Molecular Catalysis
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2025
·
IF 4.9
Rui Li,Lipeng Wang,Meilin Yin,Yangyang Lei,Shaokun Tang
CO 2 capture and utilization has received worldwide attention in view of the goals of sustainable development and carbon neutrality. Ionic liquid-functionalized covalent-organic frameworks (IL-COFs) possess high adsorption performance and catalytic activity, which overcome the drawbacks of cycling difficulty for pure ILs as homogeneous catalysts and deficient catalytic active sites for COFs. In this work, BpCOF is first rapidly synthesized by solvothermal-scCO 2 -assisted activation method. Afterwards, poly(ionic liquid)s and metal sites are introduced into BpCOF to obtain Zn-R-PIL-BpCOF (R = COOH, CH 3 ) materials through two-step modification including free radical polymerization and metallization. Then the CO 2 adsorption performance, catalytic activity for CO 2 cycloaddition with epichlorohydrin and catalytic recyclability of the materials are investigated. The excellent diffusion behavior of supercritical CO 2 and extremely low surface tension contribute to the rapid synthesis of highly crystalline BpCOF. The crystal structure and micromorphology of the materials are preserved after the two-step modification while the specific surface area and pore volume are decreased. The isosteric heat of adsorption of CO 2 for the typical sample Zn-COOH-PIL-BpCOF is higher than that of BpCOF, indicating the enhanced interaction with CO 2 by the integrated poly(ionic liquid)s and metal sites. Then Zn-COOH-PIL-BpCOF serves as catalyst and the yield of cyclic chloropropylene carbonate reaches 99.3 % at 90 °C and 2.0 MPa for 16 h under solvent-free and co-catalyst-free conditions. The carboxyl hydrogen-bond donors (HBDs), Zn 2+ Lewis acidic sites and Br − nucleophilic group in Zn-COOH-PIL-BpCOF play the roles synergistically. Zn-COOH-PIL-BpCOF exhibits excellent catalytic sustainability and reusability with the product yield exceeding 95 % after six cycles.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yingna Chang,Yuxiang Zuo,Jiawei Li,Jindi Wang,Kefan Song,Yu Liu,Rong Xing,Guoxin Zhang
Supportive atomic Zn electrocatalysts exhibit excellent stability for oxygen reduction reaction (ORR) due to their fully occupied d orbitals of Zn, but their catalytic activity is not satisfactory. Whereas heteroatom doping can anchor the Zn atoms to achieve higher Zn loading; and additionally serve as auxiliary sites to enhance the catalytic activity of Zn sites. Herein, we present a method for the synthesis of N, S co-doped carbon with highly dispersed Zn (named Zn-NSC). The ORR activity of the Zn-NSC catalysts is optimized by adjusting the pyrolysis temperature and the atomic structure of the dopant molecules. The optimized Zn-NSC demonstrates significantly enhanced ORR electrocatalytic activity, this is attributable to its highly co-doping of N and S heteroatoms that are adjacent to Zn atoms. Specifically, the Zn-NSC 3 catalyst exhibits remarkable ORR characteristics with excellent onset voltage (0.97 V vs RHE) and half-wave potential (0.87 V vs RHE), surpassing those of Pt/C (0.97 V and 0.85 V, respectively). Additionally, the Zn-NSC 3 can be utilized as efficient cathode for Al-air batteries, achieving a high power density of 119.4 mW cm −2 and satisfactory discharge stability. This work proposes an approach for synthesizing low-cost and efficient ORR electrocatalysts for Al-air battery applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jian Gao,Shu Wang,Yupu Liu,Denghui Yang,Xin Li,Fangzheng Yuan,Shuang Han,Wenlong Yang,Hui Zhang
It is of great significance and challenges to construct physical field-enhanced photocatalysts for energy and environmental applications. Herein, an artificial-photosynthesized CdS/PbTiO 3 S-scheme heterostructures with the enhancement of polarization electric field have been developed to promote the bifunctionally catalytic efficiencies for Cr(VI) photoreduction degradation of heavy metal pollution and Tetracycline (TC) photooxidation degradation of antibiotic. In our work, CdS nanoparticles are selectively grown on the positive polarization planes of PbTiO 3 microplates to form the same direction for both the ferroelectric polarization field of PbTiO 3 and the built-in electric field of S-scheme heterojunction. In this case, the stable heterostructures of PTO(00−1)/CdS(010) are obtained, and the greatly improved photocatalytic performances of redox degradation are achieved. The charge transfer mechanism and the synergetic effect between the spontaneous ferroelectric polarization and S-scheme heterojunction have been revealed by DFT calculations and experimental verifications. This interesting finding provides new insight into the design of efficient artificial-photosynthesized photocatalytic systems and we hope our work could serve as a valuable reference for our colleagues.
