RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2019
·Vol. 91
·期 12
·2058-2064
·
IF 0.508
Zhan Yingqing,Zhao Rui,He Shuangjiang,Zhao Shumei,Xue Weidong
Development of novel corrosion inhibitors is important for improving the anticorrosion of carbon steel because the serious carbon steel corrosion causes enormous economic losses to humankind. In this work, we demonstrated the novel organic functionalized Fe 3 O 4 hybrid inhibitor for enhancing the anticorrosion performance of carbon steel. For this purpose, amino-Fe 3 O 4 nano-spheres (NH2–Fe 3 O 4 ) were prepared via solvothermal route, using FeCl 3 .6H 2 O as an iron source and 3-aminophenoxy-phthalonitrile as precursor. Then, the N,N-diethyl-3-amine methyl propionate (DM) was reacted with amino-Fe 3 O 4 nano-spheres to produce the organic functionalized nano-Fe 3 O 4 hybrid. The chemical composition and micro-structure of as-obtained organic functionalized Fe 3 O 4 hybrid were characterized and confirmed by Fourier transform infrared, X-ray diffraction, and scanning electron microscopy. Furthermore, the anticorrosion performance of carbon steel by addition of organic functionalized nano-Fe 3 O 4 inhibitor was investigated by AC impedance measurements and polarization curves. The research results showed that the organic functionalized nano-Fe 3 O 4 exhibited enhanced inhibition effect for carbon steel, which can be used as a new type of carbon steel corrosion inhibitor.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Xiahong Shi,Xiaoting Zhang,Wei Gao,Yalin Zhang,Defu He
Microplastics (MPs) have been widely detected in aquatic environments, and become emerging contaminants of growing concern. It is urgently needed to explore how to effectively remove MPs from water. This study first established an alternative method of removing MPs by magnetic nano-Fe 3 O 4 . Results showed that 1.3 g·L −1 nano-Fe 3 O 4 and 150 min treatments caused optimal magnetization of MPs via surface absorption. Then, magnetized MPs in water can be conveniently removed by suction of the magnet. The average removal rate of four common types of MPs including polyethylene, polypropylene , polystyrene and polyethylene terephthalate in size of approximately 200–900 μm was 86.87 ± 6.92%, 85.05 ± 4.70%, 86.11 ± 6.21%, and 62.83 ± 8.34%, respectively. The removal rate varied among polymer- and size-different MPs, and was positively related to the density of nano-Fe 3 O 4 absorbed on MP surfaces. In addition, the removal rate of MPs in artificial seawater was relatively high in comparison to pure water. Furthermore, the established approach was effectively applied to remove MPs in environmental water bodies including river water, domestic sewage, and natural seawater, with the removal rate of higher than 80%. Altogether, this study provided a novel and simple removal approach to remove MPs in water, which has a certain application prospect.
研究领域:
环境科学
·
材料科学
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhu Xiong,Yongshi Huang,Zehui Huang,Yiwen Shi,Fangshu Qu,Gaosheng Zhang,Jingxin Yang,Shuaifei Zhao
Membrane surface fouling is often reversible as it can be mitigated by enhancing the crossflow shear force. However, membrane internal fouling is often irreversible and thus more challenging. In this study, we developed a new superhydrophilic poly(vinylidene fluoride) (P-PVDF) membrane confined with nano-Fe3O4 in the top skin layer via reverse filtration to reduce internal fouling. The surface of the P-PVDF membrane confined with nano-Fe3O4 had superwetting properties (water contact angle reaching 0° within 1 s), increased roughness (from 182 to 239 nm), and enhanced water affinity. The Fe3O4@P-PVDF membrane surface showed a thicker and enhanced hydration layer, which prevented foulants from approaching membrane surfaces and pores, thereby improving the rejection. For example, when 50 ppm humic acid (HA) solution was used as the feed, the removal efficiency of the Fe3O4@P-PVDF membrane was ∼67%, while the HA removal of the P-PVDF membrane was only ∼20%. The results from the resistance-in-series model showed that nanoconfinement of Fe3O4 in the top skin layer of the membrane allowed foulants to accumulate on the membrane surface (i.e., surface fouling) rather than within the internal pores (i.e., internal fouling). The filtration results under crossflow fouling and cleaning confirmed that the Fe3O4@P-PVDF membrane had higher surface fouling but it was much more reversible and much lower internal fouling compared with the control membrane. Our fouling analysis offers new insights into mass transfer mechanisms of the membrane with a nanoconfinement-enhanced hydration layer. This study provides an effective strategy to develop membranes with low internal fouling propensities.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2021
