Energy Materials
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2026
·Vol. 6
·期 3
·N
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IF 11.9
Jie Zhang\u003Csup\u003E1,\u003C\u002Fsup\u003E,Xiao-Lei Shi\u003Csup\u003E2,\u003C\u002Fsup\u003E,Li Zhang\u003Csup\u003E1,*\u003C\u002Fsup\u003E,Meng Li\u003Csup\u003E2\u003C\u002Fsup\u003E,Wenyi Chen\u003Csup\u003E2\u003C\u002Fsup\u003E,Jianfeng Zhu\u003Csup\u003E1\u003C\u002Fsup\u003E,Yanling Yang\u003Csup\u003E1,*\u003C\u002Fsup\u003E,Zhi-Gang Chen\u003Csup\u003E2,*\u003C\u002Fsup\u003E
p-Type Mg3Sb2 possesses strong thermoelectric potential, yet effective strategies to further enhance its performance remain underexplored. In this study, we investigated the p-type Zintl-phase compound Mg3Sb2 and proposed a Zn/Cu co-doping strategy to synergistically optimize carrier transport and lattice thermal conductivity. Mg3.1-xZnxSb2 (x = 0, 0.4, 0.6, and 0.8) and Mg2.3-yZn0.8CuySb2 (y = 0, 0.075, 0.100, and 0.125) series samples were prepared via high-energy ball milling followed by hot pressing. First-principles calculations reveal that substituting Mg sites with Zn and Cu induces pronounced band-structure modulation, shifting the Fermi level into the valence band and narrowing the bandgap. These effects collectively increase hole concentration and enhance electrical conductivity. Meanwhile, the mass fluctuation and local lattice distortion introduced by co-doping intensify phonon scattering, resulting in a substantial reduction in lattice thermal conductivity. Experimentally, Zn/Cu co-doping delivers a well-balanced optimization of thermoelectric transport properties. The Mg2.2Zn0.8Cu0.1Sb2 sample achieves a power factor of 351.99 μW cm-1 K-2 and a peak figure of merit (ZT) of 0.42 at 735 K, corresponding to a 147% improvement compared with the undoped sample. This work elucidates the synergistic effects of Zn/Cu co-doping in electronic band engineering and phonon modulation, offering a promising strategy for the rational design of high-performance p-type Mg3Sb2 and other Zintl-phase thermoelectric materials.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xinyu Wang,Rui Yang,Peng Lu,Jiabao Wang,Chunhua Lu,Kai Guo,Ning Zhu,Xin Hu
To meet the growing requirement for highly integrated electronic systems, nanocomposites comprised high dielectric constant ( ε ) ceramic nanofillers and large dielectric breakdown strength ( E b ) polymer has been widely investigated for high energy density capacitor. However, the poor interfacial compatibility arising from the great difference of surface energies and ε values usually resulted to the sacrifice of the dielectric properties and thus the capacitive performance. In this work, a series of core-shell structured barium titanate (BaTiO 3 ) nanofillers were designed and prepared to address this challenge via surface-initiated atom transfer radical polymerization (SI-ATRP) of methyl methacrylate (MMA), ethyl methacrylate (EMA) and glycidyl methacrylate (GMA). BaTiO 3 @PMMA (BT@M), BaTiO 3 @PEMA (BT@E), BaTiO 3 @PGMA (BT@G) were fabricated and incorporated into poly (vinylidene fluoride- co -hexafluoropropylene) (P(VDF-HFP), PVH), respectively. Enhanced dielectric properties, E b , and energy storage density were observed in these nanocomposites comparing with nanocomposites of BT/PVH. It should be ascribed to the polymer shell layer alleviated the great surface energy and ε value disparity between BT filler and PVH matrix, which was responsible for the enhancement of the interfacial compatibility and homogenous distribution of electric fields. Among these three types of nanocomposites, PVH/BT@G exhibited superior dielectric properties and capacitive performance. Extraordinary advances in charge carrier suppression at elevating temperature and electric field were also witnessed in PVH/BT@G. It should be attributed to the polar PGMA layer served as the deep traps, which block the charge motion in the filler-matrix interfaces. At optimal conditions, energy density of 10.61 J cm −3 and efficiency of 65.7 % at 360 MV m −1 was achieved. This work may provide insight into the rational design of the shell layer of the fillers for polymer nanocomposites dielectrics.
