Journal of Materials Chemistry C
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2018
·Vol. 6
·期 20
·5453-5461
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IF 5.976
Shaohua Fan,Guojun Gao,Shiyu Sun,Sijun Fan,Hongtao Sun,Lili Hu
Absolute quantum efficiency (QE) of up-conversion (UC) materials is still limited to ∼3%, which strongly limits their applications in many areas. Herein, we report highly efficient UC β-NaYF4:Yb3+,Er3+ micro-cylinders prepared via a newly developed Li+/Na+ ion exchange method (IEM) with absolute QE as high as ∼4.0%. A small amount of Li+ is interstitially incorporated in β-NaYF4:Yb3+,Er3+, which not only maintains well the micro-cylindrical morphology but also enhances the emission intensity by ∼40%, doubles absolute UCQE (∼3.0% under a fixed excitation power density of 15 W cm−2), and prolongs the lifetime. The UC excitation profile is composed of a sharp peak at 976 nm and a weak shoulder at 935 nm. The absolute UCQE of Li+/Na+ IEM β-NaYF4:Yb3+,Er3+ is systemically studied over a wide excitation power density of 0.4–100 W cm−2, and we obtained impressively high UCQE of 4.0% under 60 W cm−2 power density, which is among the highest values in the literature. The application of two green UC emissions of Li+/Na+ IEM β-NaYF4:Yb3+,Er3+ in ratiometric thermometers is successfully demonstrated. The high relative temperature sensitivity (SR) of 1113/T2 and excellent repeatability as indicated by three heating–cooling cycles (293–753 K) suggest their promising application as a temperature sensor.
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ADVANCED POWDER TECHNOLOGY
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2014
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IF 1.642
Renping Cao,Kangbin Chen,Qianglin Hu,Wensheng Li,Hui Ao,Chunyan Cao,Tao Liang
A series of Sr (1 − x − y − z ) MoO 4 : x Eu 3+ , y Bi 3+ , z R + (R + = Li + , Na + , and K + ) phosphors are prepared through solid-state reaction method in air. Eu 3+ doped SrMoO 4 phosphor can show red emission at ∼616 nm under excitation 275 nm and 397 nm light due to the 5 D 0 → 7 F 2 transition of Eu 3+ ion, and its emission intensity can be enhanced after co-doping Bi 3+ owing to energy transfer between Bi 3+ and Eu 3+ ions. The mechanism of energy transfer is discussed by the schematic energy level diagrams of Bi 3+ and Eu 3+ ions. The optimal composition in Eu 3+ and Bi 3+ co-doped SrMoO 4 phosphors is determined to be (Sr 0.92 Eu 0.05 Bi 0.03 )MoO 4 . The emission intensity of SrMoO 4 :Eu 3+ , Bi 3+ phosphor is found to be further improved by using Li + , Na + , and K + ions as charge compensators. These experiment results in the paper are helpful to develop novel and high-efficiency phosphors for white light-emitting diodes.
