SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Lei Zhou,Sai Ma,Meizhen Gao,Boyao Xie,Qi Shi
1,3-propanediol (1,3-PDO) is a high-value chemical that can be produced via glycerol hydrogenolysis or biological fermentation. The main products of glycerol hydrogenolysis include 1,3-PDO and 1,2-propanediol (1,2-PDO). The properties of propanediol isomers are extremely similar, which are difficult to effectively separate them. Based on the differences in the shape of ellipsoidal 1,3-PDO and spherical 1,2-PDO, ZIF-300 with a 6-member ring (6-MR) trap between cha and d6r cages that can match spherical 1,2-PDO have been selected for the separation of propanediol isomers. ZIF-300 series materials (named ZIF-300-S1, ZIF-300-S2 and ZIF-300-S3) with different 6-MR trap orientations have been constructed by variable the ratio between the small-sized 2-methylimidazole (mIm) and large-sized 5-bromobenzimidazole (bbIm) links. Theoretical and experimental results show that ZIF-300-S3 (Zn(mIm) 1.04 (bbIm) 0.96 ) preferentially adsorbed 1,2-PDO over 1,3-PDO because the 6-MR trap with uniform large bbIm/small mIm links distribution faces essentially the small d6r cage, which can better match spherical 1,2-PDO. In contrast, ZIF-300-S1 (Zn(mIm) 0.82 (bbIm) 1.18 ) show low uptake of 1,2-PDO and 1,3-PDO because the 6-MR trap with main large bbIm links distribution faces essentially the larger cha cage, which show weak confinement of 1,2-PDO and 1,3-PDO. The dynamic column adsorption (1,2-PDO/1,3-PDO: 50/50 g L −1 ) results exhibited that the adsorption capacity of ZIF-300-S3 for 1,2-PDO can be as high as 64.7 mg g −1 and selectivity for 1,2-PDO/1,3-PDO was 2.0. This work provides valuable insights into the construction of ZIFs materials with tunable 6-MR trap for effective separation of isomers.
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高影响因子
RARE METALS
·
2024
·Vol. 43
·期 6
·2623-2635
·
IF 9.6
Hong Fei-Fan,Shi Wei-Tao,Zhao Ruo-Lin,Fan Yi,Liu Zi-Qi,Ding Si-Zhi,Liu Hai-Zhen,Zhou Wen-Zheng,Guo Jin,Lan Zhi-Qiang
Herein, the successful preparation of a single-atom catalyst V–N–C using vanadium-doped zeolitic imidazolate framework (ZIF)-8 as a precursor is reported. The experimental results showed that the V–N–C had a good promoting effect on the hydrogen storage performance of MgH 2 , and the optimal addition amount of V–N–C was 10 wt%. The hydrogenation and dehydrogenation apparent activation energies of 10 wt% V–N–C-catalyzed MgH 2 were reduced by 44.9 and 53.5 kJ·mol −1 , respectively, compared to those of additive-free MgH 2 . The 10 wt% V–N–C-catalyzed MgH 2 could reabsorb 5.92 wt% of hydrogen in 50 min at 150 °C, with a capacity retention rate of 99.1% after 30 cycles of hydrogen absorption and desorption. Mechanism analysis showed that V–N–C was partially transformed into VN and metallic V when it was milled with MgH 2 ; the in-situ-formed VN and metallic V played an important role in improving the hydrogen storage performance of MgH 2 . This approach provides a potential solution for obtaining high-performance Mg-based hydrogen storage materials through synergistic interactions between V, N and C. Graphical abstract
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Desalination and Water Treatment
·
2024
·
IF 1
Gongduan Fan,Jing Luo,Israel de Jesus Lopez Prieto,Rujing Lin,Xiaomei Zheng,Liang Hong
The synthesis conditions of zeolitic imidazolate framework-8 (ZIF-8) have been optimized by a response surface method using central composite design (CCD) to obtain the high adsorption capability for the Pb(II) removal in aqueous solution. The physic-chemical properties of the as-prepared ZIF-8, such as morphology, structure and chemical composition, were characterized by field emission scanning electron microscopy (FE-SEM), powder X-ray diffraction (XRD) and energy-dispersive X-ray photoelectron spectroscopy (XPS), respectively. The adsorption capability, influence factors, isotherms, thermodynamics, kinetics and mechanism of Pb(II) in aqueous solutions were investigated. The optimal parameters of which have the highest adsorption capability for Pb(II) were 200 mL of water as the solvent, and the molar mass ratio of 2-methylimidazole and Zn(NO 3 ) 2 ·6H 2 O was 45.63. At this condition, the as-prepared ZIF-8 was a pure hexagonal three-dimensional crystal structure. The equilibrium adsorption capacity up to 668 mg/g for 300 mg/L of initial Pb(II) solutions and the adsorption was a spontaneous process. The largest adsorption capacity from Langmuir isotherm model was 686.25 mg/g. The adsorption kinetics followed the pseudo-second-order model. The equilibrium adsorption time and the optimal adsorption pH was 4 h and 6.0–7.0, respectively. The ZIF-8 still kept well adsorption effect after three times of usage. Therefore, this study showed that ZIF-8 is a promising sorbent for removing environmental pollutants.