Journal of Environmental Chemical Engineering
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2025
·Vol. 14
·期 1
·120944
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IF 7.2
Yong Xiang,Li Xu,Guoji Liu
Efficient recovery of Au(III) from electronic and industrial waste streams is of both economic and environmental importance. Herein, a pore-regulation strategy was developed to construct hierarchically porous NH 2 -MIL-101(Fe 1-x Cu x ). By employing 2-aminoterephthalic acid to coordinate simultaneously with Fe 3 + and Cu 2+ , the unstable Cu–O bonds were selectively removed through a mild acid-soaking treatment, thereby generating enlarged channels and hierarchical micro–mesoporous structures. The optimized framework achieved an Au(III) adsorption capacity of 944 mg g −1 , which was ∼30.7 % higher than that of unmodified NH 2 -MIL-101. Mechanistic studies demonstrated that the hierarchical pore architecture not only facilitated mass transfer but also enhanced accessibility of active sites, synergistically contributing to the superior adsorption performance. This work highlights that rational pore-channel engineering around adsorption sites can substantially boost the recovery efficiency of reducible precious metals, offering a novel design paradigm for advanced MOF-based adsorbents.
研究领域:
环境科学
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材料化学
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吸附分离
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资源回收
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配位化学
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产品关联
DOI
高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Xiang Gao,Kewei Li,Yan Huang,Ziyan Long,Yongguo Xiang,Wendi Zheng,Hong Cheng,Huijie Cao,Wenjuan Wan,Shijie Zheng,Xianwen Wang,Ke Hu
Age-related cataracts (ARCs) are major causes of vision impairment globally, primarily resulting from oxidative stress–induced senescence and apoptosis in lens epithelial cells (LECs). In this study, a sodium selenite-induced oxidative stress cataract model in neonatal rats was used to mimic ARC pathology. We investigated the therapeutic potential of Fe-curcumin nanozymes in delaying ARC progression by targeting cellular senescence and oxidative injury. In vitro experiments revealed that Fe-curcumin nanozymes significantly reduced reactive oxygen species (ROS) levels in H 2 O 2 -treated LECs, alleviated cellular senescence, and decreased apoptosis. The levels of superoxide dismutase (SOD) and catalase (CAT) were also markedly increased. Notably, the nanozymes downregulated senescence-associated secretory phenotype (SASP) factors, including IL-6, IL-1β, CXCL1, and TGF-β, indicating suppression of the proinflammatory senescent microenvironment. In vivo , Fe-curcumin nanozyme treatment effectively delayed cataract development in rats. Mechanistically, the nanozymes inhibited both senescence and apoptosis by modulating the p53/p21/BAX signaling axis, primarily through reducing p53 expression and phosphorylation levels. These findings suggest that Fe-curcumin nanozymes represent a promising therapeutic strategy for ARCs by suppressing oxidative damage, cellular senescence, and inflammation through targeting p53-related pathways.
