ATMOSPHERIC ENVIRONMENT
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2022
·
IF 5.755
Wangjin Yang,Di You,Xiangli Nan,Ning Tang,Tao Du,Chong Han
The effects of aromatic carbonyls (ACs), polycyclic aromatic hydrocarbons (PAHs) and phenols (PHs) on the photolysis of nitroaromatic compounds (ArNO 2 ) in the solid phase were explored. The reactive nitrogen gas formation by the photolysis process was investigated in a cylindrical reactor coupled to a NO x analyzer. These organics had an enhanced or inhibited influence on the nitrous acid (HONO) and NO formations by the photolysis of 1-nitropyrene (NPy) and 5-nitrosalicylic acid (NSA), depending on the hydrogen abstraction and donation abilities of organics. Based on the high-performance liquid chromatography (HPLC) results, methyl-2-benzoylbenzoate (MBB), fluoranthene (FLA) and syringaldehyde (SG) showed a promoted effect on the photodegradation of NPy and NSA, as shown by an increase in the photolysis frequency of ArNO 2 ( J ArNO 2 ) by a factor of 1.19–2.76. Based on experimental results, the HONO source strength by the photolysis of ArNO 2 in organic aerosols was estimated to be lower than 1 ppt h −1 .
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120447
·
IF 7.2
Fenglan Fan,Lei Wang,Kang Guo,Xinyu Zhang,Shaomian Liu,Jie Xu,Hongli Chen,Jian Yu,Boxiong Shen,Wenqing Xu,Ziyi Zhong,Fabing Su
Currently, the primary challenge in industrial applications of CO-selective catalytic reduction of NO (CO-SCR) is the shortage of efficient catalysts that can tolerate the presence of oxygen (O 2 ). In this study, guided by density functional theory (DFT) calculations, we have developed an effective Co 3 O 4 catalyst incorporated with both oxygen vacancies (V O ) and cobalt vacancies (V Co ). This catalyst achieved 100 % NO conversion and 100 % N 2 selectivity at temperatures ranging from 200 to 350 °C, even in the presence of up to 5 vol% O 2 . DFT calculations and experimental results demonstrate a strong interaction between V O and V Co in the CO-SCR process. The presence of V Co enhances the NO adsorption on adjacent O atoms and promotes the formation of nitrite intermediates. Meanwhile, V Co and V O synergistically promote the dissociation of N-O bonds, thereby improving the NO conversion and the N 2 selectivity. This approach opens up new possibilities for designing advanced catalysts tailored for various environmental and industrial applications.
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SCIENTIA HORTICULTURAE
·
2025
·
IF 4.2
Peng Zhang,Miaomiao Lin,Gloria De Mori,Congcong Li,Guido Cipriani,Sumei Li,Qina Zhang,Zhenzhen Zhang,Yihang Li,Leiming Sun,Jinbao Fang,Xiujuan Qi
Kiwifruit has extremely high nutritional value, but its rootstock strongly influences the physiology and metabolism of its scion fruit. Here, we evaluated the influence of a new kiwifruit rootstock, Actinidia valvata ′Zhongmikangzhen No. 2′, on the leaves and fruits of the scion A. deliciosa ′Zhongmi 2′. The leaf size, leaf mineral element contents, fruit size (single-fruit weight, longitudinal diameter and transverse diameter), and fruit quality traits (soluble sugar content, vitamin C content, total acidity and dry matter content) of ′Zhongmi 2′ grafted on ′Zhongmikangzhen No. 2′ (zk) and A. deliciosa seedling (zp) rootstock were measured at five fruit developmental stages (30, 60, 90, 120, and 150 days after flowering (DAF)). The zk fruits were significantly larger than those of zp and their leaves were also longer. The leaf length and width of the zk fruits was significantly greater than those of the zp fruits. The leaf contents of Cu, P and Mo significantly differed at 60, 120 and 120 DAF, respectively. The fruits of the two stock–scion combinations may presented different flavors. UPLC–MS/MS analysis of the fruit metabolome revealed 1697 differentially expressed metabolites. These metabolites, which were divided into multiple categories through KEGG analysis, indicated significant differences in fruit quality and resistance. Decanoic acid (decreased in zk-hard) and 9-oxononanoic acid (increased in zk-hard) may collectively affect fruit aroma. Moreover, α-linolenic acid and 12-oxo-phytodienoic acid (a precursor of jasmonic acid), both of which increase in zk-hard, contribute to increased nutritional value and are involved in the abiotic stress response, respectively. This study revealed the effects of different rootstock–scion combinations on fruit quality traits and leaf mineral elements and provides a basis for studying the mechanisms of rootstock–scion interactions.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Qianwen Cao,Luyao Liu,Xiaoge Ma,Chaomin Zhong,Mengqi Tang,Mengge Liu,Ling-Bo Qu,Bo Wei,Xia Xu
