JOURNAL OF CHEMICAL THERMODYNAMICS
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2024
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IF 2.2
Jing Xia,Zhigao Sun
Thermodynamic inhibitors may be used to inhibit hydrate formation in industry. Alcohol substances, due to their hydrophilic hydroxyl groups in their molecular structure, are prone to form hydrogen bond with water molecules to inhibit hydrate formation. In this work, sec -butyl alcohol is chosen to study the effects on CO 2 hydrate dissociation equilibrium conditions, where the step-heating method is utilized to obtain hydrate equilibrium conditions. The equilibrium curve of carbon dioxide hydrate dissociation moves to the region of lower temperatures or higher pressures. The higher mass fraction of sec -butyl alcohol, the better effect of inhibiting hydrate formation. Sec-butyl alcohol can be used as a thermodynamic hydrate inhibitor.
研究领域:
化学工程
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物理化学
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高影响因子
CHEMISTRY OF MATERIALS
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2025
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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
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2025
·Vol. 16
·期 1
·10062
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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.
研究领域:
光催化
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材料科学
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等离激元学
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可持续化学
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化学合成
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PubMed
高影响因子
CARBOHYDRATE RESEARCH
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2026
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IF 2.5
Wang Zhao,Jiansong Chen,Haishun Du,Zhiqiang Pang,Weiqi Wei,Xuejun Pan
Furfural is a pivotal intermediate in the biomass conversion. Therefore, the production of furfural from xylose or xylose-rich biomass has received extensive attention. Herein, a series of boron phosphate solid acid catalysts (BPs) were synthesized by self-assembly and high-temperature calcination, and used for the production of furfural from xylose or xylose-rich biomass. The results showed that the synthesized BPs was spherical nanoparticles and containing both Lewis acid and Brønsted acid sites, which was excellent for xylose conversion to furfural. The maximum furfural yield of this work was 82.8 % and achieved through 95.7 % xylose conversion by using 20 mg BP 1.25 at a reaction temperature of 130 °C for 120 min with a LiBr⋅3H 2 O/dichloromethane (DCM) biphasic system. Noteworthy, the recycling experiments indicated that both the BP 1.25 catalyst and the LiBr⋅3H 2 O can be reused at least four times with a furfural yield remaining ≥61.7 %. Last but not least, the prepared BP 1.25 catalyst also displayed high efficiency for xylose-rich natural biomass such as corncob and bagasse conversion into furfural. The work not only developed a new system for easy conversion of xylose into furfural, but also realized the high yield production of furfural from natural biomass without components separation.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Wenkun Chen,Zhen Xu,Jin Dai,Yitao Liu,Jianyong Yu,Shude Liu,Bin Ding
Materials with excellent thermal resistance and infrared stealth capability have broad application potential in aerospace, national defense and military industries. Ceramic fiber aerogels are widely adopted infrared stealth materials owing to their outstanding high temperature resistance, low thermal conductivity, low bulk density and chemical stability. However, as advanced equipment continues to evolve, the environmental temperature encountered by some stealth materials exceeds 1500 °C. Existing aerogel materials are prone to structural collapse under such harsh conditions. This issue remains unresolved. Herein, ceramic fiber materials are successfully fabricated through a novel spinning process and an intracrystalline structure design strategy within fibers. These materials maintain excellent mechanical properties at 1700 °C. Subsequently, infrared stealth devices with excellent comprehensive performance are obtained by assembling three layered components. The bottom component is an aerogel with a self-locking micro/nanofiber structure. The middle component is an aerogel with a binary architecture composed of micro/nanofibers and SiC nanoparticles. The top component is an aluminum foil bonded to the middle component. Under an ultra-high temperature of 1700 °C, the cold surface exhibits an infrared radiation temperature of only 55 °C. Successful infrared stealth is achieved in extreme environments. After exposure to large temperature gradients from liquid nitrogen for 30 min to 1700 °C for 30 min, the devices still maintain excellent mechanical properties. Furthermore, they withstand 1000 cycles of compressive and shear deformation at 50% strain without dissociation under high-frequency vibration. This new generation of infrared stealth devices with outstanding structural stability, temperature resistance and thermal insulation capability can provide reliable safety protection for equipment and personnel.