研究领域:
医学
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生物化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zixia Tang,Hong Tao,Xiao Wang,Lu Chen,Chi Song,Guanhong Lu,Xiaofeng Xie,Jing Sun
The implantation of metal nanoparticles (MNPs) into metal–organic framework (MOF) hosts is a promising means to prepare high-performance photocatalysts for the degradation of gas pollutants. However, the uniform encapsulation of MNPs in MOFs is still challenging. Herein, a facile “quasi-in situ” encapsulation method is proposed by utilizing the spatial confinement effect of the colloidal network formed during the synthesis of the MIL-100(Fe) monolith [noted as m-MIL-100(Fe)]. Highly dispersed Ag NPs with an average diameter of ∼2 nm are encapsulated in the MIL-100(Fe) monolith to form a unique “watermelon-seed” structure, which ensures the large contact area between the two components and protects Ag NPs from being oxidized. The fast charge transfer between m-MIL-100(Fe) and Ag NPs enables the spatial separation of electron–hole pairs and promotes the generation of oxidative radicals. Compared with pristine m-MIL-100(Fe), the 0.2 wt % Ag@m-MIL-100(Fe) composite shows obviously enhanced photodegradation efficiencies for flowing o-xylene under both xenon (∼97%) and visible light (∼80.0%) with high stability. This work not only provides a promising Ag@m-MIL-100(Fe) material for eliminating air pollutants but also gives a versatile means for the design and synthesis of nanoparticles@MOFs composites with desired performance.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Chenhui Hu,Chunhong Liu,Kaimin Du,Chengkai Pang,Zuoxi Zhuo,Qiangsheng Gao
An energy-saving catalyst 4%Fe/Ce-Mn-TiO 2 was prepared via a simple one-step impregnation-annealing process and used as a denitration catalyst at low temperature (≤180 °C) and high water content (∼20%). The results show that 4%Fe/Ce-Mn-TiO 2 catalyst exhibits good low-temperature catalytic activity and water resistance attributed to its highly dispersed metal oxide species, more surface-adsorbed oxygen and high stability of particles. The denitrification efficiencies of 4%Fe/Ce-Mn-TiO 2 catalyst are 90% (5% H 2 O) and 70% (20% H 2 O) at 170 ℃ respectively, which are superior to the commercial vanadium catalyst in service usually needs heating up to 220 ℃.
研究领域:
环境科学
·
催化
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化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Yihe Qin,Run Yuan,Shaojun Luo,Haiming Huang,Xuwen He
Catalysts with high catalytic performance are crucial for the catalytic ozonation of organic wastewater. This study synthesized an efficient, stable, and practical Fe-Mn/Al 2 O 3 ozone catalyst for wastewater treatment using an impregnation calcination method, and applied it in the catalytic ozonation of wastewater. When the concentration of manganese nitrate was 0.15 mol/L, the Mn/Fe ratio was 3:1, the immersion time was 24 hours, the calcination temperature was 500 ℃, and the calcination time was 4 hours, the prepared Fe-Mn/Al 2 O 3 had the best catalytic effect on simulated wastewater, with a chemical oxygen demand (COD) removal efficiency of 73.6%. At the same time, the physicochemical properties of the catalyst were investigated, and the catalytic effect of the catalyst on actual coking wastewater was investigated on a laboratory scale. When the ozone concentration was 20 mg/L, the gas flow rate was 0.5 L/min, the catalyst concentration was 400 g/L, and the pH was 7.02, the actual COD removal efficiency of coking wastewater was 71.6%. The pilot test results showed that the COD of the treated coking wastewater could stably meet the standard (COD<80 mg/L), with an average COD removal rate of about 58.3%, indicating that the Fe-Mn/Al 2 O 3 had high catalytic activity and good stability. Kinetic analysis showed that the degradation process of organic pollutants followed the pseudo-second-order kinetic equation. The results of water quality analysis such as conventional water quality indicators, fluorescence spectroscopy, and molecular weight classification indicated that the large molecular organic pollutants were efficiently degraded. Mechanism analysis indicated that the active components of the catalyst reacted with ozone through electron transfer to enhance the ozone utilization efficiency and efficiently remove organic pollutants. This study can provide theoretical support and technical reference for the standardized discharge of coking wastewater in the future.
研究领域:
环境科学
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废水处理工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jian Sun,Haobo Ma,Jiafei Ren,Xia Han,Juan Liu
The practical application of photo-Fenton processes to degrade contaminants is limited by their poor stability under varying pH environment. The requirement of supplementary oxidants and iron additives increase the cost. This reports the construction of Z-scheme heterojunction with Fe coordinatively unsaturated metal sites (Fe CUMSs) based on g-C 3 N 4 as the highly efficient photo-Fenton catalysts. The optimized catalyst presented stable MB degradation efficiency of 115.32 mg g −1 (pH 4.0), 113.44 mg g −1 (pH 7.0), and 106.35 mg g −1 (pH 9.0) in 30 mins without any oxidants and iron-containing additives. The self-feeding photo-Fenton mechanism was studied in details, suggesting that Fe CUMSs improved the H 2 O 2 generation rate of g-C 3 N 4 to 6.23 μmol L −1 h −1 . A completely reversible Fe 2+ /Fe 3+ conversion process lead to persistent generation of hydroxyl radical to degrade MB without iron precipitation generation. This work presents a new strategy constructing self-feeding photo-Fenton catalytical system to remove contaminants for environmental remediation and sustainability.
