MOLECULES
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2024
·Vol. 29
·期 22
·5251
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IF 4.2
Yangyang Xie,Honglei Fan,Mingyang Che,Ya Liu,Chunjing Liu,Xin Hu,Botao Teng
Adsorbing and recycling alcohols and acids from industrial wastewater is of great significance in wastewater treatment; establishing the possible quantitative relationship of alcohol–acid adsorption capacity with the struct0ures of adsorbents and exploring the key factors determining their adsorption performance is very important and challenging in environment science. To solve this difficult problem, the adsorption of C1-5 alcohols, C2-4 acids, and Fischer–Tropsch synthesis (FTS) wastewater on zeolites with similar hydrophobicity and pore structures (β and MFI), similar hydrophilicity but different pore structures (Y and MOR), and similar pore structures but significant differences in hydrophobicity (MOR vs. β and MFI) was systematically investigated. It was found that: (1) For materials with similar pore structures, increased hydrophobicity correlates with enhanced adsorption capacities for alcohols and acids. (2) For materials with similar hydrophobicity, a higher content of ultramicropores leads to increased adsorption of alcohols and acids. (3) Between pore structure and hydrophobicity, it is hydrophobicity that ultimately plays a decisive role in adsorption capacities. The adsorption behavior of zeolites in FTS wastewater exhibits a consistent trend, with β-zeolite demonstrating the highest hydrophobicity (contact angle of 105°) and the greatest adsorption capacity in FTS wastewater, achieving 103 mg/g. Following five adsorption–desorption cycles, the zeolites retained their adsorption capacity without significant degradation, indicating their excellent stability and reusability. The findings identify the critical factors determining adsorption performance and provide a solid foundation for the design and development of high-performance adsorbents for alcohol–acid adsorption.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
JOURNAL OF FOOD SCIENCE
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2024
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IF 3.2
Mibin Lin,Jia Sha,Zhonghao Zhu,Penghui Ye,Kai Zhao,Kaijun Xiao
Metal–organic frameworks (MOFs) have great potential for the adsorption of minor molecular alcohols in the vapor phase. However, the drawbacks of powdered MOFs, including low recyclability and problematic separation, limit their application in fermented wine. Chitosan (CS) is a low-cost, eco-friendly, moldable matrix used in the food industry. In this study, a novel CS@ZIF-8 adsorbent with excellent microporous surface area was successfully synthesized by incorporating hydrophobic ZIF-8 into CS. The results showed that CS@ZIF-8 beads had a high adsorption affinity for methanol at a Zn 2+ /2-methylimidazole molar ratio of 1:5. The adsorption mechanism of methanol on CS@ZIF-8 beads was systematically studied by X-ray photoelectron spectroscopy, isotherms, and kinetics. The Langmuir model calculated the maximum adsorption of methanol to 56.8 mg/g. Adsorption kinetics are consistent with pseudo-second-order models. Furthermore, CS@ZIF-8 beads presented excellent recyclability for removing methanol for five consecutive cycles. It could treat 60 bed volumes of Chinese yellow wine in column filtration experiments to make the concentration below 50 mg/L. In summary, the highly efficient CS@ZIF-8 adsorbent has great potential for methanol adsorption from fermented wines. Practical Application Methanol will exhibit adverse symptoms such as weakness and headaches after it is ingested. Therefore, methanol control is an important safety factor in the production of fermented wine. The adsorption method is recognized as a widely used technique due to its high efficiency and selectivity. The CS@ZIF-8 adsorbent synthesized in this paper provides a new idea for methanol removal.
