Toxics
·
2026
·Vol. 14
·期 7
·627
·
IF 4.9
Zhitao Tang,Rongkui Su,Chuansheng Chen,Yiting Luo,Mingli Chen,Shunhong Huang,Xiancheng Ma
Antibiotic residues pose a serious threat to environmental safety. In this study, nitrogen/boron co-doped biochar (NBLB) was successfully prepared using lignosulfonate, an industrial byproduct, as the precursor via a one-step impregnation–pyrolysis method. NBLB was applied to activate peroxymonosulfate (PMS) to degrade tetracycline (TC) in water. The results showed that NBLB-activated PMS degraded 93.4% of TC within 60 min, which was 42.6%, 20.4%, and 27.8% higher than those of undoped biochar, nitrogen-doped biochar, and boron-doped biochar, respectively. Additionally, the NBLB/PMS system exhibited high tolerance to common aqueous anions such as Cl − , C O 3 2 − , PO 4 3 − , NO 3 − and S O 4 2 − . BET tests indicated that the specific surface areas of undoped, N-doped, B-doped, and NBLB were 133.98, 280.22, 304.13, and 342.35 m 2 g −1 , respectively, exhibiting a significant enhancement in the specific surface area of NBLB. The co-doping of N and B constructed a hierarchical pore structure, providing an efficient dispersion platform for active sites such as C=O, BC 2 O, and pyridinic-N. Quenching experiments and EPR detection demonstrated that the degradation of tetracycline (TC) in the NBLB/PMS system followed a synergistic oxidation mechanism dominated by 1 O 2 and O 2 • − , supplemented by • OH and S O 4 • − . This study prepared high-performance nonmetallic catalysts through a solid waste resource utilization strategy, providing a green and feasible path for the treatment of antibiotic pollution.
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Water
·
2026
·Vol. 18
·期 16
·1928
·
IF 3.5
Yixin Pan,Yajun Chen,Wenshuo Zhang,Xiaofan Lv
A nitrogen-doped carbon-confined cobalt–iron bimetallic catalyst (CFNC) was fabricated through high-temperature pyrolysis of a ZIF-67-modified CoFe2O4precursor and employed as a heterogeneous activator for peroxymonosulfate (PMS)-mediated Rhodamine B (RhB) degradation. The physicochemical properties of the as-prepared catalyst were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) analysis. These analyses demonstrated that Co–Fe bimetallic species were successfully embedded within the nitrogen-doped carbon framework, forming a confined carbon-supported catalytic structure. Under optimized conditions (CFNC dosage of 20 mg L−1, PMS concentration of 150 mg L−1, and initial pH of 7), the CFNC/PMS system achieved 99.45% RhB removal within 10 min. Moreover, the catalyst retained 78.91% degradation efficiency after five successive cycles, indicating its satisfactory reusability and structural stability. Mechanistic investigations based on radical scavenging experiments and electron paramagnetic resonance (EPR) analysis revealed that PMS activation over CFNC involved the coexistence of radical and non-radical oxidation pathways, in which singlet oxygen (1O2) played a predominant role. The defect-rich nitrogen-doped carbon matrix facilitated PMS adsorption and activation, promoting the selective formation of1O2, while the confined Co–Fe bimetallic sites contributed to efficient electron transfer during the catalytic process. The synergistic coupling between the Co–Fe active centers and conductive carbon framework accounted for the enhanced catalytic performance, suppressed metal leaching, and long-term stability of CFNC. This work presents a promising approach for constructing robust bimetallic carbon-based catalysts and advances the application of PMS-driven advanced oxidation processes for wastewater remediation.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Fan Chen,Lijuan Chen,Zifu Yan,Yizhe Liu,Li Niu
Antibiotic residues, especially ciprofloxacin (CIP), pose ecological and health risks due to their persistence and poor removal by conventional wastewater treatment. Herein, a magnetically recyclable Ti 3 C 2 –Co nanoreactor was synthesized via a molten-salt in situ etching strategy for efficient peroxymonosulfate (PMS) activation and CIP degradation. The confined Ti 3 C 2 –Co architecture promotes local enrichment of PMS and CIP near Co active sites, thereby enhancing interfacial oxidation and reactive oxygen species (ROS) utilization. Density functional theory (DFT) calculations revealed that Ti 3 C 2 –Co strengthened PMS adsorption with an adsorption energy of −1.17 eV and elongated the O–O bond to 1.633 Å, confirming facilitated PMS activation and charge transfer. The Ti 3 C 2 –Co/PMS system achieved 99% CIP degradation within 30 min, maintained high activity over a broad initial pH range of 3–11, and removed more than 85% of CIP in real water matrices. Radical and non-radical pathways involving SO 4 − ·, ·OH, O 2 – ·, and 1 O 2 jointly contributed to CIP degradation, while Co 2+ /Co 3+ cycling and Ti 3 C 2 –Co interfacial electron transfer synergistically promoted PMS activation. The catalyst retained 90.85% activity after four cycles, demonstrating its potential for practical wastewater treatment.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Hongxing Zhan,Hailu Wang,Yuanbing Li,Shujing Li,Zhen Cai,Zhe Qiao
