CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2025
·
IF 3
Yan Shaohan,Wang Lijing,Shan Pengnian,Lin Xue,Shi Weilong
Against the backdrop of increasing energy shortages, hydrogen energy has garnered significant attention as a green and clean alternative energy source. To fully exploit a broader portion of the solar spectrum, we designed a Y 2 O 3 :Yb 3+ , Er 3+ /ZnIn 2 S 4 (denoted as YYE/ZIS) composite photocatalyst with a well-defined loaded structure of coating Y 2 O 3 :Yb 3+ , Er 3+ nanoparticles on the ZnIn2S4 micro-flowers, capable of efficiently utilizing near-infrared (NIR) light through an up-conversion mechanism. The introduction of Yb 3+ and Er 3+ ions endows the Y 2 O 3 with excellent up-conversion luminescence properties, enabling the effective conversion of lowenergy NIR photons into high-energy visible light over YYE/ZIS composite, which subsequently activates the ZIS component for NIR-driven photocatalytic hydrogen production. Photoelectrochemical characterizations reveal that the loaded structure significantly facilitates efficient charge separation and migration at the interface, while markedly suppressing the recombination of photogenerated electron-hole pairs, thereby enhancing the overall photocatalytic performance. Remarkably, the catalyst demonstrates excellent NIR-response hydrogen evolution performance (16.3 μmol·g -1 ·h -1 ) even in the absence of noble metal co-catalysts, such as Pt, achieving a hydrogen production rate approximately 10.9 times higher than that of pristine ZIS. This work proposes a novel approach for constructing up-conversion-enabled composite photocatalysts with rationally engineered interfacial architectures.
研究领域:
材料科学
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能源化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Baosong Li,Dandan Li,Jun Zhang,Wei Chen,Weiwei Zhang
The incorporation of TiN and Y 2 O 3 nanoparticles together into Ni-W matrix have been investigated by pulse electrodeposition in present study. The microstructural, surface properties and corrosion resistance of Ni-W/TiN-Y 2 O 3 nanocrystalline coating have been studied. It illustrated that the electrodeposited coatings have dense and nodular structure without defects. Results confirmed that TiN and Y 2 O 3 particles were uniformly embedded in the composites. The embedded particles could improve the hardness and anti-corrosion properties of the obtained coating. The crystallite size calculated based on the preferred orientation (111) plane was of 14–17 nm, illustrating the formation of nanocrystalline structure. The mean R a value was about 84.6 nm. Electrochemical impedance tests revealed that the preferred combination of operating parameters for optimum corrosion resistance was 70%, 1000 Hz, 40 min and 4 A dm −2 . However, the best hardness and anti-wear properties were obtained at parameters of 50%, 500 Hz, 6 Adm −2 and 60 min. The extreme values of hardness and corrosion resistance were not realized simultaneously. The operating parameters should be kept in a certain balance to avoid the formation of inferior properties in any aspects of the coating; then the other performance advantages could be brought into full play. The preferred combination of operating parameters was optimized to be duty cycle of 70%, frequency of 1000 Hz, duration time of 40 min and average current density of 4 Adm −2 , which enabled the electrodeposited coating optimum corrosion resistance and high mechanical properties .
