BIORESOURCE TECHNOLOGY
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2025
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IF 9
Kuan Ding,Junheng Zhang,Deliang Xu,Jinfeng Hang,Félix Mérimée Bkangmo Kontchouo,Chanchana Thanachayanont,Thipjak Na Lampang,Zhaoyang Xu,Shu Zhang,Roger Ruan
Catalytic deoxygenation by ceria (CeO 2 ) represents an effective approach for upgrading bio-oil, yet the relationship between oxygen vacancies (O V ) of CeO 2 and catalytic ability remains controversial. To address this issue, three CeO 2 samples calcined in different atmospheres were adopted in catalytic deoxygenation of n -octanoic acid. Characterization results revealed that these CeO 2 exhibited identical crystal structure and different O V contents and surface acid-base properties. Catalytic tests demonstrated that O 2 -calcined CeO 2 primarily promoted ketone production at 400–600 °C while facilitated the formation of alkenes and aromatics at 600 °C. For the three CeO 2 catalysts, the highest O V content in H 2 -calcined CeO 2 endowed it with optimal acid-base pairs for enhancing both ketonization and aromatization reactions, thus achieving superior deoxygenation performance. Density functional theory calculations confirmed that O V significantly reduced the adsorption energy of active species during ketonization. This study provides evidence that surface O V of CeO 2 boost deoxygenation activity by optimizing acid-base pair sites.
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高影响因子
ADVANCED MATERIALS
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2025
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IF 26.8
Lingbin Ye,Yun Gao,Yifeng Feng,Xiaofang Zhu,Zichao Ma,Dingshuo Zhang,Yifan He,Haiping He,Zhizhen Ye,Xingliang Dai
Mixed-halide perovskite light-emitting diodes (PeLEDs) face the critical challenge of field-dependent phase separation. Discrete colloidal CsPbX 3 nanocrystals anchored with ligands are promising to suppress phase separation, yet it remains a mystery how ion migration proceeds when integrated into LEDs as emissive films. Specifically, the influence of ion migration inside a single nanocrystal or across the nanocrystals along the electric field on the performance of PeLEDs needs to be decoupled. Here, a low-temperature-assisted transfer-printing method is developed to construct a model PeLED containing a clear CsPbBr 3 -CsPbI 3 nanocrystal film interface for tracing the ion migration between perovskite nanocrystal films along the direction of electric fields. The comprehensive study demonstrates that halogen ions crossing the nanocrystal film interface lead to severe phase separation and poor device stability, rather than the horizontal intra-layer diffusion. The monolayer CsPbX 3 nanocrystal film prevents the field-dependent phase separation caused by interlayer ion migration, significantly improving electroluminescent stability, including spectrum and lifetime. The optimized structure achieves a high external quantum efficiency of 26.9% and a remarkably improved operational half-lifetime of 61.2 h at an initial luminance of 100 cd m −2 in pure-red PeLEDs based on mixed-halide CsPb(I x /Br 1-x ) 3 , more than 300 times longer than the control device using multilayer nanocrystals.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Doudou Ning,Zhaoqing Lu,Li Hua,Nan Li,Songfeng E
Covalent organic framework (COF) membranes have garnered widespread attention for applications in molecular sieving and water purification. How to fully leverage the advantages of COF materials while mitigating issues such as brittleness and interfacial defects remains a challenge. Herein, we develop a pore engineering strategy that integrates supramolecular confinement with chemical crosslinking. This approach enables the transformation of small 2D COF nanosheets into larger and thicker carboxymethyl-β-cyclodextrin (CM-β-CD) @COF nanosheets through chemical crosslinking, thereby enhancing their stacking density and reducing interfacial defects in the resulting laminar membranes. Additionally, the inner diameter of COF pores can be precisely matched with the outer cavity size of CM-β-CD, forming a “CM-β-CD-in-COF” hierarchical pore structure, which can further improve the selectivity of the separation membrane. Leveraging the synergistic role of size sieving and Donnan effect, the fabricated CM-β-CD@COF/aramid nanofibers (ANF) nanofiltration membranes demonstrate an ultrafast water permeability of 439 L·m ‒2 ·h ‒1 and the high rejection more than 97% for those dyes whose sizes exceed 1.0 nm. Moreover, the CM-β-CD@COF/ANF nanofiltration membranes also exhibit excellent durability, superior antifouling property, and strongly mechanical stability. This pore engineering strategy offers a novel pathway for tailoring the pore structure and dimensions of COFs to achieve precise mass separation.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Yu Cheng,Zhenning Yan,Liuyang Hu
The interactions of three berberine mid-chain fatty acid salts ([BBR][C n ], n = 6, 7, 8) with lysozyme (Lyz) are investigated in detail using multi-spectroscopic and molecular docking techniques. Steady-state fluorescence and UV–visible absorption experiments suggest that the binding mechanism of [BBR][C n ] on Lyz is a static quenching with a binding ratio of 1:1. The compound [BBR][C n ] exhibits a moderate binding affinity toward Lyz. The findings from UV–vis, synchronous fluorescence, three-dimensional fluorescence and FT-IR spectral measurements manifested the alternation in the secondary structure, microenvironment and conformation of Lyz by the binding of [BBR][C n ]. The α-helix content of Lyz declines, while the β-sheet content increases. The theory of Förster resonance energy transfer (FRET) was employed to measure the molecular distance between Lyz and [BBR][C n ]. Thermodynamic parameters and molecular docking results indicate that hydrophobic interaction, van der Waals force, and hydrogen bond are the primary driving forces during the binding process. The binding event enhances the esterase-like activity of Lyz. Furthermore, the binding affinity is influenced by environmental factors such as pH and temperature, as well as the anionic alkyl chain length of [BBR][C n ].
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高影响因子
DESALINATION
·
2025
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IF 9.8
Wuqi Cai,Dongpu Hu,Huying Li,He Wen,Yimeng Shi,Jing Wang,Ziwen Dai,Wenbo Yu,Sha Liang,Jiakuan Yang,Shushan Yuan
Membrane-based methods offer a promising alternative for phosphoric acid concentration, addressing the limitations of conventional techniques. In this study, we employ a pervaporation system to achieve phosphoric acid concentration, evaluating its efficiency and stability under industrial-relevant conditions. Composite PVA-COF membranes were successfully prepared through vacuum filtration of TpPa-SO 3 H nanosheets and PVA on hydrophilic polytetrafluoroethylene (PTFE) support membranes and the followed crosslinking with glutaraldehyde. The incorporation of PVA effectively eliminates boundary defects and enhances the mechanical and operational stability of the composite membrane. The optimum COF-PVA composite membrane exhibits excellent rejection of NaCl (99.9 %) and an ultrafast water flux of 268.6 kg m −2 h −1 . The water flux surpasses that of most reported membranes. Moreover, the membrane exhibited outstanding acid resistance and durability in phosphoric acid concentration tests, maintaining stable operation for 420 min at 40 °C with no phosphorus leakage detected in permeate. The membrane demonstrated notable concentration efficiency, achieving an increase in phosphoric acid concentration from 20 % to 25 % during a sustained 180-min operational period at 70 °C. This work helps to explore the prospects for the application of pervaporation membranes in the fields of seawater desalination and phosphorus chemical industry. Synopsis The hybrid membrane composed of poly (vinyl alcohol) and covalent organic framework, which is characterized by high permeate flux, salt rejection rate and acid stability.
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