JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Guang-Xin Xiang,Guo-Jun Wang,Zhi-Jun Zhang,He Feng,Jing-Tai Zhao,Jiao Wang,Xin-Yuan Sun,Ri-Hua Mao,Yong Wang
The uniform 1D nano-rods of RE 3+ doped Ln 7 O 6 F 9 ( Ln = Y and Lu; RE = Pr, Sm and Eu) were synthesized through a facile two-step hydrothermal method without extra fluorine source followed by post-heat treatment. The phase formation, morphologies, as well as photoluminescence properties of the materials were investigated. The precursor composition was determined to be Ln (OH) 1.69 F 1.31 using the Fourier transform infrared spectrum (FT-IR), thermal gravimetric and differential scanning calorimetry (TG-DSC). The average lengths of Y 7 O 6 F 9 and Lu 7 O 6 F 9 were about 6.8 and 7.9 μm, respectively, with the average width of about 650 nm. It was interesting that the tip of the nano-rods exhibits a straight line and divergent umbrella shaped bifurcation for Y 7 O 6 F 9 and Lu 7 O 6 F 9 , respectively. Upon ultraviolet excitation, Pr 3+ , Sm 3+ and Eu 3+ ions in Ln 7 O 6 F 9 showed blue, orange and red emissions originating from their characteristic f-f transitions. In addition, the 4 f 1 5 d 1 → 4 f 2 band emissions (340–450 nm) as well as typical 4 f 2 → 4 f 2 line emissions (450–700 nm) of Pr 3+ were observed in Pr 3+ -doped Ln 7 O 6 F 9 . For Sm 3+ -doped Ln 7 O 6 F 9 , only the typical f - f transitions of Sm 3+ were observed with the absence of charge transfer (CT) band. However, the broad excitation bands at 255 nm attributing to the charge transfer transition of Eu 3+ (i.e. O 2− → Eu 3+ CT) were observed in Eu 3+ -doped Ln 7 O 6 F 9 .
研究领域:
材料科学
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纳米技术
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光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 18
·11534-11542
·
IF 4.036
Bohan Wang,Zhihao Wang,Peng Mao,Yu Wang
Conventional luminescent materials generally exhibit uni-color and transient emission under UV excitation, which makes them mediocre in the field of anti-counterfeiting. The high-level anti-counterfeiting techniques are always becoming more complicated and in need of multi-color and persistent luminescent materials. Herein, we report a series of β-NaYF4:RE3+ (RE = Sm, Tb, Dy, Pr) persistent luminescent phosphors with multi-color emitting and ultra-long persistent luminescence under the irradiation of X-rays. The effects of doping concentrations of RE3+ on the size, morphology, radioluminescence and afterglow performance of the products are investigated in detail. Hexagonal structured rod-like β-NaYF4:Tb3+ crystals show super strong X-ray response and the afterglow signal lasts for up to seven days after X-rays are turned off. Upon X-rays irradiation, some of the F− ions are expected to escape from the crystal lattice by elastic collisions, leading to the generation of Frenkel defects: the F vacancies and interstitials , which capture electrons and release them slowly to achieve different afterglow emission times. Taking advantages of the extraordinary radioluminescence performance of the β-NaYF4:RE3+ persistent luminescent phosphors, the dynamic anti-counterfeiting patterns that containing rich time-resolved information were successfully designed.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Zhen Pu,Jianwei Qin,Xiaoguo Fu,Ruizhi Qiu,Bin Su,Maobing Shuai,Fang Li
Fundamental investigation of metal–CO interactions is of great importance for the development of high-performance catalysts to CO activation. Herein, a series of side-on bonded mononuclear lanthanide (Ln) oxocarbonyl complexes OLn(η2-CO) (Ln = La, Ce, Pr, and Nd) have been prepared and identified in solid argon matrices. The complexes exhibit uncommonly low C–O stretching bands near 1630 cm–1, indicating remarkable C–O bond activation in these Ln analogues. The η2-CO ligand in OLn(η2-CO) can be claimed as an anion on the basis of the experimental observations and quantum chemistry investigations, although the CO anion is commonly considered to be unstable with electron auto-detachment. The CO activation in OLn(η2-CO) is attributed to the photoinduced intramolecular charge transfer from LnO to CO rather than the generally accepted metal → CO π back-donation, which conforms to the traditional Dewar–Chatt–Duncanson motif. Energy decomposition analysis combined with natural orbitals for chemical valence calculations demonstrates that the bonding between LnO and η2-CO arises from the combination of dominant ionic forces (>76%) and normal Lewis “acid–base” interactions. The fundamental findings provide guidelines for the catalyst design of CO activation.
