Preparation of phosphorylated iron-doped ZIF-8 and their adsorption application for U(VI)

Pei, Jiaying; Chen, Zhongsheng; Wang, Youqun; Xiao, Bo; Zhang, Zhibin; Cao, Xiaohong; Liu, Yunhai

doi:10.1016/j.jssc.2021.122650

Cited by 15 publications

(4 citation statements)

References 45 publications

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“…In detail, the characteristic peaks of ZIF-8 at 2θ = 7.3°, 10.3°, 12.7, 14.8, 16.4, 18.0, 24.6, and 26.7 can be attributed to the crystalline planes (011), (002), (112), (022), (013), (222), (233), and (134), respectively. The as-prepared ZnBTC displayed an intense diffraction peak at 2θ = 10°, consistent with that in the literature [ 35 ], confirming the formation of ZnBTC. Nevertheless, the PXRD of ZnBTC significantly changed after the co-adsorption of H 2 O/NH 3 , and it was speculated that NH 3 and H 2 O destroyed the structure of ZnBTC to some extent.…”

Section: Resultssupporting

confidence: 89%

A Combined Experimental and Computational Study on the Adsorption Sites of Zinc-Based MOFs for Efficient Ammonia Capture

et al. 2022

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Ammonia (NH3) is a common pollutant mostly derived from pig manure composting under humid conditions, and it is absolutely necessary to develop materials for ammonia removal with high stability and efficiency. To this end, metal–organic frameworks (MOFs) have received special attention because of their high selectivity of harmful gases in the air, resulting from their large surface area and high density of active sites, which can be tailored by appropriate modifications. Herein, two synthetic metal–organic frameworks (MOFs), 2-methylimidazole zinc salt (ZIF-8) and zinc-trimesic acid (ZnBTC), were selected for ammonia removal under humid conditions during composting. The two MOFs, with different organic linkers, exhibit fairly distinctive ammonia absorption behaviors under the same conditions. For the ZnBTC framework, the ammonia intake is 11.37 mmol/g at 298 K, nine times higher than that of the ZIF-8 framework (1.26 mmol/g). In combination with theoretical calculations, powder XRD patterns, FTIR, and BET surface area tests were conducted to reveal the absorption mechanisms of ammonia for the two materials. The adsorption of ammonia on the ZnBTC framework can be attributed to both physical and chemical adsorption. A strong coordination interaction exists between the nitrogen atom from the ammonia molecule and the zinc atom in the ZnBTC framework. In contrast, the absorption of ammonia in the ZIF-8 framework is mainly physical. The weak interaction between the ammonia molecule and the ZIF-8 framework mainly results from the inherent severely steric hindrance, which is related to the coordination mode of the imidazole ligands and the zinc atom of this framework. Therefore, this study provides a method for designing promising MOFs with appropriate organic linkers for the selective capture of ammonia during manure composting.

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Section: Resultssupporting

confidence: 89%

A Combined Experimental and Computational Study on the Adsorption Sites of Zinc-Based MOFs for Efficient Ammonia Capture

et al. 2022

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“…The microstructure and morphology of the ZIF-8 crystal demonstrate that it is rhombohedral in shape, which is in accordance with previous observations. However, once compared to the original ZIF-8, the crystal structure of ZIF-8 after Fe doping exhibits an obvious collapse, which could be consistent with the notion that only a small portion of Fe 2+ is introduced into the ZIF-8 framework to replace Zn 2+ , and the remainder was oxidized to Fe 3+ and dispersed on the surface and pores of Fe-ZIF-8, causing the framework's stability to be compromised and the structure to collapse (Pei et al 2022). FZM has a chain structure.…”

Section: Sem Analysissupporting

confidence: 74%

Adsorption performance and optimization by response surface methodology on tetracycline using Fe-doped ZIF-8-loaded multi-walled carbon nanotubes

Tian

Jia

et al. 2022

Environ Sci Pollut Res

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A metal-organic framework material, an iron-doped ZIF-8 loaded with multi-walled carbon nanotubes (FZM), was fabricated and used to adsorb tetracycline (TC) in this investigation. The adsorption impact and mechanism of TC on FZM were revealed using batch adsorption experiments and characterization analyses. The effects of Fe doping amount, pH, temperature, beginning concentration, and coexisting ions on the adsorption effect of TC were explored. It was discovered that Fe doping amount of 75 mg, pH of 6, and initial concentration of 100 mg/L produced the optimum adsorption effect. TC adsorption was also enhanced by the presence of Ca 2+ . The adsorption process of TC on FZM followed the pseudosecond-order (PSO) kinetic and Freundlich isotherm models, indicating that chemisorption was the dominant factor in the removal process of TC and the reaction was multilayer adsorption, with a theoretical maximum saturation capacity of 1111.11 mg/g tted according to the Langmuir model, which was better than most other adsorbents. The procedure of TC adsorption on FZM. The adsorption process on FZM is a spontaneous, heat-absorbing process, and the adsorption capacity increases as the temperature rises. According to the ndings of the FTIR study undertaken before and after adsorption, the mechanism of TC on FZM is predominantly intermolecular hydrogen bonding, surface complexation, π-π interactions, and electrostatic interactions. The projected adsorption capacity of TC was 599.78 mg/g under optimal adsorption circumstances of pH 7.1, temperature 312.5 K, and injection amount 64.43 mg/L, with a divergence of 1.73 % from the actual value, according to the response surface optimization studies. Furthermore, FZM has high reusability, and after four cycles of trials, the adsorption capacity of TC on FZM may still be greater than 370 mg/g, with a 15% loss. The cost of treating 100 mg/L of TC e uent was estimated to be around 8.35 US$/m 3 , indicating that FZM had excellent application possibilities for TC removal.

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“…Carboni et al reported phosphoric acid functionalised mesoporous carbon to have better adsorption capacity compared to amidoxime and carboxyl groups with a maximum sorption capacity of 97 mg g −1 sorbent in acidic water and 67 mg g −1 sorbent in artificial water. 36 Phosphoryl functionalised chitosan, 37 mesoporous carbon, 38 mesoporous silica, 39 graphene oxide, 40 carbon aerogel, 41 cellulose nanofiber, 42 luffa rattan activated carbon, 43 hyper cross-linked polymers, 44 iron doped ZIF 45 have been used for uranium adsorption.…”

Section: Introductionmentioning

confidence: 99%

Prospective application of phosphorylated carbon nanofibers with a high adsorption capacity for the sequestration of uranium from ground water

2022

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Preparation of phosphorylated iron-doped ZIF-8 and their adsorption application for U(VI)

Cited by 15 publications

References 45 publications

A Combined Experimental and Computational Study on the Adsorption Sites of Zinc-Based MOFs for Efficient Ammonia Capture

A Combined Experimental and Computational Study on the Adsorption Sites of Zinc-Based MOFs for Efficient Ammonia Capture

Adsorption performance and optimization by response surface methodology on tetracycline using Fe-doped ZIF-8-loaded multi-walled carbon nanotubes

Prospective application of phosphorylated carbon nanofibers with a high adsorption capacity for the sequestration of uranium from ground water

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