CATALYSIS LETTERS
·
2025
·Vol. 155
·期 11
·1-16
·
IF 2.4
Yao Liang,Wang Hao,Li Shuangde,Chen Yunfa
Sulfur dioxide (SO 2 ) emissions, a major source of air pollution, can be effectively mitigated through catalytic reduction to elemental sulfur using carbon monoxide (CO). In this study, Fe loaded TiO 2 catalysts were synthesized and subsequently subjected to pre-sulfurization treatment under varied conditions. Their catalytic performance was evaluated in SO 2 reduction for thermal and dielectric barrier discharge (DBD) plasma enhanced thermal catalysis. The results showed that OFS-Fe/TiO 2 catalyst with oxygen-free sulfurization (OFS) treatment exhibited the highest catalytic activity, achieving above 90% SO 2 conversion between 250 and 550 °C under oxygen-assisted reaction (OAR), along with long-term stability under 40–60% water vapor. However, the SO 2 conversion were below 20% for Fe/TiO 2 and oxygen-assisted sulfurization OAS-Fe/TiO 2 catalysts within 250 to 400 °C. Notably, the significantly enhanced catalytic performance of the OFS-Fe/TiO 2 catalyst was probably attributed to the high dispersion of Fe over nano-TiO 2 , the lower Fe 2+ /Fe 3+ ratio, and the formation of active FeS 2 species detected by SEM-EDS, XPS and TPD techniques. Furethermore, a conversion efficiency exceeding 90% was maintained throughout 80 to 550 °C under DBD plasma reaction over POFS-Fe/TiO 2 catalyst with room-temperature DBD plasma oxygen-free sulfurization treatment, surpassing thermal catalysis performance. The significantly enhanced low-temperature activity of plasma catalysis was attributed to the lowest Fe 2+ /Fe 3+ ratio, together with the transformation of FeS 2 into FeS, generating more sulfur vacancies. In-situ DRIFTS experiments confirmed two distinct SO 2 adsorption and reduction mechanisms between Fe/TiO 2 and OFS-Fe/TiO 2 catalysts. The results demonstrate that pre-sulfurization and plasma modification serve as an effective catalytic strategy to enhance CO-mediated SO 2 reduction, offering a sustainable emission control approach through sulfur resource utilization. Graphical
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Fuels
·
2025
·Vol. 6
·期 4
·76
·
IF 2.8
Jun Hu,Hongyang Yu,Yanan Wang
The chemical looping steam reforming of methane (CLSR) employing Fe-containing oxygen carriers can produce syngas and hydrogen simultaneously. However, Fe-based oxygen carriers exhibit low CH4activation ability and cyclic stability. In this work, oxygen carriers with fixed Fe content and different Fe/Ni ratios were synthesized by the sol–gel method to investigate the effects of Ni-Fe-Al interactions on CLSR performance. Ni-Fe-Al interactions promote the growth of the spinel structure and regulate both the catalytic sites and the available lattice oxygen, resulting in the CH4conversion and CO selectivity being maintained at 96–98% and above 98% for the most promising oxygen carrier, with an Fe2O3content of 20 wt% and Fe/Ni molar ratio of 10. The surface, phase, and particle size were kept the same over 90 cycles, leading to high stability. During the CLSR cycles, conversion from Fe3+to Fe2+/Fe0occurs, along with transformation between Ni2+in NiAl2O4and Ni0. Overall, the results demonstrate the feasibility of using spinel containing earth-abundant elements in CLSR and the importance of cooperation between oxygen release and CH4activation.
