期刊论文

中文

原子能科学技术

1000-6931

2015

49

12

2138-2144

10.7538/yzk.2015.49.12.2138

51574152 ,11205084:国家自然科学基金 2014GK3079 ,2012GK3132:湖南省科技厅项目 2014KS24:衡阳市科技局项目 NHCXTD04:南华大学科技创新团队项目

本校为第一机构

以介孔氧化硅SBA-15为模板,通过纳米浇筑法在模板孔道中引入不同质量的铁源和炭源作为前驱物,经过原位聚合反应,再使用[3-(三甲氧基硅烷)丙基]脲(UPTS)和氨丙基三乙氧基硅烷(APS)有机试剂对其表面进行后嫁接改性,得到介孔结构规整有序的功能化炭基磁性介孔材料(FCMMC)。并通过红外光谱(FT-IR)、N_2吸附-脱附分别表征了FCMMC的结构。考察了溶液pH值、铀初始浓度、吸附剂用量和吸附时间等因素对FCMMC吸附铀的影响。结果表明:炭基和铁基均被负载在介孔氧化硅基体上,FCMMC具有较高的比表面积和较窄的孔径分布。FCMMC吸附铀的最佳条件为:pH=6.0、铀初始浓度25mg/L、FCMMC用量40mg、吸附时间1.0h。对吸...

The macroporous silica SBA-15 as the hard template, a novel functionalized carbonaceous magnetic mesoporous composite (FCMMC) with highly ordered mesoporous structure was obtained using ferric nitrate and glucose as the precursors via one-step nanocasting followed by in-situ polymerization reaction, and using organic reagents UPTS and APS after grafting modification on its surface. FT-IR and N2 adsorption-stripping experiment were used to characterize FCMMC, and the factors impacting the adsorption of uranium on FCMMC were investigated includin...