CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Minglu Sun,Peng Zhou,Jiali Peng,Chuanshu He,Ye Du,Zhicheng Pan,Shijun Su,Fan Dong,Yang Liu,Bo Lai
Generation of reactive radicals via photocatalytic peroxymonosulfate (PMS) is restricted by the sluggish kinetics of PMS decomposition and lack of electron transfer channel. Herein, we firstly prepared rare earth oxide functionalized carbon nitride (5-ScO-CN) by simple in-situ one-step calcination method, and surprisingly found it mediated photoexcited electron transfer between PMS and organic contaminants to boost PMS based oxidation decontamination. Rare earth oxide proceeds as active sites to mediate electron transfer from organic contaminants and PMS under visible light irradiation, it concurrently elevates fast oxidation of organic contaminant and activation of PMS to produce reactive radicals to further oxidize organic contaminants. We conducted density functional theory (DFT) calculation and galvanic oxidation process (GOP) to further unveil the role of 5-ScO-CN for mediating photoexcited electron transfer and generation of reactive radicals. This work proposes a novel mechanism for visible light boosted PMS based oxidation and provides a novel strategy for application of photocatalytic oxidation in environmental remediation field.
研究领域:
环境科学
·
光催化
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Qiang Liu,Kai Cui,Zihang Liao,Changyi Wu,Longhui He,Shuwei Yao
Electrospun alumina-mullite ceramic nanofibrous membranes show great potential for high-temperature thermal insulation applications. However, the influence of scandium oxide (Sc 2 O 3 ) addition on their phase evolution and high-temperature stability has rarely been investigated. Herein, the concentration-dependent effect of Sc 2 O 3 (0–5 wt.%) on these membranes was systematically studied. Microstructural and crystallization kinetics analyses reveal a non-monotonic doping behavior. A Sc 2 O 3 content of 1 wt.% delays mullitization and retains a fine-grained, flexible nanofiber architecture after calcination at 1400 °C. In contrast, Sc 2 O 3 additions of 3 wt.% and 5 wt.% induce excessive lattice distortion, accelerate mullite crystallization, and promote abnormal grain growth. These findings demonstrate that the Sc 2 O 3 doping concentration determines the transition from grain refinement to coarsening, providing a basis for designing durable ultra-high-temperature ceramic nanofibrous membranes.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jimei Xue,Fei Li,Yuqiang Liu,Fan Yang,Zexin Hou
Modified SiOC ceramic as advanced functional material has drawn great attention due to low density, tailored microstructure and high-temperature oxidation resistance . However, the lower dielectric property hindered microwave absorption (MA) performance. Herein, Sc 2 O 3 reinforced SiOC composite ceramics with tailorable composition were successfully prepared by pyrolysis of a Sc (NO 3 ) 3 modified polysiloxane (PSO) precursor at 1000 °C followed by heat-treatment at 1300 °C. The in-situ growth of Sc 2 Si 2 O 7 and SiC nanowires from amorphous SiOC ceramic effectively improved dielectric and MA performance. Therefore, as-obtained composite ceramic with 10 wt% Sc achieved the broadest effective absorbing bandwidth (EAB) covering the whole X-band and the minimum reflection coefficient (RC) of −22.37 dB at 10 GHz at 3.1 mm. The excellent MA property is primarily attributed to the balance of conductive loss from SiC nanowires and multiple interfacial polarization loss. This work will contribute to the designing strategy of microwave absorbing ceramics materials and inspire researchers for their future work.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2020
·
IF 2.65
Xiao-yu Zhang,Min Xu,Sheng-zhu Cao,Wen-bo Chen,Wen-yao Yang,Qin-yu Yang
Diamond/copper composite has been considered as one of the next generation thermal management materials. Interfacial modification is an essential means of ameliorating interface wettability and bonding of diamond/copper composite for improving its thermal conductivity . In the present work, Diamond/copper composite was manufactured by using spark plasma sintering (SPS) technology with 60% volume fraction of diamond mixed with 40% volume fraction of copper power, chromium powder (0.7 wt%) and scandium oxide powder (0.21 wt%). A series of material analysis methods were used to characterize the microstructure, interfacial layer , phase compositions and distributions of Diamond/copper composite. The total and partial electron density of states (DOS) for Diamond-Cr-Sc 2 O 3 interfacial model was investigated by means of first-principles calculations from CASTEP modules. The results showed Sc 2 O 3 made a 5–20 nm well-arranged and uniformly distributed interfacial chromium carbide layer in the interface region, which played a critical role in increasing the amount of reactive interfacial bonding and decreasing defect. The addition of Sc 2 O 3 brought the increasing number of heat transfer carriers at the interface and made the interface energy system more stable. The obtained diamond/copper composite exhibited that the wettability between diamond particles and copper was effectively improved. The thermal conductivity of diamond/copper is 872 W/(m·K) and the possible reasons for doping rare-earths Sc 2 O 3 to improve the thermal conductivity were discussed.
