Chem
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2024
·
IF 19.1
Xiaoze Wang,Xia Wang,Jianxin Song,Hongliang Bao,Mengjia Yuan,Yanlong Wang,Lingxin Kong,Wei Liu
Developing materials capable of converting high-energy photons into visible (vis) or ultraviolet (UV) light serves as an effective approach for achieving X-ray detection and imaging. In this work, highly luminescent metal-organic gel (MOG), YTU-G-1, was obtained by self-assembling the aggregation-induced emission luminogen (AIEgen)-functionalized ligand and Zr oxo-hydroxy clusters via a mild solvothermal method. The dense and rigid MOG skeleton offers the opportunity to maximize the AIE effect, achieving near-unity quantum efficiency of 95.5%. Under X-ray irradiation, YTU-G-1 exhibits bright luminescence and can detect low-dose radiation down to 44 nGy s −1 . The robust Zr–O bond imparts the material with excellent chemical and physical resistance, making it an ideal candidate for fabricating large-area flexible membranes. Consequently, the spatial imaging resolution of the flexible scintillating membrane reaches 20 lp mm −1 . This work offers a general strategy for fabricating scintillators based on MOGs and facilitates the construction of flexible X-ray imaging membranes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lihua Liu,Miao Zhang,Luqing Zhang,Yizhen Song,Lin Sun,Pengtao Ma
Photoresponsive functional materials, especially photochromic materials, have recently emerged as critical players in advancing cutting-edge optical applications. Herein, a Dawson-type Zr-substituted phosphotungstate, [NH 2 (CH 3 ) 2 ] 6 H 3 [( α 1 -P 2 W 17 O 61 )Zr(HCIT)]·9H 2 O ( 1 ; H 4 CIT = citric acid), was synthesized from a hexavacant precursor [H 2 P 2 W 12 O 48 ] 12− via a conventional solution method. A notable feature of compound 1 is that the substitution site of the polyanion [( α 1 -P 2 W 17 O 61 )Zr(HCIT)] 9− is positioned at the equator of the Dawson structure. This sharply contrasts with the previously reported polar substitution sites. Compound 1 was systematically characterized by IR, PXRD, XPS, UV, 31 P NMR and TGA. This compound possesses conspicuous photochromism with the half-life (t 1/2 ) achieved 0.140 min. The in vitro cytotoxicity assessment of compound 1 revealed minimal toxic effects on the normal cell lines NIH-3 T3 (mouse embryonic fibroblasts) and AML-12 (mouse normal hepatocytes). Even at a high concentration of 80 μg/mL, cell viability remained greater than 90 %. Additionally, a photochromic composite film GEL/TEG/ 1 was prepared by incorporating 1 into a triethylene glycol (TEG) and gelatin (GEL) matrix. The GEL/TEG/ 1 composite film exhibited a pronounced color change within 30 s of UV irradiation (λ = 365 nm) and reached saturation in 6 min. Photochromic films demonstrate rapid, light-induced patterning capabilities that enable facile image formation without conventional printing processes. The photopatterned images on the film demonstrated reversible behavior, with complete erasure occurring within 3 h under ambient conditions. The GEL/TEG/ 1 film demonstrated excellent cycling stability, maintaining reproducible coloration–decoloration behavior over at least 10 consecutive cycles without significant performance degradation. The GEL/TEG/ 1 film demonstrates potential for applications in ink-free patterning and advanced anti-counterfeiting technologies, leveraging its reversible photochromic properties.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Yu-Teng Zhang,Jing- Yu Sun,Jian Li,De-Sheng Wei,Wan-Yi Lan,Nan Lv,Shuang-Bao Li
This study reports one-pot microwave-assisted solvothermal synthesis of Ti-Zr bimetallic organic cages (TiZrT-BTC-α, where α denotes the actual Ti molar percentage and T represents the tetrahedral cage structure). The reaction employed zirconocene dichloride (Cp 2 ZrCl 2 , Cp = η 5 -C 5 H 5 ), titanocene dichloride (Cp 2 TiCl 2 ) and 1,3,5-benzenetricarboxylic acid (H 3 BTC) as solid precursors to form a V 4 F 4 (V = vertex and F = face) coordination tetrahedron. The presence of the characteristic Ti-O vibration band at 420 cm -1 in the FT-IR spectrum, along with the characteristic Ti 4+ band signal at 458.6 eV in the XPS spectrum, collectively demonstrates the successful incorporation of titanium into the molecular cage structure. Notably, the introduction of titanium endowed the material with visible light absorption capability and modulates its electronic structure, reducing the band gap value from 3.73 eV (ZrT-BTC) to 2.48 eV (TiZrT-BTC-7.9). The photocatalytic activities of TiZrT-BTC-α were evaluated using tetracycline hydrochloride (TC) as a target pollutant under visible light illumination. Among the series, TiZrT-BTC-7.9 demonstrated excellent photocatalytic activity, achieving 92.17% degradation efficiency for TC (20 mg/L) within 3 hours. Electron spin resonance (ESR) spectroscopy combined with radical trapping experiments identified superoxide radicals (·O 2 - ) served as the dominant reactive species. This work paves the way for developing cage-based photocatalysts with tunable optoelectronic properties.
