Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yuxiang Shi,Lei Li,Shuyan Zhang,Wenjun Zhou,Shaolin Li,Wei-xian Zhang
A critical problem in the production of ultrafine zero-valent iron (ZVI) using mechanical milling is that the metallic iron (main component of ZVI) is ductile and can withstand severe plastic deformation , which leads to the slow pulverization of ZVI during its milling. In this work, we introduce non-ductile particle solids (FeS x ) as milling aids to enhance the pulverization of the ductile ZVI, and find that the addition can improve the pulverization. The result is verified in three different ways through which the milling aids (FeS x ) are introduced, namely, the addition of the FeS x solid directly, the use of the FeS x that is formed during the milling using aqueous sulfide solution as milling solvent with and without the addition of ferrous ion. The ZVI particles are pulverized to hundreds of nanometers using the milling aids, while the particles are deformed to flakes of a few microns without the milling aids. Such size difference is quantified using two sizing technologies independently and is verified by the study of the hydrodynamic performance at three flow conditions that are of practical interest for the environmental applications of ZVI. Mechanism of the FeS x as milling aids for the pulverization enhancement may relate to its wedge effects, its non-ductile texture that inhibits the cold welding and its fine bead function. The study provides a method to improve the efficiency of the production of ultrafine iron particles for environmental applications and it is also the 1st work reporting the enhancement of the pulverization of ductile ZVI.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
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2019
·Vol. 9
·期 55
·31979-31987
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IF 3.049
Wenbin Wang,Ruidong Xu,Bohao Yu,Xuanbin Wang,Suyang Feng
Electrochemical decomposition of water to produce oxygen (O2) and hydrogen (H2) through an anodic oxygen evolution reaction (OER) and a cathodic hydrogen evolution reaction (HER) is a promising green method for sustainable energy supply. Here, we demonstrate that cauliflower-like S-doped iron microsphere films are materials that can efficiently decompose water as an electrocatalyst for the oxygen evolution reaction. FeSx films are prepared by a simple one-step electrodeposition method and directly grow on copper foam from a deep eutectic solvent, ethaline (mixture of choline chloride and ethylene glycol), as a durable and highly efficient catalyst for the OER in 1.0 M KOH. The prepared FeSx/CF, as an oxygen-evolving anode, shows remarkable catalytic performance toward the OER with a moderate Tafel slope of 105 mV dec−1, and require an overpotential of only 340 mV to drive a geometrical catalytic current density of 10 mA cm−2. In addition, this catalyst also demonstrates strong long-term electrochemical durability. This study provides a simple synthesis route for practical applications of limited transition metal nano catalysts.
研究领域:
材料科学
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电化学
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可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Colloid and Interface Science Communications
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2020
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IF 2.831
Hongye Huang,Yi Cui,Meiying Liu,Ziyang He,Guang Yang,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
In this work, we reported the preparation of nitrogen and FeS x codoped porous carbon through hydrothermal treatment of FeCl 3 , thiourea and porous carbon. The degradation results demonstrated that PC-FeS x composite displayed high degradation efficiency towards organic dyes with excellent reusability. Moreover, the degradation efficiency under alkaline solution (pH = 11) is even better under acidic solution (pH = 3), indicating that other routes for generation free radicals were existed. Electron spin resonance (ESR) spin−trap technique was used to determine the free radical species and results demonstrated that both •OH and O 2 − are formed during Fenton reaction . Considered the facile operation procedure, low cost of reagents and high degradation efficiency, we believe this work should of broad interest for fabrication of multifunctional composites for environmental treatment.
