Journal of Environmental Sciences
·
2023
·
IF 6.9
Ting He,Jie Sun,Liangwei Deng,Jialin Ming,Changwei Hu
Due to its high efficiency, Fe(II)-based catalytic oxidation has been one of the most popular types of technology for treating growing organic pollutants. A lot of chemical Fe sludge along with various refractory pollutants was concomitantly produced, which may cause secondary environmental problems without proper disposal. We here innovatively proposed an effective method of achieving zero Fe sludge, reusing Fe resources (Fe recovery = 100%) and advancing organics removal (final TOC removal > 70%) simultaneously, based on the in situ formation of magnetic Ca-Fe layered double hydroxide (Fe 3 O 4 @CaFe-LDH) nano-material. Cations (Ca 2+ and Fe 3+ ) concentration (≥ 30 mmol/L) and their molar ratio (Ca:Fe ≥ 1.75) were crucial to the success of the method. Extrinsic nano Fe 3 O 4 was designed to be involved in the Fe(II)-catalytic wastewater treatment process, and was modified by oxidation intermediates/products (especially those with COO − structure), which promoted the co-precipitation of Ca 2+ (originated from Ca(OH) 2 added after oxidation process) and by-produced Fe 3+ cations on its surface to in situ generate core-shell Fe 3 O 4 @CaFe-LDH. The oxidation products were further removed during Fe 3 O 4 @CaFe-LDH material formation via intercalation and adsorption. This method was applicable to many kinds of organic wastewater, such as bisphenol A, methyl orange, humics, and biogas slurry. The prepared magnetic and hierarchical CaFe-LDH nanocomposite material showed comparable application performance to the recently reported CaFe-LDHs. This work provides a new strategy for efficiently enhancing the efficiency and economy of Fe(II)-catalyzed oxidative wastewater treatment by producing high value-added LDHs materials.
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高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Jing Peng,Bihua Hu,Zhitong Li,Xiongwei Zhong,Junwei Shi,Shuyu Cui,Xingzhu Wang,Baomin Xu
Dual-metal single-atom catalysts with heteronuclear active sites exhibit superior oxygen catalysis performance than their single-atom counterparts, facilitating the practical applications in advanced electrochemical energy devices. Herein, a Fe-Cu dual-metal single-atom catalyst with Fe-N 6 and Cu-N 1 S 2 coordination environment (FeCu-DSAs/NSC) is reported. Due to the synergism of bimetallic active sites and asymmetric heteroatom coordination, the resultant FeCu-DSAs/NSC displays better bifunctional catalytic performance (a small potential gap between the E η10 and E 1/2 , ΔE=0.647 V) when compared with the counterparts (Pt/C+IrO 2 and Cu-ISAs/NSC), as well as surpassing most of bifunctional metal atom-based catalysts reported to date. As expected, FeCu-DSAs/NSC based rechargeable zinc-air battery shows remarkable superiority than commercial Pt/C+IrO 2 benchmark, resulting in a high peak power density (230.66 mW cm −2 ), open-circuit voltage (1.464 V) and long-term cycling stability (up to 350 h at 10 mA cm −2 ).
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Leiduo Lai,Peng Zhou,Hongyu Zhou,Minglu Sun,Yue Yuan,Yang Liu,Gang Yao,Bo Lai
Coupling dithionite (DNT) with FeVO 4 induced PMS activation (FeVO 4 /PMS/DNT) effectuates fast heterogeneous Fe(III) reduction to generate multitudinous reactive oxygen species (ROS) for fast degradation of carbamazepine (2.5 mg/L, >90 % degradation efficiency within 300 s) in batch mode. The Fe(III)/Fe(II) circulation propelled by DNT and reduced V species experiences two stages. DNT induces SO 2 − generation, which is a highly active species with strong reducibility for Fe and V reduction. The reduced V species donate electrons to ≡Fe(III) via Fe-O-V bond rather than directly react with PMS, implying introducing polyvalent V to modulate Fe-based materials intensifies DNT utilization and alleviates ROS quenching effects. Moreover, FeVO 4 crystalline form regains after reaction, and FeVO 4 /PMS/DNT system has an excellent reutilization and strong resistance to natural waters. Our discovery sheds new light on acceleration of heterogenous Fe(III)/Fe(II) circulation to promote Fenton-like oxidation , it may be a long-lasting strategy for water remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wenjuan He,Zuopeng Li,Shengchen Lv,Mingxin Niu,Wenfeng Zhou,Jing Li,Runhua Lu,Haixiang Gao,Canping Pan,Sanbing Zhang