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FUEL
·
2025
·
IF 7.5
Huanhuan Gao,Daolun Liang,Yadong Sun,Jianzhong Liu
To address space constraints in solid rocket motors, this study investigates Al–Ti, Al–Zr, and Al–Mo alloys. Their high density enhances energy release per unit volume. Multidimensional analyses—thermal oxidation behavior, ignition/combustion characteristics, and agglomeration properties—were conducted to elucidate how high-density alloys influence Al-based propellant combustion performance and energy release. Results show these high-density alloys exhibit shorter ignition delay time and combustion time, effectively increasing the propellant burning rate of propellants while reducing the pressure exponent. Titration measurements reveal combustion efficiencies of 84.28% (A), 87.33% (AT), 86.79% (AZ), and 85.91% (AM). Among them, Al–Zr demonstrates the most significant optimization effect on combustion performance. Due to the low ignition threshold, Al–Ti significantly suppresses agglomerate formation and accelerates the combustion. Meanwhile, Al–Mo enhances the transport efficiency of oxidizing gases through the phase-change sublimation mechanism of MoO 3 , indirectly boosting combustion efficiency. Furthermore, this work reveals the synergistic mechanisms by which high-density alloys optimize propellant combustion performance via multiple factors. The findings confirm the technical feasibility of simultaneously achieving superior combustion performance, high energy output, and effective agglomeration suppression, providing theoretical and technological guidance for developing advanced high-energy-density solid propellants.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Miaomiao Tian,Haochen Shen,Cheng Chen,Libo Zhao,Wei Yu,Bisheng Li,Leihong Zhao,Hongjun Lin,Liguo Shen
A controllable secondary growth repairs stress cracks in MOF membranes. • Capillary-driven precursors enable in situ nucleation and epitaxial crack healing. • Post-healing generates dense, crack-free, hydrophilic and charged layers. • Repaired membranes achieve high rejection and ultrahigh water flux simultaneously. • XDLVO analysis shows that repulsive interactions improve membrane antifouling. Metal–organic framework nanosheet membranes are promising for next-generation separations but remain limited by stress-induced cracking during fabrication and operation, which compromises structural integrity and separation reliability. Here we report a secondary growth strategy to heal cracks in membranes assembled from two-dimensional Zr-MOF nanosheets while enhancing structural robustness and separation performance. Capillary forces draw precursor solutions containing metal ions and organic linkers into preexisting stress-induced cracks. The subsequent secondary growth infills these defects, healing the cracked regions and restoring a dense, continuous selective layer. This post-fabrication repair strengthens intercrystalline connectivity without introducing thick sealing layers that impede water transport, thereby recovering both high solute rejection and permeability. Crack healing and membrane densification are achieved at an optimal nanosheet loading, whereas excessive loading leads to stress accumulation and renewed structural instability. The optimized membranes exhibit a continuous crack-free selective layer with increased thickness, enhanced hydrophilicity, and a higher negative surface charge. Compared with the primary Zr-MOF membrane (P-Zr-MOF), the repaired membrane (SG-Zr-MOF) achieves a tannic acid rejection of 96.8% with a water flux of 481.9 L m −2 h −1 bar −1 , together with improved mechanical flexibility and antifouling performance. This strategy couples defect repair with performance enhancement and provides a practical route for developing stable and efficient MOF membranes for sustainable water treatment. Download: Download high-res image (190KB) Download: Download full-size image
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Nan Wu,Bao-Xu Jiang,Jing-Yu Sun,Bo Jiang,Yu-Rong Liu,Yu-Teng Zhang,Nan Lv,Shuang-Bao Li