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Guo Chen,Guang-Zhen Wan,Juan Chen
The escalating global consumption of Traditional Chinese Medicine (TCM) necessitates robust quality control, particularly against contaminants like highly toxic hexavalent chromium (Cr(VI)), which must be distinguished from its essential trivalent counterpart (Cr(III)). In this study, a novel nanozyme-based colorimetric assay is presented for chromium detection, utilizing a zeolitic imidazolate framework-67 encapsulated iron-quercetin nanocomposite (Fe-QueNPs@ZIF-67). The core-shell nanostructure was synthesized through a facile one-pot method at room temperature, in which the ZIF-67 shell served as a sacrificial template to prevent agglomeration of the core Fe-QueNPs, thus preserving their intrinsic catalytic activity. In a buffer medium, the ZIF-67 framework disassembled, uniform dispersing Fe-QueNPs uniformly and releasing Co 2+ ions. A bimetallic complex was formed through synergistic coordination of Co 2+ with Fe 3+ and quercetin ligands, significantly enhancing the peroxidase-like activity of nanozyme. This improved catalytic activity promoted the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by H₂O₂. Importantly, a differential response to chromium species was observed: the catalytic reaction was inhibited by Cr(III), leading to signal reduction, whereas it was promoted by Cr(VI), resulting in signal amplification. This dual-response modulation enabled selective and sensitive quantification of Cr(III) (linear range: 10–1000 μM, LOD: 8.8 μM) and Cr(VI) (linear range: 0.5–70 μM, LOD: 0.36 μM). The method was successfully applied to TCM samples, achieving excellent recoveries (95–105%). This work provides a robust and sensitive platform for chromium speciation, offering a promising tool for quality control of herbal medicines and broader environmental monitoring.
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高影响因子
DESALINATION
·
2026
·
IF 9.8
Mengyao Chen,Yangxiang Huang,Yeqiang Lu,Congjie Gao,Lixin Xue
Polyamide/polyethylene (PA/PE) nanofiltration (NF) membranes based on polyethyleneimine (PEI) had demonstrated excellent Li + /Mg 2+ selectivity, but showing trade-off between their permeance and Li + /Mg 2+ selectivity. In this work, a novel cross-substrate counter diffusion (CSCD) method was introduced to grow and secure ZIF-L particles in the PA layers. Specifically, rather than directly contacting the PA layers containing Zn(II) cation (PA/Zn) with an aqueous solution of 2-methylimidazole (2-MIM) ligand from the top sides, 2-MIM ligand molecules were diffused across the PE substrate from the bottom sides to react with Zn(II) secured on the top sides of PA layers. Compared with the top-down method, the bottom-up approach had yield PA/ZIF-B NF membranes with higher surface roughness, larger average pore size and narrower pore size distribution. Notably, the pure water permeance of PA/ZIF-B membrane was increased by 2.6-folds to 15.1 L·m −2 ·h −1 ·bar −1 at a high Li + /Mg 2+ separation factor (S Li/Mg ) of 16.5, breaking the trade-off performance upper bound between water permeance and Li + /Mg 2+ separating selectivity and outperforming most of the reported TFN NF membranes.
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2026
·Vol. 26
·期 15
·5988-6000
·
IF 3.6
Zhang Ge,Deng Lihan,Li Jin
Formaldehyde, a common indoor air pollutant, poses a
serious threat
to human health. Therefore, there is an urgent need to develop highly
selective and sensitive formaldehyde gas sensors that operate at room
temperature. Doping with rare-earth elements is an effectively proven
strategy for optimizing the gas-sensing performance at room temperature.