The Fe 3 O 4 @MIL-100(Fe) hybrid composites are successfully synthesized via an in-situ growth method and characterized using various techniques. The ability of the magnetic metal–organic framework to promote photo-Fenton like processes is investigated using levofloxacin as a representative substrate. The results show that the composite with a Fe 3 O 4 :MIL-100(Fe) mass ratio of 1:4 has a higher degradation efficiency (up to 93.4%) than Fe 3 O 4 , MIL-100(Fe), and the other fabricated composites. This higher catalytic activity is ascribed to the synergistic effect between Fe 3 O 4 and MIL-100(Fe), by which the quick separation of hole-electron pair from MIL-100(Fe) and the efficient reduction of Fe 3+ to Fe 2+ in the photo-Fenton reaction are mutually promoted. Moreover, the composite shows favorable recyclability without apparent loss of apparent photo-Fenton activity even after five cycles, and more importantly, can be recovered magnetically. The possible degradation mechanism and intermediates of levofloxacin in the photo-Fenton reaction have been tentatively proposed based on free radical quenching, electron paramagnetic resonance and mass spectrometry analysis. Finally, the developed Fe 3 O 4 @MIL-100(Fe) is successfully applied for the removal of levofloxacin from spiked wastewater with removal efficiencies ranging from 77.9 to 85.5%, which indicates that the proposed system has significant potential for wastewater treatment applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Fangke Yu,Yi Wang,Hongrui Ma,Minghua Zhou
In this study, we demonstrated that hydrothermal synthesized FeS 2 was highly efficient to catalyze the H 2 O 2 decomposition for diclofenac sodium (DCF) degradation in a wide range of initial pH (3–9) by heterogeneous electro-Fenton (EF) process, and this “Pyrite-EF” showed a better performance for the mineralization of DCF in comparison with the classic EF process. Effect of pyrite content on the hydroxyl radicals generation and iron dissolution produced by the decomposition of hydrogen peroxide (H 2 O 2 ), and applied current density on the degradation kinetics and mineralization efficiency were studied. Moreover, toxicity assessment by means of microtox method showed the solution toxicity was removed after treatment. Experimental results revealed that the enhancement of DCF degradation rate in the Pyrite-EF process was attributed to the molecular oxygen activation induced by more surface bound ferrous ions on FeS 2 , generating superoxide anions to accelerate the Fe(II)/Fe(III) cycle on the FeS 2 surface, which favored the H 2 O 2 decomposition to generate more hydroxyl radicals for the DCF degradation via a heterogeneous EF-like process. These findings could provide some new insights into the molecular oxygen activation induced by FeS 2 and the subsequent heterogeneous Pyrite-EF degradation of organic pollutants from wastewater.
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高影响因子
FUEL
·
2020
·
IF 5.578
Limo He,Song Hu,Xiaofei Yin,Jun Xu,Hengda Han,Hanjian Li,Qiangqiang Ren,Sheng Su,Yi Wang,Jun Xiang
Fe-modified Ni/Al 2 O 3 catalysts with Fe/Ni molar ratios of 0, 0.5, 1 and 2 were prepared to promote the co-production of H 2 and carbon nanotubes (CNTs) during steam reforming of toluene as a tar model compound. After the addition of Fe, toluene conversion increased from 55.1% of Ni/Al 2 O 3 to 73.6% of F1N1A (Fe/Ni ratio of 1), and H 2 yield over F1N1A reached the maximum of more than 2000 mmol/(g-cata). Multi-walled carbon nanotubes with average diameter of 10–30 nm were generated and follow tip-growth mechanism. Compared with Ni/Al 2 O 3 , the addition of Fe remarkably increased the amount and quality of CNTs which had longer length and less tortuosity. These dual promoting effects on H 2 and CNTs after the addition of Fe were attributed to the strong interaction between Ni and Fe in Fe-Ni alloy. Fe-Ni alloy had the high activity for the decomposition performance of toluene and H 2 O to generate more H 2 and intermediates for improving the reforming reaction. Meanwhile, the high catalytic decomposition activity supplied more carbon species and the formation of Fe-Ni alloy enhanced the generation of metal carbide for promoting CNTs growth. Besides, the deposition of amorphous carbon was suppressed and the interaction between Ni particle and catalyst support was weakened after the addition of Fe, which kept the activity of catalyst and promoted the tip-growth of CNTs.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Hao Xu,Qian Ye,Qingguo Wang,Peng Zhou,Xiaowei Huo,Yunqi Wang,Xue Huang,Guanyu Zhou,Jing Zhang
