INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jiajun Feng,Yongxin Yu,Hongji Song,Zibo Chen,Yingxiang Zhu,Jiahui Liu,Jingtian Xie,Lianfen Chen,Junhao Li
A structural design strategy was employed to develop NaGd2Ga2InGe2O12:Sm3+ (NGGIG:Sm3+) garnet phosphors, optimizing the local coordination environment to enhance luminescence performance. By tailoring site occupation, Sm3+ ions were incorporated into an asymmetric crystal field, where a statistical probability model confirmed that ∼97% of Sm3+ ions reside in distorted coordination environments, promoting electric dipole(ED) transitions. The phosphors exhibit a high red-to-orange (R/O) intensity ratio of 2.97, contributing to enhanced red emission. CIE chromaticity coordinates of (0.61, 0.39) indicate a significant shift toward the red region, and the phosphors retain over 70% of their luminescence intensity at 400 K, demonstrating good thermal stability. These characteristics make NGGIG:Sm3+ a promising candidate for high-performance red phosphors in solid-state lighting applications, highlighting the effectiveness of site engineering in garnet structures for optimizing luminescence efficiency and stability.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xiaoli Luo,Wu Zhao,Qichen Chen,Mingfeng Zhi
As a matrix material, NaYbF 4 has attracted more and more attention due to its large absorption cross section and high energy transfer efficiency. In this study, lanthanide doped NaYbF 4 upconversion (UC) nano-/micro-crystalline was carefully synthesized by hydrothermal method . The influence of kinds of external conditions, including reaction time, initial reaction solution pH value, organic solvents codoping, and Na + concentration on crystalline phase, size, morphology and especially luminescent property are systematically studied and the possible formation mechanism based on PH values is emphatically proposed. The products of NaYbF 4 with various morphologies range from nanospheres , microprisms, microdisks, hexagonal crown-capped shapes, hexagonal clam-like shapes and hexagonal flower-like shapes were successfully prepared. The results show that the up-conversion luminescence property is positively correlated with the slenderness ratio. Solvents codoping and Na + concentration can greatly improve the luminescence property, especially for red emission. Impressively, the emission colors and intensities might be finely tuned through finely tuning the PH values, solvents co-doping and Na + dosage. Furthermore, this study will be expected to contribute to the synthesis of various morphologies and improving the UC intensity of lanthanide doped crystals.
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RSC Advances
·
2016
·Vol. 6
·期 55
·50173-50179
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IF 3.289
Song Li,Song Ye,Tianhua Liu,Zhuang Guo,Huiyun Wang,Deping Wang
ZnO quantum dots (QDs) with tunable size and photoluminescence can be achieved simply by controlling their growth during the sol–gel synthesis process. However, the role of alkali metal hydroxide MOH (M = Li, Na or K) as the reactant in the growth of ZnO QDs is still controversial. In this work, we carried out a comprehensive study on the growth of ZnO QDs by using different types of MOH as the reactant under different reaction temperatures and in different solvents. The results reveal that the growth of ZnO QDs is considerably governed by MOH through the co-effect of OH− and M+ ions, which can facilitate and hinder the growth, respectively. Further investigations suggest that the hindering effect caused by M+ cations is strongly dependent on the amount of OH− anions around the ZnO QD surface and follows the trend of Li+ > Na+ > K+. Moreover, the dual role of the reactant MOH can also be confirmed when altering reaction temperature and solvent. The photoluminescence of ZnO QDs shows size-dependence and can be easily tuned over a wide range from purple to yellow via adjusting the reaction parameters. This research establishes a fundamental understanding on the growth of ZnO QDs from the role of the reactant MOH point of view, which may benefit the controllable growth of ZnO QDs.