研究领域:
材料科学
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复合材料工程
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界面科学
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热管理材料
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粉末冶金
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计算材料学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Peng Shu,Yunzhu Ma,Wensheng Liu,Juan Wang,Shuwei Yao
Al 2 O 3 -ZrO 2 biphasic fibers were of considerable interest due to their superior mechanical properties and thermal stability. Despite this, precise control over fiber structure and further enhancement of thermal stability remained significant challenges. This study investigated the regulation of phase transformation behavior and thermal stability in Al 2 O 3 -ZrO 2 fibers through Sc 2 O 3 doping. The findings demonstrated that Sc 2 O 3 doping facilitated the formation of α-Al 2 O 3 and t-ZrO 2 phases within the fibers. In samples containing 1 wt.% Sc 2 O 3 , the average crystal size of α-Al 2 O 3 was 160 nm, while t-ZrO 2 crystals displayed a bimodal nanoscale distribution. The Weibull strength of these fibers reached 1.99 GPa. Following exposure to 1200 °C for 100 h, most α-Al 2 O 3 crystal sizes remained within the 200-300 nm range. The mechanism by which Sc 2 O 3 doping affects structural evolution and enhances the thermal stability of Al 2 O 3 -ZrO 2 fibers was also examined.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 22
·期 1
·e14882
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IF 1.8
Yifei Dai,Yuxuan Liao,Aoping He,Huan He,Tianquan Liang
The hot corrosion behaviors of the Sc 2 O 3 –Gd 2 O 3 –Y 2 O 3 co-doped ZrO 2 (SGYSZ) ceramics in Na 2 SO 4 + V 2 O 5 molten salts at high temperature were investigated in this work. The results show that the SGYSZ exhibits good hot corrosion resistance to the 50 wt% Na 2 SO 4 + 50 wt% V 2 O 5 molten salts at 1000°C. It is attributed to the doping of small Sc 3+ , which can decrease the M–O bonding length and increase the binding energy, and then reduce the dissolution and loss of the stabilizer as rare-earth cations Gd 3+ and Y 3+ from the SGYSZ. The significant synergistic effects of Sc 3+ , Gd 3+ , and Y 3+ are beneficial to enhance the phase stability and corrosion resistance of the zirconate ceramic due to the different ionic radius and basicity of rare-earth oxides (RE 2 O 3 ). More Gd 3+ in SGYSZ can promote the forming and coarsening of the GdVO 4 during mineralization, which can also decrease the loss of Y 3+ from the SGYSZ. The corrosion mechanism is discussed in detail.
