CATALYSIS LETTERS
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2024
·
IF 2.3
Xu Pengfei,Ma Haiming,Shen Wenjuan,Quan Fengjiao,Li Jianfen,He Yun
Ammonia (NH 3 ) can be used as a fertilizer, a chemical or a new generation of fuel and has important agricultural and industrial value. Electrochemical NO 3 – -to-NH 3 (NITRR) can realize the conversion of waste into treasure and waste resources, which is a promising method for ammonia synthesis. However, the process of NITRR is very complicated, resulting in product diversification and poor selectivity. In this work, an iron modified cerium oxide in rod form (Fe/CeO 2 -rod) catalysts was designed and used for the NITRR. The Fe/CeO 2 -rod catalyst showed excellent activity, and achieves high Faradaic efficiency (FE 95%) and NH 3 yield rate (4.04 mg h –1 cm –2 ) in 0.1 M KOH electrolyte at – 0.52 V versus reversible hydrogen electrode. Furthermore, this catalyst exhibits a negligible activity decay during continuous electrolysis for 25 h. Further experiments provide the important role of Fe, which promote the formation of hydrogen radicals (H*). This study may provide new pathways to improve the activity of inexpensive catalysts for NITRR. Graphical Abstract
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International Journal of Nanomedicine
·
2025
·
IF 6.5
Jinlu Shang,Yongjun Chen,Fangliang Wang,Jing Yang,Yi Li,Liuxuan Yang,Xiuqiong Liu,Zhirong Zhong,Chaochi Yue,Meiling Zhou
Background Melanoma is an aggressive form of skin cancer, and single-modality treatments often fail to prevent tumor recurrence and metastasis. Combination therapy has emerged as an effective approach to improve treatment outcomes.Methods In this study, we developed a multifunctional nanoplatform, MIL@DOX@ICG, utilizing MIL-101-NH2(Fe) as a carrier to co-deliver the chemotherapeutic agent doxorubicin (DOX) and the photosensitizer indocyanine green (ICG). MIL-101-NH2(Fe) was synthesized via a hydrothermal method. Drug release was evaluated under different pH conditions, and the photothermal effect was tested under near-infrared (NIR) laser irradiation. Hydroxyl radical and reactive oxygen species generation capacities were quantified. Cellular studies using B16F10 cells assessed cytotoxicity, cellular uptake, migration inhibition, and colony formation suppression. In vivo experiments in melanoma-bearing mice evaluated antitumor efficacy and systemic safety through tumor growth inhibition, histological analyses, and toxicity assessments.Results MIL@DOX@ICG exhibited a uniform octahedral structure with a particle size of approximately 139 nm and high drug loading efficiencies for DOX (33.70%) and ICG (30.59%). The nanoplatform demonstrated pH-responsive drug release and potent photothermal effects. The generation of hydroxyl radicals via the Fenton reaction and reactive oxygen species production under NIR laser irradiation by MIL@DOX@ICG were confirmed. In vitro assessments revealed significant cytotoxicity of MIL@DOX@ICG against B16F10 cells under NIR laser irradiation, with improved efficacy in inhibiting cell proliferation and migration. In vivo studies confirmed the superior antitumor efficacy of MIL@DOX@ICG + NIR treatment, synergistically harnessing chemotherapy, photothermal therapy, photodynamic therapy, and chemodynamic therapy effects while maintaining excellent biocompatibility.Conclusion Our findings underscore the potential of MIL-101-NH2(Fe) nanoparticles as a versatile and effective platform for synergistic melanoma therapy, offering a promising strategy for overcoming the limitations of conventional treatment modalities.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Weishi Huang,Chenxi Wu,Minghao Gou,Xiaochun Wu,Le Zhang,Ting Liu,Jianlong Wang
The conversion of nitrate nitrogen (NO 3 − -N) or ammonia nitrogen (NH 4 + -N) to dinitrogen (N 2 ) by chemical process for total nitrogen (TN) removal is meaningful, but still a challenge in wastewater treatment. Herein, zero valent iron (Fe 0 ) loaded active carbon (Fe 0 @AC) was prepared and used to remove TN from the nitrogen-containing wastewater by an efficient chemical reduction coupled with oxidation process (FeR-PSO). In the step of NO 3 − -N reduction by Fe 0 @AC, Fe 0 @AC with 25 wt% Fe 0 could reduce 100 % NO 3 − -N with the initial concentration of 50 mg N/L after 60 min at the Fe 0 @AC dosage of 9 g/L and initial pH of 3.0, and over 30 % NO 3 − -N could be reduced to N 2 . In the subsequent oxidation step, persulfate (PS) and magnesium oxide (MgO) were introduced into the solution after NO 3 − -N reduction to selectively oxidize NH 4 + -N to N 2 . The removal efficiency of NH 4 + -N and N 2 selectivity after 30 min were 100 % and over 90 %, respectively, at the MgO dosage of 8 g/L and the PS dosage of 20.25 g/L. The developed FeR-PSO process could remove 93.40 % of TN from simulated wastewater, and over 90 % of TN from two actual pickle factory wastewaters. The possible mechanisms of NO 3 − -N reduction and NH 4 + -N oxidation by FeR-PSO process were proposed. These findings provide new insights for TN removal from NO 3 − -N containing wastewater or wastewater containing both NO 3 − -N and NH 4 + -N by chemical process.
