IONICS
·
2023
·Vol. 29
·期 10
·4013-4024
·
IF 2.8
Shang Haixin,Huang Zhiliang
Mono-doped lanthanum silicate solid electrolyte ceramics with phosphorus was successfully prepared by using the urea-nitrate combustion method at 600 °C. The crystal structure and morphology were analyzed by scanning electron microscope (SEM), infrared spectrometer (IR), and X-ray diffractometer (XRD), and the results showed that the successful doping of phosphorus into the lanthanum silicate electrolyte did not destroy the unique crystal structure of the space group P6 3 /m, and the best-sintered morphology of lanthanum silicate was achieved at 1500 °C. Meanwhile, the impedance test was conducted at 600 °C using electrochemical impedance spectroscopy (EIS), and the experimental data showed that with the increase of phosphorus doping, the conductivity of La 9.33 Si 6- x P x O 26+x/2 ( x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8) first increased and then decreased. Also, at x = 0.4, the conductivity of the electrolyte reached a maximum of 7.27 mS/ cm (800 °C), which is because when phosphorus enters the Si site in the lanthanum silicate crystal structure, interstitial oxygen is generated in the 6 3 channel of the structure to maintain the electrovalent balance, and the increase in the concentration of interstitial oxygen increases the conductivity of the electrolyte. Therefore, an enhanced conductivity mechanism with defects in interstitial oxygen concentration is proposed.
研究领域:
材料科学
·
固态离子学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Li Zhang,Bingbing Liu,Yuanbo Zhang,Guihong Han,Junjie Huang,Jing Ye,Yuelong Li
SiMn alloy is the largest consumption product in the Mn series alloys. Manganese silicates generated during the pre-treatment procedures of manganese ores are the main ingredient for SiMn alloy production. However, conventional cognition is that manganese and silicon in the silicates are respectively reduced to Mn 7 C 3 and SiC by carbon, and then the carbides interact to form alloy. In current study, pure MnSiO 3 was synthesized firstly and then a new perspective on the interface reaction and morphology evolution for the reduction of pure MnSiO 3 were investigated via XRD, SEM, XPS and thermodynamics analyses. Interface reaction showed that the MnSiO 3 was firstly reduced to manganese carbides and SiO 2 , and then the SiO 2 was further reduced by the carbides to generate SiMn alloy. The intermediate product Mn 7 C 3 played a crucial role since the reduction of SiO 2 by newly born Mn 7 C 3 preferentially conducted than the carbon reductant. Morphology evolution of the interface between C and MnSiO 3 as well as thermodynamic calculations of Mn-Si-O and Mn-Si-C-O systems were minutely clarified in this work to clarify the reduction mechanism. In addition, decomposition of SiMn alloy to SiC ceramic at 1700 °C was an important inducement to illustrate the frangibility of industrial SiMn alloy product.
