ACS Sustainable Chemistry & Engineering
·
2015
·
IF 4.642
Jun Liu,Shuanglei Yang,Wei Wu,Qingyong Tian,Shuyuan Cui,Zhigao Dai,Feng Ren,Xiangheng Xiao,Changzhong Jiang
The 3D flowerlike α-Fe2O3@TiO2 core–shell nanocrystals with thorhombic, cubic, and discal morphologies are synthesized for photocatalytic application. α-Fe2O3 nanocrystals were prepared via a Cu2+, Zn2+, and Al3+ ion-mediated hydrothermal route. The α-Fe2O3@TiO2 core–shell nanocrystals are obtained via a hydrothermal and annealing process. The shape-dependent photocatalytic activities of these as-obtained α-Fe2O3@TiO2 core–shell nanocrystals are measured. The results reveal that the discal α-Fe2O3@TiO2 nanocrystals exhibit the best photocatalytic activity relative to the other two core–shell nanocrystals because the discal α-Fe2O3 nanocrystals possess more rough surface and surface defects. The fast interfacial charge-transfer process and the wide spectral response could be the driving force for the enhanced photocatalytic performance. These core–shell architectures provide a positive example for synthesis of novel composite nanomaterial.
研究领域:
材料科学
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纳米技术
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光催化
·
化学
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DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 18
·4546
·
IF 3.1
Li Liu,Zhenghao Cui,Bo Feng,Mengjing Sui,Huaqin Huang,Zhaoyang Wu
In this study, novel Fe2O3/TiO2photocatalytic composites were synthesised by combining traditional oxidation roasting with the sol-gel method, using low-cost metallurgical waste (iron scales) as the raw material. The characterisation results revealed that the oxidised iron scales could be transformed into high-purity and porous Fe2O3particles through oxidation roasting, thereby providing additional sites for the adsorption process and thus serving as an effective carrier for TiO2-based photocatalytic materials. During the sol-gel process, TiO2was loaded onto the synthesised Fe2O3particles, generating core-shell heterostructure Fe2O3/TiO2photocatalytic composites. Under visible light irradiation for 90 min, the Fe2O3/TiO2photocatalytic composites achieved a remarkable methylene blue removal rate (97.71%). This reaction process followed the quasi-first-order kinetic model with a rate constant of 0.038 min−1. The results have demonstrated that this combination of various components in the Fe2O3/TiO2photocatalytic composites improved the adsorption, light utilisation, and charge separation effect of the photocatalysts. Moreover, the material exhibited favourable stability and recyclability, making it a decent candidate for the treatment of wastewater from the biochemical industry. Therefore, this study provides a new strategy for improving the photocatalytic activity of TiO2and expanding the high value-added utilisation of iron scales.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ChemElectroChem
·
2020
·Vol. 7
·期 24
·4963-4970
·
IF 4.154
Dongyang Qu,Zhonghui Sun,Shiyu Gan,Lifang Gao,Zhongqian Song,Huijun Kong,Jianan Xu,Xiandui Dong,Li Niu
Graphical The 2D structured Fe 2 O 3 /TiO 2 composite nanoplates offers open channels for favorable ion and electron transports. The combination of TiO 2 with a steady structure further provides sufficient volume fluctuation space for Fe 2 O 3 . Fe 2 O 3 /TiO 2 nanoplates as an anode material thus exhibit favorable rate and cycle performances for lithium-ion batteries compared with Fe 2 O 3 . After assembled with LiFePO 4 cathode, the full cell also demonstrates stable cycle capacity (132 mAh g −1 at 0.1 A g −1 after 150 cycles). The rapid capacity decay is one of the challenges for the anodes of metal oxides-based lithium-ion batteries (LIBs). Herein, we report a characteristic nanoplate-structured metal oxide anode consisting of hexagonal Fe 2 O 3 and TiO 2 (denoted as Fe 2 O 3 /TiO 2 ) via a facile hydrothermal strategy. Owing to two-dimensional (2D) structured and stable TiO 2 modifier, Fe 2 O 3 /TiO 2 composite demonstrates significantly improved electrochemical LIBs performances. The Fe 2 O 3 /TiO 2 composite material buffers the volume expansion of Fe 2 O 3 and improves the rate capability and cycling performances. Upon 1000 long-term cycles, the anode electrode delivers high discharge capacity of 1056 mAh g −1 at 0.5 A g −1 . The full cell that is composed of Fe 2 O 3 /TiO 2 as the anode and commercial LiFePO 4 as the cathode delivers superior rate capacity (84 mAh g −1 at 2 A g −1 ) and stable cycle capacity (132 mAh g −1 at 0.1 A g −1 after 150 cycles). This 2D composite nanostructure offers an approach to improve the metal oxide-based anodes of LIBs.
