BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Haifeng Zhuang,Hao Zhu,Jin Zhang,Shengdao Shan,Chengran Fang,Haojie Tang,Qiaona Xie
Fe 3 O 4 supported on water hyacinth biochar (Fe 3 O 4 /WHB) was successfully used in anaerobic degradation of 2,4,6-trichlorophenol and coal gasification wastewater (CGW). Chemical oxygen demand removal efficiency and methane production were significantly improved to 98.9% and 2.0 L with Fe 3 O 4 /WHB assisted. Fe 3 O 4 /WHB facilitated the conversion of CO 2 to methane and reduce H 2 production. A higher coenzyme F 420 concentration of 1.32 μmol/(g-mixed liquor volatile suspended solids) was found with the presence of Fe 3 O 4 /WHB, which might result in a faster conversion of acetate to methane. More interspecific signal molecules, lower diffusible signal factor, and higher mean particle size indicated that Fe 3 O 4 /WHB accelerated the sludge granulation process. Microbial community analysis revealed that enriched bacteria Geobacter along with archaea Methanothrix and Methanosarcina may be involved in direct interspecies electron transfer by Fe 3 O 4 /WHB stimulation, enhancing the performance of 2,4,6-trichlorophenol fermentation. It is shown that use of Fe 3 O 4 /WHB is feasible for enhanced CGW treatment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2019
·Vol. 42
·期 23
·3512-3520
·
IF 2.516
Shan Xue,Yiyu Wang,Dan Wu,Jiwei Shen,Yinmao Wei,Chaozhan Wang
In this work, core-shell structured magnetic mesoporous carbon nanospheres were fabricated from the carbonization of metal-polyphenol coordination polymer-coated Fe 3 O 4 nanoparticles. The preparation method is simple, fast, versatile, and easy to scale up. Magnetic mesoporous carbon nanospheres exhibit a high specific surface area, high superparamagnetism, and high adsorption efficiencies for phthalates. Four phthalates were extracted from aqueous solutions by using magnetic mesoporous carbon nanospheres via magnetic solid phase extraction. Subsequent analysis was performed by using high-performance liquid chromatography with ultraviolet detection. The analytical method has good linearity in the concentration range of 1–200 ng/mL for diethyl phthalate, diisobutyl phthalate, and dicyclohexyl phthalate, and 3–200 ng/mL for dipropyl phthalate. The limits of detection were in the range of 0.10–0.62 ng/mL. Compared with previous methods, this method has a lower detection limit, wider linearity range, and faster adsorption and desorption rates. The results indicate that magnetic mesoporous carbon nanospheres are suitable for the enrichment of hydrophobic substances from aqueous solutions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 11
·1-12
·
IF 2.9
Wang Xilin,Sun Xiaojing,Dai Ping,Xu Dongyan
This study focuses on preparation of a novel Fe 3 O 4 @C/RM composite by carbothermal reduction of red mud (RM) with scrap tire-derived carbon black and its application for the degradation of orange II in water by activating PMS. X-ray diffraction (XRD) measurements revealed that hematite (Fe 2 O 3 ) was reduced to Fe 3 O 4 in the pyrolysis process above 600 o C. The reduction pathway of Fe 2 O 3 was inferred by detecting the gas emissions during carbothermal reduction. Morphology analysis indicates that Fe 3 O 4 nanoparticles were encapsulated in a carbon matrix, forming a composite with the residual components of RM. The as-prepared Fe 3 O 4 @C/RM composite exhibited high performance toward orange II degradation with 95.9% removal of orange II within 90 min. Electron paramagnetic resonance (EPR) and quenching tests were applied to illustrate the activation processes of peroxymonosulfate. Both radical and non-radical oxygen species are responsible for the efficient degradation of orange II in the Fe 3 O 4 @C/RM/PMS system.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Man-Man Wang,Zi-Ling Li,Han Wu,Ke-Yan Chen,Fan Guo,Gui-Fu Zuo,Yu He,Xue-Bo Yin