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
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Ruipeng Chen,Xuexia Jia,Xingpeng Huang,Zefeng Mao,Hong Zhang,Huanying Zhou,Shuyue Ren,Zhixian Gao
Arsenic contamination in water poses significant health risks, necessitating effective detection methods to ensure public safety. In this study, a novel FeS x @MOF-808/Ti 3 C 2 T x composite sensor was introduced for the electrochemical detection of arsenite (As(III)), a highly toxic form of arsenic. Based on a straightforward synthetic approach, the composite enhances the sensitivity and selectivity for As(III) detection. The electrochemical performance in various buffer solutions was characterized through square wave anodic stripping voltammetry. The sensor demonstrated exceptional sensitivity with a detection limit of 0.02 ng/mL and a broad linear response range of 0.05–100 ng/mL, surpassing World Health Organization guidelines. Notably, the FeS x @MOF-808/Ti 3 C 2 T x composite exhibited minimal interference from common heavy metals. The superior adsorption properties, attributed to the high surface area and porosity of the composite, facilitated rapid arsenic ion capture. The developed FeS x @MOF-808/Ti 3 C 2 T x sensor offers a robust platform for reliable As(III) detection in diverse water matrices. This innovation contributes to environmental monitoring, providing a cost-effective and efficient method for arsenic detection, particularly in resource-limited regions. The findings underscore the potential of integrating advanced materials into electrochemical sensors, thereby paving the way for future developments in sustainable water quality management.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
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2024
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IF 1.6
Tingting Ge,Hui Guo,Yuchao Li,Jinguo Hao,Yanxia Zheng,Lixi Yang,Haofei Huang,Ming Wang,Cuncun Zuo
Effects of trace oxygen on iron sulphides-supported catalysts (FeS x /γ-Al 2 O 3 ) were evaluated through smelter off-gas reduction process for sulphur synthesis. Catalytic performance was evaluated under different oxygen content conditions. The properties of fresh and used catalysts were investigated by means of X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA), X-ray photoelectron spectroscopy (XPS), and elemental analysis and relationships of active phases and activity were analyzed. The relationship between different active crystal crystals (FeS x , FeS 2 , Fe, FeO, γ-Fe 2 O 3 ) and SO 2 /O 2 adsorption and conversion was investigated. The mechanism of oxygen influence on the FeS x /γ-Al 2 O 3 surface was given and the lifetime of the catalyst in the reaction atmosphere close to real smelter off-gas after dust and oxygen removal steps containing trace oxygen (0.5 O 2 v/v.%) was explored.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Qihuang Huo,Yahui Wang,Huijun Chen,Yu Feng,Lina Han,Weiren Bao,Liping Chang,Jiancheng Wang,Kechang Xie
It is a win–win strategy to prepare mercury sorbents from low-cost high-sulfur raw materials. In part 1, mercury sorbents with excellent performance were prepared from high inorganic sulfur coal through KOH activation. However, this method does not work for high organic sulfur coal. In this work, a two-step preparation method is developed to prepare mercury sorbents from high organic sulfur coal. The first step is the co-pyrolysis/carbonization of Fe 2 O 3 and coal, during which organic sulfur in coal is converted into FeS x . XPS shows that the percentage of S x 2– /S on the surface of the carbonized samples gradually increases from 5.4% to 22.2% with the m(Fe):m(S o ) ratio from 0:4 to 5:4. The second step is KOH activation, and it converts FeS x into various S species, including C-S, S 0 , S 2 2− and S 2− . Among the prepared mercury sorbents, LF+3Fe/4S-A (m(Fe):m(S o ) = 3:4) shows the best mercury removal performance, and its mercury removal efficiency remains above 84% for 120 min under N 2 +O 2 at 120 °C. The Hg-TPDD and XPS results indicate that S*, including C-S, S 0 and S 2 2− , are the major active sites for mercury removal rather than Fe element, and HgS is the main existing form of mercury on the used sorbents. Besides LF coal, this two-step process is also applicable to other high organic sulfur coals (such as LL coal, WJZ coal, and SY coal) and high-sulfur petroleum coke.