研究领域:
材料科学
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电化学
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纳米技术
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能源存储
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DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Linsong Wu,Haoran Shi,Xingzhi Wang,Shiwei Lu,Xiang Chen
In this study, a series of nano-TiO2 composite materials, including nano-TiO2, nano-SnO2/TiO2, nano-SiO2/TiO2, and nano-Fe2O3/TiO2, were successfully synthesized via the gaseous detonation method. Comprehensive characterization of the synthesized samples was carried out through X-ray diffraction (XRD), transmission electron microscopy/high-resolution TEM (TEM/HRTEM), scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), Brunauer–Emmett–Teller (BET) method, and Fourier transform infrared (FTIR) analysis, which unveiled the significant influence of precursor types on the microstructure of the composite materials. Specifically, the incorporation of Sn4+ promoted the transformation of TiO2 to the rutile phase, reducing particle sizes from 25 to 19 nm and increasing the specific surface area from 44 to 86 m2/g. In contrast, the introduction of SiO2 impeded the rutile phase formation, leading to a marked reduction in particle size to 14 nm and an enhancement of the specific surface area to 104 m2/g. Furthermore, the presence of Fe3+ promoted the formation of the rutile phase and enabled particle growth to 44 nm. These findings not only deepen the understanding of structural control in the synthesis of nano-TiO2 composite materials via the gaseous detonation method but also highlight the critical role of precursor selection in determining the properties of the resulting materials.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2017
·Vol. 17
·期 5
·3010-3015
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IF 1.483
Li Rong,Liu Jia,Jia Yuefa,Zhen Qiang
Photocatalytic degradation performance of oxytetracycline (OTC) was investigated in aqueous solution using Fe2O3–TiO2 nanopowders under UV and visible light, respectively. Compare with pure TiO2, the Fe2O3–TiO2
nanopowder had improved photocatalytic activity under visible light, while had a bit decrease under UV light. Photoluminescence (PL) spectrum measurement, ·OH radical test and trapping experiments were carried out to investigate the photocatalytic mechanism. Under UV light, photogenerated
electrons–holes can transfer from TiO2 to the conduction band and valence band of Fe2O3, respectively, and further participated in the degradation of OTC, thus both O2·− and holes are the main active species in this case. Under
visible light, Fe2O3 was activated and yield charge carriers, then the photogenerated electrons immigrated to the trapping site of TiO2, the photogenerated holes accumulate in the valence band (VB) of Fe2O3 was the major active species
reacted with OTC.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 10
·9087-9096
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IF 2.195
Liu Minmin,Yu Shuili,Hou Li-an,Hu Xiaojun
A series of Fe 2 O 3 and TiO 2 immobilized on NZVI modified zeolite composites ((n)Fe 2 O 3 –TiO 2 /FeZ) were synthesized by a one-pot hydrothermal method combined with calcination for oxytetracycline (OTC) removal. Some of the zero valent iron particles (NZVI) were impregnated into the framework of zeolite X by hydrothermal method and others were oxidized to Fe 2 O 3 through calcination. The TiO 2 and Fe 2 O 3 particles were immobilized on the surface of zeolite X. Compared with pure Fe 2 O 3 –TiO 2 , the OTC adsorption and photocatalytic degradation efficiency of (n)Fe 2 O 3 –TiO 2 /FeZ increased sharply. As the weight ratio of NZVI to TiO 2 was six and four, the sample had the highest adsorption efficiency (95%) and showed the highest total efficiency (98%) via adsorption and visible light—driven photocatalytic activity for the degradation of OTC, respectively. The materials also had good cyclic stability and the removal efficiency reached up to above 80% after four runs. In addition, the photocatalytic mechanism was proposed. The improved photocatalytic activities and stabilities of (n)Fe 2 O 3 –TiO 2 /FeZ for OTC degradation were ascribed to the enhanced adsorption capacity of FeZ, the strong absorbance in the visible light region and improved photo-induced charge carriers separation.