研究领域:
材料科学
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电化学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2018
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IF 3.057
Y.M. Zhou,T. Zhang,K. Xu,F.L. Zhang,K. Bai,H.P. Huang,S.H. Wu,S.M. Luo
Owing to great hardness and low friction coefficients on steel, AlMgB 14 has several potential applications in the fields of cutting tools and wear-resistant materials. In the current work, the effect of Y 2 O 3 addition on the mechanical properties and microstructure of spark plasma sintered AlMgB 14 and AlMgB 14 -TiB 2 has been investigated. An increase in the amount of Y 2 O 3 led to an increase in the number of secondary phases including MgAl 2 O 4 and Y 2 O 3 in AlMgB 14 matrix. The addition of Y 2 O 3 led to a refinement in the grain size of AlMgB 14 and AlMgB 14 -TiB 2 ; however, simultaneously increased the porosity. With the addition of 3 wt% Y 2 O 3 , both AlMgB 14 and AlMgB 14 -TiB 2 reached the finest grain size and the highest hardness while maintaining a low porosity.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2025
·Vol. 33
·期 9
·19594-19604
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IF 3.3
Xincheng Cai,Junjing Duan,Zhangyi Huang,Zhangyi Huang,Zhangyi Huang,Lexing Liang,Boyao Ma,Zhenyu Zhang,Mao Deng,Mao Deng,Jianqi Qi,Jianqi Qi,Jianqi Qi,Tiecheng Lu
Y2O3–MgO composites are optical materials with promising applications for mid-infrared windows in extreme environments. Considering the refractive index differences between different phases and the Hall–Petch effect, intensifying phase homogeneity and reducing grain size enhances the optical and mechanical properties of composites. The grain sizes of composites are also influenced by phase homogeneity. However, research on the relationship and mechanism of phase homogeneity with the optical and mechanical properties of Y2O3–MgO composites is not quantitative and lacks gradient data support. In this study, the phase homogeneity was quantified and utilized as a gradient parameter to fabricate Y2O3–MgO composites by regulating the solvothermal temperature during powder synthesis. As the phase homogeneity increases, scattering is reduced and the grain size decreases, resulting in improved properties (transmittance at ∼6 μm rises from ∼5.5% to ∼81.5%). The gradientization and quantitative analysis of phase homogeneity in Y2O3–MgO composites can serve as a reference on optical composites, aiding in the optimization of properties.
研究领域:
材料科学
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光学
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机械工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 14
·2760
·
IF 4.967
Yu Ren,Ziyao Zhao,Wenwen Jiang,Guangyu Zhang,Yuxin Tan,Yongyin Guan,Long Zhou,Li Cui,Sung Woong Choi,Mei-Xian Li
In this study, Y2O3/TiO2-loaded polyester fabric was prepared to improve the catalytic activity of the TiO2and to increase its reuse efficiency. The samples were systematically characterized by scanning electron microscopy (SEM), X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (FT-IR). Furthermore, the degradation performance of methyl orange in the presence of simulated visible light irradiation was also investigated. The results showed that the TiO2in the Y2O3/TiO2composite photocatalyst was suitably anatase. In addition, Y2O3/TiO2-loaded polyester fabric had higher photocatalytic performance than that of pure polyester fabric under visible light and the degradation rate reached 83% after 120 min of light exposure but remained above 50% after repeated exposure (three times). Compared to the pure polyester fabric, Y2O3/TiO2-loaded polyester fabric had self-cleaning effects in methyl blue and soy sauce solutions under visible light.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Yuxuan Liao,Yifei Dai,Yifan Zhai,Aoping He,Huan He,Tianquan Liang
The effect of Sc 2 O 3 content on the corrosion behaviors of x Sc 2 O 3 -3.5Y 2 O 3 co-doped ZrO 2 (ScYSZ, x = 4.5, 5.5 and 6.5 mol.%) in calcium-magnesium-alumino-silicate (CMAS) at 1300 °C was investigated in this paper. It is shown that the ScYSZ ceramic exhibits better resistance to molten CMAS attack when doping with more Sc 2 O 3 . The CMAS penetration depth in the ScYSZ ceramic decreases with increasing Sc 2 O 3 . It is about 18 µm of CMAS penetrated depth in the 6.5Sc3.5YSZ after corrosion for 4 h at 1300 °C, including an 11 µm and 7 µm for the reaction-reprecipitation and grain-boundary infiltration layers, respectively. High thermochemical stability and weak reactivity of the ScYSZ to the glassy CMAS melt are beneficial to enhance the high temperature corrosion resistance, attributing to the low solubility in molten CMAS and the weak affinity to Ca 2+ for small ionic radius Sc 3+ . The mechanism of enhancing the resistance to CMAS is discussed.
