JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2014
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IF 2.045
Libin Chen,Ying Zhang,Sheng Wang,Xiong Zheng,Maogang He
The thermal diffusivities of 2-methoxy-2-methylpropane (MTBE, mass purity, > 0.990, GC) were measured by using the dynamic light scattering method at T = (303.15 to 493.15) K and p = (1.5 to 10) MPa, including saturated liquid, saturated vapor, and compressed liquid. The expanded relative uncertainty in thermal diffusivity was estimated to be less than 2.0 % over the entire investigated range. The polynomial representation for thermal diffusivity of MTBE was proposed by employing the experimental results. Comparing the calculated results with the experimental data, the average absolute deviations are 0.59 % for saturated liquid, 0.38 % for saturated vapor, and 0.43 % for compressed liquid.
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ACS Applied Polymer Materials
·
2024
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IF 4.4
Guangjian Dai,Shengtao Zhang,Wenjie Yang,Chunxiang Wei,SanE Zhu,Zhongxing Geng,Eric W. M. Lee,Hongdian Lu,Bin Yu,Wei Yang
The exploration of biomass-derived thermosetting resins for implementation in flexible electronic packaging has emerged as a central focus. Herein, a daidzein-derived monomer (DDAB) was synthesized, which featured carbon–carbon double bonds. Biobased resins, namely, DDAB/3SH and DDAB/4SH, were meticulously fabricated via photocuring process, entailing the amalgamation of DDAB with trithiol (TPTMP) and tetrathiol (PETMP) monomers, respectively. DDAB/4SH showed impressive mechanical properties with a tensile strength of 28.1 MPa and elongation at break of 21.3%. Notably, owing to the augmented free volume inherent within the system, DDAB/3SH exhibited an exceptional elongation at a break of 111.7%, thereby surpassing the performance metrics of the majority of previously documented thiol-containing compounds. Moreover, both DDAB/3SH and DDAB/4SH demonstrated desirable dielectric properties. Specifically, within the frequency range of 15–16 GHz, DDAB/3SH achieved a minimum dielectric constant of 2.58. The exceptional dielectric performance, coupled with the tunable mechanical properties, proves the substantial application potential of DDAB/SH biomass-derived resins for flexible electronic packaging applications.
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Journal of Materials Chemistry C
·
2024
·Vol. 13
·期 1
·295-305
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IF 5.7
Yanan Gao,Jingjing Wang,Jingxuan Yang,Yajie Wang,Wenjuan Tian,Bin Liu
Nitrogen-rich graphitic carbon nitride (g-C3N5) has garnered significant attention in photocatalytic hydrogen production due to its unique physicochemical properties. However, g-C3N5 faces persistent challenges stemming from rapid carrier recombination. In this study, we successfully synthesized a Pd/C3N5-K,I photocatalyst through sequential doping of non-metallic heteroatoms and metal nanoparticles. The Pd/C3N5-K,I photocatalyst demonstrates a remarkable enhancement in the photocatalytic H2 evolution rate (2.9 mmol g−1 h−1), approximately 14 times higher than that of pure g-C3N5 (0.2 mmol g−1 h−1). Characterization and calculation analyses reveal that iodine doping into the g-C3N5 skeleton leads to the formation of planar C–I bonds, facilitating C3N5 layer electron–hole pair separation. The subsequent insertion of Pd nanoparticles between the layers leads to electron accumulation on C3N5-K,I, while resulting in hole concentration on Pd nanoparticles, thereby facilitating thorough spatial separation of electron–hole pairs. The strategic co-doping of iodine and palladium nanoparticles effectively restrains carrier recombination of g-C3N5 by connecting intra- and inter-layer interactions. This study constitutes a novel conceptual framework for CN-based photocatalysts, offering a promising approach to improve their performance in hydrogen production applications.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2010
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IF 1.695
