CHINESE JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 4.6
Wang Jing,Wang Shuai,Tong Hai-Xu,Liu Na,Wu Zong-Quan
The helical structures found in biological systems, such as DNA, have inspired significant research interest in artificial helical polymers, owing to their strong potential for applications including chiral recognition and resolution, asymmetric catalysis, and other related areas. However, the preparation of single-handed helices from achiral starting materials, as well as the exploration of their chiral resolution behavior, continues to represent a considerable challenge. In this work, we present the rational design and synthesis of optically active helical poly(phenyl isocyanide)s through helix-sense selective polymerization (HSSP) of achiral phenyl isocyanide monomers, catalyzed by enantiopure Pd(II) complexes bearing S - or R -configured ligands (Pd(II)/L S or L R ). The polymerization exhibits living and controlled characteristics, allowing for the precise modulation of molecular weights ( M n ) with exceptionally narrow distributions ( M w / M n ). The resulting polymers exhibit intense optical activity and demonstrate outstanding performance in chiral recognition. Specifically, these chiral materials are utilized as a chiral stationary phase (CSP), which can separate various racemates including α -methylbenzylamine, cobaltic acetylacetonate, and 2-hydroxy-2-phenylacetophenone. Additionally, when applied as a chiral crystallization agent, the polymer enabled the resolution of racemic Z -Alanine via enantioselective crystallization, yielding an enantiomeric excess ( ee ) as high as 81%.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 8
·550
·
IF 5.4
Ma Guozhi,Wang Xuan,Cai Jihai,Wang Xiaoying
The rapid detection of Salmonella is an essential precautionary measure to ensure food safety and prevent foodborne illness. In this study, based on the specific binding between mannan oligosaccharides (MOS) and type I fimbriae of Salmonella typhimurium ( S. typhimurium ), an efficient sensing strategy was developed. Obtained by enzymatic hydrolysis of konjac glucomannan, MOS were grafted to mannan-oligosaccharide modified carbon dots (g-CDs-MOS). It is worth noting that the introduction of MOS reduced the dissociation constant (K D ) between fabricated g-CDs-MOS and Con A from 25.4 µM (g-CDs and ConA) to 6.22 µM. This enhanced binding affinity stem from elevated density of MOS on surface of g-CDs. Furthermore, to construct recovery-type fluorescent probe, g-CDs-MOS was bonded onto two-dimensional quencher such as 3-aminobenzeneboronic acid-functionalized graphene oxide (GO-PBA), MnO 2 or MoS 2 . The g-CDs-MOS/MoS 2 exhibited the best sensitivity due to the high electron mobility of MoS 2 . Its fluorescent intensity was logarithmically responsive to concentration of S. typhimurium within the range of 10 2 -10 8 CFU·mL − 1 , and the corresponding limit of detection was as low as 11.79 CFU·mL − 1 . This fluorescent sensor shows promise for the detection of S. typhimurium in food safety. Graphical
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CHEMISTRY-A EUROPEAN JOURNAL
·
2026
·
IF 3.6
Zhihong Yu,Yutong Kuai,Junkai Lin,Mulan Yang,Guihuan Chen,Ziyun Zheng,Yixi Huang,Aiju Li
Although lithium-sulfur (Li-S) batteries exhibit extensive potential application as a novel type of rechargeable battery, their practical implementation is hindered by the shuttle effect of soluble polysulfides and the sluggish redox kinetics involved in converting polysulfides to Li 2 S 2 /Li 2 S. Herein, we synthesized cerium-zirconium oxide/carbon nanotube (CZO/CNT) composite via a facile hydrothermal-calcination method for use as a separator coating. In this material, the highly conductive network structure of CNTs optimizes charge transport pathways, ensuring rapid lithium-ion migration. Meanwhile, the strong polarity of CZO exhibits strong adsorption-catalytic capacity toward Lewis-basic polysulfides, thereby accelerating the reaction kinetics and improving the deposition efficiency of Li 2 S. Based on these merits, the Li-S battery utilizing CZO/CNT separator delivered a high discharge capacity of 1339 mAh g −1 at 0.1 C. In particular, the battery exhibited exceptional cycling stability, retaining a reversible capacity of 490 mAh g −1 for 800 cycles at 2 C, with a 0.059% capacity fade per cycle. This research demonstrates the potential of CZO/CNT composite in enhancing Li-S battery performance, offering a promising approach for developing advanced separator materials. Graphical This designed CZO/CNT-modified separator effectively facilitates Li 2 S deposition and enhances the redox kinetics. Consequently, the resulting Li–S battery exhibits robust cycling stability and remarkable capacity retention.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Jingfeng Cao,Xudong Leng,Jieyu Yang,Xuekun Jin,Fengjuan Chen,Haiming Duan,Biaobing Cao
