JOURNAL OF CHEMICAL THERMODYNAMICS
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2024
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IF 2.2
Fangfang Dai,Jiangting Cao,Na Liu,Meiyuan Peng,Chen Wang
In order to separate n-hexane/ethyl acetate (EA) produced in industrial production, the liquid–liquid extraction was used to separate the azeotropic system with sulfolane , 1,2-propanediol and dimethyl sulfoxide (DMSO) as extractants. The liquid–liquid equilibrium (LLE) data of the n-hexane + EA + sulfolane/1,2-propanediol/DMSO were measured at 303.15 K, 313.15 K and 323.15 K. The extraction capacity of the extractants were evaluated by the distribution coefficient (D) and separation factor (S). The LLE data were correlated using the NRTL and UNIQUAC thermodynamic models to obtain binary interaction parameters. The root mean square deviation (RMSD) were all less than 0.02 indicating that the two models were suitable for the phase equilibrium behavior. GUI-MATLAB software was used to test the reliability of the regressed binary interaction parameters. The Dmol 3 module of the Materials Studio was used to analyze σ-profile of n-hexane, EA and extractants and to assess the interaction energy between the components. The results show that sulfolane is the best extractant for the separation of n-hexane + EA.
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Applied Sciences-Basel
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2024
·Vol. 14
·期 20
·9232
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IF 2.5
Tao Jia,Jinpeng Yang,Jia Yu
Understanding the density of CO2+n-decane is crucial for designing and operating CO2capture, transport, and storage. The safety and effectiveness of CO2burial is directly affected by the density of CO2+n-decane mixtures. The liquid densities of CO2(1) +n-decane(2) mixtures with mole fractions of CO2x1= 0, 0.2032, 0.4434, 0.7589, and 0.8947 were measured using a vibrating tube densimeter. The combined expanded uncertainties of density with a level of confidence of 0.95 are estimated to be 0.6 kg·m−3. A total of 221 compressed liquid densities of CO2(1) +n-decane(2) mixtures along the five isotherms betweenT= (283 and 363) K with pressures up to 100 MPa were presented. The densities of mixtures were correlated by the modified Tait equation, resulting in absolute average deviations between the experimental and calculated values of 0.028%, 0.013%, 0.017%, 0.044%, and 0.042%. In addition, the isothermal compressibility, isobaric thermal expansivity, and excess molar volume were derived from the modified Tait equation.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Shuangshuang Li,Xin Jiang,Chi Zhao,Yuan Ren,Lixin Luo
Biosurfactants combined with bioaugmentation for the remediation of petroleum hydrocarbon-contaminated soils proved to be one of the most effective ways. However, research on lipopeptides combined with bioaugmentation is rare, and the biological mechanisms are undefined. Therefore, the effect of Raoultella planticola and the lipopeptides it produces to restore contaminated soils was investigated using n-hexadecane as a model of petroleum hydrocarbons. After 60 d, n-hexadecane removal rate increased from 31.3% in contaminated soil to 39.9% with R. planticola alone and 59.0% with R. planticola together with 1.0 g intracellular lipopeptide (INLS) and 7.5 g sodium gluconate (SG)/kg dry soil. Meanwhile, the nitrogen and phosphorus components of the soil increased by 13.9% and 8% in the experimental group, respectively. Besides, DHA activity was 6.7 times that of the control group at 28 d, indicating a considerable increase in DHA activity. Microbial community analysis revealed a considerable increase in functional genera of Sphingomonas , Nocardia , Pseudoalteromonas , Povalibacter , Apiotrichum , Pseudallecheria , and Ascodesmis . The amount of fungus in the experimental group was more than 30 times that of the control group after 60 d. Microbial co-occurrence networks showed improved interactions of Firmicutes and Ascomycota, encouraging synergistic cooperation among microbes and thereby accelerating n-hexadecane breakdown. At once, the metabolic pathways ko00071 and ko00980 for n-hexadecane degradation were greatly elevated, indicating that functional genes such as alkane 1-monooxygenase and NADPH-cytochrome P450 reductase were activated. These results implied that combining hydrocarbon-degrading microbial with INLS was a promising bioremediation technique to remove soil petroleum hydrocarbons.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Yingna Chang,Yuxiang Zuo,Jiawei Li,Jindi Wang,Kefan Song,Yu Liu,Rong Xing,Guoxin Zhang
