CELLULOSE
·
2017
·Vol. 24
·期 10
·4189-4203
·
IF 3.417
Zhang Xiuqiang,Zhang Jinlong,Dong Lili,Ren Suxia,Wu Qinglin,Lei Tingzhou
We report a series of thermoresponsive cellulose nanocrystals (CNCs) decorated with poly(poly(ethylene glycol) methylacrylate) copolymers (poly(PEGMA)- g -CNCs) synthesized by surface initiated-atom transfer radical polymerization (SI-ATRP). The chemical structures and surface morphologies were subsequently confirmed by FT-IR, XPS, and AFM measurements. With regard to thermally responsive behavior, poly(PEGMA)- g -CNCs show tunable lower critical solution temperature (LCST) values in the range of 34–66 °C by varying the feeding ratios of comonomers. The reversible morphological transformation from individual nano-rod structures to larger globule aggregates was further verified by AFM during the LCST transition. These functionalized CNCs have potential as smart film filters and biosensors.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yan Zhao,Luyi Yang,Yunxing Zuo,Zhibo Song,Fang Liu,Ke Li,Feng Pan
Employing conductive binders in silicon (Si) anode has been considered as a fundamental solution to the pulverization of Si particles. Therefore, it is still a great challenge to improve the charge transfer capability of the conductive binder. Herein, a copolymer (PFPQ-COONa) is synthesized, characterized, and electrochemically tested as conductive binder for Si anode. It is found that PFPQ-COONa exhibits not only excellent cycling stability, but also satisfactory rate performance with relatively high areal loading, which outperforms currently reported single-component conductive binders. The superior electrochemical performance can be attributed to the molecular-level contact between binder and Si particles and to the enhanced intrinsic conductivity of PFPQ-COONa at reductive potential. This method provides a fresh perspective to design and develop conductive binder for high-capacity battery anode.
研究领域:
材料科学
·
电化学
·
电池技术
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DOI
PubMed
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-12
·
IF 3.998
Bo Caiying,Shi Zhongyu,Hu Lihong,Pan Zheng,Hu Yun,Yang Xiaohui,Jia Puyou,Ren Xiaoli,Zhang Meng,Zhou Yonghong
A novel eco-friendly halogen-free cardanol-based flame retardant with P, Si, and N on the chain backbone (PSNCFR) was synthesized and incorporated into phenolic foams (PFs). PSNCFR was comprehensively investigated via Fourier transform infrared spectroscopy and nuclear magnetic resonance. PSNCFR endowed PFs with flame retardancy, contributed to generating a composite char defense against flames, and efficiently prevented smoking from PFs. PSNCFR introduction improved the flexural strength of the PFs to approximately 155% of that of pristine PF. PSNCFR-modified PFs displayed a high limiting oxygen index value of 41.9%. The results of cone calorimeter show that the mean heat release rate, mean effective heat of combustion, and total heat release of the PSNCFR-modified PFs reduced by 26.92%, 35.71%, and 31.25%, respectively. In particular, the total smoke production of the PSNCFR-modified PFs decreased by 64.55%, indicating excellent smoke inhibition. As for the mechanism, the condensation and gas phases during pyrolysis were responsible for the synergistic flame retardancy in the modified PFs. The findings demonstrate that PSNCFR can be used in PF preparation to overcome their drawbacks of internal brittleness and flammability.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 23
·12632-12642
·
IF 14.511
Liang Shu,Xin Zhang,Wei Li,Jing Gao,Hongliang Wang,Yu Huang,Yue-Yu-Shan Cheng,Qian Li,Lisha Liu,Jing-Feng Li
AgNbO3-based antiferroelectric films have attracted emerging attention in the field of dielectric energy storage and possess promising applications in photocatalysis and microwave devices. Unfortunately, it remains a challenge to fabricate pure-phase AgNbO3 films on Si substrates, precluding their further integration into electronic devices. Here, we, for the first time, report phase-pure AgNbO3 films on Pt/Ti/SiO2/Si substrates by a chemical solution deposition (CSD) method. A facile CSD route without using the hazardous pyridine additive is demonstrated to obtain a stable AgNbO3 precursor for spin-coating films. By comprehensively controlling the heat treatment conditions, secondary phases are eliminated in the deposited films. The phase transitions of the AgNbO3 films are also investigated, where intriguingly the room temperature phase is determined to be the antiferroelectric M2 phase, rather than the commonly reported M1 phase in bulk AgNbO3. Meanwhile, the relative dielectric permittivity surpasses 300 at room temperature and maintains at ∼400 with low dielectric loss (<0.05; measured at frequencies of 0.1–1 MHz) over a wide temperature range of 150–350 °C, within a 5% variation. This work provides an easy-to-implement process of AgNbO3 films which may attract scientific interests and potential applications.
