CERAMICS INTERNATIONAL
·
2012
·
IF 1.751
Qing Ma,Songping Wu,Chan Jiang,Jianhui Li
SnO 2 -doped CaSiO 3 ceramics were successfully synthesized by a solid-state method. Effects of different SnO 2 additions on the sintering behavior, microstructure and dielectric properties of Ca(Sn 1− x Si x )O 3 ( x =0.5–1.0) ceramics have been investigated. SnO 2 improved the densification process and expanded the sintering temperature range effectively. Moreover, Sn 4+ substituting for Si 4+ sites leads to the emergence of Ca 3 SnSi 2 O 9 phase, which has a positive effect on the dielectric properties of CaO–SiO 2 –SnO 2 materials, especially the Qf value. The Ca(Sn 0.1 Si 0.9 )O 3 ceramics sintered at 1375 °C possessed good microwave dielectric properties: ε r =7.92, Qf =58,000 GHz and τ f =−42 ppm/°C. The Ca(Sn 0.4 Si 0.6 )O 3 ceramics sintered at 1450 °C also exhibited good microwave dielectric properties of ε r =9.27, Qf =63,000 GHz, and τ f =−52 ppm/°C. Thus, they are promising candidate materials for millimeter-wave devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 17
·e202404262
·
IF 2
Zhiwei Cai,Junhao Chen,Ning Jiang,Chao Chen,Shijun Ma,Yimin Shen,Guojun Xu,Corinne Boudon,Yaokang Lv,Laurent Ruhlmann
Graphical Novel Ag/TiO 2 @CaSiO 3 materials were synthesized by using Ag-doped titanium cage [AgTi(SC) 2 (HSC)(CH 3 CN)] 2 . Ag + ions serve to disrupt bacterial cell membranes while amplifying the bactericidal effects of superoxide ions and hydroxyl radicals generated by TiO 2 . Within the Ag/TiO 2 @CaSiO 3 materials, Ag/TiO 2 is uniformly distributed on the CaSiO 3 substrate, manifesting significant antibacterial activity. The investigation presents a newly synthesized Ag/TiO 2 @CaSiO 3 composite derived from an orange titanium cage. Obtained through a streamlined fabrication process and calcination at variable temperatures, the material underwent distinct structural alterations. Characterization analyses indicated the emergence of a porous architecture, facilitating robust Ag + ion adsorption. Among the variants studied, materials calcined at 150 °C demonstrated enhanced antibacterial activity against both Escherichia coli and Staphylococcus aureus . The integration of CaSiO 3 into the Ag/TiO 2 matrix resulted in the formation of Ag/TiO 2 @CaSiO 3 . This composite amalgamates the immediate antibacterial efficacy of Ag + ions with the enduring antibacterial functionality of Ag/TiO 2 , additionally augmenting antibacterial performance through reactive oxygen species generation. Owing to its remarkable antibacterial attributes, the Ag/TiO 2 @CaSiO 3 composite is a promising candidate for addressing infection control challenges in medical settings.
研究领域:
材料科学
·
微生物学
·
医学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2020
·
IF 4.982
Yue Cao,Bing Song,Min Song,Fanyue Meng,Yuexing Wei,Qi Cao
Arsenic with high volatility and toxicity is usually generated during coal combustion and the capture of arsenic is restrained at high temperature since the sintering of adsorbents. Therefore, it is necessary to develop an adsorbent with sintering resistance for the arsenic removal at high temperature. In the study, the arsenic vapor capture by CaSiO 3 , CaO and SiO 2 was carried out in the flue gas with/without SO 2 and NO at high temperatures from 1000 °C to 1200 °C. The results showed that CaSiO 3 exhibited excellent arsenic capture with the capacity of 4.98 mg/g and the capture efficiency was increased with the temperature increasing. The effect of acid gases was also considered. A certain amount of CaSO 4 with poor capture performance was formed on CaSiO 3 surface in the presence of SO 2 , leading to the decrease of the amount of arsenic captured. On the other hand, the effect of NO was not obvious as SO 2 . Although arsenic capture was suppressed when introduced SO 2 and NO, it still remained considerable arsenic capture for the CaSiO 3 adsorbent. Additionally, the pivotal role of O 2 was also studied. Taking into account the high capture capacity and excellent anti-sintering property, CaSiO 3 was a good adsorbent suitable for the removal of arsenic from coal combustion flue gas.
