JOURNAL OF MOLECULAR STRUCTURE
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2026
·
IF 4.9
Chao Wu,Yuqi Sun,Xueling Liu,Ruining Shi,Qiuxuan Li,Chenghao Yin,Rui Zhang,Chao Xu,Guoshuai Zhang,Haitao Han
A polyhedral coordination cage (PCC) was constructed as a confined nanoreactor. • Ultrafine Cu nanoparticles of approximately 1 nm were uniformly stabilized in PCC. • Cu NPs@PCC achieved 99.09% metronidazole removal within 15 min. • PMS activation involved synergistic radical and nonradical oxidation pathways. • The catalyst showed good stability, recyclability, and broad pollutant applicability. Developing PMS-based heterogeneous catalysts with high activity and durability is limited by the aggregation and deactivation of active metal species. Herein, a cobalt-based thiacalix[4]arene polyhedral coordination cage (PCC, compound 1) was constructed as a confined nanoreactor for stabilizing ultrasmall Cu nanoparticles, yielding a Cu NPs@1 catalyst for PMS activation. The abundant exposed nitrogen-donor sites within the PCC enabled uniform confinement of ∼1 nm Cu nanoparticles and effectively suppressed their aggregation. Benefiting from the confined catalytic environment and highly dispersed active sites, Cu NPs@1 exhibited excellent activity toward metronidazole (MTZ) degradation, achieving 99.09% removal within 15 min ( k obs = 0.27 min -1 ). The catalyst maintained high performance under various pollutant concentrations, coexisting ions, and repeated cycles, and also efficiently degraded rhodamine B and tetracycline. Mechanistic studies revealed that PMS activation involved both radical and nonradical pathways, with 1 O 2 , ·OH, ·SO 4 - , and ·O 2 - contributing to pollutant oxidation. LC-MS analysis revealed that MTZ underwent hydroxylation, bond cleavage, and ring-opening reactions, leading to progressive degradation and mineralization. This work provides a coordination cage confinement strategy for constructing highly dispersed metal nanoparticle catalysts toward advanced oxidation processes. A cobalt-based thiacalix[4]arene polyhedral coordination cage (PCC) was employed as a confined nanoreactor to stabilize ultrasmall Cu nanoparticles for efficient PMS activation. The resulting Cu NPs@PCC catalyst enabled rapid metronidazole degradation through synergistic radical and nonradical pathways involving 1 O 2 , ·OH, ·SO 4 ⁻, and ·O 2 ⁻. The coordination-cage confinement effectively suppressed nanoparticle aggregation, enhanced catalytic stability, and provided a versatile strategy for advanced oxidation catalysis. Download: Download high-res image (355KB) Download: Download full-size image
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RUSSIAN JOURNAL OF ORGANIC CHEMISTRY
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2026
·Vol. 62
·期 7
·154
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IF 0.8
Zhai Le,Zhang Bomin,Wang Hongshe
A green and highly efficient protocol has been developed for the synthesis of 2,3-dihydroquinazolin-4(1 H )-ones via the cyclocondensation of 2-aminobenzamide with various aldehydes or ketones. The reactions proceed smoothly at room temperature in water, utilizing a catalytic amount of humic acid as an environmentally benign, cost-effective, and highly recyclable heterogeneous catalyst. This operational method offers several key advantages, including the use of an aqueous medium, mild operating conditions, excellent product yields, simple workup procedures, and seamless scalability to a gram scale.
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JOURNAL OF RARE EARTHS
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2026
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IF 9.6
Yuejia Wu,Li Li,Lina Su,Ling Huang
The elemental doping strategy was widely adopted to improve the ion transport of lanthanum silicate apatites (La 9.33 Si 6 O 26 , LSO), a very promising electrolyte for solid oxide fuel cells (SOFCs). Specifically, La 9.33 Si 5.5 (Ga 1/2 V 1/2 ) 0.5 O 26 , i.e., LSGV 0.5 is obtained through (Ga 1/2 V 1/2 ) 4+ doping, which leads to not only a 4-fold oxygen ion conductivity (15.8 mS/cm at 800 °C) improvement, but also a 150 °C reduced sintering temperature compared with that of LSO. The as-such fabricated SOFC achieves a peak power density of 0.357 W/cm 2 at 800 °C using LSGV 0.5 as the electrolyte, demonstrating the effective complex ion doping towards enhanced performance for apatite-based electrolytes.
