Arthropod-Plant Interactions
·
2020
·Vol. 14
·期 2
·169-179
·
IF 1.466
Sun Ya-Lan,Dong Jun-Feng,Huang Ling-Qiao,Wang Chen-Zhu
Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) is an important larval endoparasitoid of the cotton bollworm Helicoverpa armigera (Hübner). A better understanding of herbivore-induced plant volatiles (HIPVs) employed by C. chlorideae to locate hosts will contribute towards the biological control of this notorious crop pest. In this study, we first investigated the electrophysiological and behavioral responses of C. chlorideae to 19 volatile compounds emitted by herbivore-infested plants. Eleven odorants induced EAG responses of C. chlorideae , while only two compounds, cis -jasmone and cis -3-hexenyl acetate, were attractive to the parasitoid in Y-tube olfactometer assays. Next, we used two- and four-choice tests in cage settings to investigate the parasitism rate of H. armigera larvae by C. chlorideae on tobacco plants treated with different doses of cis -jasmone, cis -3-hexenyl acetate, and their mixtures. Results showed that the parasitism rate of H. armigera was significantly higher on the plants treated with cis -jasmone or cis -3-hexenyl acetate, and their optimal dose for both compounds was 1 mg. However, the mixtures of cis -jasmone and cis -3-hexenyl acetate did not increase H. armigera parasitism rate by C. chlorideae when compared with control groups. Our results indicate that the single compounds cis -jasmone and cis -3-hexenyl acetate, at certain doses, enhance parasitic efficiency of C. chlorideae , but their mixtures negate this effect. These results will help us in the exploitation of C. chlorideae as biological control agent to reduce the populations of H. armigera .
研究领域:
昆虫学
·
生态学
·
植物保护
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Huanhuan Zhang,Xuan Cai,Hongli Zhao,Wenqian Sun,Zhenxing Wang,Minbo Lan
Developing nanomaterials as alternatives of enzymes is of great significance to realize qualification and quantitation of superoxide anion (O 2 − ), which has been proved to play a crucial role in physiological condition. In this work, a novel electrochemical catalyst of cobalt nanoparticle doped porous cubic carbon (Co-PCC) was prepared through the calcination of zeolitic imidazolate framework-67 (ZIF-67), which was obtained from one-step synthesis. Then Co-PCC was used to construct enzyme-free electrochemical sensor for the detection of O 2 − . The response of H 2 O 2 , though much lower than that of O 2 − , was also caught by the Co-PCC/SPCE. The fabricated sensor exhibited obvious response towards O 2 − in the range of 0.8–76.8 μM (R 2 = 0.997) with a high sensitivity of 3.59 × 10 −4 mA μM −1 cm −2 and a limit of detection of 0.41 μM (S/N = 3). In addition, the proposed sensor can be used to detect O 2 − released from SK-BR-3 cells, which makes it possible to monitor the dynamic change of O 2 − in living cells.
研究领域:
生物化学
·
材料科学
·
医学检测
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaoya Gao,Zhimin Li,Honglin Yan,Dongyan Zhang,Yuan Wang,Yuan Ha
Ni-rich layered LiNi 0.80 Co 0.15 Al 0.05 O 2 (NCA) cathode materials have attracted extensive attention in power lithium ion batteries on account of their high specific capacities and low voltage delay. However, they still suffer from inferior cycling stability, especially operating at a high cutoff voltage. In this paper, a surface modification strategy was proposed by utilizing Al(PO 3 ) 3 as a coating material to enhance the cycling performance of NCA in 2.7–4.6 V (vs. Li/Li + ). The surface modification effects of Al 3+ lattice doping and Al(PO 3 ) 3 coating were verified to be well achieved. In particular, besides the functions in stabilizing surface crystal structure of the NCA and isolating the erosion from electrolyte, the Al(PO 3 ) 3 coating could eliminate the residual lithium on the NCA surface to in-situ generate the Li 3 PO 3 which was conductive to the rate performance. Accordingly, the Al(PO 3 ) 3 -modified NCA cathode delivered excellent cycling performance, of which the initial discharge capacity was 235.9 mAh . g −1 at high cutoff voltage of 4.6 V, with a capacity retention of 71.6% after 100 cycles at 1 C. This work demonstrates the feasibility of surface modification on NCA via the phosphate coating with multiple functions, and provides an efficient approach to improve the cycling stability of Ni-rich layered cathode materials at higher cutoff voltage.