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Small
·
2025
·
IF 12.1
Mingbo Wu,Dong Li,Yao Liu,Xin Li,Xiaomiao Ruan,Jingwen Yang,Zegang Li,Siyi Chen,Xin Yang,Wenwu Ling
Current thrombolytic drug therapies are challenged by limited circulation time, off-target effects, and bleeding risks. In this study, multifunctional piezoelectric nanoplatforms are rationally designed for piezoelectric Fenton-assisted thrombolysis. Piezoelectric hollow barium titanate (hBT) nanoparticles (NPs) are synthesized via template-assisted etching and Fe-doping, followed by fucoidan grafting to obtain hBT 3Fe -Fu NPs. The hollow structure demonstrated a four-fold enhancement in piezoelectric response compared to that of solid NPs, and Fe-doping promoted the formation of oxygen vacancies, regulated the bandgap, and enhanced piezoelectric polarization. Moreover, ultrasound-triggered piezoelectrons accelerated Fe 3+ /Fe 2+ transformation, synergistically dissolving thrombi with 88.6% efficiency in vitro. In a venous thrombosis model, fucoidan-mediated active targeting achieved 2.4-fold greater NP accumulation at the thrombus site. Integrated piezoelectric-Fenton therapy resulted in complete thrombus dissolution and vessel recanalization while maintaining < 5% bleeding risk and negligible systemic toxicity. The engineered hBT 3Fe -Fu nanoplatform represents a promising non-pharmacological strategy for safe and effective piezocatalytic thrombolytic therapy.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Chenyang Xu,Juan Zhang,Shengpeng Chen,Zexing Wang,Xiangyun Tan,Miaotang Wei,Yanhui Guo
Anion exchange membrane water electrolysis driven by renewable energy sources such as solar and wind is recognized as a highly promising strategy for low-cost industrial-scale hydrogen production. However, the lack of durable and highly active electrocatalysts hinders the development of this strategy. Herein, a promising bifunctional Fe/NiWB@MS monolithic electrocatalyst is successfully developed through facile electroless plating and chemical etching methods. The Fe/NiWB@MS electrocatalyst requires only 113 mV and 267 mV to achieve 100 mA cm–2 for hydrogen evolution reaction and oxygen evolution reaction in a 1.0 M KOH solution. An AEM electrolyzer using Fe/NiWB@MS as both the cathode and the anode achieves a current density of 1 A cm–2 at a cell voltage of 1.84 V. This performance underscores its significant potential for industrial hydrogen production. This study not only introduces an efficient approach to the design of transition metal boride based electrocatalysts but also significantly advances the development of bifunctional electrocatalyst technologies for industrial-scale hydrogen production.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-21
·
IF 12.6
Zhao Jinchao,Lei Lei,Zeng Cheng,Zhou Xianfei,Ding Junkang,Dai Wenbin,Jiang Angfeng,Zou Shaomin,Jin Qiao,Tang Zhe
Incomplete radiofrequency ablation (iRFA) of hepatocellular carcinoma (HCC) has the risk to exacerbate the tumor immunosuppressive microenvironment and promote lung metastasis. There is an urgent need to reverse the immunosuppressive microenvironment and reduce lung metastasis after iRFA. Herein, an iron-based metal-organic framework loaded with capmatinib (Fe-MOF/Cap) is employed to reverse the immunosuppressive microenvironment dominated by M2-like tumor-associated macrophages (TAMs) after iRFA and inhibit lung metastasis of HCC. On one hand, Fe-MOF/Cap repolarizes M2-like TAMs to M1-like TAMs and inhibits the expression of PD-L1 after iRFA, promoting CD8+ T cell infiltration. The infiltration of CD8+ T cells and the decrease of PD-L1 are conducive to enhance the immunotherapy after iRFA. On the other hand, Fe-MOF/Cap can inhibit lung metastasis of HCC via inhibiting the expression of c-MET. In vitro and in vivo experiments confirm that Fe-MOF/Cap is able to significantly inhibit the lung metastasis of HCC after iRFA by inhibiting the c-MET/STAT3/VEGF pathway. Fe-MOF/Cap provides a potentially promising strategy for HCC immunotherapy and anti-metastasis after iRFA, with favorable clinical prospects.Graphical
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Hongyan Wei,Shoushu Wei,Qingze Chen,Yixuan Yang,Xun Liu,Shiqin Long,Jing Liu,Jianxi Zhu,Runliang Zhu
