JOURNAL OF THE ENERGY INSTITUTE
·
2019
·
IF 3.774
Xiaohua Li,Wenbin Dong,Jin Zhang,Shanshan Shao,Yixi Cai
The Fe-, Co-, Cu-loaded HZSM-5 zeolites were prepared via impregnation method. The upgrading by catalyst on biomass pyrolysis vapors was conducted over modified zeolites to investigate their catalytic upgrading performance and anti-coking performance. The Brønsted acid sites amount on Cu-,Co-loaded HZSM-5 decreased sharply, while that of Lewis both increased. The yield of liquid fraction and refined bio-oil over metal loaded ZSM-5 catalysts decreased, while that of char almost kept constant. The physical property of refined bio-oil was promoted in terms of pH value, dynamic viscosity and higher heating value (HHV). FT-IR analysis revealed that the chemical structure of refined bio-oil obtained over Fe-, Co-, Cu-loaded HZSM-5 zeolites was highly similar. The yield of monocyclic aromatic and aliphatic hydrocarbon over Fe-,Co-loaded HZSM-5 were boosted by around 2.5 times compared with original ZSM-5 zeolites. Data analysis revealed that Cu/HZSM-5 presented the worst deoxygenation ability. The anti-coking capability of Fe/HZSM-5 was obviously better, i.e., the coke content showed an approximate decrease of 38%. Thus, this study provided an efficient Fe/HZSM-5 catalysts for preparation of bio-oil derived from catalytic upgrading of biomass pyrolysis vapor.
研究领域:
能源与燃料
·
催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Zhang,Bingfeng Chen,Ti Zhou,Xiaomeng Cheng,Minghua Dong,Ye Liu,Huizhen Liu,Qingling Xu,Buxing Han
The conversion of carbohydrates into 5-hydroxymethylfurfural (HMF), a vital and valuable platform chemical, is sought after in industrial applications but poses significant challenges. In this research, we engineered an ultra-thin layer HTaMoO 6 catalyst using ball-milling/liquid-exfoliation technique, demonstrating its efficiency in catalyzing the transformation of carbohydrates to HMF. In contrast to the conventional method utilizing tetra(n-butylammonium) hydroxide as the intercalation agent, the ball-milling/liquid-exfoliation technique not only reduces catalyst preparation time (within 12 h) but also enhances the efficient intercalation, leading to the formation of an ultra-thin layer structure. The resulting catalyst exhibits high total acidity, a favorable Brønsted/Lewis acid ratio, and improved accessibility of active sites due to the thin layer structure post-exfoliation. Compared with bulk LiTaMoO 6 , the ultrathin layer HTaMoO 6 catalyst enables complete fructose dehydration with an HMF yield reaching 89.1 % under moderate reaction conditions (120 °C, 1 h) and 47.2 % yield of HMF is obtained from sucrose at 130 °C. This work provides a new method to fabricate the solid acid for the transformation of carbohydrates.
研究领域:
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Innovative Food Science & Emerging Technologies
·
2025
·
IF 6.8
Lijun Tan,Shasha Zheng,Yong Xie,Wendi Zhang,Baocai Xu
Photodynamic inactivation (PDI) is a promising non-thermal antimicrobial technology known for broad-spectrum efficacy and low resistance potential. However, conventional PDI face limitations in bactericidal efficacy due to the short-lived and poorly diffusing reactive oxygen species (ROS). This study proposes a novel food-grade PDI strategy that incorporates disodium 5′-inosinate (IMP) into a vitamin B2 (VB2)-mediated system, significantly enhancing H 2 O 2 production. Acting as an electron donor, IMP promotes type I photochemical reactions, enabling sustained H 2 O 2 generation and achieving >6 log CFU/mL inactivation of Bacillus safensis , a spoilage bacterium often overlooked in cooked meat products. Mechanistic analyses showed that H 2 O 2 oxidized key phospholipids in the cell membrane, increased permeability, caused membrane potential hyperpolarization and ion leakage, and ultimately disrupted multiple membrane domains. Moreover, this strategy also exhibited persistent antimicrobial activity, effectively delaying spoilage in cooked meat products stored at 4 °C and 25 °C. Overall, this study introduces a safe and effective non-thermal sterilization method with promising industrial potential and offers a novel pathway to enhance PDI efficacy via intensified type I ROS mechanisms.
