Catalysis Science & Technology
·
2016
·Vol. 6
·期 24
·8516-8524
·
IF 5.287
Lei Huang,Kaiwen Zha,Supawadee Namuangruk,Anchalee Junkaew,Xin Zhao,Hongrui Li,Liyi Shi,Dengsong Zhang
Surface engineering of TiO2 is significant in the SCR reaction and worth studying. In a previous study, we found that TiO2 nanosheets (TiO2-NS) with the (001) plane exhibited a much better SCR performance than TiO2 nanoparticles (TiO2-NP) with the (101) plane. In this work, in situ DRIFTS and DFT calculations were applied to address the promotional effect of the (001) plane of TiO2-NS in the SCR reaction. The behavior of adsorption and desorption of NOx and NH3 on the two surfaces was studied. It was found that NH3 adsorbed on both TiO2-NS and TiO2-NP was in the form of NH3(g) on the Lewis acid sites. NOx on TiO2-NP were mainly trans-(NO)2 and N2O4 which were non-reactive. Differently, NO on TiO2-NS was mainly in the form of NO2 which was probably due to the high energy and abundant active oxygen species of the (001) facet. The formed NO2 could trigger the subsequent ‘fast SCR’ reaction thereafter promoting the activity. Therefore, TiO2-NS with more (001) facets had better SCR activity than TiO2-NP with the exposed (101) facet.
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Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Wang Shuainan,Sheng Hongliang,Zhao Xiaoben,He Tao,Huang Yajun,He Song
The present investigation involved the preparation of N-doped high-specific surface porous activated carbon from lignin through hydrothermal carbonization, polymer premixing, and KOH activation. We looked at how the characteristics of lignin-based activated carbon were affected by the addition of polypyrrole and the alkali ratio. The addition of polymer polypyrrole as an N dopant during the activation process with KOH resulted in the N-doped biomass-based activated carbon with a greater pore size range, specific surface area, and pore volume, while also further encouraging the pore creation. Under the optimal preparation conditions, specifically hydrothermal treatment at 473 K and activation at 1073 K for 1 h, with a mass ratio of activator to carbon precursor of 4:1, the resulting activated carbon exhibited the highest BET surface area of 3415 m 2 /g and a total pore volume of 2.81 cm 3 /g. The various characteristics of activated carbon are examined using N 2 adsorption/desorption, scanning electron microscopy (SEM), elemental analysis (EA), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). Comparing this sample to other adsorbents, it was found that the material had a greater capacity for adsorbing gaseous benzene and NO. In static adsorption tests, the saturated adsorption of gaseous benzene reached 3338.75 and 2297.69 mg/g at 273 and 298 K, respectively, while the adsorption of NO reached 560.76 and 226.99 mg/g. Adsorption isotherms were used to analyze the experimental results, which were then fitted, examined, and assessed to look into the adsorption mechanism. The outcomes demonstrated the good adsorption performance of this sample as well as its promising and useful application potential in the removal of gaseous benzene and NO. Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiahe Zhai,Hui Wang,Abdelkader Labidi,Long Zeng,Yu Huang,Chuanyi Wang
Removing low-concentration NO in the air by means of photocatalytic technology is a promising approach. Herein, our work pins down the mechanism of cobalt metal doping within the lattice of Bi 4 Ti 3 O 12 (BTO) for the photocatalytic NO conversion. As a result, the Co-BTO exhibits a NO conversion efficiency of 58.3 %, which is substantially higher than that of BTO (30 %). More interestingly, the Co-BTO also shows a lower production of intermediate NO 2 than that of the BTO. These findings demonstrate that within Co-BTO, both Co²⁺ and Co³ ⁺ coexist. The redox cycle between these two cobalt species engenders active sites possessing strong reducing capabilities for O₂ which can be adsorbed and activated at the Co sites, thereby generating superoxide radicals (•O₂⁻). Furthermore, the doping of a certain portion of cobalt broadened light absorption and enhanced the separation efficiency of photogenerated carriers, further facilitating the activation of O₂. Lastly, electron spin resonance (ESR) and in-situ diffuse reflective infrared Fourier transform spectroscopy (in-situ DRIFTS) were respectively utilized to further clarify the active species involved in the photocatalytic oxidation of NO and its adsorption and conversion pathways from a mechanistic standpoint. Overall, this work represents a novel endeavor for the advancement of visible-light-driven photocatalysts usage for environmental remediation against NO pollution.