Metastable ferrihydrite nanoparticles and clay minerals always coexist as heteroaggregates in nature due to their abundance, opposite charge, and large interface energy. However, the impact of clay minerals on the transformation of ferrihydrite under anoxic conditions remains elusive. This study systematically investigated the effect of distinct clay minerals on the Fe(II)-catalyzed transformation of ferrihydrite and clarifying the underlying nanoscale mechanisms for the first time. Our results demonstrated that clay minerals could affect the production and recrystallization of labile Fe(III) (an active Fe(III) intermediate species formed by oxidation of Fe(II) at the ferrihydrite surface) by dispersing ferrihydrite aggregates. This modulation led to different transformation rates, higher crystallinity of formed lepidocrocite, and enhanced goethite formation in the heteroaggregates. Importantly, montmorillonite can accommodate Fe(II) and labile Fe(III) within its interlayer spaces, which further led to the inhibited crystallization of Fe(II) to magnetite and long-term preservation of labile Fe(III). Additionally, clay minerals served as templates for forming dendritic goethite and hexagonal magnetite nanoplates. Our findings provide new insights into the complicated roles of clay minerals in controlling the ferrihydrite transformation and other iron (oxyhydr)oxides formation, which is significant for predicting the bioavailability of iron and the fate of other coexisting contaminants.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Qianyi Wu,Mohammed Kamruzzaman
The detection of mercury(II) (Hg2+) and chromium(VI) (Cr6+) is of significant importance due to their high toxicity and harmful effects on the environment and human health. Conventional detection methods are often expensive and time-consuming, highlighting the need for efficient alternatives. Nanozyme-based detection systems have emerged as promising solutions, offering high sensitivity, stability, and cost-effectiveness. However, many existing nanozymes contain toxic components, limiting their practical application in environmental and food safety monitoring. This study reported the development of an organic polymer-based C-A-Fe nanozyme, synthesized via a simple self-assembly chelation process and exhibiting peroxidase-like activity. This nanozyme enabled an effective colorimetric sensing approach for Hg2+ and Cr6+ detection. This nanozyme enables highly sensitive and selective colorimetric detection of Hg2+ and Cr6+ with the assistance of glutathione (GSH) and 8-hydroxyquinoline (8-HQ), achieving detection limits as low as 9.65 nM for Hg2+ and 4.13 nM for Cr6+. Moreover, the system demonstrated high recovery rates in tap water, cod, and spinach samples, confirming its potential for real-world applications in environmental and food safety monitoring.
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ACS Applied Bio Materials
·
2025
·
IF 4.7
Ihtisham Ahmad Butt,Peinan Yin,Naihan Chen,Wei Zhang
The efficiency of photothermal therapy based on conventional Fe3O4 nanoparticles (NPs) is limited due to their low absorption in the near-infrared (NIR) region. To surmount this obstacle, α-Fe nanoparticles/multiwalled carbon nanotubes (MWCNTs) composite is synthesized by incipient wetness impregnation (IWI). Due to improved extinction and heat generation mechanism (plasmons/electrons thermalization) of metallic Fe NPs with in nanocomposite structure, the photothermal conversion efficiency of Fe/MWCNTs composite is 87.98% (content: 60 μg/mL, 808 nm at power density of 1 W/cm2), which is highest among the previously reported Fe3O4 and other carbon-based nanostructures. The HaCaT cell viability after 72 h of coculturing is more than 91%, indicating the good biocompatibility of nanocomposite. The viability of B16–F10 melanoma cells is only 9.78% (808 nm laser irradiation for 15 min at 0.33 W/cm2), demonstrating the potential for hands-on applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Tuowen Chen,Jingyi Tuo,Yihao Wu,Hui Wang,Yongduo Sun,Xuefei Huang
Fe-Cr alloys were fabricated using powder metallurgy (PM) with varying additions of ZrC (0–1.5 wt%) to investigate the influence on microstructure and mechanical properties. The resulting alloys exhibited a bimodal grain structure with dispersed nano-oxides (TaO, ZrO 2 ) and carbides (ZrC). The alloy containing 1.5 wt% ZrC demonstrated the most favourable combination of properties, achieving a yield strength of 1373 MPa and an elongation of 11.9 % at room temperature, which is attributed to synergistic dispersion strengthening. At 700°C, this alloy retained a yield strength of 470 MPa, surpassing that of many oxide dispersion-strengthened alloys. Incorporating ZrC refined the microstructure, promoted phase transformations, and inhibited the formation of coarse oxides, enhancing strength and ductility.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hao Wen,Haoyang Li,Weiwei Bai,Huibin Ge,Ruiyang Qu,Hepeng Zhang,Yueling Cao
