超微Ni(OH)2纳米粒子的合成及其对Li^+的超高吸附性能  

Ni(OH)2 with Super⁃Small Nanoscale:Synthesis and Application in Li^+Adsorptions

作　　者：景楠 周安南[1] 王国会 王润伟[2] 徐庆红[1] JING Nan;ZHOU An-Nan;WANG Guo-Hui;WANG Run-Wei;XU Qing-Hong(State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China;State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China)

机构地区：[1]北京化工大学,化工资源有效利用国家重点实验室,北京100029 [2]吉林大学化学学院,无机合成与制备化学国家重点实验室,长春130012

出　　处：《无机化学学报》2021年第1期131-139,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21521005,U1362113);吉林大学无机水热合成与制备化学国家重点实验室开放课题(2018)资助。

摘　　要：在葡萄糖水溶液中合成得到平均粒径为5 nm的α-Ni(OH)2超微纳米粒子。研究结果发现,在水溶液中葡萄糖浓度能够控制α-Ni(OH)2纳米粒子粒径的大小,我们对其中的原理进行了剖析。当没有葡萄糖存在时,合成得到的Ni(OH)2晶型为β型,且颗粒粒径尺寸分布为微米级别。另外,研究发现α-Ni(OH)2超微纳米粒子室温下对中性水溶液中Li^+具有较强的吸附性能,且这种吸附性能随粒径的减小而剧烈增大;粒径为5 nm的α-Ni(OH)2粒子对Li^+的最大吸附量为214 mg·g^-1(远大于文献报道的有关吸附剂对Li^+的吸附容量),而粒径为1μm的β-Ni(OH)2在相同条件下对Li^+的最大吸附量低于30 mg·g^-1。计算分析表明,Li^+在α-Ni(OH)2纳米粒子表面吸附满足Freundlich方程,符合层层吸附模型。α-Ni(OH)2 nanoparticles with 5 nm average diameter were prepared under the existence of glucose in water solution,and the size ofα-Ni(OH)2 nanoparticles was found to be controlled by the concentration of glucose.A possible mechanism of the preparation process was proposed.When the synthesis was processed without existence of the glucose,β-Ni(OH)2 was obtained.The super-smallα-Ni(OH)2 nanoparticles showed strong adsorption ability to Li^+ions when pH value of the solution was about 7.0 under room temperature.Maximum adsorption capacity of the super-smallα-Ni(OH)2 nanoparticles to Li^+was about 214 mg·g^-1;however,theβ-Ni(OH)2 with diameter above 1.0μm was low than 30 mg·g^-1.Freundlich equation analysis and SEM images of the adsorption products indicate multilayers'adsorption process to Li^+ofα-Ni(OH)2 nanoparticles.

关 键 词：NI(OH)2 超微纳米粒子 Li+离子 吸附 

分 类 号：O647.3[理学—物理化学]