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POLYMER TESTING
·
2025
·
IF 6
Chang Yu,Yang Wang,Bo Jiang,Yang Yang,Jinxuan Han,Haibo Zhang,Yingshuang Shang
The rapid development in high-frequency communication has raised the demand for intrinsic low dielectric materials. Fluorinated poly(aryl ether)s (FPAEs) have gained significant attention due to their excellent dielectric properties and heat resistance. However, current methods for preparing FPAE films involve organic solvents, which generate substantial waste during large-scale production. There is an urgent need for simpler and more efficient processing methods, such as injection molding or melt processing, to overcome the limitations of solvent-based approaches. In this study, FPAEs with different molecular weights were synthesized from decafluorobiphenyl (DFBP) and bisphenol AF. The melting index and rheological tests demonstrated that FPAEs exhibited good thermal stability and melt processing performance. Notably, the dielectric loss (D f ) of FPAEs prepared by melt processing was significantly reduced (below 0.001) while their dielectric constant (D k ), mechanical strength, and flexibility remained comparable to those of FPAEs produced using solution processing. This study advances the melt processing of FPAEs with perfluorinated biphenyl groups, providing insights for large-scale production of low dielectric materials and broadening their potential applications in high-frequency communication.
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NANOTECHNOLOGY
·
2025
·Vol. 36
·期 13
·135402
·
IF 2.8
Yao He,Lijing Wang,Sheng Yang,Shaowei Zhang,Hongfang Du,Dandan Cui,Liangxu Lin
In lithium–sulfur batteries (LSBs), the dissolution of lithium polysulfides (LiPSs) triggers the shuttle effect to lose active materials irreversibly, leading to the fast deterioration of electrochemical performance. Rational designs on the separator membrane could mitigate the shuttle effect. However, the development of efficient separators economically remains a challenging task, aggressively limiting the commercial use of LSBs. This work reports the engineering of commercial molybdenum diselenides (MoSe2) flakes to mitigate the shuttle effect of LSBs, by forming rich Se vacancies via a potassium (K) intercalation and de-intercalation reaction. The Se vacancy in MoSex flakes significantly enhances the adsorption capacity of LiPSs and accelerates the Li+ diffusion kinetics, thereby alleviating the shuttle effect and enhancing the energy storage performance. This directly improves the energy storage performance of the LSBs by incorporating the MoSex flakes into the separator membrane, giving a high capacity retention rate of 94.6% at 2 C after 500 cycles, with a reversible specific capacity as high as 452 mAh g−1. This work offers a new strategy for the design and synthesis of vacancy rich transition metal chalcogenides for high-performance LSBs and beyond.
