Materials Today Communications
·
2025
·
IF 4.5
Chengzhen Fu,Hailu Wang,Hongxing Zhan,Yuanbing Li,Shujing Li,Bo Yin
Reducing the Ca/Si molar ratio is critical for optimizing calcium silicate hydrate (C–S–H) materials and enabling the recycling of silicon-rich waste. However, achieving high-performance crystalline C–S–H at Ca/Si < 0.83 remains challenging. This study proposes and systematically investigates a dual-silicon-source strategy, employing both active and inert silicon sources to regulate hydrothermal synthesis. At Ca/Si = 0.6, experimental results demonstrate that increasing the active silicon source content from 0 % to 60 % enhances tobermorite crystallinity by 275 %, decreases thermal conductivity by 26 %, and improves compressive strength by 7.30 MPa. The optimal performance was obtained at a reactive silicon-to-calcium molar ratio of 1.0. These findings confirm that this strategy significantly enhances C–S–H crystallinity and material performance. Mechanistically, the higher reactivity of the active silicon source drives competitive calcium consumption, facilitating the formation of long-chain crystalline C–S–H. This approach demonstrates a scalable pathway for synthesizing high-performance C–S–H under low Ca/Si conditions, offering promising applications in optimizing C–S–H-based materials and the recycling of silicon-rich waste.
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 12
·e70119
·
IF 3.8
Shaobo Yang,Xian Liu,Chenxi Liang,Jiali Li,Yujie Ma,Sijie Kou,Juanli Deng,Bo Chen,Shangwu Fan
The study investigated the hydrothermal corrosion behavior of Y 2 O 3 -Al 2 O 3 -SiO 2 (YAS) and CaO-Y 2 O 3 -Al 2 O 3 -SiO 2 (CYAS) glass interlayers in SiC/SiC composite joints under simulated pressurized water reactor (PWR) conditions and evaluated their effects on mechanical performance. The corrosion rate of the YAS joint was ∼2.7 mg/(cm 2 ·day), primarily due to the rapid dissolution of SiO 2 , which triggered pitting corrosion and void formation. While the Y 2 Si 2 O 7 exhibited good stability, degradation of the glass network caused the hydrolysis of Al species, forming stable AlO(OH) corrosion products. These processes severely damaged the structural integrity, reducing shear strength to ∼6 ± 2 MPa after 15 days, making it unsuitable for application. In contrast, the CYAS joint showed superior corrosion resistance, with a corrosion rate of ∼0.16 mg/(cm 2 ·day), only 2.2% of the YAS joint. The CYAS joint maintained structural integrity and interface bonding. During corrosion, Y 2 Si 2 O 7 crystals formed, while a layer of corrosion intermediates covered and eventually transformed into AlO(OH) particles. After 25 days, shear strength remained at 26 ± 2 MPa, still satisfying service requirements. The hydrothermal corrosion mechanism of YAS-based glasses basically involved the breakdown of the glass network and formation of stable products, including Y 2 Si 2 O 7 and AlO(OH).
研究领域:
材料科学
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核工程
·
陶瓷与复合材料
·
腐蚀科学
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产品关联
DOI
高影响因子
Frontiers in Pharmacology
·
2022
·
IF 5.988
Li Hui-Yu,Sun Hui,Zhang Ai-Hua,He Lu-Wen,Qiu Shi,Xue Jun-Ru,Wu Fangfang,Wang Xi-Jun
Si-Miao-Yong-An-Tang (SMYAT) is a classic prescription for the treatment of thromboangiitis obliterans (TAO). However, the effect and mechanism are still unclear. This experiment aims to evaluate the therapeutic effect and mechanism of SMYAT on sodium laurate solution induced thromboangiitis obliterans model rats using urine metabolomics. The therapeutic effect of SMYAT was evaluated by histopathology, hemorheology and other indexes. The urine metabolomic method, principal component analysis (PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA) were used for clustering group and discriminant analysis to screen urine differential metabolic biomarkers, and explore new insight into pathophysiological mechanisms of SMYAT in the treatment of TAO. SMYAT has significant antithrombotic and anti-inflammatory effects, according to the results of urine metabolomic analysis, and regulate the metabolic profile of TAO rats, and its return profile is close to the state of control group. Through metabolomics technology, a total of 35 urine biomarkers of TAO model were characterized. Among them, SMYAT treatment can regulate 22 core biomarkers, such as normetanephrine and 4-pyridoxic acid. It is found that the therapeutic effect of SMYAT is closely related to the tyrosine metabolism, vitamin B6 metabolism and cysteine and methionine metabolism. It preliminarily explored the therapeutic mechanism of SMYAT, and provided a scientific basis for the application of SMYAT.