研究领域:
材料科学
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陶瓷
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高温腐蚀
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无机化学
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2025
·
IF 1.4
Yaping Huang,Botian Zhu,Xuyang Feng,Hualin Zhang,Haoyou Jiang,Yongfang Qian,Ying Wang
The aim of our research reported in this paper was to develop electrospun (Sc2O3-MgO)/alizarin/polycaprolactone/polyvinylpyrrolidone nanofiber membranes with pH-responsive and antibacterial properties. Scanning electron microscopy results showed that alizarin (ALI) was uniformly distributed in the polycaprolactone/polyvinylpyrrolidone (PCL/PVP) matrix, forming pH-responsive membranes. The X-ray diffractometer (XRD), attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and thermal analysis results demonstrated that both ALI and Sc2O3-MgO loadings were effective. Moreover, the addition of 0.16 wt% ALI induced distinct color changes (from pale yellow to purple, pH = 2-12) in the ALI/PCL/PVP nanofiber membranes. This behavior stemmed from the hydroxyl group in ALI forming an intramolecular hydrogen bond with the carbonyl oxygen, enabling proton transfer. Furthermore, the ALI/PCL/PVP membranes containing 2.00 wt% Sc2O3-MgO showed good antibacterial effect against Escherichia coli (E. coli) within 24 h, of what indicating its strong antibacterial activity. In addition, a comprehensive 8-day analysis was conducted on the pH, total volatile basic nitrogen (TVB-N) and total number of live bacteria colonies of the shrimp, as well as the color changes in the film. The experiment proved that the shrimp not covered by the film became highly spoiled on the 4th day, while the shrimp covered with the SAPP-2-3 nanofiber membranes only reached a state of high spoilage on the 6th day. Therefore, the SAPP-2-3 nanofiber membranes can effectively extend the shelf life of the shrimp by 2 days. We believe this study provides a new strategy for the research of multifunctional smart food packaging films.
研究领域:
材料科学
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食品包装技术
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纳米技术
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高分子科学
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2026
·Vol. 16
·期 9
·1110
·
IF 3.4
Maomao Guo,Zhigang Wang,Min Xie,Rende Mu,Xiwen Song,Yonghe Zhang,Ting Wang
The corrosion resistance of electron-beam physical vapor-deposited (EB-PVD) zirconia thermal-barrier coatings depends on ceramic phase stability. Here, conventional 8YSZ and two Sc2O3-Y2O3co-stabilized ZrO2coatings, ScYSZ and ScYSZ with an Al-rich interlayer (ScYSZA), were comparatively investigated under three chloride-containing environments: NaCl (N) corrosion, high-temperature Na2SO4-NaCl (NN) corrosion, and Na2SO4-NaCl-V2O5(NNV) corrosion. Phase evolution and microstructural degradation were examined by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and energy-dispersive spectroscopy. Under N exposure, the ceramic top coats largely retained the tetragonal t′-ZrO2phase, whereas degradation was concentrated near the ceramic/bond-coat interface. NN corrosion caused limited bulk phase transformation. The most pronounced degradation occurred under NNV exposure, particularly in 8YSZ, where extensive YVO4formation and progressive t′→m transformation were accompanied by substantial disruption of the columnar ceramic structure. After 100 h of NNV corrosion, 8YSZ contained only 23.7 wt.% t′-ZrO2. In contrast, ScYSZ and ScYSZA retained 82.6 and 84.4 wt.% t′-ZrO2, respectively, confirming the superior phase stability and corrosion resistance of the ScYSZ-based coatings, particularly ScYSZA. These results demonstrate that chloride-containing environments produce distinct degradation pathways involving interfacial oxidation, corrosive-species ingress, and phase destabilization, highlighting the importance of integrating ceramic composition with coating architecture to improve the durability of EB-PVD thermal-barrier coatings.
