| 用纤维素分散ZnAl-LDHs纳米片提高磷吸附性能 |
| Dispersion of ZnAl-LDHs Nanosheets by Cellulose to Improve Adsorption Capacity toward Phosphate |
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| 摘要: 为了利用大比表面积性质,将锌铝层状双金属氢氧化物(ZnAl-LDHs)在甲酰胺中剥离,所得纳米片由纤维素稳定即在水溶液中不发生配列。通过XRD、FTIR、SEM、TEM、元素分析、ICP和离子色谱等手段研究了ZnAl-LDHs纳米片与羧甲基纤维素复合体的结构、组成和形貌,并探讨了纳米片的除磷性能。结果表明复合体对磷酸二氢根离子有很高的选择吸附性和较大的吸附量,吸附量最大约为40 mg(P)·g-1 (LDHs)。 |
| 关键词: 层状化合物 纳米片 胶体 吸附 磷 |
| 基金项目: 北京市自然科学基金(No.2112022)、国家自然科学基金(NSFC51172247, 5100381和20904064 )资助项目。 |
| Abstract: In order to take advantage of large specific surface area, the nanosheets obtained by delaminating ZnAl layered double hydroxides (ZnAl-LDHs) in formamide were stabilized by cellulose in aqueous solution. The structure, composition and morphology of the resulting nanocomposites of ZnAl-LDHs nanosheets and carboxymethyl cellulose were characterized by XRD, FTIR, SEM, TEM, C, H, and N elemental analysis, ICP and ion chromatograph techniques. In addition, the performance of ZnAl-LDHs nanosheets on phosphorus removal was investigated. The results show that the nanocomposites have high selectivity and adsorption capacity toward phosphate. The selectivity sequences are as follows: H2PO4->SO42->Cl->NO3-. The maximum adsorption capacity could reach 40 mg of P per gram of LDHs approximately. |
| Keywords: layered compounds nanosheets colloids adsorption phosphorus |
| 投稿时间：2012-08-16 修订日期：2012-09-30 |
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| 张燕茹,梁杜娟,吴敏,赵新华,杨晓晶.用纤维素分散ZnAl-LDHs纳米片提高磷吸附性能[J].无机化学学报,2013,29(3):628-634. |
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