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Hydrolytically Stable Nanotubular Cationic Metal–Organic Framework for Rapid and Efficient Removal of Toxic Oxo-Anions and Dyes from Water
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2019-02-05 00:00:00 , DOI: 10.1021/acs.inorgchem.9b00104 Shu-Qi Deng 1 , Xiao-Jing Mo 1 , Sheng-Run Zheng 1 , Xia Jin 1 , Yong Gao 1 , Song-Liang Cai 1 , Jun Fan 1 , Wei-Guang Zhang 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2019-02-05 00:00:00 , DOI: 10.1021/acs.inorgchem.9b00104 Shu-Qi Deng 1 , Xiao-Jing Mo 1 , Sheng-Run Zheng 1 , Xia Jin 1 , Yong Gao 1 , Song-Liang Cai 1 , Jun Fan 1 , Wei-Guang Zhang 1
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Cationic framework materials capable of removing anionic pollutants from wastewater are highly desirable but relatively rarely reported. Herein, a cationic MOF (SCNU-Z1-Cl) possessing tubular channels with diameter of 1.5 nm based on Ni(II) and a nitrogen-containing ligand has been synthesized and applied to capture hazardous anionic contaminants from water. The SCNU-Z1-Cl exhibits high BET surface area of 1636 m2/g, and shows high hydrolytically stability in pH range from 4 to 10. Owing to the large tubular channels and the uncoordinated anions in the framework, the aqueous-phase anion-exchange applications of SCNU-Z1-Cl were explored with environmentally toxic oxo-anions including CrO42–, Cr2O72–, MnO4–, and ReO4–, and organic dyes. The adsorption of oxoanions exhibits high uptake kinetics and the adsorption capacities of CrO42–, Cr2O72–, MnO4–, and ReO4– are 126, 241, 292, and 318 mg/g, respectively, which were some of the highest values in the field of MOF/COF. In additional, the selectively is high when other concurrent anions are exist. The anionic dyes with different sizes including methyl orange, acid orange A, congo red, as well as methyl blue can be adsorbed by SCNU-Z1-Cl in few minutes to about 1 h. The adsorption capacities for them are 285, 180, 585, and 262 mg/g, respectively. In contrast, the adsorption kinetics for catinionic dyes with different sizes is obviously lower and exhibit a size-selectively adsorption that only cationic dye with suitable size (rhodamine B) can be adsorbed by SCNU-Z1-Cl. Consequently, SCNU-Z1-Cl can sepearate organic dyes in three different modes: size-dependent, charge-dependent, and kinetics-dependent selective adsorption. The excellent adsorption and separation properties of SCNU-Z1-Cl is attribute to the cationic framework, large tubular channel, as well as the high positive Zeta potential.
中文翻译：
水解稳定的纳米管阳离子金属-有机骨架，可快速有效地从水中去除有毒的氧阴离子和染料
能够从废水中去除阴离子污染物的阳离子骨架材料是非常需要的，但很少被报道。在此，已经合成了具有基于Ni（II）的直径为1.5nm的管状通道和含氮配体的阳离子MOF（SCNU-Z1-Cl），并将其用于从水中捕获有害的阴离子污染物。SCNU-Z1-Cl具有1636 m 2 / g的高BET表面积，并且在4至10的pH范围内具有较高的水解稳定性。由于较大的管状通道和骨架中未配位的阴离子，水相阴离子用对环境有毒的含氧阴离子包括CrO 4 2–，Cr 2 O 7 2–，MnO探索了SCNU-Z1-Cl的交换应用4 –和ReO 4 –以及有机染料。含氧阴离子的吸附具有很高的吸收动力学，并且对CrO 4 2–，Cr 2 O 7 2–，MnO 4 –和ReO 4 –的吸附能力强。分别为126、241、292和318 mg / g，这是MOF / COF领域中的一些最高值。另外，当存在其他同时存在的阴离子时，选择性高。SCNU-Z1-Cl可以在几分钟到大约1小时内吸附不同大小的阴离子染料，包括甲基橙，酸性橙A，刚果红以及甲基蓝。它们的吸附容量分别为285、180、585和262 mg / g。相比之下，具有不同尺寸的阳离子染料的吸附动力学明显较低，并且表现出对尺寸的选择性吸附，只有大小合适的阳离子染料（若丹明B）才能被SCNU-Z1-Cl吸附。因此，SCNU-Z1-Cl可以三种不同的方式分离有机染料：尺寸依赖型，电荷依赖型和动力学依赖型选择性吸附。
更新日期：2019-02-05
中文翻译：
水解稳定的纳米管阳离子金属-有机骨架，可快速有效地从水中去除有毒的氧阴离子和染料
能够从废水中去除阴离子污染物的阳离子骨架材料是非常需要的，但很少被报道。在此，已经合成了具有基于Ni（II）的直径为1.5nm的管状通道和含氮配体的阳离子MOF（SCNU-Z1-Cl），并将其用于从水中捕获有害的阴离子污染物。SCNU-Z1-Cl具有1636 m 2 / g的高BET表面积，并且在4至10的pH范围内具有较高的水解稳定性。由于较大的管状通道和骨架中未配位的阴离子，水相阴离子用对环境有毒的含氧阴离子包括CrO 4 2–，Cr 2 O 7 2–，MnO探索了SCNU-Z1-Cl的交换应用4 –和ReO 4 –以及有机染料。含氧阴离子的吸附具有很高的吸收动力学，并且对CrO 4 2–，Cr 2 O 7 2–，MnO 4 –和ReO 4 –的吸附能力强。分别为126、241、292和318 mg / g，这是MOF / COF领域中的一些最高值。另外，当存在其他同时存在的阴离子时，选择性高。SCNU-Z1-Cl可以在几分钟到大约1小时内吸附不同大小的阴离子染料，包括甲基橙，酸性橙A，刚果红以及甲基蓝。它们的吸附容量分别为285、180、585和262 mg / g。相比之下，具有不同尺寸的阳离子染料的吸附动力学明显较低，并且表现出对尺寸的选择性吸附，只有大小合适的阳离子染料（若丹明B）才能被SCNU-Z1-Cl吸附。因此，SCNU-Z1-Cl可以三种不同的方式分离有机染料：尺寸依赖型，电荷依赖型和动力学依赖型选择性吸附。
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