JOURNAL OF FOOD ENGINEERING
·
2023
·
IF 5.5
Fang Xie,Yuan Fang,Xin Liu,Xin Cong,Yangchao Luo,Jiaojiao Zhou,Zia-ud Din,Shuiyuan Cheng,Jie Cai
Double emulsions (e.g., O/W/O and W/O/W emulsions) have important applications in healthy food development for food industry. Herein, we prepared O/W/O and W/O/W emulsions by two-step emulsification method only using two food grade emulsifiers (Octenyl succinate starch ester (OSA starch) and polyglycerol polyricinoleate (PGPR)), respectively. The optimal process parameters (in external emulsion and internal emulsion) for the preparation of O/W/O and W/O/W emulsions were systematically studied. It is noteworthy that the facile conversion of the two O/W/O and W/O/W emulsions could be achieved by changing the order of emulsifier addition. The double emulsions can be used for co-loading of plant-derived selenium-enriched peptide (Se-peptide) and vitamin E (V E ) with efficient loading rates, and the emulsions of encapsulated Se-peptide and V E have good antioxidant properties. The results of fuzzy numerical sensory evaluation and electronic nose showed that both emulsion systems were effective in masking the odor of Se-peptide.
研究领域:
食品科学
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生物技术
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产品关联
DOI
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Minghui Cui,Rongjing Guo,Yansong Zhou,Wenqi Zhao,Yanjing Liu,Wenbo Luo,Qiongrong Ou,Shuyu Zhang
The efficiency of hydrogen production from water electrolysis is mainly restricted by the sluggish oxygen evolution reaction (OER). The mainstream adsorbate evolution mechanism and lattice oxygen-mediated mechanism face a trade-off between performance and stability, while the diatomic oxygen mechanism (DOM) based on the O–O coupling provides a solution to overcome this limitation. However, the intrinsic principles that facilitate the O–O coupling remain unclear, which complicates material design. In this work, we use spinel Co3O4 as a model and identify that the asymmetric sites formed by the octahedral Co with O defects and the original octahedral Co are effective sites for O–O coupling. Based on this, we propose using the degree of asymmetry of the dual site as a descriptor to quantify the reaction free energy of rate-determining step along the DOM pathway, presenting a volcano plot relationship. Experimental validation shows that plasma-prepared Co3O4 enables O–O coupling, requiring only 287 and 420 mV overpotentials to achieve current densities of 10 and 1000 mA cm–2 in 0.5 M H2SO4, respectively. This work demonstrates efficient sites for the OER along the DOM pathway in Co3O4, providing valuable insights for designing high-performance OER catalysts.
研究领域:
材料科学
·
电催化
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
He Chun-Ting,Yu Li-Hong,Liu Haiming,Wang Qing,Ye Zi-Ming,Zhang Jia,Wang Li-Dong,He Mei-Qian,Zhang Xue-Feng,Du Hong-Gang,Lu Zi-Wei,Yang Jian,Huang Hai-Hua,Chen Xiao-Ming
Covalently bonded metal-free electrocatalysts exhibit significant potential for sustainable energy technologies, yet their performances remain unsatisfactory compared with metal-based catalysts. Herein, we propose an all-organic electrocatalyst, MEC-2, that conforms to the infrequent oxide path mechanism in alkaline oxygen evolution reaction through post-oxidation modification. MEC-2 achieves an intrinsic overpotential of 257.7 ± 0.6 mV at 10 mA·cm −2 and possesses durability with negligible degradation over 100,000 CV cycles or 250 h of operation at 1.0 A·cm −2 , being comparable to the advanced metal-based OER electrocatalysts. The 18 O-labeled operando characterization and theoretical calculations unveil that post-oxidation modification enhances the electron affinity to OH intermediates, and adjusts the adsorption configuration and proximity distance of O intermediates, thereby promoting direct O−O radical coupling. In this work, we show a fresh perspective for understanding the role of non-metallic elements/functional groups in electrocatalysis, and to a certain extent, narrows the gap between all-organic electrocatalysts and metal-based electrocatalysts.
