CHINESE JOURNAL OF CATALYSIS
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2018
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IF 3.525
Wenjin Xu,Guangxu Zhang,Hanwei Chen,Guomeng Zhang,Yang Han,Yichuan Chang,Peng Gong
Two series of Mn/beta and Mn/ZSM-5 catalysts were prepared to study the influence of how different Mn precursors, introduced to the respective parent zeolites by wet impregnation, affected the selective catalytic reduction (SCR) of NO by NH 3 across a low reaction temperature window of 50–350 °C. In this study, the catalysts were characterized using N 2 adsorption/desorption, X-ray diffraction, X-ray fluorescence, H 2 temperature-programmed reduction, NH 3 temperature-programmed desorption and X-ray photoelectron spectroscopy. As the manganese chloride precursor only partially decomposed this primarily resulted in the formation of MnCl 2 in addition to the presence of low levels of crystalline Mn 3 O 4 , which resulted in poor catalytic performance. However, the manganese nitrate precursor formed crystalline MnO 2 as the major phase in addition to a minor presence of unconverted Mn-nitrate. Furthermore, manganese acetate resulted principally in a mixture of amorphous Mn 2 O 3 and MnO 2 , and crystalline Mn 3 O 4 . From all the catalysts screened, the test performance data showed Mn/beta-Ac to exhibit the highest NO conversion (97.5%) at 240 °C, which remained >90% across a temperature window of 220–350 °C. The excellent catalytic performance was ascribed to the enrichment of highly dispersed MnO x (Mn 2 O 3 and MnO 2 ) species that act as the active phase in the NH 3 -SCR process. Furthermore, together with a suitable amount of weakly acidic centers, higher concentration of surface manganese and a greater presence of surface labile oxygen groups, SCR performance was collectively enhanced at low temperature.
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Catalysts
·
2019
·Vol. 9
·期 6
·519
·
IF 3.444
Jiaming Shao,Fawei Lin,Yan Li,Hairong Tang,Zhihua Wang,Peixi Liu,Guanyi Chen
NO oxidation was conducted over MnOx-CeO2catalysts, which were synthesized by the co-precipitation method. The calcination temperature and third metal doping were the main considerations. MnCe catalysts calcined at 350 °C and 450 °C attained the highest NO conversion efficiency, compared to 550 °C. XRD results suggested that the higher the calcination temperature, the higher the crystallization degree, which led to a negative effect on catalytic activity. Subsequently, Sn, Fe, Co, Cr, and Cu were separately doped into MnCe composites, but no improvement was observed for these trimetallic catalysts in NO conversion. Nevertheless, MnCeSn, MnCeFe, and MnCeCo still exhibited a desirable NO conversion efficiency, so they were tested under SO2addition together with MnCe catalyst. Among them, MnCeFe exhibited the highest NO conversion after whole poisoning testing. XPS results indicated that Fe could protect Mn and Ce metal oxides from being reduced during SO2poisoning process. Furthermore, in in-situ DRIFTS measurement, part of nitrate species maintained undestroyed on the MnCeFe catalyst surface after SO2poisoning. These characteristics reinforced that Fe dropping would achieve better performance under SO2atmosphere.Keywords:MnOx-CeO2;co-precipitation;NO oxidation;SO2resistance;metal addition
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PEST MANAGEMENT SCIENCE
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2025
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IF 3.8
Yubing Ma,Huiying Yan,Omar S. Abukhader,Daiqin Li,Shichang Zhang
BACKGROUND Plant-derived pesticides (PDPs) are increasingly promoted as ‘eco-friendly’ alternatives to agrochemicals because of their low vertebrate toxicity, yet their safety for non-target arthropod natural enemies is rarely tested, especially the enrichment effect via trophic transfer. RESULTS We cultured fruit flies using media supplemented with two widely applied Chinese PDPs in tea plantations, matrine or azadirachtin, under commercial concentration, which were fed to newly emerged spiderlings of wolf spider Pardosa laura (Araneae: Lycosidae) throughout their entire life cycle. We examined the effect of these two PDPs on their survival, developmental parameters and reproduction. The results showed that developmental traits remained unaffected, but both PDPs markedly suppressed male mating success and female fecundity. Histological examination of paraffin sections revealed markedly impaired ovarian maturation. Microbiome profiling indicated that pesticide exposure disrupted ovarian microbial communities, with azadirachtin exerting the strongest effect, whereas gut and testicular communities remained largely unchanged. Transcriptomic analysis of ovaries showed significant enrichment of pathways related to ovarian development. Ten representative differentially expressed genes (DEGs) within these pathways were selected and validated by RT-qPCR. CONCLUSION PDPs may not compromise the development of spiders in the first generation, yet they can severely affect reproduction of the spiders, thereby precipitating substantial declines in population size of future generations. This result challenges the conventional wisdom of botanical pesticides, inspiring re-consideration of their rational use in integrated pest management. © 2025 Society of Chemical Industry.