·Vol. 35
·期 6
·1021-1030
·
IF 0.957
Wei Junchong,Long Xuejun,Wang Jia,Tang Zheng,Wang Tingting,Kang Hanyu,Liang Shuang
Artificial zeolite was modified by nano-Fe 3 O 4 for development of functional adsorbents. Subsequently, adsorbents such as calcium cross-linked nano-Fe 3 O 4 microspheres (Ca-MS), calcium cross-linked nano-Fe 3 O 4 modified zeolite microspheres (Ca-MZS) and iron cross-linked nano-Fe 3 O 4 modified zeolite microspheres (Fe-MZS) were prepared and compared for their adsorption performance. The effects of adsorbent dosage, solution pH, initial concentration and ion content on the removal of Cu 2+ from wastewater are investigated, and the adsorption kinetics and isotherms for the adsorbent materials were analyzed. The experimental results indicate that for the initial concentration of Cu 2+ of 30 mg/L, the adsorption is noted to be most stable. The optimal initial pH for adsorbing Cu 2+ is observed to be 5.5. At an optimal dosage of Ca-MZS of 900 mg/L, the adsorption capacity is measured to be 28.25 mg/g, along with the removal rate of 72.49%. The addition of Na + and K + affects the adsorption of Cu 2+ . For the Na + and K + concentration of 0.2 mmol/L, the Cu 2+ removal rate by Ca-MZS drops to 11.94% and 22.12%, respectively. As compared with the adsorbents such as Natural Zeolite (NZ), Ca-MS and Fe-MZS, Ca-MZS demonstrates the best removal effect in solution, where the removal rate reaches 84.27%, with the maximum adsorption capacity of 28.09 mg/g. The Cu 2+ adsorption kinetics of Ca-MZS is observed to follow the Elovich kinetic model, with the adsorption isotherm data fitting the Freundlich isotherm model by using the non-linear method.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2024
·Vol. 11
·期 1
·016301
·
IF 1.8
Lei Li,Long Ma,Xin Guo,Xiaoming Li,Tiejun Liu
In order to solve the problems of low cathode conductivity, shuttle effect, and poor electrochemical performance of Li-S batteries, we designed a porous carbon/nano-sized ferric oxide (Fe3O4) composite modified membrane. This improved both conductivity and adsorption capacity of lithium polysulfides (LiPSs) prepared with mesopores and high specific surface area C-Fe3O4@PE. The membrane can bind polysulfide via chemical and physical adsorption. Owing to these advantages, a Li-S battery based on C-Fe3O4@PE and with a separator exhibited excellent rate performance (965.9 mA h g–1 at 0.2 C and 437.5 mA h g–1 at 5 C), as well as a long cycle life (416.6 mA h g–1 after 300 cycles at 0.5 C, with a capacity retention rate of 50.5%).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2021
·
IF 4.872
Yongfeng Yang,Yi Yang,Chengzhi Liao,Gang Yang,Yuan Qin,QiuQin Li,Mingxia Wu
Pulsed magnetic field treatment was applied to the cemented carbide (WC-12Co) for enhancing its friction-reducing and anti-wear effect under different friction conditions , including dry, distilled water and nano-Fe 3 O 4 particles additive friction. The results show that the friction reduction and anti-wear effect could be enhanced with pulsed magnetic field applied . Especially, with nano-Fe 3 O 4 magnetofluid lubrication , the wear volume of workpiece is reduced by 26.8% and the average friction coefficient is reduced by 12.4%. The effect of the pulsed magnetic field on tribological properties is closely related to the oxidation and remanence. It can promote oxidation and forms a protective layer on the friction pair . Furthermore, it can make magnetofluid gather and amplify the lubrication.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
Lubrication Science
·
2024
·Vol. 36
·期 6
·468-477
·
IF 1.8
Han Yu,Min Li,Jianfang Sun,Jingying Su,Fenghua Su
