INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuhang Wei,Weiwei Xie,Xinyue Wang,Qingyang Chong,Song Li,Zhiming Chen
The degradation of synthetic dye wastewater is important for green chemistry and cost-effectiveness. In this study, we developed Fe 3 O 4 @C-laccase (laccase immobilized on Fe 3 O 4 @C nanoparticles) for photothermal degradation of high concentration of triphenylmethane dye wastewater. The Fe 3 O 4 @C-laccase possessed superior pH and thermal stabilities, as well as excellent tolerance to organic solvents, inhibitors, and metal ions. Laccase activity assays revealed that the activity recovery was approximately 118.2 %. Furthermore, the Fe 3 O 4 @C-laccase presented rapid and sustainable photothermal degradation capabilities to triphenylmethane dye wastewater. The initial removal efficiencies of 400 mg/L malachite green (MG), 400 mg/L brilliant green (BG), 100 mg/L crystal violet (CV), and 600 mg/L mixed dye (MG:BG:CV = 1:1:1) wastewater were approximately 99.8 %, 99.9 %, 96.4 % and 99.2 % by 60 min treatment, respectively. After undergoing 10 batches of reuse, the photothermal degradation efficiencies of the triphenylmethane dye wastewater remained consistently high, at about 99.3 %, 97.4 %, 94.0 %, and 95.1 %, respectively. The excellent photothermal degradation properties indicate that the Fe 3 O 4 @C-laccase holds promise for addressing high concentration of textile wastewater in various applications.
研究领域:
环境科学
·
生物技术
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materiomics
·
2022
·
IF 8.589
Li Wang,Zhang Chen,Xue Wang,Liying Zhang,Zongtao Zhang,Qi Zhao,Yanfeng Gao
Low-frequency microwave absorbing materials have been challenging for many years. Three-dimensional dielectric/magnetic porous materials are beneficial for improving the low-frequency microwave absorbing performance because of natural resonance and improved impedance matching. In this study, Fe 3 O 4 @C 3D foam was prepared by carbothermal reduction method and the microwave attenuation performances and mechanisms were studied. By adjusting the content of Fe 3 O 4 @C 3D foam in paraffin composites, the low-frequency microwave attenuation capacity could be effectively optimized. The minimum reflection loss (RL min ) of paraffin composite with 40% (in mass fraction) loading exhibits −54.7 dB at 4.1 GHz for a thickness of 4.0 mm. Surprisingly, the paraffin composite with 50% (in mass fraction) loading could almost cover 2–4 GHz (S-band) in the thickness range of 3.5–5.5 mm. The strong low-frequency microwave attenuation property of Fe 3 O 4 @C 3D foam is mainly attributed to excellent low-frequency impedance matching, natural resonance, interfacial/dipole polarization, multiple reflection and scattering. This method provides a new perspective for preparing lightweight and high performance low-frequency microwave absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 2
·478-486
·
IF 3.069
Feng Li,Shanshan Jiang,Jin Huang,Yue Wang,Shiyu Lu,Cuiqin Li
Carbon-encapsulated Fe3O4 (Fe3O4@C) catalysts were prepared by a solvothermal method using glucose as the carbon source and their physicochemical properties were characterized via various analytical techniques. Catalytic transfer hydrogenation of furfural over Fe3O4@C catalysts was investigated with isopropanol as the solvent and hydrogen donor. The Fe3O4@C catalysts exhibited high catalytic furfural transfer hydrogenation activity, selectivity of furfuryl alcohol, and high reusability. The mechanism of catalytic transfer hydrogenation of furfural by Fe3O4@C obeys the Meerwein–Ponndorf–Verley reduction on a Lewis acid site (Fe3O4).
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 43
·18339-18344
·
IF 0
Zhiming Chen,Wenhui Xu,Li Jin,Juanjuan Zha,Tingxian Tao,Ying Lin,Zhilin Wang
Amine-functionalized Fe3O4@C nanoparticles have been successfully synthesized on a large scale via a solvothermal route. The morphology, structure and properties of the Fe3O4@C nanoparticles were investigated through different analytical tools. Due to the magnetic nature and the presence of amine-functionalized groups, the as-prepared Fe3O4@C nanoparticles were employed as magnetic carriers for lipase immobilization. Our results indicate that the lipase loading amount on the magnetic Fe3O4@C nanoparticles was about 115.6 mg of protein per g. The factors related to the catalytic activity of the immobilized lipase on the magnetic carriers were systematically investigated. Hydrolytic activity tests reveal that the immobilized lipase retains about 93% of the free enzyme activity. It should be mentioned that the thermal stability of the immobilized lipase was strikingly higher than that of the free lipase. Most importantly, the immobilized lipase retained more than 68% of its initial activities after 10 times reuse. It is hoped that the amine-functionalized Fe3O4@C nanoparticles may find an application in biotechnology and catalysis.
