Food Chemistry-X
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2025
·
IF 8.2
Jian Ouyang,Ronggang Jiang,Huimin An,Xingchang Ou,Jing Wang,He Xie,Wenjie Fu,Jing Zhang,Hongyu Chen,Qi Liu,Juan Li,Haitao Wen,Ligui Xiong,Jian-an Huang,Zhonghua Liu
Rucheng Baimaocha ( Camellia pubescens ) black tea (RCBT) exhibits floral and sweet attributes with a unique minty-like aroma, distinguishing it from traditional and other innovative black teas. However, its key odorants remain unknown. In this study, gas chromatography-olfactometry (GC-O) combined with aroma extraction dilution analysis detected 26 aroma-active compounds (ACCs), of which 20 ACCs were quantified as odorants of RCBT infusion. In addition, aroma recombination models well simulated the overall aroma characteristics of RCBT infusion, which proved the accuracy of identification and quantification. Omission experiments showed that 12 key odorants played crucial roles in aroma formation of RCBT. Among these, four odorants (methyl salicylate, ( E , Z )-2,6-nonadienal, methyl geranate, and ( E )-2-nonenal), were of great importances for unique minty-like aroma, with significantly higher concentrations compared to other black tea varieties. This study offered a foundational theoretical framework for the processing and quality control of RCBT.
研究领域:
食品科学
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植物学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Xiaoyun Zhang,Yinhang Zhang,Yuxin Su,Shuo Guan
Protonated Mannich base N,N′-bis(3-oxo-3-phenylpropyl)ethane-1,2-diamine dihydrochloride (EDAM) was synthesized and its chemical structure was characterized by means of 1 H NMR, 13 C NMR, Fourier-transform infrared spectroscopy (FTIR) and elemental analysis. The synergistic inhibitive effect of EDAM with allicin on N80 steel in 15 % lactic acid solution at 363 K was investigated using weight loss experiments, electrochemical tests, and surface analysis techniques (including scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray Photoelectron Spectroscopy (XPS), and contact angle measurement), quantum chemical calculation and molecular dynamics (MD) simulation methods. The results show that the inhibition performance was significantly improved by combining EDAM and allicin. The inhibition efficacy (IE) reached 99.60 % at the mass ratio of 10:1 (EDAM/allicin) with total inhibitor dosage of 0.1 %. Electrochemical impedance test (EIS) proves that the charge transfer-controlled corrosion process is greatly hindered with the addition of allicin. The small changes in the corrosion potential of Tafel curves indicate that the complex system is a hybrid corrosion inhibition mechanism. SEM, AFM , XPS and contact angle surface analyses suggest that EDAM in cooperation with allicin forms a dense and strongly adsorbed protective film on the metal surface. The density functional theory (DFT) and molecular dynamics simulation (MD) calculations further elucidate the mechanism of the synergistic corrosion inhibition effect.
研究领域:
材料科学
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腐蚀工程
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化学工程
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表面化学
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高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Rui Li,Yingdan Ye,Yibin Zhang,Huaiyuan Zhao,Weichen Du,Zhaoyin Hou
Dehydrogenation of cyclohexanol to cyclohexanone is a vital step in manufacturing nylon; however, this endothermic reaction is unfavourable at low temperatures. In this work, a high-entropy oxide (Cu0.75Zn0.15Mg7.1Al1Sc1O11-HEO) was synthesized from a well-structured Cu0.75Zn0.15Mg7.1Al1Sc1(OH)20CO3 layered double hydroxide. Characterization results disclosed that Cu0.75Zn0.15Mg7.1Al1Sc1O11-HEO possesses a large specific surface area (157 m2 g−1), enhanced basicity and high Cu dispersion in the framework of HEO (74.0%). The reduced Cu0.75Zn0.15Mg7.1Al1Sc1O11-HEO catalyst was highly active and stable in the dehydrogenation of cyclohexanol compared with Cu-based catalysts prepared using binary, ternary, and quaternary mixed metal oxides. More interestingly, the conversion of cyclohexanol could be enhanced when acetone was used as the solvent and/or hydrogen acceptor. Thus, it was confirmed that the addition of acetone can enhance the yield of cyclohexanone and simultaneously result in the hydrogenation of acetone to isopropanol.