Magnetic solid-phase extraction (MSPE) was developed based on a well-designed Fe 3 O 4 -NH 2 @g-C 3 N 4 nanocomposite as sorbent for a mixture of six benzophenones (BPs) in environmental water samples. The composite fabricated via in-situ self-assembled g-C 3 N 4 shell with homogeneous polymerization of cyanuric chloride and cyanuric acid on Fe 3 O 4 -NH 2 core. While high adsorption capacity was derived from g-C 3 N 4 via hydrophobic, π-π and hydrogen bonding interactions to the targets, the fast magnetic separation was realized with Fe 3 O 4 core for less solvent consumption. In combination with LC-MS/MS, the Fe 3 O 4 -NH 2 @g-C 3 N 4 sorbent minimized the interfering components, reduced the matrix effects, and provided the enrichment factors of 121–150 for six BPs with relative standard deviations ≤ 9.7% even after 20 times extraction-desorption cycles. The present method gave the detection limits of 0.3–2.5 ng/L for six BPs with the linear ranges of 1.0–2000 ng/L, and the recoveries of 84.6%−104% in sea water and 86.2%−107% in lake water samples. Thus, the Fe 3 O 4 -NH 2 @g-C 3 N 4 -based MSPE coupled with LC-MS/MS method provided a convenient, efficient, and reliable alternative to monitor trace BPs in environmental water samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Mingyi Ma,Zhixiang Lv,You Li,Ziye Zhu,Chen Ling,Dawei He,Ruijiang Liu
Problem Unhealthy dietary habits and inadequate existing treatment technologies have led to high morbidity and mortality rates in patients with gastric cancer, and the research shows that curcumin has excellent antitumor properties, however, the non-water-soluble characteristic of curcumin limits its applications. To break the limitation, the targeted drug carriers become the urgent need to treat gastric cancer. Method The heterogeneous magnetic α-Fe 2 O 3 /Fe 3 O 4 nanoparticles were obtained by rapid combustion method with citric acid (CA) and ferric nitrate as raw materials and anhydrous ethanol as solvent and fuel, and then modified with citric acid (CA) and chitosan (CTS), and loaded curcumin (Cur) to form α-Fe 2 O 3 /Fe 3 O 4 -CA-CTS-Cur nanosystem. Results The particle sizes of heterogeneous magnetic α-Fe 2 O 3 /Fe 3 O 4 nanoparticles and α-Fe 2 O 3 /Fe 3 O 4 -CA-CTS-Cur nanosystem were 24.9 nm and 35.6 nm, respectively, and their respective saturation magnetization were 70.9 emu/g and 30.3 emu/g. The magnetic α-Fe 2 O 3 /Fe 3 O 4 -CA-CTS-Cur nanosystem had good stability, excellent drug release rate, and enhanced apoptosis to gastric cancer cells (SGC-7901) through the caspase pathway and ferroptosis of cells. Conclusions The magnetic drug delivery nanosystem was successfully constructed, and revealed significant inhibitory and killing effects on SGC-7901 cells, and low toxic and side effects on normal cells.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CONTROL
·
2023
·
IF 6
Yangjie Chen,Li Zheng,Juan Hao,Lijuan Huang,Qinghui Wang,Youting Zhou,Zhihang Yin,Lingpu Jia,Huiming Li,Wenlong Liao,Kunping Liu
In this study, a magnetic metal-organic frameworks (MOFs) based hybrid substrate was designed and fabricated for SERS detection of enrofloxacin (ENR) in milk. The magnetic MOF (Fe 3 O 4 @UiO-66-NH 2 ) was synthesized by a facile microwave-assisted method, then loaded with popcorn-like Au nanoparticles (NPs) through electrostatic interaction. The as-prepared SERS substrate (Fe 3 O 4 @UiO-66-NH 2 /Au NPs) integrated the abundant hot spots of popcorn-like Au NPs with porous Fe 3 O 4 @UiO-66-NH 2 , which greatly improved its SERS activity and stability. More importantly, benefiting from the fingerprint characteristics of SERS and adsorption performance of Fe 3 O 4 @UiO-66-NH 2 , the SERS substrate exhibited high selectivity and sensitivity in detecting ENR. Under the optimal detection condition, a good linearity (R 2 = 0.996) was obtained with ENR concentration of 1.0 × 10 −9 –1.0 × 10 −6 M in spiked milk, the LOD was as low as 5.26 × 10 −10 M, and the recoveries were in the range of 76.1–86.1 % at three different spiking levels. The whole detection process including sample pretreatment took about 50 min, which indicating that the prepared substrate has great potential in sensitive and real-time detection of ENR in milk.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Xiaoyu Bai,Peng Liu,Xingtong Gao,Kai Liu,Aixiang Li,Zijian Lyu,Qiuhong Li