● Zr-based MOC/PAN composite beads was fabricated by a phase inversion method. ● ZrT@PAN-0.5 beads achieved 97.68% ± 2.31% removal efficiency for methyl orange. ● Adsorption mechanism was mainly attributed to electrostatic interactions and pore volume. ● This research pioneers Zr-MOCs as fillers in composite beads for pollutant removal. The demand for synthetic dyes has continuously increased due to their wide application in industrial coloration. However, the discharge of dye-containing wastewater poses significant risks to both ecosystems and human health. In the present study, zirconium-based metal-organic cages (Zr-MOCs) were incorporated into polyacrylonitrile-based beads via a facile phase-inversion method, yielding a series of Zr-MOCs@PAN composite beads. The adsorption performance of the composite beads for methyl orange (MO) was evaluated via batch adsorption experiments. The key factors affecting adsorption performance, such as the loading ratio of Zr-MOCs, adsorbent dosage, initial dye concentration and solution pH, were systematically investigated. The results demonstrated that ZrT-1 integrated composite beads exhibited an adsorption capacity of 48.62 ± 1.72 mg/g for 40 mg/L MO at pH = 5 (removal efficiency reached 97.68% ± 2.31%), which was significantly higher than that of pristine PAN beads. The adsorption driving force for MO was mainly attributed to the synergistic effect of electrostatic interactions, pore volume, and hydrogen bonding interactions between the zirconium cages and MO. This work provides a versatile route to fabricate MOC-functionalized composite beads, exhibiting promising potential for dye removal from wastewater. Download: Download high-res image (136KB) Download: Download full-size image Novel composite beads were constructed by embedding Zr-based metal-organic cages into a PAN matrix, exhibiting efficient removal behavior for dye pollutants.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 12
·118358
·
IF 6.3
Qiu Zhang,Liying Pan,Xueyue Lyu,Chenyang Zhang,Xinrui Wang,Jiawei Qi,Guangdong Zhao
The hierarchical porous architecture of sugarcane peel was successfully replicated using a biological template method. The samples were fabricated via a sol-gel process combined with ambient pressure drying, and the Si-Zr-Al-Y system integrated with the biomass template was pyrolyzed at temperatures ranging from 700 °C to 1300 °C to obtain Si-Zr-Al-Y oxide ceramic composites. The evolution of the microstructure and phase composition of the Si-Zr-Al-Y system during pyrolysis was systematically investigated. The incorporation of biomass templates facilitated the retention of a relatively fine mesoporous structure (6.88 nm) and low thermal conductivity (0.035 W·m⁻¹·K⁻¹) up to 1100 °C, although pore coarsening and specific surface area reduction became evident at higher temperatures (1300 °C). Furthermore, the influence of processing temperature on specific surface area, pore size, and pore structure was examined in detail. This study not only establishes a foundation for future research but also provides insights into sustainable industrial waste management and contributes to global sustainable development strategies.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chao Tang,Ziyu Li,Jun Zhao,Hang Yang,Weizheng Jia,Wencan Cheng,Xuan Li,Xin Xia,Wangjing Ma
Zr-Zn/ZnO catalyst was synthesized for microwave-assisted PET glycolysis. • Atomic-level Zr incorporation regulates Zn coordination environments and Lewis acidity. • Near-quantitative recycling of PET waste was achieved. • Synergistic Zn Zr sites facilitate PET glycolysis toward high-purity BHET (99.8%). • This strategy can potentially be applied to diverse real-world PET waste. Closed-loop recycling of polyethylene terephthalate (PET) into bis(2-hydroxyethyl) terephthalate (BHET) monomers represents a promising approach to plastic waste valorization, yet its application is constrained by low monomer purity and limited feedstock compatibility. Herein, a high-performance Zn-Zr/ZnO catalyst was synthesized via a simple impregnation method. Under microwave-assisted glycolysis conditions, this catalyst enables the conversion of PET to BHET with a yield of 94.2% and purity of 99.8%. The system demonstrates stable recyclability over 10+ reaction cycles and reduces energy consumption by 60% in the depolymerization process compared with conventional electric furnace-based thermal catalysis. The recovered BHET can be repolymerized into a PET-like polymer, establishing a closed-loop material cycle. Notably, the method achieves efficient monomer conversion across a range of real-world PET plastics and fiber products, with successful implementation in a 150-g scale-up experiment. Mechanistic studies indicate that Zr and Zn species synergistically promote PET depolymerization to BHET. This work presents an efficient and stable route for high-value closed-loop recycling of waste PET, which could support the advancement of the plastic circular economy. Download: Download high-res image (317KB) Download: Download full-size image
