Food Bioscience
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2024
·
IF 4.8
Xinyue Qin,Tao Xiong,Xinyi Kang,Zhanggen Liu,Mingyong Xie,Qianqian Guan
Suansun (fermented bamboo shoots) was prepared by natural fermentation (NF) and inoculation fermentation (IF) with a starter culture containing Lactococcus lactis , Leuconostoc citreum , and Lactiplantibacillus plantarum in this study, to evaluate the effects of inoculation mixed starter culture on physicochemical, flavor and sensory characteristics of suansun. The results showed that IF suansun acidified faster and to a greater extent than NF. Besides, the accelerated acidification process significantly decreased the nitrite content, shortened the fermentation time and improved the food safety of the final suansun product in IF. At the end of fermentation, the lactic acid concentration was significantly higher in IF (6.17 ± 0.25 g/L) than in NF (3.83 ± 0.28 g/L). Twenty-seven volatile compounds were identified as the characteristic flavor compounds in suansun and the relative content of nonanal, hexanal, 1-octen-3-ol and 3-octanone (ROAV >1) was higher in IF than in NF at the late stage of fermentation. In addition, 132 non-volatile compounds were identified as significant differential metabolites, which were mainly small peptides and fatty acids in both NF and IF. Sensory evaluation found that the aroma, taste, texture and overall quality scores of IF suansun were all superior to those of NF suansun. The above results demonstrated that the use of mixed starter cultures of Lac. lactis , Leu. citreum , and L. plantarum contributed to improving the quality of suansun product, and might provide a feasible approach for standardized production of suansun in the future.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Zhiyan Sui,Zhe Wang,Yan Wang
Using carboxylated graphene oxide (CFGO) as inorganic crosslinking agent, a series of poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) based complex anion exchange membranes (AEMs) with pyridine cations as conduction sites were prepared successfully. The carboxyl modification can improve the dispersibility of inorganic filler in the polymer and provide more crosslinking sites. At the same time, the two-dimensional layered structure of CFGO and a large number of hydrophilic groups provide good ion transport channels. As a result, compared with the original membrane, the crosslinked composite membranes showed better conductivity and chemical stability. Among them, the conductivity of AP-PPO-CFGO2 reached 102.41 mS/cm at 80 °C, and retained about 70% of the conductivity after soaking in 2 M NaOH for 800 h. Furthermore, the AP-PPO-CFGO2 displayed a power density of 277.5 mW/cm 2 in a H 2 /O 2 single cell test at 80 °C.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ke Wang,Wei Gao
Efficient thermal insulation and flame-retardant materials are crucial in reducing energy consumption and minimizing fire hazards. This work presents a novel method for preparing a composite aerogel: a silane coupling agent was used as a chemical bridge to synthesize a new flame retardant AKH (modified APP with HNTs). AKH was incorporated into the silica sol to fabricate the SA-AKH composite aerogel. SA-AKH features a dense three-dimensional network skeletal structure, excellent thermal stability, and a high specific surface area. When integrated into organosilicon resin, SA-AKH significantly enhances the flame resistance of composite materials. During cone calorimetry testing (CCT), SSAKH4 exhibited a peak heat release rate (PHRR) of 281.88 kW/m 2 and total smoke production (TSP) of 5.52 m 2 , representing a decrease of 30.8 % and 4.5 %, respectively, compared to SSA4. The composite material, derived from the unique mesoporous structure of aerogel combined with the flame retardant and hollow characterization of AKH, demonstrates exceptional flame retardancy and smoke suppression. SA-AKH is expected to make novel advancements in the field of high-efficiency insulation and flame-resistant composites.