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Changjiang Pan,Changpeng Zuo,Jie Chen,Qiuyang Zhang,Linghong Deng,Yang Liu,Pingyun Ding
Although significant progress in developing biodegradable magnesium alloy materials in cardiovascular stents has been achieved recently, they still face challenges such as rapid in vivo corrosion degradation, inferior blood compatibility, and limited re-endothelialization after the implantation. Hydrogel coating that can catalyze the liberation of gas signal molecules offers a good solution to alleviate the corrosion rate and enhance the biocompatibility of magnesium and its alloys. In this study, based on alkaline heat treatment and construction of polydopamine coating on the surface of magnesium alloy, sodium alginate/carboxymethyl chitosan (SA/CMCS) gel was simultaneously covalently grafted onto the surface to build a natural polymer hydrogel coating, and selenocystamine (SeCA) and CO release molecules (CORM-401) were respectively immobilized on the surface of the hydrogel coating to ameliorate the anticoagulant performance and accelerate endothelial cells (ECs) growth by catalyzing the release of endogenous gas signal molecules (NO or CO). The findings verified that the as-prepared hydrogel coating can catalyze the liberation of CO or NO and significantly improve the corrosion resistance of magnesium alloy. At the same time, owing to the excellent hydrophilicity of the hydrogel coating, the good anticoagulant property of sodium alginate, and the ability of CMCS to promote the ECs growth, the modified magnesium alloy could significantly improve the albumin adsorption while preventing the adsorption of fibrinogen, hence significantly augmenting the anticoagulant properties and promoting the ECs growth. Under the catalytic release of NO or CO, the released gas molecules further enhanced hemocompatibility and promoted endothelial cell (EC) growth and the expression of vascular endothelial growth factor (VEGF) and NO of ECs. Therefore, the bioactive coatings that can catalyze the release of NO or CO have potential applications in constructing surface bioactive coatings for magnesium alloy materials used for intravascular stents.
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CHEMISTRY & BIODIVERSITY
·
2021
·Vol. 18
·期 7
·e2100229
·
IF 2.408
Wenjuan Ding,Fangfang Wang,Qingwen Li,Yaxin Xue,Zhitong Dong,Danmei Tian,Mei Chen,Youwei Zhang,Kui Hong,Jinshan Tang
Marine derived fungus has gained increasing ground in the discovery of novel lead compounds with potent biological activities including anti-inflammation. Here, we first report the characterization of one new sorbicillinoid ( 1 ) and fourteen known compounds ( 2 – 15 ) from the ethyl acetate (AcOEt) extract of a cultured mangrove derived fungus Penicillium sp. DM815 by UV, IR, HR ESI-Q-TOF MS, and NMR spectra. We then evaluated the anti-inflammatory effects of eleven sorbicillinoids ( 1 – 11 ) using cultured macrophage RAW264.7 cells. The results show that compound 9 , and to a lesser degree compound 5 , significantly inhibited the Gram-negative bacteria lipopolysaccharide (LPS)-induced upregulation of the inducible nitric oxide synthase (iNOS). Consistently, compounds 5 and 9 significantly reduced the level of nitric oxide (NO), the product of iNOS, induced by LPS. We further show that these two compounds dose-dependently inhibited LPS-triggered iNOS expression and NO production, but had no effect on proliferation of RAW264.7 cells in the presence of LPS. In conclusion, our study identifies novel and known sorbicillinoids as potent anti-inflammatory agents, holding the promise of developing novel anti-inflammation treatment in the future.