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
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Xi-Ming Song,Xin Zhou,Chunxue Yuan,Yu Zhang,Qiang Tong,Ying Li,Luxia Cui,Daliang Liu,Wei Zhang
We reported a novel Fe 2 O 3 /rutile TiO 2 nanorod (NR) arrays with the heterogeneous structure for photoelectrochemical (PEC) cells, which were fabricated on fluorine-doped tin oxide glass (FTO) substrates that serve as model architecture via a hydrothermal method. Fe 2 O 3 was revealed as an inexpensive and eco-friendly semiconductor sensitizer to make TiO 2 respond to visible light . By using this photoanode, the photoelectric conversion and water splitting properties of PEC cells based on the one-dimensional (1D) Fe 2 O 3 /TiO 2 heterostructures were investigated in detail under simulated sunlight. Meanwhile, the optimization of photovoltaic performance was also achieved by regulating the amount of Fe 2 O 3 . The open circuit voltage and short circuit current of the Fe 2 O 3 /TiO 2 solar cell can reach 0.435 V and 1.840 mA/cm 2 , respectively. In addition, theoretical analysis of the photoelectric effect is preliminarily explored on the basis of the flat band potential results.
研究领域:
材料科学
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物理化学
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能源科学
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纳米科技
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光催化
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2026
·
IF 4
Yunxiao Ban,Yufei Zhao,Yuzhen Wu,Haoran Chen,Yaping Jiang
Photocatalytic treatment of wastewater is often limited by insufficient light penetration caused by pollutants and inefficient catalyst recovery. To address these challenges, a novel dual-channel photocatalytic reactor (DCPR) based on an α-Fe₂O₃/TiO₂ film was developed. In this system, light propagates through an independent transparent channel, while pollutants and oxygen flow through a separated reaction channel, enabling enhanced light utilization and improved interaction between reactants and photocatalytic interfaces. The results demonstrate that the dual-channel configuration significantly enhances photocatalytic performance. The degradation rate of methylene blue was 3.65 times higher than that of a conventional single-channel reactor. Under optimized conditions, the phenol degradation efficiency reached 93.05% after 12 h of visible-light irradiation, accompanied by a total organic carbon (TOC) removal efficiency of 71.3%. The α-Fe₂O₃/TiO₂ catalyst film exhibited excellent reusability, maintaining approximately 90% of its degradation efficiency after ten consecutive cycles. Furthermore, the practical applicability of the DCPR system was evaluated using a synthetic industrial wastewater matrix containing phenol, humic acid, and inorganic salts. The reactor maintained continuous degradation capability under this complex wastewater condition, demonstrating its potential for practical wastewater treatment applications. Mechanistic investigations revealed that superoxide radicals (·O₂⁻) and photogenerated holes (h⁺) were the dominant reactive species involved in the degradation process, while hydroxyl radicals (·OH) played a secondary role. The enhanced photocatalytic performance was attributed to the separation of light and pollutant transport pathways, which effectively reduced light attenuation and promoted mass transfer. This study provides an effective reactor design strategy for improving photocatalytic efficiency and offers a promising approach for the treatment of complex wastewater matrices.
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DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 7
·1345
·
IF 4.324
Qingqing Tao,Xin Huang,Jingtao Bi,Rongli Wei,Chuang Xie,Yongzhu Zhou,Lu Yu,Hongxun Hao,Jingkang Wang
In this work, Fe2O3@TiO2nanostructures with staggered band alignment were newly designed by an aerobic oil-phase cyclic magnetic adsorption method. XRD and TEM analyses were performed to verify the uniform deposition of Fe2O3nanoparticles on the nanotube inner walls of TiO2. The steady-state degradation experiments exhibited that 1FeTi possessed the most superior performance, which might be ascribable to the satisfying dark adsorption capacity, efficient photocatalytic activity, ease of magnetic separation, and economic efficiency. These results indicated that the deposition of Fe2O3into TiO2nanotubes significantly enhanced the activity of Fe2O3, which was mainly ascribed to the Fe2O3-induced formation of staggered iron oxides@TiO2band alignment and thus efficient separation of h+and e−. Furthermore, the PL intensity and lifetime of the decay curve were considered as key criterions for the activity’s evaluation. Finally, the leaching tests and regeneration experiments were also performed, which illustrated the inhibited photodissolution compared with TiO2/Fe3O4and stable cycling ability, enabling 1FeTi to be a promising magnetic material for photocatalytic water remediation.Keywords:1D nanostructures;TiO2nanotubes;iron oxides;visible-light photocatalysis
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Qiong Sun,Peng Hou,Songhao Wu,Liyan Yu,Lifeng Dong
A Z-scheme mechanism associated with localized surface plasmon resonance (LSPR) effect is proposed and proved in a ternary Ag-Fe 2 O 3 -TiO 2 composite for photocatalytic reactions. The Ag, Fe 2 O 3 and TiO 2 nanoparticles are prepared to exist in a closely connected Ag-Fe 2 O 3 -TiO 2 heterostructure . Compared to TiO 2 , the addition of Ag-Fe 2 O 3 causes a broad absorption in visible region by LSPR effect of Ag to facilitate electron transfer from TiO 2 to Ag. In addition, electron migration from TiO 2 to Fe 2 O 3 can also be detected, indicating the interface between TiO 2 and Fe 2 O 3 can offer a route with low resistance for charge separation and directional transfer. As a result, photocatalytic activities are greatly improved in Ag-Fe 2 O 3 -TiO 2 , with the highest calculated apparent kinetic constant located at 0.027 min −1 , which is 7.3, 1.9, 1.7 and 1.5 times of Ag-Fe 2 O 3 , TiO 2 , Ag-TiO 2 and Fe 2 O 3 -TiO 2 , respectively. Free radical quenching experiments show that O 2 -∙ and positively charged holes are main oxidative species responsible for the degradation of dyes. Specifically, OH∙ radicals can be hardly found in pure TiO 2 under irradiation but can be extensively produced and participate in the degradation after the addition of Ag-Fe 2 O 3 , which further proves that a Z-scheme route dominates the electron transfer between TiO 2 and Fe 2 O 3 .