研究领域:
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 38
·期 4
·999-1004
·
IF 1.307
Yuan Mingwei,Shi Shunli,Luo Yanping,Yu Ying,Wang Shuhua,Chen Chao
Hollow mesoporous silica(HM-SiO 2 ) was prepared by the improved stober method. On this basis, HM-SiO 2 was dispersed in an alkaline solution for surface etching. Meanwhile, calcium source was introduced to combine with SiO
2− 3
on the surface to form a CaSiO 3 shell layer and an unprecedent SiO 2 @CaSiO 3 sphere with a hollow double-shell structure was obtained. The as-synthesized SiO 2 @CaSiO 3 was characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), N 2 -BET, IR and UV-Vis techniques, and its sustained release capacity of doxorubicin(DOX) loading was investigated. The drug loading capacity can be achieved to 0.692 mg DOX/mg SiO 2 @CaSiO 3 , exhibiting pH-responsivity under low pH conditions.
研究领域:
材料科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 5
·3209-3218
·
IF 3.9
Hongcheng Yang,Qian Liu,Zhan Wang,Yuandan Dong,Enzhu Li
Designing and fabricating antennas that exhibit low losses and are compact, lightweight, and highly radiation efficient are challenging in the wireless-communication field. In this study, we simulated and fabricated microstrip patch antennas using β-CaSiO 3 low-temperature co-fired ceramic (LTCC) as dielectric resonator substrate. Compact ceramics that show good microwave dielectric properties (a relative dielectric constant [ ε r ] of 6.57, high-quality factor [ Q × f ] of 35 086 GHz [@14.85 GHz], and temperature coefficient of frequency [ τ f ] of −33.56 ppm °C −1 for the optimal composition) were obtained when Li 2 O–CaO–B 2 O 3 –CuO glass was added to β-CaSiO 3 and sintered at 950°C. The high-frequency properties of these composite ceramics reveal that the dielectric constant and dielectric loss are stable in the 38−58 and 70−90 GHz ranges, respectively. Furthermore, a circularly polarized antenna fabricated using a CaSiO 3 -based ceramic shows a high radiation efficiency (92.04%) and gain (3.35 dBi) at a center frequency of 2.5 GHz. These β-CaSiO 3 composite ceramics offer promising prospects for high-frequency use as well as in mobile communication applications. This study provides insight for the development of innovative antennas with new LTCC materials.
研究领域:
材料科学
·
无线通信
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xinnian Gou,Peng Shen,Jiang Wu,Xingyue Qi,Fei Qi,Ping He,Hong Yao,Guangqian Luo,Qizhen Liu,Yongfeng Qi
CaSiO 3 exhibits good arsenic capture performance, but it falls short of meeting the actual needs of power plants due to its susceptibility to acidic gases that inhibit its arsenic capture ability. In this study, an Al 2 O 3 /CaSiO 3 adsorbent was prepared by combining the anhydrous grinding and calcining methods. Arsenic vapor capture was conducted in flue gas containing or free of SO 2 and HCl within the temperature range of 800–1000 ℃. The research indicated that the preparation method used in this study resulted in uniform Al 2 O 3 doping that was less prone to agglomeration, thereby creating a good pore structure. The Al 2 O 3 /CaSiO 3 adsorbent exhibited the strongest arsenic capture capacity when the atomic molar ratio of Al/Si was 1:5, with an arsenic capture amount of 871.2 mg/kg, which was significantly higher than the capture capacity of the control group calcium silicate . The doping of Al atoms altered the structure and charge distribution of CaSiO 3 silica-oxygen chains, resulting in the formation of Al active sites with higher adsorption energy, which is more favorable for the adsorption of arsenic. Although the Al 2 O 3 /CaSiO 3 adsorbent reacts with acidic gases to form CaSO 4 and CaCl 2 , which can inhibit arsenic capture, it still maintains a high arsenic capture rate. Al 2 O 3 /CaSiO 3 has excellent arsenic removal, sintering resistance, and acid resistance, making it a promising composite adsorption material for arsenic removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Shouyu Lu,Lei Sun,Shun Liu,Ping He,Jiang Wu,Mei Ma,Yang Ling,Hong Yao,Guangqian Luo,Dapeng Wang
