JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
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IF 6.7
Can Cui,Longhao Zeng,Xia Liu,Huihui Li,Bo Jiang,Da Guo,Huanjiang Wang,Yadian Xie
To address cadmium pollution in water bodies, a novel N-doped red mud-biochar magnetic composite (N-RCB) was prepared through one-step co-pyrolysis of corn stover and red mud at 800 °C, using ammonium chloride as a pore-forming agent and urea as a nitrogen source. The obtained N-RCB was applied for the efficient removal of Cd 2+ from aqueous solutions. The equilibrium adsorption capacity of N-RCB for Cd 2+ was 5.0 times and 4.2 times that of the pristine biochar (CB) and non-N-doped magnetic red mud-biochar (RCB), respectively. The maximum theoretical adsorption capacity of N-RCB for Cd 2+ could reach 473.25 mg·g –1 . Adsorption kinetics and isotherm studies indicated that the adsorption process of Cd 2+ onto N-RCB followed the pseudo-second-order kinetic model and the Freundlich isotherm model, suggesting that the process is dominated by chemisorption and heterogeneous multilayer adsorption. The thermodynamic parameters demonstrated that the adsorption process was spontaneous, endothermic, and driven by an increase in entropy. The adsorption mechanisms of Cd 2+ by N-RCB included pore filling, cation-π interactions, surface complexation, and electrostatic attraction. Coexisting ion experiments further demonstrated that N‑RCB exhibited good anti‑interference ability toward common ions such as K + , Na + , Mg 2+ , NO₃⁻, and Cl⁻. In addition, after five consecutive adsorption–desorption cycles, the removal efficiency of Cd 2+ by N-RCB remained above 88 %. These results indicate that N-RCB is a promising green and efficient material for the removal of Cd 2+ from water bodies, demonstrating significant application potential.
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Coatings
·
2026
·Vol. 16
·期 1
·89
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IF 2.8
Hao Liu,Haoyue Shi,Qianyu Ma,Liwen Yin,Yuxin Li,Wei Wang,Huijun Yu,Zuoli He
HighlightsWhat are the main findings?A simple and environmentally friendly preparation method for CoZn-ZIFs was proposed.The novel PMS activator Co-CNTs@NC was successfully obtained via pyrolysis of CoZn-ZIFs.What are the implications of the main findings?The Co-CNTs@NC/PMS system achieved efficient degradation of TCH over a wide pH range.The degradation mechanism dominated by1O2for TCH degradation was confirmed.Zeolite imidazolate frameworks (ZIFs)-derived carbon materials have garnered widespread attention as peroxymonosulfate (PMS) activators in removing antibiotics because of their excellent catalytic performance. However, most carbon materials derived from ZIFs exhibit limited efficacy in treating high-concentration (>10 ppm) antibiotic wastewater, and their synthesis methods are environmentally unfriendly. Herein, we develop a simple and environmentally friendly preparation method to synthesize a new type of nitrogen-doped carbon-supported carbon nanotubes coated with cobalt nanoparticle (Co-CNTs@NC) composites via high-temperature calcination of cobalt–zinc bimetallic ZIFs. The material characterization results confirm the successful preparation of Co-CNTs@NC composites featuring a high specific surface area (512.13 m2/g) and a Co content of 5.38 wt%. Across an initial pH range of 3.24–9.00, the Co-CNTs@NC/PMS catalytic system achieved over 84.17% degradation of 20 mg/L tetracycline hydrochloride within 90 min, demonstrating its favorable pH tolerance. The singlet oxygen-dominated degradation mechanism was confirmed by quenching experiments and electron paramagnetic resonance characterization. This work can provide technical guidance and reference significance for the preparation of metal–carbon materials derived from ZIFs with excellent efficiency of removal of high-concentration antibiotics.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Kexu Wang,Nianming Jiao,Bingtong Chen,Chunshan Li,Hui Wang,Yan Bai
Electric field enables challenging chemical reactions to proceed efficiently under mild conditions. Herein, this external field was proposed to intensify cracking of alkanes for the production of light olefins, a typical reaction requiring high temperatures. Composite conductive materials were prepared by physically mixing anatase-type titanium dioxide (A-TiO 2 ) and HZSM-5. It was demonstrated that electric-assisted treatment induced significant microstructural changes of the composite catalyst. XPS and EPR revealed that Ti 4+ was converted into Ti 3+ , accompanied by oxygen vacancy formation, the amount of which increased with the applied power. H/D exchange experiments confirmed that electric field could induce “proton hopping”, increasing the amount of medium-strong Brønsted acid sites. DFT calculations and in situ infrared spectroscopy indicated that the electric field promoted the adsorption of n -hexane on the catalyst, accelerated the charge transfer between them. These synergistic effects facilitated n -hexane conversion while promoting monomolecular cracking pathway, favoring light olefins production. The light olefins yield reached 38.6 wt% over the optimal composite catalyst with the external heating at 400 °C and electric power of 6.5 W, surpassing the thermal cracking yields (6.6 wt% at 400 °C; 14.2 wt% at 450 °C). This study provides valuable insights into the efficient cracking of light alkanes under mild conditions and the application of zeolite in electrocatalysis.