Xueqiao Xie,Yongsheng Yan,Juan Han,Yun Wang,Guowu Yin,Weisheng Guan
Liquid−liquid equilibrium data for the PPG400 (poly(propylene glycol)) + salt (potassium citrate, potassium tartarate, potassium oxalate) + water systems have been determined experimentally at T = (298.15, 308.15, and 318.15) K. The effects of temperature on the binodal curves and tie-lines were studied, and it was observed that an increase of the temperature generally led to an increase of the biphasic area. Furthermore, the binodal curves were fitted to a five-parameter equation relating the concentrations of PPG400 and salt. The effective excluded volume (EEV) values obtained from the binodal model were determined, and the salting-out ability of the anions follows the ordering citrate3− > tartarate2− ≈ oxalate2−. Finally, the Setschenow-type and Othmer−Tobias and Bancroft equations have been successfully used to correlate the tie-line compositions.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Tingting Tang,Fangqing Ye,Huang Hua,Chaoyang Li,Jian Shen
With the rapid development of 5G communication technology, microwave dielectric ceramics with high dielectric constants are very conducive to the miniaturization of passive devices. Here, Ba3Ti4–x(Ni1/3Nb2/3)xNb4O21 (BTN ∼ NN, 0.03 ≤ x ≤ 0.15) ceramics with hexagonal phases are synthesized via the solid-phase route. The composite (Ni1/3Nb2/3)4+ ion substitution strategy can substantially improve the microwave dielectric properties of the Ba3Ti4Nb4O21 (BTN) ceramic. The εr and Q × f values depend on the ionicity (Nb–O bonds) and lattice energies (Nb(1)–O3 and Nb(1)–O2(1) bonds). The microwave dielectric properties of the BTN ∼ NN (x = 0.09) ceramic sintered at 1250 °C are εr = 60.3, Q × f = 22073 GHz, and τf = 78.1 ppm/°C. A miniaturized all-ceramic radome (@400 mm × 400 mm × 8 mm) for 5G beam-splitting function is designed and demonstrated using this ceramic. Compared to other radomes designed for other work utilizing low εr, the size of this radome has been reduced by 3/7. The reflection coefficients of the beam splitting function are all 0.73, and the phase shifts are all 360°. This work contributes to the development of miniaturized passive devices from a materials point of view.
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Biomass Conversion and Biorefinery
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2024
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IF 3.5
Wang Huan,Luo Yijia,Wang Shan,Chen Youning,Zhao Wei
Magnetized pitaya peel bio-based carbon aerogel (MCA) was prepared by hydrothermal and freeze-drying methods; then, magnetized bio-based carbon aerogel (MCKEA) was obtained by the surface functionalization of MCA with 3-amino-1, 2-propylene glycol and KH-550. MCA and MCKEA were characterized by SEM, FT-IR, and XRD. The adsorption properties of MCA and MCKEA for dyes were investigated. It showed that the adsorption capacity of MCKEA for dyes was greater than that of MCA, especially for acid chromium blue K. The adsorption of acid chromium blue K by MCKEA conforms to the pseudo-second-order kinetic model and Langmuir adsorption model. The reusability experimental results showed that MCKEA can be reused for nine times. So MCKEA is a kind of adsorbent with high efficiency, high reusability, and low cost, which has broad application prospect. Graphical Abstract
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Manman Lu,Haoyuan Wang,Jianwei Fan,Zhilong Zeng,Yijia Li,Min Zhou,Xiong Liu
This study compared the physicochemical and structural properties, and in vitro digestibility of Amorphophallus konjac K. Koch starch (AKS) and Amorphophallus dunnii starch (ADS), by using potato starch (PS) as a control. ADS exhibited larger granule sizes, which led to higher transparency, swelling power (SP), and water solubility than AKS. Both AKS and ADS exhibited A-type crystalline patterns; however, ADS demonstrated higher relative crystallinity, gelatinization transition temperatures, and enthalpies of gelatinization, which may be due to higher 1047/1022 and more double helix contents. Regarding rheological and pasting properties, ADS exhibited greater