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PLoS One
·
2024
·Vol. 19
·期 4
·e0297677
·
IF 2.9
Liping Zhao,Ye Zhao,Lihe Zhao,Gang Liu
A nitrogen-phosphorus dual-doped porous spore carbon (NP-PSC) positive electrode matrix was prepared using native auricularia auricula as solid medium based on the principle of biomass rot. Yeast was introduce and cultured by the auricularia auricula solid medium. The freeze-drying and carbonization activation processes made the materials present a three-dimensional porous spore carbon aerogel properties. Yeast fermentation transformed auricularia auricula from blocky structure to porous structure and introduced nitrogen-phosphorus dual-doping. The physical and chemical properties of the prepared materials were characterized in detail. Electrochemical performance of NP-PSC in Li-S batteries was systematically investigated. Porous structure and heteroatom-doping improved the electrochemical performance, which is much superior to conventional activated carbon materials.
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CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Jiaoyang Hao,Lin Tan,Jiaqi Xu,Xiaowei Ma
Metal organic frameworks (MOFs) derived materials have attracted a lot of attention in the field of electromagnetic wave (EMW) absorption. In this regard, we improved the EMW absorption performance of Ni-based MOF derived materials by introducing sulfur and nitrogen dual-doped graphene (N,S-GS), which possesses good electrical conductivity. The minimum reflection loss (RL min ) of Ni/C/N,S-GS can reach −51.4 dB at 10.1 GHz when the absorber thickness is only 2.43 mm, with an effective absorption bandwidth (EAB) of 3.04 GHz. This work provides us with a novel strategy for the synthesis of composites with high-performance microwave absorption for practical applications.
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Small
·
2024
·
IF 13
Lei Zhang,Jianzha Zheng,Cong Liu,Yifei Xie,Hanyu Lu,Qinrong Luo,Yulong Liu,Huidong Yang,Kai Shen,Yaohua Mai
Antimony selenosulfide (Sb 2 (S,Se) 3 ) is an emerging quasi-1D photovoltaic semiconductor with exceptional photoelectric properties. The low-symmetry chain structure contains complex defects and makes it difficult to improve electrical properties via doping method. This article reports a doping strategy to enhance the efficiency of Sb 2 (S,Se) 3 solar cells by using alkali halide (CsI) as the hydrothermal reaction precursor. It is found that the Cs and I ions are effectively doped and atomically coordinate with Sb ions and S/Se ions. The CsI-doping Sb 2 (S,Se) 3 absorbers exhibit enhanced grain morphologies and reduced trap densities. The consequential CsI-doping Sb 2 (S,Se) 3 based solar cells demonstrate favorable band alignment, suppressed carrier recombination, and improved device performance. An efficiency as high as 10.05% under standard AM1.5 illumination irradiance is achieved. This precursor-based alkali halide doping strategy provides a useful guidance for high-efficiency antimony selenosulfide solar cells.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Qingtian Xu,Jierui Ye,Shuaibo Han,Yuebing Gao,Pan Chen,Siqun Wang,Qiang Wu,Qian Li
Renewable polymeric microcapsules hold promise for precisely controlled release of hydrophobic drugs (curcumin) in therapeutic treatment. However, there still remains challenges to stabilize the properties of microcapsules and to enhance encapsulation efficiencies of curcumin. By using an eco-friendly ternary deep eutectic solvent here, we successfully fabricated native cellulose nanofibrils, holocellulose nanofibrils, and lignocellulose nanofibrils containing both phytates and sulfate groups. In addition, a novel type of curcumin-loaded polymeric microcapsules with diameter of 10–20 μm were prepared by cellulose nanofibrils as stabilizing agents in Polylactide Pickering emulsion. The Pickering emulsions stabilized by P/N/S-containing cellulose nanofibrils, holocellulose nanofibrils, and lignocellulose nanofibrils are more stable than the unmodified cellulose nanofibrils-stabilized emulsion. The Pickering emulsion stabilized by 0.2 wt% P/N/S-containing lignocellulose nanofibrils exhibited the highest emulsion layer height and the zeta potential reached −39.74 ± 2.88 mV. Moreover, the highest encapsulation efficiency of curcumin can be up to 94.80%. Antimicrobial test revealed that curcumin in the polymeric microcapsules exhibited an excellent inhibitory effect on S. aureus and the antibacterial efficiency reached 98.66%. These results provided important information on the comparison of different cellulose nanofibrils-stabilized Pickering emulsions and the application of controlled release of curcumin incorporated polymeric microcapsules in drug delivery system.