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Journal of Cleaner Production
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2026
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IF 10.7
Kaiwen Yun,Xixi Lian,Rui Shan,Guoqiang Wei,Shuxiao Wang,Haoran Yuan,Yong Chen
Catalytic pyrolysis of waste plastics to high-value olefins offers a sustainable route to address pressing global white pollution and realize plastic resource recycling, yet it faces a long-standing core dilemma limiting industrial application: low-cost calcium-based catalysts suffer from critical activity and stability defects under high-temperature conditions, while high-performance single-atom catalysts rely heavily on expensive noble or transition metals with poor industrial scalability. Notably, alkaline-earth metal single-atom catalysts remain largely underexplored for this high-temperature plastic pyrolysis application, with no mature catalytic system reported to date. Herein, we designed and fabricated a calcium single-atom catalyst with a well-defined carbon-nitrogen-calcium coordination structure through a facile synthetic strategy, to address these technical bottlenecks and enable efficient polypropylene pyrolysis for targeted olefin production. Calcium atoms are atomically dispersed and stably anchored on nitrogen-doped carbon supports via C-N bonds, fully overcoming the sintering-induced deactivation and active site loss of traditional calcium oxide-based catalysts. This catalyst exhibits an outstanding pyrolysis oil yield of 96.19 wt% with 73.82 wt% olefin selectivity; it also markedly reduces reaction activation energy, promotes selective β-scission of polymer chains, suppresses undesired byproduct formation, and retains atomic-level dispersion even after multiple cyclic reactions. This work provides a low-cost, high-efficiency catalyst for waste plastic upcycling, and lays a critical theoretical foundation for the rational design of alkaline-earth metal single-atom catalysts for high-temperature pyrolysis systems.
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Journal of Materials Chemistry C
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2026
·
IF 5.1
Haocheng Huang,Qiang Lou,Hao Zhang,Xinxin Xu,Zhengjie Xu,Xuan Lu,Hang Zhou
With excellent thermal and chemical stability, tin dioxide (SnO2) has emerged as a promising electron transport layers (ETLs) for the high-efficiency n–i–p perovskite solar cells (PSCs). However, for perovskite films deposited on SnO2, the surface hydroxyl groups of SnO2 and lattice mismatch lead to severe nonradiative charge recombination at the buried interface. Moreover, the inherent brittleness of perovskite renders the buried interface mechanically more vulnerable. In this work, a dipolar π-conjugated molecule, 3,5-diaminobenzotrifluoride (CF3-mDA), is employed as a buffer layer to modify the buried interface of PSCs with a relatively wide bandgap (1.60 eV). This buffer layer effectively coarsens the perovskite grains at the buried interface, increasing the grain size from 381.50 nm to 503.47 nm, and further enhances the mechanical toughness of the buried interface and mitigates the risk of interfacial fracture. Furthermore, it passivates the defects of both SnO2 and perovskite through its functional groups, as well as induces a more favorable energy band alignment. With this buried interface modification, the champion device delivers an average power conversion efficiency (PCE) increased from 18.74% to 21.93% (22.12% under reverse scan, RS, and 21.74% under forward scan, FS), with an average open-circuit voltage (VOC) boosted from 1.188 V to 1.232 V and a significantly suppressed hysteresis. The modified devices also show a higher environmental stability than the control counterparts, maintaining an average 85.20% of their initial PCE after 16 days of storage in ambient air (with 25% relative humidity, RH, and at room temperature, RT).
