JOURNAL OF CHROMATOGRAPHY A
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2026
·
IF 4
Gege Zhu,Li Qi,Bing Niu,Qi Zhang,Qin Chen,Dan Zhong,Xiaodong Sun
Metal-organic frameworks (MOFs) are promising chiral separation materials owing to their well-defined pore structures and tunable functionality. In this work, mesoporous/microporous NU-1000 was functionalized with L-Cysteine (L-Cys) via solvent-assisted ligand exchange to produce L-Cys-NU-1000, which was applied as a stationary phase in capillary electrochromatography (CEC). The resulting L-Cys-NU-1000@capillary system achieved baseline separation of five chiral amino acid enantiomers with excellent intra-day, inter-day, and batch reproducibility (RSDs < 5%). Notably, the system retained high enantioselectivity even after 100 consecutive injections. This study represents the first application of NU-1000 in chiral separation, opening new avenues for its use and laying a foundation for broader future applications. The system demonstrates distinct advantages for quality control of amino acids, offering high efficiency, robustness, and reproducible enantiomeric separation crucial for food and pharmaceutical analysis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Haileyesus Hatano Haitosa,Osman Ahmed Zelekew,Pu Chen,Daniel Manaye Kabtamu,Weimao Yan,Hong Wang,Yi-nan Wu
Fluoroquinolone antibiotics like ciprofloxacin (CIP) pose environmental risks when released into water. Herein, a visible-light-active Fe-doped NH 2 -UiO-66(Zr)@AgI Z -scheme heterostructure was prepared via an ion exchange precipitation method. By varying AgI content, reduced particle size and enhanced charge separation for efficient photodegradation was achieved. The optimum composition (Fe-UNH@AgI-20) exhibited a 95.2 % degradation efficiency toward CIP after 60 min of visible-light irradiation. It also showed high removal efficiencies for tetracycline, lomefloxacin, and Rhodamine B. Reaction kinetics followed pseudo-first-order behavior, with rate constants significantly higher than those of pristine NH 2 -UiO-66(Zr) and AgI. The catalyst maintained 85.1 % activity after cycles, indicating good stability. Scavenger tests and electron paramagnetic resonance (EPR) analyses identified holes (h + ), superoxide radical (•O 2 − ), and hydroxyl radical (•OH) as key reactive species. Fe doping enhanced visible-light absorption and created defect sites, while AgI introduction promoted charge separation and suppressed AgI photocorrosion. Under irradiation, a small fraction of Ag + was reduced to metallic Ag, forming an electron bridge that switched the initial type-II heterojunction to a Z -scheme configuration. This Z-scheme mechanism efficiently separated carriers, facilitated generation of ROS, and enabled thorough mineralization of CIP; toxicity predictions showed most products were less mutagenic than CIP, confirming reduced ecological risk. The findings demonstrate that the Fe-doped NH 2 -UiO-66(Zr)@AgI heterostructure is a promising photocatalyst for antibiotic-contaminated wastewater remediation.
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Small
·
2025
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IF 12.1
Jiajie Xu,Tenghui Jin,Wei Qu,Kaizhou Huang,Zhiyu Liu,Ping Zhang,Jiaping Paul Chen
Development of high-performance photocatalysts for persulfate activation is often limited by rapid electron–hole recombination and insufficient quantum efficiency. To overcome the challenges, electronic metal–support interaction (EMSI) structure is designed. The innovative structure has several key benefits: recombination rates are significantly reduced, charge separation is enhanced, and content of active sites and intrinsic catalytic activity are increased. ZrO 2 /Co 3 O 4 bimetallic oxides featuring a synergistic Co─O─Zr EMSI coordination are synthesized via a sol-gel method. Strong EMSI effects markedly modulate and stabilize the Co 3d electronic structure, creating an electron-rich center on Co sites to promote persulfate activation, and an electron-deficient center on Zr sites to adsorb atrazine. The Gibbs free energy analysis reveals that Zr incorporation reduces the overpotential of oxygen evolution reaction, thereby facilitating electron transfer, promoting hole consumption and suppressing charge recombination. More importantly, it promotes the generation of reactive oxygen species—predominantly via a singlet oxygen ( 1 O 2 )-dominated non-radical mechanism. The optimized catalyst achieves 97.3% degradation of atrazine (a model compound) under visible light, outperforming commercial catalysts (e.g., 4.5-fold of Co 3 O 4 ). The work elucidates the cooperative mechanism of dual-site engineering and EMSI-mediated electron redistribution, providing a rational strategy for designing efficient photocatalysts toward sustainable advanced oxidation processes.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiang Li,Xueqian Wang,Li Yuan,Langlang Wang,Yixing Ma,You Wu,Yibing Xie,Rui Cao,Yiran Xiong,Ping Ning