研究领域:
食品科学
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材料科学
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PubMed
高影响因子
BIOINORGANIC CHEMISTRY AND APPLICATIONS
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2021
·
IF 7.778
Wen Liu,Tong-Tong Wang,Xiao-Luan Tang,Fei-Ya Jiang,Xiao Yan,Jun Deng
In this work, quercetin was loaded in the highly-porous lactose via the adsorption of quercetin molecules in ethanol. The method aims to improve the quercetin solubility and the loading capacity of lactose. The method relates to the synthesis of the highly-porous lactose with a particle size of ∼35 μm, a mean pore width of ∼30 nm, a BET surface area of 35.0561 ± 0.4613 m2/g, and a BJH pore volume of ∼0.075346 cc/g. After the quercetin loading in ethanol, BET surface area and BJH pore volume of porous lactose were reduced to 28.8735 ± 0.3526 m2/g and 0.073315 cc/g, respectively. The reduction rate was based on the quercetin loading efficiency of highly-porous lactose. DSC analysis and XRD analysis suggest that the sediments of quercetin in the nanopores of porous lactose are crystalline. FTIR spectroscopy results suggest that there is no significant interaction between quercetin and lactose. The highly-porous lactose had a higher loading efficiency of 20.3% (w/w) compared to the α-lactose (with 5.2% w/w). The release rates of quercetin from the highly-porous lactose tablets were faster compared to the conventional α-lactose carrier.
研究领域:
药剂学
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食品科学
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材料科学
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Likun Yang,Hua Yuan,Yongjie Shi,Shengping Wang,Xinbin Ma
An efficient alcohol adsorbent has been prepared by the NaOH etching of Na-FAU zeolite and applied for the deep removal of the alcohol from FT-mixed olefins. Due to the NaOH etching, the adsorption capacity of the NaX-2 adsorbent (85 mg/g) for n-butanol was significantly higher than the NaX adsorbent (42 mg/g). As demonstrated by SEM, 29 Si NMR, 27 Al-NMR, CO 2 -TPD, and N 2 adsorption–desorption, the etching of zeolite NaX occurs at the grain boundary, which leads to more mesopores, increased weak base sites, and Si(3Al) structure formation by alkali etching, facilitating alcohol diffusion and improving the adsorption through hydrogen bonding. In-situ FTIR and molecular simulations were employed to demonstrate the adsorption models of alcohols over Na-FAU zeolite. The hydrogen bonding network formed by dealumination finally enhances the alcohol adsorption by the hydrogen bonding by O al -H al ‧‧‧O zeo and O zeo -H zeo ‧‧‧O al . This work provides a facile preparation method for removing trace alcohol from olefins, giving promising guidance for industrial applications.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2025
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IF 3.7
Su Changqing,Jiang Wentao,Guo Yang,Yi Guodong,Li Zengxing,Li Huan
The objective of this study was to identify and synthesize functional groups for the efficient adsorption of volatile organic compounds (VOCs) through a combination of theoretical calculations, molecular design, and experimental validation. The density functional theory (DFT) calculation, focusing on the P-containing functional groups, showed that methanol adsorption was dominated by the electrostatic interaction between the carbon surface and methanol, while toluene was mainly trapped through π-π dispersive interaction between toluene molecule and functional group structure. The experimental results showed the phosphorus-doped carbon materials (PCAC) prepared by directly activating potassium phytate had a phosphorus content of up to 4.5 at.%, mainly in the form of C—O—P(O)(OH) 2 . The material exhibited a high specific area (987.6 m 2 ·g –1 ) and a large adsorption capacity for methanol (440.0 mg·g –1 ) and toluene (350.1 mg·g –1 ). These properties were superior to those of the specific commercial activated carbon (CAC) sample used for comparison in this study. The adsorption efficiencies per unit specific surface area of PCAC were 0.45 mg·g⁻ 1 ·m⁻ 2 for methanol and 0.35 mg·g⁻ 1 ·m⁻ 2 for toluene. This study provided a novel theoretical and experimental framework for the molecular design of polarized elements to enhance the adsorption of polar gases, offering significant advancements over existing commercial solutions.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
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IF 5.162
Xuemeng Jia,Ning Yang,Xuchao Qi,Li Chen,Yiping Zhao
A novel bio-based zein- graft -β-cyclodextrin film was synthesized for cholesterol adsorption at room temperature. Immobilization of β-cyclodextrin (β-CD) to zein was achieved by the Maillard reaction and the zein- graft -β-CD powders showed higher glass transition temperature and higher solubility in water. Zein- graft -β-CD films, prepared by solvent evaporation casting, showed excellent capacity for cholesterol adsorption. The F 1:1 has the best adsorption properties, and the maximum adsorption capacity can reach 5.70 ± 0.56 mg cholesterol/g film. The adsorption cholesterol mechanism of zein- graft -β-CD film was correspond to the pseudo-first order kinetic model. In addition, the zein- graft -β-CD film retained an adsorption capacity of 3.10 ± 0.89 mg cholesterol/g film after three reuses. Using composite enzyme (1 mg/mL papain and 1 mg/mL amylase), the film (F 1:1 ) degradation reached 98.81% in 1 week. These results suggest that zein- graft -β-CD film has potential as a nature-based adsorbent for cholesterol adsorption and could be used in the food industry.
