JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Youzhou He,Mingzuo Chen,Yao Jiang,Lei Tang,Jianning Yu,Ya Chen,Min Fu,Xuemei Tan,Jiajia Jing,Guizhi Zhang,Xingyan Liu
The modification of graphite carbonitride (g-C 3 N 4 ) is beneficial to increase its specific surface area and high quantum efficiency, thus improving its activity. Herein, the Yb 2 O 3 /g-C 3 N 4 composites were adjusted through dual regulation synergistically (nanostructure design of g-C 3 N 4 and addition of lanthanide oxides Yb 2 O 3 ) to improve the photocatalytic performance of hydrogen production and NO removal simultaneously. The as-prepared 1% Yb 2 O 3 /tubular g-C 3 N 4 could efficiently promote the photocatalytic hydrogen evolution (4071.763 μmol·g −1 ·h −1 ) and NO removal performance (54.20%), which was approximately 8.85 times and 32.01% higher respectively than that of bulk g-C 3 N 4 prepared by melamine (g-C 3 N 4 -M). The formation process of·O 2 - and·OH radicals and the oxidation process of NO had been systematically studied through ESR and in-situ DRIFTS , which proved that the coupling of tubular g-C 3 N 4 with Yb 2 O 3 had a positive effect. This work provided a novel strategy for dual regulation (adjust morphology and metal oxide introduction) synergistically design of bifunctional photocatalysts to enhance H 2 production and NO removal simultaneously.
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ChemCatChem
·
2021
·Vol. 13
·期 7
·1834-1846
·
IF 5.686
Ruihuan Jiang,Shaomian Liu,Liang Li,Yongjun Ji,Huifang Li,Xiangfeng Guo,Lihua Jia,Ziyi Zhong,Fabing Su
Graphical Single Ir atoms : In the CO+NO reaction, the catalyst with single-sited Ir atoms (0.28 wt %) anchored on a mesoporous WO 3 (Ir 1 /mesoporous-WO 3 ) showed much higher NO conversion and N 2 selectivity under oxygen-rich conditions than the catalysts supported with Ir nanoparticles on the same catalyst support (Ir NPs/mesoporous-WO 3 ) and on a non-mesoporous WO 3 (Ir/non-mesoporous-WO 3 ). Under oxygen-rich conditions, achieving a selective and efficient reduction of NO by CO is always challenging. Here, we report the synthesis of the catalyst consisting of single Ir atoms anchored on mesoporous WO 3 (denoted as Ir 1 /m-WO 3 ) using a facile template method followed by wet impregnation. X-ray diffraction and transmission electron microscope studies indicated that the Ir atoms were distributed uniformly on the internal surface of m-WO 3 . When tested for the reduction of NO by CO, the Ir 1 /m-WO 3 catalyst with a low Ir loading of 0.28 wt % exhibited excellent catalytic performance in the presence of 2 vol % O 2 (volume ratio of CO to O 2 being 1 : 10), achieving a NO conversion of 73 % and N 2 selectivity of 100 % at 350 °C. In particular, its turnover frequency (TOF) value reached 0.30 s −1 at 200 °C, which is six times higher than that of the catalyst with Ir nanoparticles supported on mesoporous WO 3 (0.05 s −1 ). The superior catalytic performance of Ir 1 /m-WO 3 is attributed to the formation of the isolated Ir atoms and the more newly generated Ir-WO 3 interfaces that can promote the adsorption and activation of NO, and the presence of accessible mesopores in m-WO 3 that facilitates the mass transfer of NO and CO. This study brings a new fundamental understanding of active sites in Ir-based catalysts for the CO+NO reaction and provides a new way to the design and synthesis of single-atom catalysts, especially precious metal catalysts for emissions control.