A Fe 2 O 3 /CaSiO 3 composite adsorbent was synthesized using calcium nitrate as a precursor for the adsorption and removal of As 2 O 3 from high-temperature flue gas at temperatures ranging from 1073 K to 1273 K. A combination of experimental investigations and theoretical calculations was employed to analyze the impact of Fe-doped calcium silicate on its arsenic adsorption performance, as well as to elucidate the adsorption mechanism of the Fe 2 O 3 /CaSiO 3 composite material for As 2 O 3 . The experimental results demonstrated that the incorporation of Fe 2 O 3 resulted in an enhanced pore structure within the material. When the molar ratio of Fe:Si was set at 1:5, the Fe 2 O 3 /CaSiO 3 adsorbent exhibited optimal As 2 O 3 adsorption capacity at 1273 K, achieving a remarkable value of 996.0 mg/kg—significantly higher than that observed with pure calcium silicate. During the adsorption process, the doped iron oxide released additional free electrons, thereby facilitating the conversion of lattice oxygen into chemisorbed oxygen. Furthermore, density functional theory (DFT) calculations were utilized to further investigate the microscopic mechanisms underlying the behavior of the Fe 2 O 3 /CaSiO 3 composite adsorbent. The findings indicated that Fe sites within Fe 2 O 3 /CaSiO 3 served as primary active sites and electron transport channels for this material, promoting both separation and conversion processes involving lattice oxygen. During arsenic adsorption, significant orbital hybridization occurred between Fe atoms and O atoms in As 2 O 3 , which contributed to enhancing stability within the chemisorption system. Overall, Fe 2 O 3 /CaSiO 3 displayed exceptional performance in terms of arsenic adsorption capabilities along with notable anti-sintering properties, positioning it as a promising composite material for effective arsenic removal under high-temperature conditions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 45
·期 3
·3710-3714
·
IF 3.057
Yue Hu,Zhen Xiao,Huanping Wang,Can Ye,Yuqian Wu,Shiqing Xu
Porous CaSiO 3 ceramics were prepared via a solid-state reaction method using CaCO 3 and SiO 2 as raw materials and active carbon as a pore-forming agent. The results indicated that porous CaSiO 3 ceramics could be obtained under a low sintering temperature of 1320 °C. The addition of active carbon significantly affected the volume density, microstructure, pore size distribution and mechanical strength of porous CaSiO 3 ceramics. With the increase of active carbon content, the volume density decreased, meanwhile the pore size and porosity increased gradually. Besides, the three-point bending tests demonstrated that the mechanical strength was decreased with increasing active carbon content. However, all the porous ceramics still exhibited high mechanical strength. These results implied that the increase of active carbon content not only enlarged the pore size and enhanced the porosity, but also kept a remarkable mechanical strength of porous CaSiO 3 ceramics. Therefore, these rationally designed CaSiO 3 porous ceramics will be a highly potential material in various applications due to its high mechanical strength, low sintering temperature and narrow pore size distribution.
