Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Zhaoshun Liu,Junli Xu,Fang Zhang,Lu Ji,Jiaxin Yang,Zhongning Shi
High-entropy materials have received increasing attention due to their unique physicochemical characteristics and remarkable properties for oxygen evolution reaction (OER). The synthesis of high-entropy metal phosphides (HEMPs) has rarely been reported owing to the incompatibility between different metal ions and phosphorus. Herein, the phosphorus vacancies (Pv) enriched N-doped C HEMPs (N-C@CoNiMnCuFeP/NF) for OER were prepared by a facile ZIF-derived phosphide method. Abundant Pv and amorphous structures increase the active sites and modulate the electronic structure of electrocatalyst to improve the OER performance. Besides, the synergistic effect among the metallic elements is beneficial for enhancing the electrocatalytic activity. Accordingly, HEMP-450 shows outstanding catalytic performance with the overpotential of 199 mV and continuously reacts for 140 hours without performance degradation for OER at 100 mA cm −2 . This work demonstrates a simple template strategy for reasonably preparing HEMPs electrocatalyst with rich Pv.
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Chemistry-An Asian Journal
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2024
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IF 3.5
Yicheng Wang,Qiyu Zhang,Chenxu Wang,Ayeza,Yating Zhang,Chao Hu
The utilization of renewable energy for electrocatalytic carbon dioxide reduction reaction (CO 2 RR) represents a pivotal technology in sustainable carbon conversion. Single-atom catalysts (SACs) featuring transition metal-nitrogen-carbon (M−N−C) structures have demonstrated exceptional electrocatalytic efficacy in CO 2 RR by maximizing atom efficiency. Nevertheless, further investigation is warranted to optimize the catalytic performance of SACs through the selection of suitable carbon sources and supports, as well as the modulation of the microenvironment surrounding individual metal atoms. In this study, a sulfur-doped Ni−N−C catalyst was prepared using a two-step strategy involving metal ion adsorption and thermal decomposition, with porous ion exchange resin serving as the carbon source. Due to the uniform distribution of single atom active centers on the resin-based carbon support and sulfur doping, this catalyst efficiently converts CO 2 into CO with a Faradaic efficiency exceeding 90 % within the range of −0.69~−1.29 V (vs. RHE), reaching a maximum value of 97.7 % (−0.79 V vs. RHE). Theoretical calculations indicate that second-shell sulfur doping effectively promotes coupled transfer of protons and electrons, leading to a significant reduction in Gibbs free energy barriers for CO 2 RR intermediate products.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Aili Niyazi,Chaoqun Mu,Ting Wang,Wangsheng Ye,Lvling Zhong,Zhixian He,Haoyang Xu,Zhiqiang Zhang,Liang Zhang
In this work, temperature-responsive poly(N-isopropylacrylamide) (PNIPAM) and the guanylthiourea (GLA) were used to modify chitosan (CS) to prepare a novel PNIPAM/GLA/CS adsorbent for Ag(I) ions. Temperature variations near the lower critical solution temperature (LCST) facilitate the adjustment of functional group distribution within the composite material, thereby influencing its adsorption performance for silver ions. The characteristics of this composite material were confirmed using a variety of techniques, including scanning electron microscopy (SEM), variable-temperature ultraviolet-visible near-infrared spectroscopy, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Studies on the adsorption of Ag(I) ions by the PNIPAM/GLA/CS adsorbent indicated that the optimal pH for adsorption is 6.0. The adsorption kinetics were best described by the pseudo-second order kinetic model, while the equilibrium adsorption data aligned more closely with the Langmuir adsorption isotherm model, achieving a maximum adsorption capacity of 336.33 mg/g at 40°C. Experimental results demonstrated that higher adsorption amounts were observed above the LCST, while desorption of target ions was more favorable below the LCST. This research provides valuable insights for the design of new structural adsorbents.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
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IF 4.1
Yan Ma,Peng Zeng,Yan Ma,Xiaomei Yang
Supercapacitors have been extensively studied for their excellent power density and cycle life, but they are limited by low energy density. This study successfully prepared nitrogen/oxygen/boron (N/O/B) co-doped phenolic resin-based porous carbon materials (NBC) through a sol-gel method combined with high-temperature carbonization and activation processes, and systematically investigated their electrochemical performance in supercapacitors. By adjusting the amount of boric acid and the carbonization temperature, the pore structure and heteroatom doping levels of the materials were optimized. Experimental results demonstrate that when the carbonization temperature is 700 °C and the mass ratio of L-tyrosine to boric acid is 1:1, the obtained sample NBC-700-1 exhibits a high specific surface area (1721 m 2 g −1 ), an abundant micro/mesoporous hierarchical structure, and uniform N/O/B doping (N content: 8.31 at.%, O content: 14.11 at.%, B content: 0.55 at.%). In a three-electrode system, NBC-700-1 (377 F g −1 ) exhibits superior specific capacitance, high rate performance (73% capacitance retention at 20 A g −1 ), and long cycle stability at 0.5 A g −1 in 6 M KOH electrolyte compared to NBC-600-1 (300 F g −1 ), NBC-700-0.5 (290 F g −1 ), NBC-700-2 (268 F g −1 ), and NBC-800-1 (351 F g −1 ). Furthermore, a symmetric supercapacitor assembled with Na 2 SO 4 gel electrolyte achieves an energy density of 29.9 Wh kg −1 at a power density of 550 W kg −1 , along with broad temperature adaptability (−25 to 75 °C) and remarkable flexibility (no significant performance degradation after 180° bending). Additionally, the design of a PVA-based gel electrolyte with wide pH applicability provides new insights for the application of such devices in complex environments.
