CATALYSIS LETTERS
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2026
·Vol. 156
·期 3
·80
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IF 2.5
Li Xincheng,Huang Pengpeng,Fan Mingming,Zhang Pingbo
Isostearic acid, a bio-based and environmentally friendly chemical, has attracted considerable attention because of its high value as an oleic acid derivative. The synthesis of isostearic acid via oleic acid isomerization over commercial H-ZSM-5 zeolites is limited by low yield and acid value, mainly due to diffusion constraints. To address this issue, a hierarchical-pore H-ZSM-5 zeolite (Meso-5) was synthesized using Silicalite-1(S-1) as a seed crystal to enhance diffusion and catalytic performance. The catalyst was comprehensively characterized by XRD, SEM, BET, TGA, FT-IR, and Py-FTIR. Meso-5 efficiently catalyzed the isomerization of oleic acid, attributed to its abundant Brønsted and Lewis acid sites whose synergistic interaction significantly promoted the formation of branched-chain products. The catalyst delivered a selectivity of 87.3% with a 71.1% yield in the first run, and even after five reuse cycles it maintained 82.1% selectivity with a 55.6% yield. Evidently, the hierarchical pore structure of the catalyst significantly facilitated the diffusion of oleic acid molecules and their isomerized intermediates, thereby enhancing the overall catalytic activity. The resulting isostearic acid was purified via a simple recrystallization procedure to a purity of 83.4% and an acid value of 186.7 mg KOH/g, both meeting the standards of commercial isostearic acid. These findings provide a robust basis for further catalyst optimization and scale-up toward industrial isostearic acid production. Graphical A tandem catalytic route combining ZSM-5-driven isomerization with Ni/C-catalyzed hydrogenation enabled the efficient conversion of oleic acid to isostearic acid. The hierarchical H-ZSM-5 structure enhanced branched-chain formation, ensuring high selectivity and yield toward the desired product
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JOURNAL OF CATALYSIS
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2026
·
IF 6
Jie Wang,Feng Gao,Jilei Lin,Chunjuan Zhang,Meiqing Shen,Linghui Kong,Gurong Shen
Ammonia is emerging as a promising carbon-free energy carrier. The electrocatalytic ammonia oxidation reaction (AOR), highly structure-sensitive, exhibits exceptional activity on Pt nanocubes (NCs) with (100) facets. Yet, synthesis methods employing metal carbonyl capping agents inevitably introduce residual metals, whose catalytic effects are often neglected. Here, Pt NCs synthesized with Mo(CO) 6 were found to contain trace Mo both in the bulk and at the surface. Surface Mo species, partially oxidized to MoO x , substantially modify the electronic structure of Pt(100), lowering activation barriers for rate-determining AOR steps and enhancing resistance to nitrogen poisoning. These effects collectively boost AOR performance, enabling a direct ammonia fuel cell with a Pt-154 anode to achieve a peak power density of 26.7 mW cm −2 . These results reveal the overlooked impact of capping-agent-derived contaminants in AOR and point to the deliberate incorporation of heterometallic modifiers as a viable strategy for advanced electrocatalyst design.
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Hongyu Ning,Yilei Fan,Haodong Wang,Huijun Liu,Zhongping Huang,Haixing Wang,Xing Ke,Yu Xu
Background The global increase in cannabis use has created a strong demand for reliable and efficient detection methods. Traditional urine-based assays are widely used and standardized, but suffer from complex hydrolysis requirements, long detection windows, and an inability to monitor recent use. In contrast, oral fluid testing enables non-invasive, real-time detection of parent cannabinoids, but is limited by low sample volume, matrix interference, and insufficient sensitivity in common rapid tests. It is clear that a sample preparation and detection approach is needed that is robust, highly sensitive, streamlined, and compatible with high-throughput confirmatory analysis such as LC-MS/MS. Results In this study, a magnetic solid-phase extraction (MSPE) method was developed using a novel magnetic metal–organic framework composite, Fe 3 O 4 @poly(GMA/DVB-ZIF-8), for the efficient extraction of four cannabinoids from urine and oral fluid. The sorbent uses multiple interactions—including hydrophobic, π–π, electrostatic, and Zn–O coordination—to achieve high analyte recovery (exceeding 85%). Coupled with UHPLC-MS/MS analysis, the method demonstrates wide linearity (0.05–25 ng/mL, r 2 > 0.9945), low detection limits (as low as 0.017 ng/mL), and good repeatability (RSDs <13.8%). Comparative evaluation with conventional liquid–liquid extraction showed minimal deviation (relative percent difference <6.0%), confirming high trueness and reliability for cannabinoid monitoring in biological samples. Significance This MSPE approach provides a simple, efficient and high-throughput sample preparation method for reliable and rapid forensic analysis of cannabinoids in complex biological samples.
