Synthesis and characterizations of two bis(benzimidazole)-based cobaltous coordination polymers with high adsorption capacity for congo red dye

Xiao, Shu‐Lin; Li, Yuehua; Ma, Pei-Juan; Cui, Guang‐Hua

doi:10.1016/j.inoche.2013.09.047

Cited by 38 publications

(12 citation statements)

References 40 publications

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“…Figure shows that MIL-101(Cr)-2 exhibits good adsorption capabilities toward CR and MO, with respective maximum capacities of 1367.1 and 455.2 mg g –1 (1.96 and 1.39 mmol g –1 ), respectively, that are significantly higher than those of other porous materials (Tables S1 and S2), ,,− demonstrating that MIL-101(Cr)-2 can be employed in water treatment and for the adsorptive removal of organic dyes. For an initial CR concentration of 500 mg L –1 , the adsorption capacities of MIL-101(Cr)-0, MIL-101(Cr)-1, and MIL-101(Cr)-3 were determined to be 1109.1, 1204.3, and 1223.6 mg g –1 (i.e., 1.59, 1.73, and 1.76 mmol g –1 ), respectively (Figure a).…”

Section: Discussionmentioning

confidence: 95%

Effect of the Synergetic Interplay between the Electrostatic Interactions, Size of the Dye Molecules, and Adsorption Sites of MIL-101(Cr) on the Adsorption of Organic Dyes from Aqueous Solutions

Zhang

Huang

et al. 2018

Crystal Growth & Design

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Herein, we report that the surface charge status and size of the metal–organic framework (MOF) MIL-101(Cr) can be tailored by varying the concentration of tetramethylammonium hydroxide. The adsorption capacity of MIL-101(Cr)-2 toward the anionic dye Congo red (CR) was found to be significantly higher than that of other MIL-101(Cr) adsorbents, although MIL-101(Cr)-3 microcrystals exhibited the highest adsorption capacity toward the anionic dye methyl orange (MO) due to the different adsorption mechanisms involved. This is the first demonstration of the synergetic interplay between the electrostatic and π–π interactions, adsorption spaces and sites, and size of the dye molecules, in terms of the uptake capacity of an adsorbent. In addition, the obtained results shed new light on the adsorption mechanism toward organic dyes over MOFs. Moreover, the MIL-101(Cr) microparticles exhibited excellent adsorption capabilities toward CR, achieving a maximum capacity of 1367.1 mg g–1, which is higher than the majority of reported values for other materials. Therefore, these results indicate that the MIL-101(Cr) nanostructure exhibits potential for application in the treatment of anionic dye-containing wastewater.

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Section: Discussionmentioning

confidence: 95%

Effect of the Synergetic Interplay between the Electrostatic Interactions, Size of the Dye Molecules, and Adsorption Sites of MIL-101(Cr) on the Adsorption of Organic Dyes from Aqueous Solutions

Zhang

Huang

et al. 2018

Crystal Growth & Design

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“…In the past few years, MOFs have been explored for the adsorption and removal of dyes from aqueous solution, due to their diverse compositions and structure types, large surface area, tunable pore size, and coordinatively unsaturated or saturated metal sites to regulate the adsorption ability [11][12][13][14][15][16][17][18][19]. For example, Jhung et al reported the liquid-phase adsorption of methyl orange over two typical highly porous MIL-101 (MIL = Material of Institute Lavoisier) and MIL-53 and found that the adsorption capacity of MIL-101 was greater than MIL-53, showing the importance of porosity and pore size for the adsorption [11].…”

Section: Introductionmentioning

confidence: 99%

MIL-68 (In) nano-rods for the removal of Congo red dye from aqueous solution

Jin

Qian

Wang

et al. 2015

Journal of Colloid and Interface Science

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“…These uptakes are much higher than those of previously published porous materials (Table S5). ,− The adsorption capacities of MIL-100(Fe)-HF, MIL-100(Fe), and MIL-100(Fe)-TMA toward MO were 640.8, 645.2, and 668.2 mg g –1 , respectively (Figure c), implying that the adsorption capacity toward MO is not related to the synthesis conditions. The adsorption capacities of MIL-100(Fe)-HF, MIL-100(Fe), and MIL-100(Fe)-TMA toward AC were 498.9, 895.3, and 926.5 mg g –1 , respectively (Figure d), suggesting that the adsorption uptakes of AC are affected by the synthesis conditions, similar to CR.…”

Section: Resultsmentioning

confidence: 98%

Effect of Synergistic Interplay between Surface Charge, Crystalline Defects, and Pore Volume of MIL-100(Fe) on Adsorption of Aqueous Organic Dyes

Guo

Han

Yang³

et al. 2020

Ind. Eng. Chem. Res.

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We herein report that the morphology, size, and surface charge status of MIL-100(Fe) micro/nanoparticles can be tailored by adding a coordination modulator (HF or tetramethylammonium hydroxide) to the reaction system. Interestingly, the adsorption capacities of low-crystallinity MIL-100(Fe) and MIL-100(Fe)-TMA toward Congo red (CR) and acid chrome blue K (AC) were found to be significantly larger than that of the high-crystallinity MIL-100(Fe)-HF adsorbent, whereas there was little difference in the adsorption capacities of the three MIL-100(Fe) toward methyl orange (MO) and methylene blue (MB). The adsorption uptake of MIL-100-(Fe)-TMA toward the anionic dyes (CR, AC, and MO) was found to be highest, whereas the adsorption uptake of MIL-100(Fe) toward the cationic dye (MB) was the highest owing to different adsorption mechanisms. This adsorption behavior could be rationalized based on the morphological characteristics and crystal structure defects, zeta potential, and pore volume of MIL-100(Fe) and the adsorption characteristics and molecular structure of the dye. It was revealed that the adsorption performance of MIL-100(Fe) micro/nanoparticles is governed by the synergistic interplay between electrostatic, hydrophobic, and π−π stacking interactions, pore volume, crystal structure defects, and steric hindrance of the adsorbent.

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Synthesis and characterizations of two bis(benzimidazole)-based cobaltous coordination polymers with high adsorption capacity for congo red dye

Cited by 38 publications

References 40 publications

Effect of the Synergetic Interplay between the Electrostatic Interactions, Size of the Dye Molecules, and Adsorption Sites of MIL-101(Cr) on the Adsorption of Organic Dyes from Aqueous Solutions

Effect of the Synergetic Interplay between the Electrostatic Interactions, Size of the Dye Molecules, and Adsorption Sites of MIL-101(Cr) on the Adsorption of Organic Dyes from Aqueous Solutions

MIL-68 (In) nano-rods for the removal of Congo red dye from aqueous solution

Effect of Synergistic Interplay between Surface Charge, Crystalline Defects, and Pore Volume of MIL-100(Fe) on Adsorption of Aqueous Organic Dyes

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