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高影响因子
Acta Biomaterialia
·
2025
·
IF 9.6
Yuanqi Chen,Kezheng Lei,Yinxi Li,Zhixiang Mu,Tengda Chu,Jiajun Hu,Bairui Zeng,Yi Wang,Jianliang Shen,Xiaojun Cai,Tianpeng Shi,Hui Deng
Oral mucosal wounds are more prone to inflammation due to direct exposure to various microorganisms. This can result in pain, delayed healing, and other complications, affecting patients' daily activities such as eating and speaking. Consequently, the overall quality of life for patients is significantly reduced. To address these challenges, we developed a multifunctional therapeutic nanoplatform, DATS@Arg-EA-SA, through the self-assembly of guanidinated dendritic peptides (Arg-EA-SA) that encapsulate diallyl trisulfide (DATS), a hydrogen sulfide (H 2 S) donor. The guanidine-rich surface of DATS@Arg-EA-SA efficiently neutralizes reactive oxygen species (ROS) in the ulcer microenvironment, generating nitric oxide (NO), which acts as the primary antimicrobial agent by disrupting bacterial membranes. Concurrently, the presence of glutathione triggers the release of H 2 S from DATS, providing supplementary antibacterial support. DATS@Arg-EA-SA effectively kills all bacteria, achieving results comparable to those of penicillin, a classical antibiotic. Moreover, it demonstrates superior sterilization efficacy against drug-resistant bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA), significantly outperforming penicillin. Following the initial antimicrobial phase, the nanoplatform transitions into an anti-inflammatory stage. H 2 S, in synergy with NO, facilitates the conversion of M1 macrophages to M2 macrophages, thereby reducing the expression of inflammatory factors. Importantly, the combination of H 2 S and NO provides effective analgesia by downregulating the expression of TRPV1 and TRPV4, thus restoring normal dietary behaviors and improving the overall quality of life. This system ultimately promotes collagen fiber deposition and accelerates the re-epithelialization of the ulcer wound, positioning DATS@Arg-EA-SA as a promising gas-delivery nanoplatform for rapid wound repair in the clinical treatment. Statement of Significance Oral mucosal wounds are highly susceptible to microbial infections, leading to inflammation, pain, delayed healing, and a significant decline in quality of life. We developed a multifunctional therapeutic nanoplatform (DATS@Arg-EA-SA) via the self-assembly of guanidinated dendritic peptides encapsulating the H 2 S donor DATS, which exhibited antibacterial, anti-inflammatory, and analgesic properties. In the oral ulcer microenvironment, DATS@Arg-EA-SA generates substantial NO under elevated ROS levels, while glutathione triggers the controlled release of H 2 S. NO disrupts bacterial membranes as the primary antibacterial agent, with H 2 S providing synergistic antibacterial effects. Furthermore, H 2 S and NO synergistically promote the transformation of M1 to M2 macrophages, attenuating inflammation. Importantly, the combined action of H 2 S and NO alleviates pain by downregulating TRPV1 and TRPV4, supporting the restoration of normal dietary behavior and improving quality of life.
