Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Wang Guo,Lei Zhao,Ping Li,Enyu Wang,Yuanheng Pang,Yanting Wei,Bowen Li,Yanjian Huang,Bin Liu,Shan Wang,Hui You,Yu Long
In this study, we introduced a novel approach by using natural calcium phosphate-based ceramic whitlockite as the matrix, natural silicon-based ceramic wollastonite fiber as the secondary phase, and desktop-level DLP 3D printing as the fabrication method to develop an all-natural ceramic porous bone scaffold with excellent mechanical, degradable, biomineralization, and cell responses. The results demonstrated that, at a solid loading of 75 wt% and a sintering temperature of 1000 °C, the compressive strength of the whitlockite porous scaffold reached 20.0 MPa. With the incorporation of wollastonite fiber, the compressive strength of the composite ceramic scaffold further increased to 31.0 MPa, achieving a top-tier level for desktop-level DLP-printed porous ceramic bone scaffolds. This mechanical enhancement effect was mainly attributed to the grain refinement effect of WF on whitlockite and the fiber reinforcement effect of WF. Additionally, the degradation rate of the composite ceramic scaffold increased with higher WF content, attributed to the rapid degradation rate of WF and the microstructural changes in the whitlockite matrix induced by WF doping. Furthermore, the biomineralization capability and cellular response of the composite ceramic scaffold were enhanced with WF doping, due to the improved degradation ability promoting the release of calcium, phosphate, and silicon ions. This study further validates the applicability of desktop-level DLP for fabricating ceramic bone scaffolds and provides evidence of the potential of all-natural ceramic whitlockite/WF as bone scaffold materials.
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高影响因子
RENEWABLE ENERGY
·
2020
·
IF 6.274
Tongxin Qu,Shengli Niu,Zhiqiang Gong,Kuihua Han,Yongzheng Wang,Chunmei Lu
CaO is efficient in catalyzing transesterification for biodiesel production , but its industrial application is inherently restricted by active sites leaching. To address this drawback, CaO is decorated into wollastonite to prepare the stable Ca/wollastonite catalyst. Microwave-assisted transesterification is used to produce biodiesel from palm oil, which effectively accelerates the reaction rate and improves the conversion efficiency. The Ca/wollastonite-0.8 catalyst with the mass ratio of CaO to wollastonite of 0.8 performs well with the fatty acid methyl ester (FAME) yield of 97.59%. Also, this catalyst is highly stable, where the FAME yield of 87.30% could be obtained for the fifth reused cycle. CaO is evenly dispersed on the wollastonite surface and the total basicity is high to 0.281 mmol g −1 . Meanwhile, transesterification parameters are optimized by response surface methodology with central composite design (RSM-CCD) and the maximum FAME yield of 98.46% is achieved at reaction temperature of 64.2 °C, molar ratio of methanol to palm oil of 15.54 and mass ratio of catalyst to palm oil of 9.21 wt % for 3 h. Besides, the mass ratio of catalyst to palm oil is the primary variable. Wollastonite is demonstrated to be feasible to enhance the stability of CaO in catalyzing transesterification.
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高影响因子
JOURNAL OF POWER SOURCES
·
2023
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IF 9.2
Haoyu Wu,Shuofeng Jian,Shida Xue,Ziting Ma,Changgang Li,Shuolei Deng,Wenhao Feng,Yaowen Cao,Qianqian Dou,Luyi Yang,Yifan Dong
Solid polymer electrolytes suffer from relatively low Li + conductivity, poor mechanical strength and interfacial incompatibility with electrodes, which hinder their further application in solid-state batteries. In this work, one-dimension (1D) wollastonite fillers are introduced into the solid polymer electrolyte, which not only contribute to the improved mechanical strength and electrochemical window, but also effectively inhibit polymer crystallization. More importantly, the abundant Lewis sites at wollastonite surface provide 1D ion pathway to boost ion transport in the electrolyte, achieving high ionic conductivity and Li + transfer number. Owing to these favorable properties, the as-prepared polymer electrolyte exhibits enhanced interfacial stability toward Li anode, enabling long-term cycling in a Li-Li symmetric cell without short circuit. Showing good interfacial compatibility with both LiFePO 4 and LiCoO 2 cathode materials , the modified polymer electrolyte delivers high rate capability (143 mAh g −1 at 5C) and stable cycling performance (capacity retention of 93.12% after 380 cycles) in full cells. Through regulating the interfacial interactions between polymer matrix and fillers, this work points out a new direction towards high-performance all-solid-state batteries.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liu Yunan,Fu Renli,Lu Ran,Shen Minhao,Hu Yunjia,Bei Guoping
Low Temperature Co-Fired Ceramic (LTCC) substrates used for microwave circuits typically must have low dielectric loss and low permittivity, as well as the ability to co-fire with metals. The dielectric properties of the microcrystalline glass materials used as the LTCC substrates are closely related to the crystallization process during sintering. This study focuses on the crystallization process of CaO-B 2 O 3 -SiO 2 microcrystalline glass. Wollastonite and pseudowollastonite seeds were used to control the degree of crystal precipitation. The phase composition and microstructure of each sample were analyzed in detail to elucidate the changes in the dielectric properties and sintering performance of the material. The addition of crystal seeds as nucleation sites promoted crystallization and led to the formation of quartz crystals. The sintered samples exhibited excellent dielectric properties: ε r < 4 at 18 GHz, tan δ < 0.0015, and Q × f > 12000 GHz. They have great potential as high-performance LTCC substrates.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Haoran Sun,Zijian Wang,Yulian Wang,Zining Guo,Gui Gao
