TALANTA
·
2025
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IF 6.1
Chenyu Zhou,Jianxin Qiang,Wanyi Zhang,Yuntai Lv,Xingguang Su
The application of peroxidase-like nanozymes in on-site detection was often restricted due to the cumbersome operation caused by necessary step of adding H 2 O 2 . Herein, a novel composite peroxidase mimic CuO 2 @S/Cu-NC with self-supplying H 2 O 2 function was prepared by in situ synthesis of the copper peroxide nanodots (CuO 2 ) on the S/N co-doping carbon-based copper nanozyme (S/Cu-NC). The CuO 2 could produce H 2 O 2 in acidic environment, and the in situ formed H 2 O 2 could immediately bind to the active sites of S/Cu-NC, resulting in the greatly accelerated catalytic reaction efficiency. Because of the property of H + -induced H 2 O 2 production of CuO 2 @S/Cu-NC, the changes of pH value could affect its peroxidase-like activity. Therefore, a sensitive and convenient method for histamine sensing was established. Furthermore, a convenient test swab was designed for the portable histamine detection and visual monitoring the of seafood freshness, which showed great potential of multifunctional nanozyme in the field of food monitoring.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Baochuan Shao,Yanyan Ma,Liren Wu,Feiyang Xu,Mengyao Wei,Yuanbin Qin,Lei Liu,Yongmei Li,Yiru Ma,Fengyun Wang
Rechargeable sodium-ion batteries (SIBs) offer significant promise for the energy market due to their environmental friendliness, low cost, and high energy density. However, challenges such as volume expansion and sluggish reaction kinetics during charging/discharging limit the widespread practical development of SIBs. Herein, a hollow flower-like heterostructure composite material, g-Co 9 S 8 /MoS 2 @NS-C, was synthesized via a glucose-assisted hydrothermal method followed by a one-step water bath process, where g stands for glucose-derived carbon acting as the carbon structure. The hollow Co 9 S 8 framework derived from ZIF-67 provides structural stability, and accommodates volume changes during redox reactions. The Co 9 S 8 /MoS 2 heterointerface establishes a built-in electric field, which can promote the fast migration of electrons/ions. In addition, doped N and S heteroatoms within the carbon matrix and conductive carbon coating layer may cooperate synergistically not only to improve total conductivity, but also to generate more active sites. Consequently, when used as the anode of sodium batteries, the composite can exhibit a capacity value of 433.4 mAh g −1 after 200 cycles at 2 A g −1 , achieving superior capacity retention. Additionally, the electrode can still offer a particular capacity of 386.6 mAh g −1 at 5 A g −1 . Remarkably, it maintains 377.0 mAh g −1 after 200 cycles even at −30 °C under 50 mA g −1 , demonstrating exceptional low-temperature stability. This research can offer a possible route to high-performance anodes for SIBs.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
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IF 6.3
Jiayong Zhang,Xiangqian Shen,Jun Xing,Shuguo Yu,Mengge Li,Ding Ma,Yuting Sun,Rong Wu,Bin Yao
Air-processed kesterite solar cells show excellent prospects for commercial application because they are suitable for large-scale production. This study shows how the power conversion efficiency (PCE) of (Cu, Ag) 2 ZnSn(S, Se) 4 solar cells can be improved by adjusting the annealing time during the selenization process at a low temperature of 70 °C. Enhancement of PCE is achieved when the annealing time is 240 s. The primary determinant of enhanced PCE is a reduction in reverse saturation current density (J 0 ) and ideality factor (A). Examination of depth characterization indicated that the decrease in J 0 and A can be ascribed to the inhibition of [2Cu Zn + Sn Zn ] defects cluster, which is mainly accountable for the band tail states, and the suppression of interface recombination .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Shitong Yang,Meng Cun,Jianbo Guo,Tongzhe Wang,Kaiyue Wang,Hongfei Long,Yaohui Liu,Liyuan Liu,Qinzhong Feng,Yang Chen
Efficient and selective removal of Hg 2+ from Hg-contained wastewater remains a critical challenge in environmental remediation and advanced water treatment. In this study, a series of Hg 2+ -imprinted polymers were designed using bidentate S/N-coordinating allylthiourea (ATU) as the functional monomer. Different structural strategies were applied to enhance their selectivity and adsorption efficiency toward Hg 2+ . Comparative analysis of the structural features and adsorption behaviors of the polymers revealed effect of the imprinting effect and surface imprinting on Hg 2+ capture. SEM and BET results demonstrated that ATU-IIP/SiO 2 possessed a higher specific surface area and a more open porous structure, which facilitated the full exposure of binding sites and significantly enhanced Hg 2+ adsorption performance. Adsorption experiments showed that ATU-IIP/SiO 2 exhibited a rare stepwise adsorption process, with a twice the adsorption capacity that of ATU-IIP and reaching 70 % of equilibrium within 5 min. FTIR and XPS analyses identified S/N-containing groups ( CS NH ) dominated Hg 2+ coordination. Density functional theory (DFT) calculations further confirmed the positive role of Hg 2+ in promoting the transformation from C S to C S, supporting a dual-site synergistic coordination mechanism. Under coexisting ion interference, imprinted polymers achieved 84.3 % Hg 2+ removal and maintained over 80 % recovery after five reuse cycles, while exhibiting over 99 % Hg 2+ recovery from PVC industrial wastewater. This study provides new insights into the mechanisms of recognition, binding, and separation of Hg 2+ , offering a theoretical basis for its efficient removal from typical industrial wastewater.