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ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Liye Li,Pengcheng Liu,Kongjun Zhu,Jing Wang,Guoan Tai,Jinsong Liu
With the wearable electronics progressing rapidly, the demand for flexible, long-life and low-cost electrodes of Li-ion batteries (LIBs) becomes more and more urgent. Due to the abundant resources and low cost, silica (SiO 2 ), especially the amorphous one, has attracted a lot of interests on the application of anode materials for LIBs. However, SiO 2 still suffer from the poor cycling performance mainly caused by the huge volume change during cycling like other alloy-type materials. Furthermore, it remains a challenge to fabricate the SiO 2 –based flexible electrode. Herein, we propose a facile in situ strategy to fabricate the electrospun robust free-standing SiO 2 /carbon nanofibers (denoted as in-SCNFs) film constructed by N-doped carbon nanofibers encapsulating uniformly amorphous SiO 2 nanoparticles . The in situ synthesized finer SiO 2 nanoparticles in the in-SCNFs are uniformly encapsulated in flexible carbon nanofibers, which can effectively buffer the volume change. Furthermore, the robust in-SCNFs film possesses the excellent mechanical flexibility and strength. So, when served as the free-standing anode of LIBs, the in-SCNFs film exhibits superior cycling performance. A discharge specific capacity of 405 mAh/g can be delivered even after a long-term 1000 cycles at a large current density of 500 mA/g, and the retention is up to 115%. It is an exciting finding that the in-SCNFs film is also a long-life anode of Na-ion batteries (NIBs). The 99% of initial capacity can be kept after 250 cycles at 500 mA/g. To our best knowledge, this is the first report on the application of SiO 2 /C composite for NIBs. These results suggest that the as-fabricated in-SCNFs film can become one promising free-standing long-life anode for LIBs and NIBs.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yu Yan,Mengmeng Shang,Shuai Huang,Yining Wang,Yixin Sun,Peipei Dang,Jun Lin
Near-infrared (NIR) phosphors are fascinating photoluminescence materials with applications in phosphor-converted light-emitting diodes (pc-LEDs) for night vision lighting, which are still restricted by low efficiency and thermal stability in the current research stage. In this work, AScSi2O6 (A = Na/Li) are chosen as hosts due to a larger band gap and a single octahedral site for Cr3+ doping. The NIR-emitting Cr3+-activated AScSi2O6:Cr3+ phosphors were successfully prepared by a common high-temperature solid-state method. X-ray diffraction and Rietveld refinement confirm that the Cr3+ prefers to enter the Sc3+-octahedral lattice site in the AScSi2O6 structure. Under blue light excitation, AScSi2O6:Cr3+ phosphors exhibit broadband NIR emission from 700 to 1100 nm with a full width at half-maximum of ∼150 nm owing to the 4T2 → 4A2 electron transition of Cr3+. The photoluminescence properties were enhanced by adjusting the fluxes and sintering conditions, and highly efficient LiScSi2O6:Cr3+ NIR phosphors with external quantum efficiencies of 33.4% were obtained. Moreover, the optimized LiScSi2O6:Cr3+ exhibits excellent thermal stability (75% at 150 °C) with an activation energy of 0.33 eV. Importantly, the fabricated NIR pc-LED with the highly efficient LiScSi2O6:Cr3+ phosphor demonstrates brighter NIR light and a higher luminous efficacy than the NaScSi2O6:Cr3+ phosphor in night vision.
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RENEWABLE ENERGY
·
2025
·
IF 9.1
Yu Zhang,Runzhe Li,Jingde Luan,Longde Jiang,Wengang Liu,Zheng Yan,Yu Bai
Photocatalytic hydrogen evolution from seawater splitting was a sustainable energy technology, alleviating the overuse of limited freshwater resources. The exogenous carbon was successfully doped into the framework of graphite carbon nitride via ultrasonic peeling and secondary calcination, replacing the bridging N atoms within the heptazine skeleton. This approach effectively regulated the chemical structure of g-C 3 N 4 , and the photocatalytic hydrogen yield of as-prepared CN-NA45 in water reached 7.15 mmolg −1 h −1 . In artificial seawater, the hydrogen yield of CN-NA45 increased to 10.80 mmolg −1 h −1 , which was attributed to the larger specific surface area, reduced band gap and more negative band edge. The presence of bridging carbon facilitated the transfer of electrons from the heptazine ring to the region near the bridging position, enhancing the local delocalization of π electrons. In artificial seawater, the adsorption of Na + ions on the catalyst surface were superior to other ions, facilitating the electron enrichment and providing more electrons for the photocatalytic reduction reaction. This work provided an insight into the construction of photocatalytic materials for marine environmental applications and the impact of electrolyte ions on hydrogen evolution performance.
