INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 20
·12579
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IF 6.208
Xiaoxin Chen,Jiacheng Lin,Yingjie Su,Shanshan Tang
In this study, a magnetic biochar with a unique 3D network structure was synthesized by using a simple and controllable method. In brief, the microbial filamentous fungusTrichoderma reeseiwas used as a template, and Fe3+was added to the culture process, which resulted in uniform recombination through the bio-assembly property of fungal hyphae. Finally, magnetic biochar (BMFH/Fe3O4) was synthesized by controlling different heating conditions in a high temperature process. The adsorption and Fenton-like catalytic performance of BMFH/Fe3O4were investigated by using the synthetic dye malachite green (MG) and the antibiotic tetracycline hydrochloride (TH) as organic pollutant models. The results showed that the adsorption capacity of BMFH/Fe3O4for MG and TH was 158.2 and 171.26 mg/g, respectively, which was higher than that of most biochar adsorbents, and the Fenton-like catalytic degradation effect of organic pollutants was also better than that of most catalysts. This study provides a magnetic biochar with excellent performance, but more importantly, the method used can be effective in further improving the performance of biochar for better control of organic pollutants.Keywords:water;biochar;organic pollutants;adsorption;Fenton-like catalysis
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
·
IF 9.446
Tianyuan Xu,Runliang Zhu,Gangqiang Zhu,Jianxi Zhu,Xiaoliang Liang,Yanping Zhu,Hongping He
Heterogeneous photo-Fenton catalysts generally show very weak photo-Fenton activity at near-neutral pH because of the relatively low rate of Fe 2+ regeneration. The aim of this work is to develop novel heterogeneous photo-Fenton catalysts, which can accelerate the regeneration of Fe 2+ and thus have superior photo-Fenton activity at near-neutral pH. In this study, ferrihydrite (Fh) was modified with BiVO 4 to synthesize BiVO 4 /Fh composites, and we expected that the photogenerated electrons from BiVO 4 would accelerate the regeneration of Fe 2+ on Fh. Mechanistic investigation of H 2 O 2 consumption showed that the introduction of BiVO 4 promoted the decomposition of H 2 O 2 into reactive oxygen species (ROS). In addition, the presence of BiVO 4 deterred O 2 − production and accelerated the formation of OH, according to the results of ROS formation, as shown with EPR spectroscopy and fluorescent probes tools. Furthermore, the Fe 2+ concentration on the surface of BiVO 4 /Fh was higher than that on Fh based on the results of XPS characterization and quantitative measurement with a 1,10-phenanthroline spectrophotometric method. These results demonstrated that the introduction of BiVO 4 can accelerate the reduction of Fe 3+ to Fe 2+ by transferring photogenerated electrons from BiVO 4 to Fe 3+ on the surface of Fh. Meanwhile, a higher decolorization efficiency of acid red 18 by BiVO 4 /Fh than by Fh and pure BiVO 4 verified that the introduction of BiVO 4 can significantly enhance the photo-Fenton catalytic activity of Fh even at near-neutral pH. Overall, our work has important implications for understanding the photo-Fenton mechanisms on semiconductor modified heterogeneous photo-Fenton catalysts and confirms that the introduction of a semiconductor can enhance the photo-Fenton catalytic activity of heterogeneous photo-Fenton catalysts in acidic and neutral pH.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2019
·Vol. 91
·期 1
·54-62
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IF 1.986
Deng Senlin,Zhang Xubin,Lv Guojun,Zhai Yi,Yang Zebin,Zhu Yongqiang,Li Haichao,Wang Fumin
Fe-doped zeolites with Mobil Five (MFI) structure have been widely used as heterogeneous Fenton catalysts to eliminate dyes from wastewater. However, the influence of carriers on degradation efficiency has not been reported yet. In this work, we have prepared three Fe-doped zeolite catalysts, FeS-1, FeZSM-5, and FeTS-1, with silicalite-1 (S-1), zeolite socony mobil-5 (ZSM-5), and titanium silicalite-1 (TS-1) as carriers, respectively. Characterizations, such as X-ray diffraction (XRD), scanning electron microscopy, energy-disperse X-ray spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflection spectroscopy (UV–Vis DRS), X-ray fluorescence spectrometer, zeta potential, and N 2 adsorption/desorption isotherms, were used to investigate the morphologies and physicochemical properties of the synthesized materials. The catalytic performances of all zeolite catalysts were evaluated in the degradation experiments. The results depicted that the degradation efficiency of FeZSM-5 was higher than that of FeS-1 and FeTS-1 owing to its higher hydrophilic property, larger external specific surface area, and more negative zeta potential value. Therefore, the ZSM-5 could be a more suitable solid matrix for heterogeneous Fenton reactions than S-1 and TS-1.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Tao Huang,Jundong Zhu,Shengzhuo Ge,Tianyu Guo,Chongwen Jiang,Le Xie