研究领域:
中药学
·
代谢组学
·
病理学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yun Guo,Hong-Yi Li,Shuo Shen,Jie Cheng,Jiang Diao,Bing Xie
Chromium sludge is a hazardous solid waste which cannot be effectively treated but only piled up and abandoned, causing serious environment pollution and resource wasting. This work proposes an effective novel process to separately recover all resources in chromium sludge via a sustainable way. The obtained acid solving liquid from chromium sludge is desiliconized by cationic flocculant (PCAM) to induce coprecipitation of polysilicate gel and PCAM , which mixture is calcinated to generate the product of white carbon black in purity of 94.35% with a recovery of 92.58%. After desiliconization, V in the solving liquid is selectively extracted by microemulsion (ME), which is recovered as V 2 O 5 in purity of 99.34% with a recovery of 95.53% by the subsequent procedure of stripping-precipitation-calcination. The Fe 3+ in raffinate is reduced to Fe 2+ cations by Na 2 SO 3 , and is then recovered by H 2 C 2 O 4 precipitation to generate the FeC 2 O 4 product in purity of 99.12% with a recovery of 98.25%. Cr 3+ cations in residual solution are recovered by alkaline precipitation and calcination to generate the Cr 2 O 3 product in purity of 98.25% with a recovery of 92.68%. This work provides fresh penetrations into the synchronous detoxification, resource recovery and value-added utilization of hazardous industrial solid wastes.
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
PubMed
高影响因子
ENERGY & FUELS
·
2018
·
IF 3.024
Shaobo Liu,Bo Zhang,Zhanqi Bai,Feifan Chen,Fang Xie,Jinbing Zhou,Yongkang Lu,Guangwu Miao,Jiamin Jin,Zekai Zhang
Cu2O-SiO2 composite aerogel-like adsorbents with different n(Si/Cu) were synthesized by a sol–gel method, followed by drying under atmospheric pressure, and characterized by BET, XRD, SEM, H2-TPR, XRF, and FTIR means. Their adsorption performance for thiophene and benzothiophene in model fuels was investigated with equilibrium and breakthrough adsorption experiments, respectively. The results showed that Cu2O-SiO2 composite aerogel-like adsorbents exhibited an excellent desulfurization performance based on π-complexation between Cu(I) and thiophenics. The n(Si/Cu) of Cu2O-SiO2 had an obvious effect on their physical properties and consequently desulfurization performance. The BET surface area, pore size, and pore volume decreased with the decrease of n(Si/Cu) (increase of Cu content). Only a part of Cu was incorporated into the materials. The more the Cu(I) and the higher the specific surface area, the larger the adsorption capacity was. Cu2O-SiO2-50 performed the best, and breakthrough adsorption capacities for benzothiophene and thiophene were 5.78 mg S/gads (0.90 mmol-S/mmol-Cu) and 4.76 mg S/gads (0.74 mmol-S/mmol-Cu), respectively. The adsorption data can be well fitted by both the Langmuir and Freundlich adsorption isotherms. The effect of competitive adsorption of olefins or aromatics on the desulfurization performance of adsorbents was obviously weaker compared with the result in the literature. The spent Cu2O-SiO2 adsorbents can be well regenerated by benzene–n-heptane washing. The breakthrough adsorption capacity of thiophene on the first regenerated Cu2O-SiO2-50 was 71% of that on fresh adsorbent.
