Catalysts
·
2023
·Vol. 13
·期 12
·1474
·
IF 3.9
Yuhang Cai,Anping Yin,Jianxiang Zhang,Jiatai Wang,Xiaofei Qin,Yibo Yang,Gaolei Qin,Xiaodong Sun,Peng He,Yong Yang
This study focuses on the synthesis and evaluation of carbon−coated Ni−Fe alloy catalysts (NiFex@C, x = 0, 0.3, 0.7, 1.1) for the hydrogenation of cinnamaldehyde. The catalysts were characterized using Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Raman spectroscopy, and X-ray Photoelectron Spectroscopy (XPS). The introduction of Fe was found to increase the average particle size of the bimetallic catalysts compared to the monometallic Ni@C. Ni existed in both metallic and oxide states, while Fe exhibited multiple oxidation states in the bimetallic catalysts. The carbon layer, approximately 2–3 nm thick, was confirmed to envelop the alloy particles. The catalytic performance of carbon−coated Ni−Fe alloy catalysts indicated that the addition of Fe to Ni@C enhanced the selectivity towards hydrocinnamaldehyde (HCAL), with NiFe0.7@C showing the highest selectivity (~88.6%) but at a reduced conversion rate. The carbon layer played a pivotal role in the stability and reusability of the catalysts. NiFe0.7@C maintained consistent performance over multiple reaction cycles, while NiFe0.7NPs (without a carbon layer) exhibited significant deactivation. Both catalysts displayed strong magnetism, facilitating easy separation from the reaction mixture. This study sheds light on the significance of the carbon layer in bimetallic catalysts and provides valuable insights for designing efficient catalysts for hydrogenation processes.Keywords:cinnamaldehyde hydrogenation;bimetallic catalysts;carbon−coated nanoparticles;Ni−Fe alloy;catalyst reusability
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Polymer Chemistry
·
2014
·Vol. 5
·期 17
·4984-4992
·
IF 5.368
Zhenguo Wang,Jie Zhao,Ying Li,Qiang Peng
A low band-gap copolymer, PDTS-FID, containing alternating dithienosilole (DTS) donor blocks and fluorinated isoindigo (FID) units, and its non-fluorinated counterpart, PDTS-ID, have been synthesized and characterized for photovoltaic applications. Compared to PDTS-ID, its fluorinated counterpart, PDTS-FID, exhibits broader and stronger absorption, lower-lying HOMO and LUMO energy levels, and higher hole mobility, resulting in an improved open-circuit voltage (Voc), short-circuit current density (Jsc), fill factor (FF) and power conversion efficiency (PCE). The positive effects were attributed to the fluorinated isoindigo block which favored a linear and planar conformation, giving rise to better backbone packing of the related copolymer, which was also confirmed by theoretical calculations (DFT). The conventional and inverted devices were fabricated and evaluated to explore the photovoltaic properties of the resulting copolymers. The best performance of 5.79% PCE was obtained from an inverted polymer solar cell (PSC) using PDTS-FID as the donor material, with a Voc of 0.84 V, a Jsc of 10.77 mA cm−2 and a FF of 0.64. These low band-gap copolymers could be expected to be promising donor materials for application in PSCs.
研究领域:
材料科学
·
有机光电材料
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2013
·Vol. 15
·期 44
·19422-19426
·
IF 3.829
Weiming Wu,Rui Lin,Lijuan Shen,Ruowen Liang,Rusheng Yuan,Ling Wu
CdS photocatalysts with tunable band gaps (2.17–2.32 eV) were successfully prepared by a solvothermal method. Photocatalytic hydrogenation of 4-nitroaniline over the obtained samples was evaluated in the presence of HCO2NH4 as a hole scavenger upon purging with N2 under visible light irradiation (λ ≥ 420 nm). The CdS sample prepared by CdCl2 and sulfur powder in ethylenediamine showed excellent catalytic activity, giving 100% of 4-nitroaniline conversion and 95% of p-phenylenediamine selectivity after 35 min of visible light irradiation. The results of electron spin resonance revealed that its photoexcited holes could efficiently react with HCO2− ions within HCO2NH4 molecules to produce ˙CO2− radicals with strong reductive abilities. Furthermore, photoexcited electrons of the obtained sample exhibited relatively strong reductive abilities as compared to other CdS samples. Therefore, this sample showed the highest catalytic activity among the CdS samples for the photocatalytic hydrogenation of 4-nitroaniline.
