一种规整单壁碳纳米笼的合成与改性及其对水体结晶紫分子的吸附性能
Highly Uniform Monolayer-Carbon Nanocages: Facile Synthesis, Simple Modification and Adsorptive Properties for Aqueous Crystal Violet
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朱鸿宇 河海大学环境学院, 河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098  
杨汉培 河海大学环境学院, 河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098 yanghanpei@hhu.edu.cn 
孙慧华 河海大学环境学院, 河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098  
高照 河海大学环境学院, 河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098  
毛静涛 河海大学环境学院, 河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098  
吴俊明 河海大学环境学院, 河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098  
摘要: 运用催化气相沉积法及继之的纯化处理,获得了具有规整外型、中空及密集阵列的单壁三维结构碳纳米笼(carbon nanocages,CNCs)。尝试将其用于水体阳离子染料结晶紫(crystal violet,CV)的吸附去除,实验条件下其上CV的饱和吸附容量可达542.6 mg·g-1。进一步以十二烷基苯磺酸钠(sodium dodecyl benzene sulfonate,SDBS)对制得的CNCs表面进行亲水性改性,观察到了改性CNCs对CV吸附性能的明显提升,相同条件下其上CV的饱和吸附容量显著提升至748.5 mg·g-1。运用多种表征及测定,探明改性前后CNCs的组成和结构,并尝试与其吸附性能关联,在此基础上探明改性及促进机制,为进一步研发具有实用意义的污水处理技术提供有益参考。
关键词: 碳纳米笼  表面改性  十二烷基苯磺酸钠  结晶紫  吸附
基金项目: 国家重大科学仪器设备开发专项(No.2014YQ060773)、江苏省高校优势学科建设工程和南京领军型科技创业人才引进计划(No.2014B12007)资助项目。
Abstract: Three-dimensional structures of monolayer and hollow carbon nanocages were obtained by a facile method. These nanocages with controlled wall thickness are synthesized by catalytic templating on magnesium oxides (MgO), nucleating in situ during annealing of basic magnesium carbonate, using absolute ethyl alcohol as an inexpensive precursor of carbon, and following the MgO dissolution by dilute nitric acid solution. The obtained CNCs show a specific surface area as high as 906 m2·g-1, and conduct an adsorption capacity of 542.6 mg·g-1 for aqueous crystal violet under experimental conditions. The hydrophilia of as-prepared CNCs can be significantly improved through a simple modification by treating CNCs with sodium dodecyl benzene sulfonate, and the hydrophilic CNCs can capture CV molecules with an adsorption capacity saturated in 748.4 mg·g-1. The pristine and modified CNCs were extensively characterized by XRD, FT-IR, TEM, XPS and BET surface measurement, and the structure-performance of CNCs is careful correlated. The chemical adsorption mechanism during the removal of CV by CNCs is identified, and the interactions between CV and CNCs, through π-π and electrovalent bonds are proposed.
Keywords: carbon nanocages  surface modification  sodium dodecyl benzene sulfonate  crystal violet  adsorption
投稿时间:2017-08-23 修订日期:2017-12-12
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朱鸿宇,杨汉培,孙慧华,高照,毛静涛,吴俊明.一种规整单壁碳纳米笼的合成与改性及其对水体结晶紫分子的吸附性能[J].无机化学学报,2018,34(3):445-453.
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