研究领域:
无机化学
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物理化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Jianhua Liu,Jiarui Duan,Deyin Wang,Yuhua Wang
Phytochrome Pr and Pfr are essential for plant growth and photosynthesis, primarily absorbing deep red light at 660 nm and near-infrared (NIR) light at 730 nm. This paper is dedicated to enhance the efficiency of deep red to NIR light emission in BaLu 2– x SiAl 4– y O 12 (BLSA): x Ce 3+ , y Cr 3+ through an energy transfer strategy designed to promote plant growth and improve night vision. It is found that sample doped solely with Cr 3+ can emit deep red to NIR emission in BLSA; however, the spin-forbidden nature of the Cr 3+ 3d→3d transition leads to low luminescence efficiency. On the contrary, in Ce 3+ -doped BLSA, Ce 3+ ions efficiently absorb blue light and emit intense green light, which overlaps the wavelength range of Cr 3+ absorption spectrum. This spectral overlap promotes the energy transfer from Ce 3+ to Cr 3+ , thereby enhancing the deep red to NIR emission of Cr 3+ . This enhancement is evidenced by the external quantum efficiency of Cr 3+ emission, which is 12.5% in the sample doped solely with Cr 3+ and is increased to 48.6% when co-doped with Ce 3+ ions. The energy transfer mechanism between Ce 3+ and Cr 3+ is found to primarily involve dipole-dipole interactions, as described by Dexter's formula and multipole interaction modeling. In addition, by using BLSA:0.1Ce 3+ ,0.03Cr 3+ phosphor to fabricate NIR lighting devices, it is found that the emission spectra are highly matched with the absorption spectra of the phytochromes Pr and Pfr, demonstrating its great potential for application in indoor plant growth lighting. Moreover, the lighting source system is adaptable for various scenarios such as night vision and non-invasive bio-imaging, showcasing its promising versatility for application.
研究领域:
植物学
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光学材料
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植物生理学
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光子学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2020
·
IF 2.888
Yahui Gao,Chuanyan Li,Shuqian Xia,Peisheng Ma
In this work, the solubility of CO 2 in three binary hydrocarbon mixtures of different molecular structures, hexane + cyclohexane, cyclopentane + ethylbenzene and toluene + undecane at 313.15 K, 343.15 K, 373.15 K and pressures up to 13.83 MPa were measured. The solubility measurements were undertaken in the designed apparatus. The experimental results show that the solubilities of CO 2 in the binary hydrocarbon mixtures are mainly affected by the molecular structure and carbon numbers of hydrocarbon. The more ratios of high-carbon hydrocarbon in the mixtures, the lower solubility of CO 2 is. The experimental data were compared with the calculated results of PR and PSRK models. The average absolute relative deviations of bubble pressure were 2.54%–5.66% and 1.45%–7.66%, respectively. Both models gave satisfied results, while the PR was superior to PSRK when the interaction parameters of the relevant systems were provided. PRSK model can calculate the solubility data better near the critical region.
研究领域:
化学工程
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热力学
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石油工程
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 7
·963
·
IF 2.67
Weili Wang,Shihai Miao,Dongxun Chen,Yanjie Liang
Trivalent lanthanides (Ln3+) doped bismuth-based inorganic compounds have attracted considerable interest as promising candidates for next-generation inorganic luminescent materials. Here, a series of K0.3Bi0.7F2.4(KBF) nanocrystalline particles with controlled morphology have been synthesized through a low-temperature aqueous-phase precipitation method. Using KBF as the host matrix, Eu3+, Tb3+, Pr3+, Nd3+, Sm3+,and Dy3+ions are introduced to obtain K0.3Bi0.7F2.4:Ln3+(KBF:Ln) nanophosphors. The as-prepared KBF:Ln nanophosphors exhibit commendable photoluminescence properties, in which multicolor emissions in a single host lattice can be obtained by doping different Ln3+ions when excited by ultraviolet light. Moreover, the morphology and photoluminescence performance of these nanophosphors remain unchanged under different soaking times in water, showing good stability in a humid environment. The proposed simple and rapid synthesis route, low-cost and nontoxic bismuth-based host matrix, and tunable luminescent colors will lead the way to access these KBF:Ln nanophosphors for appealing applications such as white LEDs and optical thermometry.