Developing a low-cost and environmental friendly way to promote the Fe(III)/Fe(II) cycling is crucial to enhance the efficiency of Fenton reaction. In this study, g-C 3 N 4 was introduced into the Fe(III)/H 2 O 2 system as electron donor to accelerate Fe(III)/Fe(II) cycling and improve the degradation of organic pollutants under visible light. The g-C 3 N 4 /Fe(III)/H 2 O 2 /light system can achieve excellent degradation of different kinds of organic pollutants under low Fe(III) and H 2 O 2 dosages. The central composite design (CCD) and response surface methodology (RSM) were applied to evaluate the effects of g-C 3 N 4 dosage, Fe(III) dosage, H 2 O 2 dosage and light intensity on the DMP degradation efficiency. The mechanisms were investigated by quenching experiments and electron spin resonance (EPR) analyses that the photo-generated electrons and O 2 – were responsible to the Fe(III) reduction through interfacial and aqueous pathways, respectively. OH was the dominant reactive radical in the DMP degradation. Moreover, DMP degradation routes were proposed including the elimination of specific groups, the hydroxylation process and the ring-opening reactions. This study demonstrates an economical and green approach which provides a promising direction for the practical application of g-C 3 N 4 based photocatalysis by integrating it with the Fe(III)/H 2 O 2 Fenton process.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 26
·26394-26404
·
IF 2.8
Liu Yong,Lang Jie,Wang Ting,Jawad Ali,Wang Haibin,Khan Aimal,Chen Zhulei,Chen Zhuqi
Phenylurea herbicide residuals in soil may continuously contaminate surface water and groundwater due to unregulated and improper use. Herein, we reported a stable and active oxidation system including heterogeneous Fe-based layered double hydroxide materials as persulfate (PS) activators. Under mild conditions, 1% LDH in weight and 70 mM PS can completely degrade 500 mg/kg isoproturon in soil within 10 h, during which less than 0.1 ppm heavy metal leaching was detected. This remarkable performance was consistent in a broad pH range (3~11) and was resistant to various inorganic anions (Cl − , Br − , NO 3 − , HCO 3 − ) and humic acid. Mechanism studies from scavenging tests, EPR, and fluorescence spectra collectively proved that besides •OH and •SO 4 − , singlet oxygen ( 1 O 2 ) and superoxide (•O 2 − ) were also generated and were accounted for the oxidative degradation. This unique mechanism of generating diverse radicals was clearly distinguished from classic Fe(II)/PS system, significantly reduced the influence of varying parameters in water and soil matrix, and was suggestive to chemical oxidation system in soil remediation to avoid scavenging effects by background electrolytes or other components in water/soil matrix.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Caiyu Ge,Yuefan Wang,Yilin Wang,Zhifang Liu,Chao Chen,Yixi Xie,Pengcheng Zhao,Junjie Fei
As a natural flavonoid compound found in fruits, vegetables and herbs, luteolin (LU) has potent pharmacological activities and beneficial biological properties. Here, a Fe/Zn bimetallic ZIF pyrolysis-derived Fe-Fe 3 O 4 N-doped mesoporous carbon was in-situ grown on carbon nanofibers (Fe-Fe 3 O 4 -NPC@CNFs), and it was used as an ultrasensitive electrochemical sensing platform for the efficient detection of LU in natural samples. Multiple characterization results show that Fe-Fe 3 O 4 -NPC@CNFs is a dodecahedral particle uniformly grown on CNFs with good crystal structure and uniform elemental distribution. Its rough surface with good mesoporous structure and high specific surface area of 823.19 m 2 /g is beneficial for LU adsorption. The density of states (DOS) and adsorption energies of NPC and Fe-Fe 3 O 4 -NPC further demonstrate that Fe-Fe 3 O 4 -NPC has better electrochemical performance and adsorption effect on LU. Under optimized conditions (carbonization: 800℃, pH: 5.0, enrichment: −0.2 V for 400 s), the Fe-Fe 3 O 4 -NPC@CNFs/GCE sensor showed satisfactory detection performance for LU in the range of 0.001–1.5 μM with the limit of detection (LOD) of 0.47 nM. Furthermore, this sensor exhibits excellent anti-interference capability, reproducibility, and stability, and it was also possible to effectively detect LU in food samples. This work provides a new strategy for the quantitative analysis of LU in food.
