JOURNAL OF CHEMICAL THERMODYNAMICS
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2019
·
IF 2.29
Xuzhao Yang,Jun Wang,Yun Fang
Experimental s olubility of D-(+)-glucose and D-(−)-fructose in three asymmetrical dicationic ionic liquids (DILs), 1-(3-(trimethylammonio)prop-1-yl)-3-methylimidazolium bis(dicyanamide) ([MIMC 3 N 111 ][N(CN) 2 ] 2 ), 1-(3-(trimethylammonio)prop-1-yl)-1-methylpiperidinium bis(dicyanamide) ([MPiC 3 N 111 ][N(CN) 2 ] 2 ) and 1-(3-(trimethylammonio)prop-1-yl)pyridinium bis(dicyanamide) ([PyC 3 N 111 ][N(CN) 2 ] 2 ), was determined through an isothermal technique from 323.15 K to 353.15 K at 0.1 MPa. The solubility of the two sugars in selected DILs increased with elevating temperature and the solubility decreased in the following order: D-(−)-fructose > D-(+)-glucose. The Apelblat, λh , NRTL, Wilson and UINQUAC models were respectively employed to correlate the experimental solubility values with temperature. The thermodynamics of dissolution of D-(+)-glucose and D-(−)-fructose in the studied DILs, enthalpy of dissolution (Δ diss 0 H ), Gibbs energy of dissolution (Δ diss 0 G ) and entropy of dissolution (Δ diss 0 S ), were also evaluated based on the experimental solubility data. The results indicated that enthalpic contributions were dominant in the dissolution process of D-(+)-glucose and D-(−)-fructose in those DILs.
研究领域:
物理化学
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溶液化学
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热力学
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绿色溶剂
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碳水化合物化学
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
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IF 8.328
Jing Guo,Shanhui Zhu,Youliang Cen,Zhangfeng Qin,Jianguo Wang,Weibin Fan
A series of ordered mesoporous Nb x W (8 − x) oxides with tunable Nb/W ratio were successfully synthesized by evaporation-induced self-assembly method. The mesoporous structure, morphologies, surface chemical state, and acidic properties of these catalysts were fully characterized by low-temperature sorption of N 2 , small-angle and wide-angle XRD, TEM, Raman, XPS, and Py-IR. It was shown that the Nb x W (8 − x) oxides created large amounts of Lewis as well as Brønsted acid sites, which promoted the isomerization of glucose to fructose followed its dehydration to 5-hydroxymethylfurfural (HMF). Mannose was also formed via the epimerization of glucose. Of them, the mesoporous Nb 4 W 4 exhibited the best catalytic activity with a comparatively low E a about 90.2 kJ/mol and good stability in aqueous medium. The kinetic behavior revealed that Lewis acid sites facilitated to glucose-to-fructose isomerization while Brønsted acid sites promoted the dehydration of fructose to form HMF.
研究领域:
催化化学
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生物质转化
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绿色化学
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多相催化
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材料化学
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碳水化合物化学
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JOURNAL OF FOOD PROCESS ENGINEERING
·
2026
·Vol. 49
·期 7
·e70700
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IF 3.5
Yi Yang,Shutian Ma,Jinyuan Zhang,Manling Zhang,Hongyu Zou,Zhuang Shi,Jinglin Zhang,Zhenyu Wang,Yuang Zhang,Liming Zhang,Enjie Diao
This study investigated the effects of moderate germination (4°C, 65%–75% RH, sprout length less than 1 cm) on the physicochemical properties and antioxidant capacity of raw and aged black garlics. Moderate germination significantly increased the contents of fructose, glucose, alliin, allicin, total flavonoids in raw garlic, which improved by 33.68%, 31.47%, 5.61%, 38.21%, and 90.91%, respectively. It also resulted in the obvious rise in alliin, total polyphenols, and total flavonoids in black garlic aged from germinated raw garlic, and rose by 29.01%, 26.96%, and 51.22%, respectively. The antioxidant capacity of germinated raw garlic and its aged black garlic was also significantly improved. While germination promoted the formation of 5-hydroxymethylfurfural (5-HMF) (increased by 55.47%) and inhibited the production of acrylamide (decreased by 49.91%) in aged black garlic. It did not significantly affect the color of raw and aged black garlics. Moderate germination is an excellent strategy to improve the nutritional contents and antioxidant capacity of raw and aged black garlics, which displays a promising alternative for developing functional foods from moderately germinated raw garlic and its aged product.