It is a major obstacle to further development of membrane technology that membrane fouling occurs. In this study, a novel Fe 3 O 4 @UiO-66-NH 2 /PVDF-co-CTFE mixed matrix membrane was successfully developed by mixing Fe 3 O 4 @UiO-66-NH 2 nanoparticles (NPs) into PVDF-co-CTFE membrane through a simple non-solvent-induced phase separation (NIPS) method, and was used for degradation of organic wastewater. The results of the incorporated Fe 3 O 4 @UiO-66-NH 2 NPs content on the morphology, pore structure and physicochemical structure of samples were investigated systematically. The results indicated that the Fe 3 O 4 @UiO-66-NH 2 NPs addition in membrane matrix improved the permeability and significantly enhanced the anti-fouling performance. When 2 wt% Fe 3 O 4 @UiO-66-NH 2 NPs was added, the mixed matrix membrane had excellent comprehensive performance, maintaining a high pure water flux of 226.8 L m −2 h −1 , the BSA rejection rate reached 95.9%, and the flux recovery rate was 71.38%. Importantly, the membrane possessed high catalytic performance based on the Fenton reaction mechanism, and the removal rate of 20 mg L −1 MB solution (400 mL) was up to 99.04%, and showed excellent self-cleaning characteristics and long-term stability. In conclusion, this study provided a new idea for the development of Fenton catalytic membranes with excellent anti-fouling performance for wastewater treatment in complex environments.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2019
·
IF 3.073
Wenkan Fang,Zhe Wang,Qiang Xie,Yan Liu,Deyi Wu
In developing a magnetic material for the recovery of phosphate from water/wastewater, both high magnetization and high uptake ability for phosphate are highly desirable. In our quest to obtain such a magnetic material, hydrous zirconia-coated magnetite nanocomposite (Fe 3 O 4 @ZrO 2 ) has been synthesized at different end-point pH values and stirring rates. The results indicated that the saturation magnetization of Fe 3 O 4 @ZrO 2 increased almost linearly with increasing end-point pH, and high stirring rate caused low magnetization. The magnetization behavior was closely related to the formation of the mineral magnetite, which was hindered at either low end-point pH or fast stirring rate. In contrast to magnetization, phosphate adsorption capacity decreased with increasing end-point pH, whereas the stirring rate had little effect. It is concluded that adopting a relatively low end-point pH and a low stirring rate is a good strategy for obtaining a Fe 3 O 4 @ZrO 2 material with good magnetic separability and a high affinity for P.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Qingguo Chen,Jiaxing Liu,Lei Tang,Zhixiang Zeng,Baikang Zhu
The ex-situ method is suitable for the preparation and practical engineering application of large-sized adsorption materials like sponges. pH-responsiveness can solve the post-treatment problem of oil-absorbing sponges. Here, a facile ex-situ method is proposed to construct large-sized multi-functional oil-water separation materials by adsorbing pH-responsive magnetic core-shell structured nanoparticles (MNP) onto different substrates including sponge, metal mesh, and sandpaper. The MNPs are prepared by chemical coating and surface modification. The sponge can achieve in-situ renewable oil-water separation through the "oil absorption - oil desorption" process under different pH values, and the oil droplets exhibit a segmented wiredrawing desorption process. The generated secondary oily wastewater can be further separated through modified metal mesh, which can treat oily wastewater with more complex situations such as oil-water-oil three-phase mixtures. The detached nanoparticles (NP) can be easily recycled and reused through magnets. This method can achieve a large-scale in-situ treatment renewable oil-water separation process that integrates wastewater purification, oil collection, and material regeneration, which is environmentally friendly, energy-saving, and suitable for engineering applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Qiao An,Zifeng Li,Robert Graff,Jia Guo,Haifeng Gao,Changchun Wang