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POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2025
·
IF 6.8
Saiying Han,Ling Liu,Lilei Wang,Jin Han,Yeru Ai,Huali Wang,Kaifang Zeng,Jian Ming,Lili Deng
Prunus salicina ‘Wushan plum’ is a climacteric fruit, which rapidly ripens under the action of ethylene after harvesting, resulting in quality deterioration that seriously restricts the sustainable development of the industry. In order to examine the potential role of sodium hydrosulfide (NaHS, the donor of exogenous H 2 S) in slowing down the ripening and senescence process of plum fruit, the changes in storage quality, antioxidant capacity, endogenous signals and gene expression levels were evaluated during storage at 25 °C for twelve days. The results indicated that NaHS treatment delayed the coloration of plum fruit and maintained higher firmness, titratable acid content (TA) and marketable fruit rate. Treatment with NaHS increased the activities of catalase (CAT), superoxide dismutase (SOD), glutathione reductase (GR) and ascorbate peroxidase (APX); promoted the accumulation of total phenols (TP) and ascorbic acid (AsA), and inhibited the increase in reactive oxygen species (ROS), malondialdehyde (MDA) and lipoxygenase (LOX) activity, which in turn alleviated oxidative damage. H 2 S treatment down-regulated the expression of PsACO1 and PsACS1 and inhibited the production of ethylene; up-regulated the expression of PsSiR , PsSAT , PsOASTL, and PsLCD , which in turn elevated the activities of sulfite reductase (SiR), serine acetyltransferase (SAT), O-acetylserine cleavage lyase (OASTL), and L-cysteine desulfurylase (LCD), and facilitated the accumulation of the endogenous H 2 S content; up-regulated the expression of L-Arginine synthesis-related genes and PsNOA , which increased the content of L-Arginine as well as the activity of nitric oxide synthase (NOS) and facilitated the synthesis of nitric oxide (NO). The above results indicated that NaHS could improve the antioxidant system, endogenous H 2 S, ethylene, and NO metabolism of plum, thus maintaining the storage quality of the fruit.
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CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Xiaochen Li,Ying Peng,Fengfan Zhang,Zihao Yang,Zhaoxia Dong
Surfaces with uniform and stable superwetting behavior have enormous application prospects. In particular, an air-water/oil amphibious superhydrophilic-superhydrophobic surface is advantageous in oil-water separation and oil-repellent materials. However, existing methods to create this property require either water pretreatment or time-consuming stimulation process, which makes instant oil-water identification impossible. Here, inspired by Namib desert beetle, we propose a strategy to construct layers differing in surface free energies to achieve surfaces that are simultaneously superhydrophilic-superoleophobic. Rough microcrystalline cellulose particles were modified by 2,2,6,6-tetramethyl-1-piperidinyloxy and perfluorooctanoic acid to successively construct high- and low-surface free energy layers. Surfaces prepared by simple spraying of these particles display excellent and stable superhydrophilicity-superoleophobicity under the amphibious conditions of air and water/oil, as well as excellent temperature and abrasion resistance. Pressed cotton membranes treated with these particles can effectively separate oil-water mixtures and oil-in-water emulsions without any pretreatment, even when the oil phase is highly viscous. Moreover, cotton gloves coated with these particles have superior water permeability and oil repellency without losing breathability. These results suggest a new approach towards oil-water separation and oil-repellent fabrics.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Zixun Fang,Yao Zhou,Yang Yang,Yidong Hou,Can Yang,Jinshui Zhang
Artificial Z-scheme photocatalytic systems, inspired by natural photosynthesis, have been widely employed for pollutant removal. In this study, we fabricated a ternary Z-scheme Bi 2 O 3 /Bi/porous carbon nitride (PCN) heterojunction with an intimately coupled interface through a simple EG-assisted solvothermal approach to improving photocatalytic performance of NO oxidation. The in-situ generated metallic Bi acts as an electron mediator, effectively accelerating the separation and transfer of photoexcited carriers. The unique Z-scheme charge transfer mechanism provides the strong redox abilities and isolates the active sites for specific reactions, thus promoting photocatalytic NO oxidation activity. As a result, the optimized Bi 2 O 3 /Bi/PCN sample achieved a NO removal efficiency of 94.6%, outperforming single-component catalysts and most previously reported heterojunction-based photocatalysts. Additionally, in-situ Fourier transform infrared spectroscopy was employed to propose the NO removal mechanism, offering valuable insight into the conversion pathway. Such a heterogeneous Z-scheme photocatalytic system with a strong redox ability, high charge-separation efficiency, and long-term stability, demonstrates significantly enhanced photoactivity for pollutant removal and is expected to attract increasing interest for other photocatalytic applications.