The PtFeNC-S catalyst was obtained assisted bysodium thiosulfate. • PtFeNC-S exhibits excellent performance higher than that of Commercial PtC. • It can be attributed to the synergistic effects of FeN x sites, and C-S-C. • The catalytic mechanism is further clarified by DFT calculations. Reducing Pt loading is a promising strategy to scale up fuel cells and water electrolysis by optimizing catalyst design and active site distribution, achieving high efficiency with minimal precious metal. A Pt-loaded cathode catalyst (PtFeNC-S) was synthesized, in which Pt nanoparticles were uniformly distributed on the FeNC-S substrate using sodium thiosulfate, and it exhibited excellent oxygen reduction reaction (ORR) performance. TEM analysis reveals uniform dispersion of Pt nanoparticles (Pt NPs) with sizes of 2–5 nm, while XPS confirms the retention of FeN x active sites. The optimized PtFeNC-S catalyst exhibits a half-wave potential (E 1/2 ) of 0.86 V, 20 mV more positive than that of Commercial PtC (0.84 V), together with a kinetic current density of 11.95 mA cm −2 at 0.85 V and a Pt mass activity of 203.64 mA mg Pt −1 , substantially higher than that of Commercial PtC (3.92 mA cm −2 and 62.19 mA mg Pt −1 , respectively). Moreover, PtFeNC-S retains 88.8% of its initial current after 24 h of continuous operation, compared with 81.7% for Commercial PtC, and exhibits only a 13 mV decrease in E 1/2 after 10,000 accelerated durability cycles, lower than the 18 mV decrease observed for Commercial PtC. The high performance arose from both the uniform dispersion of Pt nanoparticles and the presence of C-S-C sites, along with FeN x sites that added further active centers for ORR. Density functional theory (DFT) calculations indicate that the downshift of d-band center for Pt was induced by synergistic interaction of Pt and FeN x sites, and S doping, thereby promoting OH desorption and augmenting ORR performance. The study presents a straightforward approach for synthesizing Pt catalysts that exhibit promising capabilities. Download: Download high-res image (251KB) Download: Download full-size image
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LANGMUIR
·
2026
·
IF 4.4
Zong Jiaxiang,Tang Yihan,Han Jiangang,Wu Guangyu,Xing Weinan
Designing stable photocatalysts with
optimized charge transfer
and surface kinetics remains a critical challenge for achieving solar-driven
CO 2 reduction. In this work, an amorphous FeOOH/covalent
organic frameworks (COFs) S-scheme heterojunction was rationally constructed
via a solvent-assisted strategy. The integration of defect-rich amorphous
FeOOH with the porous COFs matrix not only maximizes the interfacial
contact but also induces a strong internal electric field (IEF), enabling
directional charge migration and efficient carrier separation. The
optimized amorphous FeOOH/COF3 heterostructure exhibits a CO evolution
rate of 200.98 μmol·g –1 ·h –1 with a selectivity as high as 93.6% under visible-light irradiation,
outperforming the individual components. Spectroscopic and photoelectrochemical
studies confirm that the built-in electric field can effectively regulate
the formation of an S-scheme charge transfer pathway, which retains
the highly reducing electrons on COFs while maintaining the excellent
oxidation capability of FeOOH. This work highlights the crucial roles
of amorphous/crystalline interface engineering and IEF modulation
in constructing high-performance COFs-based photocatalysts and provides
new insights into designing efficient S-scheme systems for solar-driven
CO 2 conversion.
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Surfaces and Interfaces
·
2026
·
IF 6
Keer Tan,Jinping Zhao,Linfa Bao,Linjun Shao,Hanyun Liu,Yishuo Dong,Peng Yang
Catalytic combustion is a widely used technology for volatile organic compounds (VOCs) abatement, in which highly active catalysts play a key role. However, catalyst is prone to poisoning during the degradation of VOCs. In order to study anti-poisoning performance, the Cl, S and P heteroatoms were artificially introduced, and the corresponding doped CuO-ZrO 2 catalysts were prepared via a salicylic acid-assisted sol-gel method. The effects of heteroatom doping on the structure, acidity, redox properties and catalytic performance were systematically studied. The results showed that Cl, S and P doping effectively tuned the catalyst structure, active species dispersion and surface Lewis/Brønsted acid sites, which exerted a meaningful influence on catalytic performance of catalysts in the degradation of VOCs pollutants. In addition, compared with the undoped CuZrO, Cl-CuZrO exhibited the highest catalytic performance for degradation of toluene, chlorobenzene and p-chlorotoluene, indicating that the CuO-ZrO 2 catalyst system possessed excellent chlorine resistance. Meanwhile, S-CuZrO showed comparable performance to CuZrO, which demonstrated that the CuO-ZrO 2 catalysts had a certain degree of sulfur resistance. Through the design and optimization of heteroatom doping, this work provided valuable insights for enhancing the catalytic efficiency and structure stability of CuO-ZrO 2 based catalysts.