This study developed a method to modify ZnO derived from ZIF-8 by
doping it with the rare-earth element cerium (Ce). The Ce-doped ZnO
(ZCO) series of sensors inherit the shell-and-core architecture derived
from the ZIF-8 precursor, featuring a high specific surface area that
provides support for gas-sensing reactions. Additionally, Ce doping
induces the formation of more oxygen vacancies, thereby enhancing
the formaldehyde adsorption. Among these, the ZCO-2 gas sensor exhibits
the best formaldehyde sensing properties at room temperature, with
a responsiveness of 1006 for 500 ppm formaldehyde (77.4 times that
of a pure ZnO gas sensor) and a response/recovery time of 9/3 s. Because
of the high response value, fast response/recovery time, excellent
selectivity, repeatability, and stability of this gas sensor, it has
a very promising prospect in practical applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yi-Fei Hui,Duan-Ping Hu,Yi Zhao,Shulin Li,Zhi-Feng Cai,Lin-Yi Li,Yuming Xie,Yong-Nian Zeng,Zu-Jin Lin,Fa-Qiang Tang
Sacrificial template strategy builds ZnO 2 @Hemin-ZIF-8 core-shell structure. • The seamless ZIF-8 shell prevents premature ZnO 2 leakage at physiological pH. • Hierarchical ZnO 2 @Hemin-ZIF-8@PB (ZHZHP) enables on-demand H 2 O 2 release. • ZHZHP enables dual-nanozyme cascade-based CDT and PTT to eradicate bacteria. • ZHZHP orchestrates anti-inflammation and angiogenesis to accelerate wound healing. Chemodynamic therapy (CDT) has emerged as a promising strategy for combating bacterial infections; however, the scarcity of endogenous H 2 O 2 within infection sites often bottlenecks therapeutic efficacy. Herein, a pH-responsive, H 2 O 2 self-supplying nanoplatform is meticulously engineered for spatiotemporally controlled chemodynamic–photothermal antibacterial therapy. This platform leverages ZnO 2 nanoparticles dual-role cores and sacrificial template to drive the in situ epitaxial growth of dense ZIF-8 shells (optionally encapsulated with Hemin), yielding the core–shell ZnO 2 @ZIF-8 (or ZnO 2 @Hemin-ZIF-8) intermediate. Stepwise surface engineering with hyaluronic acid (HA) and Prussian blue (PB) leads to the formation of a hierarchical core–shell structured ZnO 2 @Hemin-ZIF-8@HA@PB nanoplatform (ZHZHP). Under neutral physiological conditions, ZHZHP exhibits excellent stability as the interracially-bonded ZIF-8 shell effectively shields the ZnO 2 core from premature hydrolysis. Conversely, within the weakly acidic infection microenvironment, ZHZHP undergoes programmed disassembly, triggering the on-demand release of H 2 O 2 . Simultaneously, Hemin and PB act as peroxidase mimics to catalyze the conversion of liberated H 2 O 2 into highly toxic hydroxyl radicals (‧OH) via dual nanozyme cascades, while the PB component provides robust photothermal conversion under 808 nm NIR irradiation. This synergistic CDT/PTT approach achieves complete eradication of S. aureus and E. coli at an extremely low concentration of 50 μg mL −1 and demonstrates remarkable efficacy in disrupting both immature and mature biofilms. In vivo assays further confirm that ZHZHP significantly accelerates infected wound healing through potent antimicrobial and anti-inflammatory activities, alongside the promotion of angiogenesis. With high biocompatibility and negligible toxicity, ZHZHP represents a sophisticated strategy for the clinical management of refractory wound infections. Download: Download high-res image (156KB) Download: Download full-size image
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PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Xin Yu,Qinghe Gao,Guoxuan Li,Zhigang Lei,Chao Wang,Li Zhang,Huijuan Qian,Mingliang Zhu,Jin Huang,Conying Lu,Zhichao Zhang
Microbiologically influenced corrosion (MIC) induced by sulfate-reducing bacteria (SRB) severely threatens the service of metal materials, and traditional purely passive barrier coatings fail to withstand the continuous attack of biofilms. Herein, a ternary composite material (LDH-ZIF@CaO₂) composed of CoAl-LDH, ZIF-67, and CaO 2 was synthesized and incorporated into epoxy resin to construct an anti-corrosion coating that integrates active antibacterial and anti-corrosion properties. The study reveals that this composite possesses typical microenvironment responsiveness: in the acidic environment generated by microorganism metabolism, the Co ions released from the system can catalyze H₂O₂ (produced by CaO₂ hydrolysis) to undergo a Fenton-like reaction, generating highly oxidizing hydroxyl radicals (•OH) and singlet oxygen ( 1 O₂). This achieves highly efficient eradication of SRB and biofilm detachment. Electrochemical impedance spectroscopy (EIS) tests indicate that when the CaO₂ loading is 200 mg, the coating exhibits the optimal anti-corrosion performance, maintaining high compactness and high impedance characteristics even after 30 d of immersion, the impedance value is 10 8 Ω cm 2 , which is 2 orders of magnitude higher than that of epoxy resin systems. Furthermore, this paper thoroughly elucidates that the excessive addition of CaO₂ (400 mg) leads to filler agglomeration, internal gas pressure, and oxidative degradation of the resin matrix caused by excessive free radicals, which conversely accelerates coating failure. This study provides a new theoretical basis and strategy for designing microenvironment-responsive, anti-MIC coatings.