JOURNAL OF CHEMICAL THERMODYNAMICS
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2022
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IF 3.269
Ying Zhang,Songtao Cao,Yuqi Su,Maogang He
The mutual diffusion coefficients of ethanol + isooctane and n- butanol + isooctane mixtures were measured by digital holographic interferometry. The measurements were performed at atmospheric pressure with temperatures ranging from 288.15 K to 318.15 K and mass fractions ranging from 0.05 to 0.95, and the effects of changes in temperature and composition were discussed. Based on the local composition theory, a new model is proposed for predicting mutual diffusion coefficients. Modified from the Vignes model, this model can be used to predict the mutual diffusion coefficient in ideal or non-ideal mixtures within a given deviation range. A comparison of the prediction results for the new model and five other models shows that the new model is far superior to the Darken model and Vignes model, and also has some advantages over the other models.
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2022
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IF 6.056
Xianghua Wang,Maorun Fu,Xiaoqian Qu,Jingjing Liu,Jianwen Bu,Shaoran Feng,Handong Zhao,Wenxiao Jiao,Fei Sun
(E)-2-Hexenal is one of the most prevalent and abundant volatile substances in fruits. Many researchers have attempted fumigation with (E)-2-hexenal to control fungal diseases with poor or no results; the key is the inability to maintain an effective concentration for a long time. Therefore, a new starch-based antifungal coating with (E)-2-hexenal microcapsules was prepared. The obtained results showed that the microcapsule embedding rate reached 78.95% by orthogonal optimization experiments and that the (E)-2-hexenal-based coating was effective at reducing the lesion diameter of apple fruit during storage at 25 °C after Penicillium expansum infection, and in other fruits; it also achieved a good antifungal effect. Moreover, the activities of the main defense-related enzymes and the expression of key genes involved in the salicylic acid (SA) signaling pathway, such as CHI, GLU, PAL , NPR1 , and PR1 , were enhanced by (E)-2-hexenal-based coating treatment. These findings suggest that the (E)-2-hexenal-based coating has the dual effect of direct antifungal and induction of apple system resistance. E2H-based coating is a promising approach to control postharvest Penicillium expansum in fruit.
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CONSTRUCTION AND BUILDING MATERIALS
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2022
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IF 7.693
Junjie Zhang,Hongbo Tan,Xiufeng Deng,Maogao Li,Shouwei Jian,Guangyan Li
High agglomeration and low adsorption limited the photocatalytic efficiency of TiO 2 . Hereupon, organic montmorillonite (OMt) was used as the support to load TiO 2 , with a view to achieve the homogeneous dispersion of nanoparticles and obtain the photocatalyst with mesoporous structure. In the present study, three kinds of expanding agents were used to prepare OMt, and then OMt/TiO 2 was produced by the process of diffusion, hydrolysis, and calcination. The microscopic properties were researched and the removal capability for methylene blue (MB) under simulated UV was discussed. Results showed that with the use of expanding agents, the basal spacing of montmorillonite (Mt) was enlarged significantly, and the biggest value was up to 4.35 nm. The optimal photoactivity of OMt/TiO 2 was observed after calcinating at 600 °C, which was much higher than that of Mt/TiO 2 and single TiO 2 . On the one hand, in comparison with Mt/TiO 2 , TiO 2 content in OMt/TiO 2 was increased by more than 358%, and the increase ratio for pore volume was 69%. On the other hand, in comparison with single TiO 2 , the mesoporous structure of OMt/TiO 2 improved the adsorption capacity for MB. Moreover, the surface of charge separation efficiency of TiO 2 was promoted by the presence of OMt, accelerating the photocatalytic removal of MB. Hence, the combination of OMt and TiO 2 could efficiently enhance photoactivity.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Tian Lan,Jimin Xu,Chengjie Wang,Yiran Wang,Xiangyang Liu,Maogang He
The advantages of deep eutectic solvent (DES), such as non-toxic, non-flammable, low vapor pressure and low cost, make it a green solvent for capturing carbon dioxide. Adding water can change the nanostructures of DES and thus significantly influent the physical and chemical properties. At present, most researches focus on the theoretical study while few experimental studies on the effect of water on the thermal conductivity of DES. In this paper, the 3ω experimental system was improved using a two-wire structure to eliminate the end effect and measured the thermal conductivities of the DES composed of choline chloride and ethylene glycol and its aqueous solution to study the effect of water on the thermal conductivities. The uncertainty of thermal conductivity is less than 4%. The second-order Scheffé polynomial was modified to make it more suitable for fitting the thermal conductivities of the mixtures containing DES. The average absolute relative deviation calculated by the equation is 2.16%, which corroborates the high accuracy of the improved equation.