1, 8-Cineole (Cin), a cyclic monoterpenoid derived from tea trees and eucalyptus species, exhibits diverse pharmacological properties. Yet, its therapeutic impact and underlying mechanism against Staphylococcus aureus (S. aureus) pneumonia remain to be elucidated. In this study, metabolomics based on UPLC-MS/MS was integrated with network pharmacology, molecular biology, and molecular docking to investigate the effects of Cin. The findings demonstrated that Cin markedly reduced mortality and lung bacterial load, lessened pulmonary damage while suppressing the levels of proinflammatory factors, including tumor necrosis factor α (TNF-α), interleukin-1β (IL-1β), and interleukin-6 (IL-6) in the bronchoalveolar lavage fluid (BALF) of infected mice. Additionally, 19 metabolites, primarily involved in tryptophan metabolism and arginine biosynthesis, were notably modified by Cin via suppressing the enzymatic activity of indoleamine 2, 3-dioxygenase 1 (IDO1) and inducible nitric oxide synthase (iNOS), thereby attenuating the inflammatory response. Notably, knockdown of IDO1 or iNOS significantly diminished the anti-inflammation effect of Cin. In conclusion, our study validates the therapeutic potential of Cin against S. aureus pneumonia via anti-inflammation by downregulating IDO1 and iNOS. Our results provide a theoretical basis of natural substances applied in bacterial pneumonia treatment.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shuya Rui,Na Liu,Lingwei Ren,Yang Liu,Zian Liu,Binghui Wu,Hua Pan,Zhiping Ye
Traditional Mn-Ce catalysts for selective catalytic reduction (SCR) of NO with CO (CO-SCR) in iron and steel flue gases are often hindered by competitive adsorption of NO and CO, which compromises catalytic efficiency. In this study, we present a Ni-doped Mn-Ce catalyst that overcomes these challenges, achieving 96 % NO conversion, 98 % N 2 selectivity, and 44 % CO conversion at 175 °C. Comprehensive characterization of the catalyst reveals that Ni doping significantly enhances Mn-Ce interactions, boosting oxygen vacancy density and promoting efficient redox cycling between Mn 3 + /Mn 4+ and Ce 3+ /Ce 4+ . Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms preferential NO adsorption at oxygen vacancy sites, minimizing CO-NO competition and stabilizing the Langmuir-Hinshelwood mechanism, where both gases co-adsorb and react at oxygen-rich vacancies. Mechanistic insights suggest that Ni facilitates electron transfer, weakening the N–O bond in NO and accelerating its dissociation, resulting in faster NO reduction. This study establishes Ni doping as a promising strategy for improving the low-temperature performance of Mn-Ce-based CO-SCR catalysts, paving the way for more efficient catalytic systems.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuerui Ma,Peng Chen,Jiazhen Liao,Xing’an Dong,Wenjie He,Wendong Zhang
Selective photocatalytic oxidation of NO to nitrate (NO 3 – ) over toxic NO 2 remains challenging due to low selectivity and inefficient charge migration in existing systems. This study introduces Fe 3+ as an electron acceptor beneath a Bi 4 TaO 8 Cl/Bi 2 O 2 CO 3 heterojunction to precisely regulate electron pathways and promote targeted hydroxyl radical ( • OH) generation. Combined experimental and DFT analyses reveal Fe 3+ ’s dual role: enhancing interfacial electron transfer and activating H 2 O at surface sites to form • OH. The optimized heterojunction achieves 68.19 % NO conversion with minimal NO 2 selectivity (10.98 %). ESR and ROS quenching confirm Fe 3+ -driven electron migration enriches surface holes, boosting H 2 O adsorption and • OH production (2.76-fold increase). The strong oxidation capacity of • OH suppresses NO 2 formation, favoring complete NO oxidation to NO 3 – . This work provides a strategic approach for selective NO removal by electron-pathway engineering, advancing the design of eco-friendly photocatalysts for air pollution control.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 5
·e70148
·
IF 0
Han Zhang,Sisi Wang,Jingshu Ban,Hao Li,Le Ruan,Fushun Tang
In this paper, the NO adsorption performances of Ni-AIP MOF and Ni-AIP-BPY MOF synthesized by solvothermal method were compared, and the NO adsorption selectivity of two samples for the simulated flue gas conditions has also been studied. The results indicated that the Ni-AIP-BPY exhibited better NO adsorption performance with an NO adsorption capacity of 115.52 cc·g −1 at 100 kPa and ambient temperature and showed better adsorption selectivity with the highest adsorption selectivities of 937 and 10,691 for NO/CO 2 and NO/O 2 , respectively. Adsorption enthalpy calculations showed that Ni-AIP-BPY had a strong interaction force on NO, XPS and in-situ NO-FTIR results also confirmed that a strong adsorption occurred on the Ni metal center, and the main adsorptive products after NO adsorption were nitrate and nitrite. The introduction of a second ligand into the saturated coordination amine-containing complexes can improve the pore structure and coordination state of the materials, so that the complexes can activate unsaturated metal sites, thus significantly improving their adsorption and separation performance for NO gas molecules in flue gas. The results provided a new idea and understanding for the synthesis of materials for selective separation of NO components in flue gas.
