FUEL
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2024
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IF 6.7
Yuan Liu,Fang Liu,Li Yang,Feiqiang Guo,Shiliang Wu,Rui Xiao
The work introduced an innovative pathway for converting biomass-derived carbonyls into long-chain ethers, examining their low-temperature oxidation in a modified Cooperative Fuel Research (CFR) engine. The conversion of 2-butanone achieved 100 % and the selectivity of sec -butyl isopropyl ether reached the maximum of 83.13 % under optimal reaction conditions. Conversion of biomass-derived carbonyls increased from 31.77 % at 1 h to 36.28 % at 12 h, with the mass yield of long-chain ethers rising from 53.94 % to 62.86 %. At the same compression ratio, the maximum in-cylinder pressure and temperature increased as the long-chain ethers blending ratio increased. At the critical compression ratio, the net heat release rates (NHR) for blended fuels with 10 vol%, 20 vol% and 30 vol% long-chain ethers at the low-temperature heat release peak were 9.6 J/deg, 10.1 J/deg, and 10.0 J/deg better than that of n -heptane (6.3 J/deg), respectively. CO emissions from blended fuels before compression ignition were higher than n -heptane, while the value for the blended fuel with 30 vol.% long-chain ethers was reduced by 44.97 % compared to n -heptane after autoignition.
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JOURNAL OF PHYSICAL CHEMISTRY B
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2024
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IF 2.8
Xingyu Wen,Wenshuai Bai,Dayu Zhang
The sulfuric–acid-catalyzed esterification reaction of 2-butanol and propionic anhydride is a vital industrial process. In this paper, several experiments are conducted via reaction calorimetry to validate that both sulfuric and propionic acids have discernible catalytic effects on the reaction. This finding complicates the accurate description of the reaction kinetics through traditional methods. So this paper turns to a kinetic-free black-box model, Gaussian process regression (GPR) model via 24 experiments, as a more adaptable approach. Besides, the best GPR model is combined with traditional heat balance model to generate a hybrid gray-box model, which can give complete knowledge of reaction process. The hybrid gray-box model finally achieves maximum root-mean-square error (RMSE) of 0.0069 for conversion, 0.6535 for temperature, and 10.6087 for heat flow rate, underscoring its pretty good predictive ability.
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MEASUREMENT SCIENCE and TECHNOLOGY
·
2025
·Vol. 36
·期 3
·035110
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IF 3.4
Qianchun Zhang,Chengcheng Wan,Jiumei He,Zhaoru Ban,Shan Tang,Li Jiang,Yanju Chen,Xixi Long
In this study, mesoporous MgO nanoparticles were successfully synthesized using carbon quantum dots as templates and an outstanding cataluminescence sensor system was established based on these nanoparticles. In a particular situation, the constructed sensor demonstrated remarkable linear range was 0.3106–310.6 ppm (R2 = 0.9990) with a low limit of detection of 0.0994 ppm and a signal-to-noise ratio (S/N) of 3. The mesoporous MgO nanoparticle sensor was utilized to analyze the isobutyraldehyde content in real samples. Outstanding recoveries were achieved within range of 83.4%–111%, with the relative standard deviations (n = 7) ranging from 2.0% to 8.2%. Moreover, the 35 d test results showed that the sensor has good stability. Density functional theory and gas chromatography-mass spectrometry were used to research the mechanism of the designed cataluminescence sensor. This work presents a universal methodology for constructing isobutyraldehyde gas sensors with high sensitivity and selectivity, and mesoporous MgO nanoparticles sensors that expand the applications available in the industry and environment analysis.
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ACS Applied Nano Materials
·
2024
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IF 5.3
Qianchun Zhang,Yuxian Zhao,Zhaoru Ban,Li Jiang,Shan Tang
Cataluminescence (CTL) sensors are among the most simple, inexpensive, sensitive, and selective tools for gas sensing. This study presented a highly efficient and selective CTL sensor system based on mesoporous SiO2 nanomicrospheres for the quick and sensitive analysis of isobutyraldehyde. Furthermore, its response intensity was 12.7 times higher than that of a nonmesoporous SiO2-based sensor. The constructed CTL sensor exhibited a good linear range (R2 = 0.997) for detecting isobutyraldehyde, spanning 3.11–311 ppm, with a low detection limit of 1.1 ppm. This enabled successful analysis of trace isobutyraldehyde in real samples. Finally, the CTL mechanism of this sensor was further explored. This study presents an approach for the quality detection of an important volatile organic compound, isobutyraldehyde, by a mesoporous-based CTL sensor.