研究领域:
材料科学
·
电子工程
·
能源存储
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qian Li,Tong Yu,Tangze Deng,Jie Zhang,Jinwei Chen,Gang Wang,Zongbo Shi,Runsheng Zhuo,Ruilin Wang
Surface hydroxyl modulation on S-1 enables the rational design of PtCu catalyst. • Surface OH modulates particle surface density and promotes PtCu interaction. • The optimal 0.5Pt2Cu/S-1–950 demonstrated an approving PDH activity. Propane dehydrogenation (PDH) is a promising approach for propylene production. However, Pt-based catalysts suffer from severe coke deposition and metal sintering at high temperature, thus leading to a rapid deactivation and low propylene yield. Herein, a surface hydroxyl (OH) strategy is developed to modulate the dispersion and configuration of PtCu active sites on silicalite-1 (S-1). The precise regulation of OH density effectively optimizes the particle density of PtCu species. The properly introduced surface OH provides suitable sites to anchor the PtCu active sites with an enhanced catalytic activity and stability. The optimal 0.5Pt2Cu/S-1–950 catalyst achieves an initial propane conversion of 63.4%, propylene space–time yield of 0.60 g g cat. -1 h −1 , and exceptional long-term stability. Moreover, the catalyst also exhibits low coke formation rate with a total coke content of only 1.5 wt% after 6 h of reaction, thereby avoiding the coverage of active sites. The surface Si-OH-modulation offers an effective strategy for constructing high-efficiency Pt-based catalysts with an improved durability for propane dehydrogenation. Download: Download high-res image (111KB) Download: Download full-size image
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产品关联
DOI
高影响因子
Small Methods
·
2026
·
IF 8.7
Xinlin Li,Jiaxing Liu,Junxin Wang,Xiaodan Mei,Junchun Li,Guoqing Tong,Hongbang Liu,Tao Lin
High spatial resolution and sensitivity are critical performance metrics for x-ray imaging systems. Traditional thick polycrystalline scintillators suffer from severe internal light scattering, which limits imaging resolution and low-dose detection capability. Here, we present a pixelated scintillation screen with a waveguide architecture based on a Si-SiO 2 array (SOA) template, in which crystalline Cs 5 Cu 3 Cl 6 I 2 , a low-dimensional perovskite-like halide, is used as the scintillation medium. The low-refractive-index SiO 2 layer enables total internal reflection (TIR) for vertical photon guidance, while the Si substrate provides both high x-ray transmittance and visible light absorption, effectively reducing optical crosstalk. Using a vacuum-assisted infiltration process, Cs 5 Cu 3 Cl 6 I 2 is infiltrated and recrystallized within the SOA channels, yielding a well-confined scintillator structure that suppresses lateral scattering and enhances vertical photon transport. Compared to conventional film-based scintillators, the SOA-based design exhibits markedly improved imaging performance, achieving a spatial resolution of 20.10 lp·mm −1 and a minimum detectable dose of 35 nGy·s −1 . In addition, the fabrication process is highly scalable, allowing flexible construction of scintillator arrays with tailored pixel sizes and layouts. This approach provides a promising strategy for next-generation x-ray imaging with simultaneously high resolution and low-dose sensitivity.
