MATERIALS RESEARCH INNOVATIONS
·
2015
·
IF 0.83
X. L. Zou,S. L. Gu,G. Q. Lai,C. Y. Lu,X. L. Xie,X. G. Lu,Z. F. Zhou
The electrodeposition of nano-iron films from Fe2O3 precursor in an ionic liquid composed of 33·3 mol-% choline chloride (ChCl) and 66·7 mol-% ethylene glycol (EG) has been investigated. The electrodeposition process was carried out at 1·5–1·9 V and 60–120°C for 3 hours. The influences of experimental parameters on the electrodeposition process and the morphology of the deposited nano-iron films were studied. The results show that compact and uniform nano-iron (particle size is approximately 100–200 nm) films can be electrodeposited in the Fe2O3-saturated ChCl-EG ionic liquid at 1·8–1·9 V and 60–120°C. The electrodeposition temperature and applied potential have significant influences on the characteristics of the deposited nano-iron films and the electrodeposition process. It is suggested that the controllable electrodeposition process can be used to prepare nano-iron films with various particle sizes from Fe2O3 in CHCl-EG eutectic melt.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lei Yang,Yun Chen,Da Ouyang,Jingchun Yan,Linbo Qian,Lu Han,Mengfang Chen,Jing Li,Mingyue Gu
Nanoscale zero-valent iron (nZVI) supported on rice stalk (RS) derived biochar composite (nZVI/RS) was synthesized as persulfate (PS) activator, achieving efficient adsorptive and catalytically oxidative removal for monochlorobenzene (MCB). Development of porous structures and enhanced aromaticity of RS with increased pyrolysis temperatures promoted MCB adsorption, with removal efficiencies of MCB rising from 11.2% for nZVI/RS300 to 72.3% for nZVI/RS700 after the adsorption for 14 h. The best PS activation performance was achieved for nZVI/RS500, with MCB removal efficiency being further increased to 98.8% after the oxidation for 3 h and reaction stoichiometric efficiency (RSE) reaching a maximum of 4.1% under conditions of 0.2 g·L −1 nZVI/RS500, 50.0 μM MCB, 2.0 mM PS and pH 0 6.5. The pre-adsorption of MCB was a rate-promoting step in the oxidative degradation processes within the nZVI/RS-PS systems under low RS pyrolysis temperatures (<500 °C). However, excessive adsorptive capacity of nZVI/RS600 and nZVI/RS700 induced blocking of the active sites and low PS activation efficiencies. In addition to transformation of nZVI and surface functional groups on RS500, electron transfer from sp 2 hybridized carbon enhanced by internal electron migration of sp 3 - sp 2 hybridized carbon was also responsible for PS activation, producing SO 4 •− , · OH and 1 O 2 for MCB degradation through both radical and nonradical pathways. Six degradation intermediates were identified with possible degradation pathways of MCB in the nZVI/RS500-PS system being proposed. Additionally, 80.2% and 67.4% of MCB removal rates were achieved in tap water and groundwater contaminated by MCB respectively. These findings have significant implications for the synthesis and application of metal-carbon composite based multifunctional materials with strong adsorption and catalytic potential for activating PS to completely remove organic contaminants in groundwater.
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
Alexandria Engineering Journal
·
2023
·
IF 6.8
Changbiao Chi,Buqing Huo,Zedong Liang,Chenxi Hu,Qingyue Sun,Shufeng Zhou
The presence of antibiotics in wastewater has become a significant concern due to their potential environmental impact and contribution to antibiotic resistance. In this study, we investigated the degradation of tetracycline, a commonly used antibiotic, in wastewater using a system based on zero-valent nano iron assisted micro-nano bubbles (MB/nZVI). The synthesized nZVI-BC composite, consisting of nano zero-valent iron particles loaded onto phosphoric acid-activated biochar, served as an efficient adsorbent for tetracycline removal. Our findings revealed that the combination of MBs and nZVI significantly enhanced the degradation efficiency of tetracycline. The MB/nZVI system exhibited the highest removal rate of 82.81% after a 2 h reaction, surpassing the performance of MB alone, nZVI-BC alone, and conventional bubble (CB)/nZVI-BC systems. Furthermore, the MB/nZVI system showed superior degradation performance at a dosage of 25 g/L and an MB flow rate of 30 mL/min. The pH condition had no significant effect on tetracycline degradation in the MB/nZVI system. Our results demonstrate that the use of MB/nZVI has the potential to be a sustainable and efficient approach for the remediation of tetracycline-contaminated wastewater.