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MOLECULES
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2024
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IF 4.2
Qianchun Zhang,Xixi Long,Shan Tang,Li Jiang,Zhaoru Ban,Yanju Chen,Runkun Zhang
A simple, rapid, and reliable method for detecting harmful gases is urgently required in environmental security fields. In this study, a highly effective cataluminescence sensor based on SiO 2 /MIL-53(Al) composites was developed to detect trace isobutylaldehyde. The sensor was designed using isobutylaldehyde to generate an interesting cataluminescence phenomenon in SiO 2 /MIL-53(Al). Under optimized conditions, a positive linear relationship was observed between the signal intensity of the cataluminescence and isobutylaldehyde concentration. The isobutylaldehyde concentration range of 1.55–310 ppm responded well to the sensing test, with an excellent correlation coefficient of 0.9996. The minimum detectable concentration signal-to-noise ratio ( S/N = 3) was found to be 0.49 ppm. In addition, the sensor was effectively utilized for analyzing trace isobutylaldehyde; the analysis resulted in recoveries ranging from 83.4% to 105%, with relative standard deviations ( RSDs ) of 4.8% to 9.4%. Furthermore, the mechanism of cataluminescence between SiO 2 /MIL-53(Al) and isobutylaldehyde was explored using GC–MS analysis and density functional theory. We expect that this cataluminescence methodology will provide an approach for the environmental monitoring of isobutylaldehyde.
研究领域:
环境科学
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材料科学
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化学
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PubMed
高影响因子
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.
研究领域:
化学工程
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能源与燃料
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催化
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环境科学
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高影响因子
FUEL
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2024
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IF 6.7
Hongbin Xia,Yuxin Wang,Rui Xia,Xinyang Xiong,Guangwen Xu,Jinggang Zhao,Jun Zhou,Lei Shi
An acetate-functionalized heterogeneous catalyst, N + -(Ac), was successfully synthesized via directed substitution of an inert site in quaternary ammonium resin by a weak-base active center and applied to the transesterification of dimethyl oxalate (DMO) with ethanol to prepare diethyl oxalate (DEO). When the optimal N + -(Ac) catalyst catalyzed the DMO transesterification with ethanol for 2 h, the DMO conversion, DEO yield, and corresponding turnover frequency (TOF) reached 93.4%, 49.7%, and 13.04 h −1 , respectively. Additionally, the synthesized N + -(Ac) exhibited catalytic universality for DMO transesterification with different alcohols, and the catalytic efficiency decreased with increasing difficulty of cleaving the hydrogen–oxygen bond from C 2 to C 4 and steric hindrance of isomeric alcohols. The pretreatment experiments of catalyst with different water content and raw materials were designed and the resin matrix, fresh catalyst, deactivated catalyst and regenerated sample were systematically analyzed using various characterization techniques to investigate the catalytic deactivation mechanism of the transesterification reaction between DMO and ethanol to synthesize DEO. The results showed that DMO played a key role in catalyst deactivation and the catalyst was deactivated upon replacement of the active sites by monomethyl oxalate anions from hydrolysis side reaction of DMO. Finally, an efficient raw material regeneration strategy for the catalyst was proposed. Herein, new theoretical support is introduced for the structural evolution of weak-base catalysts and will aid in developing heterogeneous catalysts for oxalate transesterification.
研究领域:
化学工程
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催化科学
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高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2024
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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.
研究领域:
药学
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结晶工程
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材料科学
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药物开发
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PubMed
高影响因子
ACS Applied Nano Materials
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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.
研究领域:
材料科学
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分析化学
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高影响因子
MEASUREMENT SCIENCE and TECHNOLOGY
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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.
研究领域:
材料科学
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环境分析化学
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高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2025
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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.
研究领域:
化学工程
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催化化学
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高影响因子
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