CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 42
·10092-10099
·
IF 5.317
Jing Zhang,Qing Tang,Zhong-Zheng Gao,Sheng-Chao Qiu,Ying Huang,Zhu Tao
Graphical Uniquely responsive : The interaction of thiazole orange (TO) with twisted cucurbit[14]uril ( t Q[14]) was investigated, and formation of a stable fluorescent t Q[14]/TO complex was observed. The t Q[14]/TO complex exhibited unique fluorescence responses to Hg 2+ , Ba 2+ , and Pb 2+ cations in different aqueous media (see figure). Thus, a fluorescent sensor for three heavy-metal ions was developed. A water-soluble fluorescent sensor based on the interaction of twisted cucurbit[14]uril ( t Q[14]) and thiazole orange (TO) in aqueous solution was developed. Formation of the t Q[14]/TO complex gives rise to stronger fluorescence in both neutral and acidic aqueous solutions compared with that of free TO. Further experiments on the interaction of the t Q[14]/TO complex with metal ions revealed that, from a series of nineteen selected common metal ions, 1) only Hg 2+ can lead to fluorescence enhancement and then quenching of the t Q[14]/TO (2:1) complex in neutral aqueous solution; 2) only Ba 2+ can induce fluorescence quenching of the t Q[14]/TO (2:1) complex in aqueous HCl solution (pH 2); furthermore, the t Q[14]/TO/Ba 2+ systems exhibit reversible changes in fluorescent intensity on successively adding SO 4 2− and Ba 2+ ; and 3) only Ba 2+ or Pb 2+ can induce fluorescence quenching of the t Q[14]/TO (15:1) complex in aqueous HCl solution (pH 2). Thus, the t Q[14]/TO complex can act as a supramolecular fluorescence-based sensor for the determination of Hg 2+ , Ba 2+ , and Pb 2+ ions.
研究领域:
化学
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分析化学
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超分子化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 23
·1-6
·
IF 2.8
Shi Xiaofei,Wang Xi,Wang Lei,Tang Xiaoli,Su Hua,Lizhong Song
This study modified the Co 1.1 Zn 0.9 TiO 4 ceramic system through Ba 2 ⁺ ion doping to enhance the quality factor ( Q×f ) and adjust the τ f value. Ceramic samples were prepared via the solid-state reaction method at sintering temperatures of 1125–1200°C. XRD revealed that at low Ba doping concentrations ( x = 0–0.01), Ba 2 ⁺ could partially substitute Zn 2 ⁺, maintaining the cubic spinel main phase (Co 2 TiO 4 ) structure; when x ≥ 0.02, the larger ionic radius of Ba 2 ⁺ induced phase separation and the formation of a secondary BaTiO 3 phase, with the secondary-phase peak intensity increasing with doping concentration. The coexistence of main and secondary phases in the Co 1.1 Zn 0 .87Ba 0 .03TiO 4 ceramic was confirmed by Rietveld refinement. SEM demonstrated that appropriate Ba doping ( x = 0.01–0.03) promoted grain growth, while excessive Ba doping ( x = 0.04) led to microstructural deterioration. The Q×f value of the Co 1.1 Zn 0 .87Ba 0 .03TiO 4 ceramic increased to 66,943.2 GHz, while the τ f value was adjusted to −17.13 ppm/°C, effectively reducing dielectric loss and enhancing temperature stability.
研究领域:
材料科学
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无机非金属材料
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功能陶瓷
·
介电物理
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电子材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 52
·期 1
·1318-1326
·
IF 5.6
Xinhao Song,Sha Wu,Ni Wang,Tongliang Liang,Yu Guo,Changzheng Hu,Laijun Liu,Liang Fang
Tetracycline hydrochloride (TCH), as a widely used antibiotic, poses an increasingly serious environmental residue problem, necessitating the development of efficient and environmentally friendly degradation technologies. Herein, a series of tungsten bronze-structured Ba 2-x Sr 3+x NdNb 7 Ti 3 O 30 (BSNNT, x = 0, 0.2, 0.4, 0.6) submicron powders was prepared using high-temperature solid-state sintering. The performance and mechanism of tribocatalytic degradation of TCH were systematically investigated. The results indicated that as the Sr 2+ doping concentration increased, the lattice distortion of BSNNT worsened, and its ferroelectric properties considerably improved. The sample with x = 0.6 demonstrated the best performance, with a residual polarization (P r ) of 1.946 μC/cm 2 and a TCH degradation rate reaching 93.67 % within 120 min. Further introduction of metal coatings (Ni, Cu, and Zn) revealed that Zn coating considerably promoted the generation of active material, achieving a degradation rate of 97.86 % within 60 min. Electrochemical impedance spectroscopy, electron paramagnetic resonance, and fluorescence spectroscopy confirmed that •OH, •O 2 − , and h + were the primary active species in the catalytic reaction and that the Zn coating stabilized radical generation. Furthermore, cycling stability tests showed that the BSNNT (x = 0.6) catalyst maintained a degradation efficiency of 94 % after five cycles, demonstrating excellent stability and practical application potential. This study provided new insights into the application of ferroelectric materials in the degradation of environmental pollutants and laid a theoretical foundation for the development of efficient and environmentally friendly TCH treatment technologies.