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产品关联
DOI
PubMed
高影响因子
Advanced Sustainable Systems
·
2026
·Vol. 10
·期 2
·e01682
·
IF 5.6
Handuo Fu,Ke Fang,Shenhui Ma,Lin Wang,Yuyu Bu
In theory, the utilization of a Z-scheme photogenerated carrier transport system has the potential to significantly enhance the photogenerated voltage for photoelectrochemical overall water splitting. However, thus far, there have been no previous reports on such phenomena with silicon-based semiconductor photoelectrodes. In this study, we fabricated an n-Si/Pt/Mo-doped BiVO 4 (Mo: BVO) sandwich-like film with an intermediate carrier transfer layer to prepare a silicon-based photoelectrode with an indirect Z-scheme system. Additionally, by leveraging the lattice distortion effect over Mo: BVO, we increased the fusion ability of the sandwich-like interface between different substances. For the first time, we achieved generation of anodic displacement current via negative voltage (−0.57 V (vs. RHE)), resulting in a photocurrent density of 1.56 mA/cm 2 and a photogenerated voltage five times higher than that of the n-Si/Mo: BVO structure. Through combining experimental approaches with theoretical calculations, it has been confirmed that this realization is attributed to the contribution of the transport process within the Z-scheme system in the n-Si photoelectrode. Furthermore, milliampere-level photocurrent under negative bias was observed for the first time on an n-Si photoelectrode, providing a novel approach for constructing silicon-based photoelectrodes for overall water splitting.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 47
·期 1
·118722
·
IF 6.3
Wanli Zhu,Ge Zhang,Wei Zhang,Wei Li,Binyu Wang,Congcong Cui,Conghui Guo,Guohui Pan,Jianxun Bao
The fabrication of complex-shaped diamond/SiC composites with high solid loadings remains a formidable challenge. This study introduces a gel-casting combined with silicon infiltration strategy that overcomes this hurdle through precise colloidal design and rheological control of aqueous diamond/SiC suspensions. The synergistic electrostatic stabilization yielded a zeta potential of −75 mV, enabling high-solid-loading (65 vol%) slurries with optimal casting behavior. The resulting composites exhibited excellent mechanical properties, with flexural strength and elastic modulus reaching 420.2 MPa and 578.6 GPa, respectively. These values corresponded to 84.5% and 34.0% enhancements over a reference reaction-bonded silicon carbide (RB-SiC) composite at identical overall solid loading. This leap is underpinned by a significant fracture mechanism transition to transgranular diamond cleavage, consistent with strong interfacial bonding. This work establishes a practical route for manufacturing high-performance diamond/SiC composites.
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DOI
高影响因子
Journal of Advanced Dielectrics
·
2018
·
IF 0
Hua Fang,Gaojian Qiu,Xusheng Wang,Yanxia Li,Xi Yao
A series of Sr 1 . 9 6 Sn 1 − x Si x O 4 :0.04Sm 3 + ( x = 0 , 0.1, 0.15, 0.2, 0.3, 0.4) were synthesized from solid-state reaction. The mechanoluminescence (ML) performance of Sr 1 . 9 6 SnO 4 :0.04Sm 3 + was greatly enhanced by partial Si 4 + substitution for Sn 4 + , and the sample of Sr 1 . 9 6 Sn 0 . 8 Si 0 . 2 O 4 :0.04Sm 3 + showed weaker afterglow and twice stronger ML intensity than that in Sr 1 . 9 6 SnO 4 :0.04Sm 3 + . The stress response of Sr 1 . 9 6 Sn 0 . 8 Si 0 . 2 O 4 :0.04Sm 3 + ranged from 250 to 1200 N, and its linearity was greatly restored. Particularly, it was very sensitive in the minimal stress response range. These properties of no load threshold for stress sensing and weak afterglow make Sr 1 . 9 6 Sn 0 . 8 Si 0 . 2 O 4 :0.04Sm 3 + superior to other excellent ML materials. The introduction of Si 4 + caused lattice distortion and promoted defect formation in the system. The trap level energy greatly increased and the trap depth changed, which enhanced the trap ability and therefore improved effectively the ML properties.