As an emerging two-dimensional material, black phosphorus (BP) has excellent tribological properties, but the poor dispersion of BP in oil inhibits its application in friction to some extent. Surface modification is one of the effective methods to solve the dispersibility of BP, and the use of nano-Fe 3 O 4 dotted on the surface of BP improves the dispersion stability of BP in soybean from 3 days to about 15 days. Compared with pure soybean oil, friction coefficient and wear rate of the addition of 0.12 wt% BP/Fe 3 O 4 are reduced 65% and 78%, respectively. To elucidate the excellent tribological mechanisms of BP/Fe 3 O 4 as additives in soybean oil, the compositional and structural characterisation of the abrasion mark surface was studied accordingly. On the one hand, soybean oil reacts with BP/Fe 3 O 4 to form a composite tribo-film during the scraping process. This tribo-film composed of amorphous carbon, iron oxide and phosphorus oxide nitrides prevents direct contact between the sliding interfaces. On the other hand, BP and Fe 3 O 4 nanoparticles form a mechanical rollerball structure, which can further reduce interfacial friction and wear through synergistic lubrication. The results provide new insights into the design of additives in biomass lubricating oils and propose new application prospects for BP in the field of lubricating additives.
研究领域:
材料科学
·
摩擦学
·
生物质润滑剂
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Xi-Qi Li,Wen-Zong Liu,Ai-Jie Wang,Xiang-Yu Gao,Yu Tao,Xiao-Li Ge,Zhen Lin
Ink wastewater is hazardous because it contains oil and refractory pollutants, with high Chroma and turbidity . There are many aromatic compounds in the wastewater, such as benzene, toluene, xylene, and phthalocyanines, azos, and nitroso, which make high chemical oxygen demand (COD) and ammonia nitrogen content. The refractory pollutants are always encapsulated in diverse oil-water systems. Usually a massive degreaser has to be used to destroy the dispersant oil forms under preferred alkaline condition, and advanced oxidation is used for good removal of refractory pollutants under preferred acid condition, which commonly lead to a bad coagulation and sedimentation as a result. In this study, the nano-Fe 3 O 4 (MNPs) activated sodium persulfate (SPS) has been testified to enhance degrease with efficient coagulation and sedimentation. The results showed that the removal of oil, COD, ammonia nitrogen, Chroma and turbidity reached respectively 96.40%, 98.35%, 88.00%, 99.70% and 98.22%, within 40–50 min. The mechanism shows that the catalytic oxidation significantly decreased the Zeta potential of the colloidal particles in the wastewater, which destroyed the steady-state of the colloid and enhanced the effect of coagulation sedimentation. Importantly, the combination of MNPs and colloidal particles successfully promoted the simultaneous production of SO 4 − and a large amount of HO under weakly alkaline (pH = 7.5–8.0) conditions, which made synergistic oxidation to remove micro-oil and organic pollution efficiently.
研究领域:
环境科学
·
污水处理
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
·
2017
·
IF 2.962
Yu Jiang,Tao Deng,Yu Shang,Kai Yang,Hongyu Wang
Phenol-containing industrial wastewater disposal has received much attention in recent years due to its toxicity and slow biodegradation. In this work, the isolated fungal strain Debaryomyces sp. was entrapped into Ca-alginate beads with nanoscale Fe 3 O 4 to improve phenol biodegradation ability. Freely suspended cells as well as Ca-alginate immobilized cells without nanoscale particles were also prepared. Phenol removal by free cells and two kinds of Ca-alginate beads was evaluated with different initial phenol concentrations, temperatures, and salinities . The phenol biodegradation kinetics and optimal dosage of nano-Fe 3 O 4 during the preparation of Ca-alginate beads were also determined. The results showed that immobilized Debaryomyces strain had better biodegradation performance than free cells under harsh conditions. Phenol removal rates were highest when using magnetically immobilized cells, followed by nonmagnetically cells. More than 99.9% of phenol was degraded within 80 h by immobilized cells with nano-Fe 3 O 4 when initial phenol concentration was over 900 mg L −1 while the phenol removal efficiencies of free cell and immobilized cells without nano-Fe 3 O 4 were 34.5% and 81.3%, respectively during the same periods of time. The reusability tests were carried out and the results indicated good stability of immobilized cells in saline environments, which was practical in actual industrial wastewater treatment .