研究领域:
材料科学
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纳米技术
·
光学
·
化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Feng Jiang,Jie Liu,Duo Zhou,Junxiong Zhang,Zhibin Chen,Guo Feng,Quan Zhang,Xiaojun Zhang,Jianmin Liu,Yun Yu
In this study, high chroma Ce and Pr co-doped zircon-yellow ceramic pigments were synthesized via an in-situ molten salt-assisted method. The effects of Pr doping content and Si/Zr molar ratio on the color performance, phase composition, and microstructure of the pigments were systematically investigated. The results indicated that the introduced of Pr cations not only serve as the chromogenic center but also promotes the crystallization of zircon. The optimal color performance of the sample was achieved when the Pr doping content was 0.07 and the Si/Zr molar ratio was 1.05, with corresponding CIELAB values of L∗ = 77.29, a∗ = 13.78, b∗ = 76.12, and C∗ = 77.36. This color performance was remarkably superior to that of a commercially available high-grade yellow pigment ( L∗ = 82.04, a∗ = −1.62, b∗ = 56.28, and C∗ = 56.30). The synthesized pigment exhibited remarkably coloring performance, a small particle size with a narrow distribution (D 10 = 1.15 μm, D 50 = 3.72 μm, and D 90 = 7.88 μm), and good dispersibility. The in-situ molten salt-assisted method employed in this study offers advantages such as low calcination temperature, reduced environmental impact, and simple operation. This method provides a reliable strategy for the eco-friendly synthesis of high performance yellow ceramic pigments used in premium ceramic decoration.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zhenyu Zhang,Ning Wang,Xingzi Wang,Zheng Zhao,Chen Dong,Xianmin Tan,Yuanyuan Zheng,Zongyu Feng,Xiangxi Zhong,Juanyu Yang,Xiaowei Huang
With the linewidth of integrated circuits has progressively narrowed, imposing higher demands on the chemical mechanical polishing (CMP) process. Cerium oxide nanoparticles are widely used as abrasives in CMP, with their physical structure and the surface content of Ce 3+ ions and oxygen vacancies directly affecting their CMP performance. Here in, we synthesized La/Pr/Nd doped CeO 2 with the porous self-assembled spherical structures. Doping with La/Pr/Nd reduced the grain size of cerium oxide, increased its specific surface area, decreased the pore size, and increased the pore volume. HR-TEM analysis shows that the porous self-assembled spherical CeO 2 primarily exposes the (111) crystal facet. Additionally, the density functional theory (DFT) calculation, XPS, H 2 -TPR and XANES analyses shown that doping of La/Pr/Nd facilitated the formation of oxygen vacancies and increased the Ce 3+ content on the (111) crystal facet of the CeO 2 . La atoms are more likely to stabilize on the CeO 2 (111) surface compared to Pr and Nd atoms. The CMP results indicated that, The La-CeO 2 exhibited a higher MRR of 338 ± 7.54 nm/min, which is a 35 % increase compared to p-CeO 2 , and achieved superior surface roughness ( Ra = 0.201 ± 0.010 nm).
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chaochao Tao,Songsong Ding,Shengqian Wang,Lin Liu,Houfa Mao,Genyuan Chen,Hualan Xu,Chongfeng Guo,Shengliang Zhong
Multicolor emission has long been a critical scientific challenge in the field of persistent luminescence (PersL) materials, with the achievement of multicolor PersL emission within a single host matrix representing a primary research objective. Herein, a new and effective method of using coordination polymers (CPs) as precursors is designed to synthesize multicolored CdSiO 3 :RE 3+ (RE = Pr, Sm, Eu, Tb, Tm) PersL materials. Through variation of rare earth dopants, we successfully achieved color-tunable PersL emission spanning brown, pink, purple, red, green, and blue spectra. The influence of RE 3+ dopants on the crystal structure, morphology and optical properties are studied in detail. Notably, this straightforward synthesis strategy enabled the effective production of nanospherical particles exhibiting regular morphology and uniform size distribution. The electronic band structure of the material was theoretically analyzed using density functional theory (DFT) calculations. Combined with thermoluminescence (TL) measurements were performed to elucidate the underlying PersL mechanism. To demonstrate practical applications, we designed a dynamic anti-counterfeiting pattern and evaluated the potential utility of CdSiO 3 :RE 3+ materials. This study not only enhances our fundamental understanding of CdSiO 3 -based PersL materials, but also provides novel insights into morphology and size control strategies that could be extended to other PersL material systems.