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DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 19
·2300517
·
IF 9
Yining Wang,Mengmeng Shang,Shuai Huang,Yixin Sun,Yiying Zhu,Xiaole Xing,Peipei Dang,Jun Lin
Cr 3+ -activated near-infrared (NIR) phosphors are one of the most influential candidates for the new generation of intelligent NIR phosphor-converted light-emitting diode (pc-LED) light sources. For spectral analysis, the broader the spectrum, the more useful information it contains. Herein, ultra-broadband Cr-activated Sc 2 O 3 nanophosphors, which exhibit NIR ultra-broadband from 650 to 1600 nm, are developed by the sol–gel method. This ultra-broadband emission originates from the presence of Cr 3+ and Cr 4+ , two luminescent centers confirmed by diffuse reflection spectra, electron paramagnetic resonance, time-resolved photoluminescence spectra, and temperature-dependent emission spectra. The nanophosphor exhibits excellent temperature-sensing performance with S A = 4.102% K −1 and S R = 1.855% K −1 . Co-doping Yb 3+ into Sc 2 O 3 nanophosphors builds the Cr 3+ -Yb 3+ -Cr 4+ model to bridge the spectral gap located at 1000 nm, forming a continuous NIR ultra-broadband spectrum ranging from 650 to 1600 nm for the first time. Moreover, the introduction of Yb 3+ improves the thermal stability of nanophosphors from 29.49% to 50.65% at 150 °C. The NIR transmission spectra of water, ethanol, and peanut oil demonstrate that Sc 2 O 3 :Cr 3+ -Yb 3+ -Cr 4+ NIR nanophosphors favor potential applications in spectral analysis. The construction of a Cr 3+ -Yb 3+ -Cr 4+ spectral bridge for realizing NIR ultra-broadband phosphors based on cheap blue LEDs provides novel and effective insights.
研究领域:
材料科学
·
光学材料
·
光子学
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固态照明
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传感器
·
光谱学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Fang Yuan,Jianxin Wang,He Miao,Cunxin Guo,Wei Guo Wang
The ternary system (Yb 2 O 3 ) x –(Sc 2 O 3 ) (0.11− x ) –(ZrO 2 ) 0.89 ( x = 0–0.11) specimens have been prepared using a co-precipitation method. The properties of this series of samples are affected by the ytterbium element. A stabilized cubic phase is obtained at room temperature by introducing ytterbium and the unit cell parameters show a linear increasing relationship with content of Yb 2 O 3 , which also contributes to abatement of the conductivity from 0.099 S/cm to 0.020 S/cm at 800 °C. However, the conductivity tends to remain a constant at lower temperatures ranging from 500 °C to 650 °C as the addition of Yb 2 O 3 is reduced to below 3 mol%, achieving high up to 0.015 S/cm at 650 °C for a 3Yb8ScSZ body, indicating a potential to be utilized as an electrolyte material for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ACTA MATERIALIA
·
2023
·
IF 9.4
Junyan Gao,Peng Liu,Jinshu Wang,Ruimin Zhang,Yunfei Yang,Wenyuan Zhou,Hexiong Liu,Junhao Sun
The size and distribution of Sc 2 O 3 in the composite powder precursor has great effect on the emission property of scandate cathode. By one-step in-situ synthesis method, the composite powder exhibits the structure of quasi-spherical Sc 2 O 3 nanoparticles grown in situ on the surface of W/Ir grains, and the obtained W–Ir cathode with 3wt % Sc 2 O 3 could provide the emission current density of 83.43 A/cm 2 at 900 °C b , which is higher than other W–Ir mixed matrix scandate cathodes and W matrix scandate cathode. The XRD results showed that the high emission ability depended on the high content of active phase α-Ba 2 ScAlO 5 and low content of non-active phase BaAl 2 O 4 . In-situ TEM has been applied to observe the microstructure evolution of the cathode surface at high temperature for the first time. A serial change in the microstructural features of cathode surface and the migration of Ba, Sc and O on the substrate surface has been found, confirming the formation of Ba-Sc-O active layer. The first-principles calculations indicate that the active substances (Sc) are more stable (low adsorption energy of − 8.58 eV) on the IrW matrix cathode surface than on the tungsten matrix cathode surface, which is consistent with the low evaporation rate of the active substance detected by TFMS technique. Besides, the interaction between the active substance and the matrix was strengthened due to more electron transfer of Sc (1.88 e) and Ba (1.45 e), therefore lowering the work function . The feasible preparation technique makes such a cathode promising for applications in high-power microwave devices.
研究领域:
材料科学
·
电子工程
·
表面科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）