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INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.9
Shihan Kang,Letian Gao,Le-Le Zhang,Xue Zhang,Lei Wang,Nannan Lu,Lin-Wei Chen
N,F co-doped porous carbon materials were synthesized from waste tea leaves via a facile pyrolysis approach. • Highly dispersed Fe species and abundant Fe-N x active sites enhanced electrocatalytic activity toward caffeic acid. • The Fe/N,F-TC-0.25/GCE sensor exhibited a wide detection range (0.05–100 μM) and a low detection limit of 0.014 μM. • Synergistic effects of porous carbon structure and Fe-N x sites improved electron transfer and sensing performance. • The sensor reliably caffeic acid in tablet and blueberry samples, confirming practical applicability. Caffeic acid (CA), a phenolic compound widely present in natural foods, exhibits multiple pharmacological activities and plays an important role in regulating food quality. However, its dose-dependent biotoxicity and the demand for accurate determination in complex matrices pose significant challenges to analytical techniques. In this study, waste tea leaves were employed as a biomass-derived carbon source naturally containing elements such as N and F. Through Fe 3+ pre-complexation followed by pyrolysis, N,F co-doped porous carbon modified with highly dispersed Fe species was obtained. Under optimized conditions, the constructed Fe/N,F-TC-modified glassy carbon electrode (Fe/N,F-TC/GCE) electrochemical sensor exhibited excellent performance for CA detection. This superior performance can be mainly attributed to the porous structure of N,F-TC, which facilitates CA mass transfer and enhances reaction efficiency. Meanwhile, the high density of Fe-N active sites provides abundant catalytically active centers. Their synergistic catalytic effect significantly amplifies the redox signal of CA, thereby improving the electrocatalytic activity. The Fe/N,F-TC-0.25/GCE electrode showed a good linear response in the range of 0.4–7 μM and an overall working range over 0.05–100 μM. The statistically estimated limit of detection (LOD) was as low as 0.014 μM. Moreover, the sensor was successfully applied to the spiked detection of CA in tablet and blueberry samples, with recoveries close to 100%, demonstrating the excellent analytical performance of this method and its applicability to real-sample analysis. This study provides a simple, environmentally friendly, efficient, and sensitive detection strategy for CA related food quality control and pharmaceutical analysis, highlighting both theoretical significance and practical application potential. A Fe-containing N,F co-doped porous carbon (Fe/N,F-TC) was constructed from waste tea leaves through Fe 3+ pre-coordination followed by pyrolysis. The hierarchical porous framework, highly dispersed Fe species, and Fe-N x sites facilitate CA mass transport and electrocatalytic oxidation, markedly enhancing the electrochemical sensing performance toward caffeic acid. Download: Download high-res image (198KB) Download: Download full-size image
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POLYMER DEGRADATION AND STABILITY
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2026
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IF 8.1
Deyu Liu,Lirui Qiao,Jialei Kang,Ying Lu,Xuanle Lv,Yuhan Zhang,Feng Zhang,Yapeng Wang,Zheng Wang,Dan Meng
A fire safety FPUF was designed by using only 8 wt.% reactive flame retardant. • Resultant FPUF showed excellent smoke suppression, reducing TSP (−79.3%) and smoke density (−83.1%). • 42.7% and 50.7% reductions in pHRR and THR of FPUF-HTMP8 were achieved. • A smoke precursor regulation mechanism was experimentally verified. • The mechanical properties and fire safety for FPUF-HTMP8 were effectively maintained. Flexible polyurethane foam (FPUF) is highly flammable and releases lethal toxic smoke during combustion, primarily derived from isocyanate-containing structures. Furthermore, adding flame retardants inevitably leads to migration and failure issues. This study addressed the neglect of smoke-suppression mechanisms by synthesizing a phosphorus-nitrogen reactive flame retardant (HTMP). HTMP chemically incorporates into the polymer network via its multi-reactive sites, actively regulating thermal degradation pathways. Results demonstrated that 8 wt.