研究领域:
材料科学
·
能源与燃料化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yuxin Zuo,Wenjie Wei,Yaran Wang,Shen Wang,Zhongjun Wang,Yu Shu,Zhiqi Liu
Linear low-density polyethylene (LLDPE) films have garnered significant attention. However, their poor thermal insulation properties and limited functionality severely restrict applications. This study prepared an LDH/LLDPE composite film (LD-1.5%K) with excellent optical properties and high-performance infrared insulation by blending γ-(methacryloyloxy) propyltrimethoxysilane (KH570) dry-modified layered double hydroxide (D200) with LLDPE. D200 exhibits a refractive index close to LLDPE. Its incorporation significantly reduces the average infrared transmittance of LLDPE films. Surface modification of D200 with KH570 promotes uniform blending with LLDPE. As a result, the LD-1.5%K film delivers outstanding optical properties (high visible light average transmittance of 90.8%, and low haze of 23.5%) The film also achieves low infrared average transmittance. This low infrared transmittance endows LD-1.5%K film with excellent heat retention (up to 4°C) and recyclable stability. Consequently, this approach promotes crop growth and offers good economic value. Applying LD-1.5%K in areas with strong ultraviolet radiation and cold climates is effective. It provides a promising solution for future cultivation in harsh environments.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 25
·8020-8028
·
IF 7.393
Minghao Yi,Xunjun Chen,Peter S. Shuttleworth,Lewen Tan,Yunqing Ruan,Yixin Xu,Jiefeng Zheng,Shufang Wu,Sen Hu,Simin Xie,Zhixing Guan,Guoqiang Yin,Yingde Cui
Transparent and easily fabricated films were obtained through the coupling of eugenol, a bio-sourced feedstock, and poly(methylhydrosiloxane), via the Piers–Rubinsztajn reaction and Pt-catalysed hydrosilylation. The precursor reagents are readily available and economical, and the reaction process used was mild and easily undertaken. Additionally, poly(methylhydrosiloxane), having an abundant source of pendant Si–H groups, can be cross-linked with eugenol at multiple juncture points, and thus the eugenol content in these films ranges from 13.12 to 45.42 wt%. It was found that as the eugenol content increased, the thermal stability of the films also improved, with T10% and Rw at 700 °C ranging from 350.1 to 584.3 °C and 46.41 to 86.63%, respectively, which is higher than other analogous biomass-derived polysiloxanes. Crucially, the prepared films also exhibited suitable optical properties, with a >90% transmittance within the 430–1100 nm region and near 100% absorbance in the UV region (<350 nm), verifying their potential applications as optical encapsulants. Aside from good light transmittance, the refractive index of the films increased from 1.44 to 1.52 (at 450 nm) with higher ratios of eugenol. This demonstrates their suitability for use as high-refractive index (>1.5) LED encapsulants and also in stacked multi-layer reflectors. In addition, to protect the encapsulated chips from moisture erosion, these films exhibit good water vapour barrier properties and water repellence.
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 SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 1
·250-258
·
IF 1.798
Chen Hedong,Hou Xianhua,Qu Lina,Qin Haiqing,Ru Qiang,Huang Yuan,Hu Shejun,Lam Kwok-ho
Si@carbon composites have been successfully prepared via spray drying and subsequent calcination using PSA microspheres, nano-silicon and natural graphite as raw materials. Nano-silicon with a 20–100 nm particle size is prepared by radio-frequency electromagnetic induction. Such small nano-silicon particles can effectively accommodate the volume expansion of the Si@carbon anode. Additionally, the unique core–shell structure of Si@carbon composites can effectively alleviate the agglomeration of nano-silicon particles. Electrochemical tests show that the Si/carbon electrode delivers a high initial discharge capacity of approximately 1404.27 mAh g −1 with an initial coulombic efficiency of 82.4 %. The discharge specific capacity remains as high as 73.6 % after 100 charging-discharging cycles, demonstrating the electrode material’s good cycle stability. In addition, the corresponding specific capacity of the Si@carbon composites electrode remains at around 1150 mAh g −1 at a current density of 1 A g −1 . And when the current density is 0.1 A g −1 , its specific capacity can still remain at around 920 mAh g −1 , indicating excellent capacity reversibility. Therefore, Si@carbon composites are superior anode materials for high-performance Li-ion batteries.
研究领域:
材料科学
·
电化学
·
储能
·
纳米技术
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DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 7
·期 4
·1084-1092
·
IF 6.813
Muhammad K. Majeed,Rashid Iqbal,Arshad Hussain,Mina Lotfi,M. Umar Majeed,M. Zeeshan Ashfaq,M. Sufyan Javed,Muhammad Ahmad,Adil Saleem
Through collective use of experimental investigation and theoretical approaches, i.e., X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, microscopic properties and density functional theory (DFT) calculations, we comprehensively characterize the structural, morphological, and lithium (Li) storage performance of double-shelled silicon@ZIF-8@ZIF-67 (Si@DNC). The unique architectures not only absorb the huge volume variation stress of Si during cycling but also provide enhanced electrical conductivity and manipulate the stability and integrity of a well-wrapped double-shelled framework. Additionally, N-doped carbon can also enhance the conductivity of electrodes. The superior Li storage performance in double-shelled structures is refined via an interactive lithiation/delithiation approach and validated using DFT calculations. Typically, the as-prepared Si@DNC delivered enhanced cycling stability with a high discharge capacity of 2537.8 mA h g−1 in the first cycle and 1285 mA h g−1 after 200 cycles at 200 mA g−1. Therefore, the double-shelled structure reflected outstanding electrochemical performance and is expected to be a forthcoming candidate for anode materials in next-generation lithium-ion batteries (LIBs).