研究领域:
食品科学
·
光动力学
·
微生物学
·
生物化学
·
食品保鲜技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Shiling Zhao,Kaizhi Wang,Shaoqi Mao,Beibei Yang,Yu Zhao
In the pursuit of high-selective oxidation of 5-hydroxymethylfurfural (HMF) to valuable derivatives such as 5-hydroxymethylfuroic acid (HMFCA), 5-formyl-2-furanoic acid (FFCA), and furan-2,5-dicarboxylic acid (FDCA), we have developed a diethylenetriamine pentaacetic acid (DTPA)-assisted strategy to construct a highly effective photothermal catalyst with maximized Ag–CeO2 interfaces and rich oxygen vacancies. Under optimal reaction conditions, this catalyst achieves remarkable yields of 99% for HMFCA, 99% for FFCA with a turnover frequency (TOF) of 163 h–1, and 98% for FDCA. Combined theoretical calculations and a series of characterization analyses reveal that the superior performance is due to the unique properties of the maximized Ag–CeO2 interfaces and the rich oxygen vacancies, which enhance electron transport and synergistically enhance the catalytic activity of silver clusters. In contrast to other photocatalytic oxidation systems for HMF, this work showcases high selectivity in the oxidation of HMF to HMFCA, FFCA, and FDCA. These findings not only elucidate the mechanisms behind selective oxidation but also offer a promising approach for the directional photosynthesis of high-purity chemicals in related applications.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-9
·
IF 4.259
Wang Chao,Zhang Liming,Zhou Tian,Chen Jiachuan,Xu Feng
5-hydroxymethylfurfural (HMF) is an important platform molecule in the synthesis of various chemicals and materials. Herein, we reported a simple and effective dehydration of glucose-based carbohydrates to HMF in a biphasic system containing cyclopentyl methyl ether as the organic phase and AlCl 3 with minute amounts of HCl as co-catalysts. The results showed that the mixed catalysts had a positive synergistic catalytic effect on glucose conversion to HMF compared with single AlCl 3 or HCl catalyst. For glucose, the highest HMF yield of 54.5% was achieved at 175 °C for 20 min. More importantly, the optimal catalytic system was so efficient that it achieved one of the highest reported yields of HMF (30.5%) directly from corncob acid hydrolysis residues. Thus, the catalytic system can become a promising route for effective utilization of biomass in future biorefineries.
研究领域:
生物化学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2018
·Vol. 124
·期 2
·587-601
·
IF 1.515
Wang Tao,Zhang Xinyu,Liu Jun,Liu Hanzi,Sun Baomin
NO conversion using dielectric barrier discharge (DBD) plasma with different catalysts was investigated. Cu/TiO 2 , Cu/Al 2 O 3 , Cu/ZSM-5, Cu/CNTs and Cu/AC catalysts were prepared by incipient wetness impregnation with 4 wt% Cu loaded. BET, SEM, XRD, XPS, H 2 -TPR, NH 3 -TPD were used to measure and evaluate various catalysts. Compared with the plasma only process, the combination of plasma with different catalysts significant improved the NO conversion rate. The highest NO conversion rate of 76% could be achieved with Cu/ZSM-5 catalyst at the energy density of 184 J/L. The results indicate that Cu species over the support ZSM-5 can produce high concentrations of CuO, largest specific surface area, largest amounts of acidity and lowest reduction temperature (209 °C), these factors conducive to plasma-catalyst reaction. Besides, Cu/TiO 2 and Cu/Al 2 O 3 catalysts exhibited excellent NO conversion at the low energy density because of the low thermal stability. After plasma-catalyst reaction, the reducibility of CuO and Cu 2 O over supports decreased and the peak position of acid sites shifted to lower temperature.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Junpu An,Hongchen Liu,Fan Yang,Kexin Wei,Chunhui Yu,Siyuan Sun,Yang Sun,Qing Guo,Jianfeng Wang,Chenlin Wang,Jiahui Liu,Kuobo Wang,Yongfeng Li