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Results in Chemistry
·
2026
·
IF 5.8
Sisi Chen,Pujian Zhuang,Ruichao Chen,Yiping Shen,Lupeng Zeng,Xi Zhang,Xu Yao,Fang Wu,Jinghua Chen,Dongzhi Wu,Jianming Lan,Wenhui He
A straightforward and highly selective upconversion luminescence (UCL) nanosensor was designed for the detection of cyanazine (CZ) pesticide residues in food and environmental samples, based on the luminescence resonance energy transfer (LRET) mechanism. Without any modification, the LRET system employed upconversion nanoparticles (UCNPs) and gold nanoparticles (AuNPs) as the energy donor and acceptor respectively to achieve efficient quenching of UCL. CZ specifically induced the aggregation and detachment of AuNPs from UCNPs, leading to the termination of LRET and achieving the “off-on” process of UCL. According to the changes in UCL, the linear range of the nanosensor for CZ detection was 0.1–8.0 μM, with a detection limit of 0.098 μM. Finally, the nanosensor was successfully applied to detect CZ spiked in lake water, tap water, and corn. The recovery rates were in the range of 98.99–101.42%, and the relative standard deviations (RSD) were below 3%. The proposed nanosensor exhibits excellent application prospects in complex sample matrices.
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AICHE JOURNAL
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2026
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IF 4.4
Xuexue Dong,Benhuan Xu,Jian Tian,Bo Jiang,Yu Deng,Bin Chen,Yixin Li,Gen Li,Guowu Zhan
Selective deoxygenation of fatty acids to diesel-range alkanes without carbon-chain shortening is essential for sustainable biomass upgrading, but high selectivity remains challenging by competing decarbonylation/decarboxylation pathways. Here, a Re/In 2 O 3 featuring Re single atoms and ReO 3 clusters was synthesized for the hydrodeoxygenation of stearic acid. In contrast to In 2 O 3 , which primarily yields 1-octadecanol (93.1% selectivity) with minimal n-octadecane (1.2% selectivity), the optimized Re/In 2 O 3 catalyst achieves 100% selectivity diesel-range alkanes (>85% n-octadecane). Isotopic labeling, in situ spectroscopy, and kinetic analyses reveal Re-induced synergy: ReO 3 enhance H 2 dissociation, while Re single atoms promote bidentate adsorption of fatty acids, and oxygen vacancies in In 2 O 3 facilitate selective C–O bond cleavage. This multifunctional synergy suppresses C–C bond scission and significantly lowers the apparent activation energy for hydrodeoxygenation by 36.5 kJ·mol −1 . The catalyst exhibits broad applicability across diverse carboxylic acids, including unsaturated and aromatic substrates, underscoring its potential for efficient biomass utilization.
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Journal of Physical Chemistry Letters
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2026
·
IF 4.5
Yaoming Zhu,Chengjun Liu,Yuwei Li,Junyu Li,Wei Lei,Xiaobao Xu,Jing Chen
Scintillators for X-ray imaging have gained significant interest due to their essential roles in medical diagnostics, security screening, and industrial inspection. However, conventional scintillators often suffer from limitations, such as a low light output efficiency or poor stability. Herein, we report a novel bilayer scintillator based on copper halide nanocrystals, comprising Cs3Cu2Cl5/Cs3Cu2I5 nanocrystals, which exhibits better performance in X-ray imaging. By optimization of the copper halide nanocrystal passivated with ammonium halides, the photoluminescence quantum yield can be increased from 41.85 to 66.18%, facilitating the performance of these bilayer copper-based halide scintillators. It utilizes energy-dependent attenuation contrast generated through differential X-ray absorption in the bilayer copper-based halide scintillators to generate dual-energy X-ray imaging. Moreover, the all-inorganic composition ensures the exceptional stability of the scintillator under prolonged X-ray irradiation. This study presents an innovative approach for developing next-generation, high-performance, and cost-effective X-ray imaging scintillators.
