RSC Advances
·
2016
·Vol. 6
·期 55
·50173-50179
·
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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高影响因子
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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高影响因子
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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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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高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 33
·11555-11561
·
IF 4.39
Jinhui Wang,Xinyuan Zhang,Fei Liang,Zhanggui Hu,Yicheng Wu
Birefringent crystals with strong anisotropy are important components in modern optical devices. The newly discovered planar π-conjugated cyanurate group (HxC3N3O3)x−3 (x = 0–3) has been demonstrated as an effective functional motif for improving birefringence in the ultraviolet region. Here, single co-crystals of alkali halide cyanurates, RbBr·(H3C3N3O3) (I), RbI·(H3C3N3O3) (II), and CsBr·(H3C3N3O3) (III) were synthesized by the ethanol solution method, and NaBr·(H3C3N3O3) (IV) was obtained via the solvent-drop grinding method. These four co-crystals feature a planar (H3C3N3O3) arrangement and exhibit wide band gaps (> 4.90 eV), tunable birefringence (Δnexp ∼ 0.124–0.256), and high thermal stability (156 °C–349 °C). In addition, first principles calculations were also carried out to evaluate the relationship between molecule density, spatial arrangement and optical birefringence, and suggested a great tailoring effect of the alkali metal and halogen species on regulating the optical anisotropy of co-crystal cyanurates.
研究领域:
材料科学
·
晶体工程
·
光学材料
·
无机化学
·
功能材料
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高影响因子
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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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Dong Yi,Jiawei Fu,Fenzhong Long,Jin Han,Fangui Meng,Xinmin Zhang
To improve the quality of white LED and develop plant growth lighting, considerable efforts have been devoted to investigating red phosphor. Eu 3+ -activated phosphors are well-known red-emitting components due to their 5 D 0 - 7 F 1,2 transitions in various applications. It is also found that its 5 D 0 - 7 F 4 transition in the range of far-red wavelengths has potential applications in the fields of daily and agricultural lighting. In this study, two kinds of Eu 3+ -doped layered perovskite La 2 Ti 2 O 7 and A 2 La 2 Ti 3 O 10 (A = Li, Na, K) phosphors were synthesized by the solid-state method. The crystal structure, absorption, excitation, and emission spectra of all the samples were investigated in detail. Dissimilar luminescent behaviors of the studied samples were observed. Due to the different crystal structure and chemical composition of the host matrix, each compound exhibits a different emission spectrum. Specifically, Eu 3+ occupies a lower symmetric La 3+ site in A 2 La 2 Ti 3 O 10 (A = Li, Na, K) phosphors, resulting in an intense 5 D 0 - 7 F 4 far-red emission, while in La 2 Ti 2 O 7 :Eu 3+ , Eu 3+ gives a weak 5 D 0 - 7 F 4 emission. To the best of our knowledge, this is the first report that Eu 3+ exhibits a strong 5 D 0 - 7 F 4 far-red emission in the titanate host lattices with perovskite structure. Besides, A 2 La 2 Ti 3 O 10 :Eu 3+ (A = Li, Na, K) phosphors achieve higher photoluminescence efficiency than La 2 Ti 2 O 7 :Eu 3+ . Among them, the internal quantum efficiency of the optimized Li 2 La 2 Ti 3 O 10 :1.2Eu 3+ is about 84.7 %, and it has a better thermal stability (80 % at 125 °C). Furthermore, good photoelectric performances of red/white-LEDs fabricated by utilizing the representative Li 2 La 2 Ti 3 O 10 :1.2Eu 3+ as red/far-red components indicate that it has potential applications in indoor/outdoor lighting and plant growth lighting. This study provides a feasible way for developing efficient Eu 3+ -activated far-red optical materials.
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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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PubMed
高影响因子
Advanced Science
·
2020
·Vol. 7
·期 18
·1903045
·
IF 15.84
Zhe Cui,Shu-Ang He,Qian Liu,Guoqiang Guan,Wenlong Zhang,Chaoting Xu,Jinqi Zhu,Ping Feng,Junqing Hu,Rujia Zou,Meifang Zhu
SnS, is a promising anode material for lithium ion batteries (LIBs) and sodium ion batteries (SIBs), however, undergoes poor cyclic lifespan due to its huge volume changes and bad electroconductivity. Here, a modified CVD method is used to directly grow graphene-like carbon film on the surface of SnS nanosheet arrays which are supported by Co-, N-modified porous carbon fibers (CCF@SnS@G). In the strategy, the SnS nanosheet arrays confined into the integrated carbon matrix containing porous carbon fibers and graphene-like carbon film, perform a greatly improved electrochemical performance. In situ TEM experiments reveal that the vertical graphene-like carbon film can not only protect the SnS nanosheet from destruction well and enhance the conductivity, but also transforms SnS nanosheet into ultrafine nanoparticles to promote the electrochemical kinetics. Systematic electrochemical investigations exhibit that the CCF@SnS@G electrode delivers a stable reversible capacity of 529 mAh g −1 at a high current density of 5 A g −1 for LIBs and 541.4 mAh g −1 at 2 A g −1 for SIBs, suggesting its good potential for anode electrodes.
研究领域:
材料科学
·
电化学
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高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Leyan Nian,Kui Wu,Guijie He,Zhihua Yang,Shilie Pan
In the exploration of new infrared nonlinear optical (IR NLO) materials, element substitution has been developed as an effective way to adjust the structural features and material performances. A series of new IR NLO materials have been discovered in the I–Ba–MIV–Q system (I = Li, Na, Cu, and Ag; MIV = Si, Ge, and Sn; Q = S and Se), and they undergo interesting structural transformation with different element substitution except Li analogues. Herein, we have successfully synthesized three selenides with different space groups (Ag2BaSiSe4: I4̅2m; Ag2BaGeSe4 and Ag2BaSnSe4: I222) in the above system and studied their properties through experimental and theoretical methods. Remarkably, the detailed analysis on the structural changes and properties comparison was also systematically investigated in the I–Ba–MIV–Q system and the results indicate that the distortion degrees of different IQ4 tetrahedra play the critical role to cause the structural transformation with the M or Q elements substitution. More importantly, we have also found that the structural changes have the close relationship with the distance d(I–I) between adjacent I cations in the I2BaSnSe4 system, which makes the four-membered rings formed by edge-sharing BaSe8 units change from the square to rhombus with the increase of d(I–I). The properties comparisons (band gap and NLO effect) in this system have been also systematically studied.
研究领域:
材料科学
·
无机化学
·
光学材料
·
固态化学
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高影响因子
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