研究领域:
材料科学
·
电化学
·
锂离子电池
·
能源存储
·
表面工程
·
固态化学
✓ 已验证
DOI
高影响因子
IONICS
·
2016
·Vol. 22
·期 10
·1947-1955
·
IF 2.119
Zhuo Kelei,Ma Xueli,Chen Yujuan,Wang Congyue,Li Aoqi,Yan Changling
The molecular imprinting technique is powerful to prepare functional materials with molecular recognition properties. In this work, a potentiometric sensor was fabricated by dispersing molecularly imprinted polymers (MIPs) into plasticized PVC matrix and used for the determination of 1-hexyl-3-methylimidazolium cation ([C 6 mim] + ) in aqueous solution. The MIPs were synthesized by precipitation polymerization using 1-hexyl-3-methylimidazolium chloride ([C 6 mim]Cl) as the template molecule, methacrylic acid (MAA) and ethylene glycol dimethacrylat (EGDMA) as the functional monomers, and EGDMA also as the cross-linking agent. The as-prepared electrode exhibited a Nernstian response (58.87 ± 0.3 mV per decade) to [C 6 mim] + in a concentration range from 1.0 × 10 −6 to 0.1 mol kg −1 with a low detection limit of 2.8 × 10 −7 mol kg −1 , high selectivity, and little pH influence. The as-prepared electrode was used for the detection of the [C 6 mim] + in distilled water, tap water, and river water with a good recovery. It was also successfully applied in the determination of mean activity coefficients of [C 6 mim]Br in fructose + water systems based on the potentiometric method at 298.15 K.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 2
·1-11
·
IF 2.584
Hu Shuting,He Junfeng,Chen Fuming,Liu Bin,zhai Wangjian,He Qinyu
Constructing Z-scheme heterojunction photocatalyst with strong redox ability to make for enhanced photocatalytic performance and efficient charge separation is extremely attractive but still underdeveloped. Herein, a Z-scheme heterojunction structured La(OH) 3 @In 2 S 3 composite (labeled by “LIS”) with photocatalytic for the methylene orange (MO) degradation under simulated light irradiation has been developed. The as-prepared LIS, together with commercial La(OH) 3 and pure In 2 S 3 fabricated with the identical processing method and starting materials as those of LIS, was characterized by X-ray diffraction, UV–vis diffuse reflectance spectra, scanning electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence spectra and electrochemical impedance spectroscopy. The results show the heterojunction of La(OH) 3 /In 2 S 3 has prolonged the lifetime of the photo-generated carriers. The photocatalytic activity test shows that over only a small amount (0.02 g in 100 ml MO) of LIS, the photodegradation rate of 95% toward MO can be obtained in 90 min, which is about 3.4 times higher than that over pure In 2 S 3 . The active species trapping experiments indicate that there were four active species playing roles in photodegradation as the following order: e – = ∙OH < h + < ∙O 2 – . A mechanism of Z-scheme heterojunction was proposed and well explained the enhanced photocatalytic performance. This work provides a new cost-effective photocatalyst with high photocatalytic properties.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 14
·19901-19911
·
IF 2.478
Wang Fei,Liu Xiaoyu,Liu Zhuang,Wang Yanming
The large-scale application of Li-ion batteries requires high-performance cathode materials. Herein, a high-activity Li 3 V 2 (PO 4 ) 3 /C composite cathode has been fabricated through a solid-state reaction employing dual carbon sources of poly(acrylic acid) and soluble starch. The effects of single carbon source and dual carbon sources on the physical and electrochemical properties of Li 3 V 2 (PO 4 ) 3 /C are analyzed. The porous structure induced by poly(acrylic acid) and highly conductive carbon resulted from soluble starch enable the composite to achieve large discharge capacities and stable cyclability at high C-rates. At 3.0–4.3 V and 10 C, a large discharge capacity of 121 mAh g −1 (nearly 91% of the theoretical capacity) can be obtained, along with high capacity retention of 88% over 1000 cycles. Furthermore, at 3.0–4.8 V, the composite also possesses larger high-rate capacities and better cyclability than other composites prepared using single carbon source. The dual carbon sources bring a synergistic effect to the enhancement of electrochemical performances of the Li 3 V 2 (PO 4 ) 3 /C composite.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 40
·e202404259
·
IF 1.9
Jiangwei Tao,Yixiao Qiu,Guangsu Tan,Shaoyu Yang,Wenda Li,Weiwei Wang,Yuzhu Wang,Chao Xu