研究领域:
能源材料科学
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电化学
·
理论计算
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Yingzheng Li,Shaoqi Zhan,Zijian Deng,Meng Chen,Yilong Zhao,Chang Liu,Ziqi Zhao,Hongxia Ning,Wenlong Li,Fei Li,Licheng Sun,Fusheng Li
Inspired by the function of crucial components in photosystem II (PSII), electrochemical and dye-sensitized photoelectrochemical (DSPEC) water oxidation devices were constructed by the self-assembly of well-designed amphipathic Ru(bda)-based catalysts (bda = 2,2ʹ-bipyrdine-6,6ʹ-dicarbonoxyl acid) and aliphatic chain decorated electrode surfaces, forming lipid bilayer membrane (LBM)-like structures. The Ru(bda) catalysts on electrode-supported LBM films demonstrated remarkable water oxidation performance with different O–O formation mechanisms. However, compared to the slow charge transfer process, the O–O formation pathways did not determine the PEC water oxidation efficiency of the dye-sensitized photoanodes, and the different reaction rates for similar catalysts with different catalytic paths did not determine the PEC performance of the DSPECs. Instead, charge transfer plays a decisive role in the PEC water oxidation rate. When an indolo[3,2-b] carbazole derivative was introduced between the Ru(bda) catalysts and aliphatic chain-modified photosensitizer in LBM films, serving as a charge transfer mediator for the tyrosine-histidine pair in PSII, the PEC water oxidation performance of the corresponding photoanodes was dramatically enhanced.
研究领域:
生物化学
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材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiang Pu,Jiahua Zhang,Jinwei He,Zhihui Ai,Xiaoxue He,Xiaojun Zhou,Shiyuan Tong,Xinyue Dai,Qiqi Wu,Jiayu Hu,Jingshu He,Hanguang Wang,Wei Wang,Jinqiu Liao,Li Zhang
The biosynthetic route for flavonol in Camptotheca acuminata has been recently elucidated from a chemical point of view. However, the genes involved in flavonol methylation remain unclear. It is a critical step for fully uncovering the flavonol metabolism in this ancient plant. In this study, the multi-omics resource of this plant was utilized to perform flavonol O -methyltransferase-oriented mining and screening. Two genes, CaFOMT1 and CaFOMT2 are identified, and their recombinant CaFOMT proteins are purified to homogeneity. CaFOMT1 exhibits strict substrate and catalytic position specificity for quercetin, and selectively methylates only the 4′-OH group. CaFOMT2 possesses sequential O -methyltransferase activity for the 4′-OH and 7-OH of quercetin. These CaFOMT genes are enriched in the leaf and root tissues. The catalytic dyad and critical substrate-binding sites of the CaFOMTs are determined by molecular docking and further verified through site-mutation experiments. PHE181 and MET185 are designated as the critical sites for flavonol substrate selectivity. Genomic environment analysis indicates that CaFOMT s evolved independently and that their ancestral genes are different from that of the known Ca10OMT . This study provides molecular insights into the substrate-binding pockets of two new CaFOMTs responsible for flavonol metabolism in C. acuminata .
研究领域:
植物生物化学
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分子生物学
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植物化学
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2015
·
IF 2.729
Hongjuan Li,Ying Liu,Haizhu Jin,Sujing Liu,Shengtao Fang,Chunhua Wang,Chuanhai Xia
Vitexin-4″- O -glucoside and vitexin-2″- O -rhamnoside are the major flavonoids of hawthorn leaves. In this work, the adsorption and desorption characteristics of vitexin-4″- O -glucoside and vitexin-2″- O -rhamnoside on seven macroporous resins were evaluated. Among the tested resins, the HPD-400 resin showed the best adsorption and desorption capacities. Adsorption isotherms were constructed for the HPD-400 resin and well fitted to Langmuir and Freundlich models. Dynamic adsorption and desorption tests were performed on column packed with the HPD-400 resin to optimize the chromatographic parameters. After one run treatment with the HPD-400 resin, the contents of vitexin-4″- O -glucoside and vitexin-2″- O -rhamnoside in the product were increased 8.44-fold and 8.43-fold from 0.720% and 2.63% to 6.08% and 22.2% with recovery yields of 79.1% and 81.2%, respectively. These results show that the developed method is a promising basis for the large-scale purification of vitexin-4″- O -glucoside and vitexin-2″- O -rhamnoside from hawthorn leaves and other plant materials.