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MOLECULAR PHARMACEUTICS
·
2021
·
IF 4.939
Zhiting Sun,Xiaoxiao Wang,Jing Liu,Zhihong Wang,Weiwei Wang,Deling Kong,Xigang Leng
Photodynamic therapy (PDT) is promising for clinical cancer therapy; however, the efficacy was limited as an individual treatment regimen. Here, an approach synergistically combining PDT and nitric oxide (NO) gas therapy along with destruction of the tumor extracellular matrix (ECM) was presented to eliminate cancer. Specifically, the NO donor l-arginine (l-Arg) and the photosensitizer indocyanine green (ICG) were co-encapsulated in poly(lactic-glycolic acid) (PLGA) nanoparticles and then loaded into the poly(ε-caprolactone)-poly(ethylene glycol)-poly(ε-caprolactone) (PCL–PEG–PCL) hydrogel to develop an injectable, thermosensitive dual drug delivery system (PLGA@ICG@l-Arg/Gel). Significantly, reactive oxygen species (ROS) produced by PLGA@ICG@l-Arg/Gel under near-infrared (NIR) light irradiation could not only result in the apoptosis of cancer cells but also oxidize l-Arg to generate NO, which could suppress the proliferation of cancer cells. Moreover, ROS could further oxidize NO to generate peroxynitrite anions (ONOO–). ONOO– could activate matrix metalloproteinases (MMPs), which notably degraded collagen in ECM so as to damage the tumor microenvironment. PLGA@ICG@l-Arg/Gel significantly increased the antitumor efficacy against highly malignant 4T1 tumors in mice. Taken together, PLGA@ICG@l-Arg/Gel is a multifunctional platform that provides a novel strategy for cancer treatment with cascade amplification of the ROS oxidation effect, which holds great potential in clinical translation.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Jing Hu,Haiqiang Wang,Fan Dong,Zhongbiao Wu
Photothermal effect was for the first time utilized to capture the energy from infrared light and to promote the photocatalytic oxidation activity of NO by a simply mechanical mixing of traditional photocatalysts and core-shell structured Fe 3 O 4 @SiO 2 . Fe 3 O 4 @SiO 2 absorbed the infrared light, transferred it into thermal energy based on photothermal effect, which then accelerated the NO photocatalytic activity of traditional photocatalysts. This promotion effect led by the addition of Fe 3 O 4 @SiO 2 was confirmed by several classical photocatalysts such as TiO 2 , g-C 3 N 4 , BiOI and CeO 2 . To quantitatively characterize the photothermal effect, thermo images were taken with a thermo imager to obtain the average temperature rise of samples under the illumination of simulated solar light. Specially, P25/Fe 3 O 4 @SiO 2 was studied in depth for illustration of the promotion mechanism. Experimental results showed that with the contribution of SiO 2 shell, the photocorrosion of Fe 3 O 4 didn’t occur during photocatalytic oxidation process and the photothermal effect of Fe 3 O 4 was maintained. The quantity of Fe 3 O 4 @SiO 2 was a vital factor for promotion of photocatalytic activity and the optimum mass ratio of P25 and Fe 3 O 4 @SiO 2 was 3–1. After 120 min of illumination, the temperature of optimum P25/Fe 3 O 4 @SiO 2 rose to 57.4 °C from 25 °C and its NO conversion capability showed an enhancement of 38.9% with the comparison to pure P25. The experimental results confirmed that the rise of temperature was attributed to the photothermal effect and its contribution was the same as the directly heating of photocatalysts. Furthermore, the enhancement of NO conversion capability around 30–40% was observed for the Fe 3 O 4 @SiO 2 mixed anatase TiO 2 , g-C 3 N 4 , ZnO, BiOI and CeO 2 . In sum, we developed a new strategy for utilization of NIR light of solar energy to facilitate the photocatalytic reactions.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiangyu Huang,Zucheng Shen,Qi Deng,Chengfei Zhao,Xiaofeng Cai,Shaoteng Huang,Mingbo Zhang,Yanzhuo Lv,Dongliang Yang,Junyang Zhuang,Ning Li