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Weikun Sun,Jiahui Zou,Yufang Liao,Can Li,Jian Zhang,Mohammad Younas,Zumin Qiu
A Zn dosage-mediated thermal reconstruction strategy was proposed to fabricate LDH@ZIF derived catalyst. • Moderate Zn addition achieves uniformly dispersed ZnCo 2 O 4 spinel. • Optimized LZ-0.2 removes levofloxacin rapidly through multiple ROS pathways involving 1 O 2 . • The catalyst realizes stable 144 h continuous degradation in fixed-bed reactor. Peroxymonosulfate-based advanced oxidation processes (PMS-AOPs) are effective for refractory antibiotic removal, yet conventional layered double hydroxide (LDH) catalysts often suffer from lamellar collapse, active site aggregation and poor pore accessibility after calcination. Herein, a series of LDH(Co/Al)@ZIF-8 derived catalysts (LZ-x) were prepared through the growth of ZIF-8 on LDH(Co/Al), followed by pyrolysis, for PMS activation and levofloxacin (LFX) degradation. Regulating the Zn dosage controlled ZIF-8 growth and the subsequent thermal reconstruction of the hybrid precursor. Among them, LZ-0.2 exhibited an open hierarchical architecture and the highest catalytic activity, achieving 95.11% LFX removal within 5 min with a k obs of 0.576 min −1 . In addition, structural characterization indicated that an appropriate Zn dosage favored the formation and dispersion of ZnCo 2 O 4 -containing spinel domains within the porous nanosheet architecture. Meanwhile, mechanistic investigations supported a hybrid radical/non-radical oxidation pathway involving 1 O 2 , •OH, SO 4 •- and • O 2 − . Additionally, the LZ-0.2 + PMS system maintained effective performance in various real water matrices and stable fixed-bed operation for 144 h in hospital wastewater, with low Co and Zn leaching. Moreover, phytotoxicity, antibacterial activity, and zebrafish developmental toxicity were reduced after treatment. This work highlights Zn-dosage regulation as an effective strategy for directing the thermal reconstruction of LDH@MOF derived catalysts for efficient PMS activation and antibiotic abatement.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Rongfeng Guan,Ze Liu,Changlei Huang,Jiacheng Liu,Changjian Zhou
Developing a bifunctional photocatalytic system that combines efficient hydrogen evolution and hydrogen peroxide generation is of great significance for achieving solar-driven water splitting and green oxidant synthesis. In this study, a cobalt phosphide (CoP) cocatalyst with metalloid conductivity and porous structure was prepared by phosphorizing ZIF-67, and then composited with MnCdS solid solution via a one-pot hydrothermal method, successfully constructing a MnCdS@ZIF/P (MCS@Z/P) Schottky junction photocatalyst with intimate interfacial contact. The Mn doping strategy effectively regulated the band structure of CdS, not only narrowing the bandgap from 2.27 eV to 2.17 eV but also shifting the valence band maximum upward, thereby significantly enhancing visible light absorption and hole oxidation potential. After contacting with high-work-function CoP, a strong built-in electric field is formed at the interface, efficient driving directional transfer of photogenerated electrons from MnCdS to CoP. Under visible light irradiation, the optimized MCS@10Z/P catalyst exhibits excellent photocatalytic activity for both H 2 evolution (42.33 mmol·g −1 ·h −1 ) and H 2 O 2 production (1951.09 μmol·g −1 ·h −1 in air) in two independent reaction systems. Mechanistic studies reveal that the introduction of CoP not only serves as an efficient electron transport medium, but also shifts the oxygen reduction pathway from an inefficient single-electron process to a highly efficient two-electron dominant pathway by optimizing the *OOH intermediate adsorption free energy. The Gibbs free energy(ΔG H ) of the optimal sample is reduced to 0.13 eV, which significantly reduces the reaction energy barrier. This work provides new insights into the design of efficient bifunctional Schottky junction photocatalysts based on MOF-derived materials.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Nasim Ullah,Raza Ullah,Muhammad Adnan,Muhammad Rashid,Muhammad Fayaz,Bing Yu,Hailin Cong
