CATALYSIS LETTERS
·
2025
·Vol. 155
·期 11
·1-10
·
IF 2.4
Jiang Shengjie,Wang Qi,Sun Gonggang,Li Xinbao
Developing highly active and stable non-precious-metal electrocatalysts for the oxygen evolution reaction (OER) is essential for efficient green hydrogen production. However, monometallic catalysts exhibit poor stability and high overpotentials under high current densities. Therefore, the development of multi-metallic catalysts has become a focus of attention. Herein, we report a NiCoFeS/NF catalyst that exhibits higher OER activity in alkaline solution compare with commercial RuO 2 -based catalysts. The synthesized NiCoFeS/NF catalyst delivers a current density of 100 mA cm − 2 at a low overpotential of 280 mV and exhibits a Tafel slope of 49 mV dec − 1 , reflecting its favorable kinetics. Furthermore, the NiCoFeS/NF catalyst exhibited a long-term stability over 120 h, ensuring its potential for practical applications. Detailed characterizations revealed that sulfur incorporation not only creates additional active sites but also induces the self-unfolding of nanoparticles into nanosheets, thereby enlarging the electrochemically active surface area (ECSA). Graphical
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Surfaces and Interfaces
·
2025
·
IF 6.3
Weijie Yuan,Kanglong Zhang,Minghui Zhu,Jiamin Huang,Xue-Yang Ji,Dafeng Zhang,Junchang Liu,Xipeng Pu
The misuse of tetracycline (TC) poses a significant threat to the natural environment, necessitating the development of efficient methods for its degradation. Heterojunction photocatalysts have emerged as a promising approach for the degradation of such pollutants. This work aims to construct a novel NiWO 4 /Mn 0.3 Cd 0.7 S (NWO/MCS) S-scheme heterojunction using solvothermal coupled with mechanical mixing methods for efficient photocatalytic degradation of TC. The optimized NWO/MCS composite exhibited an 82% removal rate within 40 minutes under visible light irradiation, which represents an 18.4-fold and 1.13-fold improvement compared with pristine NWO and MCS, respectively. Various analytical methods and DFT calculations were utilized to characterize the structure and photophysical properties as well as prove the electron flow of the heterojunction, respectively. This work provides evidence of efficient charge carrier transfer between NWO and MCS within the S-scheme heterojunction, which contributes to the enhanced photocatalytic activity. The rational structural configuration of the S-scheme heterojunction has been shown to improve both the reduction and oxidation capabilities, offering a potential pathway for developing photocatalysts with high antibiotic removal efficiency.
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ACS Nano
·
2025
·
IF 16
Shicheng Liu,Xi Chen,Jing Xiang Ng,Xiong Liu,Qulan Zhou,Na Li,Shuzhou Li
To address the challenge of competitive H2O adsorption in photocatalytic CO2 reduction, localized hydrophobicity-modified S-scheme heterojunctions (WS/o-CN) were synthesized by combining WS2 and g-C3N4, which was modified by the addition of CTAB. Structural characterization and contact angle testing confirmed the formation of S-scheme heterojunctions and the specific structural role of CTAB. The optical, electrochemical properties, and gas adsorption capacity of the catalysts were analyzed, followed by in situ XPS and fs-TA tests to investigate the energy band structure and electron transfer paths. These results showed that localized hydrophobic modification reduces the surface proton concentration while maintaining efficient electron–hole separation in the S-scheme heterojunction. Testing the photocatalytic activity of WS/o-CN showed that the yield of CO reached 23.24 μmol g–1 h–1 with a high selectivity of 74.7%. Combined with molecular dynamics simulations and in situ DRIFTS tests, the results demonstrated that the introduction of the nonpolar long carbon chain CTAB effectively inhibits the adsorption of heterogeneous H2O on the catalyst surface while enhancing the maximum adsorption of CO2. The localized hydrophobicity reduces the proton concentration on the surface of g-C3N4, which in turn suppresses the absorption of photogenerated electrons by the HER reaction. This facilitates the efficient and selective conversion of CO2 to CO. This study highlights a surface engineering strategy that couples electronic structure optimization with interfacial wettability control, providing valuable insights into the design of selective and efficient photocatalysts for CO2-to-CO conversion.