Supportive atomic Zn electrocatalysts exhibit excellent stability for oxygen reduction reaction (ORR) due to their fully occupied d orbitals of Zn, but their catalytic activity is not satisfactory. Whereas heteroatom doping can anchor the Zn atoms to achieve higher Zn loading; and additionally serve as auxiliary sites to enhance the catalytic activity of Zn sites. Herein, we present a method for the synthesis of N, S co-doped carbon with highly dispersed Zn (named Zn-NSC). The ORR activity of the Zn-NSC catalysts is optimized by adjusting the pyrolysis temperature and the atomic structure of the dopant molecules. The optimized Zn-NSC demonstrates significantly enhanced ORR electrocatalytic activity, this is attributable to its highly co-doping of N and S heteroatoms that are adjacent to Zn atoms. Specifically, the Zn-NSC 3 catalyst exhibits remarkable ORR characteristics with excellent onset voltage (0.97 V vs RHE) and half-wave potential (0.87 V vs RHE), surpassing those of Pt/C (0.97 V and 0.85 V, respectively). Additionally, the Zn-NSC 3 can be utilized as efficient cathode for Al-air batteries, achieving a high power density of 119.4 mW cm −2 and satisfactory discharge stability. This work proposes an approach for synthesizing low-cost and efficient ORR electrocatalysts for Al-air battery applications.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jiankang Wang,Shuhong Liu,Ping Song,Xiao Zhang,Ying Song,Wanqian Guo,Zhongping Yao
Nanoparticle aggregation and metal ion leaching contribute to the poor cycling stability of nanostructured zero valent copper (ZVC) catalyst for molecular oxygen activation, greatly hindering its industrial application in wastewater treatment. Herein, N doped carbon coated Cu 0 (Cu@CN) catalysts were prepared by using polyvinylpyrrolidone (PVP) modified Cu-MOF as precursor through high-temperature pyrolysis method. The phase structure, surface morphology and microstructure information of as-synthesized catalyst were systematically characterized by XRD, Raman, SEM, XPS and TEM. Norfloxacin (NOR) degradation in Cu@CN/air system showed Cu@CN3-600, prepared by using 0.3 g PVP as N source and pyrolysis temperature of 600 ℃, exhibited excellent catalytic activity and stability as well as universality in treating various organic wastewaters. The removal rate of NOR after 60 min was 96.05 % and meantime total organic carbon (TOC) decreased by 49.80 % under pH 4.0 and 1.2 g/L catalyst. After three cycles, it still maintained 81.53 % removal rate, owing to the protection effect of N doped carbon on active Cu component against its leaching during degradation. The reaction mechanism of Cu@CN3-600 activating O 2 for NOR degradation was deciphered by reactive oxygen species scavenging experiment, electron paramagnetic resonance (EPR) and density functional theory (DFT) calculation. Finally, four possible degradation pathways were proposed by identifying 16 intermediates through liquid chromatography-mass spectrometry (LC-MS) technology. This work can provide a guidance for designing highly efficient Cu-based molecular oxygen activation catalyst for wastewater abatement.
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Advanced Electronic Materials
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2025
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IF 5.3
Chan Zhang,Xi Liu,Shaobo Han,Menxing Wu,Runfeng Xiao,Shangzhi Chen,Guangming Chen
Thermoelectric generators are one type of energy device widely used for wearable and flexible electronics to provide power to other devices. Organic aerogels with excellent thermoelectric and mechanical properties are promising candidates for such applications, but most of high-performance organic aerogels are made of p-type materials. It remains a great challenge to develop a low-cost and air-stable n-type organic aerogels with comparable performance with the state-of-the-art p-type counterparts to form an efficient thermoelectric power generator. In this study, a novel strategy based on a cellulose nanofiber skeleton is developed to form a high-performance n-type organic aerogel. The obtained n-type organic aerogels possess a Seebeck coefficient of −17 µV K −1 and can combine with their p-type counterparts to form a generator outputting 1 µW with a temperature difference of 50 K. Using the n-type organic aerogels, dual-parameter pressure and temperature sensing with high precision and reproducibility can be realized. The n-type aerogel will find its applications not only for outdoor self-powered systems, but also for human health diagnosis systems with real-time monitoring of multiple parameters without crosstalk.
