MEASUREMENT SCIENCE and TECHNOLOGY
·
2020
·Vol. 31
·期 9
·095102
·
IF 1.857
Qianchun Zhang,Qin Zhou,Yan Wang,Yun Wu,Li Jiang,Yuguo Zheng,Junyi Liang
We report that cyclopentanone on the surface of nanosized dysprosium oxide (nano-Dy2O3) has strong chemiluminescence emission. A cyclopentanone gas sensor was built based on this phenomenon with a response time of 3 s and a recovery time of 10 s. The cataluminescence characteristics and factors affecting the signal intensity of cyclopentanone sensor were investigated in detail including selecting the appropriate sensing material, detection wavelength, working temperature, and air flow rate. Under these optimized conditions, the calibration curve of the cataluminescence intensity versus cyclopentanone vapor concentration was linear over 0.100–15.0 μg ml−1 with a correlation coefficient (R2) of 0.9973; the limit of detection was 17 mg m−3 (signal/noise = 3). The relative standard deviation (RSD, n = 10) was 1.86% for ten replicates. The selectivity was significantly higher for the target analyte. The sensor was then used to analyze cyclopentanone in spiked samples and organic laboratory environment sample. The results show satisfactory recoveries of 93.3%–108% and RSDs of 7.9%–8.6% indicating that the developed sensor has the potential for the rapid analysis of cyclopentanone.
研究领域:
分析化学
·
材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Xiaodong Yang,Shuaiqi Luo,Jinfeng Zhou,Pengkai Sun,Yuanxia Guo,Jin Zhao,Kai Wang,Bowen Jiang,Tianyang Luo,Enshuo Zhang,Shengjun Zhao,Jianing Fang,Lili Wang,Ye Han,Fanming Zeng,Andrew R. Zimmerman,Bin Gao
New and sustainable approaches for the removal of cationic organic pollutants, such as methyl violet (MV) and methylene blue (MB) dyes, from aqueous solutions are needed. In this study, hickory wood was pyrolyzed with montmorillonite and then ball milled with dysprosium oxide at 350 rpm for 3 h, without any use of toxic compounds. The resulting composite was rich in oxygen-containing functional groups (e.g., carboxyl and hydroxyl), had uniform lamellar-porous micromorphology and a surface area (88.9 m 2 g −1 ) 2.5 times that of the original biochar. The composite exhibited excellent removal of aqueous methylene blue (113.6 mg g −1 ) and methyl violet (107.6 mg g −1 ), which was approximately 6.6 and 2.6 times that of the biochar. Modeling and characterization results suggest that the adsorption of cationic organic pollutants on the composite was controlled by multiple mechanisms including electrostatic attraction, hydrogen bonding, ion exchange, and surface complexation. After five regenerations, the composite maintained methylene blue (87.4 %) and methyl violet (84.8 %) removal ability, thus demonstrating good stability and reusability potential. These findings highlight the advantages and potential of ball-milled dysprosium oxide-loaded-biochar-montmorillonite composite for water treatment and environment remediation.