This study focuses on the corrosion behavior of Al 2 O 3 –SiO 2 refractory materials under high-temperature CO atmospheres in hydrogen metallurgy, systematically revealing the occurrence form of Fe element in mullite–corundum ceramics with different Fe 2 O 3 contents. By simulating hydrogen metallurgy conditions and integrating thermodynamic analysis, phase evolution, and microstructural characterization, a dual intragranular and grain boundary corrosion mechanism was identified: (1) Fe 3+ in the [Al/FeO 6 ] octahedron of the mullite crystals were reduced to Fe 2+ and leached out of the lattice, resulting in charge imbalance and lattice distortion within the structure, thus reducing the stability of the mullite crystal. (2) Migrated Fe and impurities element at grain boundaries promote glass phase precipitation, while leached Fe 2+ reduces glass viscosity by disrupting Si–O networks, forming low-viscosity liquids that accelerate mullite dissolution. Results demonstrate a critical Fe 2 O 3 doping threshold (10 wt%), beyond which mullite undergoes reductive dissociation accompanied by hercynite and low-melting phase formation (ferrocordierite, fayalite). Hercynite and glass phase contents exhibit near-linear increases with Fe content. This work clarifies the valence of the Fe element and its gradient-driven microstructural failure mechanisms under hydrogen metallurgy conditions, providing theoretical foundations for optimizing reduction-resistant mullite-based linings.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Yifei Wang,Yingdong Yang,Yuxing Liu,Xinkang Zhang,Fengming Mo,Tao Huang,Yongjiang Shan,Ting Wu,Fei Zhang,Xiangshu Chen,Hidetoshi Kita
Capturing and recovering CO2 from steel industry gases is essential for environmental preservation since it lowers greenhouse gas emissions and raises CO concentrations. Because of its high selectivity, energy efficiency, and continuous operation, membrane separation technology has a lot of potential for CO2 separation. In the present work, a hydroxyl free radical (•OH), generated by the addition of a small amount of sodium persulfate to the precursor solution, was introduced for the first time to induce the synthesis of the ZSM-58 crystals and membranes. Hydroxyl free radicals can promote the depolymerization and condensation of silica sources during the synthesis process, thereby accelerating nucleation and crystallization. Compared with the precursor solution without sodium persulfate, the synthesis time of the membrane can be reduced by 30%, the resulting zeolite membrane exhibits a CO2/CO separation factor of 16 and a high CO2 permeance of 1.5 × 10–7 mol m–2 s–1 Pa–1. In addition, CO2/N2 and CO2/CH4 separation performances were also tested to evaluate the membrane quality. The separation factor of the equimolar CO2/N2 and equimolar CO2/CH4 mixtures reached 28.6 and 248.3 at 298 K at 0.1 MPa, accompanying the corresponding CO2 permeance of 1.3 × 10–7 mol m–2 s–1 Pa–1 and 1.5 × 10–7 mol m–2 s–1 Pa–1, respectively. This research presents an innovative and effective method for fabricating zeolite membranes.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Li Quanyang,Yu Liang,Shen Lv,Fu Jiankun,Zhou Ru,Hao Min,Jiang Juncheng
Polypropylene (PP) is a widely used thermoplastic resin known for its strong properties, including chemical stability, electrical insulation, and high abrasion resistance. However, its low ignition point and rapid burning rate pose significant fire risks, necessitating the incorporation of flame retardants. In this study, cobalt metal–organic framework (Co-MOF), melamine polyphosphate (MPP), and expandable graphite (EG) were combined to enhance the flame retardancy of PP. The optimal blending ratio was determined, and the results showed that PP/MPP/2 mass% Co-MOF/15 mass% EG composites exhibited superior flame retardancy. These composites achieved a critical oxygen index (LOI) of 28%, a V-0 rating in the UL-94 test, and significantly reduced heat release and smoke production during combustion. The synergistic effect of MPP, Co-MOF, and EG facilitated the formation of a dense, thermally stable carbon layer, which effectively hindered flame propagation and improved fire safety. These findings provide valuable insights for the development of flame-retardant PP materials. Graphical abstract
