Chemistry-An Asian Journal
·
2023
·Vol. 18
·期 10
·e202300085
·
IF 4.1
Weihong Wang,Fanyue Song,Chunfang Du,Yiguo Su
Graphical A sustainable Fe 2 O 3 /SnO 2 composite with fine interfacial feature was prepared and employed for durable peroxymonosulfate activation to eliminate tetracycline. Fe 2 O 3 /SnO 2 displayed the excellent stability and degradation performance due to the synergistic effect between Fe 2 O 3 and SnO 2 . Sustainable Fe 2 O 3 /SnO 2 with fine interfacial feature derived from FeSnO(OH) 5 was prepared and employed for elimination contaminants. The synergistic effect between Fe 2 O 3 and SnO 2 endowed a remarkable degradation performance for tetracycline degradation. Well dispersed SnO 2 can function as fine protective layer to enhance the anchoring of iron ions. In addition, SnO 2 with excellent conductivity can accelerate electron transfer on the surface of Fe 2 O 3 , further activation PMS. Approximately 89.3% of tetracycline (TC) was removed in Fe 2 O 3 /SnO 2 /PMS system, which was higher than alone Fe 2 O 3 /PMS (73.2%) and SnO 2 /PMS (39.7%) systems. The operating parameters were evaluated and studied. Electron paramagnetic resonance (EPR) and quenching tests manifested that 1 O 2 was primary active specie, and ⋅OH, ⋅SO 4 − and ⋅O 2 − were participated in the degradation process. Besides, degradation pathways were proposed by identifying the intermediate products. This work is expected to offer a potential design for construction eco-friendly heterogeneous catalyst toward wastewater treatment.
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PubMed
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Bin Li,Chen-Xuan Li,Yan Wang,Weiyi Xu,Kangping Cui,Xinyuan Zhan,Rui Deng,Xing Zhang
Nano zero-valent iron (nZVI) is extensively used as a peroxymonosulfate (PMS) activator but suffers from the ease of oxidation and agglomeration due to its high surface energy and inherent magnetism. Here, green and sustainable yeast was selected as a support material to firstly in-situ prepare yeast-supported Fe 0 @Fe 2 O 3 and used for activating PMS to degrade tetracycline hydrochloride (TCH), one of the common antibiotics. Due to the anti-oxidation ability of the Fe 2 O 3 shell and the support effect of yeast, the prepared Fe 0 @Fe 2 O 3 /YC exhibited a superior catalytic activity for the removal of TCH as well as some other typical refractory contaminants. The chemical quenching experiments and EPR results demonstrated SO 4 •− was the main reactive oxygen species while O 2 •− , 1 O 2 and • OH played a minor role. Importantly, the crucial role of the Fe 2+ /Fe 3+ cycle promoted by the Fe 0 core and surface iron hydroxyl species in PMS activation was elucidated in detail. The TCH degradation pathways were proposed by LC-MS and density functional theory (DFT) calculation. In addition, the outstanding magnetic separation property, anti-oxidation ability, and high environmental resistance of the catalyst were demonstrated. Our work may inspire the development of green, efficient, and robust nZVI-based materials for wastewater treatment .
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PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Mingxuan Fu,Yuexian Liu,Qi Zhang,Guyang Ning,Xinyu Fan,Haiyang Wang,Haijun Lu,Yufan Zhang,Huan Wang
The synthesis and development of catalyst with efficient electrocatalytic activity and long-term operation stability was a critical of hydrogen production for water splitting, however it is still a challenging step. Herein, a series of different proportion bimetallic uploaded nitrogen-doped graphene materials (Fe 2 O 3 -Co NPs-N-GR) were successfully synthesized through a simple, green and cost-effective method for efficient hydrogen evolution reaction (HER). All of the materials we used were earth-abundant and inexpensive. In this work, employing the interaction between DA and metal ions , Co 2+ and iron (II) phthalocyanine (FePC) were loaded on the graphene oxide (GO). Moreover, the doping of N, reduction of GO and forming of Fe 2 O 3 NPs, Co NPs were realized by one-step calcination method. Among the series of catalysts we synthesized, Fe 2 O 3(1) -Co (1) NPs-N-GR exhibits better HER performance than other catalysts that we synthesized. Fe 2 O 3(1) -Co (1) NPs-N-GR exhibits significant catalytic activity and excellent durability for HER in a wide pH range. The electrocatalytic performance of Fe 2 O 3(1) -Co (1) NPs-N-GR toward HER is better in acidic solution (0.5 M H 2 SO 4 ) than in alkaline solution (1.0 M NaOH), the onset overpotential is 0.36 V, Tafel slope is 66 mV dec −1 and current densities of 10 mA cm −2 at overpotential is 0.39 V. The excellent HER catalytic performance of Fe 2 O 3(1) -Co (1) NPs-N-GR stem from its unique composition and structural properties by combining Fe 2 O 3 -Co nanoparticles and N co-doped graphene. This work provides a new valuable idea for the design of highly active bimetallic N-doped graphene electrocatalyst for HER.