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Journal of Energy Storage
·
2025
·
IF 9.8
Xiaohong Chen,Xuezhen Zhai,Yongqi Wu,Xuzhe Wang,Lamei Zhang,Cui Shang,Huawei Zhang,Chengzhou Zhao,Jimin Shang,Dewei Liu
Vanadium-based oxides have gained significant attention as promising cathode materials for aqueous zinc-ion batteries, owing to their high theoretical capacities, the ability to undergo multi-electron transfer, and varied crystal structures. Despite these advantages, challenges related to structural instability and poor electrical conductivity remain significant barriers to their practical application. In this study, Cr-doped VO 2 (B) nanorods were prepared using a hydrothermal treatment process as a promising candidate for aqueous zinc-ion battery cathodes. The multivalent nature of vanadium promotes a variety of redox reactions, resulting in high specific capacities. Chromium ion doping increases oxygen vacancy defects and provides efficient channels for electron transfer. The nanorod morphology offers an increased specific surface area, thereby promoting a higher density of active sites. Positron annihilation lifetime spectroscopy indicates that the generated defects exist in the form of single vacancies. Thanks to the unique tunnel structure and micro-morphology advantages, the CrVO cathode exhibits rapid electron transfer and superior reaction kinetics. Electrochemical performance is optimized at a chromium ion doping concentration of 6 at.%, achieving a high specific capacity of 312.8 mAh g −1 at 0.1 A g −1 and retaining 188.3 mAh g −1 at 5 A g −1 after 2000 cycles, with a remarkable capacity retention of 90.39 %, indicating exceptional long-term cycling stability. This work optimizes the electrochemical performance by introducing different concentrations of chromium ions into the monoclinic VO 2 , thereby altering the Cr 3+ /Cr 6+ and V 4+ /V 5+ ratio, providing a feasible approach for developing high-performance vanadium-based aqueous zinc-ion battery cathodes.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Haoru Shan,Xueqin Wang,Feihao Shi,Jianhua Yan,Jianyong Yu,Bin Ding
The separation and purification of chemical molecules from organic media under harsh chemical environments are of vital importance in the fields of water treatment, biomedical engineering, and organic recycling. Herein, we report the preparation of a flexible SiO2/SnO2 nanofibrous membrane (SiO2/SnO2 NFM) with high surface area and hierarchical porous structure by selecting poly(vinyl butyral) as pore-forming agent and embedding crystalline phase into amorphous matrix without using surfactant as sacrificial template. Benefiting from the uniform micropore size on the fibers and negatively charged properties, the membranes exhibit a precise selectivity toward molecules based on electrostatic interaction and size exclusion, which could separate organic molecule mixtures with the same electrostatic charges and different molecular sizes with a high efficiency of more than 97%. Furthermore, the highly tortuous open-porous structures and high porosity give rise to a high permeate flux of 288 000 L m–2 h–1. In addition, the membrane also displays excellent stability and can be reused for ten consecutive filtration–regeneration cycles. The integration of high filtration efficiency, large permeate flux, good reutilization, and easy to industrialization provides the SiO2/SnO2 NFM for potential applications in practical molecular purification and separation science.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Rui Feng,Zhou Fang,Runxi Zhang,Xiaoyan Hu,Tianbo Li,Wei Zhou,Feifei Yang,Xinlong Yan,Shijian Lu
Direct hydroxylation of benzene to phenol is a more environmentally friendly way to generate phenol compared with the traditional method. This study developed vanadium-modified hollow-structured titanium silicate-1 (TS-1) as a catalyst for the effective hydroxylation of benzene to phenol under moderate conditions using hydrogen peroxide as an oxidant. The synthesis of TS-1 zeolites has been improved using traditional hydrothermal, crystal seed, and dissolution–recrystallization techniques. Compared with conventional TS-1, hollow-structured TS-1 exhibited a higher mesopore volume and surface area. Later, vanadium doping increased the charge density associated with the framework Ti centers and acid site content. In the radical reaction process, the adsorption and activation of benzene on highly reactive Ti–OOH intermediates, as well as the improvement of performances toward benzene hydroxylation to phenol, were facilitated by the increase in the concentration of open active centers and acid and electron characteristics.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
