Processes
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2024
·Vol. 12
·期 9
·1879
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IF 2.8
Huiying Yang,Xiangchao Meng
The conversion of nitrogen (N2) and water (H2O) into NH3by photocatalysis under ambient conditions has been considered an environmentally friendly strategy. However, developing effective catalysts for N2fixation is still challenging. Herein, we report a bimetallic JH Fe, Co/TiO2derived from NH2-MIL-125(Ti) by the fast Joule heating (FJH) method for visible–light–driven catalytic N2fixation. It was found that the photocatalytic N2reduction efficiency of bimetallic FC@TiO2-JH was improved, enabling an NH3yield rate of 110.14 µmol g−1h−1without any sacrificial agents. Furthermore, the rate was higher than those of Fe@TiO2-JH and Co@TiO2-JH, suggesting that the synergistic effect between Fe and Co broke the electronic equilibrium and increased the center of its d-band, enhancing electronic feedback to the antibonding π* orbitals of N2while weakening the bonding energy of N≡N. Meanwhile, the rate was about 2.75 times higher than that of FC@TiO2-TF, which was calcined in a tube furnace. It is assumed that FJH might lead to the formation of lattice defects, leading to localized charge deficiency, enhanced carrier separation, and transport. Thus, doping of Fe and Co synergistically interacted with the defects produced from FJH, facilitating the photocatalytic reduction process. As detected, it had a greater ability to separate hole–electron pairs and transferred electrons to adsorbed N2at faster rates. Our work demonstrates a prospective strategy for designing bimetallic catalysts derived from NH2-MIL-125(Ti) for N2fixation.
研究领域:
材料科学
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环境科学
·
催化化学
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产品关联
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-11
·
IF 4.011
Li Junchao,Li Xuhua,Han Jindong,Meng Fansheng,Jiang Jinyuan,Li Jiao,Xu Chunlian,Li Yun
Mesoporous bimetallic Fe/Co was prepared as a Fenton-like catalyst to degrade the tetracycline hydrochlorides (TC). The nanocasting strategy with KIT-6 as a hard template was carried out to synthesize the mesoporous bimetallic catalyst. The mesoporous bimetallic Fe/Co catalyst was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), nitrogen adsorption-desorption isotherms, and Brunauer-Emmett-Teller (BET) method. The results showed that the catalyst has significant nanofeatures; the surface area, pore size, and particle size were 113.8 m 2 g −1 , 4 nm, and 10 nm, respectively. In addition, the effects of the operating parameters, such as the iron-to-cobalt ratio, pH, H 2 O 2 , and initial TC concentrations on its catalytic performance were investigated. The best operating parameters were as follows: iron-to-cobalt ratio = 2:1 to 1:1, pH = 5–9, H 2 O 2 : 30 mmol, initial TC less than 30 mg/L. Furthermore, the mesoporous bimetallic Fe/Co showed a good performance for degrading TC, achieving a removal rate of 86% of TC after 3 h under the reaction conditions of H 2 O 2 = 30 mmol, mesoporous bimetallic Fe/Co = 0.6 g/L, TC = 30 mg/L, pH = 7.0, and temperature = 25.5 °C. The mesoporous bimetallic Fe/Co catalyst shows good stability and reusability. This work demonstrated that mesoporous bimetallic Fe/Co has excellent catalytic efficiency, smaller amounts of leached ions, and wider pH range, which enhance its potential applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Yulan Zheng,Peng Cheng,Zikuo Li,Chuhao Fan,Jinchao Wen,Yue Yu,Li Jia
To achieve the efficient removal of gaseous elemental mercury in coal-fired flue gas, the study successfully prepared the isostructural bimetallic MOFs-based biochar composite by introducing the transition metal Fe into the UiO-66 by solvothermal method and using in-situ growth method for structural design. In addition, the effect of doping the secondary metal Fe and biochar on the Hg 0 removal performance and the corresponding quantitative correlation mechanism was established. The results showed that the overall mercury removal performance of the samples after Fe modification was improved. The optimal Fe loading ratio was 10 %, which corresponded to the adsorption capacity of 127.65 μg·g −1 . The biochar promoted the electron transmission and transfer of the overall reaction system by exerting the carrier effect. The 10 %Fe-UiO-66@20 %BC composite showed the best Hg 0 removal performance, with the corresponding adsorption capacity of 150.74 μg·g −1 . Fe 3+ , lattice oxygen, and chemisorbed oxygen jointly participated in the oxidation process of Hg 0 and finally oxidized Hg 0 to HgO.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Chunying Dong,Yuang Pang,Yan Chen,Zhan Gao,Meiqiang Cai,Micong Jin,Zongsu Wei
Sludge based catalysts (SBCs) has been considered as a promising and viable approach to sludge reclamation. Herein, we fabricated bimetallic Fe-Ti doped SBCs via a facile synthesis with sludge containing polyacrylamide (PAM) as N-precursor. The adsorption capacity and degradation efficiency of as-synthesized SBCs were assessed using tetracycline (TC) as a target pollutant, in which PAM in sludge played a dual role by promoting porosity, active sites, and structural defects beneficial for persulfate (PS) activation. Fe-Ti doping induced the activation of PS by a fast redox cycle of Fe 3+ /Fe 2+ associated with the coexistence of Ti 4+ /Ti 3+ , which enabled an efficient electron transfer between the catalyst and PS. The synergistic effect of PAM-derived N doping and Fe-Ti bimetals resulted in prevention of iron leaching and enhanced catalyst stability over a wide pH range. The surface SO 4 •− was the primary oxidant in the TC degradation process based on free-radical quenching experiments, and degradation pathways of TC were proposed given the intermediate evidence from UPLC-HRMS analysis. This study promotes the reclamation of PAM-containing sludge providing an eco-friendly and efficient process to activate PS for wastewater treatments .