研究领域:
材料科学
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腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2024
·
IF 3.2
Xinyu Liu,Xin Wang,Yan Sun,Hanmeng Zhang,Yichong Chen,He Feng,Lili Hu,Shubin Chen
Effect of the substitution of Y 2 O 3 for Al 2 O 3 in the phosphate glass, Nd 3+ : P 2 O 5 -Al 2 O 3 -ZnO, on glass structure and properties are investigated. With Al 2 O 3 replaced by Y 2 O 3 , the decrease in coefficient of thermal expansion and Young's Modulus, as well as the increase in fracture toughness, lead to a significant improvement in thermal shock resistance. According to the NMR and Raman spectra, changes in the coordination of Al 3+ from P-O-Al (6) bonds to P-O-Al (4) bonds and glass structure occur, resulting in inflection points in properties. Moreover, the fluorescence properties are measured and analyzed. The relationship between glass structure and physical (ρ, T g , α ), mechanical ( E, H V , K IC ), and optical properties ( n, σ ems , Δλ eff , λ P ) are explained.
研究领域:
材料科学
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光学材料
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无机化学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2023
·
IF 11.4
Jiaying Song,Lun Lu,Jian Wang,Xue Li,Jinying Li,Qianwen Wang,Haiyan Du,Shuaishuai Xin,Lina Xu,Qinghua Yan,Chengzhi Zhou,Guocheng Liu,Yanjun Xin
Nano Y 2 O 3 -modified biochar composites (Y 2 O 3 @BC600) were fabricated successfully and exhibited great adsorption toward oxytetracycline (OTC). The Langmuir adsorption capacity of Y 2 O 3 @BC600-1:4 for OTC reached 223.46 mg/g, 10.52 times greater than that of BC600. The higher dispersion of Y 2 O 3 nanoparticles, increased surface area of 175.65 m 2 /g and expanded porosity of 0.27 cm 3 /g accounted for higher OTC adsorption by Y 2 O 3 @BC600-1:4. Y 2 O 3 @BC600-1:4 could resist the interference of co-existing cations (Na + , K + , Mg 2+ , Ca 2+ ) and anions (Cl − , NO 3 − , SO 4 2− ) on OTC removal. Y 2 O 3 coating changed surface charge property of BC600, favoring the contribution of electrostatic interaction. Synchrotron radiation-based Fourier transform infrared spectroscopy detected obvious peak shift and intensity change of surface –OH when OTC adsorption occurred. Accordingly, stronger H-bonding (charge-assisted hydrogen bond, OTC–H 2 N + ···HO–Y 2 O 3 @BC600-1:4) was proposed for OTC adsorption. Y 2 O 3 @BC600 exhibited renewability and stability in the adsorptive removal of OTC. Therefore, Y 2 O 3 @BC600 may be a novel and suitable adsorbent for antibiotic removal.
研究领域:
环境科学
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纳米技术
·
抗生素污染治理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Weide Wang,Dongxu Yao,Hanqin Liang,Yongfeng Xia,Kaihui Zuo,Jinwei Yin,Yu-Ping Zeng
The effect of YH 2 on densification, microstructure, and thermal conductivity of Si 3 N 4 ceramics were investigated by adjusting the amount of YH 2 in the range of 0–4 wt% using a two-step sintering method. Native SiO 2 was eliminated, and Y 2 O 3 was in situ formed by a metal hydride reduction reaction, resulting in various Y 2 O 3 /SiO 2 ratios. Full densification of YH 2 -doped samples could be achieved after sintering at 1900 °C for 4 h. The Y 2 O 3 /SiO 2 ratio had a significant influence on the composition of crystalline secondary phases. Besides, the increased Y 2 O 3 /SiO 2 ratio is conducive not only to the grain growth but also to the reduction of activity of SiO 2 in the liquid phase, resulting in enlarged purified grains, reduced volume fraction of intergranular phases and increased Si 3 N 4 -Si 3 N 4 contiguity. Ultimately, the thermal conductivity increased by 29 % from 95.3 to 123.0 W m −1 K −1 after sintering at 1900 ℃ for 12 h by the substitution of Y 2 O 3 with YH 2 .