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INDUSTRIAL CROPS AND PRODUCTS
·
2025
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IF 6.2
Qishan Xie,Jiawei Yang,Jianwei Wang,Lufan Yang,Bingye Yang,Han Yan,Aiguo Wang,Xiang Zhang,Ying Cui,Shengfeng Wang,Xuan Chen,Xinyi Zhang,Penghui Lyu,Yanling Zhang
Early aging is critical for colour formation in tobacco leaves, yet the underlying metabolic mechanisms remain elusive. This study integrated image processing with untargeted and targeted LC-MS to construct a metabolic network characterising colour evolution in flue-cured tobacco (cv. Cuibi-1, CB-1 ) during early aging (0–120 days). Results indicated that leaf colour significantly brightened during the first 30 days, followed by deepening and reddening. Specifically, L* and b* values showed an initial increase followed by a decrease, whereas the a* value exhibited a sustained upward trend. The constructed metabolic network was anchored in saccharide metabolism, connecting downstream phenolic, flavonoid, sphingolipid, and terpenoid pathways. Sixteen differentially accumulated metabolites (DAMs) were identified across categories including alcohols, flavonoids, lignans, nucleotides, phenolic acids, saccharides, and xanthophylls. These DAMs exhibited distinct change patterns and significant correlations with colour parameters (L* and a*, r ranging from −0.88 to −0.58 and 0.56–0.74, respectively; P < 0.05). For the first time, this study elucidated the metabolic mechanisms governing colour changes in CB-1 tobacco leaves during early aging for the first time, providing novel insights for assessing aging progression and maintaining high-value raw material quality.
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高影响因子
POLYMER
·
2025
·
IF 4.5
Gang Tang,Yani Zhang,Feilong Wang,Zhenfeng Cheng,Haojie Shi,Tiwen Xu,Xiuyu Liu,Xin Wang
The flammability of bismaleimide (BMI) resins limits the application in cutting-edge fields. However, the addition of phosphorus-containing flame retardants results in deteriorated thermal stability of BMI resins. A phosphorus-free flame retardant strategy has been adopted to modify BMI resins while preserving high heat resistance. 3, 3’-Bisallyl-4,4’-bishydroxydeoxybenzoin (BA-BHDB) was synthesized from desoxyanisoin and used as a modifier for BMI resins by replacing conventional 2, 2’-diallylbisphenol A (DBA). The thermal, mechanical and flammability properties of BA-BHDB-cured BMI resins were investigated and compared with those of DBA-cured BMI resins. The cured BA-BHDB-BMI resins exhibit an LOI value for combustion of 35.0% and a UL-94 V-0 rating, whereas the cured DBA-BMI resins display a lower LOI value of 30.0% and a UL-94 V-1 rating. In the cone calorimeter measurements, the PHRR and THR values for combustion of BA-BHDB-BMI were 381.1 kW/m 2 and 92.5 MJ/m 2 , which were 53.2% and 25.2% lower than those of DBA-BMI, respectively. Additionally, the heat resistance of the cured BA-BHDB-BMI resins was greater than that of the DBA-BMI resins, with an initial thermal decomposition temperature of 428 °C and a glass transition temperature of 285 °C. The excellent anti-flammability of BA-BHDB-BMI may be attributed to the superior charring capacity of BA-BHDB, which contributes to the formation of a dense and protective char layer during thermal decomposition.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Jieyun Zhang,Xiaoxia Chen,Xieraili Maimaitiyiming,Ablikim Obolda
The accurate determination of NO 2 concentration in exhaled gases is imperative for discriminating between patients with respiratory/cardiovascular diseases and healthy individuals. Therefore, it is important to employ a streamlined and expeditious methodology for the detection of NO 2 . Semiconducting single-walled carbon nanotubes (sc-SWCNTs) exhibit immense potential as next-generation gas sensors due to their high specific surface area, distinctive atomic structure, and remarkable electrical responsiveness to the surrounding environment. In this work, two conjugated polymers (fluorene-alt-C-benzene (PFCN) and fluorene-alt-N-benzene (PFNC)) were synthesized by the Suzuki coupling, featuring