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Reaction Kinetics Mechanisms and Catalysis
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2025
·
IF 1.7
Yu Peng,Zhang Rui
Solid acid catalysts containing both Brønsted acidic and Lewis acidic sites were hydrothermally prepared in this work to convert glucose into 5-hydroxymethylfurfural (5-HMF). A series of catalysts was synthesized by combining metal salts (CuSO 4 , ZrOCl 2 , Al 2 (SO 4 ) 3 , Co (NO 3 ) 2 ) with 2,4,6-trimethylbenzene-1,3,5-trimethylphosphonic acid (H 6 L) as a ligand in a hydrothermal reaction. Additionally, either 2,2-bipyridyl or 4,4-bipyridyl was added as an auxiliary ligand to adjust the internal structure and enhance the Brønsted acid strength of the catalyst, resulting in solid acid catalysts with varying Lewis acid site content. Catalyst characterization demonstrated that 4,4-bipyridine was more effective in enhancing Brønsted acid strength compared to 2,2-bipyridine. Glucose dehydration was performed to synthesize 5-HMF in a two-phase reaction solvent composed of saturated brine, sec-butanol, and methyl isobutyl ketone (1:1.6:4 ratio) at 463 K. The experiments results indicated that the CoL4 catalyst achieved a conversion yield of 89.1% and exhibited excellent thermal stability. The present study emphasizes the comparison and selection of bipotent acid solid catalysts containing different metal active sites for light use in the dehydration of glucose to 5-HMF.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2024
·
IF 5.3
Yanbo Liu,Xiaolei Wang,Chenyang Zhao,Shuo Wang,Xiaogang Lian,Weiqi Chen,Lei He,Mingyang Chen,Songgu Wu,Junbo Gong
Tenofovir amibufenamide fumarate (TMF) is the first oral drug developed in Asia for the treatment of adult patients with chronic viral hepatitis B, however, further applications are limited by poor tableting performance and high sticking propensity. In this work, the spherulitic growth process of TMF has been designed and explored with the help of molecular dynamics simulation and process analysis technologies (ATR-FTIR, FBRM and EasyViewer). The spherical particles with high bulk density, good flowability and uniform particle size distribution are prepared by a simple quenching process. More importantly, experimental results show that spherical particles have higher average tensile strength (100.8% increase), higher plastic deformability and lower amount of punch sticking (87.4% decrease in 30 tablets) compared to the commercial powder products. These contributions not only shed light on the design principle of drug spherulitic growth processes, but also provide guidance for the manufacture of high-quality tablet products.
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CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Yi Yi,Pengxiang Zhang,Yixin Shen,Junhui Tan,Bao-Wen Li
Solution-processable high-k perovskite nanosheets show considerable potential for applications in printed electronics due to their unique structural properties and exceptional physical characteristics. However, their dispersibility and compatibility in various organic solvents remain insufficiently understood, with a lack of systematic investigation, which restricts their broader application potential. In this study, the dispersion behavior of high-k perovskite nanosheets, specifically Ca2Nb3O10 (CNO) and Ca2NaNb4O13 (CNNO), was examined in 20 different organic solvents. By correlating the physicochemical properties of these solvents, including surface tension, dielectric constant, and empirical solvent parameters, with Hildebrand and Hansen solubility models, we identified the underlying solvent–nanosheet interaction mechanisms responsible for dispersion stability. Polar protic solvents, such as water and methanol (MeOH), as well as polar aprotic solvents, like dimethyl sulfoxide (DMSO), acetonitrile (ACN), N,N-dimethylformamide (DMF), propylene carbonate (PC), and N-methyl-2-pyrrolidone (NMP), facilitate uniform and stable nanosheet dispersions. These solvents promote dispersion stability through strong dipole–dipole interactions and moderate surface tension matching. Based on these findings, we developed a series of organic solvent-based inks incorporating high-k perovskite nanosheets, demonstrating excellent printing adaptability for electrical device fabrication, and achieving stable device performance. This work provides a comprehensive library of organic solvents that effectively disperse high-k perovskite nanosheets, thereby broadening their potential applications in printed electronic devices.
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Nature Communications
·
2025
·Vol. 16
·期 1
·10062
·
IF 15.7
Tian Dehua,Liang Yinlan,Zheng Zhaoke,Mao Liang,Cai Xiaoyan,Chen Yizhen,Wang Xiangxian,Liu Xiaolei,Li Juan,Wang Zeyan,Xue Can,Li Baojun,Lou Zaizhu
Photocatalytic methanol dehydration to dimethyl ether (DME) offers a sustainable alternative to energy-intensive thermocatalysis, yet its practical application remains constrained by low efficiency. Herein, we designed Ni-doped plasmonic W 18 O 49 nanowires that synergistically integrates low-coordinated W and Ni dual active sites with surface plasmon resonance for enhanced photocatalytic performance. The synergistic effect of W and Ni dual sites is amplified by plasmonic electron oscillations to facilitate the C-O bond cleavage and C-O-C coupling, driving efficient methanol-to-DME conversion. The optimized Ni 0.66 -W 18 O 49 achieves a DME yield of 133.7 ± 3.3 mmol g -1 h -1 with 98.7% selectivity under 400 mW cm -2 illumination. The versatility of the catalyst is demonstrated through C 2+ alcohol dehydration, achieving 40-80% rate enhancements and a recorded isobutylene yield of 3.7 mol g -1 h -1 . This study highlights the huge potential of rationally engineered plasmonic semiconductors in solar-driven chemical synthesis, particularly for C-O bond activation and coupling reactions.
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