研究领域:
冶金学
·
材料科学
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2020
·
IF 4.419
Zhenhai Xu,Jianming Gao,Zonghui Zhou,Yasong Zhao,Xuemei Chen
In order to clarify the enhancing mechanism of nano-TiO 2 (NT) on tricalcium silicate (C 3 S) paste, the hydration and microstructure of C 3 S with and without NT were investigated. Hydration properties were analyzed by setting time, compressive strength , hydration heat, Ca(OH) 2 content and relative content of C-S-H. Moreover, the microstructure of C 3 S paste was studied by pore structure and micromorphology. The results showed that seeding effect of NT promoted the chemical activity as well as hydration of C 3 S and more NT led to higher hydration degree. Besides, NT can increase the content of Ca(OH) 2 and the relative content of C-S-H, which also proved the enhancement effect of NT on C 3 S chemical activity and hydration. Furthermore, the seeding effect and filling effect of NT decreased total porosity, enhanced density and meliorated the microstructure of hardened C 3 S paste. Ultimately, the improved hydration and optimized microstructure introduced by NT enhanced the compressive strength of C 3 S paste.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2022
·
IF 3.574
Lei Chen,Changcheng Li,Qianping Ran,Xin Shu
Despite many studies of nanomaterials have been reported on the enhancement of cement-based materials, such as the pozzolanic effect of nano silica and flexural enhancement of fibers, there rarely are reports of the nanomaterials with both pozzolanic effect and shape-based enhancement. In this paper, anisotropic nanofibers were synthesized based on calcium silicates through hydrothermal method. Seed-mediated growth was conducted while SiO 2 nanoparticles served as the seeds and pseudo-wollastonite was used as the precursor. Importantly, the addition of the nanofibers can greatly improve the 28d flexural strength from 7.12 MPa to 8.99 MPa of the cement-based materials, which provides a new approach to realize the high performance of cement-based materials.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 1
·1-13
·
IF 21.8
Gong Hao,Wang Zhongyang,Song Xiaokun,Li Hongchao,Sun Kai,Zhou Xiao,Fan Tongxiang
Effective radiative cooling is crucial for reducing undesirable energy consumption caused by thermoregulation technology. However, conventional passive coolers still suffer from challenges such as vulnerability to harsh service conditions and suboptimal radiative cooling performance without guidance from optical design. Metacoating based on photonic structure design and all-inorganic components can overcome these drawbacks. In this paper, we fabricate a metacoating for radiative cooling, incorporating zirconia submicrospheres (ZS) within a potassium silicate binder. ZS with optimal diameters of about 500 nm were synthesized to efficiently scatter sunlight. The metacoating has a solar absorption ( α s ) of only 0.04 in the 0.25–2.5 µm range, and an infrared emittance ( ε ) of 0.91 in the 2.5–16.7 µm range. The low solar absorption is attributed to the high backscattering efficiency of ZS and their high-volume fraction, as confirmed by Mie scattering theory and Monte Carlo ray-tracing simulations, while the high emittance is driven by vibrational absorption from chemical bonds in ZS and potassium silicate. After proton and electron irradiation, the metacoating retains α s below 0.083 and ε above 0.910, indicating excellent irradiation resistance. Our findings highlight that metacoating utilizing ZS with a large bandgap and suitable diameters holds significant potential for advancing space radiative cooling technologies.
研究领域:
材料科学
·
光学工程
·
空间技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xinru Li,Jiale Li,Zhichao Liu,Can Liu,Yafei Guo,Tianlong Deng
The effective removal of strontium (Sr) from radioactive wastewater is essential for human health and ecological sustainability. However, due to the existence of a large number of coexisting ions, the selective removal of Sr 2+ from it remains a significant challenge. Herein, three novel metal-doped sodium vanadosilicates were developed by structural regulation. It was found that Co-doping can not only significantly reduce the dissolution loss of vanadosilicate (NaVOSi) from the adsorbent in extreme environments by adjusting the orbital energy distribution, energy band structure, bond length, and bond energy of sodium vanadosilicate crystals, but also further enhance the adsorption performance by reducing its zeta potentials and agglomeration phenomenon. The maximum adsorption capacity of the developed adsorbent (Co-NaVOSi) was up to 319.10 mg·g −1 within 5 min. When applied to Sr 2+ removal from simulated wastewater, the distribution coefficients of Sr 2+ reached 2943.15 mL·g −1 , and the separation coefficients between Sr 2+ and coexisting ions were above 64. DFT calculations further revealed the highly selective removal mechanism of Sr 2+ from wastewater. In addition, NaNO 3 was proved to be an efficient eluent. The excellent properties above make NaVOSi an excellent candidate for effectively removing Sr 2+ from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 11