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JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Renjie Xu,Ganbing Yao
Equilibrium solubility of fenoxaprop-p-ethyl in aqueous mixtures of ethanol/ isopropanol/acetonitrile/ N,N -dimethylformamide (DMF) plus water was experimentally measured by isothermal saturation method at (278.15–323.15) K under 101.2 kPa. The order of solubility (mole fraction) of fenoxaprop-p-ethyl in pure solvents from high to low is 4.233 × 10 −2 (DMF 323.15 K) > 2.044 × 10 −2 (acetonitrile 323.15 K) > 7.727 × 10 −3 (isopropanol 323.15 K) > 5.338 × 10 −3 (ethanol 323.15 K) > 2.565 × 10 −5 (water 323.15 K). Experimental results showed that temperature and type of solvent were decisive factors for the dissolution of fenoxaprop-p-ethyl. The content of fenoxaprop-p-ethyl in solution was analyzed by high-performance liquid chromatography (HPLC). Moreover, the solubility data of fenoxaprop-p-ethyl was correlated by Jouyban-Acree (J-A) model, van’t Hoff-Jouyban-Acree (V-J-A) model and Apelblat-Jouyban-Acree (A-J-A) model. The maximum of root-mean-square deviation ( RMSD ), relative average deviation ( RAD ) and standard deviation ( SD ) predicted via three thermodynamic models were 1.78 × 10 −4 (DMF + water), 2.87 × 10 −2 (acetonitrile + water) and 1.79 × 10 −4 (DMF + water), respectively. In addition, the solvent effect between solute and solvent molecules was deduced by KAT-LSER model and the result showed that dipolarity/polarizability interactions between the solute and solvent molecules were dominant in the dissolution of fenoxaprop-p-ethyl. Finally, the preferential solvation parameter ( δx 1,3 ) of fenoxaprop-p-ethyl was obtained by the method of inverse Kirkwood–Buff integrals and the preferential dissolution behavior of each concentration range is explained by Lewis acid base theory. However, for acetonitrile + water, the change of δx 1,3 may be due to the polarization effects and it is not suitable for Lewis acid base theory.
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INDUSTRIAL CROPS AND PRODUCTS
·
2026
·
IF 6.4
Feng Gu,Guoqing Xiao,Caoxing Huang,Jian Li,Wangxia Wang,Yongcan Jin
A three-stage p -toluenesulfonic acid ( p -TsOH) fractionation protocol integrated with flow-through (F-T) quenching was developed for the efficient valorization of wheat straw ( Triticum aestivum L.), enabling simultaneous recovery of β -O-4-rich lignin, xylose, and lignin-containing cellulose nanocrystals (LCNC). In the first stage, response surface methodology (RSM)-optimized dilute p -TsOH treatment (5.6 wt%, 73.5 °C, 121.7 min) yielded 64.9% of the theoretical xylose as a solid powder. The second stage employed concentrated p -TsOH treatment (70 wt%, 80 °C, 3 mL/min) with F-T quenching for 10 min, achieving 77.6% delignification. Notably, 56.4% of the original lignin was recovered with 46.4% β -O-4 linkage retention and low degree of condensation. The third stage utilized recycled p -TsOH to hydrolyze the cellulose-rich residue (70 wt%, 80 °C, 60 min), thereby affording 31.7% LCNC with UV-blocking properties. This integrated process combines single-solvent recycling with reduced residence time and enables efficient fractionation and valorization of all major lignocellulosic components, offering a scalable biorefinery route with significant industrial potential.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 4
·318
·
IF 3.2
Su Xiuyuan,Chen Yuan-Bin,Tang Ruxuan
Based on the Na 0.48 La 0.52 MoO 4 ceramic, this study replaced La 3+ ions with Nd 3+ ions through ion substitution, which significantly increased the Q × f of Na 0.48 La 0.52 MoO 4 and reduced the sintering temperature. The good sintering state of this series of ceramics was demonstrated by scanning electron microscopy (SEM) and density tests. X-ray diffraction (XRD) and Raman spectroscopy results revealed the formation of solid solutions without the presence of secondary phases or impurities. The P–V–L theory indicated that the Na/La/Nd–O bond-to-bond ionicity (fi) contribution was dominant, while the Mo–O bond also played a significant role in the lattice energy ( U ), bond energy ( E ), and thermal expansion coefficient ( α ). Among them, the Na 0.48 La 0.48 Nd 0.04 MoO 4 ceramic achieved the best dielectric performance at 900 °C, with ɛ r = 11.027 ± 0.018, Q × f = 113,805 ± 6,358 GHz, and τ f = − 23.36 ppm/℃. Through ion substitution, these materials all have low sintering temperatures and high Q × f values, making them ideal candidates for low-temperature co-fired ceramics (LTCC).
