摘要
以壳聚糖(CS)为生物模板,采用低温水热法成功制备出了多层状碱式碳酸锌(ZCHO)微晶。采用XRD、SEM和TG等手段对产物的结构、形态和热学性能进行了表征,结果表明,单个ZCHO微晶颗粒均是由许多ZCHO纳米片构成的。添加适量的CS对形成多层状ZCHO微晶起到了至关重要的作用。热重分析结果表明,CS辅助得到的碳酸锌微晶热稳定性较高。等温吸附实验表明,在室温下,多层状ZCHO微晶能有效脱除水体中的Cu2+,去除量与浓度关系符合Freundlich模型。最后讨论了多层状ZCHO微晶大容量去除Cu2+的可能机理。
Multilayered zinc carbonate hydroxide microcrystals(ZCHO)were prepared by hydrothermal method assisted chitosan(CS)templates.The as-prepared products were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and thermogravimetric analysis(TG).Results indicate that every ZCHO microcrystal had a multi-layered structure and was composed of many ZCHO nanoplates.The used CS played vital roles in the formation of multi-layered ZCHO microcrystals.TG measurements had further indicated that CS-assisted zinc carbonate microcrystals had higher thermal stability.The adsorption isotherm results showed that ZCHO microcrystals with CS exhibited massive removal of Cu^2+ from aqueous solution at room temperature.The equilibrium adsorption was well described by the Freundlich isotherm model.The possible removal mechanism of Cu^2+ by the multi-layered ZCHO was also discussed.
作者
徐泽忠
曹显志
杨智慧
韩成良
XU Ze-zhong;CAO Xian-zhi;YANG Zhi-hui;HAN Cheng-liang(Analysis and Testing Center of Hefei University,Hefei 230601,China;Department of Chemical and Materials Engineering of Hefei University,Hefei 230601,China)
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2018年第11期2384-2388,共5页
Journal of Synthetic Crystals
基金
2018年合肥学院自然科学发展基金重点项目(18ZR08ZDB)
关键词
碱式碳酸锌微晶
壳聚糖模板
水热法
Cu^2+脱除
Zinc carbonate hydroxide microcrystal
chitosan yemplate
hydrothermal method
removal of Cu^2+