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Journal of Energy Storage
·
2025
·
IF 9.8
Qianqian Zhang,Yaru Zhu,Min Yang,Yanru Zhang,Jialin Wang,Shanshan Liu,Ye Liu,Xin Yang,Kai Feng,Wenzuo Li
Aqueous zinc-ion batteries (AZIBs) have good application prospects in the field of large-scale energy storage. The design and synthesis of high-performance cathode materials are key to promoting the development and application of AZIBs. In this work, the combination of redox active V 4+ cation and HPO 3 2− anion provides excellent zinc-ion (de)intercalation ability. In addition, HPO 3 2− and C 2 O 4 2− anion groups collaborate to construct a stable framework with multi-dimensional zinc-ion transport channels, providing fast and robust pathway for zinc-ion transport. Carbon composites further improve electronic conductivity, shorten ion transport distance, and increase the electrochemical reaction area of Na 2 [(VO) 2 (HPO 3 ) 2 (C 2 O 4 )]·2H 2 O@C (NVPCO@C) cathode material. As a result, NVPCO@C cathode material delivers a high specific capacity over 180 mAh·g −1 at a current density of 40 mA·g −1 . Moreover, NVPCO@30%C cathode material maintains 100 % capacity after 100 cycles. Ex-situ X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectra confirm the electrochemical activity of V 4+ /HPO 3 2− ions and reveal the zinc-ion storage mechanism.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Qiang Liu,Yan-Jiang Liu,Hao-Tian Tong,Shi-Xiao Wei,Ting-Liang Xie,Shuang-Feng Yin
Co-free manganese-based Prussian blue analogues (Mn-PBAs) have emerged as exceptionally promising cathode materials for sodium-ion batteries (SIBs), offering low cost and high specific capacity. However, the detrimental Jahn-Teller effect, compounded by sluggish Na + diffusion kinetics and inherently poor electrical conductivity, severely undermines structural stability and cycling performance. Herein, we pioneer a novel Co-free entropy regulation strategy to overcome these formidable challenges. Four distinct Co-free PBAs with precisely controlled (configuration entropy (Δ S conf ) were meticulously synthesized via a straightforward co-precipitation method. Comprehensive electrochemical diagnostics combined with rigorous density functional theory (DFT) simulations unequivocally reveal that elevating Δ S conf demonstrably accelerates Na + diffusion, significantly enhances electrical conductivity, and effectively suppresses Jahn-Teller distortion. In situ X-ray diffraction (XRD) and in situ Raman spectroscopy analyses vividly characterized the structural transitions occurring during sodiation/desodiation, demonstrating markedly improved structural reversibility with increasing Δ S conf . Consequently, the Co-free high-entropy (HE) PBA cathode delivers truly remarkable cycling stability, (retaining 62.3 % capacity after an astounding 10 000 cycles at 5 000 mA g −1 , alongside exceptional rate capability of 75.1 mAh g −1 at 5 000 mA g −1 ). These groundbreaking findings provide profound insight for designing future high-performance cathode materials from abundant, environmentally friendly elements for next-generation SIBs.
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ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2015
·Vol. 641
·期 5
·911-916
·
IF 1.16
Fugang Li,Wenyuan Zhao,Sitong Chen,Tonglai Zhang,Zunning Zhou,Li Yang
Two nitrogen-rich alkali metal salts based on nitrogen-rich anion [Zn(bta) 2 ] 2– : {[Na 2 Zn(bta) 2 (H 2 O) 8 ] · H 2 O} n ( 1 ) and {[K 2 Zn(bta) 2 (H 2 O) 4 ]} n ( 2 ) were synthesized by reactions of alkali hydroxide, N , N -bis(1 H -tetrazol-5-yl)amine (H 2 bta), and zinc chloride in aqueous solutions. The crystal structures of 1 and 2 were determined by low temperature single-crystal X-ray diffraction and fully characterized by elemental analysis and FT-IR spectroscopy. The structures demonstrate that an infinite 1-dimensional (1D) chain structure is constructed by Na + ions and bridging water molecules in compound 1 , which is connected by extensive hydrogen bonds forming a complex 3D network, whereas compound 2 features a more complicated 3D metal-organic framework (MOF). The thermal behaviors of 1 and 2 were investigated by differential scanning calorimetry (DSC) measurements. The DSC results illustrate that both compounds exhibit high thermal stabilities (decomposition temperature > 345 °C). In addition, the heats of formation were calculated on the basis of the experimental constant-volume energies of combustion measured by using bomb calorimetry. Lastly, the sensitivities towards impact and friction were assessed according to Bundesamt für Materialforschung (BAM) standard methods.
