JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2016
·
IF 3.958
Tao Meng,Pengfei Xie,Hengfei Qin,Huan Liu,Weiming Hua,Xi Li,Zhen Ma
Xie et al. reported that Fe 2 O 3 /SiO 2 spheres with a surface area of 111 m 2 /g could be hydrothermally transformed into Fe 2 O 3 /Silicalite-1 nanowires in the presence of ethylenediamine and triethylamine. The resulting material was found to be active for CO oxidation and N 2 O decomposition due to the presence of small (1–2 nm) Fe 2 O 3 nanoparticles [P.F. Xie et al., Microporous Mesoporous Mater. 200 (2014) 52–60; P.F. Xie et al., J. Mol. Catal. A 409 (2015) 50–58]. In the current work, commercial amorphous SiO 2 spheres with a low specific surface area of 9.5 m 2 /g were found to be transformed into amorphous SiO 2 nanowires via hydrothermal treatment at 200 °C, in the presence of a mixture of ethylenediamine, triethylamine, and Fe(NO 3 ) 3 , for several days. The Fe 3+ species, in the presence of ethylenediamine and triethylamine, not only catalyzed the morphological transformation of SiO 2 , but also got deposited onto the SiO 2 nanowires, forming supported Fe 2 O 3 nanoparticles (2–4 nm in diameter) upon subsequent calcination to remove the organic templates. For comparison, Fe 2 O 3 /SiO 2 spheres prepared by impregnation had big Fe 2 O 3 particles (as large as 50 nm). Both the SiO 2 supports and supported Fe 2 O 3 particles were characterized by various techniques. The catalytic performance was studied, using N 2 O decomposition, CO oxidation, and photocatalytic reduction of Cr(VI) as probe reactions. Implications of the findings are discussed.
研究领域:
材料化学
·
纳米材料
·
催化
·
环境修复
·
无机合成
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Zhanghua Zou,Wei Xiao,Yanhua Zhang,Hong Yu,Wenjie Zhou
We report the design of a freestanding cellulose/RGO/silver/Fe 2 O 3 hybrid film for direct use as electrodes for construction of high-performance flexible solid-state supercapacitor (FSS). It is well characterized and found to feature noticeable capacitive properties due to the unique structure, high conductivity and dual electroactive species (i.e., RGO and Fe 2 O 3 ) for charge storage. As demonstrated in a three-electrode system, such film electrode achieves the maximum areal and volumetric capacitance of 2044 mF cm −2 and 75.7 F cm −3 , respectively, with prominent rate performance and long-term cyclic durability. Later, a symmetric FSS device is constructed by employing this film as both anode and cathode electrodes. The as-assembled device offers the highest areal and volumetric capacitance of 1132 mF cm −2 and 18.2 F cm −3 , respectively, displays inconspicuous performance degradation under different curved states, and possesses the largest areal energy density of 226.4 μWh cm −2 , which is far better than that of many advanced symmetric and asymmetric flexible supercapacitors. The attractive capacitive behaviors and easy fabrication processes could render cellulose/RGO/silver/Fe 2 O 3 hybrid film a promising material for the applications in next-generation flexible and wearable electronics in the future.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2017
·Vol. 4
·期 8
·1682-1691
·
IF 6.047
Jun Tang,Ningyuan Zhu,Yan Zhu,Philip Kerr,Yonghong Wu
The roles of different extracellular polymeric substance (EPS) fractions in microbial communities, such as periphytic biofilms, are unclear. In this study, three EPS fractions extracted from a periphytic biofilm were employed to investigate their ability to affect Fe2O3 nanoparticle (IONP) toxicity. The addition of IONPs promoted the production of EPS and reactive oxygen species. The bound EPS protected the microbial cells in the periphytic biofilm from oxidative damage caused by IONPs. Different EPS fractions had different roles in affecting IONPs via different mechanisms, specifically, the soluble EPS increased the hydrodynamic diameter of IONPs and promoted IONP aggregation, the flocculation efficiency of the tightly bound EPS increased during exposure to IONPs, and the loosely bound EPS presented high biosorption of IONPs. The binding of IONPs with abundant functional groups was the main combination mode between different EPS fractions and IONPs. The beneficial changes in composition, structure and functional groups of EPS during exposure to IONPs in turn facilitate the elimination of their toxicity. This study contributes to a better understanding of the resistance mechanism of the periphytic biofilm to IONP exposure and the roles of EPS fractions in defending against nanotoxicity.
