Ultrathin layered double hydroxide nanosheets prepared from a water-in-ionic liquid surfactant-free microemulsion for phosphate removal from aquatic systems
Ultrathin layered double hydroxide nanosheets prepared from a water-in-ionic liquid surfactant-free microemulsion for phosphate removal from aquatic systems
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由不含表面活性剂的离子液体包水微乳液制备的超薄层状双氢氧化物纳米片，用于去除水生系统中的磷酸盐
DOI：
10.1016/j.cej.2016.05.073
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发表时间：
2016-10
影响因子：
15.1
通讯作者：
Hou Wanguo
中科院分区：
文献类型：
--
作者：
Zhan Tianrong;Zhang Yumei;Yang Qi;Deng Huanhuan;Xu Jie;Hou Wanguo
采用无表面活性剂的离子液体包水反相微乳液法可控制备了小尺寸的层状双氢氧化镁（LDH）纳米片。分别以金属盐和碱水溶液为水相制备BmimPF 6-二甲基甲酰胺-水反相微乳液。得到了直径分布较窄（约10-35 nm）的未污染LDH片层（LDH-M）。LDH纳米片具有均匀的横向尺寸（约31 nm）和较小的厚度（约0.71 nm），可能由单一的水镁石样层组成。与传统的共沉淀法相比，LDH具有更大的比表面积（110-291 m2/g）和更小的孔径（17.57 nm和13.83 nm）。将其煅烧产物（LDO）在水中处理，得到了明显聚集、尺寸较大的花状LDH纳米片。磷酸盐吸附实验表明，小尺寸LDH纳米片对低浓度磷酸盐的去除能力上级大尺寸LDH片。然而，由于失去了碳酸盐与金属氢氧化物层的相互作用，LDO产品表现出更优异的吸附效率。经过5次循环使用后，回收的LDH-M纳米片和煅烧产物LDO的吸附效率保持在原吸附剂的88.7-93.5%，表明具有良好的可重复使用性。
A water-in-(ionic liquid) surfactant-free reverse microemulsion were used for the controllable preparation of the small sized Mg2Al-layered double hydroxide (LDH) nanosheets. The metallic salts and alkali aqueous solutions were respectively employed as water phase for preparation of BmimPF6-dimethylformamide-water reverse microemulsions. Then the uncontaminated LDH sheets (LDH-M) have been afforded with a narrow diameter distribution (∼10–35 nm). The LDH nanoplatelets present a uniform lateral dimension (∼31 nm) and a small thickness (∼0.71 nm), which may probably be composed of single brucite-like layer. They display larger surface areas (110–291 m2/g) and smaller pore sizes (17.57 nm and ∼3.83 nm) than LDH based on traditional co-precipitation technique. The treatment of its calcined product (LDO) in water results in the flower-like LDH nanosheets with obvious aggregation and larger size. The phosphate adsorption experiments show that the small sized LDH nanosheets perform superior removal ability toward low concentration phosphate to the large sized LDH sheets. However, the LDO product exhibits further excellent adsorption efficiency due to losing the interaction of carbonate with metal hydroxide layers. After five recycle usage, the ultrathin LDH-M nanoflakes and the calcined product LDO keep about 88.7–93.5% uptake efficiency of the original adsorbents, indicating a good reusability.
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无表面活性剂反相微乳液中Mg2Al-Cl层状双氢氧化物纳米片的合成
DOI：
10.1007/s00396-013-2996-8
发表时间：
2013-06
期刊：
Colloid Polym. Sci.
影响因子：
--
作者：
Zhang, Lin;Li, Dongxiang;Zhao, Jikuan;Hou, Wanguo
通讯作者：
Hou, Wanguo
影响因子：
--
作者：
Chenglei Wang;D. O′Hare
通讯作者：
Chenglei Wang;D. O′Hare
影响因子：
9.9
作者：
Tianrong Zhan;Qi Yang;Yumei Zhang;Xinjun Wang;Jie Xu;W. Hou
通讯作者：
Tianrong Zhan;Qi Yang;Yumei Zhang;Xinjun Wang;Jie Xu;W. Hou
影响因子：
8.6
作者：
Kun Yang;Liang-guo Yan;Yan-ming Yang;Shu-jun Yu;Ran-ran Shan;Haiqin Yu;Baocun Zhu;B. Du
通讯作者：
Kun Yang;Liang-guo Yan;Yan-ming Yang;Shu-jun Yu;Ran-ran Shan;Haiqin Yu;Baocun Zhu;B. Du
影响因子：
15
作者：
Xu, ZP;Stevenson, GS;Gray, PP
通讯作者：
Gray, PP