MOLECULES
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2024
·Vol. 29
·期 24
·5845
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IF 4.2
Yaling Wu,Zhaopeng Sun,Yingying Chen,Dan Liu,Yan Meng,Zheng Yan
Metal synergy can enhance the catalytic performance, and a prefabricated solid precursor can guide the ordered embedding, of secondary metal source ions for the rapid synthesis of bimetallic organic frameworks (MM’-MOFs) with a stoichiometric ratio of 1:1. In this paper, Co-MOF-1D containing well-defined binding sites was synthesized by mechanical ball milling, which was used as a template for the induced introduction of Fe ions to successfully assemble the ordered bimetallic Co 1 Fe 1 -MOF-74@2 (where @2 denotes template-directed synthesis of MOF-74). Its electrocatalytic performance is superior to that of the conventional one-step-synthesized Co 1 Fe 1 -MOF-74@1 (where @1 denotes one-step synthesis of MOF-74), and the ratio of the two metal sources, Co and Fe, is close to 1:1. Meanwhile, the iron valence states (Fe II and Fe III ) in Co 1 Fe 1 -MOF-74@2 were further regulated to obtain the electrocatalytic materials Co 1 Fe 1 (II)-MOF-74@2 and Co 1 Fe 1 (III)-MOF-74@2 . The electrochemical performance test results confirm that Co 1 Fe 1 (II)-MOF-74@2 regulated by valence state has a better catalytic performance than Co 1 Fe 1 (III)-MOF-74@2 in the oxygen evolution reaction (OER) process. This phenomenon is related to the gradual increase in the valence state of Fe ions in Co 1 Fe 1 (II)-MOF-74@2 , which promotes the continuous improvement in the performance of the MOF before reaching the optimal steady state and makes the OER performance reach the optimum when the Fe II /Fe III mixed-valence state reaches a certain proportion. This provides a new idea for the directed synthesis and optimization of highly efficient catalysts.
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JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Cheng Liu,Huiling Chen,Qi Chen,Jinhong Bi,Jimmy C. Yu,Ling Wu
A series of Al 3+ -doped UiO-66(Ce) MOFs (U(Ce x Al 1−x )) was developed to reveal the roles of metal doping on active site formation and substrate activation in photocatalytic selective transformation of amines to imines. Al 3+ doping induced crystal structure distortion to form coordinately unsaturated metal (Al, Ce) sites as Lewis acid sites to chemisorb and activate benzylamine (BA). In situ FTIR revealed that the Al site with stronger acid strength facilitated BA activation. The activation degree of N–H bonds in BA was evaluated by changes of calculated force constant. The intermediate products were confirmed through time-dependent in situ FTIR. The Al 3+ -doped sample U(Ce 0.90 Al 0.10 ), the optimal catalyst, showed a significantly increased BA conversion (97.6 %) than that (47.5 %) of undoped sample, which was attributed to enough active sites and the optimal charge mobility. Finally, the present study proposes a synergistic photocatalytic mechanism associated with molecular activation to demonstrate selective oxidation pathways at the molecular level.
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LANGMUIR
·
2024
·
IF 3.7
Xu Chuan Cao,Bai Chao Zhang,Jing Cui,Chao Suo,Xiao Chuan Duan,Shao Hui Guo,Xian-Ming Zhang
Plasmonic materials are fundamental photosensitizer materials for photocatalytic reactions. Various structures, including core–shell types, satellite types, and distribution types, have been designed and prepared for the optimization of photocatalytic reactions. However, understanding the profound enhancement mechanism of various structures is still challenging. Thus, the plasmonic coverage is considered to be an index for analyzing the influence mechanism. Here, Au@Ni-MOF core–shell flower sphere-like photocatalysts are prepared, and the size of the flower sphere can be precisely regulated by varying the amount of Au. Thus, different plasmonic coverages are realized through the tuning of spheres of different sizes. The high plasmonic coverage of catalysts can enhance visible light absorption, facilitate the generation of photogenerated electron–hole pairs, and shorten the photogenerated carrier transport distance. Moreover, the exponential relationship between the photocatalytic hydrogen production performance and the plasmonic coverage can also be used as a guide for material design. As a result, a photocatalytic hydrogen production rate of 3389 μmol·g–1·h–1 is achieved in the Au@Ni-MOF sample with high plasmonic coverage, which will advance the plasmonic application in photocatalytic reactions.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Mengru Wu,Xinshu Li,Yaoyang He,Kaisu Li,Songlin Yang,Mingchang Zhu,Na Sun
The detrimental effects on human health and ecological security caused by antibiotic pollution of the aquatic environment have attracted widespread attention. The development of more effective materials is urgently needed for antibiotic removal. In this paper, a mesoporous composite of SiO 2 /UIO-66–400 was prepared via a solvothermal reaction. The synthesized SiO 2 /UIO-66–400 has a good recycling performance (four times). Adsorption kinetics can be observed that the adsorption equilibrium can be reached within 120 min. At a pH of 7.00, a temperature of 5°C and an adsorbent dose of 0.25 mg·mL −1 , the adsorption capacity of the SiO 2 /UIO-66–400 for 200 mg·L -1 ofloxacin (OFL) can be up to 77.60 mg·g −1 . The interactions at the adsorbent-adsorbate interface are multifaceted, encompassing scenarios of monolayer and multilayer adsorption. Several attractive forces such as pore filling, electrostatic interaction, hydrogen bonding, and π-π attraction are identified as the primary drivers of antibiotic from water.