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.9
Yanyun Ju,Qimeng Zhang,Tingqiang Lin,Rui Feng,Zehong Wang,Bowei Liu,Ling Zhou,Lijie Dong
Poly (amide acid) acts as an interfacial mediator via hydrogen bonding. • PZT content is increased by 2.8 times with an optimized PAA concentration of 8 wt%. • Sintered flexible GFF/PZT composite forms a continuous piezoelectric ceramic network. • The flexible sensor achieves high sensitivity and excellent durability. Flexible piezoelectric composites have attracted increasing interest for sensor applications. However, for flexible fiber-based piezoelectric composites, constructing a continuous ceramic network with high loading and robust interfacial bonding on the fiber fabric remains challenging. In this study, we fabricated flexible glass fiber fabric (GFF)/PZT piezoelectric composites. Poly (amide acid) (PAA) was introduced as a molecular mediator on the GFF, where PAA forms hydrogen bonds with the hydroxyl group and acetate groups of the PZT sol, enabling a 2.8-fold increase in PZT loading at an optimized PAA concentration of 8 wt%. The resulting GFF/PZT composite exhibits a continuous ceramic phase and retains good flexibility with a minimum bending radius of 15 mm. After encapsulation with interdigitated electrodes via epoxy resin (Ep), the GFF/PZT/Ep sensor achieves a minimum bending radius as low as 2.5 mm and exhibits enhanced electrical properties: a dielectric constant of 147, a low dielectric loss of 0.01 at 10 3 Hz, and an inverse piezoelectric coefficient of 119.5 p.m./V. As a bending sensor, it delivers a high sensitivity of 7.52 V per unit flexural strain and excellent durability over 1000 cycles. As a vibration sensor, it attains a sensitivity of 211.16 mV/g at 10 Hz and maintains stable output over 10,000 cycles. This work offers a promising strategy for developing flexible piezoelectric composites for energy conversion applications. Download: Download high-res image (1MB) Download: Download full-size image
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 6
·e70904
·
IF 4.2
Xinzi Zhong,Quanneng Zhang,Ji Zou,Keyu Gong,Zhipeng Zhang,Jingjing Liu,Huayue Liang,Shuaihang Qiu,Weimin Wang,Zhengyi Fu
Multicomponent oxide ceramics yield great promises in next-generation thermal protection systems according to their high potential for thermal stability and ablation resistance, but their protective mechanisms remain unclear. In this study, the five multicomponent A 6 B 2 O 17 (A = Zr, Hf; B = Nb, Ta) oxide ceramics with different atomic concentrations, respectively, at A- and B-sites, were prepared via a solid-state reaction with a rapid cooling process. Their phase, structural evolutions, and the properties under high-temperature treatment and dynamic ablations were investigated to reveal thermal stability and anti-ablation mechanisms. Only the (Hf 1/2 Zr 1/2 ) 6 (Ta 1/2 Nb 1/2 ) 2 O 17 with equal molar ratio both at A- and B-sites maintained the A 6 B 2 O 17 phase after heat treatment at 1773 K for 25 h; the other samples underwent phase separation behaviors. In addition, the (Hf 3/4 Zr 1/4 ) 6 (Ta 2/3 Nb 1/3 ) 2 O 17 ceramic showed excellent ablation resistance (∼2500 K, 100 s) with the thinnest oxide layer. This property is attributed to the formation of “skeleton-filler phase” protective composite layer, as the (Zr, Hf)O 2 “skeleton” owns high melting point and low volatility to resist thermal gas erosion, and the A n B 2 O 2n+5 family fills defects and hinders the penetrations of O 2 . This study expects to offer design for advanced thermal barriers suitable for the next-generation hypersonic vehicles and reusable spacecraft.