Diabetic foot ulcers (DFU) infections have been a major setback in wound healing, yet there is no effective therapeutic intervention. Here we report a nano-multidrug co-delivery system based on arginine-terminal butterfly-shaped peptide dendrimers (C&D@Z) that effectively kill bacteria and promote wound healing. Firstly, upon the near-infrared light irradiation, reactive oxygen species (ROS) was generated from the loaded photosensitizers, and then mediated bacteria killing. Next, the excessive ROS reacted with the designed butterfly-shaped dendrimers to generate sustained and abundant nitric oxide (NO), which exerted bactericidal action, as well as produced anti-inflammatory and angiogenesis effects. The co-delivery system, facilitated by the generation of NO, penetrated deeply into the biofilm, thereby effectively eliminating bacteria. The enhanced bactericidal and healing efficiency was investigated through biofilm penetration and wound healing experiments. Collectively, our system leveraged the highly-branched and cavity structures of the butterfly peptide dendrimer to realize the tight contact between the arginine groups and photosensitizer to achieve efficient conversion from ROS to NO, and the C&D@Z exhibited superior NO production, optimal photodynamic therapy utilization and effective penetration performance through cascade reaction between photodynamic therapy and NO therapy, may serve as a promising therapeutic approach for DFU infections.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ruijia Dai,Yongqi Zhao,Qingchun Zhai,Shaoyu Wang,Hua Li,Xingxing Chen,Jianglong Yu,Jinxiao Dou
Coal-fired power plants generate substantial quantities of hazardous fly ash and gas pollutants, presenting significant environmental challenges. This study introduces an innovative approach to simultaneously address both waste streams by converting coal fly ash (CFA) into high-performance X zeolite adsorbents. The synthesized X zeolite showed exceptional surface area and well-defined crystalline structure, as confirmed by comprehensive characterization using SEM, XRD, FT-IR, BET, Raman, and TPD analyses. The adsorption performance of the synthesized X zeolite was systematically evaluated using low-concentration (1000 ppm) flue gas components including NH 3 , NO, SO 2 , CO 2 , and C 7 H 8 across operating temperatures of 20–100 ℃. Maximum adsorption capacities at 20 ℃ reached 1.58, 0.38, 1.16, 0.71, and 0.65 mmol/g for NH 3 , NO, SO 2 , CO 2 , and C 7 H 8 respectively, with NH 3 and SO 2 showing notably higher affinities. The selective adsorption behavior stems from strong interactions between polar gas molecules and the zeolite framework under combined dispersion and electrostatic forces. In-situ DRIFTs analysis coupled with DFT calculations revealed that bridging oxygen atoms (T-O-T) within the zeolite structure serve as primary adsorption sites, facilitating electron transfer with gas molecules. These findings demonstrate the potential of CFA-derived X zeolite for efficient multi-pollutant removal from flue gases while simultaneously addressing solid waste management in coal-fired power plants.
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Catalysts
·
2018
·Vol. 8
·期 12
·642
·
IF 3.465
Yan Gao,Tao Luan,Mingyang Zhang,Wenke Zhang,Wenchen Feng
A series of Mn−Fe−Ce−Ox/γ-Al2O3nanocatalysts were synthesized with different Mn/Fe ratios for the catalytic oxidation of NO into NO2and the catalytic elimination of NOxvia fast selective catalytic reduction (SCR) reaction. The effects of Mn/Fe ratio on the physicochemical properties of the samples were analyzed by means of various techniques including N2adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), H2-temperature-programmed reduction (TPR), NH3-temperature-programmed desorption (TPD) and NO-TPD, meanwhile, their catalytic performance was also evaluated and compared. Multiple characterizations revealed that the catalytic performance was highly dependent on the phase composition. The Mn15Fe15−Ce/Al sample with the Mn/Fe molar ratio of 1.0 presented the optimal structure characteristic among all tested samples, with the largest surface area, increased active components distributions, the reduced crystallinity and diminished particle sizes. In the meantime, the ratios of Mn4+/Mnn+, Fe2+/Fen+and Ce3+/Cen+in Mn15Fe15−Ce/Al samples were improved, which could enhance the redox capacity and increase the quantity of chemisorbed oxygen and oxygen vacancy, thus facilitating NO oxidation into NO2and eventually promoting the fast SCR reaction. In accord with the structure results, the Mn15Fe15−Ce/Al sample exhibited the highest NO oxidation rate of 64.2% at 350 °C and the broadest temperature window of 75–350 °C with the NOxconversion >90%. Based on the structure–activity relationship discussion, the catalytic mechanism over the Mn−Fe−Ce ternary components supported byγ-Al2O3were proposed. Overall, it was believed that the optimization of Mn/Fe ratio in Mn−Fe−Ce/Al nanocatalyst was an extremely effective method to improve the structure–activity relationships for NO pre-oxidation and the fast SCR reaction.