研究领域:
材料科学
·
光学
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DOI
Materials Research Express
·
2021
·Vol. 8
·期 2
·025008
·
IF 1.62
Feng Yang,Yulong Dai,Dehuai Peng,Kai Huang
As one of the most promising candidates for anode materials, Si-based electrodes can offer specific capacity an order of magnitude beyond that of conventional graphite. However, Si usually suffers from dramatic volume changes during cycling cause pulverization and capacity fade. The key to improving cycle life is to synthesize Si-based materials with suitable architectures and a rational design. Here, we developed an economical and efficient method to obtain porous Si nanoparticles from coal ash. The Si nanoparticles with several nanometers can significantly shorten ion/electron transportation paths and further avoid the cracking and pulverization induced by large volume changes, and the porous structure makes the penetration of electrolyte easier. After carbonization, the obtained porous Si nanoparticles@C exhibits excellent electrochemical performances, and the special capacity can stable at 750 mAh g−1 at 2.0 A g−1 after 200 cycles. When current density up to 6.0 A g−1, the reversible capacity is 565 mAh g−1. We believe this method will make it possible to facilitate the large-scale and low-cost production of porous Si nanoparticles, and contribute to the development of high-performance Si-based anode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 27
·6006-6016
·
IF 4.857
Shien Pei,Jianfeng Guo,Zhishun He,Liang-ai Huang,Tongzhou Lu,Junjie Gong,Haibo Shao,Jianming Wang
Graphical Sharing a shell : Porous Si-Cu 3 Si-Cu microsphere@C core–shell composites fabricated by an etching/electroless deposition and subsequent carbon coating show excellent lithium storage performance. Low-cost Si-based anode materials with excellent electrochemical lithium storage present attractive prospects for lithium-ion batteries (LIBs). Herein, porous Si-Cu 3 Si-Cu microsphere@C composites are designed and prepared by means of an etching/electroless deposition and subsequent carbon coating. The composites show a core–shell structure, with a porous Si/Cu microsphere core surrounded by the N-doped carbon shell. The Cu and Cu 3 Si nanoparticles are embedded inside porous silicon microspheres, forming the porous Si/Cu microsphere core. The microstructure and lithium storage performance of porous Si-Cu 3 Si-Cu microsphere@C composites can be effectively tuned by changing electroless deposition time. The Si-Cu 3 Si-Cu microsphere@C composite prepared with 12 min electroless deposition delivers a reversible capacity of 627 mAh g −1 after 200 cycles at 2 A g −1 , showing an enhanced lithium storage ability. The superior lithium storage performance of the Si-Cu 3 Si-Cu microsphere@C composite can be ascribed to the improved electronic conductivity, enhanced mechanical stability, and better buffering against the large volume change in the repeated lithiation/delithiation processes.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Energy Sources Part A-Recovery Utilization and Environmental Effects
·
2022
·
IF 2.902
Bage Alhamdu Nuhu,Humphrey Adun,Olusola Bamisile,Mustapha Mukhtar
In this study, Ti-Fe-Si composites were prepared by one step ball-milling method as anode materials for Li-ion batteries. The effects of ball-milling speed and time were studied by X-ray diffraction, electron microscopy, and 57Fe Mössbauer spectroscopy. Changes in the composition and microstructure of the composites were observed and related to the electrochemical performance. Increasing ball-milling speed led to the formation of FeSix alloys that reduced the specific capacity while increasing the ball-milling time improved the particle size morphology and homogeneity. Discharge/charge profiles for the first two cycles were carried out at 0.05C current rate (1C = 1260 mAh.g−1for Li3.75Si). The first discharge for Ti-Fe-Si showed a LixSi reaction plateau of 1100 mAh.g−1, which were reversible and yielded columbic efficiency (CE) 77% and 90% in the first and second cycles, respectively. This capacity plateau indicated the insertion of about 3.25 Li into silicon. For the composite containing an additional 10% carbon SP, the theoretical capacity was about 1130 mAh.g−1, the discharge curve showed that the first discharge plateau reaches 1030 mAh.g−1 corresponding to 3.5 Li with the first CE was about 85%, and 98% for the second cycle. The addition of carbon to Ti-Fe-Si-C played a key role in capacity retention. The best results were obtained for the composite Fe/Ti/Si (1:1:2) with 10 wt% of carbon, ball-milled at 500 rpm for 48 hours. The specific capacities were about 900 mAh.g−1 at C/5 and 700 mAh.g−1 at 1C (C = 1200 mAg−1) with a capacity retention of about 90% for 100 cycles.
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DOI
高影响因子
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