本文主要研究内容
作者王晓静(2019)在《基于磺酸基的阴离子微/纳米吸附剂构建及其高效提锂研究》一文中研究指出:锂及其化合物在国民和国防等多个领域都具有重要的作用,特别是随着能源紧缺和环境污染问题的日益严峻,新能源的开发越来越受到人类的重视,锂电池成为热门研究方向之一。锂需求未来市场巨大,开发利用锂资源含量丰富的盐湖卤水的研究正飞速发展。本论文采用吸附分离法,基于磺酸基团的静电作用,从盐湖卤水中吸附分离锂离子,并运用动力学、热力学等模型考察了吸附材料HNTs-NH-CO-SS、PHIPE-SS-Ag、PHIPEs-RAFT-SS对目标离子Li+的吸附分离性能。具体研究内容如下:(1)以埃洛石纳米管作为基体材料,运用层层组装的技术手段在其表面修饰氨基,通过氨基与羧基的反应修饰S-(硫代苯甲酰基)硫乙酸,并通过可控聚合反应引入大量对苯乙烯磺酸基,合成了中空的磺酸基阴离子纳米吸附剂(HNTs-NH-CO-SS)。实验进行了HNTs-NH-CO-SS对Li+的吸附性能测试、平衡吸附实验和动力学实验的研究,结果表明吸附剂在6 h达到吸附平衡,吸附容量为10.81 mg g-1,表明吸附剂具有多位点修饰的磺酸基,易于吸附锂离子。(2)以埃洛石纳米管和Tween 80共同作为稳定剂,以AM和SS混合水溶液作为水相,液体石蜡为油相,采用Pickering O/W HIPEs制备多孔材料,在多孔聚合物表面经AgNO3溶液和NaBH4氧化还原反应原位修饰银颗粒,得到纳米银修饰的磺酸基阴离子多孔微米吸附剂(PHIPEs-SS-Ag)。微米级多孔聚合物吸附剂的多孔性,大量的磺酸基团和均匀固定的银粒子,具有提高传质、增加绑定结合Li+和抗微生物污染的能力。吸附实验研究静态模式的吸附动力学和热力学,考察了PHIPE-SS-Ag对Li+的吸附选择性和再生循环使用性能,并讨论了抗菌性能。结果表明在288 K时为单分子层吸附,吸附量为27.364 mg g-1,七次再生循环实验后材料的吸附能力仍保持初始值的85.71%,且抑菌圈明显,证明抗菌性能良好。(3)将纳米与微米吸附剂的优势进行结合,先进行纳米管表面改性,可控聚合反应接枝大量的对苯乙烯磺酸基单体,再以氨基和S-(硫代苯甲酰基)硫乙酸改性过的埃洛石纳米管和Tween 80共同作为稳定粒子,AM和SS作为分散相,液体石蜡为连续相,采用Pickering O/W HIPEs制备磺酸基阴离子微/纳米杂化型吸附剂(PHIPEs-RAFT-SS),使得PHIPEs-RAFT-SS具有双重识别位点,用于吸附Li+。吸附实验研究了对Li+的吸附,结果表明在288 K时为多分子层吸附,吸附量为56.458 mg g-1。此外,四次循环吸附后吸附剂仍保持初始84.07%的吸附能力,在吸附分离领域有潜在的优势。
Abstract
li ji ji hua ge wu zai guo min he guo fang deng duo ge ling yu dou ju you chong yao de zuo yong ,te bie shi sui zhao neng yuan jin que he huan jing wu ran wen ti de ri yi yan jun ,xin neng yuan de kai fa yue lai yue shou dao ren lei de chong shi ,li dian chi cheng wei re men yan jiu fang xiang zhi yi 。li xu qiu wei lai shi chang ju da ,kai fa li yong li zi yuan han liang feng fu de yan hu lu shui de yan jiu zheng fei su fa zhan 。ben lun wen cai yong xi fu fen li fa ,ji yu huang suan ji tuan de jing dian zuo yong ,cong yan hu lu shui zhong xi fu fen li li li zi ,bing yun yong dong li xue 、re li xue deng mo xing kao cha le xi fu cai liao HNTs-NH-CO-SS、PHIPE-SS-Ag、PHIPEs-RAFT-SSdui mu biao li zi Li+de xi fu fen li xing neng 。ju ti yan jiu nei rong ru xia :(1)yi ai luo dan na mi guan zuo wei ji ti cai liao ,yun yong ceng ceng zu zhuang de ji shu shou duan zai ji biao mian xiu shi an ji ,tong guo an ji yu suo ji de fan ying xiu shi S-(liu dai ben jia xian ji )liu yi suan ,bing tong guo ke kong ju ge fan ying yin ru da liang dui ben yi xi huang suan ji ,ge cheng le zhong kong de huang suan ji yin li zi na mi xi fu ji (HNTs-NH-CO-SS)。