研究领域:
植物化学
·
分离纯化技术
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Worku Lakew Kebede,Dong-Hau Kuo,Xiaoyun Chen
Environment and energy are presently some of the highest priority topics for mankind that need to be addressed. Organic pollutants are toxic and carcinogenic for human and aquatic life hence their presence in water even in low concentrations can cause serious health problems. Photodegradation of organic pollutants by utilizing oxide-based heterostructure photocatalysts is the promising approach to carry out remediation efficiently ascribed to the advanced optoelectronic and structural superiority of oxide photocatalysts. The Zn(O,S)/Mo(O,S) 2 composites were synthesized via a facile solvothermal method at low temperatures. Several methods were used to characterize the composite morphology, structure, electrical conductivity, chemical composition, and optical characteristics. The heterostructured Zn(O,S)/Mo(O,S) 2 oxysulfide was employed successfully in the photocatalytic degradation of organic pollutants. Among the as-prepared samples, the 30-ZnMoOS composite catalyst was found to have the highest photodegradation performance on various organic dye pollutants. The photocatalytic activity of the as-synthesized Zn(O,S)/Mo(O,S) 2 samples was assessed on the photodegradation of different kinds of organic dyes under visible light irradiation. The photocatalytic degradation efficiency of 30-ZnMoOS composite over 10 ppm neutral red (NR), methylene blue (MB), rhodamine B (Rh B), and methyl orange (MO) was found to be 99.6 %, 99.9 %, 99.5 %, and 98.8 % within 40, 45, 180, and 180 min, respectively, under visible light illumination. In the present photocatalytic system, the superoxide ( . O 2 - ) anions, hydroxyl ( . OH) radicals, and holes (h + ) are proposed to be the direct reactive species causing the photodegradation of organic dyes.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 36
·22485-22491
·
IF 3.108
Hailiang Zhao,Shanshan Tang,Qun Zhang,Lin Du
The weak intermolecular interaction between 2,2,2-trifluoroethanol (TFE) and 3-chloro-2-methyl-1-propene (CMP) has been investigated by gas phase FTIR spectroscopy and DFT calculations. CMP offers two hydrogen bond docking sites to the hydrogen bond donor: the chlorine atom (O–H⋯Cl) and the CC π electron system (O–H⋯π). DFT calculations suggest that MeOH approaches CMP in five different orientations. The structural, energetic, and spectroscopic parameters of the most stable structures in each orientation were studied, and their binding energies range from −25.5 to −19.5 kJ mol−1. The docking to the π system is at least 1 kJ mol−1 more favored than the docking to the chlorine atom. The equilibrium constant for complexation (2.3 × 10−2) was determined from the experimental and calculated intensity of the OH-stretching transition. The Gibbs free energy of formation was found to be 9.3 kJ mol−1. The nature of the non-covalent interaction was analyzed with the atoms in molecules (AIM) method.
研究领域:
物理化学
·
结构化学
·
分子光谱学
·
量子化学计算
·
分子间相互作用
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Hongjie Zhu,Lingxuan Gong,Zhengkui Li
There is a great need to design a new method for fabricating efficient and cheap Z-scheme photocatalysts. For this reason, we synthesized a novel Z-scheme photocatalyst α-Fe 2 O 3 /P3HT with O-Ti-O charge transfer mediator. The effective compounding of each part was confirmed by different characterization methods. The charge transfer mechanism was confirmed to obey the Z-scheme mechanism by measuring the valence band value and by ESR experiments. Moreover, the Z-scheme mechanism in this system was further discussed based on the observed changes in the chemical structure and the theoretical calculation. Based on the characterization of the optical properties, this novel catalyst exhibited better charge transfer and separation abilities under visible light conditions due to its unique architecture. Additionally, this novel Z-scheme photocatalyst showed enhancement in the bisphenol A degradation effect, the degradation reaction was pseudo-first-order kinetics, a removal rate of up to 90% was maintained after four cycles. The BPA degradation pathway was also discussed in this study. This study provides a new approach for the construction of Z-scheme photocatalysts.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Chen Qiao,Zahid Usman,Jie Wei,Lin Gan,Jianhua Hou,Yingying Hao,Youqi Zhu,Jiatao Zhang,Chuanbao Cao
A catalyst kinetics optimization strategy based on tuning active site intermediates adsorption is proposed. Construction of the M-OOH on the catalytic site before the rate-determining step (RDS) is considered a central issue in the strategy, which can optimize the overall catalytic kinetics by avoiding competition from other reaction intermediates on the active site. Herein, the kinetic energy barrier of the O–O coupling for as-prepared sulfated Co-NiFe-LDH nanosheets is significantly reduced, resulting in the formation of M-OOH on the active site at low overpotential, which is directly confirmed by in situ Raman and charge transfer fitting results. Moreover, catalysts constructed from active sites of highly efficient intermediates make a reliable model for studying the mechanism of the OER in proton transfer restriction. In weakly alkaline environments, a sequential proton–electron transfer (SPET) mechanism replaces the concerted proton–electron transfer (CPET) mechanism, and the proton transfer step becomes the RDS; high-speed consumption of reaction intermediates (M-OOH) induces sulfated Co-NiFe-LDH to exhibit excellent kinetics.