研究领域:
食品科学
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生物材料学
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PubMed
高影响因子
FOOD CHEMISTRY
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2020
·
IF 6.306
Weijie Wu,Jie Hu,Haiyan Gao,Hangjun Chen,Xiangjun Fang,Honglei Mu,Yanchao Han,Ruiling Liu
The physicochemical and physiological properties of soluble dietary fiber (SDF) and insoluble dietary fiber (IDF) from bamboo shoots were investigated in present study. IDF showed better adsorption capacity than the corresponding SDF from the same species. Microstructure observation results indicated that the surface of IDF was porous, whereas the SDF was relatively flat and compact. The cholesterol-adsorption capacities of IDF and SDF from Fargesia spathacea were relatively higher than the other species. Both SDF and IDF from F. spathacea showed potential prebiotic effects, although the Lactobacillus and Bifidobacterium promotion effects of SDF were relatively stronger than IDF. Compared with control, the concentration of total short chain fatty acids in IDF and SDF supplement groups were increased by 1.28 and 0.71 folds, respectively. These results suggested that F. spathacea dietary fibers with strong cholesterol-adsorption activity and prebiotic potential, could be used as a bioactive ingredient in functional foods production.
研究领域:
食品科学
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营养学
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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2024
·Vol. 26
·期 19
·14336-14344
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IF 2.9
Caihe Liu,Xujin Qin,Changhui Yu,Yuan Guo,Zhen Zhang
Investigating the effects of electrolyte ions on the adsorption configuration of methanol at a charged interface is important for studying the interface structure of electrolyte solutions and the oxidation mechanism of methanol in fuel cells. This study uses sum frequency generation (SFG) and heterodyne-detected second harmonic generation (HD-SHG) to investigate the adsorption configuration of methanol at the air/aqueous interface of 0.1 M NaClO4 solution, 0.1 M HClO4 solution and pure water. The results elucidate that the ion effect in the electrolyte solution affects the interface's charged state and the methanol's adsorption conformation at the interface. The negatively charged surface of the 0.1 M NaClO4 solution and the positively charged surface of the 0.1 M HClO4 solution arise from the corresponding specific ionic effects of the electrolyte solution. The orientation angle of methyl with respect to the surface normal is 43.4° ± 0.1° at the 0.1 M NaClO4 solution surface and 21.5° ± 0.2° at the 0.1 M HClO4 solution surface. Examining these adsorption configurations in detail, we find that at the negatively charged surface the inclined orientation angle (43.4°) of methanol favors the hydroxymethyl production by breaking the C–H bond, while at the positively charged surface the upright orientation angle (21.5°) of methanol promotes the methoxy formation by breaking the O–H bond. These findings not only illuminate the intricate ion effects on small organic molecules but also contribute to a molecular-level comprehension of the oxidation mechanism of methanol at electrode interfaces.
研究领域:
物理化学
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界面科学
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能源材料
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高影响因子
RSC Advances
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2020
·Vol. 10
·期 62
·38085-38096
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IF 3.119
Kexin Zheng,Long Jiang,Shitao Yu,Mo Xian,Zhanqian Song,Shiwei Liu,Chao Xu
In this study, a series of polystyrene-divinylbenzene resins with precise physical structure regulation and chemical modification were successfully synthesized. The regulation of Friedel–Crafts reaction conditions resulted in several physical resins with various BET surface areas and pore structures, while the adsorption of 1,3-propanediol revealed that the molecular size and other physical properties exhibited a moderate contribution to the adsorption of hydrophilic compounds. The adsorption processes between 1,3-propanediol and nitrogen, oxygen and boron functional group modified resins were further explored, and boronic acid modified resins named PS-3NB and PS-SBT exhibited higher adsorption capacities than commercial resin CHA-111. The adsorption capacity of PS-3NB and PS-SBT reached 17.54 mg g−1 and 17.23 mg g−1, respectively, which were 37% and 35% higher than that of commercial resin CHA-111. Furthermore, the adsorption mechanism demonstrated that the content of boronic acid, solution pH and adsorbate hydrophobicity were the primary adsorption driving forces. Herein, we provided a method to modify polystyrene-divinylbenzene materials with boronic acid to selectively adsorb hydrophilic polyols via the specific affinity between boronic acid and diol molecule.