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ChemistrySelect
·
2024
·Vol. 9
·期 44
·e202403927
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IF 1.9
Hui Han,He Cui,Jiabo Wang,Kai Ge,Yongfang Yang
Graphical In this paper, 2D MOF-Co, 2D MOF-Co/Cu, and 2D MOF-Co/Cu/Fe are designed and prepared using 1,4-benzendicarboxylic acid (1,4-BDC) as organic ligands. Their charge transfer, separation efficiency, and effects on photocatalytic CO 2 reduction are studied. The results show that 2D multimetallic MOF-Co/Cu/Fe has better photocatalytic CO 2 reduction activity, so it has higher research value and development prospect in the field of photocatalytic CO 2 reduction. In this study, 2D multimetallic MOFs combined with the advantages of 2D nanosheets, with the synergetic effect of multimetallic nodes, exhibited good photocatalytic activity for reduction of CO 2 . Herein, a 2D MOF-Co/Cu/Fe were successfully prepared via one-pot stirring of the solutions of multimetal salts and organic ligands at room temperature. Introduction of the second and third metal (Cu and Fe) into MOF-Co does not change the 2D morphology of MOFs, although it improved the photocatalytic CO 2 reduction performance by broadening the light absorption range of 2D MOF-Co, accelerating the separation efficiency and transfer rate of photogenerated carriers. Upon irradiation with full-spectrum light, the average CO yield of 2D MOF-Co/Cu/Fe achieved 17.06 µmol·g −1 ·h −1 , being about 1.8 and 1.2 times that of 2D MOF-Co and 2D MOF-Co/Cu. This work provides an insight into 2D multimetallic MOFs-based photocatalysts in catalytic CO 2 reduction.
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CHEMISTRY-A EUROPEAN JOURNAL
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2024
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IF 3.9
Tingting Xiang,Qingchao Zhu,Tanyu Zhou,Chenglong Chen,Ruibo Wang,Tieyu Hu,Bing Li,Ziwei Xu,Juan Yang
Graphical Fe−N−C catalysts, doped with phosphorus, show improved ORR activity. Fe-NPC catalyst exhibits high metal loading, excellent ORR performance (onset potential of 1.00 V, half-wave potential of 0.864 V), and promising application in Zn-air batteries (758.8 mAh g −1 Zn ). DFT calculations reveal that phosphorus enhances O 2 activation and reduces the energy barrier for the rate-determining step. Atomically dispersed iron and nitrogen co-doped carbon materials (Fe−N−C) represent promising non-precious metal catalysts for the oxygen reduction reaction (ORR), offering potential alternatives to noble metal-based benchmarks. In our study, we investigated the influence of phosphorus doping on the catalytic activity of Fe−N−C. The experimental research demonstrate that the doping of phosphorus significantly enhances the ORR activity. Specifically, the resulting Fe-NPC exhibits high metal loading and excellent ORR activity in 0.1 M KOH with an onset potential of 1.00 V and a half-wave potential of 0.864 V. Density functional theory (DFT) simulations reveal that phosphorus improves the electrocatalytic activity by activating O2 molecules and reducing the energy barrier (the hydrogenation reaction *OH→H2O) of the rate-determining step. Furthermore, Fe-NPC exhibits promising application prospects as an air cathode in Zn-air batteries, delivering a high maximum discharge power density of 180.3 mW cm −2 and outstanding discharge specific capacity (758.8 mAh g −1 Zn ) at a discharge current density of 10 mA cm −2 .
