Colorimetric detection of copper and efficient removal of heavy metal ions from water by diamine-functionalized SBA-15.
Colorimetric detection of copper and efficient removal of heavy metal ions from water by diamine-functionalized SBA-15.
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DOI：
10.1039/c3dt53641f
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发表时间：
2014-05
影响因子：
4
通讯作者：
Zhuqing Wang;Min Wang;Genhua Wu;Dayu Wu;A. Wu
中科院分区：
文献类型：
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作者：
Zhuqing Wang;Min Wang;Genhua Wu;Dayu Wu;A. Wu
合成了N-[3-(三甲氧基硅基)丙基]乙二胺(TPED)功能化的SBA-15分子筛，并将其用于水溶液中铜离子的比色测定和重金属离子的去除。与游离的SBA-15相比，二胺功能化的SBA-15(SBA-TPED)对铜、铅、锌的最大吸附容量分别为27.22、96.43和12.16 mg·g~(-1)。SBA-TPED对Cu2+具有较高的选择性，对Cu2+/Pb2+的相对选择性系数大于10，对Cu2+/Zn(2+)的相对选择性系数大于60。SBA-TPED法对铜(2+)的肉眼检出限为0.95ppm，用于实际水样中铜(2+)的测定，结果令人满意。此外，SBA-TPED对Cu2+的吸附动力学较快，饱和时间小于30min，可通过简单的酸处理进行再生。
SBA-15 functionalized with N-[3-(trimethoxysilyl)propyl]ethylene-diamine (TPED) was synthesized and used for the colorimetric detection of Cu(2+) and removal of heavy metal ions in aqueous solutions. Compared to free SBA-15, the adsorption ability of diamine-functionalized SBA-15 (depicted as SBA-TPED) increased remarkably, the maximum adsorption capacity of SBA-TPED for Cu(2+), Pb(2+) and Zn(2+) was 27.22, 96.43 and 12.16 mg g(-1), respectively. Furthermore, SBA-TPED exhibits high selectivity for Cu(2+) with the relative selectivity coefficient of SBA-TPED for Cu(2+)/Pb(2+) being over 10 and for Cu(2+)/Zn(2+) being over 60. The naked-eye detection limit of SBA-TPED for Cu(2+) is 0.95 ppm, and the determination of Cu(2+) in real water samples also displays satisfactory results. Moreover, SBA-TPED possesses fast kinetics for removing Cu(2+) with a saturation time of less than 30 min, and can be regenerated by simple acid treatment.