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Zhangfa Yu,Panmin Yang,Chunxi Hai,Xuequn Li,Hongbo Sun,Yuan Zhou,Longgang Li,Xudong Yu,Wanghai He,Ying Zeng
Li 1.6 Mn 1.6 O 4 -type adsorbents show significant promise for lithium resource extraction from complex saline lakes due to their exceptional selectivity and high theoretical adsorption capacity of 72.3 mg g −1 . However, their practical application is markedly constrained by rapid manganese dissolution during elution with dilute HCl, primarily attributed to Jahn-Teller effect-induced Mn O structural distortion. To address this limitation, a synergistic S 2− /Na + co-doping strategy was employed: Na + stabilizes the spinel structure via Na O bond formation, while S 2− doping enhances charge density. In situ XRD analysis elucidated the structural evolution of the doped material. Experimental results demonstrate that H 1.6 Mn 1.6 O 4 modified with 1 % Na 2 S achieves an adsorption capacity of 39.6 mg g −1 in 300 ppm LiOH solution, with manganese dissolution loss below 2 %, and attains a single-pass lithium extraction efficiency of 99.5 % from oilfield brine containing 100 ppm Li + . Furthermore, the influence of Na + concentration on Li + adsorption selectivity was investigated for the first time, and the underlying mechanism was summarized. This finding is highly significant for efficient lithium extraction from various brines.
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POLYMER
·
2025
·
IF 4.5
Chunying Min,Yaxiang Su,Hang Yu,Hongyu Liang,Amna Siddique,Zhiwei Xu
Nowadays, degradable thermosets are confronted with a contradiction between their low performance and practical applications. In light of the weak covalent bonding of reversible bonds in biodegradable thermosetting resins, limits their applications in the field of tribology. Herein, we synthesize degradable poly(hexahydrotriazine)s (PHTs) by introducing trifluoromethyl (-CF 3 ) groups at different positions of the aromatic diamine main chains, achieving simultaneous improvement of degradability and high friction performance. The results showed that the fluorinated PHTs exhibited higher glass transition temperature (173.8 °C), tensile strength (61.8 MPa), and faster degradation rate (3 h) as compared to non-fluorinated polymer. Notably, fluorinated PHT resins exhibited excellent anti-wear performance with wear rates decreasing by 78.6 % owing to the large steric hindrance effect and strong electronegativity brought about by –CF 3 , which increases the rigidity and heat resistance of the PHTs molecules, thereby enabling it to effectively resist frictional heat generated during the friction process. Fluorinated PHTs revealed excellent wear resistance and degradation properties, which facilitates their practical application of energy conservation and protective metal anti-wear coatings in the tribological industry.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Yifan Yuan,Kunpeng Zhao,Qingyong Ren,Haotian Gao,Yuxiang Zhan,Tian-Ran Wei,Ting Zhang,Xun Shi
Flexible thermoelectric materials offer a promising route toward self-powered wearable electronics. The emergence of ductile inorganic semiconductors opens a new paradigm for flexible TE technologies, yet their thermoelectric performance remains far from optimal. Herein, we reveal a pronounced phase-transition hysteresis in the Ag 2 (S, Se, Te) system, where the transition temperature during cooling is 20–40 K lower than that during heating. Leveraging this hysteresis behavior, we successfully stabilize different structural phases at ambient conditions simply by varying the thermal treatment protocol. Compared to the monoclinic phase obtained by slow cooling from high temperature, the orthorhombic phase obtained by liquid-nitrogen treatment exhibits worse plastic deformation but much better electrical transport. A maximum power factor of ∼16 µW cm −1 K −2 and a zT of ∼0.5 near room temperature are achieved in the orthorhombic phase, both of which surpass most reported Ag-based ductile thermoelectric materials. This work provides a new pathway for designing high-performance ductile thermoelectrics.
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MATERIALS RESEARCH INNOVATIONS
·
2023
·
IF 0
Yiye Song,Jikai Zhang,Hongjun Yang
Poly(ester-ether)s are biodegradable copolymers with excellent performance. These copolymers are used as scaffolds for tissue engineering and degradable materials in packaging. However, their synthesis procedures are generally tedious which restrict their widespread applications. Furthermore, the inadequate availability of their commercial monomers also hampers their production. Herein, we reported a facile strategy for the synthesis of linear and branched poly(ester-ether)s using a polyol and methyl acrylate (MA) as monomers. During the polymerisation, the vinyl bond of MA reacts with the hydroxyl groups of a polyol following an oxa-Michael polyaddition mechanism. Simultaneously, esterification takes place between the ester group of MA and polyol. As a result, poly(ester-ether)s were successfully synthesised by combining these two different types of reactions into one polymerisation system. The linear and branched structures of the products were confirmed by the nuclear magnetic resonance and triple-detector gel permeation chromatography. This work provides a facile strategy for the synthesis of poly(ester-ether)s from commercially available monomers.
