Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 2
·121778
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IF 7.5
Jian-Bo Qu,Guo-Yu Yue,Jian-Ling Zhang,Yuan Yang,Dong Wang,Jia-Le An,Jing Li
The excellent catalytic performance of noble metal nanoparticles (NMNPs) is often hampered by their tendency to agglomerate and poor recyclability, which significantly limits their large-scale industrial use. To address these challenges, anchoring NMNPs onto porous supports has been proposed as an effective strategy, as it not only suppresses their migration and agglomeration but also enhances their catalytic stability and recyclability through strong metal–support interactions. In this study, novel poly (glycidyl methacrylate) @ZIF-8@Au (PGMA@ZIF-8@Au) composite microspheres were fabricated via three steps: gigaporous PGMA microspheres were first prepared via suspension polymerization, followed by the in-situ growth and subsequent etching of ZIF-8 on their surface, and finally, the confined loading of gold nanoparticles (AuNPs) with three different sizes. This designed structure effectively mitigates issues such as nanoparticle aggregation, detachment, and mass transfer limitations. The hierarchical pores of the PGMA microspheres provide a high specific surface area and abundant active sites, while the rich epoxy rings create an electron-rich environment that facilitates electron transfer to the AuNPs. Moreover, ZIF-8 improves the structural stability and biocompatibility of the composite microspheres and promotes the uniform dispersion of AuNPs. The resulting catalyst achieved 100 % degradation of p-nitrophenol (PNP) within 20 min and maintained a conversion of 84.8 % after ten consecutive cycles. Based on the synergistic effects between the composite and the AuNPs, a plausible catalytic mechanism was proposed. This work offers a promising strategy for designing highly efficient catalysts for environmental remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Guoqing Chen,Zhongchen Ma,Wenli Gu,Pu Liu,Tian Lan,Yong Lu
The direct production of sustainable aviation fuel (SAF) through Fischer−Tropsch synthesis (FTS) has garnered significant interest within the energy and petrochemical sectors. However, attaining high SAF selectivity remains a critical hurdle, as the inherent maximum selectivity for the C 8 −C 16 hydrocarbon fraction in traditional FTS process hovers around 41%. Here, we report a promising bifunctional catalyst system for FTS to SAF, featuring cobalt nanoparticles (Co NPs) embedded within amorphous silica (Co@ x Si) integrated with ZSM-5 zeolite. The optimal catalyst system was identified by combining Co@ 3 Si derived from an APTES-infused ZIF-67 (with a 3:1 mass ratio of APTES to ZIF-67) with two mass fractions of a ZSM-5 (Co@ 3 Si& 2 Z5). This formulation achieved a 75.2% selectivity to C 8 −C 16 hydrocarbons with an iso-paraffins proportion of 24.3%, while effectively minimizing CH 4 formation to 6.3%. It also sustained a high CO conversion of 85.1% and was stable for at least 168 h. The Co@ 3 Si, leveraging its abundant active cobalt sites and distinctive confined structure, not only improved CO adsorption and activation but also extended the residence time of −CH x intermediates on the surface of Co NPs, thereby efficiently facilitating the formation of long-chain hydrocarbons. The ZSM-5 zeolite facilitated the selective catalytic cracking and isomerization of long-chain hydrocarbons, effectively converting them into SAF-range paraffins. The collaborative synergy between the two core components forms an efficient catalytic process akin to an assembly line, enabling the highly selective direct transformation of syngas into SAF.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Haoyue Deng,Lizhe Li,Hao Li,Qianguo Fan,Jikuan Cheng,Tiehu Li,Alei Dang,Yongkang Han
To overcome the challenges of particle agglomeration and insufficient stability of ZIF-8 under high-temperature and high-humidity conditions during CO 2 capture, this study developed a ZIF-8/urea-modified graphene oxide (GO) composite and systematically investigated its microstructure, CO 2 adsorption and separation performance, and stability. The results demonstrate that urea-modified GO is uniformly dispersed within the ZIF-8 in a highly exfoliated state and enables the formation of a microporous-mesoporous hierarchical pore structure through synergistic interaction. At 273 K and 101 kPa, the composite achieves a CO 2 adsorption capacity of 2.36 mmol/g and a CO 2 /N 2 selectivity of 24.6, showing 40.5% and 62.9% enhancements compared with pristine ZIF-8. Due to the synergistic effect between urea-modified GO and ZIF-8, the composite exhibits notable improvements in thermal, adsorption-desorption cycling, and moisture stability. This work provides both experimental data and theoretical insights for the rational design of high-performance adsorbents tailored to practical flue gas CO 2 capture applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.5
