ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Jing Chen,Huanming Wei,Haijun Chen,Wenhao Yao,Hualin Lin,Sheng Han
The N/P co-doped hierarchical porous carbon materials are synthesized by SiO 2 -template approach following potassium phosphate activation. Polyvinylidene fluoride is used as the carbon source, melamine as the nitrogen source and potassium phosphate as the phosphorus source and activator. The obtained porous carbon materials exhibit a hierarchical pore structure (∼0.6 and ∼4 nm), a large specific surface area (1431 m 2 g −1 ) and a high nitrogen and phosphorus content. These predominant characteristics enable the CNP-5-800 sample to exhibit a superior specific capacitance of 337 F g -1 at 0.5 A g −1 and outstanding cycling stability of 97.8% retention after 10000 cycles in a three-electrode system. Even in the two-electrode system (an all-solid-state symmetric capacitor), this kind of materials still can deliver an energy density of 23.1 W h kg −1 to 12.4 W h kg −1 at power densities of 720.4 W kg −1 to 13950 W kg −1 , respectively, and a cycling property of 98.7% maintenance after 5000 cycles. Therefore, the practicable synthetic method and excellent electrochemical performance make CNP- x - y materials a potential candidate in supercapacitor application.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Yanmei Yuan,Hong Tao,Jinhong Fan,Luming Ma
Compared with heavy metal catalysts, persulfate (PS) activated with iron-based materials for controlling refractory organic pollutants are more effective, environment-friendly, and safe to human health. However, Fe 2+ application is limited to acidic conditions, and Fe 0 is not thermodynamically stable in water. Ferrous sulfide (FeS) ore particles are large-sized, low-purity, crystallized iron-based materials that are inexpensive and readily available. In this work, FeS is proposed as an alternative electron donor to activate persulfate and degrade p -chloroaniline (PCA). The effects of initial solution pH, FeS dose, and persulfate concentration on PCA degradation and total organic carbon (TOC) removal were examined at 20 ± 5 °C in batch experiments. Cl − , SO 4 2 − , and Fe 3+ ions were the main inorganic products used to investigate the oxidative mechanism in the present system. Compared with Fe 2+ , FeS could serve as a continuous-releasing source of dissolved Fe 2+ and surface bound Fe 2+ , with PCA removal increasing by 80% at pH 7.0 for a 1 h reaction. In contrast with Fe 0 , recycling of Fe 3+ to Fe 2+ can prevent excessive Fe 2+ consumption and Fe 3+ accumulation. The PS activation mechanism was affected by the initial solution pH. And the application ranges of pH for PCA fast degradation was from 3.0 to 7.0 in the tested pH values of 3.0–11.0 and nearly complete degradation of PCA (>99%) was observed at 150 min, PCA degradation increased as the FeS dose and persulfate concentration increased. PCA removal, dechlorination, and TOC removal reached over 99% within 60, 210, and 500 min, respectively. Generation of small amounts of amorphous iron oxide precipitants on the residual FeS surface was, observed and FeS recyclability was conducted preliminarily. These findings suggest that FeS can function as an effective persulfate activator for PCA control.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2013
·Vol. 25
·期 40
·5762-5766
·
IF 14.829
Congcheng Fan,Arjan P. Zoombelt,Hao Jiang,Weifei Fu,Jiake Wu,Wentao Yuan,Yong Wang,Hanying Li,Hongzheng Chen,Zhenan Bao
Graphical Organic single-crystalline p-n junctions are grown from mixed solutions. First, C 60 crystals (n-type) form and, subsequently, C8-BTBT crystals (p-type) nucleate heterogeneously on the C 60 crystals. Both crystals continue to grow simultaneously into single-crystalline p-n junctions that exhibit ambipolar charge transport characteristics. This work provides a platform to study organic single-crystalline p-n junctions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Fei Qu,Ping Chen,Shuyun Zhu,Jinmao You
Ag nanoclusters (Ag NCs) templated by hyperbranched polyethyleneimine (PEI) with different terminal groups and molecular weights had been developed as a special optical sensor for detecting p-nitrophenol (p-NP). When adding p-NP into Ag NCs, an obvious color change from pale yellow to deep yellow could be observed by naked eyes, accompanying with an apparent red-shift of absorption peak, and the reason was attributed to the formation of oxygen anion of p-NP based on the transfer of H + from p-NP to amine groups of PEI. The molecular weights of template would greatly affect the sensitivity of p-NP. Ag NCs capped by PEI terminated ethylenediamine (EDA) possessed better sensitivity than other Ag NCs, showing good linear range from 5 to 140 μM with the limit of detection as low as 1.28 μM. Most importantly, this present system displayed high selectivity toward p-NP even in the presence of other nitrophenols and nitrotoluenes . This reliable method had been successfully applied for the detection of p-NP in real water and soil samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Jimin Xie,Min Liu,Guiqin Liu,Lixia Yuan,Dacheng Li,Zhiping Fan,Zhengping Wang,Bingquan Wang,Jun Han