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Colloid and Interface Science Communications
·
2025
·
IF 4.7
Zhanglong Huang,Shiwei Ding,Lili Zhong,Chenxi Liu,Xiaofei Li,Dan He
Combination therapy holds great promise for enhancing antitumor efficacy by achieving tumor-targeted and sequentially synergistic cytotoxicity. We developed a tumor-targeted hybrid micellar nanoplatform that co-delivers the chemotherapeutic agent pemetrexed (PEM) and carbon monoxide (CO) for synergistic chemo-gas therapy. PEM and Fe₃(CO)₁₂ were covalently conjugated to D-α-tocopheryl polyethylene glycol succinate (TPGS), yielding two amphiphilic prodrugs—TPGS-PEM and TPGS-CO—which were co-assembled into hybrid micelles. The presence of PEM enabled folate receptor-mediated active targeting, resulting in efficient uptake by 4T1 breast cancer cells. Intracellular esterase-catalyzed cleavage of the ester bond released PEM, which elevated reactive oxygen species (ROS) levels. The increase in ROS triggered site-specific CO release from the Fe–CO complex. This sequential mechanism enabled a cascade of tumor-selective chemotherapy and gas therapy, leading to enhanced apoptosis and reduced tumor proliferation. The hybrid micelles exhibited superior tumor suppression, reduced systemic toxicity, and prolonged survival in tumor-bearing mice.
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POLYHEDRON
·
2025
·
IF 2.6
Xingru Liu,Huizhong Wu,Yingdi Zhang,Xicheng Deng,Haoyue Xu,WangYe,Yingxi Wang,Ling Li
A series of bimetallic Co/Ce-MOFs materials (Co/Ce-MOFs-NH 2 ) were synthesized via a solvothermal method, and their catalytic performance in peroxymonosulfate (PMS) activation for the degradation of Rhodamine B (RhB) was systematically investigated. The results demonstrate that the 3:1 Co/Ce-MOFs-NH 2 not only retains high catalytic activity but also exhibits significantly enhanced structural stability due to the introduction of Ce 3+ . Over 99 % of RhB was degraded within 3 min, and the material maintained 92.3 % of its initial activity after five consecutive cycles. Mechanistic studies revealed that · OH and singlet oxygen ( 1 O 2 ) serves as the dominant reactive oxygen species, while the synergistic redox cycles of Co 2+ /Co 3+ and Ce 3+ /Ce 4+ effectively promote the continuous activation of PMS. This study provides a novel strategy for designing highly efficient and stable bimetallic Metal-Organic Frameworks(MOFs) catalysts.
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WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 15
·1-15
·
IF 3
Lv Tingting,Wang Hong,Li Ding,Li Ruihai,Yang Chengliang,Zhao Wei,Cui Zhenyu,Li Jianxin
Organophosphorus pesticide contaminated sites have been categorized as a global priority contaminated site type for remediation due to the excessive accumulation of persistent organic pollutants. This study investigated the removal effect of phorate (PHR) in polluted soil through co-solvent-assisted alkaline activation of persulfate (PS) system, and evaluated the contribution of the co-solvent to the desorption behavior and solubilizing effect of PHR. Results showed that a high PHR degradation rate of 56.1% was obtained on the second day under the following conditions: 40% (v/v) acetonitrile (ACN) as co-solvent, C PS = 382 mmol L –1 , pH 12, and a W L /W s ratio of 1:2. It was a significant improvement over the system without co-solvent (19.9%). Moreover, a degradation rate of PHR was up to 93.9% on the 21st day under the optimized operating conditions, which was significantly higher than that observed in the persulfate oxidation system (13.1%) and the alkaline hydrolysis system (33.6%). The critical active species, including sulfate radicals \(S{O}_{4}^{\bullet -}\) and hydroxyl radicals (•OH) for the oxidation of PHR in contaminated soil during the alkaline-activated persulfate system were identified using electron spin resonance (ESR) and radical quenching experiments. The degradation pathways involved both hydrolytic pre-activation and radical mineralization. Furthermore, the luminescent bacteria tests demonstrated that the luminescence inhibition rate of the PHR-contaminated soil decreased from an initial value of 100% (highly toxic) to 16.2% (low toxicity) after remediation. In summary, this study offers a promising approach for the remediation of organophosphorus pesticide-contaminated soils.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hui Su,Furong Ye,Siyi Zhang,Changcun Han,Jipeng Dong,Zhixin Dai,Xinguo Ma,Lei Ge