研究领域:
环境科学
·
污水处理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Yinzhi Lv,Lin Chen,Anning Zhang,Guodong Sheng,Qing Liao
In this study, a novel nanocomposite of iron sulfide supported on two-dimensional titanium carbide (FeS@Ti 3 C 2 T x ) was constructed and applied in U(VI) removal from wastewater under anoxic conditions. The results demonstrated that FeS@Ti 3 C 2 T x had excellent removal ability, and the highest scavenging capacity reached 1098.2 mg/g at T = 303 K, which was better than that on Ti 3 C 2 T x or FeS material under the same experimental conditions. Various factors, such as contact time, initial pH, adsorbent dose and initial U(VI) concentration, were comprehensively investigated by batch experiments. U(VI) removal on FeS@Ti 3 C 2 T x was strongly dependent on the initial pH, and its optimum value was at pH = 5.0. The reaction process of U(VI) removal on FeS@Ti 3 C 2 T x reached equilibrium within 3 h. The kinetics and isotherm analyses under different conditions demonstrated that U(VI) removal on FeS@Ti 3 C 2 T x was in accordance with pseudo-second-order and Freundlich models. These results suggested that the FeS@Ti 3 C 2 T x nanocomposites could be an efficient scavenger for environmental remediation.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·
IF 0
Zhao Jingnan,Chen Junwen,Wang Qun,Xiong Renxuan,Ma Jun
As reported, the persistent toxic and harmful pollutant bisphenol A (BPA) from industrial emissions has been consistently found in aquatic environments inhabited by humans. Periodate (PI)-based advanced oxidation processes (AOPs) have been employed to degrade BPA, although activating PI proves more challenging compared to other oxidants. A novel nano iron metal catalyst, sulfided nanoscale iron-nickel bimetallic nanoparticle supported on biocarbon (S-(nFe 0 -Ni)/BC) was synthesized and utilized to activate PI for the removal of BPA. The morphology, structure, and composition of S-(nFe 0 -Ni)/BC were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy-energy dispersive spectrometer (SEM–EDS), and fourier-transform infrared spectrum (FTIR). The catalyst demonstrates an excellent ability to activate PI, achieving a BPA removal efficacy of 86.4%, accompanied by a 33% reduction in total organic carbon (TOC) in the {S-(nFe 0 -Ni)/BC}/PI system. BPA degradation exhibited a significant change at the 5-min mark. In the first stage (0–5 min), nonlinear dynamic fitting research, combined with scavenging experiments, unveiled the competitive degradation of pollutants primarily driven by iodate radical ( \({{\mathrm{IO}}}_{3}^{\cdot }\) ), singlet oxygen \(\left({}^{1}{{\mathrm{O}}}_{2}\right)\) , and hydroxyl radical ( \(\cdot {\mathrm{OH}}\) ). The competitive dynamics aligned with the ExpAssoc model. The contribution rates of different active species during the second stage (5–120 min) were calculated. The contributions of main species to BPA removal follow the order of \({{\mathrm{IO}}}_{3}^{\cdot }\) > \({}^{1}{{\mathrm{O}}}_{2}\) > \(\cdot {\mathrm{OH}}\) throughout the entire process. The influence of various parameters, such as the dosage of S-(nFe 0 -Ni)/BC, initial PI concentration, BPA concentration, pH, temperature, and the presence of coexisting anions, was also examined. Finally, a plausible reaction mechanism in the system is proposed, suggesting that the {S-(nFe 0 -Ni)/BC}/PI system involves a heterogeneous synergistic reaction occurring primarily on the surface of S-(nFe 0 -Ni)/BC. Therefore, this study proposes a promising approach for PI-based AOPs to degrade organic pollutants, aiming to mitigate the irreversible harm caused by such pollutants to organisms and the environment.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
Materials Research Express
·
2018
·Vol. 5
·期 6
·066106
·
IF 1.151
Renxin Xu,Huan Yang,Huajun Sun,Yueli Liu,Huan Zhou,Jianchun Liu
Mg0.2Mn0.8HoxFe2−xO4 (x = 0.025, 0.050, 0.075 and 0.100) nanocrystalline is synthesized via a hydrothermal technique. Single phase cubic spinel is confirmed by XRD and the formation of Mg0.2Mn0.8HoxFe2−xO4 is verified by EDS. The average size for the nanoferrites is around 80 nm which is examined by TEM with the presence of agglomerated particles. Ho3+ substituted Mg-Mn nanoferrites exhibit the low saturation magnetization (Ms) and coercivity (Hc). Especially, with x = 0.100, the nanoferrites show the lowest Ms and Hc of 46.850 emu g−1 and 46 Oe, respectively. The ferrite composites present the dielectric dissipation less than 0.37 and the magnetic loss less than 0.46 at 2–18 GHz. The low saturation magnetization, low coercivity and low dielectric dissipation indicate that the addition of Ho3+ contributes to synthesize better soft magnetic 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
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 3
·1-9
·
IF 1.81
Ding Feng,Lin Jing,Wu Tengyan,Zhong Hongbin
Magnetic nanoparticles were one of the most promising materials for targeted magnetic hyperthermia application due to the excellent magnetic properties. In this work, the magnetic nanoferrite of Mn 0.6 Zn 0.4 La x Fe 2− x O 4 ( x = 0.09, 0.1, 0.15, 0.2, 0.25 and 0.3) was synthesized by the hydrothermal method. Various physical properties of samples have been characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), transmission electron microscopy and vibrating sample magnetometer. XRD results revealed that the lattice constants a t and crystallite size of the Mn–Zn nanoferrites decreased with increasing La 3+ content. The characteristic absorption bands of spinel nanoferrites and polyethylene glycol were observed in the FTIR spectra. FTIR results indicated that polyethylene glycol was coated on the Mn–Zn nanoferrites successfully. The saturation magnetization ( M S ), magnetic moment ( M r ) and anisotropy constant ( K ) were affected by La 3+ ion content. The M S of Mn 0.6 Zn 0.4 La 0.09 Fe 1.91 O 4 was 58 emu/g, which could be potential hyperthermia in biomedical application.