The lengthy processes and cumbersome operations for the separate removal of COS and H 2 S have severely limited the development of blast furnace gas recycling process. CuO exhibits excellent H 2 S oxidation performance, but weak COS hydrolysis performance; in contrast, ZrO 2 shows the opposite trend. However, the functional combination of CuO and ZrO 2 has never been used for simultaneous removal of COS and H 2 S. In this study, a Cu/Zr co-doped K@TiO 2 bifunctional catalyst was tailored to simultaneously remove COS and H 2 S. The combined COS and H 2 S capacity of this catalyst reaches 340.5 mg/g at a low temperature of 60 °C, which is much higher than those of other reported bifunctional catalysts. The microcrystal structure formed by Cu/Zr co-doping increases the specific surface area of the catalyst and promotes the adsorption of COS/H 2 S. Specifically, Zr doping increases the content of moderate basic sites and significantly improves the hydrolysis efficiency of COS. Moreover, Cu doping induces lattice distortion of TiO 2 , while CuO captures 4 s valence electrons of K to form Cu 2 O. These two processes lead to the release of lattice oxygen from TiO 2 and CuO, generating oxygen vacancies and ·O 2 − , which promotes H 2 S oxidation. By proposing a simple route for the bifunctionalization of a desulfurization catalyst, this study drives innovation in both the theory and application of simultaneous removal of COS and H 2 S.
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CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Chongfu Wu,Zhenhua Sun,Changshen Ye,Zhaoyang Qi,Jie Chen,Zhixian Huang,Ting Qiu
The development of catalysts with excellent performance in oxidative desulfurization (ODS) at room temperature will greatly facilitate the advancement of desulfurization technology. An efficient novel strategy, 4-aminopyridine molecular bridging combined with manual grinding, was presented to encapsulate HPW into UiO-66 for achieving stable loading of PW and to produce abundant defects that contribute to the formation of active complexes with strong oxidation ability. The prepared catalyst showed outstanding catalytic activity in the ODS system, achieving full desulfurization in 15 min at room temperature and a low O/S molar ratio. Further investigations reveal that the synergistic catalytic effect of the faulty UiO-66 and PW is mostly responsible for superior catalytic performance. UiO-66 rich in defects promote the decomposition of H 2 O 2 into radicals, and PW can combine with the radicals to form more stable active peroxide intermediates, then exerting the catalytic ability of ODS at room temperature. Such a synergistic catalytic mechanism provides a guide to improving the oxidation ability of PW-based catalysts at room temperature.
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ENERGY
·
2022
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IF 8.857
Xiaopeng Shi,Pan Li,Xianhua Wang,Jiande Song,Shuqi Fang,Chun Chang,Shusheng Pang
The main purpose of this work was to explore the effect of metal modified biochar and multi-catalysts on improving the quality of products by microwave pyrolysis (MVP) of biomass. Single-component catalysts and multi-catalysts were prepared by Zn/Zr impregnation methods. The prepared catalysts were evaluated by XRD , BET, FT-IR and SEM. The properties, composition and product distribution of bio-oil and bio-syngas were analyzed. The results showed that ZSM-5 obtained more bio-oil (42.16 wt%) at the expense of gas product yield, and BC obtained the highest gas yield (43.10 wt%). Zn promoted the selectivity of aromatic hydrocarbons in bio-oil, Zr could effectively improve the yield of syngas and upgrading bio-oil, respectively. Zr-modified multi-catalyst was prepared, and the highest syngas yield (91.54 vol%) and aromatic hydrocarbon products were obtained. Among them, the selectivity of monocyclic aromatic hydrocarbons (MAHs) reached 21.82%. The mechanism of MVP of biomass under the effect of Zn/Zr modified different catalysts was proposed. The study has successfully demonstrated an approach for producing high-value bio-oil and bio-syngas from microwave multi-catalyst pyrolytic system.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Ning Zhang,Dan Li,Mengyao Mu,Minghua Lu
Increasing the stability of materials and affinity to the target has always been the pursuit. In this paper, the strategy of partially fluorinated metal–organic framework materials (MOFs) was introduced into the field of sample preparation for the first time, and the potential of this method to prepare materials with improved stability and extraction performance against environmental pollutants was verified. The UiO-66-(NH 2 ) 0.58 (4F) 0.42 coating was successfully prepared on carboxyl functionalized stainless steel fiber through covalent bonding method. Owing to the introduction of F element, the UiO-66-(NH 2 ) 0.58 (4F) 0.42 coating exhibited enhanced metal node acidity, hydrophobicity and stability, thus its extraction performance for phthalates (PAEs) was higher than that of pure UiO-66-NH 2 and commercial fiber coatings. The UiO-66-(NH 2 ) 0.58 (4F) 0.42 -coated fiber was coupled with GC–MS to detect PAEs, and the wide linear range (0.03–1000 ng/L), good correlation coefficients (0.9732–0.9998) and low detection limit (0.0039–0.016 ng/L) were obtained. The established method had also been successfully applied to detection of trace PAEs in plastic bags packed milk and bottled liquor with satisfactory recoveries (83.7 ± 5.1–118.1 ± 4.1 %). This research provides a new path for the preparation of environmental pollutant enrichment and removel materials with good performance.