研究领域:
化学工程
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催化科学
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DOI
高影响因子
Journal of Analysis and Testing
·
2025
·
IF 7
Li Han,Cui Yuanyuan,Zhen Changqing,Lin Xiaohui,Li Ke,Yang Chengxiong
Microporous organic network (MON) has emerged as efficient stationary phases for high-performance liquid chromatographic (HPLC) separation. Nevertheless, the inherent superhydrophobic networks made their applications limited in the reversed-phase (RP) mode. In this work, a novel amino acid L-cysteine (L-Cys) modified core-shelled microsphere MON@SiO 2 -L-Cys was synthesized via the efficient thiol-yne “click” reaction for hydrophilic interaction chromatography /reversed-phase liquid chromatography (HILIC/RPLC) mixed-mode chromatographic separation. Baseline separation of various hydrophilic and hydrophobic compounds including aromatic ketones, phthalate esters, alkylbenzenes, amines, polycyclic aromatic hydrocarbons, phenols, nucleosides, nucleic acid bases, sulfonamides, water-soluble vitamins, cephalosporin antibiotics, and estrogens was realized on MON@SiO 2 -L-Cys packed column based on the predesigned mixed-mode retention mechanisms. The MON@SiO 2 -L-Cys packed column also exhibited higher selectivity compared to bare SiO 2 , MON@SiO 2 without L-Cys, and C 18 packed columns, revealing the synergistic interactions of MON’s networks and the modified L-Cys molecules. This work provided a feasible way to construct a novel amphipathic MON-based stationary phase, broadened the application scope of MON for hydrophilic analytes, and uncovered the prospects of MON in mixed-mode HPLC.
研究领域:
分析化学
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材料科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qianchun Zhang,Jiumei He,Chengcheng Wan,Xixi Long,Zhaoru Ban,Shan Tang,Yanju Chen
Isobutyraldehyde is a harmful gas that poses a threat to both environment and human health. Therefore, it is essential to develop a highly selective, sensitive, and efficient sensor that can rapidly detect isobutyraldehyde traces. In this study, a cataluminescence gas sensor for isobutyraldehyde detection is developed utilizing porous aluminum nitrite. This sensor has a rapid response time and exhibits notable selectivity, stability, and sensitivity to isobutyraldehyde. The sensor operated effectively over a broad linear range of 0.776–310 ppm and achieved a detection limit of 0.155 ppm with a signal-to-noise ratio of 3. When applied to isobutyraldehyde detection in real samples, the developed sensor achieved recoveries in the range of 79.0–96.8 % with relative standard deviations (RSDs) of 4.6–8.7 %. The sensing mechanism was validated through density functional theory and gas chromatography–mass spectrometry. The sensor demonstrated excellent sensing properties, including enhanced sensitivity, selectivity, and stability, indicating considerable potential for trace isobutyraldehyde detection. Furthermore, it shows promise as an effective candidate for detecting other gaseous contaminants.
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
JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Dawei Li,Xinyue Zhang,Yibing Sun,Yuanqing Bu,Hongchao Li,Jieshu Qian
The utilization of copper oxide (CuO) as a catalyst in the peroxymonosulfate (PMS) activation process holds great promise for effectively degrading aqueous organic pollutants , while the relevant mechanism remains inadequately understood. In this study, we delve into the evolution pathways of reactive species in the CuO/PMS system through a comprehensive series of experimental analyses. Our findings indicate that various reactive species are generated in the CuO/PMS system with the specific sequence, where the decomposition of surface Cu(II)-OOSO 3 − leads to the formation of surface Cu(III) species, which are responsible for the subsequent generation of HO • . The reactivity of these reactive species and the sequence of their generation explain the distinct oxidation behaviors of pollutants with different values of ionization potential (IP). In addition, singlet oxygen ( 1 O 2 ) may be produced during the PMS activation process, while its involvement in the oxidation of substrates is deemed negligible. This investigation presents a novel perspective, enhancing our comprehension of the mechanism underlying transition metal-mediated PMS activation processes. Environmental implication The removal of refractory organic contaminations in water constitutes a fundamental concern within the realm of environmental pollution management. Peroxymonosulfate activation induced by transition metal oxides has garnered significant recognition as a promising technological approach for the degradation of aqueous organic contaminants , while the underlying mechanism remains enigmatic. In this study, we systematically investigate the evolution pathways of reactive species in the CuO/peroxymonosulfate system to reveal the mystery of the reaction mechanism between CuO and peroxymonosulfate. The outcomes of our study contribute to enhancing the practical applicability of transition metal-triggered PMS activation processes.
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Bin Chen,Jun Hu,Zhihao Yu,Lin Zhu,Chunzheng Wu,Hongbo Yu
Improving catalytic hydrogenation by modifying noble metal catalysts with metal-oxide promoters is promising, but precisely controlling the metal–promoter interface to optimize performance is still challenging. In this study, we created Ir-SnO2/SiO2 nanocatalysts with different Ir/Sn ratios using IrSn alloy precursors through careful calcination and reduction treatments. The SnO2-promoted catalysts showed much better conversion and selectivity than the original Ir/SiO2 catalyst toward the hydrogenation of acetophenone to phenylethanol. The Ir-SnO2/SiO2 catalyst with an Ir/Sn molar ratio of 5/1 (i.e., sample Ir5-(SnO2)1/SiO2) performed the best, achieving a 94% conversion rate and 99% selectivity. Our study found that SnO2 promoters could reduce the surface electron density of the Ir nanoparticles (NPs), enhancing the adsorption of reactants; meanwhile, the new Ir-SnO2 interface is more active for the dissociation of hydrogen compared to Ir alone. The optimal Ir5-(SnO2)1/SiO2 catalyst has demonstrated versatility by effectively catalyzing the hydrogenation of C═O bonds in a wide range of compounds, showing significant potential for various industrial applications in fine chemical synthesis and energy conversion.