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JOURNAL OF FLUORESCENCE
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2025
·
IF 3.1
Han Bo-Ming,Zhang Hao-Rui,Gao Wen-Jie,He Xi-Wen,Li Wen-You,Zhang Yu-Kui
In this work, a dual-emission material based on lanthanide metals was synthesized and used as a ratio fluorescence sensor to respond to Hg 2+ and H 2 O 2 , respectively. Tb-BDC-NH 2 as a bimetal MOFs had double ligands and exhibited double fluorescence emission peaks at 550 nm and 450 nm. The two emission peaks of Tb-BDC-NH 2 can be quenched by Hg 2+ and H 2 O 2 respectively, forming a built-in calibration signal for ratio fluorescence detection. Based on the different detection conditions of the Hg 2+ and H 2 O 2 , the simultaneous detection of the two detection substances can be achieved with simple operation. This detection system had good stability and anti-interference ability. Under optimal conditions, the detection limit for Hg 2+ detection was 0.2 µM. Meanwhile, for the detection of H 2 O 2 , the detection limit was 11 µM and large linear ranges were obtained. Through actual sample testing, it had been proven that the ratio fluorescence sensor based on Tb-BDC-NH 2 had good application prospects. And the work also provided a new idea for double substances detection.
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Advanced Healthcare Materials
·
2020
·Vol. 9
·期 14
·2000205
·
IF 7.367
Yuda Zhu,Nini Xin,Zi Qiao,Suping Chen,Lingwan Zeng,Yusheng Zhang,Dan Wei,Jing Sun,Hongsong Fan
Bioactive metal–organic frameworks (bio-MOFs) built from biofunctional metal ions and linkers show a new strategy to construct multifunctional theranostic platforms. Herein, a bio-MOF is synthetized via the self-assembling of Fe 3+ ions and doxorubicin hydrochloride (DOX) molecules. Then, through a stepwise assembly strategy, another bio-MOFs structure consisting of Gd 3+ ions and 1,3,5-benzenetricarboxylic acid (H 3 BTC) is wrapped on the surfaces of Fe-DOX nanoparticles, followed by adsorbing photosensitizer indocyanine green (ICG). Specifically, the Gd-MOF shell structure can not only act as a contrast agent for magnetic resonance imaging (MRI), but also provides protection for Fe-DOX cores, controlling the release of DOX. The photoacoustic and photothermal imaging (PAI and PTI) methods are successfully introduced to the platform by loading ICG, providing potential applications for multimodal biological imaging. The in vitro and in vivo outcomes indicate that the Fe-DOX@Gd-MOF-ICG nanoplatform exhibits outstanding synergistic antitumor performance via MR/PA/PT imaging guided chemotherapy, photothermal and photodynamic combination therapy. The work may encourage further exploration of bio-MOFs based multifunctional theranostic platforms for multimodal imaging guided compound antitumor therapy, which will open an avenue of MOFs toward biological applications.