研究领域:
药理学
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微生物学
·
化学
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Horticulturae
·
2026
·Vol. 12
·期 4
·430
·
IF 3.4
Hongli Li,Dandan Huang,Chengkun Li
The storage quality of fresh-cut peach fruit is compromised by weight loss and chromatic aberration. In this experiment, taurine at 30 mg L−1was applied to fresh-cut peaches to evaluate its effect on storage quality. Changes in weight loss, chromatic aberration, antioxidant system, endogenous nitric oxide (NO) metabolism, endogenous hydrogen sulfide (H2S) metabolism, and phenylpropanoid metabolism were studied. The results indicated that 30 mg L−1taurine effectively improved the ability to scavenge ROS, including •OH, O2•−, MDA, and H2O2, by inhibiting the decrease in the activities of SOD and CAT, enhancing POD activity, reducing PPO activity, and maintaining the AsA-GSH cycle. Moreover, taurine treatment increased the activities of 4CL and PAL and retarded the decrease in the activities of SKDH and C4H, thereby improving the accumulation of total phenols, flavonoids, and lignin. These findings showed that taurine mitigated oxidative damage in fresh-cut peaches by enhancing the antioxidant defense system. Exogenous taurine consistently enhanced NOS-like activity while decreasing NR activity in the early storage phase, and elevated the contents of L-Arginine, nitrite, and endogenous NO. Taurine treatment up-regulated the activities of SAT, L-CD, and OAS-TL, thus promoting endogenous H2S content in fresh-cut peaches. Taurine alleviated weight loss and chromatic aberration in fresh-cut peaches during storage by enhancing the antioxidant system and modulating NO, H2S and phenylpropanoid metabolism.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Yinming Fan,Yuanzhen Li,Siqi Jiang,Yanping Zhang,Yinian Zhu,Shengpeng Mo,Lei Liao,Yanan Zhang,Xiaobin Zhou,Zongqiang Zhu
Volatile organic pollutants (VOCs) can serve as an alternative to ammonia for NO reduction, thereby enabling the simultaneous removal of VOCs and NO. In this study, different morphologies of MnO x /CoO x catalysts derived from MOFs were controllably synthesized under various hydrothermal synthesis conditions for the simultaneous removal of 1,2-propanediol and NO. Among the various samples, sample A, characterized by its rod-like structure, demonstrated superior catalytic activity. It achieved simultaneous photothermal coupling for the degradation of 1,2-propanediol and NO under UV irradiation at 240 °C, with conversion rates reaching 52 % and 67 %, respectively. The morphology of the catalysts significantly influences their catalytic performance. The incorporation of Mn increased the structural disorder of the material, thereby reducing the coordination order of Co. This significant change in the coordination environment modulates the intrinsic catalytic activity of the samples, leading to distinct catalytic properties. Furthermore, the catalytic reaction mechanisms were clarified utilizing in-situ DRIFTS combined with calculations based on Density Functional Theory. Sample A, featuring abundant unsaturated cobalt and manganese defects within its distinctive coordination configuration, greatly promoted the conversion of 1,2-propanediol into crucial intermediate species. This study presents a novel approach for the synergistic removal of VOCs and NO x .