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LANGMUIR
·
2026
·Vol. 42
·期 30
·22403-22412
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IF 4.4
Cai Jixiang,Zhao Haiyan,Qin Jiannan,Li Mingfu,Zhang Pingjun,Jiang Liqun
Metal–organic frameworks (MOFs) represent promising
platforms
for enzyme immobilization; however, the interplay between surface
chemical heterogeneity and defect density in dictating adsorption
efficiency remains poorly understood. Herein, we systematically investigated
the immobilization of glucose isomerase (GI) on three UiO-66 variants,
indicating that the acetic acid (AA)-modified UiO-66 (UiO-66-AA) achieved
the highest enzyme loading efficiency of 92.8% and activity recovery
of 84.2%, markedly outperforming both pristine UiO-66 and formic acid-modified
UiO-66 (UiO-66-FA). The resulting UiO-66-AA-GI composite achieved
the highest fructose yield of 37.7% with an excellent selectivity
of 94.8% under optimal conditions and retained stable performance
over five recycling cycles. Comprehensive characterization demonstrates
that acetate modification generates a distinctive chemical mosaic
surface, in which hydrophobic methyl domains and residual carboxyl
groups synergistically enable multimodal adsorption via hydrophobic
interactions, hydrogen bonding, and weak electrostatic forces. This
unique surface chemistry, combined with the largest external surface
area, maximizes GI loading while preserving the catalytic activity.
These findings establish that rationally designed surface chemical
mosaics with complementary interaction modes are critical for achieving
high-efficiency enzyme immobilization in MOF-based biocatalysts.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Jinlan Yang,Habib Khan,Chushi Chen,Meng Wang,Lina Xiu,Li Yang
Paper-based analytical devices (PADs) have revolutionized environmental monitoring, food safety and disease diagnosis due to their inherent portability, simplicity, and cost-efficiency. Among these, distance-based PADs enable instrument-free quantitative detection by translating target concentration into measurable flow distance. Stimuli-responsive hydrogels, whose viscosity can be altered by target-triggered sol-gel transitions, are widely used in distance-based PADs, among which click-chemistry hydrogels stand out by virtue of their efficient and stable covalent bonding. Such stable covalent networks provide click hydrogels with strong anti-swelling and anti-degradation properties, crucial for reliable performance in on-site environments. In this study, we present a novel distance-based PAD approach that integrates target-induced click hydrogels, establishing a highly stable, versatile, and sensitive platform for multi-analyte detection. This innovative PAD makes use of copper-catalyzed azide-alkyne cycloaddition click chemistry to craft hydrogels from polyethylene glycol derivatives. Notably, specific target analytes like Cu²⁺, ascorbic acid, alkaline phosphatase, and pyrophosphate finely modulate the hydrogel crosslinking degree, causing noticeable changes in its viscosity. These viscosity variations are then translated into measurable flow distances on pH test papers, providing a direct and quantitative visual readout without the need for complex instrumentation or extensive operation. The entire detection process, from sample loading to result readout, can be accomplished within approximately 5 min, demonstrating the rapid analysis capability of this approach. This work offers stable, rapid, sensitive, and cost-effective multi-target detection, significantly advancing instrument-free PAD technology and expanding the scope of versatile analyte detection.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Yangyang Chen,Vijaya Raghavan,Mouming Zhao,Qiangzhong Zhao
A matrix-mimicking model strategy enables quantitative attribution of browning routes in fermented vegetables. • Ascorbic acid degradation dominated early browning and Maillard reaction dominated late. • SEM quantified Maillard reaction as the strongest direct driver of browning. • Findings translate into practical control levers for shelf-life stabilization and waste reduction in fermented products. Non-enzymatic browning during storage devalues pickled vegetables, yet roles of the Maillard reaction (MR), ascorbic acid (AA) degradation, sugar degradation and phenolic oxidation are unclear. Fourteen defined model systems (M1-M14) mimicking cowpea pickles composition were incubated at 45 °C for 40 d. Browning index and reactants, intermediates, and products were tracked. Pronounced visible browning and BI increases were mainly observed when amino acids and sugars coexisted (M3-M14), whereas amino acids (M1) or sugars (M2) alone showed limited discoloration. AA was nearly depleted by day 20 and 3-hydroxy-2-pyranone peaked at day 10 then vanished, indicating an early AA driven phase. 