Amatjan Sawut,Yurou Feng,Rena Simayi,Manfang Pan
Heavy metal ion pollution in wastewater, particularly Cu 2+ contamination, threatens ecology and human health, demanding efficient adsorption materials in environmental remediation. However, conventional adsorbents suffer from insufficient capacity, poor mechanical stability, weak selectivity, and low reusability, restricting their practical application. Herein, a semi-interpenetrating network composite hydrogel (ZIF-8-AVA) was fabricated via in situ self-assembly, integrating ZIF-8 nanocrystals into a poly(acrylamide- co -vinylimidazole)/sodium alginate (AVA) matrix. Vinylimidazole units served as nucleation anchors, firmly immobilizing ZIF-8 on the polymer backbone via metal-ligand coordination to form a stable system. ZIF-8 significantly enhanced AVA's mechanical properties and Cu 2+ adsorption performance: the composite followed the Langmuir monolayer adsorption model with a maximum adsorption capacity of 355.9 mg/g, achieving 93.81% Cu 2+ removal efficiency at an initial concentration of 50 mg/L. Furthermore, the ZIF-8-AVA hydrogel exhibited excellent selectivity for Cu 2+ in multi-competing-ion systems and maintained high adsorption efficiency after 5 consecutive adsorption-desorption cycles. The key innovation lies in the in situ self-assembly strategy that realizes the intimate integration of ZIF-8 with the hydrogel matrix via coordination-driven anchoring, overcoming the common issue of MOF particle leaching and synergistically enhancing adsorption capacity, selectivity, and mechanical stability. This work offers a novel approach for tunable MOF hydrogels, with great potential in heavy metal wastewater treatment.
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PubMed
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FOOD CHEMISTRY
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2026
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IF 10.4
Weili Ye,Lihan Deng,Jin Li,Chu Chen
Accurate detection of ammonia (NH 3 ) is a key indicator for evaluating the deterioration of high-protein foods and is of great significance for food safety. In this study, we modified Sn-ZnO using a Co-based metal–organic framework (MOF) material (ZIF-67) to prepare cauliflower-shaped Sn-ZnO/ZIF-67 (SZZ67) for NH 3 sensors at room temperature (25 °C). By regulating Co 2+ , it was found that the sensor's response to NH 3 decreased with the increase in Co 2+ content, while the desorption ability was significantly enhanced. When the mass ratio of Sn-ZnO to the added C 4 H 6 CoO 4 ∙4H 2 O was 1:1, its response was 13.46 times that of Sn-ZnO, the response/recovery time was 63.78/7.99 s, and good moisture resistance was observed. Density functional theory (DFT) confirmed that SZZ67 can adsorb more NH 3 and release more conductive electrons, thereby increasing its response value. The sensors prepared using SZZ67 could more effectively monitor NH 3 , which is applicable for monitoring the freshness of soy products.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·
IF 11.3
Wei Wen,Chunying Wang,Xudong Chen,Jingyi Wang,Fei Wang,Kai Li,Yan Zhang,Yaobin Li,Changbin Zhang,Wenpo Shan
The development of high-efficiency non-noble-metal catalysts for HCHO removal is of great significance in indoor air purification. Zeolitic imidazolate frameworks (ZIFs) are characterized by large specific surface areas, well-defined porous structures, and tunable electronic properties, making them suitable for constructing single-atom catalysts with adjustable coordination environments. In this study, three Co-ZIF materials with distinct morphologies were synthesized and subsequently pyrolyzed, yielding cobalt-based catalysts with varied coordination structures. Among these catalysts, the Co–N–C(F) primarily features atomically dispersed Co species coordinated with four N atoms, forming Co-N4 active sites. Theoretical calculations indicate that the Co-N4 coordination structure exhibits enhanced oxygen activation compared to metallic cobalt sites, which is crucial for the degradation of intermediate products in the oxidation of HCHO. The Co–N–C (F) catalyst demonstrates superior activity in HCHO oxidation to even most noble metal catalysts. During a 710 h continuous test at 15 °C, the catalyst maintained 100% HCHO removal efficiency without observable deactivation. Simulation experiments further confirmed its practical applicability, with the catalyst module able to degrade 1 ppm of HCHO to <0.07 ppm within 2 h at room temperature. This work provides valuable insights for the development of commercial nonprecious metal catalysts for HCHO oxidation.