Wollastonite and calcite were both calcium-containing phases possessing remarkably analogous surface physical-chemical characteristics. Conventional primary amine collectors exhibit poor selectivity between the two, making separation difficult. In this experiment, the quaternary ammonium salt octadecyltrimethylammonium chloride (STAC) was employed as a novel collector to achieve efficient separation of wollastonite and calcite. Flotation experiments on both single and mixed minerals demonstrated that efficient separation of wollastonite and calcite could be achieved under conditions of 20 mg/L STAC and pH 7.0. Zeta potential and contact angle measurements showed that, following interaction with STAC, the zeta potential and contact angle of wollastonite increased significantly; Fourier-transform infrared (FTIR) analysis revealed that, after adsorption of STAC onto wollastonite, new absorption peaks appeared at 2922.88 cm −1 and 2854.06 cm −1 , whilst no significant changes were observed in calcite; Field-emission scanning electron microscopy (FESEM) revealed that the collector STAC significantly altered the surface microtopography of wollastonite upon adsorption. Based on the data regarding the increase in nitrogen content, STAC appears to prefer adsorption onto the surface of wollastonite; XPS analysis revealed that after STAC treatment, the O1s binding energy shift on wollastonite was 1.10 eV, which is approximately 22 times the shift observed on calcite (0.05 eV), suggesting substantially stronger interaction between STAC and wollastonite; Finally, molecular dynamics simulations further elucidated that STAC undergoes oriented adsorption on the wollastonite surface via strong electrostatic anchoring, whereas only transient non-covalent interactions occur on calcite. In summary, STAC is a highly promising flotation collector capable of efficiently separating wollastonite from calcite.
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高影响因子
Applied Sciences-Basel
·
2023
·Vol. 13
·期 20
·11593
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IF 2.7
Bin Jiang,Xin Li,Bozhi Yang,Shujie Yang,Xinyi Chen,Junhong Chen,Minghao Fang,Zhaohui Huang,Xin Min,Xiaozhi Hu
The occurrence of fractures has emerged as one of the most prevalent injuries in the human body. In bone reconstruction surgery, after the implantation of porous hydroxyapatite materials, there is an initial infiltration of body fluids into the porous implant, followed by biomineralization-mediated apatite crystal formation and the subsequent ingrowth of bone cells. Despite extensive research efforts in this field, previous investigations have primarily focused on the formation of apatite crystals on exposed surfaces, with limited literature available regarding the formation of apatite crystals within the internal microstructures of bone implants. Herein, we demonstrate the occurrence of dynamic biomineralization within a three-dimensional porous hydroxyapatite/wollastonite (HA/WS) skeleton, leading to the abundant formation of nano-sized apatite crystals across diverse internal environments. Our findings reveal that these apatite nanocrystals demonstrate distinct rates of nucleation, packing densities, and crystal forms in comparison to those formed on the surface. Therefore, the objective of this study was to elucidate the temporal evolution of biomineralization processes by investigating the microstructures of nanocrystals on the internal surfaces of HA/WS three-dimensional porous materials at distinct stages of biomineralization and subsequently explore the biological activity exhibited by HA/WS when combined with cell investigation into apatite crystal biomineralization mechanisms at the nanoscale, aiming to comprehend natural bone formation processes and develop efficacious biomimetic implants for tissue engineering applications. The simultaneous examination of bone cell attachment and its interaction with ongoing internal nanocrystal formation will provide valuable insights for designing optimal scaffolds conducive to bone cell growth, which is imperative in tissue engineering endeavors.Keywords:hydroxyapatite;biomineralization;apatite crystal;bone tissue
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高影响因子
Catalysts
·
2024
·Vol. 14
·期 3
·183
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IF 3.8
Jiarong Ma,Run Zhou,Yu Tu,Ruixin Ma,Daimei Chen,Hao Ding
Ni3Si2O5(OH)4rods (NS) were synthesized via a hydrothermal method, employing natural wollastonite as a template. The hierarchical Ni3Si2O5(OH)4rods exhibited vertically oriented nanosheets, resulting in a substantial increase in the specific surface area (from 2.24 m2/g to 178.4 m2/g). Subsequently, a CdS/Ni3Si2O5(OH)4composite photocatalyst (CdS/NS) was prepared using a chemical deposition method. CdS was uniformly loaded onto the surface of the Ni3Si2O5(OH)4nanosheets, successfully forming a heterojunction with Ni3Si2O5(OH)4. The CdS/NS photocatalyst in the presence of lactic acid as a sacrificial agent demonstrated an impressive H2production rate of 4.05 mmol h−1g−1, around 40 times higher than pure CdS. The photocorrosion of CdS was effectively solved after loading. After four cycles, the performance of CdS/NS remained stable, showing the potential for sustainable applications. After photoexcitation, electrons moved from Ni3Si2O5(OH)4to the valence band of CdS, where they interacted with the holes via an enhanced interface contact. Simultaneously, electrons in CdS transitioned to its conduction band, facilitating hydrogenation. The enhanced performance was attributed to the improved CdS dispersion by Ni3Si2O5(OH)4loading and efficient photogenerated carrier separation through the heterojunction formation. This work provides new perspectives for broadening the applications of mineral materials and developing heterojunction photocatalysts with good dispersibility and recyclability.
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高影响因子
危险品化学品经营许可证（带存储）