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高影响因子
Applied Materials Today
·
2026
·
IF 7
Junjian Yu,Xiangwei Li,Zhe Wang,Xiang Pei,Zetong Fan
Cu ions were introduced into defect sites of UiO MOF via post-functionalized modification. • The Cu-functionalized defective MOF synergistically improved gas separation performance of MMM under high pressure. • Experiments/simulation revealed the CO2 transport pathway, offering a new defect-engineered MOF design idea for separation. The incorporation of defect engineering in a metal-organic framework to prepare advanced MOF/Polymer mixed matrix membranes for CO 2 separation has become a new direction. However, the existence of defect engineering inevitably loses the selectivity enhancement of specific gas pair separation performance while opening the convenient door for gas diffusion. Herein, introducing Cu ions towards the UiO MOF defect to prepare functionalized defective UiO MOF materials. The Cu ions with CO 2 affinity maximize the proportion at the interface with the zirconia node, thus giving the material a higher CO 2 absorption capacity at high pressure. The prepared mixed matrix membranes (Cu/UiO-H 2 O/Pebax) break through the "trade-off" effect under high pressure (580.0 psi) and realize the synergistic improvement of CO 2 permeability and selectivity. Compared with low pressure (14.5 psi), the CO 2 permeability of Cu/UiO-H 2 O/Pebax mixed matrix membranes increased nearly two times, and the CO 2 /N 2 selectivity increased nearly 3.5 times. A thorough combined permeation test experiment/simulation characterization revealed the influence of the CO 2 transport pathway within the membrane, indicating the mechanism of Cu/UiO-H 2 O fillers on the permeability of mixed matrix membranes at high pressure. Notably, the post-functionalized of mixed matrix membranes with defect-engineered MOF materials provides a new idea for designing defect-engineered MOF materials in the separation field. Download: Download high-res image (247KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yunian Chen,Zhufu Fu,Dewei Zhang,Zeyu Wu,Shanshan Gao,Boyu Han,Junyu Pan,Xi Gao,Shenghong Ju,Yuan Xue
Cu/ZnAl 2 O 4 is a promising alternative to conventional Cu/ZnO/Al 2 O 3 (CZA) catalysts because its higher structural stability suppresses sintering-induced deactivation. However, its performance remains limited by weak metal-support interaction (MSI). Here, Zr was incorporated into the ZnAl 2 O 4 support to regulate the interfacial electronic structure and create defect sites. The optimized catalyst, containing 6 wt% Zr in the support and 8 wt% Cu, achieved a methanol space-time yield of 310.61 g MeOH /kg cat /h at 260 °C, 38% higher than that of the Zr-free sample. It also showed much higher Cu-based activity and stability than CZA. Combined characterizations and DFT calculations reveal that Zr strengthens MSI, suppresses Cu sintering, increases surface oxygen vacancies, and enhances Cu + /Cu 0 synergy, thereby promoting the formate pathway and lowering the barrier of the rate-determining step, which leads to improved methanol synthesis performance.
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