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2022
·Vol. 26
·期 10
·2133-2142
·
IF 2.747
Xu Lu,Sun Wanzhou,Zhu Aiping
To solve the volume expansion problem of Fe 3 O 4 nanoparticles (nmFe 3 O 4 ), a facile, green, and industrializable preparation of N-doped carbon–encapsulated nmFe 3 O 4 (nmFe 3 O 4 @N-doped C) is designed. This nmFe 3 O 4 @N-doped C is prepared through pyrolysis in nitrogen atmosphere of nmFe 3 O 4 encapsulated by polyaniline (PANI@nmFe 3 O 4 ) which is obtained through oxidative polymerization of aniline on the surface of nmFe 3 O 4 . In comparison with the capacity (113 mAh g −1 at 0.1C) of nmFe 3 O 4 , the nmFe 3 O 4 @N-doped C electrode exhibits a high reversible capacity of 400 mAh g −1 after 500 cycles. Even at 4C, the nmFe 3 O 4 @N-doped C electrode presents 160 mAh g −1 capacity, which is much higher than 30 mAh g −1 of the nmFe 3 O 4 electrode. The results suggest that the N-doped carbon shell layer obtained from PANI is effective to inhibit volume expansion of nmFe 3 O 4 core and maintain the electron and ion transport channels after long cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2021
·
IF 8.001
Hongyou Wan,Fuzhen Wang,Yuhan Chen,Zisheng Zhao,Guangyi Zhang,Ming Dou,Binghan Xue
In this study, nano-Fe 3 O 4 supporting on granular activated carbon (NFGAC) were prepared, characterized and used as an individual additive to promote the anaerobic digestion of azo dye Reactive Red 2 (RR2) wastewater. Results showed that organics removal and methane production were effectively promoted with the addition of NFGAC. Compared with the control reactor, the RR2 removal efficiency increased by 117.9% and the methane production increased by 167.2% in the 0.18-NFGAC added reactor when sole RR2 used as the substrates. Further analysis indicated that during the RR2 anaerobic digestion process the electron transfer system (ETS) activity was effectively improved with the addition of NFGAC. One of the possible mechanism was that the loading nano-Fe 3 O 4 on the surface of GAC could increase the number of functional groups in NFGAC, which were beneficial to enhancing the electron accepting capacities (EAC) and electron donating capacities (EDC). Microbial community analysis showed that the bacteria ( Halomonas , Pseudomonas and Bacillus ) relevant to RR2 removal were enriched in NFGAC added reactors, which played an important role during RR2 removal process. In addition, the addition of NFGAC could promote potential direct interspecies electron transfer (DIET) between Pseudomonas and Methanosarcina.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 10
·852
·
IF 4.4
Jun Chen,Mengdong Tu,Mengying Xu,Depeng Gong,Xi Li,Chaocan Zhang
In this paper, we designed and investigated a reduction-based method to synthesize controllably monodisperse superparamagnetic nano Fe3O4colloidal clusters for magnetically responsive photonic crystals. It was shown that the addition of ascorbic acid (VC) to the system could synthesize monodisperse superparamagnetic nano Fe3O4and avoided the generation of γ-Fe2O3impurities, while the particle size and saturation magnetization intensity of nano Fe3O4gradually decreased with the increase of VC dosage. Nano Fe3O4could be rapidly assembled into photonic crystal dot matrix structures under a magnetic field, demonstrating tunability to various diffraction wavelengths. The nano Fe3O4modified by polyvinylpyrrolidone (PVP) and silicon coated could be stably dispersed in a variety of organic solvents and thus diffracted different wavelengths under a magnetic field. This is expected to be applied in various scenarios in the field of optical color development.
研究领域:
材料科学
·
光学
✓ 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）