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高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2019
·Vol. 43
·期 13
·7095-7106
·
IF 3.343
Fen Zhou,Liuli Zeng,Wei Guo,Yizhi Yan,Fan Wu,Mu Pan
Summary A series of different α-Fe 2 O 3 nanoparticles composites containing different amounts of graphene coatings have been successfully prepared using a simple electrostatic self-assembly (ESA) method. The structure and electrochemical properties of these α-Fe 2 O 3 @graphene composites have been investigated. The α-Fe 2 O 3 nanoparticles composite containing 40 wt% graphene coating exhibits the highest specific capacity (385 mAh g −1 ) under 1000 mA g −1 , resulting in superior cycle stability with no downward trend after 500 cycles. These results demonstrate that graphene coatings can be used to enhance the electrochemical properties and morphological stability of α-Fe 2 O 3 nanoparticles as anodic materials for high performance lithium-ion batteries (LIBs). The low-energy self-assembly method employed in the paper has good potential for the broad-scale preparation of other graphene-modified materials because of its simplicity and the relatively low temperature conditions.
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高影响因子
FUEL
·
2019
·
IF 5.128
Feifei Li,Xiaodong Wang,Hui Pan,Qiuye Li,Jianjun Yang
In this paper, disk-like α -Fe 2 O 3 nanoparticles were synthesized by one-step via an n-octyl alcohol-mediated self-assembly process and were subsequently used as the catalyst for the updating of heavy crude oil. The characterization results show that the diameter of the as-prepared α -Fe 2 O 3 disks is in the range of 150–200 nm and the nanoparticles have a hematite structure with [1 1 0] preferred orientation. The catalyst strongly acts on the asphaltene and causes its lower S content and N content, lower aromaticity and aromatic condensation, and higher branchiness index. Adding tetralin causes the increment of aromatics content, the decrease of resin, and more molecules containing aromatic moieties bearing 2 and 3 rings. The viscosity of the Shengli extra heavy oil reduced substantially from 161180 mPa∙s to 45882 mPa∙s (50 °C) through the combination of the α -Fe 2 O 3 nanoparticles and tetralin (a hydrogen donor).
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Xinhong Qi,Zhijun Yan,Yang Liu,Xiangcun Li,Gaohong He,Sridhar Komarneni
Ni and Co doped Fe 2 O 3 hollow microspheres of yolk-shell type were designed and synthesized by using resin (RF-COOH) microspheres as hard template and subsequent calcination . Specific morphologies (walnut-like, jingle-bell-like and ball-like) and compositions of Fe 2 O 3 with different amounts of Ni and Co doping were obtained by tuning metal precursor concentration to optimize their performance in lithium-ion battery application. When Ni and Co doped Fe 2 O 3 hollow microspheres were used as anode materials for lithium-ion batteries, jingle-bell-like and ball-like morphologies showed better electrochemical performance with specific capacities of 415.7 and 414.1 mA h/g, respectively up to 200 cycles due to their stable construction with hollow cavity, porous shell and Ni and Co dopants . However, the specific capacity of Ni and Co doped Fe 2 O 3 @TiO 2 hollow microspheres increased to 562 mA h/g. This work showed a new avenue for designing and fabricating yolk-shell hollow structures with specific morphologies and compositions in order to optimize their specific capacity for use in lithium-ion batteries.
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高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 43
·7010-7019
·
IF 3.304
Ming Zhang,Fengqi Zhao,Yanjing Yang,Jiankan Zhang,Na Li,Hongxu Gao
rGO–Fe2O3 composites were prepared using different solvents (distilled water, ethanol, N-methylpyrrolidone, ethyl acetate, n-butyl alcohol and N,N-dimethylformamide) via a simple solvothermal method and characterized by SEM, TEM, XRD, FT-IR, Raman and XPS techniques. Then, the catalytic action of rGO–Fe2O3 composites (prepared in different solvents), GO, rGO and pristine Fe2O3 on the thermal decomposition of ammonium perchlorate (AP) were studied using a TG-DSC instrument. DSC results showed that GO, rGO, pristine Fe2O3 and rGO–Fe2O3 composites could effectively promote the thermal decomposition of AP. Additionally, rGO–Fe2O3 fabricated in N,N-dimethylformamide (DMF) solvent possesses the best catalytic performance among the investigated materials. This result can be attributed to the better dispersibility of Fe2O3 nanoparticles on graphene oxide prepared in DMF solvent, which was confirmed by SEM and TEM imaging. The high temperature decomposition exothermic peak (HTP) and the apparent activation energy of AP are reduced by 119.6 °C and 173.3 kJ mol−1, respectively, in the presence of Fe2O3–rGO (DMF) composite.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Yang Wu,Yu Wang,Zhiqiang Lin,Yingying Wang,Yao Li,Shengwei Liu,Xuchun Gui,Xin Yang
