Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 36
·9778-9785
·
IF 5.976
Qiang Zhang,Yan Xu,Zhuopeng Wang,Xia Zhang,Zhiguo Xia
Dual-emitting hierarchical Bi4(GeO4)3/Zn2GeO4 hybrid microspheres have been prepared by a facile one-pot hydrothermal synthesis of Zn2GeO4 with the addition of pre-synthesized BiOBr nanoplates. The phase composition and morphology evolution of the Bi4(GeO4)3/Zn2GeO4 composites are investigated depending on the amounts of BiOBr precursor used in the hydrothermal process. The photoluminescence peaks at 412 and 532 nm for the as-prepared Bi4(GeO4)3/Zn2GeO4 are ascribed to Bi3+ emission and defect-related centers in the Zn2GeO4 component, respectively, and the features show a quenching response toward a temperature increase. The fluorescence intensity ratio (FIR) of Bi3+: 3P1–1S0 (412 nm) to the defect emission center of Zn2GeO4 (532 nm) can be exploited as a self-calibrated temperature index for potential thermometer applications. The maximum relative sensitivity (Sr) is 3.96% °C−1 in the temperature range of 20 °C to 100 °C. This work expands the rational design strategy for controllable particle morphology and structure modulation, and further explores their synergetic distinctive properties and potential optical sensor applications.
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高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Ronghong Zheng,Shuangshuang Zhao,Hua Zhang,Haoyue Li,Jia Zhuang,Xingchong Liu,Haimin Li,Hanyu Wang
The defects of grain boundaries and film surface are harmful to the efficiency and stability of perovskite solar cells (PSCs). Defect passivation is an effective strategy to improve the performance of PSCs. In this work, a silane coupling agent 3-aminopropyltrimethoxysilane (APMS) was used as an additive of perovskite light-absorbing layer to passivate defects, thereby significantly improving charge transport, reducing charge recombination and improving device performance. The amino group in APMS can not only form a coordinate bond with the uncoordinated Pb in the perovskite, but also form a hydrogen bond with I (N-H⋯I). The crystallinity and uniformity of perovskite grains were improved obviously. Therefore, the addition of APMS greatly reduces the defects of perovskite and the power conversion efficiency (PCE) increased from 18.85% to 20.72% with less hysteresis. Furthermore, a proper carbon chain can be hydrophobic to improve the moisture stability of the perovskite. The PCE of the device remains 60% of the initial device after being placed at a humidity of 50–60% for 400 h. Therefore, this work proves that the use of silane coupling agents as additives is a promising strategy to achieve efficiency and stable PSCs.
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SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Dongjia Li,Bo Xiao,Xinyi Dai,Chao Wang,Yawei Wei,Haijun Chen,Yi Mai,Fuzhong Wu,Jiexi Wang
Amid the fast growth of lithium-ion batteries, LiNi 0.5 Mn 1.5 O 4 (LNMO) with a 4.7 V working voltage and cost advantages has gained significant attention. The instability of LNMO structure during high-voltage cycling leads to significant side reactions with the electrolyte, hindering its commercial development. Our study introduces a co-crystallization calcination strategy to enhance the optimization of LNMO. This study utilized a straightforward wet chemistry approach to combine the precursor of NASICON-type solid electrolyte Mg 0.5 Ti 2 (PO 4 ) 3 (MTP) with the precursor of LNMO. Subsequently, a MTP coating was formed in-situ on the surface of LNMO through a single-step calcination process. Co-crystallization and calcination processes limit LNMO particle secondary growth, shorten Li + diffusion path , achieve Mg 2+ and Ti 4+ co-doping, enhance structural stability , and result in triple modification, leading to a significant improvement in electrochemical performance . Among them, LNMO with a 1 % molar ratio modified by MTP reaches 81.7 % of the initial capacity after 500 cycles at room temperature and 84.3 % after 180 cycles at 55 °C. Under identical conditions, unmodified samples have 39.3 % and 76.3 %, respectively. Our research explores a novel application of NASICON-type solid electrolytes in modifying LNMO cathode material .
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RSC Advances
·
2020
·Vol. 10
·期 2
·620-625
·
IF 3.119
Xianying Fan,Xiaoyu Gao,Xuan Zhang,Guijia Cui,Huichao Lu,Zhixin Xu,Jun Yang
We report a low-cost hydrogel electrolyte by adding 3 wt% poly(acrylate sodium) (PAAS) into 1 M Na2SO4 aqueous electrolyte, which achieves a widened electrochemical stability window (ESW) of 2.45 V on stainless steel current collector from 2.12 V in 1 M Na2SO4 aqueous electrolytes (AE). Moreover, the H2 evolution potential reaches −1.75 V vs. Ag/AgCl on titanium current collector. The results reveal that the polymer network structure of PAAS has the ability to interact with water molecules and thus the hydrogen evolution reaction can be limited effectively, which broadens the ESW of aqueous electrolyte and allows the reversible Na-ion intercalation/deintercalation of Na3V2(PO4)3 as an anode material in aqueous electrolyte reported for the first time.