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MATERIALS CHEMISTRY AND PHYSICS
·
2020
·
IF 3.408
Yanan Dong,Tianding Hu,Manoj Pudukudy,Hongying Su,Lihong Jiang,Shaoyun Shan,Qingming Jia
In this paper, the effect of conventional solvothermal and a microwave-assisted method for the synthesis of MIL-101(Fe) and NH 2 -MIL-101(Fe) as adsorbents for the removal of tetracycline in wastewater is reported for the first time. The results had shown that the microwave treatment led to a significant reduction in the material synthesis time, which greatly saved the energy. It was also found that the microwave-assisted synthesized material exhibited small particle size, high specific surface area and better adsorption capacity. The introduction of amino group further enhanced the adsorption capacity of MIL-101(Fe). The adsorption capacity of MIL-101(Fe) and NH 2 -MIL-101(Fe) samples for tetracycline adsorption by microwave assisted synthesis method reached up to 332 mg/g and 378 mg/g, respectively. Moreover, the adsorption isotherm was well-fit with Freundlich model, indicating a multilayer adsorption . The kinetic studies indicated that the reaction followed pseudo second-order reaction kinetics with a best fit to the theoretical value. Due to the higher adsorption efficiency and lower energy consumption of the synthesis, the as-prepared microwave assisted materials could be used as potential adsorbents for different pollutants in wastewater.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiangnan Xu,Xiu Luo,Weiwei Su,Guorong Jia,Huawei Cai,Danni Li,Rou Li,Xiangdong Wang,Yefa Yang,Tao Wang,Changjing Zuo
Transarterial radioembolization (TARE) is a primary palliative treatment for advanced liver cancer. Nonetheless, its therapeutic efficacy is frequently hindered by resistance to tumor cell apoptosis induced by inter-radiotherapy. Induction of multiple cell death modalities provides a potential solution to this challenge. Ferroptosis, a distinct form of cell death from apoptosis, is dependent on the intracellular Fe2+-mediated Fenton reaction for the production of hydroxyl radicals (·OH) and is gaining recognition as a promising approach for cancer treatment. In this study, we synthesized a therapeutic radionuclide iodine-131 (131I)-based TARE agent by combining 131I-labeled iron-based MIL-88B(Fe) nanoparticles (NPs) (abbreviated as 131I-MIL-88B(Fe)) with Lipiodol to achieve a combined apoptosis–ferroptosis tumor therapy. Specifically, a mixture of Lipiodol and 131I-MIL-88B(Fe) NPs was injected into the liver tumors through the hepatic artery. Lipiodol blocks the arterial blood supply of the tumor, causing tumor tissue necrosis, whereas 131I inter-radiotherapy damages deoxyribonucleic acid (DNA) through direct action or indirectly via the production of ·OH through H2O radiolysis, leading to tumor cell apoptosis. Importantly, hydrated electrons (eaq–), a byproduct of H2O radiolysis, promoted the conversion of Fe3+ to Fe2+ in MIL-88B(Fe) NPs, enhancing the efficacy of the Fenton reaction and triggering ferroptosis. In vitro experiments demonstrated that compared to 131I alone, 131I-MIL-88B(Fe) NPs significantly enhanced ferroptosis-mediated tumor cell death due to 131I-induced Fe2+ production, which increased catalytic activity in the Fenton reaction. In a rat model bearing orthotopic N1S1 liver tumors, TARE with Lipiodol and 131I-MIL-88B(Fe) NPs induced tumor cell necrosis, apoptosis, and ferroptosis, resulting in improved therapeutic outcomes. This study leverages eaq– to facilitate Fe3+/Fe2+ conversion for efficient ferroptosis, turning waste into a valuable resource. This demonstrated the innovative integration of multiple treatment strategies to augment the efficacy of TARE in liver cancer therapy.
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PubMed
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 21
·e73559
·
IF 2.3
Xin Long,Shijie Zhou,Dong Liang,Mingdong Zhou,Liwei Sun,Yuehui Li
Room-temperature plasma-assisted catalysis represents an important pathway for CO 2 valorization. Rational design of catalysts tailored to plasma environment holds significant potential for improving catalytic efficiency. Unprecedentedly, we report a coordination-engineering strategy to fabricate the Fe/Cu mix-metal organic framework (Fe/Cu-MOF) catalysts for plasma-driven CO 2 dissociation into CO. Precise modulation during synthesis revealed an optimal Fe:Cu ratio of 0.44:0.56 to generating synergistic active sites favorable for CO production. The in situ-formed FeCu-based catalyst exhibited exceptionally high CO space-time yield of 32.3 mmol·gcat-1·h-1 under room-temperature plasma conditions. The coordination-tailored electronic structure enables the dynamic variations in the oxidation states of Fe/Cu upon plasma activation, thus facilitating sustained CO 2 activation. This work establishes atomic-level control of bimetallic sites as a powerful paradigm for plasma-catalytic systems. Graphical For the first time, Fe-Cu bimetallic metal-organic frameworks (MOFs) synthesized via a one‑pot solvothermal method were used for efficient decomposition of CO 2 into CO with excellent stability under nonthermal plasma (NTP). This integrated approach offers fundamental insights and technical support for the development of robust catalysts under plasma conditions.
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