研究领域:
环境科学
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材料工程
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水处理技术
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纳米技术
·
化学工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Huicong Cheng,Yalei Wang,Qingbo Wen,Huaifei Liu,Nannan Wu,Xiang Xiong
A series of novel dual-phase medium-entropy (La 1/3 Gd 1/3 Yb 1/3 ) 2 Zr 2 O 7 , (La 0.25 Sm 0.25 Gd 0.25 Yb 0.25 ) 2 Zr 2 O 7 , (La 0.25 Gd 0.25 Dy 0.25 Yb 0.25 ) 2 Zr 2 O 7 and high-entropy (La 0.2 Sm 0.2 Gd 0.2 Dy 0.2 Yb 0.2 ) 2 Zr 2 O 7 (LSGDY) materials were designed and synthesized via an optimized chemical coprecipitation method. This study systematically investigates their precursor reaction pathways, structural evolution and resulting microstructure. Furthermore, the synthesis mechanism and high temperature phase stability of dual-phase high-entropy LSGDY were also discussed in detail. Results reveal that the precursor features a composite hydroxide structure with interconnected -[Zr-OH-Zr]-, -[Zr-OH-RE]- and -[RE-OH-RE]- chains, enabling atomic level cross-linking and mixing of RE and Zr elements. During the calcination process, the precursor initially transforms into a metastable fluorite phase nanocrystalline through dehydration and structural rearrangement, followed by further phase differentiation driven by the sequential cations and anions order. In contrast to medium-entropy systems, the synthesized LSGDY exhibits a unique dual-phase nanocomposite structure, where nanoscale pyrochlore phases are coherently embedded within a fluorite phase matrix, introducing significant dislocations and lattice distortions. The synergistic effect of preferential fluorite phase formation and high configurational entropy suppresses the long-range pyrochlore phase ordering, stabilizing the dual-phase nanocomposites. Furthermore, annealing tests at 1600 °C for 100 h confirm the excellent phase stability of LSGDY, demonstrating its great application potential for TBCs. This work not only elucidates the synthesis-structure correlations in dual-phase high-entropy zirconates, but also provides a new strategy for the property modulation of advanced high-entropy ceramics.
研究领域:
材料科学
·
陶瓷
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纳米材料
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高熵材料
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热障涂层
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jiaqi Zhao,Kejie Li,Dongxu Guo,Mengmeng Dai,Zhiying Wang,Zuoling Fu
Mechanoluminescence materials exhibit fascinating optical properties due to their energy harvesting and controllable release capabilities. SrAl2O4:Eu2+ (SAOE) has been extensively studied as a traditional mechanoluminescence material, however, the luminescence intensity enhancement and the luminescence mechanism of its mechanoluminescence remain an unresolved issue, which hinders the development and widespread application of excellent phosphors. Herein, a promising rare earth (Re3+ = Sm3+, Dy3+, Er3+, and Tm3+) doping strategy was proposed to achieve intense mechanoluminescence of SAOE. By introducing different Re3+ ions to manipulate the energy level positions in SAOE phosphors, the depth and density of electron and hole traps can be tuned, resulting in the maximum mechanoluminescence intensity of SrAl2O4:Eu2+, Tm3+ is about 11-fold higher than that of SAOE. The mechanism governing trap distribution has been unveiled through thermoluminescence glow curve analysis and density functional theory calculations. Our research provides valuable guidance for designing high-performance phosphors and opens up new opportunities for multifunctional applications.
研究领域:
材料科学
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光学材料
·
发光学
·
固体物理
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产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Yun Lv,Yanhong Wang,Yaling Dou,Ang Li,Jinkui Tang,Olga S. Volkova,Alexander N. Vasiliev,Hongcheng Lu
We report the synthesis and magnetic properties of three rare-earth magnetic compounds RE2O2CN2 (RE = Nd, Dy, Gd) with a frustrated triangular spin–lattice, as well as their thermal stability and Fourier transform infrared (FTIR) spectroscopy. The magnetic susceptibility results show paramagnetic behavior with no long-range order (LRO) down to 2 K in Nd2O2CN2 and Dy2O2CN2 due to spin frustration, which are further confirmed by the specific heat measurements, despite the large Curie–Weiss temperature for strong intralayer interaction through the RE–O–RE pathway (RE = Nd, Dy). While Gd2O2CN2 with a large spin exhibits LRO at 2.7 K, which should be caused by the non-negligible interlayer interactions. The field-dependent magnetization curves show a linear increase up to 7 T for Nd2O2CN2 and Gd2O2CN2, which are far from their saturation. While the magnetization of Dy2O2CN2 increases linearly below 3 T, then slowly increases to saturation, and the magnetization value is 6.62 μB at 7 T. Our work provides promising magnetic triangular lattice systems to further investigate frustration and quantum magnetism in rare-earth magnetic systems.