shi yan jin hang le HNTs-NH-CO-SSdui Li+de xi fu xing neng ce shi 、ping heng xi fu shi yan he dong li xue shi yan de yan jiu ,jie guo biao ming xi fu ji zai 6 hda dao xi fu ping heng ,xi fu rong liang wei 10.81 mg g-1,biao ming xi fu ji ju you duo wei dian xiu shi de huang suan ji ,yi yu xi fu li li zi 。(2)yi ai luo dan na mi guan he Tween 80gong tong zuo wei wen ding ji ,yi AMhe SShun ge shui rong ye zuo wei shui xiang ,ye ti dan la wei you xiang ,cai yong Pickering O/W HIPEszhi bei duo kong cai liao ,zai duo kong ju ge wu biao mian jing AgNO3rong ye he NaBH4yang hua hai yuan fan ying yuan wei xiu shi yin ke li ,de dao na mi yin xiu shi de huang suan ji yin li zi duo kong wei mi xi fu ji (PHIPEs-SS-Ag)。wei mi ji duo kong ju ge wu xi fu ji de duo kong xing ,da liang de huang suan ji tuan he jun yun gu ding de yin li zi ,ju you di gao chuan zhi 、zeng jia bang ding jie ge Li+he kang wei sheng wu wu ran de neng li 。xi fu shi yan yan jiu jing tai mo shi de xi fu dong li xue he re li xue ,kao cha le PHIPE-SS-Agdui Li+de xi fu shua ze xing he zai sheng xun huan shi yong xing neng ,bing tao lun le kang jun xing neng 。jie guo biao ming zai 288 Kshi wei chan fen zi ceng xi fu ,xi fu liang wei 27.364 mg g-1,qi ci zai sheng xun huan shi yan hou cai liao de xi fu neng li reng bao chi chu shi zhi de 85.71%,ju yi jun juan ming xian ,zheng ming kang jun xing neng liang hao 。(3)jiang na mi yu wei mi xi fu ji de you shi jin hang jie ge ,xian jin hang na mi guan biao mian gai xing ,ke kong ju ge fan ying jie zhi da liang de dui ben yi xi huang suan ji chan ti ,zai yi an ji he S-(liu dai ben jia xian ji )liu yi suan gai xing guo de ai luo dan na mi guan he Tween 80gong tong zuo wei wen ding li zi ,AMhe SSzuo wei fen san xiang ,ye ti dan la wei lian xu xiang ,cai yong Pickering O/W HIPEszhi bei huang suan ji yin li zi wei /na mi za hua xing xi fu ji (PHIPEs-RAFT-SS),shi de PHIPEs-RAFT-SSju you shuang chong shi bie wei dian ,yong yu xi fu Li+。xi fu shi yan yan jiu le dui Li+de xi fu ,jie guo biao ming zai 288 Kshi wei duo fen zi ceng xi fu ,xi fu liang wei 56.458 mg g-1。ci wai ,si ci xun huan xi fu hou xi fu ji reng bao chi chu shi 84.07%de xi fu neng li ,zai xi fu fen li ling yu you qian zai de you shi 。
论文参考文献
论文详细介绍
论文作者分别是来自江苏科技大学的王晓静,发表于刊物江苏科技大学2019-07-10论文,是一篇关于磺酸基论文,锂离子论文,多孔吸附剂论文,静电吸附论文,江苏科技大学2019-07-10论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自江苏科技大学2019-07-10论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:磺酸基论文; 锂离子论文; 多孔吸附剂论文; 静电吸附论文; 江苏科技大学2019-07-10论文;