5-Hydroxymethylfurfural accumulated in all sugar-containing systems (16.16–98.73 μg/g at day 40) and increased continuously, marking late-stage browning. Redundancy analysis (96.75% variance) and structural equation modeling identified AA degradation (0.72) and MR (0.89) as dominant direct drivers. These results provide time-resolved compositional targets to mitigate discoloration in fermented vegetables for better quality preservation. Download: Download high-res image (129KB) Download: Download full-size image
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ADVANCED MATERIALS
·
2026
·
IF 29.1
Kaiyue Zhang,Qunfeng Cheng,Mingzhu Li
Electrophoretic colloidal crystal displays (ECCDs) hold great potential in next-generation sustainable, low-energy full-color reflective displays, yet their practical development has been hindered by sluggish switching dynamics and poor operability at low temperatures. Here, we report a wide-temperature, low-power electrophoretic color display based on tailored carbon shell-coated polystyrene nanospheres (PS@C) in a modified deep-eutectic-solvent (MDES) dielectric medium. Under an applied electric field, PS@C nanospheres form highly ordered 3D colloidal crystals with ideal stopbands due to their narrow size distribution and high effective refractive index (∼1.67). Mimicking melanin-based photonic structures in peacock feathers, the PS@C nanospheres enable vivid structural colors with high purity and brightness. The system exhibits dynamic color switching from a dark-brown off-state to full-color states. It also enables reversible red-to-blue color modulation over a spectral range of 160 nm, with a fast tuning rate of ∼267 nm s −1 . The MDES-mediated ECCD demonstrates reliable device operation over a wide temperature range from 45°C down to −20°C. This presents unique application prospects in fields such as cold-chain logistics displays and outdoor electronic tags in cold regions.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yinuo Liu,Zhengyuan Dai,Ying Wang,Shanshan Fu,Xiaoyu Yang,Jingcui Huang,Li Li,Yaping Ding
Ratiometric probe (blue/yellow CDs) offers visual color change and improved accuracy. • Molecularly imprinted polymers provide high selectivity against food interferents. • Smartphone with Color Picker App enables on-site visual quantitative detection. • Successfully applied to milk and ice cream with recoveries of 95.6–104.2%. A ratiometric fluorescence sensor (B-CDs@MIPs/Y-CDs) based on blue/yellow dual-emission carbon dots and molecularly imprinted polymers was constructed for visual detection of vanillin. The addition of vanillin resulted in selective quenching of the blue fluorescence of B-CDs at 438 nm via static quenching, whereas the yellow emission at 542 nm stayed constant, leading to a progressive color shift from blue to green and ultimately to yellow. Under optimized conditions, the linear range was 2.0–120.0 μM with a detection limit of 0.22 μM. Recoveries from spiked milk and ice cream samples ranged from 95.6% to 104.2% (RSD < 1.77%). Combined with a smartphone using the Color Picker App for RGB analysis, rapid visual detection was achieved. This method is low-cost, easy to operate, and sensitive, showing great potential for food safety monitoring. Download: Download high-res image (125KB) Download: Download full-size image
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Ming Zhang,Bin Wang,Ishtiaq Ahmad,Jifang Miao,Shiguo Chen,Xingqian Ye
Chemical and flavor characteristics of Lingmu tea were systematically analyzed. • Processing reshaped aroma via redistribution of key odor-active compounds. • Taste profile changed with amino acids, organic acids, and polyphenols. • Antioxidant mechanism shifted from radical scavenging to reducing capacity. Lingmu tea is a traditional non- Camellia beverage, yet its chemical basis and processing-induced changes remain unclear. This study investigated the effects of processing on its composition, flavor, and antioxidant properties using metabolomic and sensory analyses. Processing significantly reduced free amino acids and flavan-3-ols such as epigallocatechin, while increasing complex polyphenols including terchebin and trigalloyllevoglucosan. Organic acids such as gallic acid and lactic acid also increased. Volatile analysis based on relative odor activity values showed that linalool (ROAV = 100) was the dominant aroma contributor in fresh leaves, whereas 1-octen-3-one (ROAV = 100) and dimethyl sulfide (ROAV = 61.75) showed higher contributions after processing. Notably, antioxidant activity exhibited a mechanistic shift from rapid radical scavenging to enhanced overall reducing capacity. These findings provide insights into the compositional and functional transformation of Lingmu tea during processing. Download: Download high-res image (139KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yuying Wang,Xiutao Yang,Guopeng Zhu,Haibin Niu,Shaoqing Zhang,Quanying Wang,Hongwen Yu