研究领域:
凝聚态物理
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材料化学
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磁性与磁性材料
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量子材料
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产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·Vol. 13
·期 33
·e02250
·
IF 7.2
Xuan Fan,Yanmin Yang,Mengjie Zhang,Zhiting Jiang,Chongyang Cai,Leipeng Li
Persistent phosphors, which exhibit prolonged luminescence after the cessation of excitation, hold considerable potential for a wide range of applications. However, the fundamental mechanisms governing persistent luminescence (PersL) are not yet fully understood. In this study, the archetypal YPO 4 :Ce 3+ /Dy 3+ system is investigated to provide new insights into the PersL mechanism. Under X-ray irradiation, the co-doped phosphor exhibits the characteristic emissions of both Ce 3+ (335, 356 nm) and Dy 3+ (486, 575 nm). Efficient energy transfer from Ce 3+ to Dy 3+ is confirmed, indicating their close spatial proximity. Remarkably, co-doping synergistically enhances the PersL performance of both ions, with their PersL durations being significantly prolonged compared to their singly doped counterparts. Further analysis suggests that Ce 3+ stabilizes the Dy 3+ luminescent center, a phenomenon that is attributed to the formation of associated Ce 3+ -Dy 3+ complexes. These findings support a model where such complexes act as effective charge trapping centers, enhancing PersL. Building on these tunable properties, a potential application in dynamic anti-counterfeiting is demonstrated. This work deepens the understanding of PersL mechanisms in co-doped phosphors and offers a strategy for the rational design of advanced luminescent materials.
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DOI
高影响因子
Laser & Photonics Reviews
·
2025
·Vol. 19
·期 14
·2500439
·
IF 10
Ze Wang,Kai Li,Chengxue Deng,Yu Zhang,Sur Lig,Hala Muji,Qixu Tian,Kefu Chao,Yu Wang,Dengfeng Peng
Mechanoluminescent (ML) materials are promising for applications in structural health monitoring, biomedicine, stress sensing, and stress distribution visualization due to their ability to emit light without external circuits. However, current ML materials face challenges, including limited luminescent colors, high raw material costs, toxicity, and lack of emissions in the invisible light spectrum. To overcome these challenges, Ca 2 P 2 O 7 (CPO) is selected as the matrix material due to its excellent piezoelectric properties, low cost, and biocompatibility. CPO is doped with various luminescent ions (X, X = Ce 3+ , Eu 2+/3+ , Tb 3+ , Dy 3+ , Mn 2+ , Sm 3+ ) to achieve the emission bands of CPO:X across a wide range of wavelengths including UV, blue, green, yellow and red. Unlike traditional trap-controlled ML materials, CPO:X does not require UV pre-irradiation and exhibits remarkable self-recovery properties. First-principles density functional theory (DFT) calculations confirmed that CPO is an ideal matrix for self-recovering ML materials. Based on these properties, several practical devices are designed, including a fencing competition scorekeeper, a wearable flexible skin, and a protective dental crown layer. These innovations offer new directions for the development and application of ML materials.
研究领域:
材料科学
·
生物医学工程
·
可穿戴电子学
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光学材料
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力致发光
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牙科材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·Vol. 54
·期 6
·4882-4890
·
IF 2.5
Fu Yingtao,Chen Zhaoyang,Sun Yifan,Liu Yi,Fan Yanwei,Wang Junhua,Chen Huiming
In order to develop glass-ceramic materials capable of emitting neutral white light and to address the limitations of single rare earth element ion-doped luminescent materials, a glass-ceramic material containing Dy 3+ /Eu 3+ -co-doped NaCaPO 4 nanocrystals was successfully synthesized using the melt-quenching and two-step crystallization methods. The prepared glass-ceramic materials were characterized by X-ray diffraction, transmission electron microscopy, and photoluminescence spectroscopy. The energy transfer process between Dy 3+ and Eu 3+ ions was confirmed through excitation spectra, emission spectra, and luminescence decay curves. The emission coordinates and correlated color temperatures of samples with different doping concentrations were calculated using the standard CIE 1931 colorimetric system. The results showed that coordinated emission was achieved in the glass-ceramic containing NaCaPO 4 nanocrystals under excitation at 363 nm. Furthermore, by adjusting the concentration ratio of Dy 3+ and Eu 3+ ions, the color temperature of the white light emission could be tuned from 9910 K to 5349 K, enabling modification of the emission color from the cool-white region to the pure-white region, with chromaticity coordinates reaching (0.3350, 0.3040). Additionally, the material exhibited high thermal stability, with an activation energy of 0.18649 eV. It is expected that the Dy 3+ /Eu 3+ -co-doped NaCaPO 4 glass-ceramic studied here has broad prospects for applications in white light-emitting diodes.