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高影响因子
JOURNAL OF POWER SOURCES
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2017
·
IF 6.395
Hanna He,Qi Zhang,Haiyan Wang,Hehe Zhang,Jiadong Li,Zhiguang Peng,Yougen Tang,Minhua Shao
Inferior electronic conductivity and sluggish sodium ion diffusion are still two big challenges for TiO 2 anode material for Na ion batteries (SIBs). Herein, we synthesize TiO 2 /C composites by the pyrolysis of MIL-125(Ti) precursor and successfully introduce defects to TiO 2 /C composite by a simple magnesium reduction. The as-prepared defect-rich TiO 2-δ /C composite shows mooncake-shaped morphology consisting of TiO 2-δ nanocrystals with an average particle size of 5 nm well dispersed in the carbon matrix. When used as a SIBs anode, the defect-rich TiO 2-δ /C composite exhibits a high reversible capacity of 330.2 mAh g −1 at 50 mA g −1 at the voltage range of 0.001–3.0 V and long-term cycling stability with negligible decay after 5000 cycles. Compared with other four TiO 2 /C samples, the electrochemical performance of defect-rich TiO 2-δ /C is highly improved, which may benefit from the enhanced electronic/ionic conductivities owing to the defect-rich features, high surface area rendering shortened electronic and ionic diffusion path , and the suppress of the TiO 2 crystal aggregation during sodiation and desodiation process by the carbon matrix.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 38
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IF 1.866
Shuyi Wang,Xiaohui Tian,Jinyu Sun,Jin Liu,Junchao Duan
Na-montmorillonite/polyethyleneimine- g -poly(methyl methacrylate) (Na-MMT/PEI- g -PMMA) nanocomposite latexes were prepared by soap-free emulsion polymerization in the aqueous suspension of Na-MMT. The exfoliated morphology of the nanocomposites was confirmed by XRD and TEM. With the aim of improving morphology and mechanical properties of natural rubber latex (NRL) films, the synthesized Na-MMT/PEI- g -PMMA nanocomposites were mixed with NRL by latex compounding technology. The results of SEM and AFM analysis showed that the surface of NRL/Na-MMT/PEI- g -PMMA film was smoother and denser than that of pristine NRL film while Na-MMT was dispersed uniformly on the fracture surface of the modified films, which suggested the good compatibility between NRL and Na-MMT/PEI- g -PMMA. The tensile strength of NRL/Na-MMT/PEI- g -PMMA films was increased greatly by 85% with 10 phr Na-MMT/PEI- g -PMMA when Na-MMT content was 3 wt % and the elongation at break also increased from 930% to 1073% at the same time. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43961.
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ANALYTICAL CHEMISTRY
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2017
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IF 6.32
Lu Li,Yuanyuan Fan,Qingling Li,Renjie Sheng,Haibin Si,Juan Fang,Lili Tong,Bo Tang
Various intracellular metal ions have closely related functional roles in the nervous system. An excess or deficiency of essential metal ions can contribute to neurodegenerative diseases. Thus, the detection of various metal ions in neurons is important for diagnosing and monitoring these diseases. In particular, single-cell analysis of multiple metal ions allows us to not only understand the cellular heterogeneity and differentiation but also determine the actual relationships among multiple metal ions in each individual cell. Aiming at the low efficient single-cell manipulation and interference of complex biological matrices within cells in the existing method for single-cell metal ion detection, in this manuscript, we present a convenient, sensitive, and reliable method to simultaneously identify and quantify multiple metal ions at the single-cell level using a microfluidic system. Using the combination of on-chip electrophoresis separation and multicolor fluorescence detection, we achieved the simultaneous analysis of Na+, K+, Ca2+, and Mg2+ in single PC-12 cells and studied changes in these four metal ions in Aβ25–35-treated PC-12 cells, which is a model of Alzheimer’s disease (AD). The data showed that metal ions imbalances in neuron-like cells may be associated with AD induced by Aβ25–35. This method paves the way for multiple metal ion detection in single neuron-like cells, and the results provide insights regarding synergistic function of multiple metal ions in regulation of neurological diseases at the single-cell level.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Lina Wang,Hanpei Yang,Qiangshun Wu,Rui Ma
Photocatalysis-self-Fenton system, integrating photocatalysis with Fenton technology, emerge as promising approaches for environmental remediation. In this study, we introduced K, Na doped g-C 3 N 4 /FeOCl (DCN/FeOCl) catalyst, where amino groups on the DCN surface interacted with unsaturated Fe on FeOCl, forming Fe–N bonds and a Z-scheme heterojunction . The resulting DCN/FeOCl demonstrated efficient H 2 O 2 production and rapid tetracycline (TC) degradation under visible light. The Z-scheme heterojunction and nitrogen vacancy enhanced electron-hole pair separation and O 2 adsorption. Additionally, we proposed a mechanism for dual-channel photocatalytic H 2 O 2 production. This work presents a novel strategy for in-situ H 2 O 2 production and activation, facilitating water decontamination .