研究领域:
材料科学
·
环境科学
·
化学工程
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Small
·
2026
·
IF 11.8
Wanyun Huang,Xianghua Hu,Jiahao Li,Mengting Hu,Xiaoyun Qing,Qinpei Wang,Yunuo Niu,Xuhai Zhu,Yangbing Wen
Cellulose papers are sustainable alternatives to plastics but are often limited by poor water resistance and barrier properties. This study introduces a method to overcome these limitations by integrating softwood kraft lignin as a functional filler. Micronized lignin particles (4 µm) were produced via wet grinding and dispersed into a paper matrix at loadings up to 40%, followed by high-temperature pressing (160°C) to soften the lignin. This process created a composite with exceptional interfacial bonding between the softening lignin and cellulose fibers, yielding outstanding mechanical properties: a tensile strength of 82 MPa, a folding endurance of 891 cycles, and a density of 1 g/cm 3 . The barrier properties were also significantly enhanced, with water vapor and oxygen transmission rates reduced to 287 g/m 2 ·d and 114 cm 3 /m 2 ·d·0.1 MPa, respectively, representing decreases of 67% and 73% compared to conventional paperboard. This work establishes a viable paradigm for creating high-performance, fully biodegradable lignin-cellulose composites that bridge the functionality gap between paper and plastic, demonstrating immediate potential for sustainable packaging and covering applications.
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BIOSENSORS & BIOELECTRONICS
·
2026
·
IF 11.8
Ziheng Wang,Tianci Zhang,Hongyi Shao,Yixin Zhou,Yihao Chen,Xue Feng
Total knee arthroplasty (TKA) is one of the most effective treatments for end-stage knee osteoarthritis (∼1 million annual surgeries globally), where the biomechanical stability of the implanted prosthesis is crucial for lower limb mechanical axis alignment and postoperative normal gait. Most surgical failures and revisions are caused by intraoperative soft tissue imbalance. It heavily relies on surgeons' experience. Here, we present a wireless digital system featuring an ultrathin finger pulp-inspired flexible pressure sensor array, enabling balance monitoring in the clearance between the tibial component and polyethylene spacer, providing a specification-independent option. It addresses the inherent trade-off between body mass-level measurement range and minute force change detection during balancing. The bio-inspired sensor features fingerprint/mechanoreceptor-shaped trans-scale microstructures, achieving high linear sensitivity (0.016 N -1 /0.002 N -1 ), wide range (0-150 N per sensor and >440 N total), and fast response/recovery time (50/75 ms), with stability (>1000 cycles). Prosthetic bone validation demonstrates bilateral real-time quantitative force visualization across flexion angles (0°, 45°, 90°). Cadaveric validation with authentic bone mass and intraoperative force variations confirms clinical effectiveness and compatibility.
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Nature Communications
·
2026
·
IF 18.1
Wang Chang-ting,Lin Canjie,Xu Kai,Liu Yang,Lao Zhongtao,Cao Jianping,Liu Bei,Baqais Amal,Bin Bandar Khaled,Aldrees Saud,Alhussaini Mohammed A.,Leu Shao-Yuan,Ghaffour Noreddine,Gan Qiaoqiang,Wang Wenbin,Wang Peng
Downward solar evaporation with multistage configurations is a promising off-grid solution for high-efficiency potable water production. However, a major, yet often overlooked, barrier to practical application is the significant, unquantified performance gap between laboratory benchmarks and field operation, arising from the complex environmental factors. To diagnose this gap, this work first introduces the Environmental Robustness Index (ERI), the ratio of field-to-lab normalized water productivity ( P’ ), as an essential metric. A comprehensive framework is then developed to precisely quantify the effect of key environmental factors, including wind, sky cooling, and ambient temperature, on the ERI. Guided by the framework, we present the spectrally selective air lock strategy as a universal principle to suppress environmental heat losses and improve ERIs. Implementing this strategy significantly enhances downward solar evaporator’s ERIs from 0.55 to 0.98, effectively closing the gap. This study establishes a framework for solar evaporation to move beyond reporting P’ lab alone and utilize ( P’ lab , ERI) as the dual metrics for advancing real-world applicability.