研究领域:
环境科学
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材料科学
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催化化学
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产品关联
DOI
高影响因子
STAR Protocols
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2022
·
IF 0
Xiao Wang,Wei Zhou,Hao Wu,Wei-Qiao Deng
Summary Single-atom catalysts (SACs) have promising atomic utilization efficiency and catalytic activity, but their construction with a specific coordination mode remains challenging. This protocol describes the synthesis of a coordinated Fe-SAC@COF for boosted electrocatalytic oxygen evolution reaction (OER). We also detail the steps for single iron atoms confinement and characterization of the COF and Fe-SAC@COF with X-ray diffraction and transmission electron microscopy technique. For complete details on the use and execution of this protocol, please refer to Wang et al. (2022) .
研究领域:
材料科学
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催化
·
电化学
✓ 已验证
DOI
PubMed
CARBON
·
2022
·
IF 11.307
Fangqian Han,Liu Qian,Qianru Wu,Dong Li,Shulan Hao,Lihu Feng,Liantao Xin,Tao Yang,Jin Zhang,Maoshuai He
A SiC supported iron (Fe–SiC) catalyst was developed for chemical vapor deposition (CVD) growth of carbon nanotubes. Using CO as the carbon source, sole Fe–SiC catalyst was mostly inactive for synthesizing carbon nanotubes and only trace amount of carbon deposits was produced. In contrast, the powder Fe–SiC catalyst could be activated by pressing them onto a flat SiO 2 substrate or by mixing them with porous MgO powders. Particularly, efficient growth of single-walled carbon nanotubes (SWNTs) was achieved on porous MgO promoted Fe–SiC catalyst, and predominant synthesis of (6, 5) SWNTs was realized at a reaction temperature of 650 °C. Systematic characterizations revealed that the reducibility of the Fe–SiC catalyst was enhanced by the physical contact with oxide support, which promotes the formation of small active Fe nanoparticles for the subsequent SWNT nucleation and growth. This work not only deepens our understandings to the catalyst activation mechanisms, but also helps design composite catalyst for synthesizing SWNTs.
研究领域:
材料科学
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纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Taehyeob Im,Kwiyoung Lee,Jonghyeok Ahn,Minjong Kim,Dongsup Lee,Jai-Sung Lee,Jongryoul Kim,Caroline Sunyong Lee
Fe-4.5Si-based soft magnetic composite (SMC) cores suitable for high-frequency applications were studied using ball milling and furnace sintering. Through ball milling, Fe-4.5Si powder was coated with Mg(OH) 2 nanoparticles to form a uniform insulation layer, introducing a novel method to optimize the furnace sintering process by adding H 3 BO 3 and SiO 2 to the insulation layer. Mg(OH) 2 nanoparticles effectively coated on Fe-4.5Si powder through ball milling formed MgO and Mg 2 SiO 4 double insulation layers after heat treatment, which provided stable insulation layer and minimized core loss in high-frequency regions up to 1 MHz. Furthermore, applying a 7% MgO–B 2 O 3 –SiO 2 insulation for sintering at 1100 °C resulted in an increase in permeability to 68, starting from its initial value of 28 at 100 kHz, while porosity decreased from 18.1% to 9.3%, minimizing the degradation of the insulation layer. After sintering, phase analysis of the MgO–B 2 O 3 –SiO 2 insulation revealed the presence of Mg 2 B 2 O 5 , MgSiO 3 , and a liquid phase, indicating densification of the cores owing to the diffusion reaction and liquid phase sintering among MgO–B 2 O 3 –SiO 2 . Therefore, the ball-milling and furnace sintering processes shown in this study provide an effective solution for increasing density of Fe-4.5Si powder-based SMC cores to develop magnetic cores suitable for high-frequency applications.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
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IF 7.015
Atian Xie,Jiuyun Cui,Jin Yang,Yangyang Chen,Jihui Lang,Chunxiang Li,Yongsheng Yan,Jiangdong Dai