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Small
·
2022
·Vol. 18
·期 11
·2105741
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IF 15.153
Mengchu Wang,Bike Zhang,Jiaqi Ding,Fanxing Zhang,Rui Tu,Matthew T. Bernards,Yi He,Pengfei Xie,Yao Shi
Catalysts made of in situ exsolved metal nanoparticles often demonstrate promising activity and high stability in many applications. However, the traditional approach is limited by perovskites as prevailing precursor and requires high temperature typically above 900 K. Here, with the guidance of theoretical calculation, an unprecedented and substantially facile technique is demonstrated for Cu nanoparticles exsolved from interstitially Cu cations doped nickel-based hydroxide, which is accomplished swiftly at room temperature and results in metal nanoparticles with a quasi-uniform size of 4 nm, delivering an exceptional CO faradaic efficiency of 95.6% for the electrochemical reduction of CO 2 with a notable durability. This design principle is further proven to be generally applicable to other metals and foregrounded for guiding the development of advanced catalytic materials.
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PubMed
高影响因子
FUEL
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2022
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IF 8.035
Chenyang Zhu,Ziwen Zhang,Sa Xue,Kun Hou,Hui Liu,Xiangyang Liu,Maogang He
The mixtures of fatty acid ester + alcohol are promising substitution fuels in engines. Due to their strong self- and cross-hydrogen bonds, the properties of these kinds of mixtures may show different characteristics from the fossil fuels composed of non-associating substances. In this work, the association effects on density and viscosity of fatty acid ester + alcohol are investigated from both experimental and theoretical aspects. The ethyl laurate + ethanol mixtures with 9 M fraction compositions are chosen, and the two properties are measured using a capillary viscometer system at temperatures from 313 K to 343 K and pressures up to 15 MPa. The positive excess volume and viscosity deviation of the mixtures are obtained, and the former is negligible compared to the experimental uncertainty. The Cubic-Plus-Association equation of state (CPA EoS) and the friction theory model are used to model the mixtures of ethyl laurate + ethanol. The relations of their self- and cross-associations to density, viscosity, and two excess properties (excess volume and viscosity deviation) are summarized. Different saturated fatty acid ester + 1-alcohol mixtures are also modeled with the CPA EoS. The variation characteristics of their viscosity deviations are analyzed and explained by their different association strength and the mole number of associated molecules.
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ENERGY
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2022
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IF 8.857
Xiaoya Zang,Jing Wang,Yong He,Xuebing Zhou,Deqing Liang
Tetrabutylammonium bromide (TBAB) is a typical thermodynamic additive that can enhance the hydrate equilibrium temperature . Additionally, semi-clathrate hydrates formed from TBAB solutions exhibit reasonable CO 2 adsorption performance. In this study, TBAB hydrates were synthesized to determine their carbon capture capacity from a ternary gas mixture of CH 4 /CO 2 /N 2 (0.5/0.4/0.1). We measured the effect of temperature, pressure, and TBAB mass fractions (0.05–0.2) on the formation of gas hydrates, which were analyzed using Raman spectroscopy, powder X-ray diffraction (PXRD), and cryo-scanning electron microscopy (Cryo-SEM). With a 0.05 TBAB aqueous solution, the maximum recovery factor of CH 4 was 1.646 at 290.1 K and 7.0 MPa, whereas the maximum CO 2 split ratio was 0.454 at a pressure of 7.0 MPa and temperature of 280.1 K. Furthermore, the cryo-SEM images revealed that the addition of TBAB significantly increased the specific surface area of the hydrate crystals compared with the pure water system. PXRD and Raman spectroscopy showed that the hydrate structure transformed from a SI to a semi-clathrate hydrate. The hydrate samples formed from the 0.05 TBAB solution were found to be type A and B, leading to greater gas consumption. These results are expected to provide support for hydrate gas separation technology.
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TALANTA
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2022
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IF 6.556
Linsha Wei,Junyang Ding,Jiaqi Wu,Lai Li,Qipeng Li,Li-Xiong Shao,Jianmei Lu,Jinjie Qian
Due to the harmfulness of diabetes, a fast and efficient glucose detector is particularly important. Metal-organic polyhedron (MOP) provides a porous framework and a special matrix, which makes it an excellent precursor for electrochemical detection . Herein, we report a novel MOP as a precursor for the preparation of an electrocatalytic detector for glucose. The new metal-organic polyhedron of Cu 4 (TPDC) 4 can be solvothermally obtained and characterized by X-ray crystallography, which can be thermally converted into nanosized copper oxides embedded into graphitic carbon layers ( MOP-CO ). The as-prepared MOP-CO electrode is further applied to glucose detection, which shows a fast response time (<1 s) in a wide linear range of 0–4000 μM and high sensitivity of 2720 μA mM −1 cm −2 , as well as low detection limit (26 nM (S/N = 3)), good anti-interference, repeatability and stability (>3600 s).