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
计算材料学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yang Bai,Yanbiao Zhao,Weidong Li,Linghui Meng,Yongping Bai,Guorong Chen
Solid sulfide electrolyte has been researched for several years, and a high ionic conductivity has been acquired. However, it is difficult to apply in industrial manufacturing partly because the raw materials, such as SiS2, GeS2, P2S5, et al., have strict preparing conditions and are sensitive to water and oxygen in the air. Herein, we report a new method to produce solid sulfide electrolytes Li9.54Si1.74P1.44S11.7X0.3 (LSiPSX) (X = F, Cl, Br, I), that is, using elementary substances Si, P, and S as the starting raw materials, which not only is a promising way to ease the harsh storage conditions of the SiS2 and P2S5 as starting raw materials but also provides a feasible choice for the preparation of solid sulfide electrolyte. The conductivity of solid sulfide electrolyte is further adjusted by controlling the particle size of raw material silicon and the different halogen doping. As a result, the Li9.54Si1.74P1.44S11.7I0.3 releases the highest ionic conductivity of 1.35 mS/cm at room temperature and a wide electrochemical window up to 9 V versus Li/Li+ which is prepared from the 3 nm particle size Si and I doping. The all-solid-state lithium–sulfur battery (ASSLSB) is constructed with LSiPSI and with a good performance. Our study demonstrates the possibility of preparing the LGPS crystal type solid sulfide electrolytes by using elementary substances.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
无机非金属材料
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DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Yanfei Zeng,Yudai Huang,Niantao Liu,Xingchao Wang,Yue Zhang,Yong Guo,Hong-Hui Wu,Huixin Chen,Xincun Tang,Qiaobao Zhang
Dramatic capacity fading and poor rate performance are two main obstacles that severely hamper the widespread application of the Si anode owing to its large volume variation during cycling and low intrinsic electrical conductivity. To mitigate these issues, free-standing N-doped porous carbon nanofibers sheathed pumpkin-like Si/C composites (Si/C-ZIF-8/CNFs) are designed and synthesized by electrospinning and carbonization methods, which present greatly enhanced electrochemical properties for lithium-ion battery anodes. This particular structure alleviates the volume variation, promotes the formation of stable solid electrolyte interphase (SEI) film, and improves the electrical conductivity. As a result, the as-obtained free-standing Si/C-ZIF-8/CNFs electrode delivers a high reversible capacity of 945.5 mA h g −1 at 0.2 A g −1 with a capacity retention of 64% for 150 cycles, and exhibits a reversible capacity of 538.6 mA h g −1 at 0.5 A g −1 over 500 cycles. Moreover, the full cell composed of a free-standing Si/C-ZIF-8/CNFs anode and commercial LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) cathode shows a capacity of 63.4 mA h g −1 after 100 cycles at 0.2 C, which corresponds to a capacity retention of 60%. This rational design could provide a new path for the development of high-performance Si-based anodes.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Hedong Chen,Shaofeng Wang,Xiaojing Liu,Xianhua Hou,Fuming Chen,Hui Pan,Haiqing Qin,Kwok-ho Lam,Yingchun Xia,Guofu Zhou
The double-coated Si-based composite (nano-Si@carbon@void@graphene sheets) with the excellent electrochemical properties have been successfully designed and prepared via a spray drying method. The composite electrode at 0.1 A g −1 presents a high initial discharge/charge capacity of 2744.9/2389.8 mAh g −1 , representing high initial coloumbic efficiency of 87.1%. After 200 cycles, a high charge capacity of 1325.2 mAh g −1 is obtained. Even at 0.8 A g −1 and 1.6 A g −1 , the composite electrode still maintain high capacities of 1466.1 mAh g −1 and 561.5 mAh g −1 , respectively. The enhanced performance is mainly attributed to the double-coated structure with void space resulting from the carbon layer and wrinkled graphene sheets . The three-dimensional network structure from carbon shell and graphene is capable of improving the electrical conductivity of the composite, buffering the significant volume expansion due to the intercalation and deintercalation of lithium-ions on the Si-based electrode, providing accommodation space for the volume changes and diffusion paths for lithium-ions. Furthermore, the part amorphous structure derived from the nano-silicon exhibits a cushioning effect on the electrode structure during the discharge/charge process of lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）