POLYHEDRON
·
2021
·
IF 3.052
Zhao-Yang Liu,Ruo-Ming Tong,Xin Chen,Yu-Teng Zhang
An amino-functionalized Zr-based metal–organic tetrahedron (denoted as ZrT-1-NH 2 ) was synthesized under solvothermal conditions. In addition, the adsorption performances of ZrT-1-NH 2 for sulfachloropyridazine (SCP) from aqueous solution were investigated. Moreover, the experimental results revealed that ZrT-1-NH 2 has adsorption performance for SCP. The adsorption kinetic data were best fitted with the pseudo second order model. Furthermore, a plausible adsorption mechanism was proposed.
研究领域:
环境科学
·
材料科学
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 10
·1-9
·
IF 2.584
Meng Ke,Li Wenhua,Tang Xingui,Guo Xiaobin,Liu Qiuxiang,Jiang Yanping
Ferroelectric materials with the typical perovskite structure are widely used in capacitors, ultrasonic devices, oil drilling, transducers, and other fields. Lead-lanthanum-zirconium-titanate ceramics co-doped with Sn and Ba , have been widely investigated. However, there is little attention has been focused on the dielectric properties of barium-lanthanum-zirconium-titanate. Thus, in this work, Sn doped Ba 0.955 La 0.03 Zr 0.02 Ti 0.98 O 3 ferroelectric ceramics were prepared via a classical high-temperature solid state reaction. Scanning Electron Microscopy (SEM) was used to observe the surface appearance of ceramics. The X-ray diffraction (XRD) patterns at room temperature, indicate that the ceramics are well crystallized. Impedance properties and dielectric properties reflect the characteristic of typical high temperature dielectric relaxation behavior. The conductive activation energy and the relaxation activation energy are obtained through the calculation of the Arrhenius law. The fitting results show that the dielectric relaxation behavior at high-temperature, was related to the oxygen defect. The electrical modulus verified the partial short-range carrier migration, also contribute to the high-temperature dielectric properties.
研究领域:
材料科学
·
固态物理
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 22
·36739-36745
·
IF 5.6
Peilin Qing,Ning Guan,Yang Yang,Huizi Qiu,Weishuang Fang,Huaicheng Xiang,Ying Tang,Jie Li,Liang Fang
Crystal structure refinement and Raman spectroscopy were performed on Ca 3 M 2 Ga 2 GeO 12 (M = Ti, Sn, Zr) garnet-structured ceramics to explore the relationships between crystal structure, phonon modes, and microwave dielectric properties . The Ca 3 Ti 2 Ga 2 GeO 12 , Ca 3 Sn 2 Ga 2 GeO 12 , and Ca 3 Zr 2 Ga 2 GeO 12 ceramics were obtained by sintering at 1325–1475 °C for 6 h, and good microwave dielectric properties were achieved: ε r = 15.04, 9.53, and 11.89; Q × f = 59,515 GHz, 49,355 GHz, and 45,587 GHz; and τ f = −47.3 ppm/°C, −52.3 ppm/°C, and −43.0 ppm/°C, respectively. M 4+ (M = Ti, Sn, Zr) cations entirely occupied the octahedral site, leading to an average underbonding between cations and anions, a weak rattling effect, and measured ε r values deviating from theoretical values. The packing fraction and Raman FWHM (A 1g mode) correlated highly with the Q × f values. The negative τ f values were derived from the large positive temperature coefficient of permittivity ( τ ε ) and the temperature coefficient of ionic polarizability ( τ αm ).
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Small
·
2020
·Vol. 16
·期 7
·1906240
·
IF 11.459
Mian Chen,Zhou Long,Ruihua Dong,Le Wang,Jiangjiang Zhang,Sixiang Li,Xiaohui Zhao,Xiandeng Hou,Huawu Shao,Xingyu Jiang
This study uses metal–organic frameworks (MOFs) alone without any added antibacterial ingredients as the nonantibiotic agent for photodynamic therapy (PDT) of chronic wounds infected by multidrug-resistant (MDR) bacteria. Nanoparticles (NPs) of MOFs (PCN-224) are incorporated with titanium through a facile cation exchange strategy. The obtained bimetallic PCN-224(Zr/Ti) shows greatly enhanced photocatalytic performance for the generation of reactive oxygen species under visible light, which is responsible for the effective antibacterial activities. The PCN-224(Zr/Ti) NPs are loaded onto lactic- co -glycolic acid nanofibers to prepare a wound dressing, which shows high biocompatibility and minimal cytotoxicity. The wound dressing is efficient for PDT-based in vivo healing of the chronic wound infected by MDR bacteria. Most importantly, this work does not involve any additional antibacterial agents, which is facile, low cost, and in particular, greatly explores the potential of MOFs as a powerful nonantibiotic agent in PDT.
