Two-dimensional hydrophilic ZIF-L as a highly-selective adsorbent for rapid phosphate removal from wastewater

Huang, Chou Long; Zhang, Haichuan; Zheng, Kuiyang; Zhang, Zhenghao; Jiang, Qiuming; Ji, Li

doi:10.1016/j.scitotenv.2021.147382

Cited by 69 publications

(33 citation statements)

References 52 publications

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“…The Zn 2p peaks are divided into Zn 2p3/2 (1021.98 eV and 1023.78 eV), and Zn 2p1/2 (1045.08 eV and 1047.08 eV), where the binding energies of 1021.98 eV and 1045.08 eV correspond to Zn 0 , and 1023.78 eV and 1047.08 eV correspond to Zn 2+ [ 31 , 32 , 33 ]. In addition, the built-in diagram shows three splitting peaks of O1 at 530.98 eV, 532.38 eV, and 533.78 eV, corresponding to Zn-O, Zn-O-H, and O-H, respectively [ 34 , 35 ]. Figure 2 C shows two distinct splitting peaks at Cu 2p 3/2 (933.23 eV, 952.9 eV) assigned to the metal Cu 0 , demonstrating that the metal Cu is effectively reduced, while the splitting peaks at Cu 2p 1/2 (935.86 eV, 954.95 eV) belong to Cu 2+ (CuO), and the heterogeneous peaks between Cu 2p 3/2 and Cu 2p 1/2 are Cu 2+ Satellite [ 36 , 37 , 38 ].…”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Luteolin Electrochemical Sensor Based on Novel Lamellar CuZn@ Nitrogen-Containing Carbon Nanosheets

Yang

et al. 2022

Nanomaterials

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The Cu/Zn-zeolitic imidazolate framework (Cu/Zn-ZIF) was synthesized using the traditional hydrothermal method, and its surface morphology was controlled by adding polyvinylpyrrolidone (PVP) during its synthesis. It was then calcined at 800 °C to form the nitrogen-containing carbon material CuZn@NC, which improved the electron transfer rate. Scanning electron microscopy (SEM), X-ray crystal diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to investigate the surface morphology and structure. Finally, the electrochemical sensing platform for luteolin was effectively constructed by changing the metal–ion ratio during synthesis to achieve the most suitable electrode material. The sensor platform detects luteolin well, with an operating curve equation of Ip (A) = 0.0571C (nM) − 1.2913 and a minimum detection limit of 15 nM, and the platform has been successfully employed for luteolin detection in real samples.

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Section: Resultsmentioning

confidence: 99%

Ultrasensitive Luteolin Electrochemical Sensor Based on Novel Lamellar CuZn@ Nitrogen-Containing Carbon Nanosheets

Yang

et al. 2022

Nanomaterials

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“…The structural characteristics of 2D layered networks make ZIF-L an excellent membrane material. The ZIF-L membrane exhibited a higher CO 2 adsorption capacity or a superior adsorption selectivity for CO 2 /CH 4, CO 2 /H 2 , and other gases. , It also exhibited a superior permeability and selectivity for water treatment and organic dehydration from ethanol/water, oil/water, and other aqueous phases. , As a better adsorbent than other ZIFs, ZIF-L was used to quickly remove inorganic salts, dyes from water, or CO 2 from air. In addition, when ZIF-L was burned at 600 °C, the as-formed N-doped carbon layered nanosheets would be an excellent doping carrier material. − …”

Section: Introductionmentioning

confidence: 99%

Crystalline Structure and Thermal Stability of an Unknown ZIF-L300 Phase

et al. 2023

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In recent years, the synthesis, crystalline structure, and applications of zeolite imidazole frameworks (ZIFs) have attracted extensive attention. Since the ZIF-L phase was synthesized, a new phase was observed during the heating process, but its crystal structure is unknown. The unknown new phase, which was named ZIF-L300 in this study, was confirmed again. In this study, the X-ray powder diffraction technique and Rietveld refinement were used to solve the crystalline structure of the unknown ZIF-L300 phase. The results demonstrate that ZIF-L300 has the same chemical formula (ZnC8N4H10) as in ZIF-8 and belongs to a hexagonal structure with a space group of P61. The lattice parameters have been determined as follows: a = b = 8.708(7) Å, c = 24.195(19) Å, α = β = 90°, and γ = 120°. The X-ray absorption fine structure (XAFS) technique was also used to extract the local atomic structures. The in situ X-ray diffraction (XRD) technique was used to monitor the structural evolution of the as-prepared ZIF-L in a temperature range from room temperature to 600 °C. The results show that the sample experiences a change process from the initial ZIF-L orthorhombic phase (<210 °C), to the ZIF-L300 hexagonal phase (∼300 °C), then to an amorphous phase (∼390 °C), and finally to a zincite ZnO phase (>420 °C). These sorts of structural information are helpful to the application of ZIF materials and enrich the knowledge of the thermal stability of ZIF materials.

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“…Zeolite imidazolate frameworks (ZIF) are a subgroup of metal–organic frameworks, which are constructed by bonding metal and imidazole ligands. Due to their large surface area, high porosity, and other excellent properties, ZIF materials have been used as adsorption materials, , molecular sieves, , catalysts, , drug carriers, and so on. In the recent 10 years, most of the studies on ZIF materials − have focused on ZIF-8 and ZIF-67, while there have been few studies on other ZIF materials.…”

Section: Introductionmentioning

confidence: 99%

Moisture-Assisted Synthesis and Carbon Dioxide Capture Performance of ZIF-L in Methanol Solution

Zhong

Wang

Liu

et al. 2023

Crystal Growth & Design

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The leaf-like zeolite imidazolate framework (ZIF-L) with a lamellar structure is an excellent gas adsorption material. It is generally considered that the synthesis of ZIF-L must be carried out in an aqueous solution. In this study, an almost pure ZIF-L crystalline phase with nanoflake morphology was unexpectedly synthesized as the Zn 2+ concentration in the methanol solution was greater than or equal to 0.36 M, and the molar ratio of Hmim to Zn 2+ was fixed at 4:1. X-ray diffraction was used to characterize the crystalline structure of the product. X-ray absorption fine structure spectra were used to analyze the local atomic structure around Zn. Scanning electron microscopy was used to observe the morphology of products. Through air isolation experiments, it was found that the ambient moisture is a critical factor in determining the final product because the moisture not only penetrated the precursor solution but also participated in the synthesis of the ZIF-L phase. The as-prepared ZIF-L phase exhibits good CO 2 adsorption performance. Its CO 2 adsorption capacity is 1.09 for ZIF-Zn1, 1.04 for ZIF-Zn2, 1.42 for ZIF-Zn4, and 1.16 mmol/g for ZIF-Zn6 at ambient temperature and normal pressure. This study provides a moisture-assistant approach to synthesize the ZIF-L phase in a non-aqueous solution.

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Two-dimensional hydrophilic ZIF-L as a highly-selective adsorbent for rapid phosphate removal from wastewater

Cited by 69 publications

References 52 publications

Ultrasensitive Luteolin Electrochemical Sensor Based on Novel Lamellar CuZn@ Nitrogen-Containing Carbon Nanosheets

Ultrasensitive Luteolin Electrochemical Sensor Based on Novel Lamellar CuZn@ Nitrogen-Containing Carbon Nanosheets

Crystalline Structure and Thermal Stability of an Unknown ZIF-L300 Phase

Moisture-Assisted Synthesis and Carbon Dioxide Capture Performance of ZIF-L in Methanol Solution

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