Nickel-based catalysts show great potential as promising candidates for the electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF). However, the limited adsorption capacity of nickel-based catalysts for OH – and HMF limits their further development. In this study, amorphous Fe/NiOOH-SO x was generated from nanosheets (Fe/NiOOH-Ni 3 S 2 ), which was pre-fabricated on nickel foam via pre-reconstruction and anionic regulation strategy. The optimized catalyst Fe/NiOOH-Ni 3 S 2 demonstrated exceptional activity in the HMF oxidation reaction (HMFOR) with a current density of 10 mA cm −2 at 1.32 V vs RHE, accompanying with the 98.9 % HMF conversion, 97.8 % 2,5-Furandicarboxylic acid (FDCA) selectivity, 96.8 % Faraday efficiency, and stability for ten cycles. The incorporating amorphous FeOOH reduces the electron density around Ni, promoting the formation of high-valent Ni spices. Meanwhile, the SO x combined with amorphous hydroxy nickel oxide provides unsaturated sites, which enhances the adsorption capacity of HMF. Density functional theory (DFT) computations reveal that the designed amorphous Fe/NiOOH and surface-adsorbed SO x collectively modulate the electronic structure of the catalyst, causing an upwards shift of the NiOOH d-band center and enhancing adsorption capacities for both HMF and OH – . This study proposes the adsorption enhancement mechanism of regulating electronic structure and offers a rational strategy for HMFOR electrocatalysts.
研究领域:
催化化学
·
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applications in Energy and Combustion Science
·
2021
·
IF 0
Huiyan Zhang,Bingbing Luo,Kai Wu,Han Wu,Jiajun Yu,Siyu Wang
Catalytic fast pyrolysis of lignin is easy to cause agglomeration and coking, resulting in low-yield aromatic hydrocarbons. Catalytic pyrolysis of modified lignin combined with metal-modified HZSM-5 was proposed to enhance the aromatic yield. The experiment results showed that chemical modification with Ca(OH) 2 not only inhibited the agglomeration behavior of lignin but also increased the yield of light phenolic compounds. Moreover, Ca 2+ -loaded lignin combined with metal-modified HZSM-5 was conducive to the formation of aromatics. The total yield of aromatics from the catalytic fast pyrolysis of Ca 2+ -loaded lignin over Zn/HZSM-5 was improved from 31.1 to 46.1 mg/g. The mechanism insight showed that Ca 2+ modification realized the chemical combination between Ca 2+ and the functional groups which are responsible for the agglomeration of lignin, and then the introduction of the Zn species suppressed the hydrogen transfer reaction and enhanced the dehydrogenation pathway, resulting in the increase of aromatic yield.
研究领域:
化学工程
·
能源科学
·
材料科学
✓ 已验证
DOI
RSC Advances
·
2015
·Vol. 5
·期 43
·33809-33813
·
IF 3.84
Bo Xiao,Ying Fan,Rui-han Gao,Peng Chen,Jian-xin Zhang,Qing-di Zhou,Sai-Feng Xue,Qian-Jiang Zhu,Zhu Tao
A one-pot strategy was employed to synthesize a series of cucurbit[5]uril-anchored (Q[5]-anchored) polymers with high yields. The acrylic acid (AA) monomer, an ammonium persulfate salt (APS) initiator, and an oxidant were used in the polymerization. The Q[5]-anchored polyacrylic acid aggregates (Q[5]-PAA) have been characterized by 1H NMR, 13C NMR, 2D NMR, FTIR, TGA, GPC, TEM and SEM measurements. The experimental results confirm that PAA chains can be grafted to Q[5] in a controlled manner through an in situ radical polymerization approach. The effects of acrylic acid and Q[5] feed mass and APS concentration on the formation of polymer nanocapsules have been investigated. The experiments reveal that the feed mass of acrylic acid greatly influences the properties of Q[5]-PAA when the ratio of Q[5]/APS is fixed at 0.5. In particular, when APS/Q[5] = 46 and 72, vesicle structures are observed in the Q[5]-anchored polymers. Moreover, such polymer nanocapsules show selective absorption of some volatile compounds, particularly methanol.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-20
·
IF 15.7
Dong Huijun,Pan Zihang,Jiao Pengtao,Ye Fei,Peng Qi,Yu Yanying,Lai Xinyuan,Li Huan,Guan Zhao,Deng Juan,Shen Tao,Tan Wenjie,Shi Yi,Ding Qiang,Luo Jianyuan,Li Tong,Zhuang Hui,Xiang Kuanhui