研究领域:
材料科学
·
热传导工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Yifei Cao,Haoyu Li,Xinyu Zheng,Siqing Wang,Chunming Zhou,Shiwei Chen,Peng Yang,Tianyuan Zhou,Hao Chen,Le Zhang
Zr 4+ ion doping is an effective method to enhance the optical and mechanical qualities of Y 2 O 3 transparent ceramics. In most previous studies, slowing down densification and inhibiting grain growth of Y 2 O 3 ceramic are generally recognized as the primary function of Zr 4+ additive during sintering. In this work, an interesting simultaneous precipitation phenomenon of Zr 4+ and Y 3+ ions was discovered and it directly led to the refinement of precursors and Y 2 O 3 powders. Consequently, the acting mechanisms of Zr additive should be demonstrated as the synergistic effect of refining precursor, producing oxygen interstitial and promoting solute-drag. Microstructure evolution and optical quality of Zr doped Y 2 O 3 ceramics were further investigated in detail. By doping 3.0 at.% Zr 4+ ions, Y 2 O 3 transparent ceramics with a transmittance as high as 82.3% at 1064 nm could be realized, after sintering at 1775 °C for 8h in vacuum. In general, this essential synergistic effect should be adequately considered in the preparation of heterogeneous ion doped transparent ceramics using the co-precipitation method.
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
·
2023
·
IF 4.9
Boxu Xu,Chao Song,Jie Song,Rui Huang,Shaomin Lin,Zhenxu Lin,Yi Zhang,Dejian Hou,Jun Song
In this study, Er 3+ /Yb 3+ codoped Y 2 O 3 –ZnO ceramic phosphors were prepared by sol–gel method. The samples had two emission bands, namely, green (535 nm) and red (660 nm), which are attributed to Er 3+ : 2 H 11/2 ( 4 S 3/2 ) → 4 I 15/2 and Er 3+ : 4 F 9/2 → 4 I 15/2 radiative transitions , respectively. The samples exhibited green- and red-emission intensity enhancement by 1.728 and 2.286 times that of the pure Y 2 O 3 host, respectively and by 514.468 and 214.341 times that of the pure ZnO host. The emission intensities are first enhanced by lattice expansion. With the change of Y:Zn ratio, the high surface energy is converted into low crystal surface resulting in the change of asymmetry crystal field for matrix. When the intensity of the asymmetric crystal field reaches maximum, both emissions are further boosted. When the high surface energy transforms into crystal surface energy, the microstructure changes into a compact mesoporous structure. Consequently, the chemical stability of the samples improves significantly, and the final emission band of the three samples with mesoporous structures is continuously red.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 42
·16147-16156
·
IF 8.067
Hailiang Fang,Beiying Zhou,Jiancheng Wang,Xiaobo Hu,Zesheng Pan,Shengjie Fan,Ping Huang,Shijia Gu,Lianjun Wang,Wan Jiang
Due to high thermal conductivity and excellent laser irradiation resistance, composite phosphor ceramics (CPCs) have been widely acknowledged as ideal color converters in laser lighting. However, achieving high-efficiency laser lighting is significantly limited by the inefficient utilization of pumping light. Microstructural tailoring is recognized as a promising strategy to improve the light extraction efficiency, while it is restricted by the harsh preparation conditions. Herein, we propose a novel Y2O3-YAG:Ce CPC controllably prepared from mesoporous Y2O3 powders and YAG:Ce phosphors using spark plasma sintering at a low temperature of 1160 °C. Attributed to the introduced Rayleigh scattering centers tailored by fine ceramic grains and well-matching of refractive indexes between the phosphor and the matrix, the Y2O3-YAG:Ce CPC exhibits an ultra-high relative internal quantum efficiency of 107% compared to that of the YAG:Ce phosphor. Impressively, when irradiated under a 450 nm laser diode, the as-prepared CPC produces white light with a high luminous efficiency of 178.42 l m W−1 and a low correlated color temperature of 4638 K, reflecting the enhanced light conversion efficiency. Furthermore, the CPC presents a remarkable improvement in thermal stability (only 6% luminescence loss at 200 °C) and is able to withstand a high laser flux density up to 6.16 W mm−2. These results demonstrate that the optimized Y2O3-YAG:Ce CPCs with designed microstructures are well suited for solid-state laser lighting with high power and brightness.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）