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ACS Applied Optical Materials
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2025
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IF 3.8
Xi Ran,Hang Xia,Jing Liu,Mohan Yuan,Xudong Hu,Ya Wang,Xinzheng Lan
Lead sulfide (PbS) colloidal quantum dot (CQD) photodetectors are promising devices for low-cost, high-performance, and large-area infrared imaging. For integration with readout integrated circuits (ROICs), top illumination is urgently required to ensure simultaneous light absorption and signal acquisition. However, the traditional best-performing p-on-n PbS CQD photodetectors rely on opaque top metal contacts, thus limiting the development of top-illuminated imagers. Herein, we addressed this issue by introducing a bifunctional ZnTe layer. The presence of the ZnTe layer─while allowing efficient hole collection─serves as a protective layer for the CQD layer during subsequent transparent electrode deposition. The resultant PbS CQD photodetectors based on the ZnTe layer show a specific detectivity of 2.09 × 1012 Jones at ≈1300 nm, representing approximately a 5-fold improvement over the control device (4.30 × 1011 Jones). This performance is comparable to that of the best PbS CQD photodetectors reported at similar wavelengths. The advantages of this architecture are further demonstrated by building a PbS CQD imager with a pixel array of 256 × 256, verifying the compatibility of photodetectors with ROICs.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Jie Mao,Huiyao Zhao,Runqi Yang,Yongzhi Meng,Mao Pi,Yuan Wu,Wei Yuan
Silicone rubber serves as a critical insulating material in electrical engineering due to its outstanding antifouling characteristics, mechanical robustness, and electrical performance. Nevertheless, its insulating properties require further enhancement to meet the demanding requirements of ultra-high voltage (UHV) applications, particularly for long-distance, high-capacity power transmission. In this work, we developed an improved insulating silicone rubber by grafting p–p conjugated N -vinyl carbazole (VK) groups—known for their space charge trapping capability—onto thiol-silicone oil, followed by cross-linking with end-methyl branched vinyl silicone oil. The modified material demonstrated optimal insulating performance at a VK group concentration of 0.5 wt%, achieving a 23.19% increase in breakdown field strength compared to unmodified silicone rubber films. This study provides a viable approach for enhancing the dielectric strength of polymer-based silicone rubber materials.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Zhenjie Zheng,Jingxuan Wang,Mengqi Ma,Yunpeng Xu,Da Huang,Jian Wang,Cuiying Lin,Zhenyu Lin,Fang Luo
Sensitive and selective detection of N -nitrosodimethylamine (NDMA), a highly carcinogenic environmental contaminant, is essential for public health and safety. In this study, we have developed a homogeneous electrochemiluminescence (ECL) biosensor for ultrasensitive NDMA detection by integrating Nafion-functionalized covalent organic framework (COF) with aptamer recognition and magnetic separation. The imine-linked COF (COF-LZU1) scaffold not only enables stable encapsulation of Ru(bpy) 3 2 + , but also creates a confined microporous environment that locally concentrates c (TPrA) and enhances the generation and survival of TPrA radicals, thereby amplifying the ECL signal. Nafion further improves Ru loading and ionic conductivity. Biotinylated aptamers were initially immobilized on streptavidin-coated magnetic beads (MBs) and hybridized with complementary DNA-modified Ru@COF-LZU1 to form Ru@COF-LZU1-MBs complex. Upon NDMA binding, a conformational switch releases Ru@COF-LZU1 into the solution. After magnetic separation, the ECL signal of the supernatant is measured in the presence of TPrA. This homogeneous format avoids electrode surface modification, which is commonly required in conventional Ru@COF-LZU1-based ECL sensors, offering improved reproducibility and simplified operation. The biosensor exhibits a wide linear range (100 fg/mL - 100 ng/mL) with a low detection limit of 9.11 fg/mL. This platform offers a sensitive, reproducible, and facile strategy for monitoring NDMA and similar small-molecule contaminants in complex matrices.