研究领域:
环境科学
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材料化学
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催化
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铁电材料
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污染物降解
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Min Zhu,Xiaonan Chen,Jiacheng Cao,Zhiping Wan,Hongyu Cao
The high-temperature thermoelectric properties of Ba 2-x La x CaMoO 6-δ (x = 0, 0.05, 0.1, 0.15, 0.2) double perovskites were systematically investigated and reported for the first time. Through solid-state synthesis, phase-pure cubic double-perovskite oxides with the general formula Ba 2-x La x CaMoO 6-δ (0 ≤ x ≤ 0.2) were successfully synthesized. Comprehensive characterization techniques including powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses demonstrated the effective incorporation of La 3+ ions into the crystal lattice, forming a homogeneous substitutional solid solution within the molybdate-based matrix. Notably, the structural integrity of the double-perovskite framework was maintained throughout the doping series, as evidenced by Rietveld refinement of the XRD patterns. The temperature-dependent charge transport properties were analyzed to correlate La 3+ substitution levels with thermoelectric performance. In the 323–1073 K range, La doping significantly reduces total thermal conductivity, which remains very low due to high atomic density and strong structural disorder. At 1073 K, Ba 1.9 La 0.1 CaMoO 6-δ achieves a thermal conductivity of 1.32 W m −1 K −1 and a Seebeck coefficient of 282.7 μV/K. These findings suggest that if effective optimization strategies are implemented to reduce resistivity, this molybdate-based materials could become promising candidates for efficient thermoelectric generators in industrial waste heat recovery systems or for stable energy conversion in next-generation aerospace power devices, where high temperature stability and low thermal conductivity are essential.
研究领域:
材料科学
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热电学
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无机化学
·
能量转换
·
固体物理
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 5
·2607-2618
·
IF 2.779
Gao Zhihua,Fu Fengyan,Niu Lili,Jin M.
In the recent years, luminescent phosphor materials have contributed much to reduce the serious environmental problems such as environmental pollution, greenhouse effect, and energy crisis, but most of them commercially used for fabricating white LEDs are rare earth (RE) ions doped materials. Here, the non-RE Bi 3+ -doped Ba 2 (Y,Sc)NbO 6 solid solution nanocrystals are prepared using a high temperature solid state route followed by a ball milling and griddle selection. Our experiments show that when the Y 3+ ions are replaced by the Sc 3+ ions, the obtained solid solution nanocrystals show a shift of X-ray reflection positions to higher angle, and the emission peaks from blue to blue-green. At the same time, a 1.35 time of PL intensity enhancement under 365 nm excitation is achieved in the Ba 2 (Y 0.58 ,Sc 0.4 )NbO 6 :0.02Bi sample when compared to the Ba 2 Y 0.98 NbO 6 :0.02Bi sample. In addition, this optimal sample shows the quantum efficiency of 76% and good thermal stability with T 50% value of 205 °C. By depositing the Ba 2 (Y 0.58 ,Sc 0.4 )NbO 6 :0.02Bi and commercial red Sr 2 Si 5 N 8 :Eu 2+ phosphors on a 365 nm UV LED chip at a driving current of 30 mA, a white LED device, with a CIE coordinates at (0.364, 0.379), a high color rendering index of 76.8 and luminous efficiency of 67 lm, and a low color temperature of 3469 K, is achieved.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xinzhe Zhou,Li Guan,Huanrong Li
The white LEDs with high performance and excellent luminous quality is of high importance for developing the current lighting industry, and high thermally stable blue phosphors play a critical role in the preparation of white LEDs. Herein, we reported a facile way to obtain highly efficient blue Eu 2+ -doped celsian phosphor with excellent thermal stability by a phase transformation of Ba 2+ -exchanged SOD Zeolite strategy. The structure of phosphors changed from nepheline to celsian with the doping of Ba 2+ , and the maximum emission intensity blue-shifts from 550 nm to 450 nm under the excitation of 370 nm. The PLQY is determined to be 56 %, 96 % and 82 % for the phosphor with Ba 2+ doping concentration being 0, 1.49 and 1.86, respectively, and the luminescence intensity at 423 K is can be 80 %, 102 % and 93 % of its intensity at room temperature. Finally, the package of the LED device based on our yellow and blue phosphors together with the commercial red CaAlSiN 3 :Eu 2+ phosphor is constructed to show warm white light with the CCT of 3705 K and a high CRI of 97.7. This study provides a facile way for obtaining satisfactory phosphors for high-quality lighting.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2026