研究领域:
生物技术
·
催化科学
✓ 已验证
产品关联
DOI
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Linglin Zhou,Guilong Zhang,Jie Tian,Dongfang Wang,Dongqing Cai,Zhengyan Wu
Core–shell magnetic Fe3O4@C nanospheres functionalized with active chemical groups were synthesized via a one-step template-free solvothermal process and employed to remove hexavalent chromium (Cr(VI)) in aqueous media. The structure of Fe3O4@C nanoparticles could be effectively adjusted by the concentration of precursor. The Fe3O4 core possessed a high magnetism for the convenient separation of Fe3O4@C from aqueous solution, and high porosity and abundant functional groups (−OH, −COOH, and C═C) of carbon layer contributed to a superior performance on Cr(VI) removal. Therein, Cr(VI) ions could be efficiently adsorbed into the carbon layer and reduced to trivalent chromium (Cr(III)) mainly by C═C, and the resulting Cr(III) were chelated by the −COOH group. Noteworthy, the carbon layer thickness, pore size, and amount of chemical groups significantly increased with the increase of Fe3O4@C particle size resulting in a rising removal efficiency on Cr(VI). This study provides a promising approach for removing Cr(VI) and may have a huge application potential.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2020
·Vol. 96
·期 3
·639-649
·
IF 2.75
Shanshan Jiang,Jin Huang,Yue Wang,Shiyu Lu,Pei Li,Cuiqin Li,Feng Li
Abstact BACKGROUND Fe based metal organic frameworks (Fe-MOFs) were prepared by solvothermal method, and carbon loaded Fe 3 O 4 (Fe 3 O 4 /C) was prepared by pyrolytic carbonization and carbothermal reduction. RESULTS Various analytical techniques were used to characterize the physicochemical structure of Fe-MOFs and Fe 3 O 4 /C under different solvothermal and calcination conditions. Fe 3 O 4 /C was then employed as a catalyst for the catalytic transfer hydrogenation of furfural with alcohol as a hydrogen donor, and the effect of hydrogen donor species, reaction temperature, and reaction time were investigated. CONCLUSION The Fe 3 O 4 /C catalyst could be easily collected with a magnet and reused for four runs without significant loss of its catalytic. A possible mechanism for the catalytic transfer hydrogenation of furfural over Fe 3 O 4 /C was proposed. © 2020 Society of Chemical Industry (SCI)
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
You Zhou,Lei Xu,Sheng-Jie Han,Cai-Hua Liu,Yi-Bin Li,Ming-Lai Fu,Baoling Yuan
Solar-driven interfacial photothermal evaporation (SIPE) has been considered as a green and sustainable technology for obtaining fresh water, and the exploring efficient photothermal materials is crucial. Nanocomposite derived from metal-organic framework exhibits high light absorption properties and excellent chemical stability, making it an ideal candidate in the SIPE. Herein, Fe 3 O 4 /C nanocomposite was obtained using MIL-101 (Fe) as a precursor, and Fe 3 O 4 /C-based porous hydrogel (Fe 3 O 4 /C-PH) was subsequently prepared through chemical crosslinking foaming polymerization. The obtained Fe 3 O 4 /C-PH exhibited an evaporation rate of 3.33 kg m −2 h −1 under one sun intensity. Fe 3 O 4 /C-PH demonstrated outstanding desalination and salting out resistance when treating real seawater. Moreover, it could remove over 99 % of dyes from wastewater. The photothermal mechanisms are molecular thermal vibration of C component and semiconductor relaxation of Fe 3 O 4 . Meanwhile, the hydrophilic and porous skeleton structure of the hydrogel ensure Fe 3 O 4 /C-PH to transport water rapidly and exhibit good light absorption properties. This research broadens the candidate of photothermal materials for applications in SIPE, and also provides new avenues for desalination and wastewater purification.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Yunfei He,Yanan Liu,Xu Yan,Guangyu Qin,Yuhao Liu,Bo Zhong,Long Xia,Dongdong Liu,Yu Zhou,Xiaoxiao Huang
Due to the seriousness of the electromagnetic pollution, it is urgent to develop high-efficiency broadband electromagnetic wave absorption (EMA) materials. As a traditional EMA material, the question of expanding absorption bandwidth for Fe 3 O 4 /C composite need to be addressed. Based on this consideration, rationally designed Fe 3 O 4 /C nano-composite with the regular mesoscopic (1–100 nm) arrangement structure has practical significance. Benefited from this unique structure, the obtained Fe 3 O 4 /C mesoscopic ordered nano-composite exhibits broadband absorbing characteristics in 2–12 GHz. The effective absorption bandwidth value of the material is 6.40 GHz at low frequency (covered C band) and the minimum reflection loss is −50.47 dB. The superior broadband is derived from the good whole-test-frequency impedance matching and the strong low-frequency magnetic loss, which is achieved by the regularly mesoscopic arrangement of the magnetic nanoparticles . This study will provide certain inspirations and guidance for the design of low frequency broadband EMA materials in the future.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 3
·2769-2774
·
IF 1.798
Yu Qi,Chen Hanlin,Chen Ping,Wang Qi,Lu Chun,Jia Caixia