Heterogeneous photo-Fenton reaction using BiFeO 3 as catalyst was considered as an efficient environmental remediation technique. However, its low catalytic performance limited its application. In this work, CdSe QDs with high electron mobility, small size effect and rich surface properties were loaded on BFO surface by stirring impregnation method. The photo-Fenton catalytic performance of catalysts under visible light irradiation was evaluated by the degradation of phenol. The results showed that the BFO with CdSe QDs uniformly distributed on the surface shows much better photo-Fenton degradation of phenol performance than that of pure BFO. Moreover, when the load content of CdSe QDs comes to 0.5 wt%, the degradation efficiency of phenol increased from 41.5% to 98.5% within 60 min. The results of photochemical experiments confirmed that composite catalyst had a good ability to separate photo-induced carriers and the experiments of free radicals trapping showed that the holes and OH radicals were important active substances. Based on the above research, the possible mechanism of photo-Fenton reaction of catalyst was expounded. Excellent photo-Fenton catalytic performance and superior stability make this material showing a good application prospect for the degradation of organic pollutants in wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Guangyu Wu,Shiyu Bian,Jingyi Wang,Fan Wu,Wenting Sun,Yuwei Pan,Chunyu Zhao,Weinan Xing,Yudong Huang
Constructing advanced photo-Fenton catalyst provides an effective strategy to improve photogenerated charge separation for catalytic removal of organic contaminants, however it faces challenges in efficient morphology control and recovery methods. Biochar has become a promising material on account of its high efficiency and adjustable physicochemical properties. For the purpose of enhancing the economic applicability of biochar catalysts, a series of the biochar modified multi-morphologies Fe 2 O 3 photo-Fenton catalysts (Fe 2 O 3 /BC) were prepared for efficient removal tetracycline (TC) in this work. The obtained characterization results revealed that the adoption of biochar can avoid the agglomeration of Fe 2 O 3 nanoparticles and obtained the Nanosheet-, Cube- and Ring-like photo-Fenton catalysts, respectively. The Nanosheet-like Fe 2 O 3 /BC displayed the highest TC removal of 97.0 % within 80 min, which the degradation rate constant was approximately 3 and 18 times those of Cube-like Fe 2 O 3 /BC and Ring-like Fe 2 O 3 /BC photo-Fenton catalysts. The photocurrent signal density was in the order of Nanosheet-like Fe 2 O 3 /BC>Cube-like Fe 2 O 3 /BC>Ring-like Fe 2 O 3 /BC, while the semicircle radius of electrochemical impedance spectroscopy (EIS) results in the order of Nanosheet-like Fe 2 O 3 /BC
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiaqiao Yuan,Hongyu Lu,Xiang Gong,Mingjun Chen,Hao Lai,Shuming Wen,Shaojun Bai,Dandan Wu
The development of high-efficiency beneficiation processes for ilmenite has garnered widespread attention. This study proposed the utilize of a heterogeneous Fenton catalytic technology involving H 2 O 2 and Fe 2+ to enhance ilmenite flotation. The flotation results indicated that pre-oxidation of ilmenite with H 2 O 2 -Fe 2+ before adding collector could recover over 80 % of ilmenite from titanaugite. Electron Paramagnetic Resonance and slurry iron component concentration analyses revealed that the •OH generated within the ilmenite-H 2 O 2 -Fe 2+ catalytic system could oxidize Fe 2+ to Fe 3+ . The stronger binding capability of Fe 3+ with NaOL led to a remarkable discrepancy in floatability between ilmenite and titanaugite. Zeta potential analysis further confirmed that the oxidation degree of the ilmenite surface and the adsorption of iron species were higher than those of titanaugite. Additionally, Time-of-Flight Secondary Ion Mass Spectrometry and X-ray photoelectron spectroscopy analyses provided evidence for the selective activation of ilmenite by the H 2 O 2 -Fe 2+ . Furthermore, Density Functional Theory calculations revealed that the stable adsorption of Fe 2+ and Fe(OH) 2 + offered additional active sites on the ilmenite surface for NaOL adsorption. Moreover, the adsorption of •OH significantly affected the electronic spin density of the Fe 3d orbitals of Fe atom in ilmenite, and played a crucial positive in the surface activity of ilmenite.