Membrane fouling is one of the major blockages toward the further sustained development of membrane technology . In this work, PVDF/NH 2 -MIL-88B(Fe) (PVDF/NM88B) membranes were prepared for the first time via one-step simple non-solvent induced phase conversion method. The PVDF/NM88B membrane shows an excellent separation performance (above 99.4%) and permeation flux (340–1970 L m −2 h −1 bar −1 ) towards different oil/water emulsions. Moreover, PVDF/NM88B membrane exhibits excellent antifouling performance with flux recovery ratio of almost 100% attributing to hydrophilicity and high photo-Fenton activity of NM88B. In addition, the membrane with good mechanical properties and recyclability shows great application potential in wastewater treatment . This work may shine a new light on the promising photo-Fenton self-cleaning prospect of Fe-based MOFs in constructing antifouling membranes for wastewater remediation and potential applications.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 3.8
Li Zhang,Yu Yan,Diannan Huang,Liansong Gao,Rongxin Zhang
Anaerobic fermentation technology presents significant advantages in waste activated sludge treatment, encompassing sludge reduction, detoxification, and resource recovery, primarily by generating high-value volatile fatty acids (VFAs). This study systematically investigated the enhancement effects of Fe²⁺/sodium percarbonate (SPC) pretreatment on sludge disintegration and organic matter hydrolysis. The optimal pretreatment conditions (initial pH=3, SPC dosage=0.3 g/g TSS, Fe²⁺ dosage=0.3 g/g TSS) resulted in a maximum VFAs production of 1598 mg COD/L, representing a 7.26-fold increase compared to untreated sludge. Under these conditions, acetic acid accounted for 52.9 % of the total VFAs. The mechanistic analysis demonstrated that Fe²⁺/SPC pretreatment selectively enriched hydrolytic-acidogenic microbial communities while inhibiting VFAs-consuming populations, thereby directing metabolic flux toward acid accumulation. These findings establish an innovative technical approach and provide a mechanistic framework for advanced resource recovery from waste activated sludge.
研究领域:
环境工程
·
微生物学
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产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2025
·
IF 4.6
Yanting Zhou,Junchao Zhao,Tengfei Wang,Zhilei Yu,Yangyang Fu,Yong Jiang,Xudong Cheng,Heping Zhang
Despite the exceptional fire-suppressant capabilities of ultrafine dry powder fire extinguishing agents, additional work is essential to improve their overall fire-extinguishing performance. In this investigation, we explored the utility of Fe 3+ loaded ZSM-5 zeolite in enhancing the firefighting capabilities of ultrafine dry powder fire extinguishing agents. The loading of transition metal ions Fe 3+ onto the ZSM-5 zeolite was achieved through the ion solution exchange method. Interestingly, the loading of Fe element on Fe/ZSM-5 zeolite displayed a pattern of initial increase followed by decrease as the ion exchange time lengthened. Furthermore, the loading of Fe element on Fe/ZSM-5 zeolite was found to be influenced positively by the initial molar concentration of Fe 3+ and pH levels. Impressively, under specific working conditions, the prepared Fe/ZSM-5 zeolite demonstrated a substantial Fe element loading of 5.82 %. Incorporation of ZSM-5 zeolite resulted in a 10.01 % enhancement in the fire-extinguishing efficiency of the ultrafine dry powder compared to undoped samples. Moreover, the incorporation of Fe/ZSM-5 zeolite has resulted in an enhancement of fire extinguishing efficiency by 20.45 % (S3), 24.20 % (S4), and 29.04 % (S5) in comparison to S1. These findings contribute to the understanding that the incorporation of Fe/ZSM-5 zeolite significantly enhances the fire extinguishing performance of ultrafine dry powder fire extinguishing agents, with extinguishing efficiency improving with increased Fe element loading.
研究领域:
材料科学
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消防工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）