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Cell Reports
·
2026
·Vol. 45
·期 10
·
IF 7.7
Juan Zhang,Mengjiao Lan,Hui Fu,Xucong Teng,Erwei Zhang,Xiran Peng,Chen Li,Bingjie Pan,Hang Yu,Yu Cai,Yan Yan,Yulan Jin,Zongyi Bo,Pumin Zhang,Ying Liu,Dongli Pan,Wei Wu,Jiyong Zhou
Many α-herpesviruses, such as herpes simplex virus type 1 (HSV-1) and pseudorabies virus, possess GC-rich genomes prone to forming G-quadruplex (G4) structures. However, the impact of these G4 structures on viral genome maintenance is unknown. Here, we demonstrate that G4s impede lagging strand DNA synthesis in the viral genome, generating single-stranded DNA (ssDNA) gaps that activate an ATR-mediated replication checkpoint. To complete genome duplication, these viruses co-opt host ssDNA gap prevention pathways, including PARP-mediated backup Okazaki fragment maturation and post-replicative gap-filling mechanisms, to resolve G4-induced ssDNA gaps. Pharmacological G4 stabilization, combined with inhibition of these pathways, synergistically inhibits viral replication. In terminally differentiated neurons, only gap-filling pathways are essential for virus replication, and disrupting them or stabilizing G4s robustly impairs HSV-1 reactivation in trigeminal ganglion explants. Collectively, our findings identify G4-induced ssDNA gaps as key barriers to α-herpesvirus replication and reactivation and highlight host ssDNA gap prevention pathways as promising therapeutic targets.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Qianqian Ding,Jisong Qian,Shijie Mei,Zebin Zhu,Wenge Yang,Kexin Huang,Yanqiang Cao,Liyong Jiang
Surface-enhanced Raman scattering (SERS) is a powerful analytical tool for detecting trace pollutants due to its molecular fingerprint specificity and single-molecule sensitivity. However, conventional two-dimensional gap-enhanced substrates suffer from limited analyte diffusion into nanogap caused by plasmonic material hydrophobicity. Herein, we present a V-shaped SERS substrate designed to overcome these challenges through three synergistic mechanisms: (i) three-dimensional (3D) plasmonic nanogaps, (ii) gravity-driven analyte enrichment enabling efficient aqueous-phase molecule transport, and (iii) light-trapping nanopores amplifying electromagnetic fields. By utilizing atomic layer deposition (ALD)-defined ultrathin alumina sacrificial layers, we achieved precisely tunable nanogaps (2–10 nm) between gold nanoparticles (AuNPs) and the underlying gold film (Au) within V-shaped architectures. The optimized 6 nm AuNPs-gap-Au nanostructure balances near-field intensity and aqueous analyte accessibility, achieving sub-nanomolar sensitivity for rhodamine 6G with outstanding reproducibility (RSD < 9 % across 10 −9 –10 −5 M). Significantly, the substrate enables multiplex detection of dye pollutants (basic blue 3, malachite green, methylene blue) at sub-nanomolar level in river water, showing great potential for real-time, on-site monitoring of emerging pollutants in natural water systems.