Embryonic stem cells (ESCs) display a distinctive resistance against various viruses, irrespective of any interferon response. Nevertheless, the underlying mechanism of this resistance remains unclear. In this study, we identify vesicle-associated membrane protein 5 (VAMP5) as a potent cell-autonomous defense factor against coronaviruses, including SARS-CoV-2, with high expression levels observed in ESCs and mesoderm. VAMP5 not only exhibits functional conservation in restricting the replication of SARS-CoV-2 and its variants, as well as other highly pathogenic coronaviruses, but also shows efficacy in combating the replication of viruses from other families. Mechanistic investigations reveal that VAMP5 localizes to double membrane vesicles (DMVs) and impedes viral replication by relying on its vesicle-side C-terminal domain to interact with the viral non-structural protein 8 (NSP8), thus inhibiting the synthesis of negative-strand RNA. Our research demonstrates that VAMP5 in ESCs disrupts the protected environment of DMVs, which is essential for viral genome replication, and interacts with RNA replication complexes to defend against viral infection. This provides a novel strategy for developing broad-spectrum antiviral treatments.
研究领域:
细胞生物学
·
病毒学
·
分子生物学
·
发育生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biosensors-Basel
·
2022
·Vol. 12
·期 7
·544
·
IF 5.743
Jingyi Li,Ning Zhang,Xin Yang,Xinting Yang,Zengli Wang,Huan Liu
This study presents a novel composite thin film based on rhodamine B encapsulated into MOF-5 (Metal Organic Frameworks) as a fluorescence sensor for the real-time detection of the freshness of chilled pork. The composite film can adsorb and respond to the volatile amines produced by the quality deterioration of pork during storage at 4 °C, with the fluorescence intensity of RhB decreasing over time. The quantitative model used for predicting the freshness indicator (total volatile base nitrogen) of pork was built using the fluorescence spectra (excited at 340 nm) of the RhB@MOF-5 composite film combined with the partial least squares (PLS) algorithm, providing Rc2and Rp2values of 0.908 and 0.821 and RMSEC(root mean square error of calibration) and RMSEP (root mean square error of prediction) values of 3.435 mg/100 g and 3.647 mg/100 g, respectively. The qualitative model established by the partial least squares discriminant analysis (PLS-DA) algorithm was able to accurately classify pork samples as fresh, acceptable or spoiled, and the accuracy was 86.67%.
研究领域:
食品科学
·
传感技术
·
生物化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Zheng Zhang,Ying Liu,Yunsheng Chen,Lexiang Li,Ping Lan,Dannong He,Jie Song,Yixin Zhang
5-Aminolevulinic acid (ALA)-loaded nanoethosome (ALA-ES) gels are successfully prepared to realize a transdermal delivery of ALA, and they provide a feasible approach for the photodynamic therapy (PDT) of hypertrophic scars (HS). Herein, the morphological and physicochemical features indicate that ALA-ES is stable in gel matrix. In vitro transdermal penetration studies suggest ALA-ES gels can overcome the compact dermal barrier and deliver more ALA into human HS tissue. In vivo delivery studies further reveal that ALA-ES gels can penetrate into rabbit HS tissue to facilitate ALA accumulating in hypertrophic scar fibroblast (HSF) and converting into protoporphyrin IX in the cytoplasm. Utilizing transmission electron microscopy, the visual in vivo penetration process indicates ALA-ES penetrate into HS tissue utilizing its deformable membrane, enters HSF by a pinocytotic-like mechanism, and then releases ALA in the cytoplasm. Subsequently, PDT efficacy is assessed using rabbit HS models. The morphological and histological analysis reveal that ALA-ES gels can improve HS by promoting HSF apoptosis, remodelling collagen fibers and increasing MMP3 expression. The results demonstrate that ALA-ES gels are suitable in clinical treatment of HS and make a substantial progress within the field.
研究领域:
药剂学
·
医学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）