Tetrabromobisphenol A (TBBPA) is one most widely used brominated flame retardant worldwide. In this study, a three-dimensional α-Fe 2 O 3 /amino-functionalization carbon nanotube (α-Fe 2 O 3 /CNT-N) sponge was synthesized and applied for adsorption removal of TBBPA from aqueous solution. The maximum adsorption capacity of TBBPA on the α-Fe 2 O 3 /CNT-N sponge was 41.35 ± 6.09 mg·g −1 at 303 K and pH 7.0 ± 0.1 and the adsorption capacity was maintained in the pH range of 3–7. The adsorbed TPPBA on the α-Fe 2 O 3 /CNT-N sponge can be easily degraded after adding peroxymonosulfate (PMS) to generate hydroxyl and sulfate radicals. The functional groups such as CONH 2 , C O and π–π ∗ bonds played an important role in the activation of PMS. The α-Fe 2 O 3 /CNT-N sponge may be considered to use for water treatment due to its good adsorption capacity, easy separation from water and simple regeneration procedures.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Cheng Tan,Lei Li,Kongzhai Li,Dapeng Zhong
A novel method to separate As from high As-Sb dust using Fe 2 O 3 as a fixative under an O 2 -N 2 atmosphere is proposed. Here, Sb is oxidised and converted to Sb 2 O 4 and FeSbO 4 that remain in the roasted residue, and As is volatilized in the form of As 4 O 6 . The Sb 2 O 3 can be selectively oxidised from the dust by using 21 vol% O 2 , but the formation of amorphous substance (As-Sb-O) hinders the effective separation of As and Sb. Adding Fe 2 O 3 hinders the amorphous substance formation and destroys the structure of the solid solution ((Sb, As) 2 O 3 ) in the raw material by converting the Sb component in it to FeSbO 4 . Therefore, the volatilization rates of As and Sb can reach up to 90.53% and only 13.20%, respectively at a roasting temperature of 723 K, roasting time of 90 min, an Fe 2 O 3 dosage of 15 mass%, and O 2 content of 21 vol%.
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高影响因子
Energies
·
2017
·Vol. 10
·期 9
·1296
·
IF 2.262
Yizhi Yan,Haolin Tang,Fan Wu,Rui Wang,Mu Pan
A cocoon-like α-Fe2O3nanocomposite with a novel carbon-coated structure was synthesized via a simple one-step hydrothermal self-assembly method and employed as supercapacitor electrode material. It was observed from electrochemical measurements that the obtained α-Fe2O3@C electrode showed a good specific capacitance (406.9 Fg−1at 0.5 Ag−1) and excellent cycling stability, with 90.7% specific capacitance retained after 2000 cycles at high current density of 10 Ag−1. These impressive results, presented here, demonstrated that α-Fe2O3@C could be a promising alternative material for application in high energy density storage.Keywords:one-step;self-assembly;α-Fe2O3;carbon coating;supercapacitors
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高影响因子
Catalysis Science & Technology
·
2012
·Vol. 2
·期 7
·1455-1462
·
IF 0
Fa-tang Li,Ying Liu,Zhi-min Sun,Ye Zhao,Rui-hong Liu,Lan-ju Chen,Di-shun Zhao
Mixed-phase Fe2O3 was prepared from Fe(NO3)3 and (C2H5)3NHCl via solution combustion. Photocatalytic oxidative desulfurization of dibenzothiophene (DBT) under simulated sunlight irradiation using mixed-phases of α- and β-Fe2O3 as catalysts was investigated. The DBT in the oil phase was extracted into water phase and then photooxidized to CO2 and SO42− by Fe2O3 and O2 dissolved in water. The Fe2O3 containing 36.6% β-Fe2O3 and 63.4% α-Fe2O3 exhibited the highest photocatalytic activity. Sulfur removal of DBT in n-octane was 92.3% for 90 min irradiation under the conditions of V(water) : V(n-octane) = 1 : 1, air flow rate at 150 mL min−1, and Fe2O3 addition at 0.05 g. The kinetics of photooxidative desulfurization of DBT was a pseudo-first-order with an apparent rate constant of 0.0287 min−1 and half-time of 24.15 min. The sulfur content of the actual diesel could be reduced from 478 μg mL−1 to 44.5 μg mL−1 after 90 min. The radical scavengers experiments and terephthalic acid fluorescence technique indicated that ˙OH and O2˙− were the main reactive species in the DBT photocatalytic degradation. A potential photocatalytic desulfurization mechanism using mixed-phase Fe2O3 was proposed.
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ACS Catalysis
·
2015
·
IF 9.312
Kunfeng Zhao,Hailian Tang,Botao Qiao,Lin Li,Junhu Wang
Au/γ-Fe2O3 and Au/α-Fe2O3 catalysts with identical size of Au nanoparticles, chemical state of Au species, and amount of surface OH– group were prepared. The Au/γ-Fe2O3 catalyst exhibited exceptionally high activity, regardless of the heat treatments. The CO-TPR, sequential pulse reaction, and in situ Raman spectra demonstrate that the much higher activity of Au/γ-Fe2O3 originated from its higher redox property at low temperature. Systematic study shows that this higher-redox-property-based higher activity could be extended to γ-Fe2O3-supported Pt-group metals and to other reactions that follow Mars–Van Krevelen mechanism. This finding may provide a new avenue for catalyst improvement or development by choosing the suitable crystal phase of the oxide support.
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高影响因子
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