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Food Bioscience
·
2020
·
IF 3.067
Liang Gao,Xinyi Cheng,Xuwei Yu,Xiaosan Wang,Qingzhe Jin,Xingguo Wang
1-Oleoyl-2-palmitoyl-3-linoleoylglycerol (OPL) is a critical structured lipid in human milk fat and it plays an important role in infants' health. The development of an efficient method for such compound preparation is necessary. In this study, one- and two-step methods for OPL production by enzymatic acidolysis of fractionated palm stearin with mixed acids were compared in solvent-free and solvent systems. The results demonstrated that in the solvent system, the OPL contents by the one- and two-step methods were 45.8% and 56.7%, respectively. In the solvent-free system, the one- and two-step methods resulted in the formation of 43.7% and 54.8% OPL, respectively. Subsequently, acidolysis conditions of the two-step method were optimized. Under the optimum conditions, the content of OPL was 57.7%, and 83.2% of palmitic acid was at the sn-2 position . The prepared OPL has potential to be applied in infant formulas.
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高影响因子
CHEMISTRY & BIODIVERSITY
·
2022
·Vol. 19
·期 6
·e202200286
·
IF 2.745
Shu-Hua Zhang,Xian-Lin Yue,Xue Zhao,Jing Tang,Yu Yang,Rui Xu,Hao Ma,Shuai-Ming Zhu,Fu-Yao Luo,Qin Zhang,Guo-Gang Zhang,Chang-Wei Li
Longibrachiamide A ( 1 ), a new 20-residue peptaibol, along with three known ones ( 2 – 4 ), were isolated from the fungus Trichoderma longibrachiatum Rifai DMG-3-1-1, isolated from a mushroom Clitocybe nebularis (Batsch) P. Kumm, which was collected from coniferous forest of northeast China in our previous work. The structure of longibrachiamide A ( 1 ) was determined by its NMR and ESI-MS/MS data, the absolute configuration of 1 was further determined by Marfey's analyses. And the complete NMR data of 2 – 4 were also reported for the first time. The similar CD spectra of 1 – 4 showed that they all had mixed 3 10 -/α-helical conformations. Compounds 1 – 4 showed strong cytotoxicities against BV2, A549 and MCF-7 cells, and also showed moderate inhibitory effects against the tested Gram-positive bacteria, including MRSA T144 and VRE-10. Graphical
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 19
·10625-10637
·
IF 14.511
Kun Wang,Xiaobing Huang,Tao Zhou,Dan Sun,Haiyan Wang,Zhi Zhang
The NASICON-type Na4MnV(PO4)3 (NMVP) possesses potential as a cathode material in SIBs, and is known for its stable 3D Na+ superconductive framework, high voltage platform, and relatively low cost and toxicity. Nevertheless, the intrinsic poor electronic conductivity and Jahn–Teller effect from Mn3+ during cycling limit its further application. Herein, to address such issues, a well-designed 3D porous spheroidal Ce3+-doped NMVP@CeO2/C cathode was constructed via a simple spraying drying-assisted route. As proved, the synergistic effect of Ce3+ doping in the crystal framework and CeO2 surface coating was achieved simultaneously, which greatly improved the electronic conductivity, facilitated the ion diffusion transfer and stabilized the crystalline structure. As a result, the as-prepared sample delivered superior discharge performance (50.3 mA h g−1 at 50C) and long circular life (91.0 mA h g−1 after 2000 cycles at 5C with 86.7% capacity retention). Furthermore, the reversible biphasic reaction for cathodes was confirmed by Galvanostatic intermittent titration technique (GITT) and ex situ XRD. The DFT calculation revealed the influence of Ce3+-doping on the crystalline framework and electrochemical properties. Finally, the optimized NMVP cathode also showed great potential for practical utilization through the successful assembly of full cells.