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Energetic Materials Frontiers
·
2026
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IF 4.7
Yi-ming Wang,Hai-long Huang,Yun-long Zhang,Yue-wen Wang,Shao-li Chen
Energetic molecular perovskite (H 2 dabco)[NH 4 (ClO4) 3 ] (DAP-4) had attracted much attention due to their strong oxidizing ability and high energy characteristics. However, the high thermal decomposition temperature would affect their potential application in the fields of propellants. In this work, Fe-doped carbon (Fe-Carbon) composites were prepared by a simple and facile high-temperature carbonization method with the iron salt-contained biomass flour materials as carbonized porous precursor. And the influence of Fe-Carbon composites on catalytic thermal decomposition and combustion on DAP-4 was studied. The results showed that porous Fe-Carbon composites with the low contents of Fe x O y showed the intrinsic catalyzed decomposition properties towards DAP-4. With the adding of 5wt% Fe-Carbon-3, the thermal decomposition temperature of DAP-4 had reduced by 25 °C from 374 °C (DAP-4) to 349 °C (DAP-4/Fe-Carbon-3). The apparent activation energy of thermal decomposition of DAP-4 had reduced by 16.25 kJ·mol -1 with the appearance of Fe-Carbon-2. DAP-4/Fe-Carbon-3 had a shorter combustion process (∼80 s) than DAP-4 (∼110 s). The maximum combustion temperature and combustion heat had increased. The catalysis thermal decomposition and combustion mechanism of DAP-4 with Fe-Carbon was provided. Fe x O y with high dispersion at the surface of carbon materials enhanced hydrogen transfer from ammonium and protonated H 2 dabco 2+ cations to perchlorate anions, which accelerated decomposition and combustion reaction of DAP-4. This work showed a novel understand of catalysis decomposition and combustion reaction of energetic molecular perovskite by metal-doped carbonization materials.
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JOURNAL OF POLYMER SCIENCE
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2026
·
IF 3.9
Wenjing Dong,Xianteng Feng,Xiaolin Zhao,Yanqi Liu,Xinyi Chen,Ze Kan
Owing to inherent limitations such as low melt strength and slow crystallization rate, poly(4-hydroxybutyrate) (P4HB) exhibits unsatisfactory foaming performance and oil adsorption capacity. Herein, a shear-induced in situ fibrillation process is integrated with supercritical CO 2 foaming to fabricate P4HB/polyaryl polymethylene isocyanate (PAPI)/polyvinylidene fluoride (PVDF) foams. This strategy enhances the crystallization behavior and melt strength of chain-extended P4HB, suppresses foam shrinkage, and improves both foaming ability and oil adsorption performance. The resulting foam achieves a maximum expansion ratio of 45.9 and a cell density of 5.8 × 10 12 cells/cm 3 . Notably, the foam with 2 wt% PVDF exhibits the highest oil adsorption capacity, reaching 28.1 g/g for CCl 4 . This work provides an effective strategy for overcoming the challenges of P4HB foaming and demonstrates significant potential for expanding its applications in oil adsorption and related fields. Graphical The incorporation of PVDF improves the cellular structure and suppresses foam shrinkage, leading to more refined cell sizes with a uniform distribution. Simultaneously, the significant increase in the material's expansion ratio contributes to the enhanced oil adsorption capacity of the foam. As a result, a high-performance, bio-based, and environmentally friendly oil-absorbing material is obtained.
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ChemistrySelect
·
2025
·Vol. 10
·期 24
·e02076
·
IF 2
Long Guan,Lin Li,Xin Cheng,Kefei Lu,Hao Zhou,Binbin Zhang,Erhai An,Hua Fang,Peng Deng
Graphical Synergistic catalysis ignition and combustion reaction mechanism of nanothermite Al/Bi2O3 with DAP-4 as additives. Aluminium/bismuth trioxide (Al/Bi 2 O 3 ), as a class of important and interesting nanothermite, had received much attention in the field of energetic materials. However, enhancing the ignition and combustion performance of Al/Bi 2 O 3 is still a great challenge. In this work, energetic perovskite DAP-4 was used to design and fabricate the ternary composites Al/Bi 2 O 3 /DAP-4 with the different contents of DAP-4 additives. The micromorphology and structure of composites Al/Bi 2 O 3 /DAP-4 were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The ignition and combustion performances of composites Al/Bi 2 O 3 /DAP-4 were studied by electric heating ignition apparatus. The results showed that energetic perovskite DAP-4 was introduced to reduce the ignition energy of Al/Bi 2 O 3 and promote the combustion reaction of Al metal particles. With 10wt% DAP-4 added, Al/Bi 2 O 3 /DAP-4 sample showed a more durable combustion process for ∼270 ms. And with the contents of DAP-4 increased, the combustion time shortened and the burning intensity had improved. The intensity of flame combustion reaches the maximum when 30wt% DAP-4 is added. The main thermal decomposition gas products of Al/Bi 2 O 3 /DAP-4 composite are CO 2 , HCl, H 2 O, and so on. A synergistic catalysis ignition and combustion reaction mechanism of Al/Bi 2 O 3 with DAP-4 as additives was proposed. DAP-4 ignited by lower ignition energy could trigger nanothermite Al/Bi 2 O 3 . Bi 2 O 3 particles can reduce the thermal decomposition temperature of DAP-4, which accelerated the combustion reaction of nanothermite Al/Bi 2 O 3 with DAP-4 as additives. This work offered a new idea for design and application of nanothermite with high-performance catalysis additives.