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Journal of Hazardous Materials Advances
·
2026
·
IF 9.1
Qingyao Fu,Yuzeng Wang,Yidi Zhang,Zhenlong Wu
Bisphenol compounds are recognized as persistent environmental pollutants and are strongly linked to various adverse pregnancy outcomes. Despite research progress on the reproductive toxicity of BPA on the ovaries and oocytes, the impact of BPA-related compounds on placental development remains unclear. In our study, BPA/BPS exposure induced structural abnormalities and dysfunction in nutrient transport within the placenta of pregnant mice, significantly inhibiting on the proliferation and migration of porcine trophoblast cells (PTR2), and increased apoptosis. Besides, BPA exposure resulted in upregulation of E-cadherin protein expression and the downregulation of fibronectin, vimentin, and ZEB2 protein expression. Additionally, BPA/BPS exposure also impaired angiogenesis of porcine vascular endothelial cells (PVEC). Mechanistically, BPA/BPS activated the endoplasmic reticulum stress (ERS) signaling pathway by enhancing p-eIF2α protein expression, which subsequently interfered with the epithelial-mesenchymal transition (EMT) process. Importantly, 4-phenylbutyric acid (4-PBA) and Salubrinal reversed these adverse effects, promoting EMT process and angiogenesis. Collectively, our study elucidates a novel ERS-EMT signaling axis as a potential mechanism underlying bisphenol-induced placental dysfunction.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Renzhi Xiong,Dongchen Duan,Feiyan Shi,Wenjun Zheng,Yanhe Xiao,Baochang Cheng,Shuijin Lei
Photocatalytic CO 2 reduction is primarily limited by inefficient charge separation and insufficient thermodynamic driving force. To address these intertwined challenges, this study constructs a novel S-scheme heterojunction by integrating the ferroelectric layered perovskite Bi 3 TiNbO 9 with the lead-free double perovskite Cs 2 AgBiBr 6 , which synergistically couples an interfacial built-in electric field with an intrinsic ferroelectric polarization field. This dual-electric-field design facilitates the efficient separation and directional migration of photogenerated charge carriers while preserving strong redox capability, thereby simultaneously overcoming both kinetic and thermodynamic limitations. The developed heterojunction exhibits outstanding CO 2 photoreduction performance, delivering a CO yield of 42.6 μmol g −1 h −1 , which is 6.7 and 26.6 times higher than those of the individual Cs 2 AgBiBr 6 and Bi 3 TiNbO 9 components, respectively. Moreover, it demonstrates excellent stability, retaining 89.3% of its initial activity after 48 h of continuous operation. Comprehensive characterization and theoretical calculations collectively confirm: (i) the successful construction of an intimate S-scheme heterojunction; (ii) the presence of a ferroelectric polarization field; and (iii) a significantly reduced energy barrier for COOH* formation, which promotes CO 2 reduction. The integration of ferroelectric effects with S-scheme heterojunction engineering presented in this work provides a promising strategy for developing efficient solar energy conversion systems.
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CEMENT AND CONCRETE RESEARCH
·
2026
·
IF 14
Zedong Zhou,Hangxi Liu,Juanlong Li,Yiru Yan,George Dan Miron,Barbara Lothenbach,Biwan Xu,Ming Fang,Xiaoli Tan,Bin Ma
Calcium silicate hydrate (C-S-H), the principal binding phase in Portland cement, plays a critical role in the immobilization of heavy metals, yet a quantitative and mechanistic understanding of Cu 2+ uptake by C-S-H remains incomplete. This study investigates the immobilization behavior of Cu 2+ by C-S-H with systematically controlled Ca/Si ratios (0.6–1.6) and develops a thermodynamically consistent sublattice solid-solution model. The C-S-Hs were synthesized under sorption equilibrium conditions and characterized to determine their structural evolution with Ca/Si ratio. Cu 2+ sorption was subsequently examined on pre-synthesized C-S-Hs, combined with spectroscopic analyses to elucidate Cu coordination environments. The results show that Cu 2+ is immobilized predominantly through structural incorporation at low Cu 2+ loadings rather than hydroxide precipitation. With increasing Cu 2+ concentration, Cu 2+ progressively intercalates into the interlayers of C-S-H, partially replacing interlayer Ca 2+ and forming Si-O-Cu linkages associated with Q 2 silicate sites. The Ca/Si ratio strongly controls both uptake capacity and binding mechanism. High Ca/Si ratios promote silicate-chain polymerization through conversion of Q 1 to Q 2 units, whereas extremely low Ca/Si ratios induce redistribution between Q 2 and Q b 2 species. At intermediate Ca/Si ratios, Cu 2+ is mainly stabilized as hydroxyl-associated species. Once the sorption capacity is exceeded, excess Cu 2+ transforms into CuO under alkaline conditions. Based on these observations, a CASH+Cu thermodynamic model incorporating five Cu-bearing endmembers was developed and calibrated using both aqueous and solid-phase data. The model quantitatively reproduces Cu uptake, solution chemistry, and phase assemblages, providing a predictive framework for Cu 2+ retention in cementitious systems.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Qing Huang,Zefeng Hou,Yunong Zhao,Ruiqin Gu,Chengli Li,Minghong Yang,Huan Liu