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Environmental Science-Nano
·
2026
·
IF 5.1
Shiyi Tu,Wenpeng Li,Yangyang Xu,Li Gan,Xiulan Weng,Zuliang Chen
The increasing release of antimony (Sb) into water environments due to anthropogenic activities poses significant ecological risks. This study developed a novel hybrid material, zeolitic imidazolate framework-8-iron nanoparticles (ZIF-8-Fe NPs), which demonstrates a synergistic adsorption-oxidation mechanism for efficient removal of Sb(III) from aqueous solutions. Major findings reveal that at an initial Sb(III) concentration of 1 mg L-1, ZIF-8-Fe NPs achieved a 73.3% removal efficiency within three hours through the dual processes of direct adsorption and oxidation of Sb(III) to Sb(V). Scanning electron microscopy-energy dispersive spectrometry (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) revealed that the removal mechanism involved both direct adsorption of Sb(III) by ZIF-8-Fe NPs and oxidation of Sb(III) to Sb(V), with two distinct morphologies of Sb adsorbed on the surface. The formation of covalent bonds (Zn-OH-Sb and Fe-O-Sb) was identified as the key factor in removing both Sb(III) and Sb(V) from aqueous solutions. The adsorption process conformed to the Langmuir adsorption isotherm and pseudo-second-order kinetics, with correlation coefficients (R²) of 0.959 and 0.999, respectively. The proposed mechanism suggests that the formation of Zn-OH-Sb and Fe-O-Sb covalent bonds plays a crucial role in Sb(III) removal. Significantly, ZIF-8-Fe NPs achieved removal efficiencies of 91.5% and 94.8% for Sb(III) at environmentally relevant concentrations of 100 µg L-1 and 20 µg L-1, in actual mining wastewater, demonstrating its practical applicability. This study establishes that ZIF-8-Fe NPs constitute an effective nanomaterial with significant potential for Sb(III) remediation in wastewater.