·
IF 4.9
Yingfang Li,Long Tian,Qingzhe Wu,Xiaohuan Long,Hai Wu,Chaoyong Deng,Weichao Huang
Mn 4+ -doped oxide phosphors with deep-red emission show significant application potential in plant-growth LEDs. In this study, double perovskite Ba 2- x Sr x GdSbO 6 : Mn 4+ deep-red phosphors were developed via a cation substitution strategy. The crystal structure, optical properties, and thermal stability of the phosphors were investigated in detail. The as-prepared phosphors showed an intense deep-red emission band around 625–750 nm. Cationic substitution with Sr 2+ significantly improved the luminescence performance of the Ba 2 GdSbO 6 : Mn 4+ phosphors, and the optimized sample BaSrGdSbO 6 : Mn 4+ was obtained, achieving a nearly 12-fold enhancement in emission intensity. Furthermore, the electroluminescence (EL) spectrum of the prototype LED device fabricated based on the BaSrGdSbO 6 : Mn 4+ phosphor is matched well with the absorption band of plant pigments. These findings demonstrate that the BaSrGdSbO 6 : Mn 4+ phosphors have potential applications in plant-growth LEDs, and also provide some guiding inspirations in the exploration of novel Mn 4+ -doped double perovskite phosphors.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Jing Li,Wenyu Xie,Rong Shao,Xionghua Ju,Hongbo Li
The development of cost-effective and highly sensitive SO 2 sensors is an urgent task since SO 2 causes worldwide serious environmental security and human diseases. Herein, a first photoelectrochemical (PEC) sensing platform for SO 2 was constructed based on Ba 2+ doped amorphous TiO 2 hollow spheres. They were successfully prepared by SiO 2 template method before in situ Ba 2+ ions exchanging and doping. Before assay, SO 2 was oxidized by hydrogen peroxide and generated H 2 SO 4 , which was further neutralized by NaOH resulting in the generation of Na 2 SO 4 . When it reacted with Ba 2+ -doped TiO 2 hollow spheres, the produced BaSO 4 nanoparticles leaded to the photocurrent remarkably decreased due to the photo-induced electron pathways shut down. The fabricated PEC sensor was linear with the concentration of SO 4 2− in the range from 1 to 4000 pmol L −1 with a detection limit of 0.4 pmol L −1 . The other conventional species did not interfere in the detection of SO 4 2− in aqueous system and the fabricated PEC sensor was successfully applied in monitoring of SO 2 in industry waste gas. It demonstrated good performance including wide dynamic linear range, high selectivity, ultrasensitivity, excellent stability and low cost. This strategy paves a new way for other similar air pollutants.
研究领域:
环境科学
·
材料科学
·
分析化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Yang Liu,Feng-Qi Shi,Xin Hao,Meng-Yu Li,Lin Cheng,Cheng Wang,Kai-Yao Wang
Efficient adsorption of radioactive 137 Cs + and 60 Co 2+ and their decay products 137 Ba 2+ and 60 Ni 2+ bears significance for hazard elimination in case of nuclear emergency, which relies on the adsorption rate enhancement that takes advantages of compositional and structural optimization. Herein, we report a zinc-doped selenidostannate constructed from T2-supertetrahedral clusters, namely K 3.4 (CH 3 NH 3 ) 0.45 (NH 4 ) 0.15 Zn 2 Sn 3 Se 10 ·3.4 H 2 O ( ZnSnSe‐1K ). The soft Se and micro-porosity synergistically endow this material with a binding affinity to Cs + , Ba 2+ , Co 2+ , and Ni 2+ ions and ultrafast kinetics with R > 97.6% in 2–60 min. In particular, ZnSnSe‐1K can remove 99.34% of Cs + in 2 min ( K d Cs > 1.5 × 10 5 mL g −1 ), contributing to a record rate constant k 2 of 9.240 g mg −1 min −1 that surpasses all metal chalcogenide adsorbents. ZnSnSe‐1K exhibits good acid/base tolerance (pH = 0–12), and the adsorption capacities at neutral are 253.61 ± 9.15, 108.94 ± 25.32, 45.76 ± 14.19 and 38.49 ± 2.99 mg g −1 for Cs + , Ba 2+ , Co 2+ , and Ni 2+ , respectively. The adsorption performances resist well co-existing cations and anions, and the removal rates can keep above or close to 90% even in sea water. ZnSnSe‐1K is employed in continuous column and membrane filtration, both of which shows excellent elimination efficiency ( R > 99%) for mixed Cs + , Ba 2+ , Co 2+ , and Ni 2+ . Especially, the membrane with an ultrathin (70 µm) ZnSnSe‐1K layer can remove 97–100% Cs + in suction filtration with a short contact time of 0.33 s. Combined with the simple synthesis, facile elution and great irradiation resistance, ZnSnSe‐1K emerges as a selenide adsorbent candidate for use in environmental remediation especially that involving nuclear waste disposal .