g -C 3 N 4 activated ZIF-67 impregnated composite hydrogel beads adsorbent was synthesized. • Brilliant green was used as modal adsorbate. • Effect of initial dye concentration, contact time, pH, and temperature were examined. • Composite hydrogel beads adsorbent show maximum adsorption capacity of 226 mg/g. • The composite hydrogel beads adsorbent followed Pseudo-first-order kinetics and Freundlich isotherm. This research work presents new composite hydrogel beads adsorbent designed to adsorb brilliant green (BG) dye from water. The Graphitic carbon nitride (g-C 3 N 4 ) was modified with ZIF-67 and further integrated into sodium alginate to prepared composite hydrogel beads (CHB) adsorbent. The (CHB) adsorbent were comprehensively characterized using a suite of analytical techniques, such as FT-IR, TGA, SEM, EDX, XPS and BET analysis. To determine the optimal conditions for brilliant green dye removal, batch trials were carried out across a range of pH values (2−11), Dose (0.005–0.04 g), BG dye concentrations (25–300 mg/L), time (15–300 min), and temperatures (25–40 °C) studies respectively. The BET study showed that the surface area of (CHB) adsorbent was 0.500 m 2 /g. The (CHB) adsorbent demonstrated a maximum adsorption capacity of 226.27 mg/g. Kinetic analysis indicated that the (CHB) adsorbent followed second-order kinetics. The isotherm study indicated that the Freundlich model provided the best fit for the equilibrium data. The removal of BG using CHB adsorbent indicated that ΔGᴼ ranged from −2.22 to −2.37 KJ/mol. However, the ΔHᴼ received results was 3.91 KJ/mol. The determination indicating the adsorption process was endothermic and takes place spontaneously has been verified by the thermodynamic study. The results from the regeneration experiments indicated that the BG dye adsorption successfully completed up to five adsorption-desorption cycles while retaining an efficiency of 82.7% throughout the entire process. This (CHB) adsorbent providing an efficient and environmentally friendly for wastewater treatment.
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REACTIVE & FUNCTIONAL POLYMERS
·
2026
·
IF 5.4
Jie Xia,Liping Zhu,Yongqiang Ye,Yue Chen,Yangting Zeng,Kaiyuan Li,Fei Xiao
A facile and eco-friendly strategy was developed to synthesize IL@MOF hybrid FR. • The optimized composite achieved a UL-94 V-0 rating with a LOI value of 27.1%. • The peak heat release rate and total smoke production were reduced by −76.1% and −83.1%. • The reaction to fire and its underlying mechanisms were systematically characterized. The deployment of thermoplastic polyurethane (TPU) in high-safety applications is critically hindered by its inherent flammability and the emission of toxic smoke during combustion. To address these limitations, this study proposes a new strategy driven by structural engineering and spatial confinement. Specifically, a zeolitic imidazolate framework-8 (ZIF-8) precursor was selectively etched using an eco-friendly tannic acid to engineer a mesoporous host architecture (TZIF-8). By encapsulating a bespoke phosphorus-containing ionic liquid (PMDP) within these tailored cavities, a highly efficient inorganic-organic hybrid (PM@TZ) was synthesized. It was subsequently compounded with piperazine pyrophosphate (PAPP) to construct a synergistic fire-protection network within the TPU matrix. The optimized composite (incorporating 6.5 wt% PAPP and 1.5 wt% PM@TZ) demonstrated excellent flame retardancy, achieving a UL-94 V -0 rating alongside a limiting oxygen index (LOI) of 27.1%. Forced-flaming evaluations confirmed dramatic reductions in the peak heat release rate (−76.1%), total heat release (−62.1%), and total smoke production (−83.1%) relative to the TPU. Mechanistic investigations across the volatile and condensed phases elucidated a robust synergic reaction to fire. The liberation of active phosphorus radicals facilitates profound gas-phase flame quenching, whereas the confined ionic liquid and MOF-derived catalytic zinc nodes cooperatively accelerate the formation of a highly graphitized, heteroatom-doped (P/Zn) char barrier. In summary, this study provides a versatile structural engineering route for resolving the interfacial incompatibilities of ionic liquids, paving the way for next-generation, high-performance, fire-safe elastomers. Download: Download high-res image (170KB) Download: Download full-size image
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高影响因子
危险品化学品经营许可证（带存储）