研究领域:
环境科学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Kaibang Xiao,Fawen Liang,Jinzhi Liang,Weicheng Xu,Zhang Liu,Biru Chen,Xueding Jiang,Xiaolian Wu,Jianan Xu,Jingzi Beiyuan,Hailong Wang
Bimetallic Fe- and Ce-embedded N-enriched porous biochar (Fe-Ce@N-BC) was synthesized to activate peroxymonosulfate (PMS) for metronidazole (MNZ) removal. 97.5% decay of MNZ was achieved within 60 min in Fe-Ce@N-BC/PMS system. The kinetic reaction rate constant of the Fe-Ce@N-BC/PMS system (0.0566 min −1 ) was 10.5 times higher than that of the BC/PMS system (0.0054 min −1 ). The highly dispersed Fe-Ce oxide nanocrystals serve as PMS activation centers, while the addition of nitrogen source increases the surface area and porosity of biochar, as well as enhances the PMS activation performance. It is noteworthy that graphitic N and C O groups in biochar facilitates the PMS activation via a nonradical pathway and the Fe 2+ /Fe 3+ and Ce 3+ /Ce 4+ participate in the radical pathway. The presence of anion ions of SO 4 2− can promote the MNZ degradation process, while HCO 3 – and Cl − ions suppress the MNZ removal. The MNZ removal using Fe-Ce@N-BC in salty media behavior similarly with that in DDI water, while the decreased removal efficiency in real effluent could be mitigated by prolonging the reaction time. Finally, the degradation intermediate products of MNZ were identified and the pathway was proposed according to LC-MS analysis. The relatively low cytotoxicity of the Fe@Ce/N-BC evaluated by animal cell (A375) and toxicity evolution of MNZ intermediate products strongly suggest huge potential of utilization of the catalyst for aquatic environmental remediation.
研究领域:
环境科学
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材料科学
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毒理学
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Sini Lv,Fengzhen Zheng,Zeyu Wang,Luyao Dai,Huan Liu,Dzmitry Hrynshpan,Tatsiana Savitskaya,Jun Chen
The high hydrophobicity of n -hexane is the main reason why it is difficult to be removed biologically. In this study, the effects of bamboo-charcoal modified by bimetallic Fe/Pd (BBC) on n -hexane biodegradation by Pseudomonas mendocina NX-1 (PM) was investigated. The n- hexane removal efficiency was increased in the presence of BC. The highest n- hexane removal efficiency at 90.0% was achieved at 0.05 g L −1 BCE and 3 g L −1 NH 4 + under pH 7.7 and 35 °C. Additionally, protein content (45.9 μg mL −1 ) and negative cell surface zeta potential (−26.4 mV) were increased during biodegradation process, with PM-BBC being 43.1 μg mL −1 and 19.1 mV. Bacterial growth was improved and maximum cell surface hydrophobicity was obtained after 20 h, which was 59.4% higher than the control with PM-BBC (37.7%) or PM (16.1%), showing biodegradation products of 1-butanol and acetic acid. The results indicate that BBC improved n- hexane biodegradation efficiency by promoting bacterial growth, reducing cell zeta potential, exposing hydrophobic proteins, and increasing cell surface hydrophobicity of bacterial strain NX-1. This investigation suggests that BBC-enhanced biodegradation can be promising to treat n- hexane-containing gas.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
Science Advances
·
2024
·Vol. 10
·期 15
·
IF 11.7
Kerong Chen,Anwei Zhou,Xinyuan Zhou,Jielei He,Yurui Xu,Xinghai Ning
Disruptions in metal balance can trigger a synergistic interplay of cuproptosis and ferroptosis, offering promising solutions to enduring challenges in oncology. Here, we have engineered a Cellular Trojan Horse, named MetaCell, which uses live neutrophils to stably internalize thermosensitive liposomal bimetallic Fe-Cu MOFs (Lip@Fe-Cu-MOFs). MetaCell can instigate cuproptosis and ferroptosis, thereby enhancing treatment efficacy. Mirroring the characteristics of neutrophils, MetaCell can evade the immune system and not only infiltrate tumors but also respond to inflammation by releasing therapeutic components, thereby surmounting traditional treatment barriers. Notably, Lip@Fe-Cu-MOFs demonstrate notable photothermal effects, inciting a targeted release of Fe-Cu-MOFs within cancer cells and amplifying the synergistic action of cuproptosis and ferroptosis. MetaCell has demonstrated promising treatment outcomes in tumor-bearing mice, effectively eliminating solid tumors and forestalling recurrence, leading to extended survival. This research provides great insights into the complex interplay between copper and iron homeostasis in malignancies, potentially paving the way for innovative approaches in cancer treatment.