研究领域:
催化化学
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材料科学
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工业化学
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DOI
高影响因子
Insects
·
2024
·Vol. 15
·期 11
·866
·
IF 2.7
Chen Wang,Dianxuan Wang,Fangfang Zeng,Liang Chen,Xinxin Zhao,Xi Zhu,Junji Yao,Yihan Li
Simple SummaryThe Indian meal moth,Plodia interpunctella(Hübner, 1813) (Lepidoptera: Pyralidae), exhibited significant differences in oviposition preference between normal-oleic peanuts (NOPs) and high-oleic peanuts (HOPs). In this study, we found key volatile organic compounds (VOCs) from NOP and HOP peanuts that were attractive or repellent toP. interpunctellafemales by gas chromatography/mass spectrometry (GC-MS), gas chromatography/electroantennographic detection (GC-EAD), and electroantennogram (EAG) analysis, as well as behavioral responses in Y-tube olfactometer and wind tunnel bioassays. The identification of key VOCs may provide a foundation for developing food-based attractants and repellents for pest control.The Indian meal moth,Plodia interpunctella(Hübner, 1813) (Lepidoptera: Pyralidae), a primary stored peanut insect pest, exhibited a significant difference in oviposition preference among normal-oleic peanuts (NOPs) and high-oleic peanuts (HOPs). Identifying key volatile organic compounds (VOCs) that are attractive or repellent toP. interpunctellais of great significance for the ecological management of pests. The profiles and contents of VOCs among NOP and HOP varieties were measured and compared, and key bioactive VOCs were further confirmed via an electroantennogram (EAG) analysis, as well as behavioral responses in Y-tube olfactometer and wind tunnel bioassays. Females prefer to lay eggs on NOP varieties more than on HOP ones. Acetophenone, nonanal, decanal, dodecane, 2,5-dimethylbenzaldehyde, and 4-ethyl-benzaldehy derived from tested peanuts elicited stronger antennal EAG responses. The results of the Y-tube olfactometer and wind tunnel bioassay showed that the relative high levels of nonanal, dodecane, and unique VOC acetophenone in NOP varieties have a significant attraction toP. interpunctella. Conversely, 4-ethyl-benzaldehyde and the unique VOC 2,5-dimethyl-benzaldehyde commonly found in HOP varieties exhibit notable repellent effects onP. interpunctella. These VOCs could contribute to the development of attractants or repellents derived from special peanut varieties for pest management.
研究领域:
昆虫学
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生态学
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害虫管理
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PubMed
高影响因子
Sustainable Energy & Fuels
·
2024
·Vol. 8
·期 19
·4496-4506
·
IF 5
Jifang Zhang,Jinde Sun,Chengcheng Suo,Wei Li,Sha Luo,Bing Tian,Chunhui Ma,Shouxin Liu
The low efficiency of photogenerated charge transfer to generate reactive oxygen species is the main factor that limits the photocatalytic activity of ZnIn2S4 (ZIS)-based materials in lignin depolymerization. In this work, we prepared an efficient ZIS catalyst with a hexagonal crystal structure and three-dimensional flower-like micromorphology by a solvothermal method. The ZIS catalyst possessed abundant active sites and efficient light-harvesting ability. Sulfur vacancies (Sv) were introduced into the ZIS photocatalyst (ZIS-Sv) to enhance its electron-withdrawing ability and promote the separation and transfer of photogenerated charges. Using the ZIS-Sv photocatalyst, the conversion rate of Cα–Cβ bonds in the β-O-4 dimer reached 96.31% and the molar yields (selectivity) of phenol and acetophenone were 695.17 μmol g−1 h−1 (85.14%) and 610.66 μmol g−1 h−1 (74.73%), respectively (with a ZIS-Sv0.6 concentration of 1 mg ml−1, irradiation time of 6 h, ethanol content of 90%, pH of 5, and 2-phenoxyacetophenone concentration of 1 mg ml−1). The photocatalytic depolymerization of dioxane lignin by the ZIS-Sv photocatalyst reached an efficiency of 80.42%. Catalyst characterization results and mechanism studies indicated that Sv promoted effective electron adsorption to generate oxygen radicals ˙OH and ˙O2− through O2 single-electron reduction and H2O decomposition, respectively. Then, the oxygen radicals combined with C-centered radicals to form unstable intermediates, further breaking lignin linkages, which finally formed an efficient indirect oxidation process. It is expected that introducing Sv into ZIS materials is a useful strategy to obtain photocatalysts for Cα–Cβ cleavage to realize efficient photocatalytic lignin depolymerization.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Chen Guangyu,Fu Cenfeng,Zhang Wenhua,Gong Wanbing,Ma Jun,Ji Xiaomin,Qian Lisheng,Feng Xuefei,Hu Chuansheng,Long Ran,Xiong Yujie