Surface plasmon resonance (SPR) technology, boasting prominent advantages including anti-electromagnetic interference, high sensitivity, rapid response, label-free detection, and minimal sample consumption, holds broad application prospects in life sciences, clinical diagnostics, drug screening, and other related fields. However, current optical fiber biochemical sensors are generally plagued by poor probe practicality and stability, low refractive index sensitivity, and inadequate detection capability for ultra-low concentration biomolecules in clinical settings. In this study, we developed a low-cost, high-sensitivity optical fiber SPR biosensor for SARS-CoV-2 antigen detection in the standard sample, employing gold@silver‑platinum (Au@AgPt) core-shell nanospheres as the sensing enhancement module. Au@AgPt core-shell nanospheres possess unique localized surface plasmon resonance (LSPR) properties. When incident light interacts with the nanomaterial surface, it induces a localized electric field enhancement effect. This surface enhancement effect significantly amplifies the optical signal intensity, thereby effectively improving the sensor's detection sensitivity toward the receptor-binding domain (RBD) of the SARS-CoV-2 spike protein. This sensing platform achieves fg/mL-level detection sensitivity, excellent linearity, and rapid response performance, offering new technical support for expanding the application of optical fiber sensors in the quantitative detection of ultra-low concentration disease markers.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaorui Zhang,Ziheng Yang,Zikang Zeng,Laiqing Zhang,Wenxuan Wang,Xiaohe Jiang,Xingwei Ge,Yujun Liang,Chuang Han
Nitroarene reduction, a critical route for synthesizing the corresponding amines. However, conventional thermocatalytic typically involves harsh reaction conditions (high temperature, pressurized hydrogen, and anaerobic atmospheres) and relies on precious metals or extended reaction times. Herein, we have achieved photocatalytic CO 2 emission-free hydrogenation of nitroarenes at ambient conditions by introducing isolated Cu single atoms (Cu SAs) synergize with self-adaptive S vacancies (Svs) in CdS. In the presence of hydrazine servicing as an efficient hole sacrificial agent with harmless oxidation products, current design could circumvent the need for precious metals, high temperatures, strong radiation, vacuum environments, or H 2 gas. It is demonstrated that the isolated Cu sites and S vacancies act as hole-trapping centers and electron-enriched regions, respectively, which facilitate the effective separation and prolong the lifetime of charge carriers in the region, and achieve 97 % conversion of 4-NA within 8 min under mild conditions, outperforming many previously reported photocatalytic systems. In addition, the optimal Cu-CdS-5 demonstrates remarkable recyclability along with wide substrate scope. This research is expected to provide a new insight into the construction of facile and environmentally friendly photocatalytic hydrogenation reaction system.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shihan Wang,Yuming Dong,Yongfa Zhu,Haifeng Shi
Polyethylene terephthalate is a major source of plastic pollution, posing significant environmental risks and requiring effective degradation methods. In the present work, the CuWO 4-x /Cobalt Phthalocyanine (CoPc) step-scheme (S-scheme) heterojunction was used as a photothermal-assisted photocatalyst to facilitate the degradation of polyethylene terephthalate via peroxymonosulfate activation in a cooperative photocatalytic system. The CuWO 4-x /CoPc sample exhibited optimal polyethylene terephthalate removal efficiency under the illumination conditions, reaching 83 % after the addition of 3 mM peroxymonosulfate. The influence of peroxymonosulfate dosage, aquatic environment, pH, and coexisting anions on polyethylene terephthalate degradation was thoroughly investigated. The X-ray photoelectron spectroscopy (XPS) and radical quenching experiment findings implied that the CuWO 4-x /CoPc composite followed the S-scheme heterojunction charge transfer process. Owing to the formation of the S-scheme heterojunction, the electron and hole transport and separation efficiency in the CuWO 4-x /CoPc photocatalyst was significantly enhanced. Infrared thermography images further revealed that the temperature rise of the solution during the catalytic process resulted from the photothermal property of CoPc, thus enhancing the degradation efficiency of polyethylene terephthalate plastics. Additionally, CuWO 4-x /CoPc demonstrated remarkable reusability and consistency in cycling experiments. This research presents an effective strategy by developing a photothermal-assisted S-scheme heterojunction system for the degradation of waste microplastics in aqueous environments.
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