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2024
·Vol. 89
·期 5
·2879-2894
·
IF 3.2
Mahsa Kheirandish,Majid Javanmard dakheli,Maryam Mizani,Alireza Salehirad
The aim of this study was the synthesis of bimetallic nanoparticles based on Fe 2 O 3 /TiO 2 and its use in the poly(lactic acid) (PLA) films as an oxygen scavenger in extra virgin olive oil (EVOO) packaging. Bimetallic nanocomposites were prepared by two different precipitation methods (precipitation with ammonia and sodium hydroxide). The characteristics of bimetallic nanoparticles precipitated with sodium hydroxide (Na-Ti 0.01 Fe 0.048 O 0.08 ) and bimetallic nanoparticles precipitated with ammonia (NH-Ti 0.01 Fe 0.022 O 0.09 ) were compared. Relative amounts of elements in bimetallic nanocomposites and their morphological characteristics were determined using field emission scanning electron microscopy coupled with energy-dispersive X-ray spectrometer. Porosity volume and surface area of bimetallic nanoparticles were calculated using adsorption–desorption isotherms and the Brunauer–Emmett–Teller method. The formation/characterization of bimetallic nanoparticles and their location in the matrix of PLA-based nanocomposite film was studied using X-ray diffraction and Fourier transform infrared. In nanocomposite films based on PLA, bimetallic nanoparticles lead to better oxidative stability (peroxide value, p -anisidine index, K 232 , and K 270 ) of the EVOO and oxygen scavenging during storage compared to free nanoparticles. Mechanical properties of nanocomposite films were improved due to bimetallic nanoparticles, which were better for Na-Ti 0.01 Fe 0.048 O 0.08 . In vitro release modeling of the bimetallic nanoparticles in EVOO proved that Fickian diffusion is the dominant mechanism, and the Peleg model was the best description of the release behavior of nanoparticles.
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Tao Xiang,Fang Li,Mingyao Yuan,Zhenxing Zeng,Hong Peng,Hong Xiao,Xiaohui Lu,Yanzong Zhang,Shihuai Deng,Guangshan Zhang,Peng Xu,Tianyao Shen,Xueming Dang,Xiaojing Wang
Ineffective utilization of generated oxidants, such as H 2 O 2 , together with the nonselectivity of •OH, the principal active species, has significantly hindered the growth of discharge plasma in application for wastewater treatment. Herein, the introduction of constructed Fe 2 O 3 /TiO 2 heterojunction to dielectric barrier discharge plasma (DBDP) not only increased oxidant utilization, but also triggered a shift of decisive position of active species from •OH to selective 1 O 2 and O 2 • - towards bisphenol A (BPA) degradation. Experiments and theoretical calculations collectively revealed that the above process was realized under the joint drive of high-energy electrons, photons, and an interfacial electric field in Fe 2 O 3 /TiO 2 heterojunction. Among them, the interfacial electric field facilitated the separation of electron-hole ( e - - h + ) pairs and the transfer of charge to the antibonding orbit for O-O in H 2 O 2 , dissolved O 2 and O 3 absorbed on the metal sites. Such a work offered theoretical guidance for the ongoing growth of discharge plasma at both the macro and micro levels.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）