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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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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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Jianing Li,Tao Zhang,Huixia Ma,Boning Zhang,Yan Qiao,Ying Zhang
Electronic control of nanoparticle active sites via a single-atom promoter remains challenging in heterogeneous catalysis. Here we show that spatial positioning of single-atom Zr promoters on hydroxyapatite, either surface-decorated or near-surface lattice-incorporated, possesses different electronic modulation mechanisms. Characterizations and DFT indicate that surface-decorated Zr exhibits limited electron donation to the metal while minimally perturbing the support electronic structure. Lattice-incorporated Zr induces directional charge reconstruction accompanied by support-promoter-metal electronic coupling, thereby enabling significant tuning of the electronic structure of the metal nanoparticles. In 1,2-propanediol dehydrogenation to hydroxyacetone, the lattice-incorporated architecture delivers 83% yield, and 100 h stability under optimized conditions. The same spatial-positioning principle extends beyond Cu and is reproduced in Ni/Zr-HAP and Pt/Zr-HAP. Lattice-incorporated Pt also steers cyclohexanol conversion toward deep ring dehydrogenation, enhancing phenol formation while suppressing dehydration by-products. Overall, axial promoter placement is a transferable lever to engineer interfacial charge distribution for efficient dehydrogenation.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.6
Minzhe Li,Yiwen Gui,Ao Chen,Ning Cai,Jumei Li
In this study, Ag@NU-66 core-shell composites were synthesized by coating silver nanospheres with the metal organic framework (MOF)-UiO-66-NH₂ (Zr) using a straightforward hydrothermal technique. The resulting composite combines excellent stability, high enrichment capacity, and photocatalytic properties. As a SERS substrate, Ag@NU-66 effectively detected a range of harmful contaminants, with detection limits as low as 10 −9 M, 10 −8 M, and 10 −9 M for methylene blue, rhodamine 6G, and thiram, respectively. In addition, Ag@NU-66 exhibited efficient removal of these pollutants under simulated solar light photocatalysis. The dual functionality of the composite can be attributed to the enhanced electromagnetic field created by the plasmonic properties of silver nanospheres, along with improved charge transfer facilitated by the adsorption capabilities of UiO-66-NH₂. Furthermore, the Ag@NU-66 composites demonstrated superior stability compared to bare silver nanospheres in various solvents, even in oxidative conditions containing halide ions. These findings support the potential development of Ag@NU-66-based sensing and pollutant removal systems for environmental applications.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Ke Wang,Zhaobin Tian,Na Yin
Novel cross-flow disturbance of ceramic membrane was used for the first time to enhance the adsorption of highly toxic Cu(II) onto Zr-based metal–organic frameworks (Zr-MOFs). Effects of temperature and pH were investigated on the adsorption process of Cu(II) onto the MOFs using the jar test. The results showed that the MOFs can well adsorb Cu(II) (59.8 mg g–1) at a pH of 6 and a temperature of 40 °C. On the basis of this, the MOFs were then added into a novel cross-flow ceramic membrane filtration system. Effects of the operation temperature and membrane pore size were also investigated on the adsorption process. The results showed that Zr-MOFs adsorption of Cu(II) increased with temperature. The ceramic membrane with a pore size of 200 nm exhibited better Cu(II) removal and membrane flux than did the 50 nm membrane, as well as better kinetic data fit of the pseudo-second-order model. With the aid of cross-flow disturbance of ceramic membrane, the capacity was incredibly increased to 988.2 mg g–1 at a pH of 6, temperature of 40 °C, cross-flow velocity of 4.5 m s–1, and trans-membrane pressure of 0.05 MPa. The principal advantages of this method are a significant enhancement of adsorption onto the Zr-MOFs in the removal of Cu(II) and convenient application in the continuous treatment of heavy metal wastewater. This can be used as an effective method in continuous adsorptive removal of heavy metals from wastewater.
研究领域:
环境科学
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材料科学
·
化学工程
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水处理技术
·
吸附分离
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 7
·5566-5572
·
IF 2.324
Wang Ting,Song S. -H.
Sr–Zr co-doped multiferroic BiFeO 3 powders are synthesized using sol–gel technique. The effect of Sr–Zr co-doping on the structural, magnetic and optical properties is investigated. X-ray diffraction demonstrates that the crystal structure transforms and there is no impurity phases present even in a high doping concentration. Scanning electron microscopy and transmission electron microscopy indicate that the Sr–Zr co-doping leads to a decrease in particle size with the Bi 0.80 Sr 0.20 Fe 0.95 Zr 0.05 sample having a particle size of 20–50 nm. With the Sr–Zr co-doping, the nanopowders change to be soft ferromagnetic from antiferromagnetic. The room-temperature remnant magnetization is enhanced by the co-doping, from 0.015 emu/g for the pure BiFeO 3 to 0.237 emu/g for the Bi 0.80 Sr 0.20 Fe 0.95 Zr 0.05 sample. The optical band gap shows an increasing trend with co-doping.