The enthalpies of dilution of protocatechualdehyde and p-hydroxybenzaldehyde in the aqueous sodium chloride solutions were measured by using a mixing-flow microcalorimeter at 298.15 K. Densities of the ternary homogeneous systems at different temperatures (293.15, 298.15, 303.15, 308.15, and 313.15 K) were also measured with a quartz vibrating-tube densimeter. The homogeneous enthalpic interaction coefficients (h2, h3, and h4) were calculated according to the excess enthalpy concept based on the calorimetric data. The apparent molar volumes (Vϕ) and standard partial molar volumes (Vϕ0) of the investigated system were computed from their density data. The variation trends in h2 and Vϕ0 with increasing salt molality were obtained and discussed in terms of the (solute + solute) and (solute + solvent) interactions. The experimental results showed that the molecular structures of protocatechualdehyde and p-hydroxybenzaldehyde, especially the number of hydroxyl groups, have evident influence on their thermodynamic properties. The thermodynamic data obtained in this work may be helpful for exploring the structure–function relationship of protocatechualdehyde and p-hydroxybenzaldehyde.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2025
·
IF 4.9
Zhang Siqi,Wu Shu,Li Jinglei,Wang Qi,Yang Bowen,Guan Mengxiang,Peng Guirong,Zhao Xiaojia
The ferroelectric polymer PVDF and its copolymer have garnered significant attention in the field of dielectric energy storage due to their high permittivity and high breakdown strength. However, their high dielectric loss limits their application in the field of energy storage. Thus, reducing the dielectric loss of films while maintaining a high permittivity presents a challenge. In this paper, NiBDC and CuBDC were synthesized via solvothermal method and added into P(VDF-HFP) films, respectively. The effect of MOFs on the structure and dielectric properties of P(VDF-HFP) films were investigated. The results showed that the addition of MOFs could significantly increase the crystallization temperature while decreasing crystallinity and crystal size of the films. Tanδ decreased from 0.059 to 0.042 (10 k Hz, 18 °C) for the film with 10% CuBDC addition as coordinatively unsaturated metal centers in MOFs acted as electron traps that reduced tanδ and conductivity of the films. In addition, for the film with 1% CuBDC, the breakdown strength increased from 341.5 MV/m to 369.5 MV/m, the efficiency of the films increased from 87.7 to 93.9%.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Huiying Cheng,Jingchang Sun,Siwen Liu,Furong Cao,Liuting Shan,Zijiang Yang,Xiaofan Cui,Jiaxu Zhao,Zhen Qiao,Qiuju Feng
Low-grade heat (<100 °C) is abundant and ubiquitous in the environment, and the recovery of low-grade heat energy will be of great significance for the energy supply and the improvement of the environment. Low-cost and effective technologies for transforming low-grade heat into electricity are urgently needed. Thermocell (TEC) based on REDOX couples has become a promising technology for low-grade heat harvesting due to its advantages of low cost, scalability, and intrinsic high thermopower. To enhance its performance, different types of TECs need to incorporate various additives into the REDOX couples. However, there is currently no identical additive that effectively enhances the performance of both P-type and N-type TECs. In this paper, carboxylated chitosan is used as an identical additive, resulting in an increase in the Seebeck coefficient of P-type and N-type TECs by 115.33 % and 53.25 %, respectively. Furthermore, we introduce a novel sandwich-structured packing technique featuring a configuration of Metal/PET film/Carbon felt (MPC) for TEC. This approach effectively reduces both the cost and weight of the TEC, while the MPC structure further enhances their performance. The TEC can be scaled up to power electrical devices. Our achievement provides an effective strategy for harvesting low-grade heat energy.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2011
·Vol. 29
·期 3
·288-295
·
IF 0.478
Xu Gao-fei,Zhu Wei-pu
P(AA-MA) copolymers composed of acrylic acid and methyl acrylate with different molecular weights and sequence structures were synthesized by combination of ATRP and selective hydrolysis. These copolymers were used as membrane materials to separate benzene/cyclohexane mixture by pervaporation. The effects of molecular weight and sequence structure of the copolymers on the pervaporation performance were investigated in detail. For the random copolymers, the permeate flux decreased rapidly with the increasing of molecular weight. The separation factor was also influenced by the molecular weight, which was changed from no selectivity to cyclohexane selectivity with increasing the molecular weight. Contrarily, the block copolymer membrane showed good benzene selectivity with separation factor of 4.3 and permeate flux of 157 g/(m 2 h) to 50 wt% benzene/cyclohexane mixture.