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Food Chemistry-X
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2024
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IF 6.5
Jia Cheng Qian,Heng Peng Zhang,Yi Wang,Dan Liu
Cruciferous vegetables (CVs) are globally consumed with some health benefits believed to arise from indole-3-carbinol (I3C), a labile phytochemical liberated from indole glucosinolates, but few reports describe the effect of cooking on I3C reactions. Here, we present heat-promoted direct conversions of I3C in broccoli florets into indole derivatives, which are unique in the N -indolylmethylation and -hydroxymethylation of indole nuclei by 3-methyleneindole and formaldehyde formed in situ from the I3C dehydration and the dimerization of I3C to 3,3′-diindolylmethane (DIM), respectively. Such N -substituted indoles were found in a range of 0.4–4.6 μg per gram of steamed broccoli florets, with a novel compound N -(indol-3-ylmethyl)-3,3′-diindolylmethane (DIM-1) bio-evaluated to inhibit A375 cells with an IC 50 value of 1.87 μM. In aggregation, the investigation discloses the promoting effect of heating on the I3C transformation in CVs and identifies DIM-1 as an anti-cancer drug candidate, and thus updates the knowledge of I3C and bioactive derivatives thereof.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Ze Li,Wen-Jie Li,Jun Guo,Zi-Yuan Wang,Xing Yang,Yu-Ke Zhu,Tian-En Shi,Yi-Xin Zhang,Jing Feng,Zhen-Hua Ge
SnSe materials have attracted extensive attention in thermoelectrics due to their low thermal conductivity. Nevertheless, the thermoelectric properties of n-type polycrystalline SnSe are still low, and metallic Sn distributed in the SnSe1–x materials would affect the repeatability of thermoelectric performance. Herein, the thermoelectric properties of n-type polycrystalline SnSe0.95-based composites are highly enhanced by heterogeneous Cu doping. The carrier concentration of the SnSe0.95 material was optimized by SnCl2 doping. The strategy of heterogeneous Cu doping is employed in further improving the thermoelectric performance of the SnCl2-doped SnSe0.95 materials. In addition, partial Cu+ doping tunes the electron concentration to enhance the Seebeck coefficient. Moreover, metallic Sn distributed along the grain boundaries can be stabilized by forming Cu6Sn5 alloys, which improve the thermal stability of bulk composites. Excessive Cu particles and SnCl2 precipitates strengthen phonon scattering for lowering the lattice thermal conductivity. Ultimately, a peak ZT of 1.55 is yielded at 773 K in the SnSe0.95–1 wt % SnCl2–1 wt % Cu bulk composite, whose mechanical hardness is also increased. Hence, these results promote a feasible approach to simultaneously enhance the thermoelectric and mechanical properties of n-type SnSe-based composites, which might be worth exploring in other thermoelectric materials.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
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IF 6.3
Sixing Zhang,Guangyao Zhao,Zhen Li,Jianfeng Hu,Zhehui Zhao,Jiakang Yao,Na Cheng,Zhengguo Zhang
Traditional phase change materials (PCMs) offer broad application potential but face challenges such as environmental unfriendliness, high rigidity and poor heat transfer performance, resulting in low utilization efficiency. In this study, using biomass loofah sponge (LS) as the main framework and natural rubber latex (NRL) as the flexible modifier, the biomass-based PCMs (L-N) were successfully synthesized after encapsulating lauric acid (LA). The addition of nano-TiO 2 further enhanced thermal conductivity, ultimately leading to the development of flexible composite PCMs, L-N-Ti. In-depth characterizations revealed that the introduction of NRL significantly improved the system's strength and toughness, with tensile strength peaking at 1.161 MPa at 19.2 % NRL content, while maximum elongation at break reached 38.65 % at 26.3 % NRL. The incorporation of 7.4 wt% TiO 2 significantly boosted thermal conductivity to 0.57 W/(m·K), a 185 % increase over the unmodified material. Simultaneously, the energy storage efficiency (E m ) of L-N-Ti consistently exceeded 89.89 %, with only a 9.34 % loss in latent heat of fusion after 100 thermal cycles, indicating robust thermal stability. The successful advancement of L-N-Ti not only addresses the mechanical constraints inherent but also offers a sustainable biomass-based solution for effective thermal management within the 20°C–60 °C range.