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Foods
·
2025
·Vol. 14
·期 23
·4019
·
IF 5.1
Zhongbin Liu,Fengkui Xiong,Guangzhong Hu,Hongwei Xiao,Jia Zheng
Newly brewed Baijiu often contains harmful substances such as mercaptan and methanol, which are spicy and harmful to health. At present, this is mainly solved by long-term cellaring, but this is faced with some problems such as a long cycle, high cost, high fire hazards and so on. Therefore, based on the principle of liquid jet cavitation explosion catalyzing the heterogeneous association of Baijiu molecules, this paper first developed the physical aging process and equipment without radiation and additives. Then, based on the traditional computational fluid dynamics (CFD) model of high-speed jet simulation, an N-CFD model which can accurately simulate the cavitation explosion catalytic process of high-speed jet of Baijiu was established by optimizing the three sub models of conservation, turbulence and VOF. Finally, the N-CFD model was used to optimize the distance between the nozzle and the reaction chamber wall of the new aging equipment. Through the 15 min aging experiment on 100 L Baijiu, the methanol concentration of Baijiu decreased by 68.14 ± 2.25%, and the concentration of ethyl acetate, ethyl lactate and ethyl palmitate increased from 6.105 ± 0.014, 3.498 ± 0.015 mg/L and 0.621 ± 0.010 mg/L to 6.332 ± 0.016, 4.868 ± 0.012 mg/L and 0.681 ± 0.008 mg/L. The results show that the aging technology equipment can adjust the self-coupling characteristics and dynamic characteristics of various molecules in Baijiu through high-speed jet, and catalyze the alternating phase transition and association of various molecules. Finally, the goal of high-efficiency and healthy aging Baijiu without additives was achieved, which helps the rapid and healthy development of the Baijiu brewing industry.
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Evidence-based Complementary and Alternative Medicine
·
2020
·
IF 1.813
Jingtian Qu,Fang Liu,Xuezhu Zhang,Jialong Wang
Oroxylin A, a flavonoid, is naturally produced in many medicinal plants. Our previous study identified it as a phytoestrogen. Based on this, the present study investigated its vasoconstriction reducing effects and whether the action was mediated by the estrogen receptor (ER) signal pathway. Long-term in vitro treatment with oroxylin A reduced Ach-induced vasorelaxation and NE-mediated or KCl-mediated contractile responses in rat aortic rings. These effects were interfered by an ER inhibitor ICI 182,780. Rat cardiac microvascular endothelial cells (CMECs) and aortic vascular smooth muscle cells (VSMCs) were used to study the possible underlying mechanisms. Oroxylin A activated the ER signal pathway. In CMECs, it increased NO production and eNOS protein expression. In VSMCs, it promoted NO production and iNOS protein expression. These effects were also inhibited by ICI 182,780. Besides, oroxylin A stimulated ERα and ERβ protein expression in CMECs and VSMCs. All these findings suggest that the ER signal pathway takes part in the vasoconstriction reducing effects of oroxylin A.