研究领域:
材料科学
·
生物陶瓷
·
组织工程
·
生物医学材料
·
无机非金属材料
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Funian Han,Liang Yu,Xinyun Mo,Lu Zhang,Jiaqi Jia,Jingmeng Dong,Shaopeng Gu
The particle size distribution (PSD), composition, morphology, and formation mechanism of particulate matter (PM) released from the combustion of spent pot lining with and without CaSiO 3 were investigated. The results showed that NaF and Na 3 AlF 6 were found to be the main compositions of PM, and the particle size distribution of PM shows a bimodal distribution. CaSiO 3 substantially inhibited the emission of PM by transforming NaF, Na 3 AlF 6 , and CaF 2 into stable Ca 4 Si 2 O 7 F 2 . Moreover, CaSiO 3 also limited the formation of high hazardous PM 0.2 by providing SiO 2 , Al 2 O 3 , and NaAlSiO 4 with high melting points as the core of promoting the growth of PM in particle size.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yuansheng Lin,Zhilong Guo,Suling Dong,Yixin Li,Bohong Kan,Kongyin Zhao,Sidi Li,Zhengchun Yang
Hydrogels showed superiorities in molecularly imprinting sensors for detecting biomolecules owing to their stimulus-responsive nature. However, the excessive swelling of hydrogel during the elution process damages the imprinting cavities, leading to a reduction in sensitivity. In this study, a molecularly imprinted electrochemical sensor was designed for rapid protein recognition. The sensor utilized a composite hydrogel based on hybrid cross-linked calcium alginate/calcium silicate (CaAlg/CaSiO 3 ) to mitigate the excessive swelling of the CaAlg hydrogel. The preparation involved coating a bare carbon electrode with a sodium silicate-sodium alginate (Na 2 SiO 3 -NaAlg) mixed solution, cross-linking with CaCl 2 solution, and eluting bovine serum albumin (BSA) with Tris-HCl solution. The incorporation of CaSiO 3 nanoparticles stabilized the organic-inorganic hybrid structure, enhancing the hydrogel's resistance to swelling and maintaining cavity integrity. The molecularly imprinted polymer (MIP) sensor demonstrated high selectivity for BSA, excellent repeatability, long-term stability, and reproducibility, showing the potential for improved sensitivity in biomolecule detection.
研究领域:
生物传感技术
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2016
·Vol. 95
·期 6
·1109-1116
·
IF 1.066
Jianqiang Zhang,Jian Luo,Jun Gao,Dianhua Liu
Catalytic hydrogenation of acetic acid to ethanol was investigated in a fixed-bed micro-reactor with calcium silicate-modified platinum-tin catalyst at mild reaction condition. The modified catalyst exhibited excellent performance for the ethanol synthesis process at relatively low pressure. According to the results of H 2 -pulse chemisorption experiments, the introduction of calcium silicate promoted the dispersion of platinum particles. The NH 3 -TPD and H 2 -TPR results showed the decrease of acid content on catalyst surface and the enhancement of reducibility after the CaSiO 3 modification. Additionally, the results of XPS indicated that Sn (0) was emergent and Pt (2+) was sharply decreased after reduction. Both the H 2 -TPR and XPS results supported the formation of Pt-Sn alloy during the reduction process at 623 K. The Pt-Sn alloy changed the electron density and benefited the free hydrogen dissociation and hydrogenation. The enhancement of reaction temperature and pressure both promoted acetic acid conversion. The kinetic model of power-function type was established to describe the process of hydrogenation. The results of residual analysis confirmed that the raised kinetic model for acetic acid to ethanol reaction was suitable.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Fan Wang,Wei Liu,Yongsong Ma,Di Chen,Peng Li,Huayi Yin,Wei Li,Dihua Wang
Silicon nanotubes (SNTs) are very attractive in the fields of energy, catalysis, and sensors, but a facile template- and/or catalyst-free preparation method is still absent. Herein, we study a controllable and cost-effective approach for preparing SNTs by electrochemically reducing layer-structured calcium silicate (CaSiO3) in molten CaCl2/NaCl without any template and catalyst. The underlying mechanism of the SNT formation is uncovered: the layer-structured CaSiO3 is first electrochemically exfoliated into SiOx (0 < x < 2) sheets while releasing CaO into the molten salts, and then the SiOx sheets are electrochemically reduced and simultaneously crimped into SNTs. The diameter (120–312 nm) and wall thickness (∼40 nm) of the SNTs can be tailorable by manipulating the reduction potential between −1.28 and −1.48 V (vs Ag/AgCl). Lastly, the electrolytic SNTs show a high lithium storage capacity of 3737 mAh g–1 at 0.2 A g–1, a high rate capability of 1371 mA h g–1 at 10 A g–1, and stable cycling with a capacity of 974 mAh g–1 after 600 cycles at 1 A g–1. Overall, the template- and catalyst-free electrochemical method provides a straightforward and facile way to prepare SNTs with a brand-new mechanism that can be applied to other tubular structure materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）