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ACS Applied Polymer Materials
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2026
·
IF 5.2
Rui Zhang,Zhengfeng Xie,Yujie Hu,Jie Li,Hong Liao,Junjie Gao,Wei Shi,Chuxiang Zhou
The complexity of pollutants in water, including endocrine-disrupting chemicals, dyes, and antibiotics, poses a challenge to existing water treatment agents. Therefore, we successfully cross-linked tris(4-formylphenyl)amine (TFPA) onto β-cyclodextrin (β-CD) to synthesize a β-cyclodextrin polymer (TFPA-N-β-CD). This unique adsorbent provides essential adsorption properties from each of its components: β-CD offers a cavity structure and hydrophilic groups capable of removing organic micropollutants through host–guest interactions, while TFPA not only constructs a three-dimensional network structure to enhance the specific surface area (63.68 m2/g) but also provides adsorption sites. In single-component systems, the adsorption of bisphenol A (BPA), methylene blue (MB), and tetracycline (TC) follows the pseudo-second-order kinetic model and the Sips adsorption isotherm model. The maximum adsorption capacities are 164.73 (BPA), 272.03 (MB), and 33.89 mg/g (TC). In binary system mixed adsorption, each pollutant still maintains significant adsorption capacity, with adsorption capacity ratios (Rq) greater than 0.80. This reveals the different mechanisms behind the adsorption of TFPA-N-β-CD. During the adsorption of BPA, host–guest interactions dominate, while electrostatic forces are stronger than hydrophilic and inclusion interactions in MB adsorption, and hydrophilic interactions play a dominant role in TC adsorption. Additionally, after 10 consecutive adsorption–desorption cycles, the adsorption capacity of TFPA-N-β-CD for the target pollutants was maintained at over 55% of its initial value, demonstrating its excellent cycling stability and potential for reuse. These characteristics make it highly promising for the treatment of complex real wastewater.
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ACS Catalysis
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2026
·
IF 13.1
Jie Li,Pengpeng Shao,Peng Lei,Di Zhang,Chengpeng Liu,Shilu Chen,Yingnan Chi,Changwen Hu
Proton shuttles play a vital role in diverse chemical transformations; however, most known examples, such as water and small organic molecules, operate in homogeneous systems with colocated proton donor and acceptor sites. In contrast, recyclable proton shuttle catalysts with spatially separated donor and acceptor sites are highly desirable due to their enhanced flexibility in proton transfer but remain largely unexplored. Herein, we identify the polyoxoniobate K7HNb6O19·13H2O (KNb6) as a special type of recyclable proton shuttle catalyst that enables rapid cleavage of lignin β-O-4 ketone into value-added phenol (yield: 93%) and benzonitrile (yield: 73%) within 10 min, using NH2OH·H2O as the N-source. Combined computational and experimental studies reveal that the unique surface of KNb6, featuring a proton-donating hydroxyl group (−OH) surrounded by multiple proton-accepting oxo ligands (O2–), facilitates a proton-shuttling mechanism that drives both Cβ–O and Cα–Cβ bond cleavage of a ketoxime intermediate formed in situ. Moreover, KNb6 maintains a stable catalytic performance over multiple cycles and efficiently promotes the depolymerization of oxidized natural lignin. This work not only provides a robust and recyclable catalyst for biomass valorization but also offers insights into the design of recyclable proton transfer systems.