研究领域:
材料科学
·
医学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Energy
·
2023
·Vol. 18
·期 1
·42-53
·
IF 2.9
Fang Can,Tang Xiangmei,Wang Jiaoyan,Yi Qingfeng
Highly efficient and stable iron electrodes are of great significant to the development of iron-air battery (IAB). In this paper, iron nanoparticle-encapsulated C-N composite (NanoFe@CN) was synthesized by pyrolysis using polyaniline as the C-N source. Electrochemical performance of the NanoFe@CN in different electrolytes (alkaline, neutral, and quasi-neutral) was investigated via cyclic voltammetry (CV). The IAB was assembled with NanoFe@CN as the anode and IrO 2 + Pt/C as the cathode. The effects of different discharging/charging current densities and electrolytes on the battery performance were also studied. Neutral K 2 SO 4 electrolyte can effectively suppress the passivation of iron electrode, and the battery showed a good cycling stability during 180 charging/discharging cycles. Compared to the pure nano-iron (NanoFe) battery, the NanoFe@CN battery has a more stable cycling stability either in KOH or NH 4 Cl + KCl electrolyte.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Toxics
·
2025
·Vol. 13
·期 3
·221
·
IF 4.1
Kezhou Liu,Ying Xu,Mengjie Ying,Meiling Chen
Particulate matter coexists with persistent organic pollutants (POPs) in the atmosphere, which can enter the human body by accompanying inhalable particles in the respiratory tract. Photochemical conversion further alters the chemical composition of the precursor particles and secondary products. This study investigated the effects of nanoscale iron–chlorobenzene mixtures and their photochemical conversion products on early lung development in rat pups. Using network toxicology and animal experiments, we constructed a compound toxicity–target network and developed air exposure models. This study revealed that both pollutants, before and after photochemical conversion, bound to the aryl hydrocarbon receptor (AhR), increased oxidative stress, altered lung tissue morphology, and reduce inflammatory factor expression. Rat pups were highly sensitive to pollutants during critical stages of lung development. However, no significant differences in oxidative stress or inflammation were observed between the pollutants, likely because of immature lung tissues. Once tissue damage reached a threshold, the response to increasing pollutant concentrations diminished. This study provides insights into atmospheric pollutant toxicity and scientific evidence for the risk assessment of dioxin-like nanoscale mixtures.
