International Journal of Minerals Metallurgy and Materials
·
2022
·Vol. 29
·期 7
·1464-1473
·
IF 3.85
Song Mengchen,Zhang Liuting,Zheng Jiaguang,Yu Zidong,Wang Shengnan
Novel graphene-supported FeOOH nanodots (FeOOH NDs@G) were successfully prepared by a facile hydrothermal method and doped into MgH 2 through mechanical ball-milling. MgH 2 with 10wt% FeOOH NDs@G began to release hydrogen at 229.8°C, which is 106.8°C lower than that of pure MgH 2 . The MgH 2 -10wt% FeOOH NDs@G composite could reversibly absorb 6.0wt% hydrogen at 200°C under a 3.2 MPa hydrogen pressure within 60 min. With the addition of FeOOH NDs@G, the dehydrogenation and hydrogenation activation energy of MgH 2 was decreased to 125.03 and 58.20 kJ·mol −1 (156.05 and 82.80 kJ·mol −1 for pure MgH 2 ), respectively. Furthermore, the hydrogen capacity of the FeOOH NDs@G composite retained 98.5% of the initial capacity after 20 cycles, showing good cyclic stability. The catalytic action of FeOOH NDs@G towards MgH 2 could be attributed to the synergistic effect between graphene nanosheets and in-situ formed Fe, which prevented the aggregation of Mg/MgH 2 particles and accelerated the hydrogen diffusion during cycling, thus enabling the MgH 2 -10wt% FeOOH NDs@G composite to exhibit excellent hydrogen storage performance.
研究领域:
材料科学
·
氢存储
·
纳米材料
·
催化
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2021
·Vol. 8
·期 19
·3643-3650
·
IF 4.59
Yadong Li,Baojin Chen,Huaming Zhang,Jing Gao,Huachuan Sun,Aziz Habibi-Yangjeh,Chundong Wang
Graphical Dual purpose : A FeOOH@NiTe hybrid nanorod arrays on Ni foam was synthesized as electrocatalyst for the oxygen evolution reaction, exhibiting excellent OER activity and long-term stability. The synthesized NiTe@FeOOH/NF also shows enhanced catalytic performance for the urea oxidation reaction. Hydrogen is the most promising alternative energy source in the face of energy crisis, and water splitting is a green strategy for hydrogen generation. The oxygen evolution reaction (OER) is the essential half-reaction in electrochemical water splitting, and thus development and exploration of electrocatalysts with excellent performance are vital to prompt the application of OER. Due to the unique electronic properties of NiTe and strong synergistic interaction between NiTe and FeOOH, NiTe@FeOOH hybrid nanorods were successfully fabricated on Ni foams (NF) by a hydrothermal reaction step and another in-situ growth step for the first time without consuming any extra energy. The 3D structure of the NiTe@FeOOH/NF was confirmed by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and energy dispersive spectrometry (EDS) mapping technologies. Electrochemical measurements showed that the as-prepared NiTe@FeOOH/NF needs only an overpotential of 241 mV to achieve a current density of 10 mA cm −2 in 1.0 M KOH and requires 1.341 V to drive 10 mA cm −2 in 1 M KOH with a 0.33 M urea, showing excellent long-term stability. The NiTe@FeOOH/NF as the bifunctional electrocatalyst in an electrolyzer shows high efficiency with a cell voltage of 1.50 V at 10 mA cm −2 . This work can provide a new efficient method to construct highly active and cost-effective OER catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Haidong Luo,Shuai Dong,Suhang Chen,Fengqi Zhao,Kangzhen Xu
Photocatalytic-Fenton synergistic degradation of pollutants in wastewater is considered a promising technology for environmental treatment. Herein, FeOOH quantum dots decorated La-doped Bi 4 O 5 I 2 hybrids were prepared using an in-situ deposition strategy and applied for the removal of 2,4-dinitrophenylhydrazine. The FeOOH-1/La 10 -Bi 4 O 5 I 2 sample exhibits the highest catalytic activity in degradation experiments, eliminating 93.8 % of 2,4-dinitrophenylhydrazine within 30 min at a reaction rate constant of 0.117 min −1 . In addition, the impacts of several operational parameters on the catalytic activity were comprehensively examined, including H 2 O 2 concentration, catalyst dosage, reaction solution pH and co-existing ions. In degradation process of 2,4-dinitrophenylhydrazine, the major reactive oxygen species are ·OH and ·O 2 – , with ·OH generated by Fenton reaction. Optical property characterization, cyclic voltammetry tests, and photoelectrochemical measurements confirmed that the FeOOH-1/La 10 -Bi 4 O 5 I 2 composite has excellent light absorption capacity, abundant active centers, and excellent carrier separation efficiency. Finally, the degradation mechanism of FeOOH-1/La 10 -Bi 4 O 5 I 2 composites for 2,4-dinitrophenylhydrazine is rationally discussed based on experimental and theoretical calculations. This study presents a fresh design idea for developing bismuth oxyhalide-based composites with high activity.
