Neodymium ion imprinted polymer(Nd^3+-IIP) particles for selective solid-phase extraction of Nd^3+ were prepared and determined with inductively coupled plasma atomic emission spectrometry(ICP-AES).The unleached...Neodymium ion imprinted polymer(Nd^3+-IIP) particles for selective solid-phase extraction of Nd^3+ were prepared and determined with inductively coupled plasma atomic emission spectrometry(ICP-AES).The unleached Nd^3+-IIP particles were prepared by the copoly-merization of Nd^3+-5,7-dichloroquinoline-8-ol-4-vinylpyridine ternary complex with styrene and divinyl benzene, then Nd^3+ was leached to obtain Nd^3+-IIP particles.The adsorption capacity of the Nd3+-IIP was 35.18 mg/g.The largest selectivity coefficient for Nd3+ in the presence of competitive ions such as La^3+, Ce^3+, Pr^3+ and Sm^3+ was over 110.The proposed method was validated by analyzing two certified reference materials(GBW07301a sediment and GBW07401 soil) and the determined values were in a good agreement with standard values.The method was convenient, selective, sensitive and applicable to the determination of trace Nd^3+ in environmental samples with complicated matrix.展开更多
A new ion-imprinted polymer (liP) was synthesized by copolymerization of 4-vinylpyridine (monomer), ethyleneglycoldimethacrylate (cross-linker) and 2,2-azobis-isobutyronitrile (initiator) in the presence of Cd...A new ion-imprinted polymer (liP) was synthesized by copolymerization of 4-vinylpyridine (monomer), ethyleneglycoldimethacrylate (cross-linker) and 2,2-azobis-isobutyronitrile (initiator) in the presence of Cd2+ and quinaldic acid (complexing agent). It was found that the adsorption capacity of IIP and blank polymer were 45.0 and 6.2 mg g-l, respectively. The relative selectivity coefficients of the imprinted polymer for different binary mixture were also calculated. Compared to non-imprinted polymer (NIP), the IIP had higher selectivity for Cd(II). The IIP was used as a sorbent for cadmium extraction from water samples by using a simple batch extraction procedure. The effect of different parameters on Cd2+ extraction and its recovery from the IIP were evaluated and optimized by using experimental design methodology. The optimized adsorption/desorption procedure was applied for cadmium removal from the real water samples. The obtained recoveries proved that this IIP could be used for removal of trace cadmium ions from water samples.展开更多
溶胶-凝胶法制备二氧化钛/羧基碳纳米管(Ti O2/MWNTs-COOH),接枝壳聚糖并通过乙烯基三甲氧基硅烷化反应制备生物碳基质功能单体-乙烯基碳纳米管双功能基壳聚糖。利用Cu2+为模板离子,通过交联反应制备生物基质新型离子印迹聚合物(Novel i...溶胶-凝胶法制备二氧化钛/羧基碳纳米管(Ti O2/MWNTs-COOH),接枝壳聚糖并通过乙烯基三甲氧基硅烷化反应制备生物碳基质功能单体-乙烯基碳纳米管双功能基壳聚糖。利用Cu2+为模板离子,通过交联反应制备生物基质新型离子印迹聚合物(Novel ion imprinted polymer on biological carbon matrix,NIIPs-BCM)。傅里叶变换红外光谱(FT-IR)、固体核磁共振波谱(CP/MAS 13C-NMR)和扫描电镜(SEM)对中间产物和NIIPs-BCM进行结构表征,表观形貌分析法考察生物降解性能并利用同步热分析仪(DSC-TG)进行热稳定性测试,原子吸收光谱仪(AAS)进行离子印迹聚合物识别性能研究。结果表明,成功制备了对金属Cu2+具有选择性吸附的NIIPs-BCM。NIIPs-BCM具有显著生物降解性,热稳定性分析结果表明NIIPs-BCM具有良好的热稳定性,热失重率为67%。原子吸收法分析NIIPs-BCM的离子识别性能表明,其对Cu2+的特异识别性明显优于非离子印迹聚合物(Non-novel ion imprinted polymer on biological carbon matrix,NNIIPs-BCM),识别理论符合静态等温吸附方程。展开更多
There is need to determination of uranium concentration at ppb level in environmental matrices.Due to low sensitivity of FAAS,UV-Visible Spectroscopy is generally used as measurement technique.In this study,ion-imprin...There is need to determination of uranium concentration at ppb level in environmental matrices.Due to low sensitivity of FAAS,UV-Visible Spectroscopy is generally used as measurement technique.In this study,ion-imprinted polymers(IIP)were prepared for uranyl ion(imprint ion)by formation of ternary(salicylaldoxime and 4-vinylpyridine)complex in 2-methoxy ethanol(porogen)following copolymerization with methacrylic acid(MAA)as a functional monomer and ethylene glycol dimethacrylate(EGDMA)as crosslinking monomer using 2,2-azobisisobutyronitrile as initiator.The synthesized polymers were characterized by FTIR and TGA analysis.ArsenazoⅢin 3M HClO_4 was used as complexing agent in the measurement step.The optimal pH for preconcentration was found to be between 3.5~6.5values.The developed method was applied to uranium(Ⅵ)determination in natural water samples.展开更多