研究领域:
材料科学
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光子学
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光学材料
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稀土掺杂
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固态照明
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产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Minghai Yao,Bo Li,Hanxiao Gao,Gengguang Luo,Lulu Liu,Hangyao Wu,Ze Yuan,Jiahong Li,Shenglin Jiang,Guangzu Zhang,Haibo Zhang,Yang Liu
Piezoelectric actuators, enabling the conversion of electrical energy into mechanical strain, are pivotal in various electromechanical applications. The morphotropic phase boundary (MPB) approach has been widely used to enhance the electrostrain performance of piezoelectrics. It remains to be explored alternative frameworks beyond the conventional MPB method. Here, a high-entropy strategy is used to enhance the electromechanical response of ferroelectric materials with pristine composition near MPB. By incorporating chemical disorders through the high-entropy strategy, atomic disordered arrangements and severe lattice distortions are induced in the BiFeO3–BaTiO3 (BF-BT) system, thus promoting the formation of nanopolar regions and nanodomain structures, facilitating a more flattened energy profile and mutual phase transformation under an electric field and improving the electromechanical response activity of lattices. As a result, high-entropy BF-BT-based polycrystalline ceramics exhibit an ultrahigh electromechanical response with a giant unipolar electrostrain of 1.23% at 80 kV cm–1 with fatigue-free resistance to cyclic electric fields. The effective converse piezoelectric coefficient (d33*) reaches 1537 pm V–1, surpassing most lead-free piezoelectrics. Our work highlights the potential of high-entropy design in ferroelectric materials as high-performance piezoelectric actuators.
研究领域:
材料科学
·
铁电材料
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压电材料
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陶瓷工程
·
功能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Lin Fan,Ce Li,Tao Peng,Miao Yan,Xiaoqing Pei,Yifan Liu,Weiling Yang,Shasha Li,Hai Lin,Chun Li,Lina Liu,Xuechao Yu,Fanming Zeng
Phosphor-converted white light-emitting diodes (w-LEDs) have become indispensable for modern lighting and display technologies. However, the development of efficient and thermally robust white phosphors remains a persistent challenge. Here, we report a series of Sr 3 Y 2 Ge 3 O 12 : Dy 3+ garnet-based phosphors that exhibit dual emissions at 480 and 580 nm, enabling cool-white light generation. Co-doping with La 3+ effectively lowers the crystal symmetry and narrows the band gap from 4.67 to 4.56 eV, which enhances the radiative transitions of Dy 3+ . As a result, the emission intensities at 480 and 580 nm bands are boosted by factors of 2.21 and 1.91, respectively. The spectral modification drives a chromaticity shift from cool to warm white light, with correlated color temperature decreasing from 4703 K to 2927 K. Moreover, the modified phosphors exhibit excellent thermal stability (92.51 % at 150 °C) while maintaining high internal quantum efficiency (29.43 %). When integrated with 365 nm excitation chips, the phosphors enable the fabrication of w-LEDs with tunable color temperatures. These findings offer a promising pathway for the design of next-generation high-performance warm w-LEDs.