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 MOLECULAR STRUCTURE
·
2026
·
IF 4.9
Jiafeng Hu,Ying-ying Hu,Gui-an Yang,Xiao-qin Wu
A 3D Pr-MOF: {[Pr(NDC) 1.5 (DMF)(H 2 O)]·(H 2 O)(DMF)} n ( Pr-1 , H 2 NDC=2,6-naphthalenedicarboxylic acid; DMF= N ,N-dimethylformyl) was synthesized by solvothermal method. Pr-1 was studied by thermogravimetry, infrared and powder diffraction experimental methods. The experimental results showed that the chemical properties of Pr-1 were very good, and then Pr-1 was modified on a dry glassy carbon electrode (GCE) to prepare the Pr-1 /GCE sensor, which was applied to the detection of isomers of nitrobenzyl alcohol (NBA). Pr-1 /GCE has good electrochemical properties, and can clearly identify the electrochemical signal identified by NBA isomers. In the environment containing a variety of aromatic ring small molecule interference, Pr-1 can still identify NBA isomers, and has good selection characteristics and anti-interference characteristics.
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Zhihao Zhang,Shendan Zhang,Chunjie Jiang,Haichuan Guo,Fengdong Qu,Yuichi Shimakawa,Minghui Yang
Distinguishing toxic gases among the various volatile sulfur compounds (VSCs) is of significant practical value for atmospheric and environmental pollution monitoring, industrial monitoring, and even for medical diagnostics (where VSCs are indicators of diseases). The particular challenge lies in the detection and discrimination of sulfur-containing gases such as dimethyl disulfide (DMDS), methyl sulfide (DMS), hydrogen sulfide (H 2 S), and carbon disulfide (CS 2 ) is of value. Herein, single-phase perovskite-type LnFeO 3 nanoparticles were prepared by the citrate sol-gel method. Their gas sensing characteristics regard to the four typical VSCs were investigated. We found that the gas response of the p-type semiconductor LnFeO 3 gas sensors to the four typical VSCs are significantly different. In addition, the sensors offer high performance, good tolerance to environmental changes and long-term stability for detecting VSCs gas at an operating temperature of 210 °C. A new design of sensor array was realized by integrating a series of LnFeO 3 materials, which revealed excellent recognition ability for various VSCs, showing promise for real time monitoring.
研究领域:
材料科学
·
环境科学
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Yang Liu,Ping Gu,Yun Yang,Lin Jia,Mingdong Zhang,Guanghui Zhang
A novel integrated precipitation reactor (PR) and membrane separator (MS) system was developed for the removal of radioactive I − from simulated liquid waste. The PR-MS system was evaluated at the lab-scale, the I − removal efficiency reached approximately 97.0% and the concentration factor (CF) value was 1050 when the concentration of added Na 2 SO 3 was 40 mg/L and the CuCl dosage was 260 mg/L. The addition of Na 2 SO 3 played an important role in the removal of dissolved oxygen (DO) and the formation of CuI. These reactions, including the oxidation of SO 3 2− , the dissociation of CuCl, the disproportionation of Cu + , and the formation of CuI and Cu 2 O, occurred in the PR. Furthermore, the influence of the concentration of added CO 3 2− on copper removal was investigated, and solid-liquid separation and copper removal were simultaneously attained in the MS. The I − removal efficiency gradually decreased from 97.0% to 58.5% and the Cu 2+ concentration in the effluent decreased from 18.71 mg/L to 0.719 mg/L with the addition of CO 3 2− at a concentration that ranged from 0 to 80 mg/L. Experimental results show the PR-MS system is of great potential for industrial application on treatment of liquid waste contaminated with radioactive I − .
研究领域:
环境科学
·
核工程
✓ 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）