文摘Neodymium ion imprinted polymer(Nd^3+-IIP) particles for selective solid-phase extraction of Nd^3+ were prepared and determined with inductively coupled plasma atomic emission spectrometry(ICP-AES).The unleached Nd^3+-IIP particles were prepared by the copoly-merization of Nd^3+-5,7-dichloroquinoline-8-ol-4-vinylpyridine ternary complex with styrene and divinyl benzene, then Nd^3+ was leached to obtain Nd^3+-IIP particles.The adsorption capacity of the Nd3+-IIP was 35.18 mg/g.The largest selectivity coefficient for Nd3+ in the presence of competitive ions such as La^3+, Ce^3+, Pr^3+ and Sm^3+ was over 110.The proposed method was validated by analyzing two certified reference materials(GBW07301a sediment and GBW07401 soil) and the determined values were in a good agreement with standard values.The method was convenient, selective, sensitive and applicable to the determination of trace Nd^3+ in environmental samples with complicated matrix.
文摘A new ion-imprinted polymer (liP) was synthesized by copolymerization of 4-vinylpyridine (monomer), ethyleneglycoldimethacrylate (cross-linker) and 2,2-azobis-isobutyronitrile (initiator) in the presence of Cd2+ and quinaldic acid (complexing agent). It was found that the adsorption capacity of IIP and blank polymer were 45.0 and 6.2 mg g-l, respectively. The relative selectivity coefficients of the imprinted polymer for different binary mixture were also calculated. Compared to non-imprinted polymer (NIP), the IIP had higher selectivity for Cd(II). The IIP was used as a sorbent for cadmium extraction from water samples by using a simple batch extraction procedure. The effect of different parameters on Cd2+ extraction and its recovery from the IIP were evaluated and optimized by using experimental design methodology. The optimized adsorption/desorption procedure was applied for cadmium removal from the real water samples. The obtained recoveries proved that this IIP could be used for removal of trace cadmium ions from water samples.
文摘溶胶-凝胶法制备二氧化钛/羧基碳纳米管(Ti O2/MWNTs-COOH),接枝壳聚糖并通过乙烯基三甲氧基硅烷化反应制备生物碳基质功能单体-乙烯基碳纳米管双功能基壳聚糖。利用Cu2+为模板离子,通过交联反应制备生物基质新型离子印迹聚合物(Novel ion imprinted polymer on biological carbon matrix,NIIPs-BCM)。傅里叶变换红外光谱(FT-IR)、固体核磁共振波谱(CP/MAS 13C-NMR)和扫描电镜(SEM)对中间产物和NIIPs-BCM进行结构表征,表观形貌分析法考察生物降解性能并利用同步热分析仪(DSC-TG)进行热稳定性测试,原子吸收光谱仪(AAS)进行离子印迹聚合物识别性能研究。结果表明,成功制备了对金属Cu2+具有选择性吸附的NIIPs-BCM。NIIPs-BCM具有显著生物降解性,热稳定性分析结果表明NIIPs-BCM具有良好的热稳定性,热失重率为67%。原子吸收法分析NIIPs-BCM的离子识别性能表明,其对Cu2+的特异识别性明显优于非离子印迹聚合物(Non-novel ion imprinted polymer on biological carbon matrix,NNIIPs-BCM),识别理论符合静态等温吸附方程。
基金the Scientific Investigate Projects of Firat University,Turkey(FF.14.10)
文摘There is need to determination of uranium concentration at ppb level in environmental matrices.Due to low sensitivity of FAAS,UV-Visible Spectroscopy is generally used as measurement technique.In this study,ion-imprinted polymers(IIP)were prepared for uranyl ion(imprint ion)by formation of ternary(salicylaldoxime and 4-vinylpyridine)complex in 2-methoxy ethanol(porogen)following copolymerization with methacrylic acid(MAA)as a functional monomer and ethylene glycol dimethacrylate(EGDMA)as crosslinking monomer using 2,2-azobisisobutyronitrile as initiator.The synthesized polymers were characterized by FTIR and TGA analysis.ArsenazoⅢin 3M HClO_4 was used as complexing agent in the measurement step.The optimal pH for preconcentration was found to be between 3.5~6.5values.The developed method was applied to uranium(Ⅵ)determination in natural water samples.