研究领域:
微生物学
·
环境毒理学
·
生物膜研究
·
纳米材料生物学效应
·
生态毒理学
✓ 已验证
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 5
·1945
·
IF 3.4
Yuan Chen,Feihong Liu,Yufei Zhao,Mengdie Ding,Juan Wang,Xuan Zheng,Huihu Wang,Marie-Christine Record,Pascal Boulet
In this study, lychee-like TiO2@Fe2O3microspheres with a core-shell structure have been prepared by coating Fe2O3on the surface of TiO2mesoporous microspheres using the homogeneous precipitation method. The structural and micromorphological characterization of TiO2@Fe2O3microspheres has been carried out using XRD, FE-SEM, and Raman, and the results show that hematite Fe2O3particles (7.05% of the total mass) are uniformly coated on the surface of anatase TiO2microspheres, and the specific surface area of this material is 14.72 m2g−1. The electrochemical performance test results show that after 200 cycles at 0.2 C current density, the specific capacity of TiO2@Fe2O3anode material increases by 219.3% compared with anatase TiO2, reaching 591.5 mAh g−1; after 500 cycles at 2 C current density, the discharge specific capacity of TiO2@Fe2O3reaches 273.1 mAh g−1, and its discharge specific capacity, cycle stability, and multiplicity performance are superior to those of commercial graphite. In comparison with anatase TiO2and hematite Fe2O3, TiO2@Fe2O3has higher conductivity and lithium-ion diffusion rate, thereby enhancing its rate performance. The electron density of states (DOS) of TiO2@Fe2O3shows its metallic nature by DFT calculations, revealing the essential reason for the high electronic conductivity of TiO2@Fe2O3. This study presents a novel strategy for identifying suitable anode materials for commercial lithium-ion batteries.Keywords:lithium-ion batteries;anode materials;TiO2@Fe2O3microspheres;electrochemical properties;first-principles calculations
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yan Wang,Ming Liu,Haibing Liu,Junhang Ding,Tian Wang,Jinfeng Dong,Bingbing Wang,Xing Tian,Yanzhi Xia
Search for anode materials for sodium ions batteries (SIBs) attracts researchers around the world because of their high-rate capability and excellent capacity. However, their stability needs to be improved. Thus, this work demonstrates a controllable method for the synthesis of one-dimensional (1D) hollow microfibers using “egg-box-structured” Fe-alginate fibers. The goal was to obtain an SIBs anode material with the optimal number of voids for efficient Na + storage. An optimized micro and pore structures were designed to obtain the shortest Na + -diffusion distance. The novel FeS 2 /Fe 2 O 3 -HF composite was able to withstand volume expansion during charge/discharge processes and showed high specificity and rate capacity (483 mAh/g at 100 mA/g, 241 mAh/g at 2000 mA/g). The capacity retention of this cell was excellent: it maintained 245 mAh/g over four hundred 1000 mA/g cycles. Thus, FeS 2 /Fe 2 O 3 -HF composite is a very promising active anode material for SIBs.