The sluggish anodic oxygen evolution reaction (OER) kinetics remains a critical bottleneck for sustainable hydrogen production via water electrolysis. Guided by Density Functional Theory (DFT) calculations, we engineered Fe-CoS 2 /Ni 3 S 4 dual-site catalysts where Co 3+ and Fe 3+ centers synergistically optimize p-d orbital hybridization to enhance OER kinetics. Operando analyses reveal Co 3+ as primary active sites facilitating rate-limiting OOH* → O 2 desorption with Gibbs free energy (ΔG) reduced by 0.94 eV, while Fe-induced electron delocalization lowers intermediate coupling barriers. Notably, the catalyst facilitates dynamic reconstruction, generating metastable Co 3+ species with optimized eg orbital occupancy (t 2 g 5 eg 1 configuration) and strengthened p-d hybridization via Fe-mediated charge transfer. This electronic synergy enables ultralow overpotentials of 156 mV (hydrogen evolution reaction HER) and 230 mV (OER) at 50 mA cm −2 , with a cell voltage of 1.48 V for overall water splitting at 10 mA cm −2 . The dual-site architecture simultaneously suppresses metal dissolution (<12 % after 20 h) while maintaining 89.2 % initial activity. This work establishes a dual-regulation strategy: atomic-level orbital engineering for OER intermediate optimization and dynamic surface reconstruction for HER-active phase stabilization, offering a paradigm for designing robust bifunctional electrocatalysts.
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ULTRASONICS SONOCHEMISTRY
·
2025
·
IF 9.7
Rijia Liu,Bolin Wu,Changru Xu,Chaojun Zhang,Meng Han,Meiting Zhao,Wein-Duo Yang,Rui Liu
This work developed an ultrasonically assisted synthesis of nickel cobaltite (NiCo 2 O 4 ) modified electrode for simultaneous detection of Furazolidone (FRZ) and Metronidazole (MTR) in biological samples. The structural and chemical properties of the as-prepared electrodes were systematically characterized through multiple analytical techniques. The NiCo 2 O 4 -modified glassy carbon electrode (NiCo 2 O 4 /GCE) demonstrated exceptional performance with wide linear ranges of 0.005–200 μM for MTR and 0.01–150 μM for FRZ, with remarkably low detection limits of 2.57 nM and 29.13 nM, respectively. The sensor exhibited excellent selectivity against common interferents, good reproducibility, and maintained > 90 % activity after 30 days. NiCo 2 O 4 /GCE can be used to detect MTR and FRZ in real pharmaceutical and serum samples, achieving excellent recovery rates within the range of 94.0 % to 114.0 %. This work not only presents a superior sensing platform for antibiotic monitoring but also establishes ultrasound-assisted synthesis as an effective strategy for developing advanced bimetallic oxide electrocatalysts.
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CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Fei Xiao,Wei Peng,Kaiyuan Li,Bihe Yuan,Gaëlle Fontaine,Serge Bourbigot
Natural wood is a pervasive sustainable structural material with efficiency, aesthetically pleasing, usefulness, and durability, which is widely used in building construction. However, the fire safety of wood is unsatisfactory for many advanced engineering structures and applications. To address this issue, a highly fire-safe wood hybrid was developed, inspired by transparent wood, through partial delignification and co-impregnation with multi-component flame retardants. The results showed that partial removal of lignin from wood (∼5 wt%) significantly increased the loading of flame retardants from 70 wt% to 133 wt%. Furthermore, it provided exceptional self-extinguishing and fire retardancy to the wood hybrid. The vertical burning test revealed that the wood hybrid did not self-propagate when directly exposed to an open flame and rapidly self-extinguished when removed from the igniting flame. Notably, it did not ignite at an external heat flux of 50 kW/m 2 (cone calorimetry experiment), and the recorded peak heat release rate was reduced by more than 85 % compared to the original wood. It is demonstrated that the co-impregnation of guanidine phosphate and boric acid modifies the thermal decomposition pathway of wood hybrid during burning, allowing the wood to form homogeneous and dense char residues. These carbonaceous structures were embedded with phosphate and borophosphate species, which provide the char residues with improved resistance to oxidation and higher thermal stability, preventing heat and oxygen from infiltrating the underlying wood. In summary, this work provides a facile delignification and co-impregnation strategy that greatly improves the fire retardancy of wood and represents a promising approach toward highly fire-safe structural materials.
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