研究领域:
矿物加工工程
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
FERROELECTRICS
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2022
·
IF 0.695
Qiang Shen,Songyuan Mao,Yubin Zhou,Yuheng Xie,Peisong Tang
Fe3+ modified bentonite was firstly prepared by ion change method and Fe2+ modified bentonite was then synthesized by reduction of Fe3+-bentonite. The modified bentonites were characterized with XRD and SEM. The adsorption ability of Tetracycline (TC) of Fe3+-bentonite and Fe2+-bentonite was compared with raw bentonite. The catalytic activity of two Fe-bentonites used as heterogeneous Fenton catalyst are also examined. The resulted shows that both of Fe3+-bentonite and Fe2+-bentonite exhibited superior removal performance of TC. The removal capacities of Fe3+-bentonite and Fe2+-bentonite in the 400 mg/L TC solution reached 98.15% and 96.55%, respectively. The Fe3+-bentonite and Fe2+-bentonite remains 75% removal abilities after 3 rounds under Fenton condition. The mechanisms of adsorption and Fenton degradation of Fe modified bentonite were also discussed.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 1
·913-926
·
IF 3.553
Du Zoufei,Liu Fei,Xiao Changfa,Dan Yi,Jiang Long
Developing a reusable and durable catalyst for heterogeneous photo-Fenton process is of great importance for the practical application in the environment remediation. In this study, poly(vinyl alcohol) (PVA)/sodium alginate (SA) hydrogel beads were constructed using FeCl 3 and boric acid as cross-linking agents. Characterizations and tests were employed to investigate the structure, optical property and durability of the obtained beads. The photo-Fenton performance of the PVA/SA-FeCl 3 beads was evaluated by degradation of tetracycline (TC) under visible-light irradiation. The results show that the constructed beads exhibit porous structure, display a broad absorption band in the visible region and behave excellent stability against mechanic effects. The photocatalytic experiment result indicates that the removal rate of TC reaches 90.5% under optimized conditions, while the removal rate of total organic carbon reaches 28.6%. By analyzing the degradation of TC after adding active species scavengers, a photocatalytic mechanism was proposed. Moreover, PVA/SA-6% FeCl 3 beads could be easily separated and recycled in water purification. This work provides a facile and robust method to construct reusable and durable Fe(III)-containing hydrogel beads with acceptable photo-Fenton catalytic performance under visible-light irradiation, paving the way for its practical application in wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Juan Zhai,Zihan Li,Hengyang Mao,Xiuyang Zou,Shouyong Zhou,Meisheng Li,Minghui Qiu,Yan Zhang,Shanshan Xia,Yijiang Zhao
The surge in oil-in-water (O/W) emulsions poses a threat to the ecological environment. Membrane separation technology can achieve complete O/W emulsion separation through size sieving; however, its efficiency is limited by membrane fouling. In this study, an efficient O/W separation membrane with passive and positive anti-fouling properties was fabricated using Fe 3 O 4 functionalized attapulgite (ATP) nanofibers. The anti-fouling mechanism of the multifunctional membranes for the separation of various O/W emulsions was studied. During separation process, a hydration layer, which mitigates oil adhesion with binding energy as low as −169 kcal·mol −1 , forms on the interface of Fe 3 O 4 -ATP. When a cationic surfactant is present, positively charged oil droplets are attracted to the membrane surface, where they compress against each other, leading to demulsification and escape. Synergistic effects including electrostatic shielding, interaction energy, and steric hindrance were demonstrated through characterization and simulation. Our findings showed that the membrane exhibited a high filtration efficiency with an oil rejection of over 99 % and a steady flux of over 73 % of its initial value. After filtration, oil fouling degraded into smaller sizes and escaped from the membrane structure through the Fenton-like catalytic function of Fe 3 O 4 , resulting in a flux recovery ratio of up to 90 %. This study provides a reference for the construction of multifunctional membranes for efficient separation processes and advancing anti-fouling research on membrane interfaces.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Tianyu Gao,Weixiao Sun,Haiyong Wang,Jing Zhang,Zhen Yan,Martine Trentesaux,Maya Marinova,Chenguang Wang,Vitaly Ordomsky,Sébastien Paul