研究领域:
催化化学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of CO2 Utilization
·
2016
·
IF 4.764
Jing Zhu,Yubo Wang,Chengwei Chang,Hailun Wang,Junsu Jin
To research functional group effect on the solubility of o -aminobenzamide ( o -AB) and o -nitrobenzoic acid ( o -NBA) for each other, solubility of o -AB and its mixture with o -NBA in supercritical carbon dioxide (SCCO 2 ) was measured with dynamic method at temperatures ranging from 308 to 328 K and pressures ranging from 10.0 to 21.0 MPa. Then solubility of o -AB and o -NBA was correlated with four commonly used expanded liquid models. In addition, 2365 solubility data of 90 kinds of solid solute, coupled with solubility of o -AB and o -NBA in this work (2425 data points in total), were used to compare the correlation accuracy of the four expanded liquid models, and the best correlation accuracy was obtained by δ 2 ∼ δ 1 / v 1 model. To evaluate the effect of heat capacity terms that is usually ignored during the derivational process of expanded liquid models, a new expanded liquid method (M- δ 1 / v 1 model) was proposed based on δ 2 ∼ δ 1 / v 1 model and tested by the above mentioned 2425 groups of solubility data. The correlated results showed that M- δ 1 / v 1 model achieved the minimum average absolute relative deviation (AARD, %) 9.72% among the five models of 30.05%, 14.22%, 13.91%, 15.07% for δ 2 ∼ ρ , δ 2 ∼ ρ d , δ 2 ∼ δ 1 / v 1 , and β 12 ∼ ρ 2 models, respectively. Furthermore, the result of statistical tests of δ 2 ∼ δ 1 / v 1 and M- δ 1 / v 1 models indicated that the best correlation accuracy of M- δ 1 / v 1 model could be attributed to the additional consideration of the heat capacity terms, rather than the more adjustable parameters.
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2019
·
IF 3.25
Kedir Ebrahim Ahmed,Dong-Hau Kuo,Worku Lakew Kebede
Heterojunction construction with low band gap materials is an effective way of utilizing UV light active materials under visible light irradiation. Here, we report the synthesis of Bi 2 (O,S) 3 /Zn(O,S) heterostructure using simple solvothermal method without surfactant. The catalysts were investigated with different characterization techniques. All the composite catalysts showed high light absorption capacity in the whole visible light spectrum. The catalytic activity of the catalysts was evaluated by Cr(VI) reduction. While pure Zn(O,S) catalyst showed no significant Cr(VI) reduction, higher photocatalytic activity than individual components were exhibited after heterojunction construction with Bi 2 (O,S) 3 . 20-BiZnOS catalyst with Bi/Zn molar percentage of 20% showed the best photocatalytic activity among the composites with 99.5% Cr(VI) reduction within 12 min under visible light irradiation. Heterojunction formation between Bi 2 (O,S) 3 and Zn(O,S) nanoparticle, and selective adsorption of Cr(VI) and desorption of Cr(III) on the surface of 20-BiZnOS composite catalyst were ascribed to the enhanced photocatalytic activity of the composite catalyst.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）