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Nano Materials Science
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2025
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IF 17.9
Yang He,Qingling Ruan,Han Kang,Ling Ye,Ya-Xiong Wang,Tiefeng Liu,Hairong Cheng,Xingxing Gu
Li-S batteries (LSBs), with their exceptional theoretical energy density, are widely recognized as a leading option for future energy storage solutions. Nevertheless, on the way to commercialization, the poor conductivity of the positive electrode, the easy dissolution loss of the active substance, and the serious dendrite growth of the negative electrode are stumbling blocks. Therefore, this work designs a novel tungsten and nitrogen-co-doped nanoporous carbon (W,N-C) with multifunction: chemically adsorbs the polysulfides to inhibit shuttling behavior, accelerates Li + transfer, and catalyzes polysulfides redox to address the aforementioned issues of LSBs. As expected at the beginning of the design, the prepared W,N-C-5/S composites cathodes demonstrate excellent performances, i.e., delivering an initial capacity of 944.9 mAh g −1 and a reversible capacity of 771.7 mAh g −1 after 500 cycles at 1 C, significantly outperforming the N-C/S contrast sample. The proposed method offers a feasible solution for boosting the electrochemical performance of LSBs.
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CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Shuo Wu,Tian Xia,Jianhui Xu,Shuchi Liu,Naike Wang,Shutong Tang,Xiaolin Liu
Humidity-induced self-healing offers a practical and environmentally sustainable strategy to improve material durability, yet its application in bituminous materials remains underexplored. This study presents a novel polyurethane (PU) synthesized with polytetrahydrofuran (PTMEG) as soft segments and isophorone diisocyanate (IPDI) as hard segments, combined with polar poly(N-isopropylacrylamide) (PNIPAM) to create a PU-PNIPAM copolymer featuring multiple hydrogen-bonding interactions. The PU-PNIPAM was incorporated into styrene-butadiene-styrene (SBS) modified bitumen, and rheological tests demonstrated that increasing PU-PNIPAM content enhances rutting resistance by improving creep recovery and reducing non-recoverable deformation. Optical microscopy observations under humid conditions revealed that PU-PNIPAM-modified bitumen exhibits humidity-responsive self-healing capabilities, with healing efficiency dependent on additive concentration. The humidity-induced self-healing mechanism of PU-PNIPAM was characterized by Fourier Transform Infrared Spectroscopy (FTIR), which monitored temporal evolution of the hydrogen bond index (HBI) under controlled humidity. A monotonic HBI increase confirmed aqueous hydrogen-bonding formation between PU and PNIPAM, driving autonomous repair. Water absorption and contact angle measurements revealed that despite PNIPAM-enhanced hydrophilicity of PU, incorporation of PU-PNIPAM into SBS-modified bitumen maintained bulk hydrophobicity, exhibiting water absorptivity below 1 wt% (deionized water) and 0.4 wt% (rainwater) after 4-day immersion. This strategy circumvents energy-intensive thermal healing, establishing an energy-efficient humidity-activated repair mechanism for bituminous composites. Crucially, the technology enables autonomous road maintenance in humid environments through continuous micro-crack sealing, extending service life while reducing resource consumption, maintenance frequency, and environmental footprint.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Qiansheng Li,Yi Dai,Hong Lu,Xiaoman Li,Fanghao Cheng,Jiti Zhou
Microbial-driven Fenton reactions are essential sources of reactive oxygen species in the aqueous environment and important pathways for pollutant degradation. However, their rates are usually limited by microbial respiration. Herein, N and Fe co-doped CDs (N, Fe-CDs) were used to construct a biological Fenton system with marine community YEP-1 for ketoprofen (KTP) removal. The addition of N, Fe-CDs significantly increased the aerobic degradation rate of KTP by 60.8 % at 48 h. Further analysis showed that N, Fe-CDs enhanced the microbial electron transfer system activity of YEP-1 to produce more H 2 O 2 . Moreover, the regeneration of Fe(II) in extracellular N, Fe-CDs was achieved under aerobic conditions, which was beneficial to activate the extracellular H 2 O 2 for more ·OH generation. Based on the metagenome analysis, N, Fe-CDs significantly increased the populations of genera Exiguobacterium , Leucobacter and Microbacterium . The enriched genes related to electron transfer and Fe(III) reduction were found to be closely associated with Microbacterium . Furthermore, the relative abundances of genes related to the chemotaxis and degradation of aromatic compounds were also increased. These results indicated that biological enzyme-catalyzed processes and N, Fe-CD-mediated Fenton reaction were jointly involved in KTP degradation. This work further advances our understanding of N, Fe-CDs-mediated microbial Fenton reactions.