研究领域:
环境毒理学
·
呼吸系统生物学
·
网络毒理学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yanli Kong,Mengxing Li,Yangyang Zhou,Rui Pan,Zhao Han,Jiangya Ma,Zhonglin Chen,Jimin Shen
The current carbothermal method involves impregnation and reduction of ferric salt with the problems of low product activity and high cost, limiting the large-scale production and application of nano-zero-valent iron (nZVI). In this work, the nano-iron-carbon composites (CB-nZVI) were successfully synthesized at a high efficiency, low consumption and batch production process and showed a rapid and efficient As(V) removal from high-arsenic acid wastewater (pH<2 and As(V)> 5 g/L). More than 99.77% As(V) was removed by CB-nZVI under optimum reaction conditions of pH 1.7, initial As(V) concentration 5 g/L and nZVI dosage 11 g/L at 40 ℃ with approximately 11 mg/L As(V) still remained in the filtrate. A novel continuous two-stage treatment process was proposed with only 0.12 mg/L As(V) remained in the filtrate, which met the demands specified in Emission Standard of Pollutants for the Sulfuric Acid Industry issued by Ministry of Environmental Protection of China (GB26132–2010), and solid wastes were greatly reduced at the same time. The iron species distributed on the CB-nZVI core-shell structure possessed a high chemical reduction potential gradient driving force which resulted in the adsorbed As(V) would further be reduced to As(III) and As(0) and then diffusing across the thin oxide layer, leading to accumulating or immobilizing the arsenic at the CB-nZVI. Moreover, strongly acidic condition and Fe/C micro-electrolysis could accelerate the corrosion of CB-nZVI and generate iron oxides for As(V) adsorption. These results suggested that CB-nZVI has great potential for the disposal of strongly acidic wastewater with high concentration in the smelting industry.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
AGRICULTURAL WATER MANAGEMENT
·
2023
·
IF 6.7
Lingyun Chen,Ziyi Hu,Wenhui Chen,Ziwei Xu,Can Hao,Prakash Lakshmanan,Dunyi Liu,Xinping Chen
The high loss of foliar-applied fertilizers in the wet season and other extreme weather conditions reduces fertilizer use efficiency remarkably low. Emerging nano-iron materials, owing to their highly desirable properties such as exceptionally small size, particle surface and interface attributes, strong adhesion and high iron ratio, could overcome the limitations of traditional fertilizers. However, their anti-leaching property, leaching resistance mechanism, iron nutrition enrichment capacity and cost effectiveness remain unclear. In this study, four nano-iron materials (Fe nanoparticles (Fe-NPs), Fe 3 O 4 -NPs, α-Fe 2 O 3 -NPs and γ-Fe 2 O 3 -NPs) were compared with traditional iron fertilizers (FeSO 4 and Fe-EDTA). The results showed that the efficiency of traditional iron fertilizers decreased greatly under simulated rainfall conditions due to their poor leaching resistance. In contrast, nano-iron fertilizers performed exceptionally well under simulated rainfall conditions with significant increase in leaf iron concentration, photosynthesis and growth of peanut. This was mainly attributed to their decreased contact angle, increased wetting capacity and increased adhesion on plant surface, which collectively decreased fertilizer leaching remarkably. The adhesion capacity of Fe 3 O 4 -NPs (53.5 mN/m), was nearly three times that of traditional iron fertilizer (18.3 mN/m). Therefore, only a small amount of Fe 3 O 4 -NPs (4 mg/plant) was needed relative to traditional iron fertilizers (FeSO 4 , 59 mg/plant) to achieve comparable high leaf Fe concentration (1076.96 μg/g) under rainfall conditions. Cost evaluation suggests that the cost-competitiveness of Fe 3 O 4 -NPs will become comparable to that of FeSO 4 when its price comes down from the current cost of $139/kg to $36/kg, the cost of FeSO 4 , which is likely considering the pace of nano-material technology development. Together, these results demonstrate the remarkable potential of nano-iron fertilizers in mitigating the escalating fertilizer cost and improving the environmental outcomes of peanut, as well as potentially other crops grown in wet season.
研究领域:
农业科学
·
植物营养学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Olusegun K. Abass,Kaisong Zhang
The rising water-use intensity, and lack of cost-effective treatment strategy and reuse of hydraulic fracturing flowback (HFF) has become an increasing cause of concern. The present work evaluates the integration of parallel sets of tandem anaerobic-oxic membrane bioreactor (AMBR) with and without nano-Fe for treatment and reuse of real HFF obtained from Ordos Basin, China. Treatment efficiencies in terms of organic conversions, micro-pollutants degradation, resource recovery, and effects of nano-Fe release on membrane fouling were evaluated. Nano-Fe mediated AMBR (FAMBR) system effectively reduce target micro-pollutants (such as Acenaphthylene) at 94.4 % compared to the parallel AMBR system (17.1 % without nano-Fe). Moreover, recovery of potential economic chemicals like Al and P (1.0 and 0.6 mg/g spent nano-Fe) availed using FAMBR system. However, colonization of FAMBR membrane surface by Fe–protein/peptide hydroxocomplexes initiated by Fe-catalyzed microbial extrusions present a huge fouling challenge relative to the AMBR system. Additional evidences from microscopic/spectroscopic analysis of the FAMBR membrane system revealed that despite having a promising outlook, mediation of nano-Fe with AMBR system might result in a major fouling event during HFF treatment. Engineered design of nano-Fe to reduced leached nano-Fe ions in pre-treatment step prior to AMBR treatment system may be of potential research consideration.
研究领域:
环境科学
·
水资源管理
·
污水处理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）