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
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Shunli Wan,Yan Li,Shuo Cheng,Guowei Wu,Xuan Yang,Yu Wang,Liangmin Gao
Metallic oxide nanoparticles (NPs) anchored in biochar provide a promising measure forward into the scaled-up application of these NPs in water treatment , and reducing the size of the dwelled NPs is expected to boost the adsorption performance of biochar-based composites because of the size and surface effect. Nevertheless, it is still of great challenge to regulate the size of the impregnated NPs due to their intrinsic self-agglomeration caused by high surface energy . In this study, we fabricated the charged biochar (C-BC) bearing high-density negatively charged groups (i.e., carboxyl and hydroxyl groups) via HNO 3 oxidization to load the model metal oxide FeOOH NPs. The average sizes of anchored FeOOH NPs were ultrasmall, ranging from 19.9 ± 1.5 to 3.1 ± 0.5 nm, and decreased with the increased amount of carboxyl and hydroxyl groups in C-BC. Whether in batch adsorption or fixed-bed column setting, adsorption of Cd(II) onto the as-made composites was greatly enhanced by carboxyl and hydroxyl groups in carrier. The normalized adsorption capacities of Cd(II) by ferric mass of the loaded FeOOH were 499.9–724.9 mg/g-Fe, approximately 18.6–27.1 and 2.51–3.64 folds over the bulky FeOOH and FeOOH-impregnated biochar. Our study results should provide a significant reference on how to acquire highly efficient biochar-based composites for water decontamination .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2023
·
IF 7.4
Jinwei Wang,Yiquan Xiang,Weiyi Zhang,Yijie Zhang,Qiang Zhao,Jinping Li,Guang Liu
Developing a non-noble metal-based oxygen evolution electrocatalyst that works under high current densities is a challenging task in hydrogen production by water splitting. Herein, an efficient OER electrocatalyst was formed by combining Cr-doped FeOOH with high OER activity and FeSe 2 with high conductivity. Through the addition of FeSe 2 and the incorporation of Cr ion, the conductivity and intrinsic activity of the obtained Cr-FeOOH/FeSe 2 /NF towards OER are dramatically enhanced. To specific, the required overpotential is only 242 mV to realize the current density of 100 mA/cm 2 . In addition, the Cr-FeOOH/FeSe 2 /NF can output large current densities at industrial level, which only needs the overpotential of 293 and 336 mV to deliver the current density of 500 and 1000 mA/cm 2 , respectively. In addition, the overpotential is as low as 291 mV to attain 1000 mA/cm 2 in 30 wt% KOH solution. More importantly, the obtained Cr-FeOOH/FeSe 2 /NF electrode can stable work for 80 h at such a high current density of industrial level, and the overpotential does not increase significantly. This result suggests that the obtained electrocatalyst has latent capacity for industrial application. This work points out the direction for building high-performance oxygen evolution electrocatalysts at large current densities.
研究领域:
材料科学
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电化学
·
能源转换与储存
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Xiaozeng Miao,Huiwang Dai,Jianxin Chen,Jianxi Zhu
An enhanced method of hydroxyl radical generation was studied to lead a better understanding of the catalytic mechanism of α-FeOOH in UV-Fenton system. The catalyst was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption–desorption isotherms and scanning electron microscope. The Orange II degradation and hydroxyl radical concentration under different conditions were studied in detail. The results showed that the hydroxyl radical was mainly oxidizing species for Orange II degradation. And the hydroxyl radical generation included both homogeneous and heterogeneous UV-Fenton processes. In heterogeneous UV-Fenton system, the additional oxalate could increase the ratio of homogeneous UV-Fenton process for hydroxyl radical generation. In oxalate enhanced system, the peak value of hydroxyl radical concentration would increase to 11.314 μmol/L which was nearly twice as it in heterogeneous UV-Fenton system (5.978 μmol/L). The k values of Orange II discoloration and mineralization increased to 0.386 min −1 and 0.044 min −1 , which were 1.169 and 0.692 times as that in heterogeneous UV-Fenton system (0.178 min −1 and 0.026 min −1 ). After treatment, the total iron ions concentration decreased to 2.357 μmol/L in oxalate enhanced system. The results indicated that additional oxalate was a promising enhanced method for hydroxyl radical generation in heterogeneous UV-Fenton system with α-FeOOH as catalyst.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 8