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hongyue Li,Jun Yao,Zhiqiang Peng,Mengyun Yang,Taotao Zhao,Peng Wang,Yupei Zhao
As is well known that, transition metal sulfides often face challenges such as excessive intermediate adsorption and poor electrical conductivity, which greatly limits their use in large-scale water electrolysis. Herein, we prepare a Fe-Co bimetallic synergistic catalyst based on solvothermal method. This catalyst ((FeCo) 9 S 8 /C-1) exhibits excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance due to multiple synergistic effects. For instance, low overpotentials of 284.7 mV for OER and 310 mV for HER at 10 mA·cm −2 could be reached in 1 M KOH, while the electrochemical active surface area reaches 40.25 m 2 ·g −1 , which is twofold compared to bare Co 9 S 8 . Density Functional Theory (DFT) calculations further reveal the strong charge transfer between Fe and Co would reduce the energy barriers for the rate-determining steps, enhancing the desorption of *OOH and *H intermediates, as well as improving the electrocatalytic efficiency. This study opens new avenue for designing other dual-transition metal sulfides for water splitting with high-performance.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Jieying Wan,Hao Zhang,Ji Yang,Jiageng Zheng,Zhongkang Han,Wentao Yuan,Bingru Lan,Xiaodong Li
Electrochemical nitrate to ammonia conversion provides an eco-friendly route for a highly valued product. However, nitrite intermediate formation and hydrogen evolution competition hinder full conversion. Here, we implement a Fe-Mo dual single-atom catalyst where the two metals work in tandem to achieve nitrate to ammonia conversion with excellent activity and stability, an ammonia yield rate of up to 13.56 mg cm −2 h −1 and a Faradaic efficiency up to 94%. In-situ Raman and Fourier-transform infrared spectroscopy confirms nitrite as the intermediate bound to metal sites. Time-dependent detection of products and DFT calculations support a tandem mechanism: the Mo single atoms are the preferred sites for the conversion of nitrate to nitrite, while the Fe single atoms catalyze the further conversion of nitrite to ammonia. This discovery paves the way for energy-relevant transformations using bimetallic single-atom catalysts.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Juan Du,Hao Fang,Jialiang Ma,Jing Lin,Shikuo Li,Yu Jiang,Fangzhi Huang
Synergistic photothermal-magnetothermal activation overcomes environmental interference (e.g., cloud cover) that critically limits solar evaporator efficiency, enabling robust all-weather vapor generation. Herein, we demonstrate in-situ synthesis of a covalently integrated Fe₃O₄/hydrogel composite via ice-templating and interfacial covalent bonding engineering. Si-O-Fe bonds anchor KH-570 onto Fe₃O₄, enabling copolymerization of surface-grafted methacryloyloxy groups with acrylamide monomers for covalent network grafting, while programmed gravitational sedimentation yields a hierarchical porous hydrophilic magnetic gel solar interfacial evaporator (MSE) with magnetothermal interface. This architecture reduces evaporation enthalpy, achieving 2.33 kg m −2 h −1 under 1 sun. Significantly, synergistic activation by an alternating magnetic field and 1 sun irradiation boosts the evaporation rate for 3.5 wt% saline water to 2.94 kg m −2 h −1 . This work establishes the magnetothermal-photothermal synergy within the covalently integrated MSE as an effective material design paradigm for all-weather solar desalination.
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ACS Applied Nano Materials
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2025
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IF 5.5
Haoming Xie,Lifen Su,Yulong Yang,Jibin Miao,Ru Xia,Jiasheng Qian,Lei Miao
Water scarcity and pollution are the challenges most countries face around the world, especially the large amount of organic wastewater. Solar-driven evaporation is an environmentally friendly and high-performance technology of freshwater production. However, photothermal materials fail when the water includes complex recalcitrant pollutants such as tetracycline hydrochloride (HCL-TC) and bisphenol A (BPA). Here, Fe@carbon nanotube (Fe@CNT) arrays were prepared in situ by using acetonitrile as the carbon source and ferrocene as the catalyst, followed by further solar-driven water evaporation and photo-Fenton catalytic degradation of organic pollutants synergistically. Owing to the Fenton effect and excellent solar absorption, Fe@CNTs accelerate the separation of photogeneration electron–hole pairs to improve the degradation of organic pollution and production of freshwater. Therefore, the Fe@CNT layers show outstanding solar absorption and hydrophilicity, resulting in a high solar evaporation efficiency of 94%. Meanwhile, the degradation efficiencies of organic pollutants (methylene blue, HCL-TC, and BPA) are more than 99% due to the synergistic effect of photothermal and photo-Fenton-catalysis effects. This work provides a promising strategy for the treatment of organic wastewater in an environmentally friendly way.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Huiyu Sun,Xinyu Gu,Jun Yu,Nannan Zhang,Zhengying Wu,Jiawei Qiang,Zhongjie Song,Yukou Du