A hydrid microsphere Fe3O4@carbon@poly(InIII-carboxylate) consisting of a cluster of Fe3O4 nanoparticles as the core, a carbon layer as the inner shell and a porous InIII–carboxylate coordination polymer as the outer shell was prepared and applied as a recyclable catalyst for the cycloaddition reaction of CO2 and epoxides. Construction of this hybrid microsphere was achieved in the two steps, including (1) the one-pot solvothermal synthesis of Fe3O4@C particles with the abundant carboxylic groups on the carbon surface and (2) the subsequent growth of the outer shell polymers based on the precipitation coordination polymerization. Imidazolium-substituted Salen ligands were synthesized and chelated with the In(III) ions using the terminal carboxylic groups. The coordination polymer shell was formed on the Fe3O4@C particles, and the structures including shell thickness, surface area and porosity could be varied by tuning the feeding ratios of the In(III) ions and the ligands. The optimal structure of the coordination polymers showed a shell thickness of ca. 45 nm with ∼5 nm of mesopore, 174.7 m2/g of surface area and 0.2175 cm3/g of pore volume. In light of gas uptake capability, catalytic activity and magnetic susceptibility, cycloaddition of CO2 with a series of epoxides were studied by using Al-complexed Fe3O4@C@InIII-[IL-Salen] microspheres. The results validated that the self-supporting catalytic layer with high surface area was of remarkable advantages, which were attributed from great increment of effective active sites and combination of nucleophilic/electrophilic synergistic property and CO2 uptake capability. Therefore, these hybrid microspheres provided excellent catalytic activity, prominent selectivity to cyclic carbonates and outstanding recyclability with the assistance of an applied magnetic field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 124
·102210-102218
·
IF 3.84
Wanchun Guo,Jiao Jiao,Kesong Tian,Yongfu Tang,Yin Jia,Ruifei Li,Zhaopeng Xu,Haiyan Wang
A soft template-assisted simultaneous redox strategy has been developed to fabricate Fe3O4@polypyrrole/Pd (Fe3O4@PPy/Pd) nanocomposites with a single Fe3O4 core and multiple PPy satellites, into each of which multiple tiny Pd nanocrystals are uniformly confined. The dispersion of Pd nanocrystals into PPy satellites and the Pd loading of the nanocatalyst could be finely tuned by tailoring the polarity of the reaction medium and by changing the molar ratio of pyrrole monomer to Pd precursor, respectively. The Pd-based catalyst shows high activity, robust stability and magnetic recyclability for the reduction of nitroaromatic compounds. Superior activity could be attributed to the short transport route toward the active Pd nanocrystals within the small PPy satellite for the outer substitutes. Meanwhile, high stability could be ascribed to the confinement of Pd nanocrystals uniformly into PPy satellites against aggregation and even loss of active sites during catalytic transformations.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Lun Han,Xu Wang,Bin Yu,Xiaoyuan Qin,Baocheng Liu,Xu Han,Huifen Yuan,Bin Yu,Zhiqi Zhao
Glucose is a key biomarker of diabetes, and effective glucose monitoring methods are crucial to the prevention and management of diabetes. Therefore, in this paper, Fe 3 O 4 /DEX/PDA@Au (Raman reporters) @Au nanocomposites were synthetized that with DTNB (5,5′-dithiobis(2-nitrobenzoic)), MMTA (2-mercapto-4-methyl-5-thiazole acetic acid), MBA (4-mercaptobenzoic acid) and 4-Mpy(4-Mercaptopyridine) were used separately as Raman reporters. Fe 3 O 4 and PDA (Polymerized dopamine) could supply more high surface area of active sites and high SERS (Surface-Enhanced Raman Scattering) substrate, which has high stability and reproducibility. Dextran coating is an effective way to prepare biocompatible materials TEM, XRD, TG and VSM were used to analyze the size, morphology and magnetic properties of the nanocomposites. Fe 3 O 4 /DEX/PDA@Au(Raman reporters)@Au that integrates a multi-hotspot structure and magnetic separation techniques were studied the enhancement effect of Raman spectra, and glucose solutions with different concentrations were tested. Furthermore, the optimal Fe 3 O 4 /DEX/PDA@Au(Raman reporters)@Au nanocomposites were supplied as SERS substrates for detection of glucose accurately and quickly in sweat. SERS signal intensity is linearly correlated with glucose concentration within the measurement range of 5 × 10 -3 to 10 mM, and the minimum detectable concentration is 5 µM. The Fe 3 O 4 /DEX/PDA@Au(Raman reporters)@Au nanocomposites exhibit high reliability, specificity and repeatability of the strategy were then verified by practical detection of sweat.
✓ 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）