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 2
·329
·
IF 3.9
Xueqing Ren,Peng Xu,Ke Tian,Menghan Cao,Fengyin Shi,Guangshan Zhang
The post-separation of powder catalysts restricts the practical application of peroxymonosulfate (PMS)-based advanced oxidation technology. Hence, we fabricated CuO-Fe2O3-modified Ni foam (CFO-NF) using a facile hydrothermal method for an efficient PMS activation. The CFO-NF/PMS system could achieve a 97.9% tetracycline hydrochloride (TC) removal efficiency in 60 min with four pieces of CFO-NF and 0.4 mmol L−1of PMS. The removal efficiency was maintained at ˃85% even after five cycles, indicating the excellent stability of CFO-NF composites. The conversion among Fe(III)/Fe(II), Cu(II)/Cu(I), and Ni(III)/Ni(II) accelerated the PMS decomposition, verifying the synergy between CuO-Fe2O3and Ni foam. The trapping experiments and EPR detection confirmed that abundant active species (•OH, SO4•−, O2•−, and1O2) were produced in the CFO-NF/PMS system, accounting for the existence of radical pathways and a non-radical pathway, in which1O2(non-radical pathway) was dominated. This study developed a novel CuO-Fe2O3-modified Ni foam with a superior PMS activation performance, a high stability, and a recoverability for eliminating refractory organic pollutants.Keywords:CuO-Fe2O3-modified Ni foam;peroxymonosulfate;tetracycline;stability;singlet oxygen
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yaqiao Liu,Shuozhen Hu,Xinsheng Zhang,Shigang Sun
Fe 2 O 3 is a promising n -type semiconductor as the photoanode of photoelectrochemical water-splitting method due to its abundance, low cost, environment-friendly, and high chemical stability. However, the recombination of photogenerated holes and electrons leads to low solar-to-hydrogen efficiency. In this work, to overcome the recombination issue, a p-type semiconductor, CuO, is introduced underneath the γ-Fe 2 O 3 to synthesize γ-Fe 2 O 3 /CuO on the FTO substrate. Along with the formation of p-n heterojunction , CuFe 2 O 4 is in situ generated at the interface of γ-Fe 2 O 3 and CuO. The existence of Cu 2 O in CuO and CuFe 2 O 4 promotes the charge transfer from CuO to γ-Fe 2 O 3 and within CuFe 2 O 4 , respectively, resulting in creating an internal electric field in γ-Fe 2 O 3 /CuO and leading to the conduction band of CuO bending up and γ-Fe 2 O 3 bending down. Additionally, Cu(II) in CuFe 2 O 4 contributes to fast electron capture. Consequently, the charge transfer efficiency and charge separation efficiency of photo-generated holes are promoted. Hence, γ-Fe 2 O 3 /CuO exhibits an enhanced photocurrent density of 13.40 mA cm −2 (1.9 times higher than γ-Fe 2 O 3 ). The photo corrosion resistance of CuO is dramatically increased with the protection of CuFe 2 O 4 , resulting in superior high chemical stability, i.e. 85% of the initial activity remains after a long-term test.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jingquan Wang,Weijun Zhang,Huan Wu,Feng Su,Quanyi Dai,Zhanxin Jiang,Chuancai Kong,Zhimao Yang,Tong Wang,Hao Zhu
In this study, multi-morphological g-C 3 N 4 / Fe 2 O 3 were prepared via hydrothermal supramolecular preorganization for the removal of formaldehyde in simulated indoor environments . We synthesized bulk, spherical and tubular g-C 3 N 4 under hydrothermal conditions and subsequently attached Fe 2 O 3 nanoparticles by impregnation method. Tubular g-C 3 N 4 /Fe 2 O 3 (27.46 m 2 /g) and spherical g-C 3 N 4 /Fe 2 O 3 (33.50 m 2 /g) synthesized through hydrothermal supramolecular preorganization method possessed the higher specific surface area than bulk g-C 3 N 4 /Fe 2 O 3 (11.05 m 2 /g). Among three morphologies of g-C 3 N 4 /Fe 2 O 3 , tubular g-C 3 N 4 /Fe 2 O 3 exhibited the best performance (65%) than bulk (41%) and spherical (59%) and possessed favorable stability. In addition, we explored and optimized the effects of different indoor simulation conditions (formaldehyde concentration, relative humidity, light source power) on the photocatalytic removal of formaldehyde. The mechanism was proposed that g-C 3 N 4 /Fe 2 O 3 formed Z-type heterojunction to promote the separation of photo-generated electrons and holes, further generating hydroxyl radical and superoxide radical to oxidize formaldehyde.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xuemei Zeng,Yihang Ruan,Qi Chen,Shuangqian Yan,Wei Huang