In the quest for sustainable catalytic processes, non-noble metal catalysts offer a promising alternative for the selective hydrogenation of organic compounds. This work reports the design of a Fe-doped Mo 2 C catalyst (Fe-Mo 2 C@CN), featuring partial substitution of Mo atoms with Fe atoms, which exhibits remarkable catalytic performance in the chemoselective hydrogenation of nitro compounds. The Fe-Mo 2 C@CN-700 catalyst achieves a turnover frequency (TOF) of 36.6 h −1 at mild reaction conditions (80 °C and 1 MPa H 2 ), outperforming most non-noble metal catalysts reported under similar conditions. More notably, at near room temperature (30 °C and 1 bar H 2 ), it achieves high yields (≥93 %), making it competitive with noble metal catalysts. Studies reveal that Mo 2 C serves as the primary active site for hydrogenation, and partial substitution of Mo atoms with atomically dispersed Fe not only modulates the adsorption strength but also induces a tilted adsorption configuration of the nitro group, thereby facilitating more efficient hydrogenation. Fe-Mo 2 C@CN-700 delivers excellent yields (86–98 %) in the hydrogenation of a wide variety of functionalized nitroarenes to anilines, including sulfur-containing substrates and several high-value pharmaceutical nitroaromatics. The optimal Fe-doped Mo 2 C catalyst can also maintain its activity for >18 h in a fixed-bed reactor, implying its promising industrial application.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Renjie Liu,Yongjun Zhang,Zhenli Zhang,Hongjing Han,Haiying Wang,Yuting Guan,Yanan Zhang,Bolong Jiang,Xuzhong Gong,Enhao Sun,Yanguang Chen
Coke deposition is a key obstructive problem to be solved in the production of ethylene via steam cracking; moreover, the removal of graphitic carbon in coke is particularly difficult. A strategy integrating Fe–Mn bimetallic synergy at the B-site with oxygen vacancy engineering in perovskites was proposed to accelerate the catalytic conversion of coke/graphitic carbon via steam. DFT simulations and experimental results revealed that Mn incorporation induces dynamic lattice reconstruction of SrFeO3, generating abundant oxygen vacancies that enhance oxygen ion mobility and H2O adsorption. The interaction between Fe and Mn atoms has been observed to narrow the band gap, strengthen the hybridization of the O-2p and Fe-3d orbitals, induce electron delocalization, regulate the transfer of electrons from surrounding atoms to the adsorbed oxygen species, and thus accelerate the desorption and activation of *OH and the transfer of *O2–, which provides the possible reaction pathway for the transformation of graphitic carbon into CO or CO2. At 900 °C, the conversion of graphitic carbon and coke with steam catalyzed by SrFe0.1Mn0.9O3 reached 60.61% and 99.87%, respectively. This study provides an active material that facilitates the in situ online decoking strategy for catalytic coatings on steam cracking furnace tubes along with theoretical insights into the underlying reaction mechanism.
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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
·
2026
·
IF 6.2
Yulong Yang,Lifen Su,Rong Liu,Haoming Xie,Zijie Liu,Bin Yang,Jibin Miao,Ru Xia,Jiasheng Qian,Lei Miao
The solar-driven evaporation of water is deemed as the most promising technology for producing freshwater. However, the complex recalcitrant organic pollutants will contaminate and even shorten the life time of the photothermal materials. Herein, the vertically aligned Fe-doping carbon nanosheets (Fe/CNSs) aerogel were constructed to produce fresh-water from sewage. The porous vertically oriented structure was built by using melem as carbon resource via the ice-templating method. The carbon nanosheets were grown in-situ on the vertically aligned skeletons of melem under the catalysis of ferrocene. The obtained Fe/CNSs composites exhibit excellent hydrophilicity and sunlight absorption as high as 97.3%, resulting in an outstanding solar evaporation efficiency of 91.7% and completely degradation of organic pollutants (methylene blue, methyl orange, tetracycline hydrochloride and bisphenol A) under 1 sun irradiation (1 kW m −2 ) synergistically. The Fe atoms doped in the carbon nanosheets, which accelerate the generation and transportation of radicals via the photo-Fenton, leading to a rapid degradation efficiency and address the issue of Fe recycling. This work provides a promising strategy for treating the wastewater containing refractory pollutants, such as industrial, dyeing and pharmaceutical wastewaters.
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