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2020
·Vol. 18
·期 1
·1-25
·
IF 6.518
Zhao Baohua,Wang He,Dong Wenjing,Cheng Shaowen,Li Haisheng,Tan Jianglin,Zhou Junyi,He Weifeng,Li Lanlan,Zhang Jianxiang,Luo Gaoxing,Qian Wei
Background Infectious diseases caused by multidrug-resistant (MDR) bacteria, especially MDR Gram-negative strains, have become a global public health challenge. Multifunctional nanomaterials for controlling MDR bacterial infections via eradication of planktonic bacteria and their biofilms are of great interest.Results In this study, we developed a multifunctional platform (TG-NO-B) with single NIR laser-triggered PTT and NO release for synergistic therapy against MDR Gram-negative bacteria and their biofilms. When located at the infected sites, TG-NO-B was able to selectively bind to the surfaces of Gram-negative bacterial cells and their biofilm matrix through covalent coupling between the BA groups of TG-NO-B and the bacterial LPS units, which could greatly improve the antibacterial efficiency, and reduce side damages to ambient normal tissues. Upon single NIR laser irradiation, TG-NO-B could generate hyperthermia and simultaneously release NO, which would synergistically disrupt bacterial cell membrane, further cause leakage and damage of intracellular components, and finally induce bacteria death. On one hand, the combination of NO and PTT could largely improve the antibacterial efficiency. On the other hand, the bacterial cell membrane damage could improve the permeability and sensitivity to heat, decrease the photothermal temperature and avoid damages caused by high temperature. Moreover, TG-NO-B could be effectively utilized for synergistic therapy against the in vivo infections of MDR Gram-negative bacteria and their biofilms and accelerate wound healing as well as exhibit excellent biocompatibility both in vitro and in vivo.Conclusion sOur study demonstrates that TG-NO-B can be considered as a promising alternative for treating infections caused by MDR Gram-negative bacteria and their biofilms.
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高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Shiju Yang,Xueshuang Yan,Fuzhi He,Zhuliang Chen,Kaizhu Chang,Wan Yang,Futing Xia,Jianjun Chen,Qiulin Zhang
Achieving remarkable activity in selective catalytic reduction of NO by NH3 (NH3-SCR) over CeO2-based catalysts was crucial for their industrial application but still faces a tough challenge, mainly owing to the insufficient acidity and overoxidation ability. Herein, the surface acidity and reducibility of CeO2 catalysts were finely tuned over Mn–W/CeO2 to efficiently eliminate NO and reveal the mechanistic origin of superior catalytic properties. Systematic surface and structure analyses revealed that Mn3O4 interacted with WO3 species in the possible form of Mn–O–W, which could enhance the dispersion of WO3 over the CeO2 surface. The resulting well-dispersed WO3 increased the concentration of both Brønsted acid sites and strong acid sites, effectively suppressing the generation of inactive nitrates and thus providing abundant catalytically active sites for the adsorption and activation of NH3. Importantly, the electron withdrawal from Mn by W atoms associated with the shortened Mn–O bond distance resulted in the appropriate reducibility over Mn–W/CeO2. Accordingly, the undesirable overoxidation of NH3 was weakened, thereby greatly increasing the high-temperature (250–400 °C) NH3-SCR activity. DFT calculations and detailed in situ DRIFTS analysis demonstrated that both “E–R” and “L–H” mechanisms contributed mainly to this superior performance.