研究领域:
催化化学
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材料科学
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环境化学
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纳米材料
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物理化学
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JOURNAL OF CONTROLLED RELEASE
·
2026
·
IF 11.5
Ying-Tong Ye,Xi Xiao,Hong-Ying Xia,Jie Li,Zhen-Zhen Gong,Ai-Zheng Chen,Shi-Bin Wang,Ranjith Kumar Kankala
Despite the success of various intelligent materials in meeting the multiple needs of diabetic ulcer wounds (DUW) healing, it is often challenging to consider the entire healing process, from early antibacterial and anti-inflammatory effects to late matrix remodeling and angiogenesis characteristics, by releasing multiple active ingredients in stages and on demand. Herein, we designed a versatile bilayer (GCM/Clean-GDA/Cure) hydrogel dressing with light-controlled, spatiotemporal sequential release of MXene nanosheets (MX NSs)/nitric oxide (NO) gas for the healing of methicillin-resistant Staphylococcus aureus (MRSA) biofilm-infected DUWs. Initially, the lower GCM layer comprised carboxymethyl chitosan-gelatin and cerium oxide (CeO 2 )-decorated MX NSs (CO-MX), and the upper GDA layer consisted of dopamine-modified methacrylated gelatin (GelMA-DA) with L-arginine (L-Arg) as a precursor. Under NIR irradiation, the GCM hydrogel releases photothermal-induced CO-MX NSs as self-regenerating antioxidants, exhibiting 98.25 % inhibition against MRSA and 96.37 % inhibition against Pneumonia aeruginosa. The abundant oxygen vacancies and reversible Ce(III)/Ce(IV) redox pairs of the released Ce species from CO-MX NSs could attenuate inflammation and promote early macrophage polarization. The light-assisted gel–sol thermal transition of the lower GCM layer further exposes the upper GDA layer, providing a conducive microenvironment for angiogenesis and tissue remodeling. L-Arg in the GDA layer could enable light-controlled in situ release of NO gas activated by elevated reactive oxygen species (ROS), reaching 7.71 μM within 10 min of exposure to NIR light. Thus, the NIR-assisted bilayer treatment group achieved a 97.74 % wound closure rate. Finally, the transcriptomic analysis validated the activation of regenerative pathways and suppression of excessive inflammatory and metabolic stress signals. Together, the photo-controlled sequential release of MX NSs and NO gas from the bilayer could expand the application of light-responsive nanomaterials, providing an innovative therapeutic modality for in situ treatment of diabetic wounds infected by highly drug-resistant MRSA biofilms.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Youzhou He,Shuang Luo,Xueli Hu,Yaling Cheng,Yumin Huang,Shengming Chen,Min Fu,Yiming Jia,Xingyan Liu
The bifunctional photocatalyst CDs@NH 2 -MIL-125(Ti), carbon nanodots (CDs) encapsulated in NH 2 -MIL-125(Ti), was constructed in situ by a simple and convenient low-temperature calcination approach, which exhibited great capacity in NO removal (at air level) and H 2 evolution simultaneously under visible-light irradiation. The NO removal rate of CDs@NH 2 -MIL-125(Ti) (10 mM) reached 53%, which was 28.4% higher than pristine NH 2 -MIL-125(Ti). Moreover, the H 2 production rate was 5820.95 μmol g −1 , which was 5.34 times higher than that of original NH 2 -MIL-125(Ti). The corresponding optical and electrical performances of CDs@NH 2 -MIL-125(Ti) characterized by UV–Vis, UCPL, ESR, and in situ DRIFTS , etc. indicated that the encapsulated CDs uniformly dispersed in the pores of NH 2 -MIL-125(Ti) could improve the visible light utilization via the up-conversion effect and photosensitization, and serve as an electron-receiver to significantly prolong the lifetime of the photogenerated charge carriers, thus enhancing the photocatalytic performance. The results revealed that fabricating CDs with metal-organic frameworks (MOFs) could be an available strategy for us to boost the photocatalytic NO elimination and H 2 evolution activity simultaneously.