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CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Xiang-hua Qi,Zheng-hong Wang,Sheng-quan Chang,Kun-lun Gu,Peng Wang,Chun-hui Gong,Ao-tian Gu,Shu-xuan Li,Yi Yang
The crystallization behavior of 2,4,6-trinitrotoluene (TNT) confined within a hierarchical macro-microporous ZIF-8 (SOM-ZIF-8) framework and its impact on thermal decomposition are systematically investigated. TNT is incorporated into the porous host via evaporative crystallization, resulting in composites with varying TNT loadings. The well-defined macropores serve as templates for the confined growth of TNT nanospheres, while the intrinsic micropores are expected to facilitate the adsorption of key decomposition intermediates, potentially promoting autocatalytic decomposition pathways. XPS analysis reveals a negative shift of Zn 2p peaks and a positive shift of the –NO2 N 1s peak, indicating electron transfer from the nitro groups to the Zn2+ centers─an interfacial interaction further supported by the blue shift of –NO2 vibrations in FTIR. This confined crystallization dramatically alters the thermal decomposition behavior: the peak decomposition temperature decreases from 320 °C for pristine TNT to as low as 180 °C for the composite, and the apparent activation energy is reduced from 131.6 kJ·mol–1 to 75.1 kJ·mol–1. Combustion tests reveal significantly enhanced flame intensity and a maximum temperature increase from 889.5 to 1216.0 °C. The optimal loading (TNT: SOM-ZIF-8 = 5:1 by mass) achieves a balance between microporous catalysis and macroporous nanoconfinement, leading to the most efficient energy release. This work demonstrates that confined crystallization within hierarchically porous MOFs is an effective crystal-engineering strategy to tailor the thermal decomposition kinetics of conventional explosives, offering new insights into structure–property relationships in energetic materials.
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CATALYSIS LETTERS
·
2026
·Vol. 156
·期 7
·190
·
IF 2.5
Tan Zhe,Li Wenzhuo,Shangguan Hanlu,Wang Huixing,Wang Yufeng,Cheng Lei,Sun Lixian,Yan Puxuan
Aerogels are attractive for catalytic applications due to their ultra-low density and high surface area. Here, we prepare a novel composite aerogel integrating chitosan, cellulose, carbon nanofibers, and micron-sized Co 2 B@ZIF-67 catalyst via sol-gel and freeze-drying methods. The free-standing Co 2 B@e-ZIF-67 exhibits a hydrogen generation rate of 13,701.1 mL min⁻ 1 g⁻ 1 , attributed to the uniform immobilization of Co 2 B active species within the ZIF-67 framework, which prevents agglomeration and maximizes active site exposure. When embedded in the aerogel, the catalyst achieves a hydrogen generation rate of 9,811.7 mL min⁻ 1 g⁻ 1 , with an active site exposure efficiency of 71.7% and a low mass loss of 7.9% after reaction. The aerogel’s chemically crosslinked network ensures uniform catalyst dispersion and structural stability. Moreover, the use of natural polysaccharides (chitosan and cellulose) as the aerogel skeleton provides inherent biodegradability and recyclability, making this system a promising candidate for sustainable catalytic hydrogen production. Graphical The alternative text for this image may have been generated using AI.
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TALANTA
·
2026
·
IF 6.7
Huijun Li,Tianyi Zheng,Xiang Liu,Luojia Cheng,Junjun Sun,Zhouqing Xu,Yan Wang
A multifunctional composite, designated as ZIF-8@LY/ZIF-8@CDs-Eu 3+ , was rationally designed as a fluorescence probe and high-performance photocatalyst for simultaneous detection and degradation of oxytetracycline (OTC). To address the critical challenge of co-encapsulating fluorescein (LY) and Eu 3+ -functionalized carbon dots (CDs-Eu 3+ ) within a single porous particle without functional incompatibility, we proposed a core-shell ZIF-8 architecture, where the etched ZIF-8 core served as the host for LY loading, and the in situ grown ZIF-8 shell was introduced to immobilize CDs-Eu 3+ . The acetic acid etching of the ZIF-8 core created abundant sites to absorb more LY molecules, which further enhanced the OTC removal efficiency. On this basis, a fluorescence “turn-on” ratiometric quantitative detection platform for OTC was established, with a low limit of detection (LOD) of 1.8 nM. Meanwhile, the ZIF-8@LY/ZIF-8@CDs-Eu 3+ composite achieved 99% OTC removal within 300 min under light irradiation, driven by the generated reactive species including superoxide radicals (·O 2 − ), hydroxyl radicals (·OH), and photogenerated holes (h + ). Notably, three parallel degradation pathways of OTC were identified via high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS). This work not only provides an innovative strategy for the design of multifunctional MOF-based composites, but also opens a new avenue for the efficient monitoring and elimination of antibiotic residues in complex environmental matrices.