研究领域:
材料科学
·
发光材料
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半导体照明
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固态物理
·
无机化学
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产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 31
·期 1
·
IF 4.6
Jingfei Luan,Minghe Ma,Liang Hao,Hengchang Zeng,Anan Liu
A novel Z-scheme Dy2TmSbO7/BiHoO3heterostructure photocatalyst was synthesized with the ultrasound-assisted solvothermal method. The Dy2TmSbO7/BiHoO3heterojunction photocatalyst (DBHP) reflected wonderful separation efficiency of photogenerated electrons and photogenerated holes owing to the efficient direct Z-scheme heterojunction structure characteristic. The lattice parameter and the bandgap energy of the Dy2TmSbO7were 10.52419 Å and 2.58 eV, simultaneously, the lattice parameter and the bandgap energy of the BiHoO3were 5.42365 Å and 2.25 eV, additionally, the bandgap energy of the DBHP was 2.32 eV. Above results indicated that DBHP, Dy2TmSbO7or BiHoO3possessed an excellent ability for absorbing visible light energy, therefore, DBHP, Dy2TmSbO7or BiHoO3owned superior photocatalytic activity for degrading the sulphamethoxypyridazine (SMP) under visible light irradiation. The removal rate of the SMP after visible light irradiation of 135 min with the DBHP was 99.47% for degrading the SMP during the photocatalytic degradation (PADA) process, correspondingly, the removal rate of the total organic carbon (TOC) concentration after visible light irradiation of 135 min with the DBHP was 98.02% for degrading the SMP during the PADA process. The removal rate of the SMP after visible light irradiation of 135 min with the DBHP was 1.15 times, 1.29 times or 2.60 times that with Dy2TmSbO7, BiHoO3or nitrogen-doped TiO2(N-T). Therefore, the DBHP displayed higher photocatalytic activity for degrading the SMP under visible light irradiation compared with Dy2TmSbO7, BiHoO3or N-T. Specifically, the mineralization rate for removing the TOC concentration during the PADA process of the SMP with the DBHP was 1.18 times, 1.32 times or 2.79 times that with Dy2TmSbO7, BiHoO3or N-T. In addition, the stability and reusability of the DBHP were systematically evaluated, confirming that the DBHP owned potential applicability for degrading the antibiotic pollutant, which derived from the practical industrial wastewater. Trapping radicals experiments and the electron paramagnetic resonance measurement experiments were conducted for identifying the reactive radicals, such as the hydroxyl radicals (•OH), the superoxide anions (•O2−) and the photogenerated holes (h+), which were generated with the DBHP for degrading the SMP during the PADA process under visible light irradiation, as a result, the •O2−possessed the maximal oxidative capability compared with the •OH or the h+. Above results indicated the degradation mechanism and the degradation pathways which were related to the SMP. In conclusion, this study makes a significant contribution for the development of the efficient Z-scheme heterostructure photocatalysts and provides a key opinion to the development of the sustainable remediation method with the view of mitigating the antibiotic pollution.
研究领域:
材料科学
·
光催化
·
环境化学
·
纳米材料
·
半导体物理
·
废水处理
·
抗生素降解
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xuan Zhou,Xiaojun Yang,Hui Li,Peng Zhang
High-entropy rare-earth zirconates (RE 2 Zr 2 O 7 ) have attracted considerable attention as thermal barrier coatings (TBCs) candidates. In this study, pyrochlore RE 2 Zr 2 O 7 (RE = Nd, Sm, Eu, Gd, Dy) ceramics were synthesized with a fixed average RE 3+ radius while varying configurational entropy by tuning the number of principal cations. The ceramics were synthesized and systematically examined to assess the effect of entropy on thermo-mechanical properties. With increasing entropy, the thermal conductivity and the coefficients of thermal expansion of the entropy engineering designed RE 2 Zr 2 O 7 are improved, attributable to enhanced anharmonicity from elemental mixing, which leads to lattice distortion and a high density of dislocations. These features intensify phonon scattering and strengthen the Grüneisen response. Fracture toughness is also enhanced owing to increased energy dissipation during crack propagation via dislocation interactions. This work highlights configurational entropy engineering as a general route to tune thermo-mechanical properties for promising TBC top coat candidates.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）