viscosity than that of AKS, likely due to larger particle size and higher SP. In vitro digestion analysis revealed that >50 % of each starch type consisted of rapidly digestible starch. Notably, ADS contained the highest amount of resistant starch among the three types. The estimated glycemic index (eGI) values of AKS and ADS were 65.54 ± 0.54 and 63.28 ± 0.36, respectively, indicating that both starch types belong to the medium GI food category, though AKS was significantly higher than ADS. These findings suggest that konjac starch serves as a beneficial dietary carbohydrate alternative. AKS may be suited for fast-digesting food formulas for individuals with digestive impairment, whereas ADS could be advantageous for those managing diabetes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Xi Chen,Xiaoyan Wang,Ziliang Jia,Chao Yang,Zhihong Liu,Yuexing Wei,Mengxue Wang,Meisheng Liang
K-doped Mn–Ce solid solution catalysts were synthesized using a combination of coprecipitation and hydrothermal methods, demonstrating excellent performance in benzene oxidation. The catalyst K 1 Ce 5 Mn 5 exhibited comparable activity to noble metal catalysts, achieving a 90 % benzene conversion at approximately 194 ℃. Durable tests under dry and moist conditions revealed that the catalyst could maintain its activity for 50 h at 218 ℃ and 236 ℃, respectively. Characterization results indicated that the catalyst’s enhanced activity resulted from the weakened Mn–O bonding caused by the introduction of K + , facilitating the activation of oxygen and its involvement in the reaction. CeO x , the main crystalline phase of Mn–Ce solid solutions, provided abundant oxygen vacancies for capturing and activating oxygen molecules for the weakened Mn–O structures. This conclusion was further supported by partial density of state analysis from density functional theory computations, revealing that the introduction of K + weakened the orbital hybridization of Mn3d and O2p. Finally, in situ diffuse reflectance infrared Fourier-transform spectroscopy ( in situ DRIFTS) studies on Ce 5 Mn 5 and K 1 Ce 5 Mn 5 catalysts suggested that the introduction of K + promoted the conversion of adsorbed benzene. Furthermore, intermediate products were transformed more rapidly for K 1 Ce 5 Mn 5 compared to Ce 5 Mn 5 .
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Yongbiao Sun,Hui Li,Haijun Lai,Yan Yu,Meiling Hou,Chao Fu,Zaizhou Wang,Chunxiang Zhang
Natural gas purification before liquefaction necessitates the use of efficient adsorbents with high selective CO 2 adsorption and easy regeneration. Because of its efficiency and ease of operation, the ion exchange is widely employed to adjust zeolites’ CO 2 adsorption. However, few in-depth mechanistic studies have been undertaken on cation substitution regulation of pore structure and gas–solid interaction, as well as their synergistic effects on CO 2 selective adsorption and zeolite regeneration. In this study, we synthesized Li + and K + -modified 13X and examined their material characteristics, thermodynamics, adsorption kinetics, and the adsorption–desorption performance under various desorption methods. The results showed that the variation in pore structure and gas–solid interaction with cation radius is non-monotonic, resulting in 13XLi and 13XK having better CO 2 selective adsorption than 13X. All zeolites are extremely stable after 10 adsorption–desorption cycles in each regeneration setting. 13X outperforms 13XLi and 13XK in CO 2 desorption at 30 °C, owing to its large non-micropore volume and low gas–solid interaction. 13XK has the lowest CO 2 desorption rate at low temperature but the highest at high temperature, owing to the flat micropore distribution and the progressive gas–solid interaction. Approximately 100 % regeneration of 13XK is achieved with CH 4 purging (150 mL/min) at 150 °C, owing to its smallest cumulative pore volume at 0.5 nm. This research could help to develop efficient cation-modified X zeolites for CO 2 deep removal from CH 4 streams prior to liquefaction, as well as advance the in-depth understanding of cation substitution mechanisms.