研究领域:
材料科学
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纳米技术
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生物医学工程
·
抗菌研究
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DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 15
·8766-8772
·
IF 3.119
Qiuyun Zhang,Dandan Lei,Qizhi Luo,Jialu Wang,Taoli Deng,Yutao Zhang,Peihua Ma
According to the need of sustainable development, solid catalysts are critical materials for green biodiesel production. In this study, a hydrothermal method was used to develop a reusable and highly active Fe-BTC and UiO-66 metal–organic framework encapsulated Zr-doped polyoxometalate nano-hybrid catalysts (ZrSiW/Fe-BTC and ZrSiW/UiO-66) for the acid-catalyzed esterification of oleic acid with methanol. The structural and compositional characterization of the synthesized catalysts were characterized using various techniques such as Fourier transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), nitrogen adsorption–desorption, scanning electron microscopy (SEM), and thermogravimetric (TG) and temperature programmed desorption (NH3-TPD) analysis. The as-prepared ZrSiW/UiO-66 had excellent catalytic activity in the esterification of oleic acid with methanol, higher than that of ZrSiW/Fe-BTC catalyst, owing to the fact that ZrSiW/UiO-66 nano-hybrids have high acidity, large specific surface area and pore volumes, and relatively large average pore sizes. Furthermore, the reusability and stability of nano-hybrids were also evaluated, and it was found that the stability of ZrSiW/UiO-66 catalyst was better.
研究领域:
化学工程
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材料科学
·
可再生能源
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Siqi Liu,Jiawei Wang,Jiangwei Ren,Meng Zhang,Hui Mao
The contamination of fluoride is a concerned issue from the perspective of drinking water safety. Herein, we reported the controlled synthesis of novel chitosan aerogel functionalized by tannin-chelated Zr(IV), which was capable of accomplishing the high-performance adsorption of fluoride from water. The as-prepared functional chitosan aerogel (BTCA-Zr) featured fast adsorption kinetics and exceptional adsorption capability to fluoride. In static adsorption experiments, the superiority of the functional chitosan aerogels was demonstrated with the removal efficiency higher than 95% in the wide pH range of 3–10. The high porosity (79.08%) combined with surface decoration of amphiphilic tannin provided the functional aerogel with fast adsorption equilibrium in 40 min. Adsorption capacity of 86.0 mg g −1 for fluoride was achieved by the functional aerogel with the low fluoride concentration of 2.0 mg L −1 . The fluoride adsorption on BTCA-Zr exhibits pseudo-second-order (PSO) kinetics and fits the Langmuir isotherm, and the adsorption process is exothermic and spontaneous. The adsorption mechanism was revealed by adsorption experiments combined with the density functional theory (DFT) calculations, which confirmed the critical role to form the species of Zr-oxyfluoride with low binding energy for accomplishing the high-performance adsorption of fluoride. Notably, the functional aerogel achieved 85.59% of fluoride removal by column adsorption of the simulated underground water. The functional aerogel was recycled 5 times in column adsorption of the simulated underground water by retaining 78.38% of its initial adsorption capacity.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 109
·期 1
·e70407
·
IF 3.8
Yuwei Zhang,Cuiwei Li,Guangjin Chen,Chenran Zhao,Zhikun Song,Kepi Chen,Haoran Sun,Linghao Wu,Junhui Xiang
A series of (Y, Yb, Zr, Hf, Sn, W)O 2−δ high-entropy ceramics with varying mole fraction of main elements were synthesized for the first time through the solid-state reaction synthesis method. The microstructure, phase composition, and properties of the prepared materials were thoroughly analyzed and tested. The results indicate that the phase composition transformed from a single-phase fluorite structure to a single-phase C-type rare earth sesquioxide structure as the mole fraction of +3 cations increases. The thermal conductivity of the prepared high-entropy ceramics with porosity of 49.8%–50.1% is very low ranging from 0.33 to 0.37 W·m −1 ·K −1 . Among them, the single-phase C-type rare earth sesquioxide with a higher oxygen vacancy concentration was employed as a catalyst in the CO 2 hydrogenation reaction, attaining a high CO 2 conversion rate of 82.0%. The obtained results have deepened understanding of the role of oxygen vacancies and have important guiding significance for the study of high-entropy oxides with fluorite derived structures.