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PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
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IF 6.3
Xiao Dai,Enting Deng,Wei Zhao,Lili Zhang,Ting Zheng,Jun Shen
In order to explore the influence of helical polymers on the polymerization behavior of methacrylate monomers, the helical cellulose tris(3,5-dimethylphenylcarbamate)s (CDMPC) was synthesized via “one-pot” procedure. Then a series of poly(methyl methacrylate)s (PMMAs) were synthesized through radical polymerization in the presence of CDMPC. The structure and properties of the resulting CDMPC and PMMAs were characterized by 1 H NMR, GPC, DSC and nitrogen absorption, respectively. The influence of the feed ratio of CDMPC to MMA and initiator concentration on the properties of PMMAs was carefully investigated. Interestingly, the PMMAs synthesized in the presence of CDMPC exhibited much higher molecular weight with a narrower distribution than those of PMMAs obtained without CDMPC. The former PMMAs possessed much higher content of chain segments from coupling termination than those from disproportionation termination. It indicated that the chain propagation was probably significantly accelerated with the modulation of CDMPC and the polymerization was then effectively ended via coupling termination, which agreed well with the observation in the real-time exothermic monitoring of the polymerization process. Furthermore, the end-group structure was investigated based on the structure of MMA oligomers synthesized in the presence of CDMPC, to gain a better understanding of the related mechanism. The helical CDMPC exhibited an efficient control on the molecular weight, its distribution and polymerization kinetics of PMMAs in the radical system, providing a valuable strategy for modulation of the radical polymerization of methacrylates. The influence of CDMPC on the tacticity of PMMAs was further examined.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·
IF 2.7
Zhigeng Chen,Siqi Lin,Yan Li,Zhenxun Huang
Poly(ester-imide)s (PEIs) are well-known for their ultralow dissipation factor (D f ) of 0.003 at 10 GHz recently. However, the dielectric constant (D k ) and D f seem to be two difficult-to-reconcile indexes in PEIs, a relatively high D k of 3.2 confines the insulating capability of PEIs, owing to the trade-off between the polymer's free volume and rigidity. To address this difficulty, a cross-linking strategy of polymer backbones is proposed to increase the free volume and maintain a rigid structure in PEIs. In this research, the crystallinity of a liquid-crystal-like PEI is gradually diminished, and the molecular chain spacing is slightly enlarged as the degree of cross-linking increases. Besides, the degree of the in-plane orientation of this PEI is obviously reduced, indicating the loose stacking of molecular chains. Consequently, the D k at 10 GHz of this PEI is decreased from 3.26 to 2.85 after cross-linking. Furthermore, the D f of the cross-linked PEI is remained as low as 0.00237. In addition, the tensile strength and elongation at break of this PEI are increased from 219 MPa and 7.4% to 231 MPa and 9.7% after cross-linking, respectively. And the thermal stabilities of the cross-linked PEI are also decent as a candidate for low dielectric materials.