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ACTA PHYSICO-CHIMICA SINICA
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2025
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IF 13.5
Xianghai Song,Xiaoying Liu,Zhixiang Ren,Xiang Liu,Mei Wang,Yuanfeng Wu,Weiqiang Zhou,Zhi Zhu,Pengwei Huo
Photocatalytic carbon dioxide (CO 2 ) reduction represents a hopeful approach to addressing global energy and environmental issues. The quest for catalysts that demonstrate both high activity and selectivity for CO 2 conversion has attracted significant attention. In this study, ultrathin N-doped BiOBr was synthesized using a simple straightforward method. Systematic experimental results indicated that N-doping reduced the thickness of the BiOBr nanosheets and increased their specific surface area. Moreover, the efficiency of photogenerated charge carrier migration and the CO 2 adsorption capacity were significantly enhanced, contributing to improved CO 2 photoreduction performance. Experimental results showed that the 2N-BiOBr exhibited the best catalytic performance, with a CO evolution rate of 18.28 μmol·g −1 ·h −1 and nearly 100% CO selectivity in water, which was three times higher than that of pure BiOBr. The potential photocatalytic mechanism was investigated using in situ FTIR analysis and DFT simulations. Mechanistic studies revealed that N atoms replaced O atoms as adsorption centers, enhancing the strong adsorption selectivity towards CO 2 over O–H in BiOBr and facilitating the formation of key reaction intermediates. This study provides new perspectives on the creation and developmen of effective photocatalytic materials, offering theoretical support for the application of photocatalytic technology in energy and environmental science.
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Micro and Nanostructures
·
2024
·
IF 2.7
Yanghai Gui,Shuaishuai Zhao,Kuan Tian,Jintao Wu,Huishi Guo,Xiaoyun Qin,Xiaomei Qin,Dongjie Guo,Canxiang Fang
N-methyl pyrrolidone (NMP) is an organic compound that is mainly used in chemical synthesis, the manufacture of anesthetics and pesticides, and the production of electronic materials, especially in the preparation of electrodes for lithium-ion batteries. However, their high volatility and toxicity pose potential risks to health and the environment. Therefore, the development of rapid, highly sensitive and low-cost NMP gas sensors is urgent. In this paper, ZnO nanorods were in situ grown on ceramic tubes via hydrothermal method and subsequently annealed at different temperatures. The gas sensing performance of ZnO nanorods after annealing at different temperatures was investigated. The results show that the ZnO nanorods annealed at 400 °C have more oxygen vacancies and excellent selectivity to NMP at 210 °C, with a response value of up to 67.33–100 ppm NMP, a response time of 25 s, and a low recovery time as low as 8 s. The sensors have potential applications for rapid monitoring of NMP and environmental health protection, providing a simple and feasible method for NMP detection.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Zhibo Yan,Yixuan Tao,Guangrui Liu,Jie Yin,Juan Li,Wenpin Wang,Jie Wu,Zhongcheng Li
Suffering from their low conductivity, Mn-base oxides are commonly inactive in H–OH activation. Generally, tailoring the coordinate environment of materials could induce variation in the atomic arrangement and further influence their chemical activity. Herein, we propose a feasible strategy to mediate the electronic structure of Mn-based oxides by facile hydrothermal method and thermal reduction route. Compared with MnO 2 sheets, the as-synthesized Ru/MnO–Mn 7 C 3 /N-doped carbon sheets (Ru/MnO–Mn 7 C 3 /NC) exhibit the higher activity for both acidic (73 mV) and alkaline water reduction reaction (44 mV@10 mA/cm 2 ). Benefitting from unique structures, Ru/MnO–Mn 7 C 3 /NC sheets show the better freshwater/seawater oxidation reactivity, exceeding RuO 2 . The strong interaction of MnO–Mn 7 C 3 heterostructures, Ru, and N-doped carbon endows Ru/MnO–Mn 7 C 3 /NC with the good freshwater and seawater dissociation performance, outperforming most of the reported Mn-based oxides.
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