Carbon nanofibers containing Fe 3 O 4 nanoparticles (Fe 3 O 4 @C nanofibers) were synthesized by electrospinning technique followed by heat treatment, and then the as-prepared nanofibers were loaded in bismaleimide (BMI) resin to prepare nanocomposites. The phase structure and morphology of nanofibers were characterized by X-ray diffraction and scanning electron microscope, respectively. The complex permittivity and permeability of nanocomposites were measured by vector network analyzer using a coaxial line method in the frequency range of 1–18 GHz, and the microwave absorption performance was accordingly evaluated. The results indicated that the Fe 3 O 4 @C nanofibers/BMI composites showed excellent low-frequency electromagnetic wave absorption properties with a minimum RL value of −22 dB at 2.1 GHz corresponding to a thickness of 6 mm and exceeding −10 dB with thickness of 3–6 mm in the whole S band (2–4 GHz). The strong absorption in low frequency is attributed to good matching characteristics of dielectric loss and magnetic loss, which can be efficiently tailored by combination of magnetic Fe 3 O 4 and dielectric carbon layer through electrospining technology. The novel Fe 3 O 4 @C nanofibers loaded in BMI resin can provide an effective solution for pressing problem in present that how to produce lightweight microwave absorbing nanocomposites with excellent low-frequency electromagnetic absorption properties.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 27
·4726-4731
·
IF 4.872
Yuling Yang,Genxing Zhu,Guangchuan Wang,Yali Li,Ruikang Tang
Biomolecules, especially enzymes, usually have poor thermal and operational stability as well as limited reuse cycles, which greatly limit their industrial practices. Inspired by the biomineralization strategy evolved by natural organisms, we suggest nanohybrid enzyme formulation by in situ encapsulating enzyme loaded functional Fe3O4@C nanoparticles with silica. By using glucose oxidase (GOD) as an example, we demonstrate that the obtained enzyme-material hybrids are featured by their significantly enhanced operational and thermal stabilities, which exhibit a relatively steady catalytic ability in a board range of 25 °C to 65 °C. Even after 4 h of incubation at 55 °C, the GOD-material composites still retain 77% of their initial activity while the native ones only retain 30%. Besides, the nanohybrids show excellent reusability because the magnetic character of the integrated Fe3O4 particles facilitates the enzyme separation and recycle. This attempt provides a valuable approach for biological improvement by using functional materials.
研究领域:
生物化学
·
材料科学
·
酶工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POWDER TECHNOLOGY
·
2024
·
IF 4.5
Mingci Hu,Shan Qing,Xiaohui Zhang,Hao Zhang,Zichang Shi
Instability is a key issue that limits the application of magnetic nanofluids. In this study, Fe 3 O 4 @C nanoparticles were obtained using a carbon layer coated with a ferromagnetic material, which improved the instability of the magnetic nanofluid while obtaining higher thermal conductivity and showed excellent photothermal conversion performance in photothermal conversion experiments. Firstly, we prepared Fe 3 O 4 @C nanoparticles via the solvothermal method. We then compared different sizes of Fe 3 O 4 @C nanoparticles in terms of structure, composition, heat transfer characteristics and photothermal efficiency. The results indicate that contrary to the conventional belief that smaller nanoparticles have higher thermal conductivity, the 90.30 nm Fe 3 O 4 @C nanofluids has better thermal conductivity than 58.17 nm due to its larger proportion of carbon shells. In the photothermal conversion experiment for DASCs, the 58.17 nm group performed best, with the temperature of the 0.2 wt% sample reaching 45.80 °C and a photothermal efficiency of 60.32%.
研究领域:
材料科学
·
热物理学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Liu Cui,Ziwei Bai,Ziqi Li,Zhaoyun Liu,Huanhuan Ma,Xiaoxu Chen,Kui Lin,Jia Hao,Yuanlu Cui,Fei Tian
Photocatalytic process using core–shell nano-catalyst is an efficient, eco-friendly, and cost-effective process for removal or minimize hazard of pollutants in waste water. Herein, a recyclable and robust Cu 2 O/Fe 3 O 4 @C/Cu core–shell nanocomposite with photocatalyst activities is designed based on the synergistic photocatalytic activities of Cu 2 O and Cu and the magnetic property and stability of Fe 3 O 4 @C. The Cu 2 O/Fe 3 O 4 @C/Cu is shown to act as nano-catalyst to almost completely convert 4-Nitrophenol (4-NP) to 4-aminophenol (4-AP) within 3 min by sufficient electrons in the electron-rich region formed under ultraviolet light irradiation. The Cu 2 O/Fe 3 O 4 @C/Cu nanocomposite shows a good stability, reusability and magnetic separation ability after five recycles. In addition, a photocatalytic mechanism of 4-NP reduction over this nanocomposite is proposed, and the roles of each nanocomponent of this nanostructure played in the synergistic enhancing photocatalytic performance via cascade reaction is demonstrated. This work suggests that Cu 2 O/Fe 3 O 4 @C/Cu nanocomposite with high activity, good stability and magnetically recyclability could be applied for the elimination of pollutants in wastewater.
研究领域:
环境科学
·
材料科学
✓ 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）