positional isomerism of imine groups (-CH=N- vs. -N = CH-). The introduction of a phenyl side chain via imine bonds (-CH=N-) not only enhances the polymer but also regulates the alignment of the imine groups via steric and electronic effects, optimizing their interaction with sc-SWCNTs. The resulting polymer/sc-SWCNTs complexes were utilized for sensor fabrication. In PFCN, more electronegative N atom is positioned away from the skeleton-forming main chain, increasing its environmental exposure and enabling effective attraction of electron-deficient NO 2 . Consequently, the PFCN/sc-SWCNTs sensor showed a significantly higher response (27.6 %) to 1 ppm NO 2 , which was 1.7-fold higher than the PFNC/sc-SWCNTs sensor (16.52 %). This study presents novel strategies for designing high-performance sensors by integrating sc-SWCNTs with imine-functionalized polymers, advancing sensitive NO 2 detection for applications such as non-invasive medical diagnostics.
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高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-8
·
IF 5.578
Niu Xiaoyu,Zhao Tieying,Yuan Fulong,Zhu Yujun
The hollow CuO@SiO 2 spheres with a mean diameter of 240 nm and a thin shell layer of about 30 nm in thickness was synthesized using an inorganic SiO 2 shell coating on the surface of Cu@C composite that was prepared by a two-step hydrothermal method. The obtained hollow CuO@SiO 2 spheres were characterized by ICP-AES, nitrogen adsorption-desorption, SEM, TEM, XRD, H 2 -TPR, CO-TPR, CO-TPD and NO-TPD. The results revealed that the hollow CuO@SiO 2 spheres consist of CuO uniformly inserted into SiO 2 layer. The CuO@SiO 2 sample exhibits particular catalytic activities for CO oxidation and NO + CO reactions compared with CuO supported on SiO 2 (CuO/SiO 2 ). The higher catalytic activity is attributed to the special hollow shell structure that possesses much more highly dispersed CuO nanocluster that can be easy toward the CO and NO adsorption and the oxidation of CO on its surface.
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高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Shuhao Li,Feng Wang,Zongli Xie,Derrick Ng,Boxiong Shen
Zeolitic imidazolate framework-8 (ZIF-8) based catalysts are considered as promising candidates for the selective catalytic reduction of NO by CO (CO-SCR) reaction due to their large specific surface area. However, the structure of ZIF-8 will be damaged during the synthesis procedure of the catalyst, leading to a decrease in their physical properties, which in turn affects the catalytic performance of the catalyst. Herein, a CeO 2 -ZIF-8 core-shell structure was synthesized and doped with Fe, resulting in the formation of Fe@CeO 2 -ZIF-8, for CO-SCR reaction. Characterization results show that the Fe@CeO 2 -ZIF-8 core-shell catalyst has better morphology, thermal stability, and higher specific surface area than the FeCe co-impregnated ZIF-8 catalyst (FeCe@ZIF-8 (IM)). Moreover, the reducibility of the reactive Fe species in the Fe@CeO 2 -ZIF-8 core-shell catalyst is also enhanced. As a result, the Fe@CeO 2 -ZIF-8 core-shell catalyst exhibited higher low-temperature CO-SCR catalytic activity with its NO conversion reaching 99% at 250 °C versus the FeCe@ZIF-8 (IM) catalyst (89% at 250 °C). The experimental results were further verified by density functional theory (DFT) calculations including Electron Localization Function (ELF), Valence Charge Density Difference (VCDD), Projected Density of States (PDOS) and Bader charge analyses. The calculation results revealed that the core-shell configured Fe@CeO 2 -ZIF-8 catalyst has a stronger active metal-support charge transfer and better capacity for the adsorption of the reactants. The reaction mechanism over Fe@CeO 2 -ZIF-8 core-shell catalyst was investigated via in situ DRIFTS experiments, and results showed that the nitro compounds and formate species are critical intermediates in this reaction at a higher temperature range (300–350 °C). This work provides a new strategy for the synthesis of ZIF-8 based catalysts with better properties for CO-SCR reaction.
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