Designing nanozyme hybrids with cascade catalytic activities and coupling effects has significant promises in tumor therapy through concerted effects. In this work, a goethite-derived porous Fe 2 O 3 /Au hybrid nanozyme was fabricated for synergistic treatment of triple negative breast cancer. The as-prepared porous Fe 2 O 3 nanoparticle exhibits excellent peroxidase-like activity compared to goethite particles, which can generate hydroxyl radicals in the tumor microenvironment. Furthermore, the Fe 2 O 3 nanoparticle induces ferroptosis through intracellular lipoperoxide accumulation. After decorating glucose oxidase-mimicking gold nanoparticles, the Fe 2 O 3 /Au hybrid nanozyme is able to catalyze glucose into gluconic acid and H 2 O 2 . The glucose consumption deprives the energy of the tumor cell, and the generated H 2 O 2 can be converted to hydroxyl radicals through the biocatalytic reaction. Importantly, the coupling of gold nanoparticles enhances the photothermal conversion of the porous Fe 2 O 3 nanoparticle. Thus, the designed Fe 2 O 3 /Au hybrid nanozyme can be used for tumor therapy through starvation, cascade catalytic reactions, ferroptosis, and photothermal manners. This work presents a derivative method that transforms minerals into nanozyme and couples nanozymes for synergistic tumor therapy, shedding light on the rational design of nanozyme composites for biomedicine.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Xiaotong Li,Xufei Shao,Zhisheng Wang,Jinzhu Ma,Hong He
Catalytic decomposition is a promising method of ozone (O 3 ) removal, and Ag-based catalysts have shown excellent O 3 decomposition performance. In this study, the chemical states of Ag species were successfully regulated by varying the loading of Ag and the particle size of α-Fe 2 O 3 supports, and the O 3 decomposition performance of different Ag species (monatomic Ag, Ag clusters (1–2 nm), small Ag nanoparticles (3–5 nm), large Ag nanoparticles (7–12 nm)) was determined. The changes undergone by Ag species after exposure to ozone were characterized in detail, and the ozone decomposition performance of the corresponding Ag species was determined. The terminal and doubly bridging hydroxyl groups on the Fe 2 O 3 support were determined to be the anchoring sites for Ag species. The Ag species and Fe 2 O 3 support are connected through oxygen bridges, forming Ag-O-Fe linkages. This study provides guidance for understanding the mechanism of the interaction between metals and supports and follow-up development of high-efficiency Ag-based catalysts.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Fanyue Meng,Chenbin Lin,Bing Song,Lei Yu,Yan Zhao,Zejian Zhi,Min Song
This study employed a self-designed underwater arc discharge (UAD) plasma reactor, which combined advanced oxidation process (Fe 2 O 3 -CoFe 2 O 4 /PMS) and low-temperature plasma technology to efficiently degrade refractory organic pollutants (i.e. phenol, p-chlorophenol, p-nitrochlorobenzene). The results illustrated that the plasma/PMS/Fe 2 O 3 -CoFe 2 O 4 system possessed high degradation efficiency and TOC removal rate towards three target pollutants (phenol: 99.8%, 96.12%; 4-CP: 98.4%, 86.48%; p-NCB: 99.9%, 88.31%). With the help of in-situ variable temperature EPR and Indigo colorimetry method, ·OH, SO 4 ·- , O 2 ·- , 1 O 2 and O 3 were identified as the main reactive oxygen species (ROS) for the degradation of target pollutants, revealing the synergistic catalytic mechanism between plasma and Fe 2 O 3 -CoFe 2 O 4 for PMS activation and inferring the degradation pathways of target pollutants. The results confirmed that the plasma/PMS/Fe 2 O 3 -CoFe 2 O 4 system was feasible for the degradation of refractory organic pollutants, has the advantages of high efficiency and low energy consumption, and could provide an effective strategy for the treatment of refractory organic pollutants in groundwater/soil.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yifan Feng,Xu Huang,Huifang Wu,Dawei Li,Yi Sun
Nanomaterials coated ceramic membranes have become one of the most promising methods to degrade organic pollution. In this study, low crystalline metal nanomaterials were coated on ceramic membranes for the first time. This research fabricated a ceramic membrane with low crystalline Fe 2 O 3 @carboxylic multi-walled carbon nanotubes (CMWCNTs) and evaluated its aromatic compounds-degrading ability and self-cleaning ability. The coated membrane demonstrated an excellent removal rate (＞90%) of phenol and atrazine in 120 min’s continuous flow filtration via surface photo-Fenton reaction. Quenching experiments reveal the active substances of the reaction system were singlet oxygen ( 1 O 2 ) and a small amount of hydroxyl radical (·OH). With humic acid (HA) and bovine serum albumin (BSA) as model pollutants, the polluted membranes recovered 84.4% and 77.0% flux through the photo-Fenton reaction respectively, which proved the self-cleaning performance of the coated membrane. After 6 cycles, an average degradation efficiency of 92% for phenol was maintained in continuous flow filtration. These results indicated the efficacy of the photo-Fenton coupling coated membrane for treating organically polluted water and its relevance for the design and application of future photo-Fenton membrane filtration system.
✓ 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）