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Saßnick HD, Machado Ferreira De Araujo F, Edzards J, Cocchi C. Impact of Ligand Substitution and Metal Node Exchange in the Electronic Properties of Scandium Terephthalate Frameworks. Inorg Chem 2024; 63:2098-2108. [PMID: 38230647 PMCID: PMC10828989 DOI: 10.1021/acs.inorgchem.3c03945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/21/2023] [Accepted: 01/03/2024] [Indexed: 01/18/2024]
Abstract
The search for sustainable alternatives to established materials is a sensitive topic in materials science. Due to their unique structural and physical characteristics, the composition of metal-organic frameworks (MOFs) can be tuned by the exchange of metal nodes and the functionalization of organic ligands, giving rise to a large configurational space. Considering the case of scandium terephthalate MOFs and adopting an automatized computational framework based on density-functional theory, we explore the impact of metal substitution with the earth-abundant isoelectronic elements Al and Y, and ligand functionalization of varying electronegativity. We find that structural properties are strongly impacted by metal ion substitution and only moderately by ligand functionalization. In contrast, the energetic stability, the charge density distribution, and the electronic properties, including the size of the band gap, are primarily affected by the termination of the linker molecules. Functional groups such as OH and NH2 lead to particularly stable structures thanks to the formation of hydrogen bonds and affect the electronic structure of the MOFs by introducing midgap states.
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Affiliation(s)
| | | | - Joshua Edzards
- Institute
of Physics, Carl-von-Ossietzy Universität
Oldenburg, 26129 Oldenburg, Germany
| | - Caterina Cocchi
- Institute
of Physics, Carl-von-Ossietzy Universität
Oldenburg, 26129 Oldenburg, Germany
- Center
for Nanoscale Dynamics (CeNaD), Carl-von-Ossietzy
Universität Oldenburg, 26129 Oldenburg, Germany
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Zhu Z, Jiang Y, Wang Z, He M, Zhou P. Effective removal of humic acid by mesoporous Zr-MOF adjusted through SDBS. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:73043-73051. [PMID: 35616843 DOI: 10.1007/s11356-022-20985-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Humic acid (HA) in makeup water is one of the important safety issues of high-parameter power plants. Herein, the Zr-based metal-organic frameworks (NH2-UiO-66) was applied to remove humic acid in water. The mesoporous of NH2-UiO-66 was controlled by surfactants sodium dodecyl benzene sulfonate (SDBS) to increase the adsorption of HA. The adsorption of HA at 25°C and pH 7 increased fast at the first 0.5 h and then gradually reached equilibrium after 10 h. The maximum adsorption capacity was 108.93 mg g-1, which removal efficiency was high as 95.0%. The morphology and adsorption properties of NH2-UiO-66 were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), surface charge, Fourier transform infrared (FT-IR), N2 adsorption-desorption, and adsorption test. The adsorption process of HA accorded with the pseudo-second-order kinetics, while the adsorption isotherm conformed to be the Langmuir model and the adsorption was proved to be monolayer adsorption. Adsorption was the spontaneous and endothermic process (ΔG°<0, ΔH°>0). The accessible surface area provided by mesopores on the 5 different Zr-MOFs was the reason for the enhanced HA adsorption capacity. These results provided useful information for effective HA removing and enhanced our understanding of the adsorption mechanism of HA on NH2-UiO-66.
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Affiliation(s)
- Zhiping Zhu
- School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan, China.
| | - Yuankang Jiang
- School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan, China
| | - Zhenggang Wang
- School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan, China
| | - Mingpeng He
- School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan, China
| | - Pan Zhou
- School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan, China
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Shi T, Hussain S, Ge C, Liu G, Wang M, Qiao G. ZIF-X (8, 67) based nanostructures for gas-sensing applications. REV CHEM ENG 2022. [DOI: 10.1515/revce-2021-0100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
ZIF-8 and ZIF-67 are the most investigated zeolitic imidazolate frameworks (ZIFs) materials that have aroused enormous scientific interests in numerous areas of application including electrochemistry, gas storage, separation, and sensors by reason of their fascinating structural properties. Recently, there is a rapidly growing demand for chemical gas sensors for the detection of various analytes in widespread applications including environmental pollution monitoring, clinical analysis, wastewater analysis, industrial applications, food quality, consumer products, and automobiles. In general, the key to the development of superior gas sensors is exploring innovative sensing materials. ZIF-X (8, 67) based nanostructures have demonstrated great potential as ideal sensing materials for high-performance sensing applications. In this review, the general properties and applications of ZIF-X (8, 67) including gas storage and gas adsorption are first summarized, and then the recent progress of ZIF-X (8, 67) based nanostructures for gas-sensing applications and the structure-property correlations are summarized and analyzed.