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IF 8.4
Yuhan Long,Haoying Zhang,Hanzhao Yang,Mengze Han,Changyan Wang,Xuesong Zhan,Dongfang Liu,Wenli Huang
Coal gasification slag (CGS) is a challenging solid waste due to the presence of highly toxic heavy metals, which pose significant risks to environmental and human health. CGS cannot be freely reused or disposed of, creating considerable obstacles to solid waste resource utilization. This study presents a novel method for heavy metal removal from CGS through a separation-oxidation-acid washing (SOA) process, which effectively recycles residual carbon (RC) while minimizing the risk of heavy metal leakage. The chemical morphology, leaching patterns, and environmental risks of heavy metals in CGS following the SOA process were investigated, demonstrating effective separation and removal. The ignition loss (LOI) in CGS exceeded 45% after treatment, significantly surpassing the original value. Removal rates for Sb, Pb, and As from coal gasification fine slag (CGFS) were 88.6%, 75.88%, and 79.35%, respectively, while rates for Sb, As, and Ni from coal gasification coarse slag (CGCS) were 56.65%, 63.24%, and 50.8%. The risk assessment codes (RAC) for Cu, Co, and Sb in CGFS were reduced to low-risk levels of 3.18%, 10.30%, and 25.21%, respectively, and the relative leaching ratios (RLR) for Co (0.162%), Cu (0.006%), and Ni (0.180%) in CGCS exhibited notable reductions, suggesting that the applied process significantly mitigates the environmental risk and leaching potential of these heavy metals. Overall, this study contributes to the clean production of coal gasification enterprises by offering an environmentally friendly strategy for heavy metal removal and enhancing resource utilization through RC recovery.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-10
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IF 5.3
Ke Wenrui,Kuang Guochen,Gu Chuangqi,Wang Junhao,Jiang Xiao,Zhu Rongjiao,Wang Haiyuan,Zhang Zhen
A Cr-doped VO 2 nanobelt (Cr/VO 2 ) with remarkable peroxidase-like activity was synthesized and coupled with uricase to catalyze the cascade reaction for detection of uric acid. Notably, the affinity of Cr/VO 2 for 3,3',5,5'-tetramethylbenzidine dihydrochloride hydrate (TMB) and hydrogen peroxide (H 2 O 2 ) is tenfold and 20-fold higher, respectively, than that of horseradish peroxidase (HRP). The Cr/VO 2 exhibits highly reactive and stable peroxidase activity at temperatures of 20-60 ℃. Thus, the reaction catalyzed by Cr/VO 2 can be carried out at room temperature, greatly simplifying the testing process. This enzyme cascade nanozyme based colorimetric assay enables the selective and simple detection of uric acid within 30 min with a detection limit of only 0.34 μM, and has an observable potential in clinical applications. Graphical abstract
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Jiantao Zhang,Ran Tao,Yangdong Wang,Jianchun Jiang,Yicun Chen
The essential oil of Litsea cubeba demonstrates notable antibacterial properties and holds considerable promise for various applications. To explore green and effective extraction method for L. cubeba essential oil, we introduced enzyme-assisted natural deep eutectic solvents (DESs). The optimization of DESs was performed using response surface methodology with a Box-Behnken design (BBD), and the optimal parameters were determined as follows: a choline chloride to citric acid (ChCl/CA) ratio of 1:0.97, water content of 73%, and cellulase(0.5%) enzymolysis temperature of 45°C. Compared to traditional steam distillation, the DESs method significantly increased the essential oil yield from 3.20% to 4.70% and expanded the chemical profile of the essential oil, identifying a total of 79 compounds. Five new aromatic compounds, including methyl geranate, geranic acid, p-mentha-1,5-dien-8-ol, α-terpinyl acetate, and terpinyl acetate, were identified. Antifungal activity against Aspergillus flavus was confirmed by scanning electron microscopy. At a concentration of 1,000 μL/L, after 96 hours of incubation, essential oils extracted using enzyme-assisted DESs method demonstrated substantial inhibition against A. flavus , with the ChCl/EG formulation achieving a 100% inhibition rate. The content of citral, citronellal, citronellol, linalool, and new compound methyl geranate showed a positive correlation with the anti- A. flavus inhibition rate. The enzyme-assisted DESs extraction method proves to be an effective and efficient approach for extracting L. cubeba essential oil and provides a valuable reference for future research and application in essential oil extraction.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Qian-Qian Tang,Bang-Xiang Wu,Xiao-Wen Huang,Yi Hu,Dongmei Hou,Wei Ren,Ling-Ling Liu,Ying Chen,Lei Tian,Long-Shuai Zhang,Qing Sun,Jian-Ping Zou