研究领域:
环境科学
·
纳米技术
·
分析化学
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Nanomaterials
·
2025
·Vol. 15
·期 21
·1661
·
IF 4.3
Bingqian Zu,Song Chen,Liping Bao,Yingjie Liu,Liang Wu
Phase and band gap engineering of (CdS)x(CuInS2)1−xnanomaterials is critical for their potential applications in photovoltaics and photocatalysis, yet it remains a challenge. Here, we report a precursor-mediated colloidal method for phase-control synthesis of alloyed (CdS)x(CuInS2)1−xnanocrystals with tunable band gap. When CuCl, InCl3, and Cd(AC)2·2H2O are used as the respective cation sources, wurtzite-structured alloyed (CdS)x(CuInS2)1−xnanocrystals can be synthesized with a tunable optical band gap ranging from 1.56 to 2.45 eV by directly controlling the molar ratio of the Cd precursor. Moreover, using Cu(S2CNEt2)2, In(S2CNEt2)3, and Cd(S2CNEt2)2as cation sources results in alloyed (CdS)x(CuInS2)1−xnanocrystals with a zinc-blende structure, demonstrating that the optical band gap of these nanocrystals can be compositionally tuned from 1.50 to 1.84 eV through precisely adjusting the molar ratio of Cd precursor. The results were validated through a comprehensive characterization approach employing XRD, TEM, HRTEM, STEM-EDS, XPS, UV-vis-NIR absorption spectroscopy, and Mott–Schottky analysis.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Xing Hu,Qiang Sun,Min Xiao,Bo Jin,Changgeng Sun,Zhiwu Liang,Hongxia Gao
Biphasic absorbents show promise for energy-efficient CO2 capture. This study evaluates 1-(2-aminoethyl)piperazine (AEP)/triethylene glycol dimethyl ether (TEGDME)/H2O systems with low volatility. To further enhance the cyclic CO2 capacity and decrease the viscosity of an absorbent and then reduce the energy consumption, four additives were incorporated. The optimal formulation of 10 wt %AEP/20 wt %DMEA/35 wt %TEGDME/35 wt %H2O achieved 82.5% regeneration efficiency and 1.04 mol/L cyclic CO2 capacity, which were 3.24 and 2.23 times higher than the non-additive baseline, respectively. Additionally, at 40 °C, the viscosity decreased from 60.5 to 12.4 mPa s. Compared with the 30 wt % MEA solution, the relative heat duty was reduced by 56% and 24% at 20 and 40 min, respectively. The molecular composition before and after phase separation was determined. Quantitative analysis using 13C NMR and LAMMPS simulations elucidated the phase separation mechanisms of the AEP/DMEA/TEGDME/H2O absorbent system.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Xiaopeng Wei,Jiaxing Qi,Yangchun Mo,Bitao Chen,Guoyuan Zheng,Shuyi Mo,Jilin Wang,Disheng Yao,Nan Tian,Fei Long
This paper reports two copper-based organic–inorganic hybrid perovskite single crystals, (2A5MP)2CuX4 (X = Cl, Br), synthesized by a halogen-regulated method. Through comprehensive characterization (single-crystal XRD, powder XRD, FTIR, Raman spectroscopy, TGA, and UV–vis DRS), we elucidated crystal structures, intermolecular forces, functional groups, bond configurations, optical properties, and thermal stability. Both compounds crystallized in the monoclinic space group C2/c. (2A5MP)2CuCl4 has an optical band gap of 2.47 eV and is stable up to 172 °C, while (2A5MP)2CuBr4 has a band gap of 1.66 eV with a stability of up to 185 °C. When Br– occupies the X site, (2A5MP)2CuBr4 exhibits an optical band gap (1.66 eV) close to the optimal value for solar cell absorbers. Furthermore, replacing Cl– with Br– enhances thermal stability by 13 °C. Therefore, (2A5MP)2CuBr4 demonstrates significant potential as a light-absorbing layer for solar cells.
研究领域:
材料科学
·
无机化学
·
光电子学
·
晶体工程
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yuhan Tao,Yi Dong,Jingjing Xu,Mindong Chen
Ion doping represents a viable strategy for improving the photocatalytic performance of semiconductor materials. This study successfully synthesized Sn 4+ -doped Bi 4 O 5 I 2 photocatalysts through an in-situ calcination approach. Structural characterization confirmed that Sn 4+ incorporation induced lattice contraction while increasing the density of active surface sites. Photocatalytic evaluation revealed that the 10 % Sn-BOI catalyst achieved 95.4 % levofloxacin (LOFX) degradation within 40 min under visible light irradiation, exhibiting a reaction rate constant (k) 5.2-fold greater than undoped Bi 4 O 5 I 2 . The catalyst demonstrated excellent stability, retaining high activity through four consecutive recycling tests. Mechanistic studies showed that oxygen vacancies (OVs) generated during doping modified the electronic structure by elevating the valence band maximum and narrowing the bandgap, while simultaneously promoting charge separation through electron trapping. These findings establish an effective methodology for developing photocatalysts to address antibiotic pollution in wastewater.
研究领域:
材料科学
·
环境科学
·
光催化
·
半导体掺杂
·
废水处理
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