研究领域:
材料科学
·
环境科学
·
放射性废物管理
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Jie Yang,Huan Zhou,Jie Li,Cunbing Xu,Yifan Li,Sifan Wang,Jiangbo Chen
The solid–liquid phase equilibria of the Ba2+//Cl–, S2–, and OH––H2O quaternary system and its three subternary systems at 298.15 K are studied via the isothermal solubility phase equilibrium method. The solubility data, liquid properties of density and pH, and phase diagrams of the ternary and quaternary systems are obtained. Solid species of Ba(OH)2·8H2O, BaCl2·2H2O, Ba(OH)Cl·2H2O, and BaS exist in the quaternary system and corresponding ternary systems at 298.15 K. The four solid species build up two invariant points, one disproportionate and one proportionate, and four phase regions. The largest phase area is covered by Ba(OH)·8H2O, and the lowest water point is the proportionate invariant point saturated by BaCl2·2H2O, Ba(OH)Cl·2H2O, and BaS.
研究领域:
化学
·
材料科学
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DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2026
·
IF 3.3
Qing Song,Wanjun Zhang,Qingguo Chen,Rui Ma,Wei Xu,Sultan Mehmood,Liang Bian,Xiaofeng Zhao
Precipitation enrichment coupled with ceramic solidification represents a technically viable and promising engineering approach for volume reduction and immobilization of high-level radioactive waste. Rhabdophane has been proposed as a candidate host phase for immobilizing actinides from high-level liquid waste (HLLW). However, the wet-chemical co-precipitation mechanism governing the simultaneous incorporation of tetravalent actinides and divalent charge-compensating cations remains incompletely understood. This knowledge gap is particularly relevant because Ba 2+ is a major product in HLLW generated from commercial nuclear power reactors. In this study, we investigate the Ba 2+ /Th 4+ co-incorporation behavior and solubility limits in La 1–2 x Th x Ba x PO 4 ·nH 2 O rhabdophane synthesized at pH=1 and 90 °C. Our results suggest that an excess of Ba 2+ is required to stabilize a single-phase rhabdophane, with an optimal Ba:Th ratio of 5. Combined structural, spectroscopic, and microscopic analyses confirm effective substitution of Ba 2+ and Th 4+ at La 3+ lattice sites for x ≤ 0.05. Higher doping levels lead to the crystallization of rhabdophane with nonstoichiometric compositions, accompanied by Ba 2+ vacancy defects. Over 99% of Th 4+ in 0.05 mol/L solution was removed within 12 h. Upon thermal treatment, the as-synthesized rhabdophane powders can be converted into dense monazite ceramics at 1250 °C.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jingyang Zhou,Ningning He,Pan He,Yang Li,Lijian Ma
The “two-in-one” strategy has been widely adopted for constructing diverse covalent organic frameworks (COFs) due to its excellent solvent adaptability. However, its reliance on simple single component reactions limits access to COFs with higher complexity and functionality. Herein, we integrated multicomponent reactions (MCRs) with the “two-in-one” strategy for the first time, fabricating three dual-linkage COFs (TAPQ-COF, 2,3-DHTAPQ-COF, and 2,5-DHTAPQ-COF) featuring compressed hexagonal pore structures. The concurrent presence of imine and imidazole linkages in the COF skeletons induced distinct crystallization pathways compared to counterparts with single linkage. Crucially, hydrogen bonding was found to modulate final crystallinity by influencing crystallization pathways. When applied to Ba 2+ /Pb 2+ separation—simulating the isolation of medical radionuclide 212 Pb from 224 Ra/ 212 Pb or 228 Ra/ 212 Pb generators—the isomeric 2,3-DHTAPQ-COF significantly outperformed 2,5-DHTAPQ-COF in adsorption performance. 2,3-DHTAPQ-COF exhibited exceptional selectivity for Pb 2+ (separation coefficient β Pb/Ba up to 54.2). Experimental and theoretical evidence revealed that the enhanced selectivity originates from the enhanced coordination ability of ortho-hydroxyl groups. This work ingeniously merges MCRs with the “two-in-one” strategy, expanding the structural diversity of COFs accessible through simplified synthesis and broadening the scope of MCR applications. The superior Ba 2+ /Pb 2+ separation capability of 2,3-DHTAPQ-COF provides new insights for designing COFs targeting medical radionuclide purification.
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高影响因子
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