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NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 27
·13021-13029
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IF 3.925
Xinlei Zhang,Peng Liu,Bohan Li,Xianliang Li,Yan Xu
Hydrogen-bond driven self-assembly of carbon dot-based luminescent materials has been widely studied in the fields of sensor and optoelectronic devices. However, the uniform confinement of carbon-dots (CDs) into crystalline porous materials through hydrogen bond interactions has rarely been reported. Herein, an O-phenylenediamine (O-PD) mediated Zr-based MOF material denoted as CDs@UiO-66(COOH)2 was successfully synthesized via an efficient solvent-free synthetic method. The O-PD molecules were grafted to the structural pyromellitic acid ligands in the UiO-66(COOH)2 framework via H-bonding interactions, and during the subsequent thermal treatment process the O-PD molecules were partially decomposed and converted into luminescent CDs. The resultant CDs@UiO-66(COOH)2 composites retained the crystallinity of UiO-66(COOH)2, and the confined CDs in UiO-66(COOH)2 show excitation-independent stable green emitting properties when dispersed in a variety of solvents. The CDs@UiO-66(COOH)2 composite exhibits excellent chlortetracycline detection performance with high selectivity, anti-interference and low limit of detection (LOD = 0.102 μM) in a wide linear range of 0–100 μM. Also, it shows an excellent stimuli-response in fluorescence intensities toward pH and temperature changes. Acting as an optical thermometer, the maximum relative temperature sensitivity (Sr) is 0.82% °C−1 in the range of 10–80 °C. This work opens a new way for exploring fluorescent CD-integrated MOF composites via a hydrogen-bond driving strategy for multifunctional fluorescent sensing applications.
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ACS Applied Materials & Interfaces
·
2022
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IF 10.383
Jinjie Hou,Pei Jia,Kairong Yang,Tong Bu,Shuang Zhao,Longwen Li,Li Wang
As a special heavy metal ion, copper ions (Cu2+) play an indispensable role in the fields of environmental protection and safety. Their excessive intake not only easily leads to diseases but also affects human health. Therefore, it is particularly important to construct a facile, effective, and highly selective Cu2+ probe. Herein, a novel Zr–tetraphenylporphyrin tetrasulfonic acid hydrate (TPPS) metal–organic framework (ZTM) was fabricated using TPPS as the ligand and exhibited strong red fluorescence with a high quantum yield of 12.22%. In addition, we designed a ratiometric fluorescent probe by introducing green fluorescein isothiocyanate (FITC), which was not subject to environmental interference and had high accuracy. When exposed to different amounts of Cu2+, the fluorescence emission at 667 nm from ZTMs is remarkably quenched, while that at 515 nm from FITC is enhanced, accompanied by a change in the solutions’ fluorescence color from red to green under a UV lamp. Besides, the ZTMs solutions display an excellent ratiometric colorimetric response for Cu2+ and produce an obvious color change (from green to colorless) that is visible to the naked eye. The fabricated ZTMs@FITC fluorescent probe exhibits distinguished performance for Cu2+ detection with linear ranges of 0.1 to 5 μM and 5 to 50 μM, as well as a low detection limit of 5.61 nM. Moreover, a colorimetric sensor based on ZTMs exhibits a good linear range from 0.1 to 20 μM for Cu2+ with the detection limit of 4.96 nM. Furthermore, the dual-signal ratiometric sensor has significant specificity for Cu2+ and is successfully applied for monitoring Cu2+ in water samples, which proves its practical application value in the environment and biological systems.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Ze Zhu,Xiaoqian Zhang,Ying Peng,Zhenfeng Guo,Yongshuai Xie,Benxue Liu,Guanghui Zhang,Luyi Zhu,Xinqiang Wang,Yonggang Jiang,Jian Feng