研究领域:
材料科学
·
凝聚态物理
·
纳米材料
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功能材料
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多铁材料
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CERAMICS INTERNATIONAL
·
2015
·Vol. 41
·期 5
·6676-6682
·
IF 2.605
Pei Peng,Ya-Ya Hu,Yong Liu,Shi Chen,Jing Shi,Rui Xiong,Yue Zhang
Magnetoelectric (ME) ceramic composites of CoFe 2 O 4 (CFO) and Pb(Zr,Ti)O 3 (PZT) with varied composition ratios were sintered using a spark plasma sintering (SPS) method. The characterization of the ceramic compositions and morphologies revealed an even distribution of the CFO and PZT phases. Physical property measurements showed that when the CFO mass percent increased from 8% to 15%, the piezoelectric constant and dielectric constant decreased monotonously, while the saturation magnetization and dielectric loss were enhanced. It was determined that a CFO mass percent of 10% or less resulted in a significant change of the polarization behaviour and a clear enhancement of the ME conversion voltage coefficient ( α E ) with an applied magnetic field . In contrast, CFO mass percentages greater than 10% had a reduced α E , and their polarization behaviour was not influenced by an applied magnetic field. With an increasing proportion of CFO in the composite, the α E first increased and then decreased. The maximum value of the α E indicated an optimal proportion of CFO (10%), which is attributed to a competition between the improved magnetostriction and deteriorating electric behaviour in the composite with the addition of CFO.
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ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Wentao Ding,Hao Li,Rui Zong,Jingyun Jiang,Xingfei Tang
The substitution of green hydrogen donors for replacing high-pressure H2 to achieve biomass derived ketone and aldehyde hydrodeoxygenation (HDO) under mild conditions has attracted widespread attention. However, it remains a considerable challenge to get rid of acid additives and control product selectivity. Herein, a series of bimetallic Pd–M/HZSM-5 catalysts (M = Zr, Mn, Zn, or La) were fabricated for controlled hydrodeoxygenation of biobased ketones and aldehydes (acetophenone, benzophenone, 4-hydroxyacetophenone, vanillin, furfural) using polymethylhydrosiloxane (PMHS) as the green H-donor, in which >99% conversion and >99% selectivity to ethylbenzene were achieved for hydrodeoxygenation of acetophenone as the probe within 3 h at 35 °C over the as-prepared 0.5%Pd–2.0%Zr/HZSM-5 catalyst with a Pd/Zr mass ratio of 1:4. According to characterizations of TEM-HAADF, XPS, ESR, and H2-TPR, the Pd–Zr alloy structure was formed on the bimetallic Pd–Zr/HZSM-5 catalyst, promoting the transform of Pd–O–Zr solid solution to PdO–ZrO2 and the generation of oxygen vacancy. Moreover, the abundant of oxygen vacancies on the alloyed Pd–Zr/HZSM-5 catalysts enhance the dissociation of silanes to provide the abundance of hydrogen protons, greatly accelerating the hydrogenation of biobased ketones and aldehydes, and then the acid site of the Pd–Zr/HZSM-5 catalyst promotes the dehydration of the intermediates (alcohols) to hydrocarbons. Furthermore, the as-fabricated Pd–Zr/HZSM-5 alloy catalyst can achieve an excellent recycling capability after six uses and exhibits universality toward various biobased ketones and aldehydes at 35 °C. The present findings provide new insights into the design of selective HDO of biomass in a green process.
研究领域:
催化
·
生物质转化
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绿色化学
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可持续能源
·
材料科学
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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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ACS Nano
·
2026
·
IF 16
Xuan Zhao,Ruilong Shao,Yiruo Yu,Zhiwen Hu,Yiting Jiang,Yilan Zhou,Zibiao Zhong,Jinping Zhou
Sepsis is a life-threatening inflammatory syndrome caused by bacterial infections, with limited therapeutic options in critical care. Lipopolysaccharide (LPS) from Gram-negative bacteria triggers sepsis by activating toll-like receptor 4 (TLR4) through myeloid differentiation protein-2 (MD-2) binding. The phosphate groups in LPS serve as key recognition elements for this interaction. This study developed a zirconium/cerium (Zr/Ce) dual-metal nanozyme with phosphatase activity that catalyzes LPS dephosphorylation, disrupting LPS–TLR4 binding to inhibit NF-κB signaling and reduce inflammation. The nanozyme incorporated l-arginine and tannic acid (TA) to enhance the LPS binding capacity, while TA modification improved the antioxidant capability, constructing a multifunctional TA-Zr/Ce nanozyme. Results show that the nanozyme effectively catalyzes LPS dephosphorylation and suppresses inflammatory cytokine release from macrophages. In septic mice, TA-Zr/Ce treatment improved organ function, reduced systemic inflammation, and increased survival rates while promoting anti-inflammatory M2 macrophage polarization. Furthermore, this study constructed a regenerated cellulose microsphere (RCM)-based hemoperfusion system for loading nanozymes and efficiently removing LPS from blood, demonstrating strong clinical translation potential. Therefore, this research provides additional approaches and tools for the clinical management of sepsis.
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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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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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