The oxygen evolution reaction (OER), as the core half-reaction in water electrolysis (WE), plays a decisive role in determining the overall efficiency of hydrogen production. Cobalt carbonate hydroxide (CoCH) has recently emerged as a attractive material for alkaline OER due to its robust structural stability. In this study, urchin-like CoCH was employed as a precursor template to synthesize Fe and Mn co-modified CoCH catalyst on nickel foam (NF) through Mn-doping and surface Fe-modification strategies (recorded as Fe,Mn-CoCH/NF). This optimized hierarchical structure enhanced the exposure of active sites and facilitated faster electron/mass transport paths. The incorporation of Fe and Mn effectively regulated the position of d-band center and facilitated a more efficient lattice oxygen mechanism (LOM) for OER, thereby enhancing the intrinsic activity of the catalyst. Compared to the unmodified CoCH/NF, the Fe,Mn-CoCH/NF exhibited significantly improved OER catalytic activity, characterized by a substantially reduced overpotential (204 mV at 10 mA cm −2 ) in alkaline electrolyte, alongside remarkable stability. Utilizing this catalyst, an overall water splitting (OWS) system was further developed, capable of driving efficient OWS at a low cell voltage (1.49 V at 10 mA cm −2 ). Furthermore, the unique hierarchical structure of Fe,Mn-CoCH/NF contributed to mitigating electrochemical corrosion and the toxic effects of Cl − during seawater electrolysis, enabling the catalyst to maintain excellent catalytic activity and stability even in alkaline seawater system.
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JOURNAL OF SOLID STATE CHEMISTRY
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2024
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IF 3.2
Lang Wang,Yonghang Zhang,Linxiang Zhou,Guangtao Luo,Zhiwei Meng,Haodong Jin,Enze Zhu,Mingli Xu
The cathode's oxygen reduction reaction (ORR) plays a crucial role in a variety of fuel cells. Developing affordable and efficient non-precious electrocatalysts for the ORR poses a major hurdle in the realm of electrochemical energy technologies. This work presents a transition metal-based catalyst, Fe-ONC, in which Fe is loaded in an oxygen-enriched nitrogen-doped carbon (NC) material. Oxygen enrichment of the catalyst was achieved by a pre-oxidation strategy. The XPS analysis reveals that Fe-ONC exhibits a higher abundance of oxidized species. The Fe of Fe-ONC exists in the form of Fe 3 O 4 particles and Fe-N x , respectively, which are uniformly distributed in the NC. The even spread of iron sites and the plentiful presence of oxygen-rich species are key factors in the superior ORR efficiency of Fe-ONC. Fe-ONC's half-wave potential (E 1/2 ) in an alkaline environment (0.1 M KOH) stands at 0.891 V, markedly surpassing the standard commercial Pt/C value (0.840 V). Additionally, Fe-ONC demonstrated enhanced longevity and resistance to ethanol in comparison to commercially available Pt/C. Fe-ONC's outstanding efficacy highlights its potential as an alternative to precious metal catalysts. The document outlines a plan for creating ORR catalytic materials that are sustainable, economical, and efficient.
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CHINESE PHYSICS LETTERS
·
2024
·Vol. 41
·期 12
·128401
·
IF 3.5
Xi Wen,Yang Qin,Yu Hao,Geng Chang,Kai Huang,Ming Lei,Xiaojun Shen,Yong He,Xuchao Pan,Yufeng Wu
Electromagnetic wave-absorbing materials play a crucial role in modern electronics, particularly in stealth and communication technologies. Carbon-based materials demonstrate considerable potential for the development and use of effective wave-absorbing substances, attributed to their complex structure, lightweight nature, excellent corrosion resistance, and affordability. Notably, nitrogen-doped carbon-based two-dimensional (2D) materials exhibit a more pronounced depletion effect on electromagnetic waves owing to their increased specific surface area and numerous polarization states. This article presents the successful synthesis of nitrogen-doped carbon (NC) 2D flakes using a hydrothermal method. In addition, single Fe atoms were successfully incorporated onto their surfaces, forming Fe@NC. The wave-absorbing capabilities of the Fe@NC samples were considerably improved, achieving a minimum reflection loss (RLmin) of −69.22 dB at 11.48 GHz and an effective absorption bandwidth of 5.79 GHz. The enhancement in electromagnetic wave absorption is attributed to the synergistic effects of magnetic loss, relaxation processes, dipole polarization, and electrical conduction loss. The successful synthesis of Fe@NC opens up new avenues for the development of atomically dispersed wave-absorbing materials.
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