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JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2026
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IF 2.2
Guohua Song,Guolin Jing,Zhengnan Sun,Huili Zhang,Hailin Yu
Oil-contaminated wastewater containing emulsified oil can severely pollute water bodies. Due to the action of surfactants, emulsified oil forms a stable emulsion system, making it difficult to remove through static separation methods. However, high-efficiency coagulants can purify the oil-contaminated wastewater, bringing it up to discharge standards.In this experiment, polymeric ferric sulfate(PFS) was prepared via direct oxidation method, usingFe(NO3)3·9H2O, NaHPO4, and NaHCO3 as the reaction precursors. Subsequently, the polymeric ferric sulfate was combined with oleic acid-modified(OA) carbon quantum dots(CDs) to synthesize the composite coagulant PFS + CDs + OA. The characteristic functional groups of the coagulant were analyzed using FTIR, and the crystal structure and morphology of carbon quantum dots were studied by XRD and TEM. The experimental results indicate that at a dosage of 300 mg/L, PFS + CDs achieve a turbidity removal rate of 86.3 ± 0.02% and an oil removal rate of 97.2 ± 0.01%. The composite coagulant PFS + CDs + OA, at the same dosage, demonstrates a turbidity removal rate of 92.8 ± 0.02% and an oil removal rate of 99.7 ± 0.01%, showing more significant effectiveness in treating oily mineralized water. Subsequently, a performance analysis of PFS + CDs + OA was conducted, revealing its mechanism in treating oily wastewater. The hydrophobic association effect of oleic acid-modified carbon quantum dots enhances the electrostatic neutralization, bridging adsorption, and net entrapment interactions between polymeric ferric sulfate coagulant and oily mineralized water, forming large and compact flocs. In summary, the preparation method of PFS + CDs + OA is efficient and straightforward, exhibiting excellent oil and turbidity removal performance for oily mineralized water, and holds promising prospects for practical applications.
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Chemistry-Switzerland
·
2026
·Vol. 8
·期 3
·30
·
IF 2.6
Keyujia Zhong,Fang Lei,Shiqing Dang,Hongyang Zhang,Ying Shi,Haohong Chen
Perovskite quantum dots (PQDs) face significant performance limitations due to surface defects, which are not sufficiently addressed by conventional single-passivation methods. We introduce a dual-passivation strategy that synergistically combines bifunctional ligand 3-(N,N-dimethyloctadecylammonium)-propanesulfonate (SB3-18) treatment with silica coating to simultaneously passivate undercoordinated Pb2+ions and bromine vacancies in red-emitting CsPb(Br/I)3PQDs. This approach nearly triples the photoluminescence quantum yield (PLQY, from 23% to 58%). Systematic structural, morphlogical, binding energy, Fermi level and optical analyses confirm effective defect suppression and enhanced exciton luminescence. The dual-passivated sample QDs:SB3-18@SiO2also exhibit excellent environmental stability, retaining 85% of their initial emission after 30 min in air and exhibiting improved UV resistance. By combining the PQDs with a CGSO:Tb3+mechanoluminescent phosphor, a composite film is fabricated with bimodal optical response—color-selective photoluminescence under UV excitation and stress-activated green emission upon scratching. This work presents a robust route to high-performance PQDs and demonstrates their potential for advanced anticounterfeiting and smart optical applications.
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Small
·
2026
·
IF 11.8
Jiayu Zhang,Jinze Song,Liangliang Xie,Jiawei Li,Wenxin Liu,Alideertu Dong
Bacterial infections in the bloodstream, leading to sepsis, seriously endanger human health. Clinically, blood dialysis is the main treatment, yet is relatively ineffective in handling severe bacterial infections. To better meet the clinical demands for blood disinfection, a biological material with antibacterial, recyclable, and stable features needs to be designed and integrated into the blood dialysis strategy. In this study, we designed a magnetic nanosystem (Fe 3 O 4 /CeO 2 @BP) based on black phosphorus (BP) functionalized with Fe 3 O 4 and CeO 2 to enable a circulatory antibacterial strategy for static and dynamic blood disinfection. The introduction of Fe 3 O 4 endowed the nanosystem with sufficient magnetism for rapid recovery prior to circulation reflux. And the coordination between CeO 2 and BP significantly enhances the ROS generation performance of the nanosystem. In vitro antibacterial experiments demonstrated that the Fe 3 O 4 /CeO 2 @BP nanosystem efficiently and steadfastly inhibited the growth of both Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) over 20 antibacterial cycles. Furthermore, static and dynamic blood tests (simulating venous/arterial flow at two rates) achieved significant antibacterial effects without damaging blood components or physiological indicators. This study exhibits excellent antibacterial performance and reduces potential biosafety risks via complete material recoverability, offering an efficient, safe, and eco-friendly solution for blood disinfection.
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APPLIED SURFACE SCIENCE
·
2026
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IF 6.6
Duna Su,Jingsheng Ma,Chuanli Wu,Xiaobo Hu,Wan Jiang,Lianjun Wang,Xiuxun Han
Lead-free Cs 3 Cu 2 I 5 perovskite nanocrystals (NCs) are promising candidates for optoelectronic applications owing to their non-toxicity and intrinsic blue emission. However, their practical application is hindered by defect-dominated low photoluminescence quantum yield (PLQY) and poor environmental stability. Herein, we propose an ultrafast liquid‑nitrogen (LN) quenching strategy integrated with one‑pot synthesis, which delivers an ultra‑high cooling rate of 35 K/s faster than conventional ice‑water (IW) cooling (1 K/s). This abrupt thermal termination effectively suppresses Ostwald ripening, ion migration and surface ligand detachment, thereby promoting uniform size distribution, inducing lattice contraction and reducing the non-radiative defects. The obtained Cs 3 Cu 2 I 5 NCs exhibit a remarkable PLQY up to 85% and exceptional stability, maintaining beyond 80% of initial PL intensity after ambient storage for 35 days, aqueous exposure for 36 h and continuous UV irradiation for 48 h. Moreover, the LN-quenched NCs were successfully integrated into X-ray scintillator film achieving a spatial resolution of 10 lp/mm, and their colloidal ink enabled stimulus-responsive information encryption and fluorescence anti-counterfeiting patterns, attributed to enhanced self-trapped exciton (STE) emission and robust structural integrity. This work establishes ultrafast LN quenching as a universal and feasible strategy for fabricating highly luminescent and stable perovskite NCs, paving the way for multifunctional optoelectronic applications.