Rare earth zirconates have incomparable chemical thermophysical properties , yet the difficulty of preparation methods limit their application as fibrous material. In present work, a spinnable La 2 Zr 2 O 7 precursor, named as carboxylate lanthanum-zirconium (COLZ), was developed using carboxylic acids as structural and functional ligands. When COLZ is in its liquid state, it can be readily processed into desired shapes, allowing preparation of high aspect ratio precursor fibers with dense and bonding-strong internal structures. The spinnability was explained by the transformation from solid to liquid state under external forces, in which dynamic bridging of carboxylate and hydroxyl between nano-sized colloidal particles play a key role. Due to weakly acidic ligands, organics in COLZ can be easily removed, making direct heat treatment at the target temperature possible, which is beneficial for massive production. The strategy of developing spinnable precursor could also be applied to prepare other rare earth zirconate fibers or new multi-oxide fibers.
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Catalysis Science & Technology
·
2021
·Vol. 12
·期 3
·894-905
·
IF 6.119
Jihui Yao,Yuzi Rong,Zeyan Gao,Xiaohua Tang,Fei Zha,Haifeng Tian,Yue Chang,Xiaojun Guo
To introduce a hierarchical porous structure into SAPO-34 zeolites and adjust their acid properties and crystalline size, a series of Zr-modified SAPO-34 zeolites (Zrx-SAPO-34 (x = 0.25, 0.50 and 0.75)) with hierarchical porous structure were synthesized by hydrothermal crystallization using palygorskite as a silicon and partial aluminum source, morpholine and tetraethylammonium hydroxide as organic structure directing agents and UiO-66 as a co-template agent. The obtained catalysts were characterized via XRD, SEM, TEM, EDX, N2-adsorption–desorption, NH3-TPD, FTIR, Py-IR, XRF, 29Si MAS NMR and TG analyses. The catalytic performance of Zrx-SAPO-34 in the methanol-to-olefin (MTO) transformation was investigated in a fixed bed reactor. The introduction of a hierarchical porous structure effectively enhanced the diffusion and mass transfer of the reactants/products, prolonging the catalytic lifetime. Additionally, the optimization of the acidity dramatically improved the selectivity for light olefins. Under the reaction conditions wherein the reaction temperature was 400 °C, the feed of WHSV was 2.0 h−1, the mass of the catalyst was 0.5 g and at atmospheric pressure, the Zr0.50-SAPO-34 zeolites exhibited optimum catalytic performance, where the methanol conversion was 100%, the light olefin selectivity was 98.66% and the catalytic lifetime was more than 1500 min.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Jun Yao,Ming Xie,Yang Li
In order to protect human health from the threat of excessive acrylamide in heat-processed foods, swift, uncomplicated, highly selective and sensitive online monitoring methods for acrylamide are urgently needed. In this study, a rare earth metal/transition metal-organic frameworks Eu/Zr-MOFs fluorescence sensor with dual-band luminescence was prepared by the solvothermal method for detection of acrylamide in fried potatoes and cookie crumbs. This sensor exhibited two different fluorescence emission peaks at 430 and 615 nm under excitation of 365 nm, and the ratio of fluorescence intensity was linear with the experimental concentration of acrylamide in the range of 1 × 10 −4 to 1 × 10 −3 M. Under the optimal conditions, the proposed fluorescence analysis method showed that the detection limit of acrylamide was as low as 2.4 × 10 −8 M, and the satisfactory recoveries of 94.05–104.04% were obtained for various spiked samples. More importantly, the sensor has ultra-high selectivity for the detection of acrylamide while other small organic molecules hardly interfere with it in the measurement environment. These studies confirmed that the ratiometric fluorescence sensing method was expected to achieve on-line rapid detection of acrylamide in real foods. In addition, the mechanism of Eu/Zr-MOFs sensing of acrylamide was analyzed and discussed in depth, and the analog computation was carried out by Materials Studio software, and the entire sensing system was studied at the micro level in combination with density functional theory.
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