Graphical This work provides in-depth investigation into the electrochemical and structural properties of O3-Na[Li 1/3 Mn 2/3 ]O 2 , a promising high-capacity anionic redox cathode material for sodium-ion batteries. Our findings also indicate that enhanced cycling stability and suppressed impedance increases can be achieved through optimized upper and lower cutoff voltages. Activating anionic redox is an effective strategy for enhancing the capacity of cathode materials in both lithium-ion and sodium-ion batteries. However, the fundamental mechanisms of O3-type sodium anionic redox cathodes remain poorly understood due to the limited availability of such materials, despite their inherent advantages such as high initial sodium content and high reversible capacity. Herein, we employ multiple characterization methods to elucidate the structural and electrochemical properties of O3-Na[Li 1/3 Mn 2/3 ]O 2 , a promising sodium anionic redox cathode developed recently, with a particular focus on the effect of cutoff voltages during electrochemical aging. Our synchrotron powder X-ray diffraction results indicate that charging the material to voltages above 4.1 V induces substantial structural changes, which compromise the structural and electrochemical reversibility of the material. This is corroborated by more rapid capacity decay and increased impedance, attributed to severe degradation on both the surface and in the bulk, as evidenced by the formation of lower valence manganese compounds. Furthermore, increasing the lower cutoff voltage for the discharge process effectively suppresses surface degradation, thereby improving cycling stability. This work offers a comprehensive understanding of a pivotal sodium anionic redox cathode material, providing valuable insights that can drive the development of advanced materials for sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 13
·130517
·
IF 3.721
Zhaoyu Wang,Lihua Jiang,Chen Liang,Chunpeng Zhao,Zesen Wei,Qingsong Wang
The overcharge issue still occupies a high safety risk for NCM cathode materials with less stable structure. In this work, an original overcharge protection electrolyte additive named as 3-fluoroanisol (3FA) is recommended for NCM 622. The anti-overcharge effect of 3FA was verified in detail by cycle voltammetry, constant-current overcharge and discharge, AC impendence and scanning electron microscopy measurement. The electrolyte conductivity and long-term cycle performance tests were conducted to evaluate the impact of 3FA on the cell system operated in conventional voltage range. The 3FA is electro-polymerized at about 4.4 V and the time from upper cut-off voltage to overcharge state is extended from 5.46 h to 11.82 h in CR2032 cell, no adverse effects are shown during normal use at the same time under the additive amount of no more than 5 wt.%. Moreover, C80 micro-calorimeter test shows that 3FA increases thermal stability of electrolyte and NCM 622 cathode system. The heat production during overcharge was measured further. With the increase of the amount of 3FA added, the heat production during overcharge increases and the peak heat release rate occurs near 4.4 V, which further proves the effect of overcharge protection of 3FA. Thus, 3FA enhances overcharge endurance and thermal stability of lithium-ion battery with NCM 622 cathode.
研究领域:
电化学
·
材料科学
·
能源存储
·
锂离子电池
·
功能材料
·
电极材料
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2024
·Vol. 26
·期 20
·10383-10389
·
IF 9.3
Haibo Zhu,Ting Zhong,Liu Yang,Yajing Shen,Qiangwen Fan,Zhanggao Le,Zongbo Xie
The photocatalytic activation of oxygen molecules (O2) is an environmentally friendly and sustainable alternative to substituted benzofuran-3(2H)-one synthesis. Herein, lead-free Cs2AgBiBr6 nanocrystals were used to activate O2 efficiently and selectively for the photocatalytic transformation of 4-hydroxycoumarins to functional 2-hydroxy-benzofuran-3(2H)-ones under an air atmosphere. Polyfunctionalized benzofuran-3(2H)-ones with a quaternary carbon center can be selectively obtained in moderate to good yields at room temperature via one-pot synthesis. Perovskite crystal structures have significant influence on photocatalytic activity due to the different charge separation abilities. The reaction mechanism was further investigated to confirm the contribution of reactive oxygen species (ROS).