% HTMP modified FPUF achieved a limiting oxygen index (LOI) of 24.1%, passed the HF-1 rating, and exhibited a 53.3% reduction in total heat release (THR). Notably, total smoke production (TSP) and smoke density decreased by 79.3% and 83.1%, respectively. It was demonstrated that HTMP regulated the reaction pathway of isocyanates produced by thermal decomposition of polyurethane through its hydroxyl groups and the amine structures generated by degradation, inducing cross-linking and cyclization reactions, and suppressing the production of smoke precursors from the source, inhibiting toxic volatiles (HCN). In addition, due to terminal hydroxyl groups, HTMP entered the FPUF network, endowing the material with excellent long-term service stability and improved mechanical properties. This research provides new insights for designing fire safety FPUF samples with low smoke release materials from a reaction pathway perspective.
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高影响因子
Polymers
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2026
·Vol. 18
·期 19
·2312
·
IF 5.8
Han Yang,Nicolas Gascoin,Liping Jiang,Xiaofeng Zhu,Xiang Huang,Khaled Chetehouna,Ruihua Guo
To overcome the flammability and formaldehyde-emission problems associated with plywood, a novel soy protein-based intumescent flame-retardant adhesive with phosphorus–nitrogen–silicon (P-N-Si) synergism (C@Si@APP) was developed in this study. C@Si@APP was initially prepared by coating silane-modified ammonium polyphosphate with collagen. Subsequently, C@Si@APP was combined with lignin and adenine and incorporated into a soy protein, collagen, and isocyanate (MDI)-based adhesive matrix to fabricate a flame-retardant adhesive for eucalyptus plywood. Cone calorimeter (CONE) analysis demonstrated that the flame-retardant plywood bonded with SPI/C/MDI/C@SiAPP18 achieved the most effective flame-retardant and smoke-suppression performance, and the peak heat release rate, total heat release, and total smoke production were reduced by 23.5%, 20.7%, and 43.9%, respectively, and the release rates of CO and CO2were also effectively suppressed. Mechanistic analysis indicated that the enhanced flame retardancy was mainly governed by a condensed-phase mechanism, in which phosphorylation and siloxane crosslinking promoted the formation of a compact and thermally stable char layer that protected the underlying material, whereas a gas-phase contribution involving the dilution of flammable volatiles by non-combustible gases (NH3, H2O, and CO2) and possible radical scavenging by phosphorus-containing species is proposed as a plausible complementary pathway inferred from the TGA-FTIR results and the previous literature.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Xiaojun Zhou,Wenwen Yang,Chunmei Zeng,Hejun Gao,Yunwen Liao,Kunpeng Song
·N-doped Fe 3 O 4 @CNTs with Fe-Nx and oxygen vacancies was fabricated for efficient ORR electrocatalysis. • The catalyst shows onset potential of 0.87 V and superior stability toward oxygen reduction reaction. • Zinc–air battery delivers 173.90 mW·cm −2 power density and stable running for 280 h. • Synergy of oxygen vacancies and Fe-Nx sites boosts ORR activity and structural stability. A composite catalyst consisting of Fe 3 O 4 nanoparticles coated with nitrogen-doped carbon nanotubes (Fe 3 O 4 @CNTs) was synthesized via in situ pyrolysis using heme-modified CNTs. Benefiting from the CNT coating and oxygen vacancies, the catalyst exhibits a half-wave potential of 0.88 V for oxygen reduction in alkaline media, with stability surpassing commercial Pt/C. In zinc-air batteries, it achieves a power density of 173.90 mW·cm −2 and maintains stable operation over 280 h. Experimental and theoretical studies reveal that the CNT coating provides a 3D conductive network, prevents Fe 3 O 4 agglomeration, and modulates the electronic structure of the active-sites via Fe–N interactions. Meanwhile, abundant oxygen vacancies are introduced into Fe 3 O 4 , optimizing O 2 adsorption and reducing reaction barriers. This work offers new insights into the design of iron-based oxide electrocatalysts with high activity and durability for renewable energy applications.