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Journal of Energy Storage
·
2022
·
IF 8.907
Changhai Li,Guohua Jiang,Muslum Demir,Yanfang Sun,Rui Wang,Tianqi Liu
In this study, reduced graphene oxide/MXene-based composite electrodes combined with Fe 2 O 3 and NiCo-P as the negative and positive electrodes are prepared by a facile in-situ solvothermal route. Both rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P have an interconnected nanostructure with the specific surface areas at 17.1 and 131.9 m 2 ·g −1 . The specific capacitance of the as-prepared rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P composite electrodes are 248.13 and 214.66 mAh·g −1 under current density at 1 A·g −1 . An asymmetric supercapacitor (ASC) is further assembled using rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P as the negative and positive electrodes, respectively. The maximum energy density of the assembled ASC is 29.46 Wh·kg −1 at a power density of 700.34 W·kg −1 . After 10,000 cycles, 70.87 % of the capacity can be retained. These results demonstrate the potential application of composite electrode materials for supercapacitors .
研究领域:
材料科学
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储能
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纳米技术
·
电化学
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhen Wang,Ying Fang,Ying Yang,Bo Qiu,Haipu Li
A rational design of high-performance catalysts with peroxymonosulfate (PMS) activation and arsenic adsorption capacities for the removal of p -arsanilic acid ( p -ASA) is in high demand but remains a significant challenge. Herein, vacancies-rich metal–organic frameworks (MOFs) were constructed by room-temperature co-precipitation procedure, and the magnetic CoFe encapsulated in N -doped carbon nanotubes (CoFe- N -CNTs) were prepared using MOFs template by an annealing process under a nitrogen atmosphere. The synthesis conditions of CoFe- N -CNTs were optimized by tuning Fe/Co ratio and carbonization temperature. The CoFe- N -CNTs/PMS system showed favorable removal performance, achieving complete degradation of 46 μM p -ASA within 3 min and a total arsenic removal efficiency of 98% within 30 min at 0.1 g/L catalyst and 400 μM PMS. The degradation rate ( k obs ) and total arsenic removal efficiency towards p -ASA by CoFe- N -CNTs/PMS system were 6.7 and 2.7 times of those in the MOFs without vacancies-derived catalyst/PMS system, respectively. CoFe- N -CNTs/PMS system exhibited robust and efficient performance over a broad range of pH (4.5–9.0) and in different water matrices. Scavenging experiments and electron paramagnetic resonance (EPR) results demonstrated that non-radical singlet oxygen ( 1 O 2 ), sulfate radicals (SO 4 − ), hydroxyl radicals ( OH), and superoxide (O 2 − ) were involved in p -ASA decomposition. Electron transfer and direct oxidative transfer process (DOTP) also contributed to p -ASA degradation. High-performance liquid chromatography coupled with inductively coupled plasma mass spectrometry (HPLC-ICP-MS) analysis indicated that the arsenic moiety was cleaved from p -ASA in the form of As(III) and then rapidly oxidized to As(V). X-ray photoelectron spectroscopy (XPS) analysis indicated the removal of inorganic arsenic followed the mechanism of the inner-sphere complex. This study highlights the in-situ synthesis of CoFe- N -CNTs with outstanding activities for catalytic degradation and arsenic removal of organoarsenicals.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiahao Ren,Siqi Huo,Guobo Huang,Tianle Wang,Jiabing Feng,Wei Chen,Shenwei Xiao,Pingan Song