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RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
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2024
·
IF 1.8
Jia-Yue Wang,Chen Yan,Han Sen-Jian,Guo Ya-Fei,Wang Shi-Qiang
To achieve efficient separation of alkali metal borate resources from the brines of the salt lake to provide a theoretical basis, this paper adopts the isothermal dissolution equilibrium method to study the solid-liquid phase equilibrium and phase diagram of the ternary system (LiB 5 O 8 + KB 5 O 8 + H 2 O) and (LiB 5 O 8 + NaB 5 O 8 + H 2 O) at 288.15 K. The study grasps the changing law of solubility and physicochemical properties of the system, as well as analyses and identifies the solid phase in stable equilibrium. The results show that the stable phase diagrams of the two ternary systems at 288.15 K are of the simple eutectic type, containing one invariant point, two univariate saturated solubility curves, and two crystalline regions. Among them, the crystalline region of LiB 5 O 8 ·5H 2 O is the smallest, indicating that it is not easy to precipitate from the saturated liquid phase, and the density and refractive index curves of each system show regular changes with the increase of LiB 5 O 8 content.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yumiao Niu,Yan Xiao,Yidan Chen,Chu Chu,Daqing Yang,Ying Wang,Bing-Bing Zhang
The disulfide dianion [S2]2–, as an important structural motif in sulfides, can incorporate isolated S2– to form homoatomic heteroleptic polyhedra [MSx(S2)y]. However, the sulfides that contain [MSx(S2)y] units have been rarely reported and have not been systematically investigated as infrared (IR) nonlinear optical (NLO) materials. It is verified in this work that the homoatomic heteroleptic coordination strategy enhances local structural asymmetry, leading to improved optical anisotropy and NLO performance. Three compounds, namely, ANb2PS10(A = K,Rb,Cs), were identified and prepared. They exhibit a large phase-matchable second-harmonic generation (SHG) response, with KNb2PS10, RbNb2PS10, and CsNb2PS10 showing the effects of 1.5, 2.2, and 1.8 (×AgGaS2@2090 nm), respectively, and large birefringence (Δn = 0.39@546 nm) with KNb2PS10 as a representative. The first-principles calculations indicate that [Nb2S4(S2)4]8– units play a dominant role in inducing strong SHG responses and large birefringence. By validating the homoatomic heteroleptic coordination strategy, this work opens avenues for the design of advanced optical materials.
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INFLAMMATION RESEARCH
·
2023
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IF 6.7
He Ze-Hui,Zou Jing-Tao,Chen Xia,Gong Jiang-Shan,Chen Ya,Jin Ling,Liu Yi-Wei,Rao Shan-Shan,Yin Hao,Tan Yi-Juan,Wang Zun,Du Wei,Li Hong-Ming,Qian Yu-Xuan,Wang Zhen-Xing,Wang Yi-Yi,Wan Teng-Fei,Luo Yi,Zhu Hao,Chen Chun-Yuan,Xie Hui
Objective Nanoparticles (NPs) hold a great promise in combating rheumatoid arthritis, but are often compromised by their toxicities because the currently used NPs are usually synthesized by chemical methods. Our group has previously fabricated Ångstrom-scale silver particles (AgÅPs) and demonstrated the anti-tumor and anti-sepsis efficacy of fructose-coated AgÅPs (F-AgÅPs). This study aimed to uncover the efficacy and mechanisms of F-AgÅPs for arthritis therapy. Methods We evaluated the efficacy of F-AgÅPs in collagen-induced arthritis (CIA) mice. We also compared the capacities of F-AgÅPs, the commercial AgNPs, and the clinical drug methotrexate (MTX) in protecting against K/BxN serum-transfer arthritis (STA) mice. Moreover, we evaluated the effects of F-AgÅPs and AgNPs on inflammation, osteoclast formation, synoviocytes migration, and matrix metalloproteinases (MMPs) production in vitro and in vivo. Meanwhile, the toxicities of F-AgÅPs and AgNPs in vitro and in vivo were also tested. Results F-AgÅPs significantly prevented bone erosion, synovitis, and cartilage damage, attenuated rheumatic pain, and improved the impaired motor function in mouse models of CIA or STA, the anti-rheumatic effects of which were comparable or stronger than AgNPs and MTX. Further studies revealed that F-AgÅPs exhibited similar or greater inhibitory abilities than AgNPs to suppress inflammation, osteoclast formation, synoviocytes migration, and MMPs production. No obvious toxicities were observed in vitro and in vivo after F-AgÅPs treatment. Conclusions F-AgÅPs can effectively alleviate arthritis without notable toxicities and their anti-arthritic effects are associated with the inhibition of inflammation, osteoclastogenesis, synoviocytes migration, and MMPs production. Our study suggests the prospect of F-AgÅPs as an efficient and low-toxicity agent for arthritis therapy.
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