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TRENDS IN BIOTECHNOLOGY
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2025
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IF 14.9
Guozhen Ma,Xiaolong Jiang,Bin Yang,Linxing Li,Ruiying Liu,Qing Meng,Jiawei Li,Lijie Xie,Han Guo,Sijia Liu,Yuxuan Wang,Yibo Wang,Xiaojing Zhao,Ziyu Li,Yujie Wang,Menglei Xia,Di Huang
The growing demand for N -acetylneuraminic acid (NeuAc) has driven the need for efficient and environmentally sustainable biomanufacturing processes. Microbial fermentation offers a promising route, yet optimizing cell factories with excellent phenotypes remains challenging. Here, we engineered Escherichia coli to enable high-efficiency co-utilization of glucose and glycerol. We refactored two synthetic pathways with the same start and end to enhance N -acetylmannosamine (ManNAc) precursor levels and optimized NeuAc synthase using artificial intelligence (AI) techniques and machine learning (ML) sequence mining. Subsequently, phosphoenolpyruvate (PEP) levels were boosted by capturing carbon flow from competing regeneration pathways, thus balancing the intracellular PEP:ManNAc ratio for improved NeuAc synthesis. Besides glucose, an additional carbon inlet from glycerol was opened, achieving a NeuAc titer of 70.4 g/l in fed-batch fermentation with a productivity of 1.17 g/l/h. This work demonstrates a highly efficient microbial cell factory for the biosynthesis of NeuAc and provides a versatile system engineering strategy applicable to other high-value compounds.
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ANALYTICA CHIMICA ACTA
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2025
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IF 6
Shuyue Sun,Yonglin Feng,Haonan Li,Sijia Xu,Huijuan Huang,Xuan Zou,Ziquan Lv,Xiangjie Yao,Shuiqing Gui,Yinghua Xu,Xiaobao Jin,Xuemei Lu
Background Infections caused by foodborne pathogens pose a major threat to human health. Traditional bacterial detection methods, such as plate culture and polymerase chain reaction, cannot meet the growing demand for fast and accurate detection. In contrast, colorimetric sensors have the characteristics of convenience, speed, and visualization, but their specific sensitivity is relatively poor. Therefore, it is necessary to develop a biosensor with selective identification of foodborne pathogens, high sensitivity, and early detection of foodborne pathogen contamination in food. Results We have developed a broad-spectrum microbial detection biosensor platform MDC@N-MMCNs that combines antimicrobial peptides as identifying ingredients with mesoporous carbon with peroxidase-like activity to detect and eliminate foodborne pathogens rapidly. In this study, nitrogen-doped magnetic mesoporous carbon nanospheres (N-MMCNs) were prepared using ferric nitrate as the magnetic source. Musca domestica cecropin (MDC) has abundant recognition sites on the surface of bacteria, which helps to recognize and amplify the signal, and combines with N-MMCNs to form MDC@N-MMCNs. MDC@N-MMCNs have high stability, specificity, and sensitivity, with a visual detection limit as low as 10 2 CFU/mL. The MDC@N-MMCNs paper-based sensor enables selective and rapid detection of four foodborne pathogens via a smartphone application. Significance Based on these findings, we believe that MDC@N-MMCNs hold great potential for on-site bacterial infection diagnosis in resource-limited environments or point-of-care (POCT) settings, offering a simple, cost-effective solution for food safety and public health.
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