·2665
·
IF 4.2
Gangan Wang,Chaoyi Chen,Junqi Li,Yuanpei Lan,Xin Lin,Jiahang Chen
The discharge of lead and cadmium wastewater, along with the pollution caused by phosphogypsum, represents a particularly urgent environmental issue. This study employed a straightforward hydrothermal method to convert phosphogypsum into porous calcium silicate hydrate (P-CSH), which was then used to remove and recover Pb(II) and Cd(II) from wastewater. The adsorption capacities of P-CSH for Pb(II) and Cd(II) were notably high at 989.3 mg/g and 290.3 mg/g, respectively. The adsorption processes adhered to the pseudo-second-order kinetics model and the Langmuir isotherm model. Due to identical adsorption sites on P-CSH for both Pb(II) and Cd(II), competitive interaction occurred when both ions were present simultaneously. Additionally, the adsorption efficacy was minimally impacted by the presence of common coexisting cations in wastewater. The dominant mechanisms for removing Pb(II) and Cd(II) via P-CSH were chemical precipitation and surface complexation. Moreover, the adsorbed heavy metals were efficiently separated and reclaimed from the wastewater through a stepwise desorption process. The primary components of the residue from stepwise desorption were quartz and amorphous SiO2. Following dissolution via pressurized alkaline leaching, this residue could be recycled for synthesizing P-CSH. This research offered a new strategy for the resourceful use of phosphogypsum and heavy metal wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Green Processing and Synthesis
·
2025
·Vol. 14
·期 1
·
IF 3
Yeqing Zhu,Xiaojun Huang,Tianxiang Yu,Kun Liu,Meng Zhang
The fly ash (FA) is one of the large amount of solid wastes stored in China. Because of its low price, large specific surface area, and surface electronegativity, reasonable modification can turn FA into treasure, prepared as an adsorption material with good adsorption performance. In this article, the industrial solid waste FA is used as raw material, and the FA-based sodium aluminosilicate was synthesized by a one-step hydrothermal alkali dissolution method and characterized by X-ray fluorescence, X-ray diffraction, scanning electron microscopy, Fourier transform infrared, Brunauer Emmett Teller, and other test methods. The results show that (1) aluminum silicate sodium hydrate can be synthesized by low-temperature method under atmospheric pressure to form P-type zeolite and calcite structure. (2) Alkali concentration, temperature, and reaction time affect the structure of aluminosilicate sodium hydrate. With the increase of alkali concentration, temperature, and reaction time, the product changes from P-type zeolite to calite structure. (3) The optimal synthesis condition of FA for sodium aluminosilicate hydrate is as follows: the concentration of NaOH solution is 4 mol·L −1 , the dissolution temperature is 80°C, the reaction time is 21 h, and the specific surface area is 60.54 m 2 ·g −1 .
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
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Min Ouyang,Jiachang Wu,Xiongjian Huang,Guoping Dong
The photopolymerization method for fabricating silica glass is a rapid, eco-friendly, and flexible technique. However, silica glass prepared via this method has limited solubility for rare-earth ions, making it difficult to achieve laser output with such low luminescence efficiency. Here, Al and P elements are introduced into the silica glass matrix to increase the Yb 3+ doping concentration to 1.2 wt%. It is revealed that the fluorescence intensity of the co-doped silica glass is greatly enhanced, making it more suitable as a laser gain material. A porous glass rod co-doped with Al/P/Yb is fabricated based on the above method, subsequently transforming it into a glass microsphere resonator through treatment with a hydrogen-oxygen flame and CO 2 laser. By pumping with a tapered optical fiber , the output of multi-mode (1033 nm and 1040 nm) lasers is achieved in whispering gallery modes (WGMs) resonator. This technology offers a simpler and more efficient method for fabricating laser microsphere resonators, which holds promise for applications in the field of integrated optics .