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Affiliation(s)
- Tengfei Shi
- School of Materials Science and Engineering , Jiangsu University , Zhenjiang , 212013 , China
| | - Shahid Hussain
- School of Materials Science and Engineering , Jiangsu University , Zhenjiang , 212013 , China
| | - Chuanxin Ge
- School of Materials Science and Engineering , Jiangsu University , Zhenjiang , 212013 , China
| | - Guiwu Liu
- School of Materials Science and Engineering , Jiangsu University , Zhenjiang , 212013 , China
| | - Mingsong Wang
- School of Materials Science and Engineering , Jiangsu University , Zhenjiang , 212013 , China
| | - Guanjun Qiao
- School of Materials Science and Engineering , Jiangsu University , Zhenjiang , 212013 , China
- State Key Laboratory for Mechanical Behavior of Materials , Xi’an Jiaotong University , Xi’an 710049 , China
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Abstract
Humic acid (HA) in makeup water is one of the important safety issues of high−parameter power plants. Herein, the Zr−based metal organic frameworks (Zr−MOFs) were applied to remove humic acid in water. The mesoporous and active sites of Zr−MOFs were controlled by different ratios of ligands to increase the adsorption of HA. The maximum adsorption capacity was 150.15 mg g−1. The morphology and adsorption properties of the Zr−MOFs were characterized using scanning electron microscopy (SEM), X−ray diffraction (XRD), surface charge, Fourier Transform infrared (FT−IR), N2 adsorption−desorption and adsorption test. The adsorption process of HA accorded with the pseudo−second−order kinetics, while the adsorption isotherm conformed to the Langmuir model and the adsorption was proved to be a spontaneous and endothermic process. Physical adsorption by the mesoporous materials and the hydrogen bonding interactions between the Zr−MOFs and HA were the driving forces of HA adsorption. These results provided useful information for the effective removal of HA and enhanced our understanding of the adsorption mechanism of HA on Zr−MOFs.
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Wei W, Zhang F, Sun Y, Yue Q, Yu K, Guo W, Qu F. Enhancing triethylamine sensing of ZIF-derived ZnO microspheres arising from cobalt doping and defect engineering. CHEMOSPHERE 2022; 291:132715. [PMID: 34715109 DOI: 10.1016/j.chemosphere.2021.132715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/13/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
Reasonable doping is beneficial to the generation of defects, which is a feasibility strategy to improve the ZnO sensing performance. Herein, we presented an in situ self-sacrificing template strategy for fabricating Co doped h-ZnO core-shell structures (h-ZnO/ZnCox) with different defect contents, pyrolyzing hierarchical porous ZnO (h-ZnO) sub-microspheres coated by zeolite imidazolate frameworks (h-ZnO/ZIF-ZnCox). The investigations of X-ray photoelectron (XPS), photoluminescence (PL) and Raman spectra indicate that donor defects include zinc interstitial (Zni) and oxygen vacancy (VO) in h-ZnO/ZnCox can be tuned by Co dopant (x = 0-30%). Resultantly, the h-ZnO/ZnCox exhibits a significantly enhanced response and selectivity towards triethylamine (TEA), beyond the undoped h-ZnO, and 15% Co-doped h-ZnO (h-ZnO/ZnCo15%) conducts the maximum responses of 1020 to 50 ppm TEA at 573 K, in the top set for the similar type of sensors. Further, the sensing mechanism of h-ZnO/ZnCox is elaborated, possibly resulting from abundant active oxygen species conversed from more oxygen adsorbed which corresponds to cobalt doping generating rich donor-related defects and additional electrons in h-ZnO/ZnCo15%.
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Affiliation(s)
- Wenjing Wei
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China
| | - Feng Zhang
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China; Province and Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, PR China.
| | - Yimeng Sun
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China
| | - Qunfeng Yue
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China
| | - Kai Yu
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China; Province and Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, PR China
| | - Wei Guo
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China
| | - Fengyu Qu
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China; Province and Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, PR China.
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