The accurate non-enzymatic electrochemical detection of glucose is constrained by sluggish charge transfer kinetics and non-optimized adsorption of reaction intermediates on single-phase transition metal oxide. Herein, we rationally design heterojunction Co 3 O 4 /NiMoO 4 hierarchical arrays, where a spontaneous built-in electric field (BEF) is formed at the p-n hereo-interface due to the precise work function difference in NiMoO 4 and Co 3 O 4 . This BEF directionally drives electrons from NiMoO 4 to Co 3 O 4 at 0.16 |e|, as confirmed by DFT charge density and Bader charge analysis, thereby accelerating glucose electrocatalytic oxidation kinetics. Moreover, the hierarchical structure of Co 3 O 4 nanoneedles grown on NiMoO 4 nanorods enhances the electrochemical active area and introduces dual catalytic sites of Co and Ni atoms, whose d-band centers are modulated to weaken excessive adsorption at Co sites while maintaining Ni activity. As a results, the assembled sensor achieves an ultrahigh sensitivity of 28,470 μA mM −1 cm −2 , a low detection limit of 0.396 μM and excellent recovery rates (94.6%–105.6%) in complex real samples. This work demonstrates that resolving the charge transfer and adsorption trade-off via BEF-engineered heterostructure offers a generalizable route for high-performance sensing. Download: Download high-res image (156KB) Download: Download full-size image
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Catalysts
·
2026
·Vol. 16
·期 7
·613
·
IF 4.5
Xin Wang,Yunkai Zhou,Qingsong Wang,Dongxue Liang,Wenjia Li,Zhou Zhang,Mingqiang Zhu,Jia Wang
Hydrolysis of cellulose to produce ethanol has become an effective way to utilize biological resources, but its large-scale industrial application has been limited. In this study, a one-pot catalytic conversion process for transforming cellulose into ethanol was developed. Meanwhile, multifunctional Mo/Pt/WOx/Al2O3catalysts were prepared by loading nano-alumina (Nano-Al2O3) via a stepwise impregnation method. The influence of catalysts with varying metal ratios on the types of products generated during the cellulose hydrolysis process to ethanol was examined. The catalyst with 0.1% Mo, 2% Pt, and 7.5% W loadings showed the best selectivity. With an ethanol yield of 45.3% after heating at 5 MPa H2and 518 K for 2 h. Nano-Al2O3can provide suitable active sites. The addition of W5+and Mo0increased the surface oxygen vacancy density and enhanced the hydrodeoxidation and metal anchoring capacity of the catalyst. The solid solution structure facilitates electron transfer from W and Mo atoms to Pt atoms, forming electron-rich Ptδ-species, promoting the hydrolysis of cellulose and the formation of ethanol.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 8
·522
·
IF 5.4
Qiao Yuchun,Wu Yiying,He Jiahui,Chen Wen,Fan Jiaqi,Zhang Zhicong,Shen Jialu,Su Mengping,Wang Qidong,Li Shuai,Shen Yingjie,Shang Jizhen,Wang Hua
Glucose is a vital energy source, and its accurate monitoring is crucial for the diagnosis and management of metabolic diseases. Herein, we report a simple colorimetric sensing platform for glucose detection based on MnO 2 /Au-Ag nanozymes, glucose oxidase (GOx), and 3,3′,5,5′-tetramethylbenzidine (TMB). In this cascade system, GOx catalyzes the oxidation of glucose to generate H 2 O 2 , which is subsequently decomposed by MnO 2 /Au-Ag to produce reactive species that oxidize TMB, yielding a visible blue signal. The incorporation of Au-Ag nanoparticles provides additional catalytic sites and promotes interfacial electron transfer, thereby enhancing the catalytic performance of MnO 2 . The platform exhibits a linear response over 0.025-0.20 mM with a detection limit of 0.012 mM. It enables reliable glucose detection in artificial sweat and 80-fold diluted serum samples. In addition, portable nitrocellulose test strips were developed for visual and smartphone-assisted glucose detection. This strategy provides a simple and portable approach for low-concentration glucose analysis and offers potential for point-of-care applications after further validation. Graphical
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