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Energy Technology
·
2026
·Vol. 14
·期 8
·e70612
·
IF 3.6
Jianguang Jia,Yue Cui,Chunfeng Shi,Haijun Hao
Developing a sustainable and cost-effective counter electrode (CE) material with high catalytic activity is of significant importance for quantum dot-sensitized solar cells (QDSSCs). In this work, by using the industrial residue material of sulfonated asphalt as the carbon precursor, we prepared a CoFe/CoFe 2 O 4 embedded N, S-doped carbon hybrid (CoFe/CoFe 2 O 4 @C) and applied to the CE of QDSSC. Structure analyses indicated that CoFe/CoFe 2 O 4 @C has a porous structure with large surface area. Electrochemical investigations revealed that the CoFe/CoFe 2 O 4 @C possesses high catalytic activity for polysulfide reduction. Consequently, CdSe QDSSC based on CoFe/CoFe 2 O 4 @C CE achieved a high power conversion efficiency (PCE) of 6.37%, significantly superior to the commonly used PbS CE (5.4%). This study provides a sustainable strategy for converting the industrial residue material of asphalt into a low-cost and high-performance CE material for QDSSC.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Yingying Chen,Zhihua Liu,Jinshan Liu,Miao Zhou,Zhifeng Liu
The visible-light-driven photoelectro-Fenton technology integrates the synergistic advantages of photoelectrocatalysis and the Fenton reaction. However, the design of current photoanode materials still suffers from issues such as low interfacial charge transfer efficiency and insufficient exposure of active sites. In this study, a novel S-scheme ZnIn 2 S 4 /α-Fe 2 O 3 heterojunction photoanode was successfully constructed. The built-in electric field established at the S-scheme heterointerface effectively facilitates the spatial separation of photogenerated charge carriers. The S O bonds formed at the two-phase interface serve as atomic-level electron transport channels, enabling rapid and directional transfer of photogenerated electrons enriched in the conduction band of ZnIn 2 S 4 to the Fe 3+ sites on the α-Fe 2 O 3 surface, where Fe 3+ is reduced to Fe 2+ . The generated Fe 2+ promotes the conversion of H 2 O 2 to produce hydroxyl radicals (·OH), while the regenerated Fe 3+ from the reaction is again reduced to Fe 2+ by photogenerated electrons, establishing a self-sustaining cycle that endows the system with highly efficient oxidative degradation capability. The results demonstrate that the synergistic mechanism leads to a 5.55-fold increase in the degradation rate. Benefiting from the efficient directional charge transfer and separation, the total organic carbon (TOC) removal efficiency reaches 80.09% within 60 min.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yi Wen,Chenguang Qian,Xiaohan Li,Ruizhe Sang,Fang Yuan,Chunquan Li,Zhiming Sun
The development of heterojunction photocatalysts is pivotal in enhancing charge transfer and inhibiting the recombination of photoexcited electron-hole pairs, which is an effective strategy to improve CO 2 conversion. In this study, we have been assembled the TiO 2 @NH 2 -MIL-125 S-scheme heterojunction on the surface of diatomite. Comprehensive characterization confirms the S-scheme charge transfer pathway, which not only promotes preferential accumulation of photogenerated charges at catalytically active sites but also enables rapid, low-resistance charge separation and migration. Meanwhile, the introduction of diatomite improves the dispersion of the active components and accelerates the separation of photogenerated carriers driven by the built-in electric field. Consequently, the TiO 2 @NH 2 -MIL-125/diatomite composite exhibits selective photocatalytic CO 2 to CO conversion without requiring sacrificial reagents. The composite achieves a CO evolution rate of 13.53 μmol g −1 h −1 , which is 2.20 times and 1.33 times higher than pure TiO 2 and the binary TiO 2 @NH 2 -MIL-125 composite, respectively. Furthermore, the composite maintains a stable CO production rate after three reaction cycles. This study presents an approach to designing mineral-supported S-scheme heterojunction photocatalysts for solar energy conversion applications.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Maliang Zhang,Linlin Wang,Shuo Yang,Mengen Zhang,Ziang Mu,Yaru Wang,Xi Du,Zhenhuan Li,Bowen Cheng
This study uses polyphenylene sulfide (PPS) fiber paper as a skeletal support to fabricate a high-density, porous nonwoven support layer with excellent mechanical stability via wet papermaking. Sulfonated polyether ether ketone (SPEEK) is then cast onto its surface to form a continuous proton-conducting phase. Building on this foundation, synergistic doping with sulfonated graphene oxide (S-GO) and amino-modified silica (NH 2 –SiO 2 ) constructs a topologically interconnected proton exchange membrane structure exhibiting acid-base synergistic effects. The sulfonic acid groups on the S-GO surface act as high-density proton donors, providing continuous proton conduction sites. Meanwhile, the basic amino groups in NH 2 –SiO 2 form stable acid-base interactions and hydrogen-bond networks with sulfonic acids, effectively anchoring proton migration pathways, reducing disordered swelling, and extending proton hopping distances. This topologically interconnected acid-base synergistic network significantly enhances proton transport dominated by the Grotthuss mechanism while effectively suppressing methanol permeation. Performance testing reveals that the composite membrane with optimized doping ratio achieves proton conductivity up to 0.2 S cm −1 at 80 °C, with methanol permeability significantly lower than commercial Nafion-117 membranes. In direct methanol fuel cell testing, the composite membrane exhibited an open-circuit voltage of approximately 770 mV and a peak power density approaching 170 mW cm −2 , while demonstrating excellent thermal stability, oxidation resistance, and mechanical strength. These results demonstrate that constructing a topologically interconnected structure with synergistic acid-base interactions can effectively balance proton conductivity and fuel barrier performance, providing a viable new strategy for developing high-performance, low-cost proton exchange membrane materials.