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JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Biao Xu,Zihao Xu,Chunyu Li,Jian Peng,Xingyu Li,Wubin Dai
Phosphor with thermally stable and highly efficient photoluminescence (PL) is a premise/challenge for use in high-quality phosphor-converted light-emitting diodes (pc-LEDs). Herein, via a facile solid-phase sintering method in air, a negative thermal quenching (TQ) blue emitting SrGa 2 B 2 O 7 (SGB): Bi is reported, mainly associating with the underlying collaborative effect of negative volumetric thermal expansion of rigid host, heterovalent substitution (Bi 3+ → Sr 2+ )-induced V Sr /V O vacancies, and generating self-reduction ions (Bi 2+ ). For charge balance under the condition of temperature rising, both opposite process of self-oxidation (Bi 2+ to Bi 3+ ) and charge release from trap levels can compensate blue-PL loss. This phosphor is comparable to Eu 2+ /Ce 3+ -activated blue-emitting phosphors, and even boasts superior quantum efficiency (QE) and thermal stability. Via artificially codoping Na + for charge compensation, the QE of the SGB:Bi/Na can be further significantly enhanced. Color-tunable PL is achieved via cascade-connected energy transfer (ET) from Bi 3+ to Tb 3+ (green)/Eu 3+ (red) in SGB: Bi/Na/Tb/Eu that possesses high QE/stability than the case of blue/green/red tricolor phosphor blends adopted in warm white LEDs (wLEDs). Finally, the SGB: Bi/Na and SGB: Bi/Tb/Eu/Na are respectively, encapsulated with distinct encapsulants via either traditional or remote “capping” packaging strategy to form blue LEDs and wLEDs, showcasing splendid electroluminescence behaviors and luciferous application prospects.
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Food Packaging and Shelf Life
·
2026
·
IF 10.8
Hongkai Xie,Yinlei Mao,Xinhao Wan,Hailu Liao,Chunhao An,Fengjiao Fan,Tao Zhang,Yinji Chen
Aggregated carbon dots exhibit weak antibacterial and antioxidant activities, limiting their application in packaging systems. Metal doping is an effective strategy to enhance their performance. Herein, Na-doped rice bran carbon dots (Na-RBCDs) were synthesized hydrothermally from rice bran and NaOH. A pH-sensitive bilayer film was fabricated via layer-by-layer casting, comprising an outer gelatin layer containing Na-RBCDs and an inner chitosan layer loaded with shikonin for indication/sustained release. Optimal antioxidant and antibacterial activities of Na-RBCDs were achieved at a 10:1 rice bran/NaOH mass ratio, and they exhibited no cytotoxicity toward HaCaT cells below 2 mg/mL. Scanning electron microscopy confirmed their uniform dispersion within the film matrix, ensuring a smooth surface and strong interlayer adhesion. Fourier transform infrared spectroscopy and thermogravimetric analysis indicated that Na-RBCDs formed hydrogen bonds with the polymer matrix, thereby improving the film’s thermal stability. Incorporating 5% Na-RBCDs enhanced UV-blocking ability, hydrophilicity (water contact angle >75°), and tensile strength (1.7-fold increase). The film demonstrated effective sustained release of both active components, alongside improved antioxidant, antibacterial, and pH-responsive colorimetric properties. When applied to refrigerated salmon, the film containing 5% Na-RBCDs extended the shelf life from 3 to 9 days by enhancing chemical and microbial stability. A pronounced color change was observed between days 9 and 12 (ΔE from 15.7 to 30.6), demonstrating its ability to monitor salmon freshness. This gelatin/chitosan-based intelligent active packaging system shows promising applicability for muscle food preservation and freshness monitoring. Further research is needed to establish a precise correlation between colorimetric response and specific spoilage indicators.
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FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Min Zhang,Yaqi Hou,Shuqin Xia,Khizar Hayat,Di Hua,Heping Cui,Jingyang Yu,Shahzad Hussain
Nowadays, modulating microstructure of matrix to achieve salt reduction on diverse food have attract widespread attention. Our previous study found that the spatial site resistance effect of oil droplets attenuated the inhomogeneous distribution of Na + in microwave processing, which was detrimental to the enhancement of saltiness perception. This study promoted the extent of inhomogeneous Na + distribution by 39.79 % through regulating interfacial protein aggregation pattern. The protein aggregation pattern is mainly accomplished through the regulation of hydrophobic interaction and disulfide bonding of interfacial proteins by octenyl succinic anhydride and reduced glutathione, respectively. The results showed that droplet and interfacial tension of myofibrillar protein (MP) increased significantly, while the fluorescence intensity of hydrophobic groups decreased with the increase of hydrophobic interactions regulation. However, regulation of disulfide bonds conducive to the exposure of more hydrophobic amino acids and rapid adsorption of MPs at the oil-water interface to form more stable droplets. The unstable droplets regulated by hydrophobic interactions inhibited the inhomogeneous distribution of Na + in gel matrix, whereas the regulation of disulfide bonds promoted the inhomogeneous distribution of Na + . This work is expected to give some insights into the development of emulsified salt-reduced meat products by microwave processing.
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