研究领域:
生物医学工程
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纳米技术
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癌症治疗
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材料科学
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CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Xiaoxiao Xia,Meng Cao,Zhilu Liu,Wei Li,Song Li
The use of metal-organic frameworks (MOFs) for adsorption cooling has won increasing research interests due to their outstanding adsorption performance. Zr-MOFs with relatively stable water stability and distinct structure properties are potential adsorbents for cooling. In this work, three Zr-MOFs: UiO-66, UiO-67 and NU-1000 with varying pore sizes were synthesized, and their water and ethanol adsorption isotherms were measured. The specific cooling effects (SCE) and coefficient of performance (COP) of MOF/water and MOF/ethanol working pairs in adsorption cooling system (ACS) were evaluated by adsorption system modeling. The results revealed that the MOFs with small pores and low steps (P/P 0 ) (i.e. UiO-66) in isotherms are favorable for water working fluid, which can achieve high SCE and COP at relative low temperatures. In contrast, MOFs with large pores and suitable steps (i.e. NU-1000) is preferential for ethanol working fluid due to the high uptake. Although water working fluid generally exhibited higher SCE and COP than ethanol, MOF/ethanol outperformed MOF/water because the equivalent cooling performance can be achieved at low temperature as well as the high recycle stability of MOFs/ethanol working pairs.
研究领域:
材料科学
·
能源工程
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Liwei Qian,Yuxuan Yang,Tiantian Xu,Sufeng Zhang,Valentin Nica,Ruihua Tang,Wenqi Song
The acquisition of efficient protein isolation substances is vital for proteomic research, whereas it's still challenging nowadays. Herein, an elaborately designed protein imprinted material based on a bacterial cellulose@ZIF-67 composite carrier (BC@ZIF-67) is proposed for the first time. In particular, due to the ultrafine fiber diameter and abundant hydroxyl functional groups of the bacterial cellulose, BC@ZIF-67 presented a compact arrangement structure similar to a pearl necklace, which greatly promoted template immobilization and mass transfer resistance in protein imprinting technology. Therefore, the protein-imprinted material (BC@ZIF-67@MIPs) fabricated by surface imprinting technology and template immobilization strategy could exhibit ultrahigh adsorption capacity (1017.0 mg g −1 ), excellent recognition ( IF = 5.98) and rapid adsorption equilibrium time (50 min). In addition, based on the experiment outcomes, our team employed BC@ZIF-67@MIPs to enrich template protein in blended protein solutions and biosamples, identifying them as underlying candidates for isolating and purifying proteins.
研究领域:
生物化学
·
材料科学
·
蛋白质组学
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Korean Journal of Materials Research
·
2025
·Vol. 35
·期 8
·352-365
·
IF 0.3
Haixia Wang,Yilei Sun,Yao Liu,Kunjie Li,Zeda Meng,Won-Chun Oh
The catalyst materials 0N-Cu-MOF, 1N-Cu-MOF, and 2N-Cu-MOF were successfully synthesized usinga solvothermal method, and using different concentrations of nitrogen-modified Cu organic frameworks (xN-Cu-MOF). Characterizations using X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) surface area analysis showed that 1N-Cu-MOF had the largest SSA and pore size among the three materials synthesized. 1N-Cu-MOF exhibited the largest pore size and specific surface area among the three materials, which had a decisive effect on CO2 reduction. In addition, stability and CO2 reduction reaction (CO2RR) activity were evaluated by linear sweep voltmeter, cyclic voltmeter, electrochemical impedance spectroscopy, and time flow tests. Faradaic efficiency (FE) was determined by product analysis. Among the three catalyst materials, 1N-Cu-MOF showed the best catalytic performance at 50 mA·cm-2 (maximum current density). The charge transfer resistance was 8.23 Ω, the average current density was 19.9 mA·cm-2, and the FE of methane (CH4) production showed a high efficiency of 70.45 % when tested for 12 h at an overpotential of -0.35 V (to-RHE).