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Journal of Energy Chemistry
·
2026
·
IF 15.6
Xingyang Wu,Yucui Xiang,Liyong Gan,Shuaijun Wang,Zhongkai Hao,Guo Qin Xu,John Hon Kay Yip
Selective solar-driven conversion of CO 2 into C 2 hydrocarbons under aqueous conditions is a promising route toward carbon neutrality. However, C 2 selectivity in water is severely constrained because the intrinsically slow C–C coupling requires sustained electron flux to build up coupling-relevant intermediates. This flux is readily depleted by the competing hydrogen evolution reaction and rapid carrier recombination. Here, we construct an in situ S-scheme heterojunction of CuO islands on two-dimensional (2D) N-TiO 2 (CuO/N-TiO 2 ) via a one-pot solvothermal strategy. The chemically anchored CuO islands on 2D N-TiO 2 nanosheets create a compact, coherent interface that facilitates interfacial charge transfer. Compared with an ex situ assembled counterpart, the in situ heterojunction shows more efficient S-scheme charge separation. In situ characterizations and theoretical calculations reveal that dynamically redox-cycling Cu 2+ /Cu + sites are beneficial for C 2 H 4 formation, with Cu + sites favoring *CO retention and Cu 2+ sites being more favorable for the subsequent asymmetric *CO–*CHO coupling step. Consequently, the as-prepared catalyst delivers 17.5 μmol g −1 ethylene in 4 h with 94.6% selectivity and robust cycling stability. This work establishes an in situ S-scheme heterojunction with oxide islands anchored on 2D nanosheets that integrates charge management with dynamic active sites for selective aqueous CO 2 -to-C 2 H 4 photoreduction. An in situ grown CuO-islands/2D N-TiO 2 S-scheme heterojunction promotes charge separation for aqueous CO 2 -to-C 2 H 4 photoreduction without sacrificial agents. The dynamic Cu 2+ /Cu + active sites favor *CO formation, asymmetric *CO–*CHO coupling, and ethylene selectivity. Download: Download high-res image (161KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Han Sun,Hui Wang,Hongru Jiang,Yingshuang Zhang,Chongqing Wang
Pyrrhotite tailings are upcycled into multifunctional silicone rubber composites. • S-doping induces robust SCN/Pyr heterojunctions via Fe-S-C interfacial linkages. • SCN nanosheets serve as phonon bridges to significantly reduce interfacial thermal resistance. • Simultaneous achievement of high TC (1.63 W/m·K) and EMI shielding (40 dB). The relentless miniaturization and densification of modern electronics have precipitated an urgent demand for materials that offer both efficient thermal management and robust electromagnetic interference (EMI) shielding. While utilizing industrial waste for such high-performance applications presents a sustainable pathway, bridging the performance gap in traditional polymer composites remains a challenge due to high interfacial thermal resistance. Herein, we propose a functionalization of waste strategy by engineering a multifunctional silicone rubber (SR) nanocomposite that synergizes pyrrhotite (Pyr) tailings with S doped graphitic carbon nitride (SCN). Specifically, SCN serves as a functional bridge, creating a heterojunction with Pyr that optimizes interfacial compatibility and phonon transport. Consequently, the fabricated SCN/Pyr/SR composite delivers a high thermal conductivity (TC) 1.63 W/(m·K) alongside outstanding electrical insulation with a resistivity exceeding 10 10 Ω·m. Furthermore, it delivers EMI shielding effectiveness of up to 40 dB in the 8.2–12.4 GHz frequency range with absorption being the main mechanism, underscoring its excellent shielding capability. Beyond these primary metrics, the composite demonstrates exceptional reliability in terms of thermal cycling stability, mechanical performance, and water resistance. This work not only provides a high-efficiency solution for thermal and EMI management, but also validates a sustainable route for upcycling bulk sulfide solid wastes to improve the environmental friendliness and the application potential of the composite. Download: Download high-res image (151KB) Download: Download full-size image
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