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MICROPOROUS AND MESOPOROUS MATERIALS
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2024
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IF 4.8
Hao Zhou,Zhe Hong,Lijiao Ma,Yingyuan Tan,Jingcheng Xu,Wenzhi Jia,Junhui Li
The experiments of the adsorption removal of CS 2 impurity from a mimetic coke oven gas were performed by using a series of Na-type zeolites as adsorbents. Combining with the diffusion & simulation calculations and several characterizations, it's found both the development degree and the diffusion ability of microporous systems significantly influence the adsorption performance of these Na-type zeolites on which the physical absorption was predominant for CS 2 molecules. Firstly, compared with NaZSM-5 or NaSAPO-34, the NaY with FAU-type framework exhibited a much higher breakthrough adsorption capacity, primarily due to its much higher microporous surface area & volume and larger-size channels, which ensured a broader adsorption space, a high-efficiency molecule-diffusion and a high adsorption utilization of micropores. Secondly, alkali-treatment introduced some mesopores into NaZSM-5 crystals but also resulted in a declined integrity of microporous structure, causing an obvious decline of adsorption performance. Thirdly, the nano-crystal NaZSM-5 or NaY exhibited a much higher breakthrough adsorption capacity than that of the corresponding micron-crystal zeolite, primarily attributed to both the increased microporous surface area & volume and the shortened micropore diffusion-path length of the former. In addition, a breakthrough adsorption capacity of up to 0.251 g/g was obtained in the first adsorption use of a nano-NaY-0.909 sample at 298 K, and it's 0.229 g/g in even the sixteenth time of operation (by then, total adsorption service hours were 80.58 h). Our work may provide an important reference for developing high-performance adsorbents for removing gaseous CS 2 impurity in coke oven gas.
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Journal of Materials Chemistry A
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2017
·Vol. 5
·期 24
·12144-12148
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IF 8.867
Qianqian Yang,Jie Zhou,Genqiang Zhang,Cong Guo,Meng Li,Yongchun Zhu,Yitai Qian
Sb nanoparticles encapsulated in 1-D N-doped porous carbon (denoted as Sb/NPC) have been fabricated by an in situ nanoconfined replacement reaction between SbCl3 and the intermediate Ni/NPC, in which Ni/NPC was obtained by annealing the hydrothermally synthesized nickel–nitrilotriacetic acid (Ni–NTA) precursor in an argon atmosphere. The Sb nanoparticles with a size of 10–20 nm were uniformly encapsulated in the 1-D N-doped porous carbon scaffolds. When the Sb/NPC composite was applied as an anode material in the batteries, it exhibited a high reversible capacity of 556 mA h g−1 at 200 mA g−1 after 100 cycles for Li-ion batteries (LIBs) and a reversible capacity of 400.9 mA h g−1 at 100 mA g−1 after 100 cycles for Na-ion batteries (NIBs). Such enhanced electrochemical performance of the designed Sb/NPC can be attributed to the synergistic effect between uniformly dispersed Sb nanoparticles and the 1-D N-doped porous carbon matrices.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2025
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IF 2.1
Ruxue Yao,Yang Ge,Jiangtao Song,Fei Yuan,Yafei Guo,Tianlong Deng
The Qaidam Basin has potassium- and calcium-rich oil field brine resources at high temperatures. Since the phase diagram is a powerful tool to guide the separation and purification of inorganic chemical engineering for the development of potassium resources in oil field brine, the quaternary oil field brine system (Na+, K+, Ca2+//Cl– -H2O) and its two subsystems ((Na+, Ca2+//Cl– -H2O) and (K+, Ca2+, //Cl– -H2O)) at 338.15 K were reported for the first time by the isothermal dissolution equilibrium method. The compositions of the equilibrium solid phases were analyzed and identified by combined chemical analyzing and X-ray diffraction. The quaternary system has four crystallized regions corresponding to NaCl, KCl, KCl·CaCl2, and CaCl2·2H2O at 338.15 K, and the incongruent double salt KCl·CaCl2 occurred at 338.15 K. The study facilitates the enrichment of thermodynamic data and exploits brine-based potassium resources.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Bo Ran,Ping Hu,Jun Sun,Jialu Fang,Qihua Sun,Juqi Wang,Yuqing Zhu,Ning Tian,Zhaofeng Wu,Haiming Duan
In this study, biomass-derived carbon material obtained from Lyocell fibers was first utilized as a gas sensor. The impacts of varying pyrolytic carbonization temperatures and pregrinding treatments on the structure, surface morphology, elemental composition, and gas sensitivity of the samples were thoroughly examined. The CL-500 sensor can realize rapid detection of trimethylamine with a high response (12.79k%, 500 ppm) and high selectivity at room temperature; the response/recovery times are 10 s and 2 s, respectively, and the theoretical detection limit is 3.96 ppm. Moreover, after four months, the response of the CL-500 sensor to trimethylamine fluctuated by less than 9.7 % compared with that of the fresh sensor, indicating good stability. It also shows good recovery after seven consecutive response-recovery cycles. Additionally, the CL-500 sensor has promising applications in real-life fish freshness monitoring. Theoretical calculations indicate that the introduction of trace amounts of Na enhances the sensing performance of this sensor for target gases. This study serves as a guide for developing cost-effective, high-performance gas sensors, promoting the efficient and high-value utilization of biomass waste.
