和过渡金属Ni对PDS的活化。由于层板金属对层间阴离子的作用力较弱,含Co的LDH的氧化能力较弱,同时,Co的过度引入影响材料的催化性能。
Co-precipitation-ion exchange method was used to prepare binary or multi-component LDH-PDS composed of different laminates of divalent metals(Cu/Ni/Co/Mg)and trivalent metals(Al).Effect of metal composition on oxidative properties of multi-component LDH-PDS composites was investigated.Results showed that the order of oxidation of PhOH from multi-component LDH-PDS composites containing different divalent metals from high to low was Cu≈Ni>Mg>Co,and removal rates of PhOH at 4 h were 95%,88.2%,83.8%and 14.3%,respectively.The stronger oxidizing ability of LDH containing Cu and Ni came from the activation of PDS by octahedral Cu composite salt and transition metal nickel,respectively.The weaker oxidation ability of co-containing LDH was due to the weaker force of layer metal on interlayer anions,and excessive introduction of Co would affect catalytic performance of the material.
作者
张国芳
ZHANG Guofang(Shanghai Chengtou Water Affairs<Group>Co.,Ltd.,Shanghai 200020,China)
出处
《净水技术》
CAS
2020年第7期126-129,154,共5页
Water Purification Technology
关键词
层板金属
层状双金属氢氧化物
氧化性能
laminated metal
layered double hydroxide
oxidation performance