研究领域:
材料科学
·
陶瓷
·
催化
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能源材料
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固态化学
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Advanced Science
·
2026
·
IF 14.1
Yanmin Liang,Hongyue Ma,Feier Bai,Jing Zhang,Yan Qi,Bing Shao
The interference of phospholipids in serum poses a critical bottleneck for nontargeted human biomonitoring of chemical hazards. Here, we report a Ti-doping strategy to activate adjacent Zr sites in a bimetallic Zr/Ti metal-organic framework (B-Zr/Ti MOF) for cooperative and efficient phospholipid removal. By precisely engineering the Ti content, the optimal B-Zr/Ti MOF achieves near-complete removal of major phospholipid subclasses while maintaining high recoveries (>50%) for over 500 diverse chemical hazards, even at trace levels (10 ng mL − 1 ). Combined XPS, FT-IR, and DFT calculations reveal that Ti incorporation modulates the local electronic environment, converting adjacent Zr sites into highly active Lewis acid centers that synergistically anchor phosphate headgroups via inner-sphere coordination. When integrated into a nontargeted LC-HRMS workflow, this material dramatically reduces matrix effects and expands detectable feature coverage. This work establishes bimetallic node engineering as a powerful strategy to overcome matrix interference in exposomics and precision biomonitoring.
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PubMed
高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Ling Wang,Mei Yan,Min Li,Zheng-Yu Yang,Xian Li,Wenfeng Zhou,Ru-Ling Tang
Zirconium/hafnium fluorides have recently garnered considerable interest as potential optical materials, owing to their short ultraviolet (UV) cutoff edges. Transforming centrosymmetric (CS) structures into noncentrosymmetric (NCS) analogues through cationic regulation has proven to be an effective approach for the development of nonlinear-optical (NLO) materials. Herein, various Zr/Hf-based fluorides with different alkali-metal cations, including K8M5F28(H2O) (M = Zr(1), Hf(2)), CsNaHfF6 (3), and LiK10M6F35(H2O)2 (M = Zr(4), Hf(5)), were synthesized. 1–3 belong to centrosymmetric space groups, whereas 4 and 5, incorporating the Li+ cation with a small radius, exhibit NCS crystal structures. 1 and 2 feature chain-like anionic structures. 3 presents a zero-dimensional (0D) anionic structure constructed from isolated [HfF6]2– octahedra. Compounds 4 and 5 adopt three-dimensional (3D) anionic networks. The introduction of Li+ enhances structural distortion and dipole alignment, resulting in phase-matchable (PM) second-harmonic-generation (SHG) responses. Notably, all compounds exhibit UV absorption edges below 200 nm, confirming superior UV transparency. Overall, these results indicate that alkali-metal regulation is an efficient approach to trigger symmetry breaking while concurrently enabling SHG activity and maintaining short UV absorption edges.
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PubMed
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zhengshen Bao,Dehong Xu,Hailong Peng,Changqing Xia,Shixing Wang,Weili Li
Efficient recovery of Au (III) from aqueous wastewater is of great significance for resource utilization and environmental protection. Herein, azine-functionalized Zr-based MOFs (hereinafter referred to as AZA-Zr-MOFs) were prepared via a facile one-pot solvothermal route using 2,2'-diamino-4,4'-(4-amino-1,2,4-triazole-3,5-diyl) dibenzoyl acid as the organic linker. The abundant triazole and amino groups on the MOF surface provide multiple active sites for multi-nitrogen synergistic coordination, thus enhancing the selective capture of Au (III) in aqueous solution. The obtained AZA-Zr-MOFs exhibit a high maximum uptake capacity of 1176 mg/g for Au(III), along with remarkable selectivity and excellent cycling stability (＞90 % efficiency after 5 cycles) over a wide pH range (2.0~9.0). Combined with experimental analyses (X-ray photoelectron spectroscopy (XPS), zeta potential, Fourier transform infrared spectroscopy (FTIR)) and density functional theory (DFT) calculations, the liquid-phase adsorption mechanism of Au (III) is clarified as a synergistic effect of amino-assisted reduction (Au (III)→Au (0)), nitrogen-centered coordination on the MOF surface, and electrostatic interfacial interaction via protonated amino groups. This work provides a feasible preparation method for MOF-based adsorbents and reveals the key role of surface functional groups in the interfacial adsorption of Au (III), which has potential application value for Au (III) recovery from actual aqueous wastewater.