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PubMed
高影响因子
ACS Applied Nano Materials
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2025
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IF 5.5
Xinran Li,Yuwei Zhong,Habib Ullah,Jian Luo,Lee Li,Ghafar Ali,Alaa G. M. Osman,Xiujian Zhao,Yi Xie
The intrinsic structural lability and limited processability of inorganic halide perovskites heavily hamper their commercial applications. Herein, we develop a facile and scalable room-temperature (RT) water-based procedure for the synthesis of Na–Cu-codoped CsPbIxBr3–x-embedded Pb(OH)I (denoted as the Na–Cu–CsPbIxBr3–x@Pb(OH)I) composite to overcome the above-mentioned bottlenecks. Compared to Na doping, the codoping with Na and Cu leads to a slight shift of the photoluminescence (PL) peak position from ∼612 to 622 nm, increases the PL intensity by 32.5 times, and improves the PL quantum yield from 1% to 5%. Notably, the optimized Na–Cu–CsPbIxBr3–x@Pb(OH)I composite displays outstanding stability under various harsh environments such as soaking in RT water or hot water (up to 90 °C) and annealing at high temperature, which indicates that Pb(OH)I can act as an effective water-blocking and protective encapsulation layer. It is more interesting that the photoluminescence (PL) intensity of Na–Cu–CsPbIxBr3–x@Pb(OH)I can be significantly increased to 2.17 and 1.29 times after soaking the sample in RT water for 35 and 105 days, respectively, and 1.25 times even after immersing in hot water (90 °C) for 6 h, indicating an improved optical property. Meanwhile, the crystal structure and emission wavelength are maintained. The insight of this work is quite beneficial for designing highly stable inorganic perovskite-based nanomaterials for realization in light-emitting devices and other optoelectronic devices.
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Advanced Energy Materials
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2024
·
IF 24.4
Xiecheng Yang,Dantong Zhang,Lanqing Zhao,Chao Peng,Kun Ren,Changfan Xu,Pan Liu,Yingjie Zhou,Yong Lei,Bin Yang,Dongfeng Xue,Feng Liang
Rechargeable Na-CO 2 batteries are considered to be an effective way to address the energy crisis and greenhouse effect due to their dual functions of CO 2 fixation/utilization and energy storage. However, the insolubility and irreversibility of solid discharge products lead to poor discharge capacity and poor cycle performance. Herein, a novel strategy is proposed to enhance the electrochemical performance of hybrid Na-CO 2 batteries, using water-in-salt electrolyte (WiSE) to establish an optimal reaction environment, regulate the CO 2 reduction pathway, and ultimately convert the discharge product of the battery from Na 2 CO 3 to formic acid (HCOOH). This strategy effectively resolves the issue of poor reversibility, allowing the battery to exhibit excellent cycle performance (over 1200 cycles at 30 °C), especially under low-temperature conditions (2534 cycles at −20 °C). Furthermore, density functional theory (DFT) calculations and experiments indicate that by adjusting the relative concentration of H/O atoms at the electrolyte/catalyst interface, the CO 2 reduction pathway in the battery can be regulated, thus effectively enhancing CO 2 capture capability and consequently achieving an ultra-high discharge specific capacity of 148.1 mAh cm −2 . This work effectively promotes the practical application of hybrid Na-CO 2 batteries and shall provide a guidance for converting CO 2 into products with high-value-added chemicals.
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