研究领域:
肿瘤学
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纳米技术
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治疗学
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS TODAY
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2020
·
IF 5.825
Juan Liu,Wen-Ying Li,Jie Feng,Xiang Gao
The improvement of the sulfur tolerance over Pt catalyst is critical for the hydrotreatment of crude oil. Fe was co‒impregnation with Pt on γ-Al 2 O 3 at different calcination temperature. Results revealed that adding Fe significantly facilitated the reduction of Pt oxides for the catalyst calcined at 400 °C. The morphological analysis and CO chemisorption showed Fe improved the dispersion of Pt nanoparticles. The surface chemical state analysis implied the co‒existence of the electron‒deficient Pt and metallic Fe. However, the increase of calcination temperature caused a decreased reducibility of Pt oxides due to strong metal support interaction. A higher dibenzothiophene hydrodesulfurization conversion of 97.7 % with a dominant biphenyl selectivity of 96.7 % were acquired for the catalysts incorporated with Fe. The density functional theory calculations confirmed the alloyed Fe led to the formation of electron‒deficient Pt atoms, and the higher affinity to sulfur made Fe be a favorable additive for noble metal catalyst in the hydrodesulfurization.
研究领域:
催化
·
化工
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Thi Le Cham-Bich,Nguyen Trinh Hao,Thi Le Mai Ngoc,Liem The Ho,Phuong Hoang Tran
The selective oxidation of biomass-derived carbohydrates into high-value platform chemicals represents a promising avenue for sustainable chemical production. In our work, we explored the catalytic performance of a bimetallic Fe/Cu loaded in carbon decorated with nitrogen-sulfur (Fe/Cu@NSC) in the conversion of fructose/glucose into 2,5-diformylfuran (DFF). The catalyst exhibited remarkable efficiency, particularly with fructose, achieving a peak DFF yield of 61.1% under optimized conditions. In contrast, glucose conversion proved less effective, with a maximum DFF yield of 29.1% at 160 °C for 15 h. Methodical examinations of reaction parameters, such as solvent composition, and reaction time, yielded crucial insights into the determinants of product dispersion and catalytic efficacy. Moreover, reusability evaluations demonstrated a slow reduction in catalytic activity throughout repeated cycles; yet, this negligible fall still affirms the promise of catalysts in green chemistry. In addition, the catalyst structure was evidenced by FTIR, XPS, HRTEM, SEM, BET, ICP-MS, NH 3 -TPD, EDX, elemental mapping analyses, and the thermal stability of the catalyst was evaluated by TGA. These findings underscore the potential of Fe/Cu@NSC as an effective and recyclable catalyst for DFF synthesis while highlighting the necessity for further optimization to enhance its long-term stability and performance.
研究领域:
催化化学
·
绿色化学
·
生物质利用
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可持续化学品生产
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Xueming Dang,Huimin Zhao
A hybrid of metal-organic frameworks (Fe, Mn) and Au nanoparticles anchored carbon nanotubes (Au/MOFs(Fe, Mn)/CNTs) was fabricated by a facile one-step hydrothermal process. The Au/MOFs(Fe, Mn)/CNTs exhibit highly enhanced peroxidase-like activity, because of the increased active sites, the enhanced partial charge density and electron transfer among the Fermi level of MOFs, Au and CNTs, as well as the synergistic action of Fe and Mn. The hybrid nanomaterials with high catalytic velocity (V max = 17.65 × 10 −7 M s −1 ) and affinity (K m = 0.33 mM) for substrates of H 2 O 2 display a great detection performance in the range of 0.34–53.05 nM with a limit of detection (LOD) of 0.18 nM (S/N = 3). Based on the cascade reaction of the artificial peroxidase and glucose oxidase (GOx), the glucose was further better detected in a linear range of 0.005–0.3 μM with a LOD of 0.002 μM (S/N = 3). Notably, considering the regulated peroxidase-like activity by sulfadimethoxine (SDM) aptamer , the concentration of SDM ranging from 0.54 to 41.58 μg L −1 was also detected with a LOD of 0.35 μg L −1 (S/N = 3). The as-synthesized hybrid nanozymes hold promising applications as the multifunctional sensing platform in environmental and biologic target detection with the combination of corresponding enzyme or specific aptamer.
研究领域:
纳米技术
·
材料科学
·
分析化学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）