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HIGH PERFORMANCE POLYMERS
·
2018
·
IF 1.047
Jun Tian,Qing Li,Liji Xiao,Zushun Xu,Changfeng Yi
A series of novel hyperbranched poly(urethane–imide)s (HBPUIs) was synthesized and derived from as-prepared imide-containing glycol and commercial materials via an A2 + B2 + B3 approach. The chemical and morphological structures of the resulting polymers were evaluated by infrared attenuated total reflection and X-ray diffraction techniques, respectively. Compared with pure HBPU, HBPUIs exhibited better thermal stability with the 10% weight loss temperature of 282–298°C under nitrogen atmosphere, good mechanical property with the tensile strength of 2–19 MPa, and elongation at breaks of 461–896%. Moreover, optical transmissivity of all films was measured and the results showed that they had excellent transparency in the scope of visible light. Meanwhile, the cutoff wavelengths of as-prepared HBPUI films were at around 350 nm, which can block the whole ultraviolet (UV)-C (200–280 nm) and UV-B (280–320 nm), as well as a part of UV-A (320–400 nm). Furthermore, the designed photocatalytic degradation experiment of the methylene blue (MB) confirmed that HBPUI films had good UV-shielding performance with 70% degradation of MB after intense UV irradiation (400 W) for 50 min under the protection of HBPUI film with 14% imide-containing glycol. This endowed HBPUIs with potential applications prospect in UV-shielding materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Huagen Liang,Haoran Wang,Anhu Wang,Ruolin Cheng,Shengyu Jing,Fu Chen,Palanisamy Kannan,Georgia Balkourani,Panagiotis Tsiakaras
Graphitic phase carbon nitride (g-C 3 N 5 ), as a novel n -type metal-free material, is employed as a visible light-receptive catalyst because of its narrow band gap and abundant nitrogen. To overcome the low carrier mobility efficiency of g-C 3 N 5 , its modification by K ions was adopted. In addition, In 2 S 3 was selected to couple with modified g-C 3 N 5 to overcome the recombination of photogenerated e − /h + . As a novel photocatalytic material, it was proven to possess a high visible light absorption capacity and a strong H 2 O 2 production ability (up to 3.89 mmol⋅L -1 in 2 h). Moreover, a S-scheme heterojunction structure was successfully constructed between the two materials, which was tested and confirmed to be successful in raising the photogenerated e − /h + separation efficiency. Ultimately, the primary processes of photocatalytic H 2 O 2 production were summarized by superoxide radical and rotating disc electron measurements. This research provides a fresh perspective for the synthesis of C 3 N 5 -based S-scheme heterojunction photocatalysts for producing H 2 O 2 .
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BIOMACROMOLECULES
·
2025
·
IF 5.4
Xiaoxiong Jin,Wanying Wang,Hui Liu,Jing Zhao,Pengfei Li,Aoting Li,Ziyuan Song
Poly(l-glutamic acid)s (PLGs) are promising bone-targeting ligands due to their high molecular weight and facile preparation. Nevertheless, the bone-targeting efficiency of PLGs is still relatively low, validating the necessity to further enhance targeting through structural optimization. Herein, we report the use of a heteropolypeptide strategy to improve the bone targeting of PLGs through the incorporation of another side-chain functionality for enhanced affinity with bone tissues. Specifically, the introduction of cationic amino or aromatic phenolic side-chain residues resulted in a ∼2.3-fold or ∼1.6-fold increase in the in vivo bone targeting, respectively. Cationic modification not only improved the affinity with bone minerals but also exhibited prolonged retention in the bone tissues for more than 60 days. This work highlights the use of a heteropolypeptide library to screen and optimize the performance of polypeptide materials, offering promising bone-targeting polymeric materials for the design of bone-related nanomedicine.
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