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Bojie Ding,Xinhao Cai,Shenglin Ma,Ruiting Liang,Imran Khan,Jianbei Qiu,Yue Liu,Anjun Huang,Zhiguo Song,Yangke Cun,Cherkasova Tatiana,Zhengwen Yang
Cesium lead halide perovskite (CsPbX 3 ) quantum dots (QDs) are recognized as viable substitutes for conventional fluorescent powder color converters, which can improve the color gamut and reproducibility of liquid crystal displays (LCDs). Encapsulating QDs in glass can effectively solve the water oxygen stability of QDs, but the glass matrix impedes the nucleation of QDs and the precipitation of QDs requires secondary heating. In our research, we successfully accomplished the self-crystallization of CsPbBr 3 QDs facilitated by LiF within a B 2 O 3 -SiO 2 -ZnO borosilicate glass matrix. The results indicate that the self crystallization of CsPbBr 3 QDs induced by LiF in borosilicate glass matrix has a synergistic effect. The Li + ions can break the glass network structure and facilitate ionic migration and transport, while F − ions have good electronegativity due to ion aggregation, and can strongly attract Cs + and Pb 2+ ions with larger atomic radii, thereby promoting the rapid nucleation and growth of CsPbBr 3 QDs, ultimately synthesizing QDs with uniform particle size, narrow half peak width, good optical properties, and thermal stability.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Feng Zhang,Dazhao Wang,Guanxin Du,Hongwei Li,Dianhao Hou,Yankun Qi,Shichao Lv,Shifeng Zhou
The scintillating photonic glass has the great potential for medicine imaging, nuclear physics, high-energy physics, and national defense. However, the development of the candidate with the high density remains a significant challenge. Herein, the superdense scintillating glasses derived from the Ce 3+ -activated Lu 2 O 3 -SiO 2 binary system were successfully fabricated by the strategy of contactless aerodynamic levitation heating under the N 2 atmosphere. These glasses are colorless, optical homogeneous, and exhibit superdense density from 6.59 to 7.15 g/cm 3 , representing the highest density among the fast decay glass systems. The materials present excellent radiation-blocking ability, suitable emission wavelength, and fast response, indicating the promise for fast-event X-ray detection. The micro radiation probe was fabricated by connecting the scintillating glass and the optical fiber. The practical application in remote radiation detection is demonstrated and it exhibits excellent linear response and high signal-to-noise ratio. The results confirm that the fabricated superdense scintillating glass is promising for application in the field of high-energy radiation detection.
研究领域:
材料科学
·
核物理学
·
医学成像
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Pengju Xia,Yifeng Lei,Wanyuan Li,Kaiting Wu,Chengyu Ni,Man Xu,Wubin Dai
With the growing public awareness of protecting vision and prevention of hazardous effects, there is much-needed research on a “healthy” full visible spectrum under near-ultraviolet (nUV) excitation in phosphor-converted white light-emitting diodes (pc-wLEDs) to fill the “cyan gap” and avoid employing a blue LED chip. Herein, a novel series of borosilicates Ba2CaB2Si4O14 (BCBS): Ce3+/Tb3+/Sm3+/Sr2+/Na+ phosphors, presenting color-tunable photoluminescence (PL), high quantum yield (QY), and thermal stability, were designed and synthesized via a facile solid-phase reaction. The Rietveld analyses, density functional theory (DFT) simulations, and theoretical calculations of bond energy together imply the site occupations of Ce/Tb/Sm on Ba2+/Ca2+ sites with a preferred location on Ca2+ over the Ba2+ site. The broad/bright cyan-PL from BCBS: Ce under nUV excitation is associated with the allowed f–d transitions of Ce3+ and dual-site occupancies. The forbidden f–f transitions of both the green-PL of Tb and the red-PL of Sm were insensitive to the site environment and helpful to PL color regulation. The cascading Ce → Tb → Sm energy transfer is confirmed, where Tb is regarded as an energy transfer (ET) bridge to avoid the metal–metal charge transfer (MMCT) effect. The introduction of Na+ as both flux and charge compensator is for the sake of decreasing defects from heterovalent substitutions and regulating morphology. Further incorporation of Sr2+ is to modulate the lattice environments of dopants for controlling the shift of PL. Finally, as a proof-of-concept implement, a pc-wLED assembled by BCBS: Ce/Tb/Sm/Sr/Na and an nUV LED chip via a remote “capping” packaging strategy show attractive performance.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）