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 9
·4226-4232
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IF 3.925
Zhiwen Li,Jiyue Zhang,Qiyao Sun,Wenwen Shi,Tingxian Tao,Yingqiang Fu
A new method of ratiometric fluorescence detection of moxifloxacin (MOX) was developed based on carbon quantum dots (CQDs). Through a one-step hydrothermal method using soluble starch and acetic acid buffer solution as precursors, blue fluorescent CQDs with excitation wavelength-dependence were prepared. MOX could combine with CQDs to form a CQDs/MOX through hydrogen bonding. The absorption spectrum of CQDs/MOX and the fluorescence emission spectrum of CQDs overlapped to a certain extent, which allowed for fluorescence resonance energy transfer (FRET) formation between CQDs/MOX and CQDs. For MOX detection, as the MOX concentration increased, the intensity of the fluorescence emission peak of CQDs decreased gradually, the intensity of the fluorescence emission peak of CQDs/MOX increased gradually, and the fluorescence emission peaks of CQDs and CQDs/MOX both had a red-shift. Based on the FRET system between CQDs and CQDs/MOX, a new method for ratiometric fluorescence detection of MOX was established. This method was more effective for MOX detection in the concentration range 3.3 × 10−7 to 2 × 10−6 M. Our method had high sensitivity and selectivity, and the limit of detection was 2.59 nM. The recovery rate of simulated water samples was 98.37–101.15%, which showed that this method was feasible for MOX analysis of actual water samples.
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COMPOSITE INTERFACES
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2022
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IF 2.839
Jin Tian,Ting Xu,Zhongwei Zhang,Lizhou an,Xiaotun Li,Yefa Tan
To enhance the interfacial properties of carbon fiber (CF) reinforced epoxy composites without damaging the CF strength. The polydopamine (PDA) was used as the precursor layer, and polyethyleneimine (PEI) and nano-silica (nano-SiO2) were deposited on the surface of CF by layer-by-layer electrostatic self-assembly. The layered strengthening materials (CF-Ln) were prepared and the microstructure of the CF was systematically characterized. The results showed that when the number of self-assembled layers is 5 (CF-L5), nano-SiO2 covers the surface of CF uniformly, and the tensile strength of CF-L5 monofilament reaches the maximum value, which is 12.1% higher than that of untreated CF (U-CF). Meanwhile, the interface properties between CF-L5 and epoxy matrix have been significantly improved. The interfacial shear strength (IFSS) between CF-L5 and epoxy matrix is 99.4% higher than that of U-CF. The improvement of the interfacial properties between CF-L5 and epoxy matrix is due to the introduction of alarge number of active groups (-NH2, -OH) in the PEI/SiO2 multilayer film deposited on the surface of CF, which improves the wettability between the CF and epoxy matrix. Also, the nano-SiO2 increases the roughness of the CF surface and improves the mechanical engagement between the CF and epoxy resin.
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COMPOSITES PART B-ENGINEERING
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2022
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IF 11.322
Wenda Song,You Chen,Zhengzhi Mu,Yufei Wang,Zhiyan Zhang,Ze Wang,Linpeng Liu,Binjie Zhang,Yujiao Li,Bo Li,Dashun Zhang,Junqiu Zhang,Shichao Niu,Zhiwu Han,Luquan Ren
Carbon fiber reinforced polymer (CFRP) composites with lightweight, high-strength and high-modulus properties are in high demand across the fields of aerospace engineering , urban mass transit, new energy and architectural design . However, most CFRP composites suffer from delamination owing to the weak interlayer which plays an important role to transfer perpendicular load to plies. Here, inspired by natural hierarchical structures of feathers, a novel interleaf towards conventional CFRP composites was rationally designed and experimentally proved to be effective for significant enhancement of anti-delamination performance. Interestingly, ZnO nanorods grown on the electrospun nanofibrous mats and carbon fiber bundles formed a kind of cross-scale structure system. It was very similar to the natural hierarchical structures of feathers with rachis, barbs and barbules. Experimental results verified that the introduced hierarchical structures assuredly enhanced the interlayer toughening performance via substantial energy dissipation . When compared with original CFRP composites, the obtained CFRP composites with a feather-inspired interleaf exhibited significantly improved mechanical performance in Mode I and Mode II interlaminar fracture toughness . The proposed bio-inspired design philosophy and feasible fabrication method are anticipated to provide an industry-friendly way to effectively improve the mechanical performance of traditional CFRP composites and promote potential large-scale applications of bio-inspired CFRP composites in the broad engineering field.
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Nano Energy
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2022
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IF 19.069
Yuqi Qiu,Han Fang,Jiajie Guo,Hao Wu
Recent advancements in flexible electronics have imposed the challenge on developing multifunctional devices for long-term on-skin wearing comfort. Here, a self-powered fully nano/micro-fibrous triboelectric on-skin patch is developed. The all-polymer-based poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/polyvinyl alcohol nanofibrous membrane is used as the electrode for the first time, and polyimide/thermoplastic polyurethane (1:1) nanofibrous membrane along with thermoplastic polyurethane nano/micro-fibrous membrane work for contact electrification pairs. The patch exhibits excellent breathability with the water vapor transmittance rate of 8 kg m −2 day −1 , and hydrophobicity with the water contact angle of 113°. The capability of the patch for physiological status monitoring is further demonstrated through applications of fingertip interaction force detection, pronunciation sensing, human motion monitoring, and finger gesture recognition, representing the promising potential in interactive on-skin devices and health monitoring.
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危险品化学品经营许可证（带存储）