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EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
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2026
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IF 6.7
Guohua Ma,Yuan Gao,Kaiyue Zhang,Hongyu Zhao,Wenyan Gao,Yufang He,Yuwei Zhao,Minlun Nan
Icaritin was prepared from Epimedium leaves via a green enzymatic-acid route. • Five N-Boc-amino acid esters of icaritin (M1-M5) were synthesized in 75-90% yield. • M1 inhibited α-glucosidase ( IC 50 = 5.5 nM), outperforming acarbose and ICT. • M1 improved glucose uptake and reduced oxidative stress in IR-HepG2 cells. • Molecular docking and MD simulations suggest a structural basis for M1's potency. Type 2 diabetes increasingly calls for multi-target therapies that act along the intestinal-hepatic axis rather than at a single node, yet few chemical strategies have been designed to pursue both nodes from a single natural scaffold. Icaritin (ICT), the principal bioactive metabolite of the Epimedium flavonoid icariin, has long been used in traditional Chinese medicine to relieve metabolic wasting-thirst disturbances resembling diabetes and shows promising hypoglycemic activity. However, its free phenolic hydroxyl groups confer extensive hydrogen bonding with water, a structural feature expected to limit aqueous solubility and membrane permeability. Here, ICT was prepared from Epimedium leaves via a green enzyme-assisted hydrolysis route and converted, in synthetically useful yields (75-90%), into five N-Boc-amino acid ester derivatives (M1-M5) designed to mask its reactive phenolic hydroxyls while adding tunable lipophilic bulk. The N-Boc- l -proline ester M1 was the most potent α-glucosidase inhibitor ( IC 50 = 5.5 ± 0.5 nM), 1.5-fold and 2.0-fold more active than its parent ICT (8.3 ± 0.5 nM) and acarbose (11.0 ± 0.6 nM), and remained intact in simulated gastric and intestinal fluids. Docking and 100 ns molecular dynamics simulations provided preliminary structural insights into the possible interaction of M1 with α-glucosidase, with the rigid N-Boc-pyrrolidine group positioned in a hydrophobic cleft near the active site. In palmitate-induced insulin-resistant HepG2 cells, M1 (20 μM) increased glucose consumption by 58.1% over the model group, lowered intracellular ROS to approximately 2.6-fold of control, and reduced lipid accumulation to a level comparable to metformin. These effects were accompanied by downregulation of glucose-6-phosphatase and upregulation of catalase, without significantly altering basal glucose consumption in normal HepG2 cells. Together, these findings establish a scalable route to ICT and demonstrate that esterification of its phenolic hydroxyl groups can modify α-glucosidase inhibition and cellular metabolic phenotypes, identifying M1 as a lead compound meriting in vivo validation. Download: Download high-res image (387KB) Download: Download full-size image
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高影响因子
Advanced Science
·
2026
·
IF 14.1
Tinghong Xu,Yong Liu,Wenjing Zhang,Qiuruo Jiang,Yi Jin,Liangzheng Lin,Lumeng Wang,Zhanhao Gu,Mimi Lin,Shihao Chen
Iontophoresis-assisted corneal cross-linking (I-CXL) is an emerging transepithelial technique for treating keratoconus. I-CXL employs a small electric current to enhance the corneal penetration of riboflavin 5′-phosphate sodium (RF), avoiding the de-epithelialization side effects associated with conventional CXL (C-CXL). However, I-CXL is less effective than C-CXL due to insufficient RF surface charge hindering iontophoresis response and absorption efficiency, as well as inadequate reactive oxygen species (ROS) generation in the corneal stroma. This work reports the development of an innovative composite photosensitizer (NS-CQDs-RF), utilizing N, S co-doped carbon quantum dots (NS-CQDs) as nanocarriers, to overcome the bottlenecks facing I-CXL. Experimental results show that the as-synthesized NS-CQDs-RF composites exhibit a remarkable electric field response, enhanced RF corneal permeability, high ROS production efficiency, and excellent biocompatibility. Notably, I-CXL incorporating NS-CQDs-RF significantly improves corneal biomechanical stability, outperforming C-CXL while reducing total UVA irradiation energy without compromising efficacy. Density Functional Theory (DFT) calculations reveal that the optimized electronic structure and favorable energetics between NS-CQDs and RF drive efficient charge transfer, amplifying ROS generation. These findings highlight the superiority of the NS-CQDs-RF composite photosensitizers in I-CXL, offering a novel strategy for future keratoconus treatment.