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Applied Materials Today
·
2026
·
IF 7
Zijun Yan,Yue Sun,Yurong Dai,Shuhui Wang,Guolong Chen,Yue Lin,Huanhua Wang,Hao-Chung Kuo,Zhong Chen,Tingzhu Wu
Atomic layer deposition (ALD) presents a promising avenue for improving the environmental stability of perovskite quantum dots (PQDs). However, standard ALD processes (120–200 °C) inevitably compromise the PQD lattice structure, while lower temperatures yield porous, non-protective films. To overcome this trade-off, we developed a sequential-temperature ALD strategy that synergizes low-temperature surface passivation with high-temperature densification. First, a low-temperature (65 °C) ALD stage deposits a surface modification layer around PQDs, which leverages energetic precursor molecules to selectively passivate surface/lattice defects, effectively suppressing non-radiative recombination within PQDs and boosting their luminescence efficiency. Crucially, this initial layer plays a pivotal role in preventing thermal degradation of the perovskite during subsequent processing and generates a hydroxyl‑rich surface. These reactive sites facilitate the second stage, a high-temperature (120 °C) ALD, to rapidly deposit a dense Al 2 O 3 protective barrier layer. Remarkably, this sequential process induces the formation of a chemically graded Pb–O–Al–O–Al 2 O 3 interfacial structure remediating defects within the initial layer, exhibiting intrinsic self-healing capability. The resulting CsPbBr 3 /Al 2 O 3 composite manifests exceptional environmental stability, particularly against moisture, representing one of the best performances reported to date for ALD-encapsulated bulk CsPbBr 3 films. Unlike complex hybrid encapsulation schemes, our streamlined, standalone ALD approach enables scalable PQD modification. White light-emitting diodes fabricated with these encapsulated PQDs demonstrate a wide color gamut (∼120% NTSC) and remarkable spectral stability. This work establishes a generalizable paradigm for ALD encapsulation of thermally sensitive materials.
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Materials Today Bio
·
2026
·
IF 11
Fudan Dong,Zhen Liang,Xiaping Yao,Zhen Zhang,Yuan Tao,Hui Chen,Ping Lu,Huiyun Xia,Junjie Zhang,Guojuan Pu,Tianyang Zhou
Fungal keratitis (FK) is a sight-threatening infection with poor outcomes due to rapid tear clearance and insufficient corneal penetration. To overcome the limitations, we developed an ion-activated mucoadhesive in-situ gelling system (TH-NLC-ISG) integrating terbinafine-loaded nanostructured lipid carrier (TH-NLC) into a gellan gum/carboxymethyl chitosan matrix. The optimized formulation exhibited a particle size of 25.27 ± 0.75 nm. Upon contact with simulated tear fluid, the formulation underwent rapid sol-gel transition, achieving a 70-fold viscosity increase (34 °C, shear rate 1 s −1 ), critical for prolonged ocular residence. Fluorescence imaging demonstrated ocular retention of fluorescein sodium-labeled TH-NLC-ISG exceeding 60 min, significantly longer than the non-gelling control. In vivo pharmacokinetic studies revealed markedly improved ocular bioavailability, with higher area under the concentration in ocular tissues-time curve of TH in the TH-NLC-ISG group compared to TH-NLC. Corneal penetration studies confirmed that TH-NLC-ISG exhibited longer corneal retention time and higher corneal drug retention compared to TH-NLC. The formulation demonstrated excellent ocular biocompatibility in vitro and in vivo . TH-NLC-ISG exhibited potent in vitro antifungal activity against Fusarium solani. and Aspergillus flavus. , with a lower MIC 50 value than TH suspension. In rabbits and mice FK models, TH-NLC-ISG group achieved complete corneal healing, reduced clinical scores and corneal perforation rates, displaying efficacy superior to conventional natamycin eye drops. By synergistically augmenting retention and corneal permeation, TH-NLC-ISG provides a transformative strategy for enhanced fungal keratitis therapy.
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