The ubiquitous application of highly flammable acrylonitrile–butadienestyrene (ABS) resin has brought great fire threat to human and environment. Unfortunately, current flame retardants often improve flame retardancy but reduce mechanical and thermal properties, seriously affecting their practical application. We herein reported novel multifunctional, high-efficiency, phosphorus and nickel co-doped graphitic carbon nitride (Ni-P-C 3 N 4 ) nanoflakes to address the trade-off between flame retardancy and mechanical/thermal properties. The addition of 2.0wt% of Ni-P-C 3 N 4 increased the initial degradation temperature and tensile strength of ABS composite (ABS/Ni-P-CN2) by 15 °C and 24.3% relative to virgin ABS, indicating its positive effect on thermal and mechanical properties. Compared with ABS, ABS/Ni-P-CN2 exhibited a notable increase in time to ignition, along with 32.4% and 33.8% reductions in peak heat release rate (PHRR) and peak smoke production rate (PSPR), demonstrating excellent anti-ignition, flame-retardant and smoke-suppressive performances. The increased fire safety was mainly due to the physical barrier effect of g-C 3 N 4 nanosheets and the catalytic charring effect of P and Ni. This work offers a novel design strategy to create multifunctional flame retardants for fabricating fire-safe polymer composites with superior thermal and mechanical properties, holding great potential in industries.
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POLYMER INTERNATIONAL
·
2023
·Vol. 72
·期 5
·520-531
·
IF 3.2
Yaqing Wen,Chunshan Lu,Guofei Chen,Xingzhong Fang
Two series of poly(ester-amide-imide)s (PEsAIs) with simultaneously bulky side groups, ester and amide bonds were synthesized by copolymerization of tert -butylhydroquinone bis(trimellitate anhydride), p -phthaloyl chloride and other monomers. These PEsAIs had glass transition temperatures ( T g s) in the range of 231–301 °C, coefficients of thermal expansion (CTEs) of 17–59 ppm K −1 and displayed good mechanical properties with tensile modulus of 2.6–4.5 GPa, tensile strengths of 63–143 MPa and elongations at break of 3.0%–11.7%. All films had good transparency with transmittances at 400 nm ( T 400nm ) of 43%–80%. The introduction of p -phthaloyl chloride successfully improved the properties of the polymer with higher transmittance, higher T g and lower CTE. In particular, PEsAI-b-60 presented the best comprehensive performance with a moderate T g of 301 °C, low CTE of 17 ppm K −1 and high transmittance ( T 400nm ) of 75%. © 2023 Society of Industrial Chemistry.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Fangmin Wu,Jun Nan,Tianzuo Wang,Zhencheng Ge,Bohan Liu,Meng Chen,Xuesong Ye
The activity and selectivity of the cathode towards electrosynthesis of H 2 O 2 are critical for electro-Fenton process. Herein, nickel-foam modified with N, O co-doped graphite nanosheets (NO-GNSs/Ni-F) was developed as a cathode for highly efficient and selective electrosynthesis of H 2 O 2 . Expectedly, the accumulation of H 2 O 2 at pH= 3 reached 494.2 mg L −1 h −1 , with the selectivity toward H 2 O 2 generation reaching 93.0%. The synergistic effect of different oxygen-containing functional groups and N species on the performance and selectivity of H 2 O 2 electrosynthesis was investigated by density functional theory calculations, and the combination of epoxy and graphitic N (EP + N) was identified as the most favorable configuration with the lowest theoretical overpotential for H 2 O 2 generation. Moreover, NO-GNSs/Ni-F was applied in the electro-Fenton process for p-nitrophenol degradation, resulting in 100% removal within 15 min with the kinetic rate constant of 0.446 min −1 and 97.6% mineralization within 6 h. The efficient removal was mainly attributed to the generation of bulk ·OH. Furthermore, NO-GNSs/Ni-F exhibited excellent stability. This work provides a workable option for the enhancement of H 2 O 2 accumulation and the efficient degradation of pollutants in electro-Fenton system.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xuecheng Liu,Linjie Yan,Xiting Hu,Hongli Feng,Bingke Guo,Xia Ha,Hui Xu