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Molecular Catalysis
·
2023
·
IF 4.6
Jing Li,Suxia Ma,Ke Ren,Nuo Xu
SSZ-13 zeolite was synthesized from fly ash using a combined alkali fusion hydrothermal method. The optimal synthesis parameters are as follows: NaOH/FA=1.4, SiO 2 /Al 2 O 3 =50, H 2 O/SiO 2 =1800, TMAda-OH/Al 2 O 3 =7, the amount of SSZ-13-seed=10%, and crystallization time and temperature were 160 °C and 40 h. Based on this, a series of fly ash-based Fe-SSZ-13 catalysts were prepared using three different methods and tested in catalytic oxidation with H 2 O 2 for NO removal. The experiment results showed that the NO removal efficiency catalyzed by Fe-SSZ-13-SSIE, Fe-SSZ-13-LIE and Fe-SSZ-13-IM were 78%, 87% and 84%, respectively. ESR was used to detect hydroxyl radicals, UV-vis, XPS and H 2 -TPR were applied to test the composition, state and distribution of iron species, while NH 3 -TPD and Py-FTIR were performed to analyze the intensity and type of acidic sites, and finally to determine the relationship between catalyst structure, active species and catalytic performance in combination with NO removal experiments. The catalytic oxidation mechanism analysis revealed that the excellent catalytic performance can be attributed to the dual function of strong Brønsted acidity on the surface and isolated Fe 3+ with high dispersion, which can rapidly decompose H 2 O 2 into ·OH and efficiently achieve NO oxidation. In conclusion, the preparation of fly ash catalysts has great potential for achieving the dual function of waste utilization and pollutant removal.
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Food Science & Nutrition
·
2019
·Vol. 7
·期 3
·949-958
·
IF 1.747
Yaqiong Zhang,Ming Li,Hang Gao,Bo Wang,Xu Tongcheng,Boyan Gao,Liangli (Lucy) Yu
In this study, a new red sorghum variety (Ji Liang No. 1) was investigated for its triacylglycerol (TAG) and fatty acid profiles, carotenoid and tocopherol compositions, total phenolic, total flavonoid and phenolic acid contents, and antioxidant and anti-inflammatory properties. A total of 17 TAGs were identified in the red sorghum oil. Linoleic and oleic acids were the primary fatty acids, contributing more than 80% of the total fatty acids. β-Carotene was the primary carotenoid at a level of 26.14 μg/g. α-, γ-, and δ-tocopherols were at levels of 0.19, 4.08, and 0.10 μg/g, respectively. Moreover, acetone–water (60:40, v/v) extract of the red sorghum exhibited the greatest total phenolic content of 2.77 mg GAE/g and total flavonoid content of 5.44 mg RE/g. The extract had scavenging capacities against DPPH, ABTS + , and peroxyl radicals and suppressed LPS stimulated IL-1β, IL-6, and COX-2 mRNA expressions in a dose-dependent manner. Ferulic, p -coumaric, isoferulic, and p -hydroxybenzoic acids were found in the red sorghum, with ferulic acid as the predominant phenolic acid and mostly in an insoluble bound form. These data indicated a potential utilization of the red sorghum in health-promoting functional food or supplemental products.
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APPLIED CATALYSIS A-GENERAL
·
2018
·
IF 4.521
Xiaoqiang Wang,Yue Liu,Qingji Ying,Weiyuan Yao,Zhongbiao Wu
In this paper, a series of Nb modified Cu-Ce-Ti mixed oxides (Nb y CCT) were synthesized using wetness impregnation method for the selective catalytic reduction of NO with ammonia (NH 3 -SCR). The activity tests indicated that Nb y CCT catalysts had shown superior SCR performances. Among which, Nb 0.05 CCT catalyst exhibited a NO conversion of more than 90% within a broad operation temperature window (180–360 °C) under the GHSV of 40,000 h −1 . After that, corresponding characterizations were performed to correlate the physical structures and surface properties to catalytic performances. These results revealed that the strong interactions among the active phases induced by Nb addition could not only enhance the redox property of the catalysts but also inhibit the over-oxidation of NH 3 , which would be beneficial to SCR performance within a wide temperature range and good reaction selectivity. Furthermore, DRIFTS results suggested that the doping of Nb could promote the formation of NO 2 , thereby enhancing the “fast” SCR reaction process (Langmuir-Hinshelwood reaction pathway). Moreover, the Nb 0.05 CCT catalyst showed a better sulfur tolerance compared to Nb free catalyst that over 85% NO conversion could be retained after 12 h SCR reaction in the presence of SO 2 and H 2 O.
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危险品化学品经营许可证（带存储）