研究领域:
环境科学
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Man-Qing Ai,Hao Du,Shuang-Shuang Lv,Xue-Gang Chen,Chu-Qing Zhang,Wei Cai,Wen-Li Qin,Ying Ye,Chun-Hui Tao
Microwave-enhanced degradation is an effective method to remove organic contaminants from aqueous solutions. In this study, we prepared a novel iron sulfide/talc composite. Under microwave irradiation, the hydroxyl and sulfate radicals are rapidly released from the as-prepared FeS x /talc composite (TF), which could remove 106.8 mg/(min·g) of 2,4,6-TCP in 4 min. The maximum chemical oxygen demand (COD) removal was more than 90.1% when the concentration of TF is 1 g/L and the irradiation time of microwave radiation was 5 min, significantly higher than that treated by FeS x particles or talc. It is attributed to the synergetic effect between talc layers and FeS x particles, which greatly enhances the catalytic degradation performance of the composite for organic pollutants . With the advantages of low cost, high physico-chemical stability, and high reusability, this novel FeS x /talc composite could be a potential treating material for rapidly remove organic pollutants from wastewater.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Jianle Wang,Xueming Liu,Zhihua Zhu,Le Yuan,Dongye Zhao,Hong Deng,Zhang Lin
High concentrations of Cr(VI) are often detected in contaminated soil. Yet, cost-effective remediation technologies have been lacking. In this study, we prepared a type of FeS x based on commercial FeSO 4 .7H 2 O and CaS x and tested a microwave-assisted technology based on FeS x for reductive immobilization of high concentrations of Cr(VI) in a field contaminated soil. The as-prepared FeS x particles appeared as a honeycomb-like and highly porous structure. The microwave-assisted FeS x reduction process was able to rapidly reduce the TCLP-based reachability of Cr(VI) from 391.8 to 2.6 mg·L -1 . The dosage of FeS x , S/Fe molar ratio, initial moisture content, microwave power, and irradiation time can all affect the treatment effectiveness. After 500 days curing under atmospheric conditions, the TCLP-leached concentration of Cr remained below the regulatory limit of 5 mg·L -1 , while other treatments failed to meet the goal. S x 2- or S 2- served as the primary electron donors, whereas Fe facilitated the microwave absorption and the formation of the stable final product of FeCr 2 O 4 . S and Fe are mostly precipitated in soil. The microwave-assisted FeS x reduction was shown to be an effective approach to rapidly reduce the leachability of Cr(VI) in contaminated soil, especially in heavily contaminated soil.
研究领域:
环境科学
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土壤修复
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
Catalysts
·
2024
·Vol. 14
·期 5
·324
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IF 3.8
Jing Wang,Lingling Feng,Zikang Zhao,Yan Wang,Ying Zhang,Shan Song,Shengwei Sun,Junshuang Zhou,Faming Gao
Given the energy crisis and escalating environmental pollution, the imperative for developing clean new energy is evident. Hydrogen has garnered significant attention owing to its clean properties, high energy density, and ease of storage and transportation. This study synthesized four types of catalysts—FeS(DI/MB), FeS(ET/MB), Fe(DI/MB), and Fe(ET/MB)—using two distinct solution systems: DI/MB and ET/MB. The FeS(DI/MB) catalyst, synthesized using the layered solution system (DI/MB), demonstrates a uniformly distributed and dense nanosheet structure, exhibiting excellent resistance to strong bases and superior catalytic properties. The FeS(DI/MB) electrode showed OER overpotentials of 460 mV and 318 mV in 1 M and 6 M, respectively, at current densities of up to 500 mA cm−2. Under industrial electrolysis test conditions, the FeS(DI/MB) electrode required only 262 mV to achieve a current density of 500 mA cm−2, operating in a high-temperature, strong alkaline environment of 6 M at 60 °C. Furthermore, the FeS(DI/MB) electrode exhibited excellent OER catalytic activity and stability, as evidenced by a 60 h stability test These findings provide valuable insights into the preparation of iron nickel sulfide-based catalysts, and further in-depth and comprehensive exploration is anticipated to yield the excellent catalytic performance of these catalysts in the realm of electrolytic water hydrogen production.
研究领域:
化学
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能源科学
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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）