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SOLID STATE IONICS
·
2021
·
IF 3.785
Bo Fan,Zebo Guan,Hongjiao Wang,Lilin Wu,Wenzhi Li,Shibang Zhang,Bai Xue
Understanding the electrochemical processes in all-solid-state lithium‑sulfur batteries is essential for designing high-performance devices. Here, the evolution of the electrochemical impedance spectra of an all-solid-state lithium‑sulfur battery during one charge/discharge cycle was quantitatively investigated with a reasonably established equivalent circuit. The impedance spectra could be decomposed into several parts as follows: the bulk resistance of solid electrolyte and current collector at highest frequency, three semicircles from high to low frequency corresponding to the dynamic processes at different interfaces and a 45° straight line followed by an inclined small tail at low frequency. It is found that the middle frequency semicircle, corresponding to charge transfer at the cathode, varied obviously during the charge/discharge cycle. Moreover, the 45° straight line, which is attributed to the Li diffusion in the cathode material Li x S based on qualitative analysis, dominates the impedance spectra, revealing that the main kinetics-limiting factor is the Li diffusion in the active materials. Finally, an electrochemical model of the battery is proposed which provides insight for the designing of high-performance all-solid-state lithium‑sulfur batteries.
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MACROMOLECULES
·
2011
·
IF 4.838
Xiao A Zhang,Min Rui Chen,Hui Zhao,Yuan Gao,Qiang Wei,Shuang Zhang,Anjun Qin,Jing Zhi Sun,Ben Zhong Tang
Pentafluorophenyl (PFP) ester-functionalized poly(phenylacetylene)s (PPAs, P1, P2, and P3) were designed and synthesized in desirable yields and molecular weight by using organorhodium complexes as catalysts. Furthermore, these PFP-containing PPAs were used as precursors to prepare a series of mono- and dual-functionalized PPAs by the substitution of the activated ester moieties with functional amines. The structures of the PFP-containing PPAs and the derived functional PPAs were characterized by using multiple spectroscopic techniques including GPC, FTIR, 1H NMR, 13C NMR, and 19F NMR. The experimental details and the characterization data demonstrate that activated ester synthetic route to functional PPAs is facile (just stirring the precursor polymer with proper amine(s) at room temperature for hours), efficient (complete transition from ester to amide has been confirmed), and quantitative (the relative content of a specific functionality can be precisely preset by controlling the feed ratio of the functional amines). By reacting three PFP-containing PPAs with chiral amines or with chiral and nonchiral alkyl amines in a step-by-step way, a series of seven different PPAs with asymmetric carbon in the side chains were obtained. CD measurements indicated that the incorporation of chiral amine into polymer side chains induced helicity formation of P1 backbone. P1-C*Ph(L) and P1-C*Ph(D) backbones adopt predominantly right-handed and left-handed helical conformation, respectively. While the flexible spacer between the chiral center and the rigid PPA backbone blocked the induction of main-chain helicity by chiral pendants, thus no CD signals were recorded for P2-C*Ph(L) and P3-C*Ph(L). Substitution of PFP ester with amine-functionalized PEGs transited the hydrophobic PPAs to hydrophilic. All of the PEG-containing PPAs can be dissolved in water and form clear solutions. Meanwhile, all of the aqueous solutions exhibit LCST behavior and the hydrophilic PEG chains and hydrophobic alkyl spacers have positive and negative impact on the cloud point, respectively. Contact angles measurements showed that the length and content of the PEG chains contribute greatly to the hydrophilic property, and the length of the alkyl spacers and the content of the alkyl amine component played a contrary role. By controlling the ratio of the PEGylated and alkyl amines, the amphiphilic property of the PPAs can be well tailored.