✓ 已验证
产品关联
DOI
高影响因子
Photonics
·
2024
·Vol. 11
·期 8
·708
·
IF 2.1
Mingzhong Zhang,Shanshan Xu,Peng-Cheng Guan,Yue-Jiao Zhang,Jian-Feng Li
In surface-enhanced Raman scattering (SERS) detection research, the shape, structure, surface modification, and material selection of nanoparticles can significantly impact the SERS intensity. Petal-like gap-enhanced Raman tags (P-GERTs) possess numerous sharp tips and edges, which generate localized electric field enhancements, further amplifying the electric field enhancement effect on neighboring molecules and enhancing the SERS signal. Additionally, the surface of P-GERTs can be modified with functional molecules, enabling their application in the detection of disease biomarkers. Using COVID-19 as an example, the performance of P-GERTs in disease biomarker detection was validated, demonstrating that the signal intensity of this probe can reach 55 times that of regular gold nanoparticles and 36.7 times that of smooth shell gap-enhanced Raman tags (S-GERTs). Furthermore, in combination with magnetically retrievable magnetic bead substrates, the N-protein antigen was specifically detected in a one-step process. N-protein was detected within 15 min using a portable Raman spectrometer. The limit of detection (LOD) for the standard sample was 4.28 pg/mL, and the LOD for the actual throat swab sample system was 25.4 pg/mL. This workflow can be extended to the detection of other biomarkers, making it widely applicable.
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Yanli Xin,Wei Zhang,Yang Lei,Shan Wei,Shuaibing Zhang,Na Li,Yuansen Hu,Yangyong Lv
The inhibition of fungal contamination of food by natural plant essential oils is receiving widespread attention. In this study, 1 μL/mL p -anisaldehyde showed remarkable antifungal ability against Aspergillus flavus spore germination and mycelium growth. Experiments of peanut seeds infection showed that 4 μL/mL p -anisaldehyde inhibited the development of A. flavus spores on peanuts by 95.5% and the production of aflatoxin B1 production by 69.4%. Transcriptome analysis suggested that differentially expressed genes were primarily associated with spore growth, cell wall, cell membrane, oxidative stress, and energy metabolism. Physiological and biochemical experiments as well as scanning electron microscopy, fluorescence staining, and enzyme activity assay, further confirmed that p -anisaldehyde destroyed the cell wall, permeability, and ergosterol biosynthesis of the cell membrane and led to decreased mitochondrial membrane potential and accumulated reactive oxygen species. This study provided new knowledge on the antifungal activity of p -anisaldehyde and its mechanism of action, as well as theoretical support for p -anisaldehyde as a possible antifungal agent for the control of A. flavus contamination of food crops.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Abdul Basit,Tanveer Hussain,Xin Li,Jiwu Xin,Bin Zhang,Xiaoyuan Zhou,Guoyu Wang,Ji-Yan Dai
Being a major obstacle, Ag2Te has always been restricted in p-type AgSbTe2-based materials to improve their thermoelectric performance. This work reveals a stabilized AgSbTe2 through Sn/Ge alloying as synthesized by melting, annealing, and hot press. Interestingly, addition of Sn/Ge in AgSbTe2 extended the solubility limit up to ∼30% and hence suppressed Ag2Te in Ag(1–x)SnxSb(1–y)GeyTe2 compounds and led to enhanced electrical transport. Moreover, electrical and thermal transport properties of AgSbTe2 have been greatly affected by the phase transition of Ag2Te near 425 K. However, high-entropy Ag0.85Sn0.15Sb0.85Ge0.15Te2 compound results in a stabilized rock-salt structure and presents a high power factor of ∼10.8 μW cm–1 K–2 at 757 K. Besides, density functional theory reveals that available multivalence bands in Sn/Ge-doped AgSbTe2 lead to reduction in energy offsets. Meanwhile, a variety of defects appear in the Ag0.85Sn0.15Sb0.85Ge0.15Te2 sample due to entropy change, and thus lattice thermal conductivity decreases. Ultimately, a high figure of merit of ∼1.5 is attained at 757 K. This work demonstrates a roadmap for other group IV–VI materials so that the high-entropy approach may inhibit the impurity phases with extended solubility limit and result in high thermoelectric performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FlatChem
·
2024
·
IF 5.9
Siqi Gong,Jing Li,Fan Zhao,Mengdie Yan,Chenghao Huang,Guanzhong Huo,Chunli Li,Bing Wu,Jiapeng Liu
The emerging energy-saving and environmentally friendly capacitive deionization (CDI) technology has attracted more and more attention. However, it remains a great challenge to develop CDI electrode materials with excellent comprehensive properties. Herein, the porous N, P co-doping Ti 3 C 2 T x MXene (N, P-Ti 3 C 2 T x ) was prepared successfully by combining simple flocculation with an annealing process. Benefitting from the synergistic effect of the combination of porous structure and co-doping of N and P heteroatoms, the N, P-Ti 3 C 2 T x exhibits substantial specific surface area, which provides more surface bounding active sites for electrochemical reactions, thus assisting to boost the CDI performance. As a result, the N, P-Ti 3 C 2 T x exhibited an admirable salt (Na + ) adsorption capacity of 53.3 mg g −1 and exceptional recycling property. Impressively, the N, P-Ti 3 C 2 T x also exhibited superior desalination performance of Pb 2+ , characterized by an exceptionally high desalination capacity of up to 168.2 mg g −1 at 1.2 V, and the corresponding desalination rate reached 0.047 mg g −1 s −1 . Additionally, the deionization mechanism involved was elucidated through a series of characterizations. This work will furnish an effective avenue for the innovative design of MXene-based electrode materials toward high-performance CDI.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）