·1918
·
IF 5
Rui Zhou,Wusong Xu,Peisen Liu,Shangyuan Zhao,Gang Xu,Qizhong Xiong,Weifeng Zhang,Chaochun Zhang,Xinxin Ye
Phosphorus is one of the important metabolic elements for living organisms, but excess phosphorus in water can lead to eutrophication. At present, the removal of phosphorus in water bodies mainly focuses on inorganic phosphorus, while there is still a lack of research on the removal of organic phosphorus (OP). Therefore, the degradation of OP and synchronous recovery of the produced inorganic phosphorus has important significance for the reuse of OP resources and the prevention of water eutrophication. Herein, a novel FeOOH-loaded aminated polyacrylonitrile fiber (PANAF-FeOOH) was constructed to enhance the removal of OP and phosphate. Taking phenylphosphonic acid (PPOA) as an example, the results indicated that modification of the aminated fiber was beneficial to FeOOH fixation, and the PANAF-FeOOH prepared with 0.3 mol L−1Fe(OH)3colloid had the best performance for OP degradation. The PANAF-FeOOH efficiently activated peroxydisulfate (PDS) for the degradation of PPOA with a removal efficiency of 99%. Moreover, the PANAF-FeOOH maintained high removal capacity for OP over five cycles as well as strong anti-interference in a coexisting ion system. In addition, the removal mechanism of PPOA by the PANAF-FeOOH was mainly attributed to the enrichment effect of PPOA adsorption on the fiber surface’s special microenvironment, which was more conducive to contact with SO4•−and •OH generated by PDS activation. Furthermore, the PANAF-FeOOH prepared with 0.2 mol L−1Fe(OH)3colloid possessed excellent phosphate removal capacity with a maximal adsorption quantity of 9.92 mg P g−1. The adsorption kinetics and isotherms of the PANAF-FeOOH for phosphate were best depicted by pseudo-quadratic kinetics and a Langmuir isotherm model, showing a monolayer chemisorption procedure. Additionally, the phosphate removal mechanism was mainly due to the strong binding force of iron and the electrostatic force of protonated amine on the PANAF-FeOOH. In conclusion, this study provides evidence for PANAF-FeOOH as a potential material for the degradation of OP and simultaneous recovery of phosphate.Keywords:polyacrylonitrile fiber;FeOOH;activate peroxydisulfate;organic phosphorus;adsorption
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
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 3
·470-479
·
IF 1.307
Xiang Huilin,Zhong Lingling,Ren Yongqing,Liu Dongmei,Zhu Zhigao,Xu Ying,Wang Yu,Wang Wei
W ater flux and hydrophobic durability play important roles in membrane distillation(MD) applications. Compared with the method of adsorbing nanoparticles by electrostatic adsorption, the surface roughness constructed by chemical bonding is more conducive to the performance of membrane. This paper reports a facile approach to fabricating superhydrophobic fluoroalkyl silane/polydimethylsiloxane@FeOOH@stabilized polyacrylonitrile(FAS/PDMS@FeOOH@SPAN) nanofibrous membrane(NFM) with outstanding hierarchical structures, aiming to achieve efficient and stable performance in MD. Electrospun polyacrylonitrile(PAN) membrane after peroxidation was chosen as the base membrane, followed by in-situ synthesis of iron oxyhydroxide and liquid-phase silanization. We tested the characteristics of FAS/PDMS@FeOOH@SPAN NFM in each preparation stage and its performance in direct contact membrane distillation(DCMD). The chemical bond between iron oxyhydroxide and the membrane is stronger, making the rough structure steady and dense. The FAS/PDMS@FeOOH@SPAN NFM exhibited a water contact angle of 155.4° and excellent hydrophobicity towards different pollutants. Besides, it showed satisfied properties with a water flux of 24.7 L·m −2 ·h −1 , a high salts rejection of ca. 100% and an extended-term stability in DCMD using hypersaline water(10%, mass ratio). It is believed that this novel study proposes a universal and efficient method to fabricate a superhydrophobic surface and has great potential for high-salinity wastewater treatment in MD.