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JOURNAL OF CHROMATOGRAPHY A
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2026
·
IF 4
Mingyi Du,Xiran Chen,Yaming Sun,Jiadu Hu,Wenlin Wen,Hanhong Xu,Zhibin Yin,Xinzhou Wu
MBSA-SiO2@Au nanoshells enabled selective enrichment and SALDI-MS of QACs. • The bifunctional platform served as both adsorbent and ionization matrix. • The method achieved 0.5–1.5 ng/mL LODs with 20–40-fold sensitivity enhancement. • Recoveries of 87.0–108.8% were achieved in white radish, carrot, and potato matrices. The widespread use and persistence of quaternary ammonium compounds (QACs) in food environments raise concerns about their detection at trace levels in complex matrices. In this study, we developed a negatively charged 4-mercaptobenzenesulfonic acid functionalized SiO 2 @Au core-shell nanocomposite (MBSA-SiO 2 @Au) that serves as both a selective adsorbent and an efficient surface-assisted laser desorption/ionization (SALDI) matrix. The sulfonate modified gold shell provides a stable negative surface potential to promote electrostatic interactions with cationic QACs, and their plasmonic properties synergistically enhance laser energy absorption and ionization efficiency. Critical enrichment parameters, including adsorbent amount, solution pH, adsorption time, and redispersion volume, were optimized. The optimized method achieved limits of detection of 0.5 ng/mL for paraquat (PQ), dodecyltrimethylammonium chloride (DTAC), and didodecyldimethylammonium chloride (DDAC), and 1.5 ng/mL for dodecyldimethylbenzylammonium chloride (DBAC), with excellent linearity (R 2 ≥ 0.9843), achieving an enrichment factor of approximately 33.3, and a 20- to 40-fold sensitivity enhancement after enrichment. Application to real food samples, including white radish, carrot, and potato, revealed no detectable QAC residues and satisfactory recoveries ranging from 87.0 to 108.8%. The bifunctional MBSA-SiO 2 @Au-based SALDI platform minimizes organic solvent consumption and offers a rapid, green, and sensitive approach for monitoring QACs in food safety applications.
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PubMed
高影响因子
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
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2017
·
IF 0.809
Jin Luo,Anlin Zhao,Caihua Zheng,Tao Wang
GRAPHICAL Display full size
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FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
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2023
·
IF 2.3
Wei Li,Bei Xi,Jing Ma,XiaoXia Tian,Xu Gao,YanZhong Yang,Liang Xian
Ultrafine Pt nanoparticles (Pt/SWCNTs) supported on single-walled carbon nanotubes (SWCNTs) were prepared by a photochemical method assisted by ethylene glycol (EG) as a reducing agent without the addition of stabilizing agents. the application in the reduction of 4-Nitrophenol (4-NP) was also explored. XRD diffraction patterns show that the content of Pt (111) crystal planes is higher, which is beneficial for improving the catalytic activity of platinum nanoparticles. TEM results showed that Pt/SWCNTs-E3 prepared under Ultra Violet (UV) light irradiation had a small-size particle with an average particle size of about 2.2 nm. XPS results showed that the prepared Pt nanoparticles mainly existed in the form of Pt0. The catalytic performance test results showed that the Pt/SWCNTs prepared under the UV condition of 395 nm had the highest activity for catalyzing the reduction of 4-NP, and the apparent rate constant was k = 0.34 min−1, indicating that it had good catalytic activity. After seven cycles, the conversion rate remains about 83%, which has good reusability and stability. The results show that the aggregation of Pt intermediates can be effectively controlled by photo-induced and strong metal − support interaction (SMSI) to obtain ultrafine nanoparticles dominated by Pt0.
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Surfaces and Interfaces
·
2026
·
IF 6
Yujiao Zou,Bo Ge,Yanhui Hu,Yulu Yang,Ni Li,Yili Zhao
The high catalytic performance induced by the photothermal conversion effect holds immense potential in environmental purification, attracting widespread attention. Herein, the synthesis of PVA/PEI/Au nanofibers was successfully achieved, and they were applied as plasmonic photothermal catalysts to facilitate the reduction of 4-nitrophenol (4-NP). The photothermal performance of nanofibers loaded with different concentrations of Au nanostars (NSs) was compared under near-infrared (NIR) laser irradiation. Remarkably, at low laser power densities under NIR irradiation, the PVA/PEI/Au nanofibers catalyzed the reduction of 4-NP, resulting in a 1.5-fold increase in reaction rate and achieving a 98% conversion efficiency within 8 min. Additionally, the nanofibers demonstrated excellent recyclability, maintaining a conversion efficiency exceeding 97% over six consecutive cycles. The PVA/PEI/Au nanofibers hold significant promise for the practical application of electrospun nanofibers in the photothermal degradation of environmental pollutants.
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