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Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Ying Jiang,Guozhong Lu,Shinuo Kang,Fushan Geng,Bingwen Hu
All-solid-state batteries with ultrathin lithium metal, close to the anode-free solid-state batteries, could achieve high energy density. However, it is not trivial to plate an ultrathin lithium metal layer on a Cu current collector (Cu-CC). In situ electron paramagnetic resonance (EPR) imaging showed that the pre-plating on Cu-CC in a Li–In|Li6PS5Cl|Cu cell without pressure holding produced a lithium metal layer with a small area. However, when a Li–In|Li6PS5Cl|Cu cell was held under a considerable pressure, this cell would produce a lithium metal layer with a large area. The Cu-CC with the ultrathin lithium metal layer of a small surface could be extracted and then assembled with LiNiO2 and Li6PS5Cl to achieve better electrochemical performance compared to that of a large surface, because a small area of the lithium metal layer would lead to fewer side reactions and less consumption of lithium ions. This work suggests the importance of the control of the lithium plating and the observation of lithium plating by in situ EPR imaging.
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Food Chemistry-X
·
2026
·
IF 9.2
Chen Liu,Chenbo Wang,Mengyang Wei,Meiyi Ning,Zhiying Xu,Shengxiang Chen,Jilai Cui,Chuankui Song,Qian Tang
Leaf tenderness influences green tea quality, yet its role in flavour formation remains unclear. This study analysed green teas from Camellia sinensis cv. ‘Chuancha No. 2’ with three tenderness levels—single bud (C1B), one-bud with one-leaf (C1B1L), and one-bud with two-leaves (C1B2L)—via sensory evaluation, chemical profiling, and GC–MS analysis. C1B showed the best appearance and a chestnut-like, refreshing aroma. C1B1L featured floral notes and a mellow, umami taste, while C1B2L was stronger and more full-bodied. C1B had higher free amino acids and lower polyphenols and caffeine; C1B1L had the highest polyphenol content. Among 97 volatiles, 11 had ROAV > 1. Five common aroma compounds, namely 1-octen-3-ol, geraniol, hexanal, benzeneacetaldehyde, and 2-pentylfuran, were identified as key contributors to the aroma profile. Geraniol, most abundant in C1B1L, shaped its floral aroma. These origins are supported by established pathways, including lipid-derived oxidation products, glycoside-released geraniol, and amino-acid-derived benzeneacetaldehyde. This study clarifies how tenderness drives flavour divergence and identifies compounds supporting sensory variation in green tea.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Feiyang Xu,Ting Cui,Haidong Shen,Hongfu Liu,Jianfei Xie,Kai Yang,Yugui Tao
Multidrug-resistant (MDR) bacterial infections remain a critical public health concern worldwide, with conventional antibacterial strategies presenting limitations such as inconsistent target localization, suboptimal therapeutic efficiency, and progressive antimicrobial resistance development. Nitric oxide (NO), a bioactive molecule, exhibits potent antibacterial effects, resulting in the emergence of NO-based gas therapy as a promising and innovative therapeutic strategy. However, these therapies present the principal challenge of effective NO delivery, owing to its short half-life and limited diffusion capacity. Hence, this study aimed to develop AI‑molybdenum disulfide (L-Arg/IR780@MoS 2 ) nanoflowers (NFs) employing L-arginine (L-Arg) as an endogenous NO precursor and MoS 2 as a dual carrier for L-Arg and IR780 iodide (IR780). Following near-infrared irradiation during photodynamic therapy, generated reactive oxygen species initiated an oxidation cascade for L-Arg-to-NO conversion. The produced NO, in combination with photothermal therapy, modulated the bacterial microenvironment. This significantly altered the expression of key genes in MDR bacteria associated with nucleotide metabolism and biofilm formation, thereby effectively disrupting biofilms and suppressing bacterial growth. Furthermore, the AI-MoS 2 NFs exhibited notable ancillary therapeutic benefits, including anti-inflammatory activity, enhanced re-epithelialization, increased collagen deposition, and angiogenesis modulation, which collectively accelerated wound healing. Altogether, the findings of this study present a synergistic therapeutic strategy designed to address the dual challenges posed by bacterial biofilms and antimicrobial resistance.
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