Solar-driven, selective biomass hydrogenation is recognized as a promising route to renewable chemicals production, but remains challenging. Here, we report a TiO 2 supported Cu single-atom catalyst with a four-coordinated Cu 1 −O 4 structure, which can be universally applied for solar-driven production of various renewable chemicals from lignocellulosic biomass-derived platform molecules with good yields using green methanol as a hydrogen donor, to address this challenge. It is significant that the biomass upgrading driven by natural sunlight on a gram scale demonstrates the great practical potential. By combining in situ soft X-ray absorption spectroscopy with theoretical calculations, we successfully identify the dynamic evolution of Cu sites along with the biomass hydrogenation and methanol oxidation, where the tandem process is enabled by the photogenerated electrons and holes to complete a chemical cycle. The concept of solar-driven biomass hydrogenation proposed here provides an efficient and sustainable methodology for the sustainable production of renewable chemicals.
研究领域:
化学工程
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催化科学
·
可再生能源
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DOI
PubMed
高影响因子
WATER RESEARCH
·
2026
·
IF 12.8
Yue Wang,Jingyi Lin,Yonghuan Zhao,Weiguang Lv,Bo Liang,Peihua Li,Kaisheng Zhang,Xing-jiu Huang
Tetracycline (TC) is widely detected in natural waters, yet its transformation under environmentally relevant oxidative conditions remains poorly understood, because most previous studies have focused on engineered oxidation systems employing strong oxidants or external energy input. Here we show that humic-like phenolic moieties can act as active mediators to redirect δ-MnO 2 -driven TC transformation from slow direct oxidation to a phenoxy-radical-mediated coupling pathway. Screening of 18 humic-acid model compounds identified acetosyringone (AS) and syringaldehyde (SyrA) as the most effective co-reactants, increasing the apparent rate constants ( k obs ) of TC by about 8.5- and 5.9-fold, respectively. Analyses indicate that TC transformation is governed by syringyl-type phenoxy radicals generated via surface-mediated one-electron transfer on δ-MnO 2 , with reactivity controlled by the fraction of deprotonated phenolic precursors (ArO − ) over a near-neutral pH range. The structure-activity analysis further revealed that ortho‑methoxy and para-carbonyl functionalities favor radical stability and cross-reactivity, whereas para-carboxyl substitution biases the mediator toward self-coupling and unproductive oxidant consumption. These substituent-dependent trends provide molecular-level insight into how humic-like phenolics regulate TC transformation at Mn oxide interfaces.
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PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Bo Sui,Shanshan Ma,Shihao Sun,Hongtu Zhang,Hui Xi,Qidong Zhang,Ajuan Yu,Hang Yuan,Haiyang Li,Wuduo Zhao
A vacuum ultraviolet-assisted electrospray ionization (VUV-ESI) hybrid ionization source was developed by orthogonally coupling 124 nm photons to the electrospray plume to enhance the ionization of moderately polar and nonpolar analytes. Using five representative volatile aroma compounds as model analytes, the VUV-ESI system produced signal enhancements of up to 46-fold relative to conventional electrospray ionization. Mechanistic analyses indicate that this enhanced ionization efficiency arises from a synergistic combination of VUV-induced solvent processes and analyte-dependent photoactivation. Specifically, VUV irradiation promotes the formation of protonated solvent clusters that sustain efficient proton-transfer reactions. Concurrently, near-resonant excitation transiently increases the proton affinity of target analytes to favor proton capture, while molecules with relatively low ionization potentials undergo direct single-photon ionization followed by rapid solvent-mediated hydrogen abstraction. Density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations support this analyte-dependent modulation, revealing excitation-induced increases in apparent proton affinity, exemplified by a 19.04 kcal/mol enhancement for azulene. Under optimized conditions, VUV-ESI demonstrated robust quantitative performance with coefficients of determination (R2) ≥ 0.99 and limits of detection down to 12.5 nmol/L. The method also exhibited reliable spike recoveries in complex Baijiu and essential oil matrices. These results establish the VUV-ESI hybrid source as a highly effective analytical platform for overcoming inherent ionization biases and expanding the accessible analyte coverage in mass spectrometry.
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高影响因子
危险品化学品经营许可证（带存储）