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AQUATIC TOXICOLOGY
·
2024
·
IF 4.1
Yonghua Wang,Yujia Shang,Xiaodan Liu,Xi Chen,Guanhua Xu,Guanghua Lu
Benzophenone-3 (BP-3) is a commonly used ultraviolet absorber that has the potential to accumulate in organisms, leading to toxicity. Benzophenone-8 (BP-8) is one of the major metabolites of BP-3. In this study, zebrafish were exposed to different concentrations of BP-3 and BP-8 (1 μg/L, 30 μg/L, and 300 μg/L) to investigate their accumulation and toxic effects in various tissues, including zebrafish brain, gut, and liver. The analysis focused on neurotoxicity, oxidative damage, inflammation, and gene expressions. The results showed that both BP-3 and BP-8 accumulated in the tissues, with the highest concentration observed in the gut, followed by the liver and brain. BP-8 exhibited a stronger ability to accumulate. In the brain, exposure to 1 μg/L of BP-3 and BP-8 promoted cortisol production, while higher exposures (30 μg/L and 300 μg/L) inhibited acetylcholinesterase activity and suppressed cortisol production. In the gut, both BP-3 and BP-8 exposures disrupted oxidative stress, inflammatory immunity, and apoptosis functions. In the liver, BP-3 and BP-8 affected hepatic metabolism, oxidative stress, apoptosis, and inflammatory immunity. Comparing gene expression in the brain, gut, and liver, it was found that BP-3 and BP-8 had a lower effect on gene expression in the brain, while the effect on the gut and liver was significantly higher. BP-8 generally had a higher effect than BP-3, which aligns with the observed accumulation pattern. These findings provide valuable insights for the risk assessment of BP-3 and BP-8 in the aquatic environment.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Wei Zhao,Xunhui Xiong,Yingbang Yao,Bo Liang,Ye Fan,Shengguo Lu,Tao Tao
The construction of high capacity cathode materials consisting of two active components, LiFe x Mn 1-x PO 4 and Li 3 V 2 (PO 4 ) 3 , is rarely reported. Herein, 5LiFe 0.9 Mn 0.1 PO 4 ∙4Li 3 V 2 (PO 4 ) 3 /C (LFMVP/C) composites are synthesized by a simple two-step process, including ball milling and heat-treatment. The electrochemical reactivity of the composites with lithium is evaluated. The cathode assembled with LFMVP/C shows better electrochemical performance than that of the single active component (LiFePO 4 , LiMnPO 4, or Li 3 V 2 (PO 4 ) 3 ) during charging and discharging in the potential range of 2.4 and 4.8 V. It delivers the specific capacities of 195, 173, and 158 mAh∙g −1 at 0.1C, 0.5C, and 2C, and retains 88% of the initial discharge capacity after 100 cycles at 0.1 C. Compared with the single active component (LiFePO 4 , LiMnPO 4, or Li 3 V 2 (PO 4 ) 3 ), the lithium-ion diffusion coefficient of the composite composed of two active components (LFMVP/C) is higher.
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JOURNAL OF PHYSICAL CHEMISTRY B
·
2011
·
IF 3.603
Jianji Wang,Lamei Zhang,Huiyong Wang,Changzeng Wu
Material preparation in ionic liquids and environmental pollution control by ionic liquids are often closely dependent on the aggregation behavior of ionic liquids in solution. In the present work, conductivity, fluorescence probe, and dynamic light scattering techniques have been used to study the effect of organic solvents on the aggregation behavior of 1-dodecyl-3-methylimidazolium bromide in water. It was shown that the critical aggregation concentration (CAC), the ionization degree of the aggregates (α), and the standard Gibbs energy of aggregation (ΔGm°) of the ionic liquid increase, while its aggregation number (Nagg) and aggregates’ size decrease with increasing concentration of organic additives in water. These results have been discussed from the favorable interactions of alkyl chain of the ionic liquid with the mixed solvents. It is suggested that the solvophobic parameter, characterized quantitatively by Gibbs energy of transfer of hydrocarbon from gas into a given solvent, can be used to account for the effect of organic additives on the formation and growth of the ionic liquid aggregates in water. Aggregation behavior of ionic liquids in aqueous organic solutions can be modulated simply by the solvophobic parameters of hydrocarbon in the mixed solvents.
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DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 35
·14648-14655
·
IF 3.5
Hong Su,Cong Dou,Fan Dou,Wen Li,Jiachen Li,Xiaolian Chao,Zupei Yang,Xiaoming Wang,Huan Jiao
The efficiency of silicon solar cells is still lower than theoretical values, partly due to their inability to utilize the ultraviolet and infrared portions of the solar spectrum. Herein, a novel method using a KCa2Mg2(VO4)3 phosphor with a down-shift effect to improve the photovoltaic performance of silicon solar cells and enhance the utilization of UV light in standard p-type silicon solar cells is proposed. The synthesized phosphors were mixed with an ethylene vinyl acetate (EVA) copolymer and pressed into a film, which was subsequently encapsulated in monocrystalline silicon solar cells. The results show that the addition of this film notably enhanced the photovoltaic performance of the silicon solar cells; the current density was increased by 2.89% (from 33.20 to 34.16 mA cm−2), and the photovoltaic conversion efficiency was improved by 5.69% (from 15.11% to 15.97%) at the optimal concentration compared to bare cells.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2014
·
IF 2.129
Ke Zhang,Zheng-yin Yang,Bao-dui Wang,Shao-Bo Sun,Ying-Dong Li,Tian-rong Li,Zeng-chen Liu,Jun-mei An
A new Schiff-base ligand ( 1 ) with good fluorescence response to Al 3+ , derived from 2-oxo-quinoline-3-carbaldehyde and nicotinic hydrazide, had been synthesized and investigated in this paper. Spectroscopic investigation revealed that the compound 1 exhibited a high selectivity and sensitivity toward Al(III) ions over other commonly coexisting metal ions in ethanol, and the detection limit of Al 3+ ions is at the parts per billion level. The mass spectra and Job’s plot confirmed the 1:1 stoichiometry between 1 and Al 3+ . Potential utilization of 1 as intracellular sensors of Al 3+ ions in human cancer (HeLa) cells was also examined by confocal fluorescence microscopy.
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高影响因子
危险品化学品经营许可证（带存储）