研究领域:
高分子化学
·
材料科学
·
有机合成
·
手性与立体化学
·
智能聚合物
·
功能高分子
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Jingying Zhang,Yanchun Yang,Guonan Cui,H. Alata,Yiming Wang,Chengjun Zhu
Substitution of Zn 2+ ionic by Co 2+ ionic is known to suppress the cation disorder of Cu 2 ZnSn(S,Se) 4 thin films , which is helpful to obtain the excellent Cu 2 ZnSn(S,Se) 4 solar cell devices. In our work, the extra trace Co incorporation was added in the solution without affecting the compositions of other elements (i.e. Cu, Zn, and Sn) to enhance the electrical properties of Cu 2 ZnSn(S,Se) 4 thin films . And Co incorporation does not enter into the lattice nor be found in the selenized films after taking effect, but increases the crystallinity , compactness, carrier concentration, and electrical properties of Cu 2 ZnSn(S,Se) 4 thin films samples. By tuning the doping ratios of Co 2+ ionic, the surface roughness of the selenized films can be decreased from 110.2 nm (0 mol %) to 68.90 nm (5 mol %). As 1 mol % of Co 2+ ionic is doped, the carrier concentration of films can be also improved to 4.35 × 10 17 cm −3 from 2.63 × 10 16 cm −3 , and average surface current of films applied 1 V AC voltage can be increased from 2.426 nA to 4.454 nA. The enhanced properties of Co-incorporated films brings hope for the excellent performance of Cu 2 ZnSn(S,Se) 4 solar cells.
研究领域:
材料科学
·
光伏技术
·
半导体薄膜
·
可再生能源
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高影响因子
BIORESOURCE TECHNOLOGY
·
2026
·
IF 9
Xun Wang,Xiaolong Kong,Weisheng Wang,Ziwei Jing,Fei Wang,Zhiguo Wang,Xun Li
Optically pure linalool with (R)- and (S)-configurations is a pivotal chiral building block in the flavors and fragrances industry as well as in sustainable crop protection. However, current production of (R)- and (S)-linalool relies on plant extraction, which is severely restricted by the spatiotemporal differences in enantiomer distribution, leading to low yields and complex downstream separation processes. Herein, we developed a practical two-step batch resolution process based on the stereoselective linalool dehydratase-isomerase (LDI), isolated from Castellaniella defragrans strain 65Phen. Using the racemic linalool as substrate, (R)-linalool was obtained in the first batch, accompanied by the dehydration of (S)-linalool to β-myrcene. After fractional distillation, β-myrcene was stereoselectively hydrated back to (S)-linalool by LDI in the second batch. To overcome the thermodynamic constraints of enzymatic reactions and enhance the productivity, we further developed an in situ product removal strategy via selective adsorption using XAD-4 resin, which shifted the reaction equilibrium toward the formation of (S)-linalool and enhanced the hydration efficiency by 28.1-fold. Moreover, employing immobilized cells LDI@de-GA, we obtained 9.9 g of (R)-linalool with 98.0% enantiomeric excess (ee) value and 9.2 g of (S)-linalool with 97.3% ee from 20 g of racemic linalool, corresponding to a combined isolated yield of 95.5%. This work represents the first enzymatic resolution of linalool and establishes an environmentally friendly and sustainable approach for the synthesis of chiral linalool.
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高影响因子
MATERIALS SCIENCE AND TECHNOLOGY
·
2016
·
IF 1.008
D. Tan,Y. Liu,W. Guo,J. Wang,Z. Chang,D. Li
In the present work, W–Bi–S-tridoped TiO2 nanoparticles were synthesised by a simple sol–gel method. The structure and morphology of as-prepared W–Bi–S-tridoped TiO2 were characterised by using X-ray powder diffraction, transmission electron microscopy, scanning electron microscopy and UV–Vis diffuse reflectance spectrum. It was found that the W–Bi–S-tridoped TiO2 nanoparticles were well crystallised with a small size distribution. The absorption edge of TiO2 was extended into visible-light region obviously after being doped with W, Bi and S. The photocatalytic degradation of methylene blue was used as a probe reaction to evaluate the efficiency of W, Bi and S doping. The W–Bi–S-tridoped TiO2 exhibited the best photocatalytic activity, compared with TiO2, S-TiO2, W–S–TiO2 and Bi–S–TiO2. The mechanism that enhanced photocatalytic activity might be attributed to the synergistic effect of W, Bi and S.
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