研究领域:
材料科学
·
环境工程
·
水处理
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2022
·
IF 5.479
Qinglong Luo,Mingzhe Dong,Quan Li,Zhijian Wu,Zhong Liu,Jun Li
The selective extraction of lithium from brine by lithium aluminum layered double hydroxides (Li/Al-LDHs) adsorption is used industrially. To maintain the structural and performance stability of the Li/Al-LDHs adsorbent, the Li/Al-LDHs adsorbent can be doped with some high electron density metals such as Fe(III) and regenerated by dilute Li-containing aqueous solution. In this study, we use Fe(III) doping and FeOOH nanocomposite to stabilize the structure of Li/Al-LDHs. The nanocomposites of Li/Al-LDHs, Fe dopped Li/Al-LDHs (Fe-Li/Al-LDHs), and FeOOH were synthesized by the phase-separated sol–gel method and granulated by using crosslinked alginate polymers. The nanocomposites and granulated nanocomposites were characterized by SEM, TEM, XPS, FT-IR, and XRD analyses. The adsorption–desorption performance of the granulated nanocomposites was evaluated with a single LiCl solution and the brine from Da Qaidam Salt Lake. The isotherms, kinetics, and thermodynamics parameters and Arrhenius parameters of the lithium adsorption of the granulated nanocomposites were obtained. At the 80% mass loading of the nanocomposites in the granulation, the granulated nanocomposites statically adsorbed 9.46 mg/g lithium and dynamically 8.18 mg/g lithium from Da Qaidam Salt Lake brine. The Fe(III) doping and nanocomposite with FeOOH reduced the dissolution of the Li/Al-LDHs in the granulated nanocomposites and did not negatively affect the adsorption capacity of the granulated nanocomposites.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yi Peng,Ying Yan,Jing Wang,Ziyang Xiang,Yanmei Li,Junhui Yang,Jinglin Yin,Wenlei Wang,Hongbo Xiao
In this study, CdSe cluster-modified biogenic α − FeOOH based on macroporous biochar was constructed from rhizosphere iron plaque via pyrolysis. An ultrahigh H 2 O 2 production rate of 655.75 μmol/L was achieved by the photocatalysis-self-Fenton system within 30 min under visible light irradiation. α-FeOOH, with abundant iron ions, can directly activate H 2 O 2 to produce abundant ⋅OH radicals. It was found that As(III) (10 mg/L) could be completely degraded within 20 min. Electron spin resonance spectroscopy (ESR) and density functional theory (DFT) revealed that a suitable energy band structure was achieved by the introduction of CdSe clusters; thus, O 2 was mainly reduced to H 2 O 2 through a two-electron reduction route in the reaction system. The photogenerated electrons promoted the conversion of Fe(III)/Fe(II) by reacting with Fe(III) in α-FeOOH. The presence of H 2 O 2 and Fe 2+ in this system accelerates the oxidation of As(III) by a Fenton-like reaction.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Longfei Zhang,Na Yang,Yuhang Han,Xiang Wang,Luhong Zhang,Yongli Sun,Bin Jiang
Heterogeneous advanced oxidation process performs a promising perspective in the field of refractory pollutant degradation. However, the agglomeration and difficulty-to-recycle characters of the heterogeneous catalysts greatly impede its further development. In this study, membrane-confined pores were employed as the immobilization support to anchor highly dispersed β-FeOOH via an in situ mineralization method, which not only exposed highly active sites for refractory pollutants degradation but also endowed the membrane with hydrophilic/underwater superoleophobic properties. Accordingly, the Polyvinylidene fluoride/β-FeOOH (PVDF/β-FeOOH) catalytic membrane demonstrated favorable separation capacity and attractive catalytic oxidation performance via activating peroxymonosulfate. Instantaneous degradation (contact time about 1 s) of recalcitrant pollutants (over 98%) and high oil rejections (96.4% to 99.1%) can be achieved simultaneously under low operating pressure. Both the confined pore structure-induced enhanced mass transfer and enrichment of radicals and pollutants lead to favorable catalytic degradation performance. The mechanism of the catalytic membrane was analyzed by radical quenching test and electron paramagnetic resonance analysis, proving that sulfate radicals were predominant reactive oxygen species during catalytic oxidation. Besides, the PVDF/β-FeOOH catalytic membrane also possessed attractive stability without tedious catalyst separation/recovery processes. This work provides a meaningful tactic to further enhance the catalytic oxidation performance of catalytic membrane in water treatment.
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
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Kaixiang Ji,Shiyu Xia,Xueqing Sang,Abdallah M. Zeid,Altaf Hussain,Jianping Li,Guobao Xu
FeOOH nanorods, as one-dimensional nanomaterials, have been widely used in many fields due to their stable properties, low cost, and easy synthesis, but their application in the field of chemiluminescence (CL) is rarely reported. In this work, FeOOH nanorods were synthesized by a simple and environmentally friendly one-pot hydrothermal method and used for the first time as a catalyst for generating strong CL with luminol without additional oxidant. Remarkably, luminol-FeOOH exhibits about 250 times stronger CL than the luminol-H2O2 system. Its CL intensity was significantly quenched by uric acid. We established a simple, rapid, sensitive, and selective CL method for the detection of uric acid with a linear range of 20–1000 nM and a detection limit of 6.3 nM (S/N = 3). In addition, we successfully applied this method to the detection of uric acid in human serum, and the standard recoveries were 95.6–106.4%.
研究领域:
分析化学
·
生物医学
✓ 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）