Highly selective generation of singlet oxygen ( 1 O 2 ) in the electro-Fenton system remains challenging due to susceptibility of the O-O bond to break in O 2 reduction reaction and activation process of H 2 O 2 . Herein, the nitrogen-coordinated Fe single-atom catalyst with a high coordination number (FeN 6 /CN) was synthesized, allowing the Fe sites to remain trivalent while presenting a high spin state. The quenching experiments and EPR tests proved that the electro-Fenton system of FeN 6 /CN achieved high selectivity generation of 1 O 2 , showing excellent degradation performance of different organic pollutants. Combined with theoretical calculations, the FeN 6 sites displayed a lower energy barrier for the transfer from *H 2 O 2 to 1 O 2 . In the FeN 6 /CN’s electro-Fenton system, the high spin state of FeN 6 site ensured generation of H 2 O 2 via 2e - reduction. Simultaneously, the high oxidation state of FeN 6 site further achieved a highly selective generation of 1 O 2 by in situ activation of H 2 O 2 in the electro-Fenton system. Particularly, the FeN 6 /CN’s electro-Fenton system showed a high energy-efficient for pollutant removal (23.79 kWh·kg toc −1 ) compared to other electro-Fenton systems (50–300 kWh·kg toc −1 ). The electronic structure regulation of single atom sites provides a new avenue for highly selective generation of 1 O 2 in the electro-Fenton system.
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JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Huibing Dai,Maoqian Hu,Ning Zhu,Lijun Song,Hailong Hong
Deep eutectic solvents (DES) are regarded as eco-friendly alternatives for extracting bioactive substances from natural products. In this study, the DES with varying compositions were employed to extract flavonoids from Artemisia argyi H.Lév. & Vaniot ( A. argyi ) with the assistance of ultrasound, and optimized the extraction conditions through a Box-Behnken design (BBD). The results indicated that the choline chloride (ChCl) / lactic acid (LAC) (molar ratio 1:2) was the best DES for extracting flavonoids from A. argyi with an extraction power of 150 W. The optimal process condition was identified as DES with a water content of 40.0 %, a material-liquid ratio of 1:22.4 g·mL −1 , and the extraction temperature of 44.8 °C. This method demonstrated superior performance compared to the traditional ethanol method. The biological activities in vitro revealed that the extracts exhibited desirable antioxidant activity, and the extraction mechanism of flavonoids was investigated by density functional theory. Furthermore, five distinct types of macroporous resins (HPD826, AB8, YKDH-3, D101, and NKA-9) were selected for the recovery of DES. YKDH-3 exhibited the strongest adsorption capacity, and HPD826 the weakest. The extraction rate of recycled DES reached 84.5 %, the number of recycling was up to more than 6 times. In short, this method, combined with macroporous resin enrichment, can be used as an alternative method for green and efficient extraction of bioactive flavonoids from plants.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiangsen Xu,Jiangxiao Qiao,Shibo Yu,Jiahao Chen,Yiqing Zeng,Feng Zhang,Zhaoxiang Zhong,Weihong Xing
The rational design of catalysts and the establishment of uniform filter structure are key points in the development of high-performance catalytic filters. To resolve the issue of increased N 2 O concentration in catalysts with high vanadium content at high temperatures, a range of catalytic filters with low vanadium loading were fabricated by partially substituting vanadium in 6VWTi catalysts with transition metals (Mn, Cu, Co and Ce). The experimental results show that the introduction of Ce, which leads to rich surface-adsorbed reactive oxygen species, good redox properties and appropriate surface acidity, thus the 1V5CeWTi/SiC catalytic filter exhibits the highest denitration efficiency (NO conversion ＞90 % at the temperature of 300–500 °C without N 2 O production), presenting significant advantages in contrast to 1VWTi/SiC and 6VWTi/SiC. Furthermore, the preparation technology was optimized to obtain a more uniform structure, which enhanced NH 3 -SCR performance and reduced filter pressure drop. The optimized 1V5CeWTi/SiC also exhibited exceptional resistance to SO 2 + H 2 O and long-term stability for a duration of 200 h at 300 °C, as well as displays a noteworthy efficiency in filtering particulate matter (10 μm SiO 2 ). Therefore, the optimized 1V5CeWTi/SiC catalytic filter holds great potential in the realm of gas purification.
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