研究领域:
材料化学
·
有机合成
·
光催化
·
绿色化学
·
纳米材料
·
环境科学
·
可持续化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Shuting Zhao,Wentao Qi,Chao Yang,Rui Ling
Na 3 V 2 (PO 4 ) 3 has received a lot of attention as a prospective cathode for sodium-ion batteries (SIBs) owing to its strong 3D wide-open architecture for Na + transport. However, the practical application is still hampered by its poor electronic conductivity and weak Na + diffusion kinetics . In this paper, a novel Mg 2+ -doped Na 3 V 2 (PO 4 ) 3 flower-like cathode (Na 3+x V 2-x Mg x (PO 4 ) 3 /C, x = 0, 0.02, 0.04, 0.06) with abundant mesoporous has been synthesized by a convenient template-assisted sol-gel method. Mg 2+ doping successfully triggers V 4+ /V 5+ reversible redox with improved voltage plateau and reversible capacity. The hierarchical mesoporous structure combined with carbon layers is beneficial to the fast transport of Na + and e − , which guarantee improved kinetic properties and enhanced conductivity. Attributed to these competitive advantages, significantly improved electrochemical properties of Na 3.04 V 1.96 Mg 0.04 (PO 4 ) 3 /C (NVMP-4) are acquired, including extremely high specific capacity (123.8 mAh g −1 at 1C), excellent rate performance (73.8 mAh·g −1 at 100C) and exceptionally stable energy output with 89.1 % capacity retention after 3000 cycles at 20C. Additionally, when assembled with a hard carbon anode (HC), NVMP-4||HC provides an exceptional energy density of 216.9 Wh kg −1 at 0.2C. By enhancing nanostructure and rational surface engineering, this project offers fresh perspectives for creating superior electrodes, increasing the energy density of SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 5
·8204-8211
·
IF 5.532
Qianchao Ma,Qiyun Liu,Meihua Wu,Yifei Liu,Rui Wang,Ruxian Zhou,Yanheng Xu,Haichao Wei,Ruiyu Mi,Xin Min,Lefu Mei,Zhaohui Huang,Bin Ma
In this study, La 2 (MoO 4 ) 3 doped with Eu 3+ was synthesized by the high-temperature solid-state method. The phase composition of the Eu 3+ -doped La 2 (MoO 4 ) 3 sample was confirmed by X-ray powder diffraction (XRD) analysis, and the microstructure was observed via the scanning electron microscopy (SEM). Under the excitation at 211 nm, the room temperature emission spectra of Eu 3+ in the samples with different doping levels were recorded. In addition, the prepared La 2 (MoO 4 ) 3 : x Eu 3+ ( x = 0–0.25) phosphors were color tunable. A non-contact optical thermometer with high sensitivity and high-temperature resolution was fabricated based on the different thermal quenching behaviors of the Mo–O group and Eu 3+ center. The fluorescence intensity ratio (FIR), temperature resolution (ΔT), maximum absolute and relative sensor sensitivity (Sa and Sr) of La 2 (MoO 4 ) 3 :Eu 3+ were calculated according to different thermal quenching effects between room temperature (298K) and 573K of Eu 3+ and Mo–O group. These results show that La 2 (MoO 4 ) 3 :Eu 3+ has excellent sensitivity and temperature resolution, good reversibility and reliability, as Sa = 0.0525 K -1 , Sr = 0.3724. % K −1 , ΔT = 0.0806 K and the FIR error was only 0.62%. Therefore, the Eu 3+ -doped La 2 (MoO 4 ) 3 is a promising candidate material for high performance non-contact optical thermometers.
研究领域:
材料科学
·
发光材料
·
光学传感
·
无机化学
·
功能材料
·
固体化学
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 8
·e5707
·
IF 3.14
Laiyun Zhou,Mingliang Wang,Kaixuan Wang,Tiantian Wen,Lanzhi Wang
Fe 3 O 4 @SiO 2 -CeCl 3 catalyzed chemoselective synthesis of functionalized 3-substituted-1,5-benzodiazepines via one-pot multicomponent and domino reactions has been developed. During the one-pot synthesis process, one new cycle and four new bonds (one C–C, two C–N and one C=C) were constructed by the nucleophilic addition and eliminate reaction (dehydration etc.) process, intramolecular proton transfer and cyclization process. The major advantages of the present method are good to excellent yields, shorter reaction time, simple experimental procedure, easy work up, mild reaction conditions, recyclability of the catalyst and ability to tolerate a variety of functional groups which gives economical as well as ecological rewards.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）