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qi Liu,Ming-Dan Yao,Zi-Long Yang,Fu-Gui Yang,Zhe Feng,Ji Cai-Rang,Yu-Long Xie
ZIF-8-derived ZnO/CoFe 2 O 4 removes 99.12% ciprofloxacin in 6 min under visible light. • Type II band alignment drives directional electron transfer, suppressing carrier recombination. • Dual-channel PMS activation via photoelectron reduction and Co/Fe redox cycling. • Over 99% efficiency retained after five cycles in actual surface water and groundwater. Fluoroquinolone antibiotics in aquatic environments threaten ecosystems and human health by spreading antimicrobial resistance. This study synthesized a magnetically recoverable ZnO/CoFe 2 O 4 heterojunction using ZIF-8-derived porous ZnO as substrate via solvothermal method. The optimized composite achieved 99.12% ciprofloxacin removal within 6 min under visible light with peroxymonosulfate. XPS evidence supports Type II heterojunction formation with directional electron transfer with directional electron transfer from ZnO to CoFe 2 O 4 . A dual-channel PMS activation mechanism is proposed involving direct PMS reduction by photogenerated electrons and SO 4 ⁻ generation through Co 2 ⁺/Co 3 ⁺ and Fe 2 ⁺/Fe 3 ⁺ redox cycles. EPR identified 1 O 2 and SO 4 ⁻ as dominant reactive species. The catalyst maintained excellent stability with over 99% efficiency after five cycles. LC-MS revealed piperazine ring cleavage, decarboxylation and defluorination pathways leading to deep oxidative degradation. This work provides an efficient strategy for antibiotic wastewater treatment using magnetically separable photocatalysts with synergistic photo-oxidation and persulfate activation capabilities. Download: Download high-res image (205KB) Download: Download full-size image
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DESALINATION
·
2026
·
IF 9.9
Jiaxue Zhang,Yingbo Chen,Pengcheng Wang,Yanling Fang,Guangcun Liu,Liangliang Li
LbL-confined in situ ZIF-8 growth enabled high-performance NF membranes. • ZIF-8 nanochannels improved ion sieving and transport regulation. • The membrane achieved 98.5% Na 2 SO 4 rejection with improved permeance. • The membrane achieved 93.8% flux recovery and excellent operational stability. In this study, a high-performance nanofiltration membrane was developed by integrating layer-by-layer (LbL) polyelectrolyte assembly with confined in situ growth of zeolitic imidazolate framework-8 (ZIF-8). A PEI/PSS multilayer was constructed on a polyethersulfone (PES) support through sequential electrostatic deposition, providing a nanoscale confined environment for regulating ZIF-8 nucleation and growth. Zn 2+ ions and 2-methylimidazole were subsequently introduced into the multilayer structure, enabling the formation of ZIF-8 nanocrystals within the polyelectrolyte matrix rather than conventional particle incorporation. The optimized membrane achieved a Na 2 SO 4 rejection of 98.5 ± 0.3% with a permeance of 7.1 ± 0.1 L m −2 h −1 bar −1 , representing a 65% enhancement compared with the PEI/PSS counterpart. Meanwhile, MgCl 2 rejection increased from 64.6% to 93.0%, indicating improved divalent ion selectivity. These improvements were attributed to the confined ZIF-8 nanostructures, which optimized the selective layer architecture, reduced non-selective defects, and regulated ion transport behavior. Furthermore, the membrane maintained high salt rejection (>93%) under Na 2 SO 4 concentrations of 1–5 g L −1 and exhibited excellent antifouling performance with a flux recovery ratio of 93.8 ± 0.8%. This work provides an aqueous-phase strategy for constructing MOF-polyelectrolyte hybrid selective layers with enhanced ion selectivity, antifouling capability, and operational stability for advanced water separation applications. Download: Download high-res image (92KB) Download: Download full-size image
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