A facile construction of B and P doped carbon nitride as a potential photo-catalyst for splitting water to generate hydrogen or oxygen and BPA removal under visible light. B and P doping are confirmed by a series of characterizations. As the symmetrical π-conjugated rings of g-C 3 N 4 could be destroyed by B and P doping to enhance the visible-light absorbance and n → π∗ electronic transition to provide a new pathway for the directional separation of photoexcited electrons to boost the photocatalytic activity. Significantly, the CN-BP catalyst demonstrates excellent H 2 and O 2 evolution rates of 4.0 mmol H2 h −1 g −1 and 0.3 mmol O2 h −1 g −1 under visible light, which is about ∼3.8 and 21.6 times higher than that of g-C 3 N 4 , respectively. Notably, without sacrificial agent , the CN-BP could remove BPA completely by oxidation to generate 30 μmol h −1 g −1 H 2 . Both DFT calculations and characteristic results reveal that B and P doped carbon nitride reduce band gap energy , improve light harvesting and separation rate of electron-holes carriers for upgrading the photocatalytic activity.
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Acta Biomaterialia
·
2022
·
IF 10.633
Ying Wang,Chuanjiang Jian,Yiqing Long,Xiaowen Xu,Yang Song,Zongning Yin
Pathological coagulation within an injured artery and the subsequent cardiovascular complications, such as stroke and heart attack, greatly threaten human life. Inspired by the biochemical features of acute arterial thrombosis, such as abundant activated platelets and hydrogen peroxide (H 2 O 2 ), we constructed platelet-targeted theranostic nanoparticles (CyBA/PFM NPs) with H 2 O 2 -triggered photoacoustic contrast enhancement and antithrombotic capabilities. CyBA/PFM NPs were designed to target platelet-rich clots via fucoidan segment within the carrier, which could be activated by H 2 O 2 to produce fluorescent “CyOH” molecules, thus turning on the photoacoustic signal. CyBA/PFM NPs showed obvious amplification of fluorescence following incubation with fresh clots, exhibiting efficient scavenging ability of intracellular reactive oxygen species (ROS). In a FeCl 3 -induced mouse model of carotid thrombosis, CyBA/PFM NPs significantly amplified the photoacoustic contrast in thrombogenic tissues, effectively eliminated ROS within the occlusion site, and suppressed the thrombus formation , accompanied by a normalization of the soluble CD40L level. Given their accurate imaging potential, potent antithrombotic activities and acceptable biosafety, CyBA/PFM NPs hold strong potential as nanoscale theranostics for H 2 O 2 -correlated cardiovascular diseases. Statement of significance In this study, we developed a platelet-targeted and H 2 O 2 -triggered nanosystem self-assembled from phenylboronated fucoidan/maltodextrin polymers and responsive near-infrared probes. The fucoidan segment within the carrier could facilitate the specific delivery of the therapeutic polymers and probes to the platelet-rich arterial thrombus. In a mouse model of FeCl 3 -induced arterial thrombosis, the system could be activated by H 2 O 2 to produce fluorescent “CyOH” molecules, thus turning on the photoacoustic signal and specifically imaging thrombosed tissues. Besides, CyBA/PFM NPs significantly effectively eliminated ROS within the occlusion site and suppressed the thrombus formation. Given their theranostic potential and acceptable biosafety, this system has great potential for H 2 O 2 -correlated cardiovascular diseases.
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