研究领域:
材料化学
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电化学
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环境催化
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能源材料
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纳米催化
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 19
·1466
·
IF 3.2
Valabhoju Madhuker,Pothukanuri Nagaraju,Kathirvelu Velavan,Parne Saidi Reddy
Titanium-based metal–organic frameworks (Ti-BDC MOFs) were synthesized via a solvothermal route at different temperatures ranging from 110 to 170 °C using terephthalic acid as the organic linker. The synthesized samples were systematically characterized using X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–Vis), Brunauer–Emmett–Teller (BET) surface area analysis, and thermogravimetric analysis (TGA) to investigate their structural, morphological, optical, and thermal properties. X-ray diffraction (XRD) studies revealed temperature-dependent variations in crystallinity and phase evolution, while FESEM analysis demonstrated significant morphological transformations with increasing synthesis temperature. EDX confirmed the presence of Ti, O, and C elements, validating the successful formation of the Ti-BDC framework. FTIR spectra verified the coordination between Ti metal centers and BDC linkers, whereas TGA indicated good thermal stability with framework integrity maintained up to approximately 280 °C. Ultraviolet–visible studies were employed to determine the optical band gap, and BET analysis revealed the microporous and hierarchical porous nature of the synthesized materials. Gas sensing characteristics toward n-butanol were evaluated under ambient conditions using the static liquid distribution method. Among all samples, the Ti-BDC MOF synthesized at 150 °C exhibited the best sensing performance toward 5 ppm n-butanol, showing superior response–recovery behavior, excellent selectivity, and long-term stability, with a limit of detection (LOD) of 2.66 ppm. The enhanced sensing performance is attributed to the optimized crystallinity, porous architecture, and abundant active adsorption sites that facilitate efficient gas diffusion and charge transfer processes. These findings demonstrate the potential of Ti-BDC MOFs as promising sensing materials for low-concentration n-butanol detection in environmental monitoring and workplace safety applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xi Zhang,Shuting Lian,Yue Li,Shuguang Cai,Xueqing Xiao,Xingfang Huang,Li Huang,Chan Zheng
Nonlinear optical (NLO) materials capable of efficient frequency conversion, optical switching, and all-optical signal processing are fundamental building blocks for modern photonics and quantum technologies. Herein, we report on lanthanide-based metal-organic framework (Ln-MOF) composite gel glasses, employing central metal ion engineering as an efficient strategy for tailoring their third-order NLO responses. Three isostructural Ln-MOFs based on La 3 + (4 f⁰), Ce 3+ (4 f¹), and Pr 3+ (4 f²) are synthesized and uniformly incorporated into transparent silica gel glass matrices via sol-gel processing. Combined morphological, structural, and optical investigations demonstrate the successful preparation of Ln-MOFs and their integration into composite gel glasses. Open-aperture Z-scan measurements reveal a distinct and counterintuitive trend in the nonlinear absorption coefficients (i.e., La 3+ > Ce 3+ > Pr 3+ ), which mainly originates from the central-ion-dependent charge transfer polarizability within the MOFs. The NLO performance of Ln-MOF@SiO 2 gel glasses is enhanced compared with that of Ln-MOFs owing to the matrix effect. Furthermore, the Ln-MOFs and Ln-MOF@SiO 2 gel glasses exhibit wavelength-dependent transitions from reverse saturable absorption to saturable absorption. The resulting composite gel glasses combine the molecular designability of Ln-MOFs with the optical transparency, mechanical robustness, and processability of inorganic glasses, offering an integrable solid-state platform for NLO device applications. Our work not only elucidates the dominant role of charge transfer processes in governing the NLO properties of Ln-MOF materials but also provides theoretical insights and a robust platform for the design of high-performance, integrable solid-state nonlinear optical devices.
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Molecular Catalysis
·
2026
·
IF 4.3
Kang Cheng,Yuting Hu,Tianyu Liu,Ting Cheng,Taotao Liu,Chengzhu Zhu
MOF derivative (Zr (0.9)/CuO x (400)) had excellent denitrification activity, N 2 selectivity and stability. • Systematically revealed the regulation mechanism of Zr doping on the Cu 2+ /Cu + ratio and acid balance. • Proved that Zr doping could act as sacrificial sites to greatly improve the H 2 O and SO 2 resistance of the catalyst. Zr/CuO x composite were synthesized by hot-solvent and calcination method using metal-organic framework (MOF) as the precursor, and were applied for selective catalytic reduction of NO x with NH 3 (NH 3 -SCR). The effects of Zr/Cu molar ratio, calcination temperature and time on catalyst activity and the physicochemical properties of the composites were systematically investigated. The results showed that Zr/CuO x composite revealed a favorable denitrification activity, stability and resistance to sulfur and water while Zr/Cu molar ratio was 0.9 and calcination temperature was 400 °C. When the NO concentration of 500 ppm and gas hourly space velocity (GHSV) of 35,000 h -1 , NO conversion efficiency was achieved 100% and over 94% N 2 selectivity at 275–375 °C. In the presence of 100 ppm SO 2 and 10 vol% H 2 O, the NO conversion of Zr (0.9)/CuO x (400) approached 92%. The enhanced activity was attributed to a synergistic Zr/Cu interaction that optimized the surface Cu 2+ /Cu + redox couple, enriched Cu + sites, and thereby accelerated the low-temperature “fast” SCR pathway. Moreover, doping Zr generated a larger number of well-dispersed acid sites and maintained strong reducibility across a broad temperature range, collectively providing favorable conditions for the NH 3 -SCR. Download: Download high-res image (230KB) Download: Download full-size image
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