研究领域:
材料科学
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化学工程
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yichang Yang,Xiangyu Meng,Longfeng Zhu,Jinghuai Yang,Guoliang Zhang,Hongxia Shen,Xuebo Cao
Rapid synthesis of Si-rich (SiO2/Al2O3 > 100) SSZ-13 zeolite under fluoride-free conditions is highly desirable but still challenging. Herein, we for the first time report a rapid synthesis of all silica and aluminosilicate (SiO2/Al2O3 > 100) SSZ-13 zeolite without the addition of fluoride species. The crystallization could be fully completed at 160 °C for 4 h when the aging of the starting gel is 3 h at room temperature after the addition of a zeolite seed. The key to success is the formation of more basic building units (4- and 6-membered rings) in the initial gel with the aging time of 3 h after the addition of a zeolite seed, leading to the successful rapid synthesis of Si-rich SSZ-13 zeolite. The obtained Si-rich SSZ-13 zeolite displays high crystallinity, uniform cubic morphology with a nanoparticle feature, and a large surface area. More importantly, the obtained Si-rich SSZ-13 zeolite displays excellent performance in the adsorption of ethanol and methanol-to-olefin reaction.
研究领域:
材料科学
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化学工程
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催化
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PubMed
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Zhiwei Zhang,Xinyi Yang,Zhenhong Gao,Meiyue Zhang,Shuaixue Mu,Yuying Cheng,Kunsheng Qu
Cucumbers produce by-products such as cucumber pomace during processing and most of them are discarded without being utilized. To effectively utilize the waste, cucumber pomace is used to extract both insoluble and soluble dietary fibers (DFs) using compound enzyme method (ME), High pressure processing assisted ME (HPP-ME), and dynamic high-pressure microfluidization-assisted ME (DHPM-ME). The results showed that DHPM-ME improved the extraction rate of soluble DFs most effectively, increasing it from 1.74 % to 4.08 %. The modified DFs exhibited enhanced hydration properties and functional properties after HPP-ME- and DHPM-ME-mediated auxiliary treatment. Additionally, the modified DFs exhibited improved thermal stability, increased absorption peaks in the infrared spectra, decreased crystallinity, improved glucose and cholesterol adsorption ability, and delayed glucose adsorption. The cucumber pomace-derived modified DFs can be used as a functional food additive in bakery, meat, dairy products, and beverages, and their effective use can further enhance the economic benefits.
研究领域:
食品科学
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生物技术
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农业工程
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PubMed
高影响因子
FOOD CHEMISTRY
·
2023
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IF 8.8
Wenjie Ma,Yuting Liang,Huasi Lin,Yi Chen,Jianhua Xie,Fengling Ai,Ziwen Yan,Xiaobo Hu,Qiang Yu
In the study, a highly efficient cellulose-degrading strain was screened, which was identified as a fungus in the genus Penicillium sp., named YZ-1. The content of soluble dietary fiber was greatly increased by the treatment of this strain. In addition, the effects of soluble dietary fiber from high-pressure cooking group (HG-SDF), strain fermentation group (FG-SDF) and control group (CK-SDF) on the physicochemical structure, and in vitro hypolipidemic activity were investigated. The results showed that the physicochemical structure of the raw materials was improved after fermentation, and FG-SDF exhibited the loosest structure, the highest viscosity and thermal stability. Furthermore, compared to CK-SDF and HG-SDF, FG-SDF showed the most significant improvement in functional properties, including cholesterol adsorption capacity (CAC), inhibition of pancreatic lipase activity (LI) and mixed bile acid adsorption capacity (BBC). Overall, these findings will provide new insights into dietary fiber modification and improve the comprehensive use value of grapefruit by-products.
研究领域:
食品科学
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生物技术
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营养学
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微生物学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）