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高影响因子
MOLECULES
·
2026
·Vol. 31
·期 16
·2775
·
IF 5.1
Binyu Wang,Cong Feng,Huan Liu
To clarify the role of metal dopants in low-temperature NH3-SCR of NO, FeMnTiOxcatalysts were synthesized by coprecipitation and separately modified with Ce, Co, or W. The catalysts were evaluated for NO conversion, separate O2/H2O switching response and dry-feed time-on-stream stability and characterized by XRD, SEM, N2adsorption–desorption, XPS, H2-TPR and NH3-TPD. Ce doping at Ce/Mn = 0.3 suppressed TiO2crystallization, increased the BET surface area from 136 to 231 m2g−1and the pore volume from 0.19 to 0.58 cm3g−1, raised the Mn4+/Mn3+ratio from 0.70 to 1.25, and increased the medium-strong-acid relative peak area from 555.4 to 1293.2 a.u. FeMnCe0.3TiOxmaintained at least 90% NO conversion from 140 to 360 °C, gave 75% conversion at 400 °C, and averaged 97.4% during a 40 h dry-feed test at 350 °C. The results show that the superior Ce-modified catalyst arises from the combined regulation of texture, surface redox balance and acidity.
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LANGMUIR
·
2025
·
IF 3.9
Mi Liu,Weidan Zhao,Denghao Li,Dingyu Cui,Jiali Liu,Qingao Chen,Yan Zhou,Li Jiang,Huaibin Zhou
Infected wound healing remains a significant clinical challenge due to bacterial resistance and excessive inflammation. Herein, a multifunctional hydrogel dressing (Nb2C-Arg/Gel) is developed that integrates two-dimensional Nb2C nanosheets (photothermal agent) and arginine [nitric oxide (NO) donor] into a calcium ion cross-linked sodium alginate matrix. The hydrogel has a relatively high swelling capacity and good ability to scavenge reactive oxygen species (ROS), which are beneficial for absorbing wound exudate and reducing the inflammatory response of wounds. Under irradiation with a low-power NIR-II laser (1064 nm, 1 W cm–2), Nb2C-Arg/Gel achieves rapid photothermal heating (48.6 °C in 1 min), while thermally enhances arginine decomposition-triggered on-demand NO release. This synergistic mechanism provides superior antimicrobial efficacy against Staphylococcus aureus (97.65%) and methicillin-resistant S. aureus (90.05%). In vivo studies on MRSA-infected murine wounds demonstrate that the residual area on day 10 was 2.9%, which accelerated healing compared to that of the control group (17.8%), accompanied by reduced inflammation and enhanced angiogenesis. The excellent biocompatibility of hydrogel is validated by low hemolysis (<5%) and promoted fibroblast proliferation (125% cell viability). Combining with photothermal, NO-mediated antibacterial action, and ROS scavenging to alleviate oxidative stress, this antibiotic-free hydrogel dressing has great potential for clinical application for the treatment of refractory-infected wounds.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Youzhou He,Shuang Luo,Yuwei Tan,Mingzuo Chen,Haibo Zhou,Jianning Yu,Linjiang Pu,Yumin Huang,Min Fu,Xingyan Liu
Novel ionic state Co passivated carbon nanodots (Co-CDs) combined with NH 2 -MIL-125 as efficient photocatalysts Co-CDs/NH 2 -MIL-125 were fabricated in a convenient process for the first time. These materials exhibited excellent photocatalytic activity in both NO purification and hydrogen production under visible light irradiation. The NO purification rate of Co-CDs/NH 2 -MIL-125 increased to 46.6%, which was 20.2% and 13.4% higher than that of NH 2 -MIL-125 and CDs/NH 2 -MIL-125, respectively. Moreover, the hydrogen production efficiency of Co-CDs/NH 2 -MIL-125 reached 2261 μmol g −1 , which was 6.86 times and 3.54 times of the values for NH 2 -MIL-125 and CDs/NH 2 -MIL-125, respectively. The corresponding properties characterized by Mott-Schottky, UCPL , and in situ DRIFTS , indicated that the introduction of Co 2+ could not only passivate the CDs to further improve physicochemical properties, but also enhance the photocatalytic activity via the photosensitization and up-conversion effect. This research provides a promising strategy that adding active metal ions passivated CDs in the catalyst platform to improve photocatalytic performance.
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