Styrene oxide is an important intermediate in many chemical syntheses. It can be produced through the epoxidation of styrene using supported metal catalysts. However, the catalytic performance and stability of these catalysts are negatively affected by the mass transfer, diffusional limitations and leaching of metals from supports. In this work, a hydroxyl-substituted bidentate 2D Schiff-base COF supported Fe 3 O 4 particles catalyst (Fe-COF) is developed for styrene epoxidation using H 2 O 2 as oxidant. Fe-COF catalyst possesses an eclipsed layered-sheet structure with a uniform distribution of Fe 3 O 4 particles. Supported Fe 3 O 4 particles as the active sites are responsible for the adsorption of styrene and generation of reactive oxygen radicals through the Fenton process. The presence of the extensive π-electron delocalization effect over COF support facilitates the electron transfer between Fe 2+ and Fe 3+ sites on Fe-COF catalyst during the reaction, accelerating the Fenton process, thus Fe-COF catalyst even shows a higher catalytic activity (86.0 % conversion of styrene and 88.0 % selectivity to styrene oxide) compared with homogeneous Fenton catalyst (Fe(NO 3 ) 3 ). In addition, Fe-COF catalyst demonstrates good stability after 5 recycles without Fe leaching, due to the coordination of Fe 3 O 4 particles with the imine and hydroxyl groups in COF support.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 16
·23924-23941
·
IF 0
Li Kaiqian,Zhang Xupeng,Huang Xueqin,Li Xianghong,Chang Qiaowen,Wang Jing,Deng Shuduan,Zhu Gang
In response to the escalating concerns over antibiotics in aquatic environments, the photo-Fenton reaction has been spotlighted as a promising approach to address this issue. Herein, a novel heterogeneous photo-Fenton catalyst (Fe 3 O 4 /WPC) with magnetic recyclability was synthesized through a facile two-step process that included in situ growth and subsequent carbonization treatment. This catalyst was utilized to expedite the photocatalytic decomposition of ciprofloxacin (CIP) assisted by H 2 O 2 . Characterization results indicated the successful anchoring of MIL-101(Fe)-derived spindle-like Fe 3 O 4 particles in the multi-channeled wood-converted porous carbon (WPC) scaffold. The as-synthesized hybrid photocatalysts, boasting a substantial specific surface area of 414.90 m 2 ·g −1 and an excellent photocurrent density of 0.79 μA·cm −2 , demonstrated superior photo-Fenton activity, accomplishing approximately 100% degradation of CIP within 120 min of ultraviolet-light exposure. This can be attributed to the existence of a heterojunction between Fe 3 O 4 and WPC substrate that promotes the migration and enhances the efficient separation of photogenerated electron–hole pairs. Meanwhile, the Fe(III)/Fe(II) redox circulation and mesoporous wood carbon in the catalyst synergistically enhance the utilization of H 2 O and accelerate the formation of •OH radicals, leading to heightened degradation efficiency of CIP. Experiments utilizing chemical trapping techniques have demonstrated that •OH radicals are instrumental in the CIP degradation process. Furthermore, the study on reusability indicated that the efficiency in removing CIP remained at 89.5% even through five successive cycles, indicating the structural stability and excellent recyclability of Fe 3 O 4 /WPC. This research presented a novel pathway for designing magnetically reusable MOFs/wood-derived composites as photo-Fenton catalysts for actual wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
MATERIALS RESEARCH BULLETIN
·
2012
·
IF 2.105
Jingheng Deng,Xianghua Wen,Qinian Wang
Fe 3 O 4 -multi-walled carbon nanotubes (Fe 3 O 4 -MWCNTs) hybrid materials were synthesized by a solvothermal process using acid treated MWCNTs and iron acetylacetonate in a mixed solution of ethylene glycol and ultrapure water. The materials were characterized using X-ray powder diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and vibrating sample magnetometry. The results showed that a small amount of water in the synthesis system played a role in controlling crystal phase formation, size of Fe 3 O 4 , and the homogeneous distribution of the Fe 3 O 4 nanoparticles deposited on the MWCNTs. The Fe 3 O 4 nanoparticles had diameters in the range of 4.2–10.0 nm. They displayed good superparamagnetism at room temperature and their magnetization was influenced by the reaction conditions. They were used as a Fenton-like catalyst to decompose Acid Orange II and displayed a higher activity than nanometer-size Fe 3 O 4 .
研究领域:
材料科学
·
环境科学
✓ 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）