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高影响因子
Frontiers in Microbiology
·
2026
·
IF 5.8
Lin Jiang,Xiaofang Yan,Fang Zhang,Ailing Chen,Yixuan Chen,Yongbiao Zheng,Lingjun Yu
Introduction N -acetylglucosamine (GlcNAc) serves as a signaling molecule that triggers a variety of physiological responses in microorganisms. However, its regulatory roles in metabolite biosynthesis and siderophore production in Lysobacter sp. 3655 remain unclear, especially regarding the quorum sensing (QS) signal 4-hydroxybenzoic acid (4-HBA) and the siderophore lysochelin under iron-deficient conditions. This study aimed to explore the regulatory effects of GlcNAc on metabolite profiles and lysochelin biosynthesis in Lysobacter sp. 3655. Methods Lysobacter sp. 3655 was cultured in oligotrophic medium with GlcNAc induction. The induced differential metabolite was isolated and structurally identified by nuclear magnetic resonance and liquid chromatography-mass spectrometry. Gene deletion mutants of GlcNAc catabolic genes ( nagA , nagE2 ), and L-phenylalanine biosynthesis gene (pheA) were constructed, as well as multiple deletion mutants in the lenB2 (4-HBA biosynthetic gene) mutant background. Growth status and lysochelin yield of these mutants were evaluated under iron-deficient conditions. Exogenous complementation assays were performed using 4-HBA, GlcNAc, p -hydroxybenzaldehyde, cinnamic acid, and p-hydroxycinnamic acid to verify their functional effects. Results GlcNAc specifically induced the production of a unique metabolite in Lysobacter sp. 3655, which was identified as p -hydroxybenzaldehyde. Deletion of nagA , nagE2 , or pheA completely abolished GlcNAc-induced p -hydroxybenzaldehyde biosynthesis. The lenB2 mutant showed significant growth defects and remarkably decreased lysochelin production under iron limitation, while exogenous 4-HBA or GlcNAc restored both phenotypes. Further disruption of nagA , nagE2 , or pheA in the lenB2 mutant eliminated the complementation effect of GlcNAc on lysochelin production. p -hydroxybenzaldehyde restored lysochelin biosynthesis by converting to 4-HBA, and the L-phenylalanine catabolic intermediates cinnamic acid and p-hydroxycinnamic acid also rescued the growth and lysochelin production defects of the lenB2 mutant. Discussion Our results reveal that GlcNAc regulates two metabolic pathways in Lysobacter sp. 3655: it promotes p -hydroxybenzaldehyde production through GlcNAc catabolism and L-phenylalanine metabolism, and restores lysochelin biosynthesis in the QS-deficient lenB2 mutant via either 4-HBA converted from p -hydroxybenzaldehyde or alternative pathways mediated by L-phenylalanine catabolites. These findings uncover a novel regulatory network controlling lysochelin biosynthesis in Lysobacter sp. 3655, providing important references for investigating the biocontrol mechanisms of Lysobacter species.
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高影响因子
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