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JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Haoxuan Song,Yingying Zhang,Keda Guo,Ruobing Jia,Yu Jia,Chenglong Xu,Hong Ye,Qiangqiang Xu,Shengpeng Shi
Magnetic Zr/Ce bimetallic CPs were prepared by a hydrothermal method. • Partial Ce substitution for Zr reduces cost of the bimetallic nodes. • Phthalic acid ligand offers electron-rich aromatic rings for π-π stacking. • DBP uptake reaches 1061–1172 mg/g at 600 mg/L, surpassing most adsorbents. • Magnetic separation enables reuse; capacity drops <5% after five cycles. Phthalate esters (PAEs), as endocrine-disrupting chemicals with reproductive toxicity, pose significant challenges to environmental protection and food safety due to their widespread occurrence and persistence in the environment. In this study, three Zr/Ce bimetallic coordination polymers (CPs) were successfully synthesized via a hydrothermal method combined with a post-modification coprecipitation strategy, using tetrafluoroterephthalic acid (BDC-F₄) and phthalic acid (PA) as mixed ligands. Fe₃O₄ was subsequently deposited in situ to impart magnetic responsiveness to the materials. All three materials exhibited excellent adsorption performance toward dibutyl phthalate (DBP), with adsorption capacities of 1061, 1128, and 1172 mg/g, respectively, at an initial DBP concentration of 600 mg/L, which were higher than the theoretical maximum adsorption capacities of most adsorbents reported in the literature. The adsorption kinetics followed the pseudo-first-order model, while the adsorption isotherms were better described by the Freundlich and Temkin models. Thermodynamic analysis indicated that the adsorption process was spontaneous and exothermic and was predominantly governed by physical adsorption. After five consecutive adsorption–desorption cycles, the average decrease in adsorption capacity was approximately 2.7%, demonstrating excellent structural stability and reusability. This study integrates Zr/Ce bimetallic nodes with mixed-ligand functional regulation, providing a magnetically separable adsorbent design strategy for the efficient and selective removal of PAEs from complex aqueous matrices. Download: Download high-res image (248KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Gan Ye,Jinghan Wang,Chundi Li,Lei Wu,Jun Zhou,Qiuli Zhang
A solvent-free strategy for the in situ implantation ZrW nanorods within Zr-FDCA was developed. • ZrW-Zr-FDCA retained hierarchical porosity, abundant oxygen vacancies and favorable oil-water wettability. • The optimized catalyst achieved complete oxidation of 1000 ppm sulfur to sulfone at 30 °C within 16 min. • The turnover frequency reaches 365.4 h −1 at 30 °C, which is 3653-fold higher than that of Zr-FDCA. • Tungsten active sites mediate H 2 O 2 activation to produce 1 O 2 as the primary reactive oxygen species. The rational design of highly effective desulfurization catalysts holds great promise for realizing exceptional synergistic catalytic activity toward the production of clean fuels. Herein, we provide a solvent-free strategy for the in situ implantation ZrW 2 O 7 (OH) 2 (H 2 O) 2 (ZrW) nanorods within a metal–organic framework (Zr-FDCA), using renewable organic linkers and Na 2 WO 4 ·2H 2 O as precursors. The resulting ZrW-Zr-FDCA composite retains hierarchical porosity, abundant oxygen vacancies and favorable oil-water wettability, which collectively promote interfacial contact and mass transfer in the biphasic system, thereby significantly enhancing oxidative desulfurization (ODS) performance at room temperature. The optimized catalyst achieves complete oxidation of 1000 ppm sulfur to sulfone at 30 °C within 16 min and maintains 96.7% sulfur removal efficiency over seven consecutive reaction cycles. Its turnover frequency reaches 365.4 h −1 at 30 °C, which is 3653-fold higher than that of Zr-FDCA. Quenching experiment and electron paramagnetic resonance spectroscopy identify W sites as the active centers responsible for H 2 O 2 activation, generating singlet oxygen as the dominant reactive oxygen species driving the ODS process. This work not only expands the one-pot solvent-free approach to encapsulate nanorods within MOFs but also provides an effective route for advancing low-temperature desulfurization. Download: Download high-res image (215KB) Download: Download full-size image
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