ADVANCED FUNCTIONAL MATERIALS
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2022
·Vol. 32
·期 45
·2205121
·
IF 19.924
Lixuan Zhang,Kai Wang,Yanqi Jia,Liping Fang,Chen Han,Jiaquan Li,Zongping Shao,Xinyong Li,Jieshan Qiu,Shaomin Liu
Piezoelectric polarization portrays a promising technology to regulate the photogenerated charge carrier separation and transfer behaviors, and the design of multifunctional catalysts with piezo-phototronic effect is a key step. One strategy is to prepare a composite catalyst combining the ideal properties from each individual component. Herein, a facial dopant-induced self-assembling strategy is reported to fabricate an ultracompact nanocomposite (LaFeO 3 /ZnFe 2 O 4 /La 2 O 3 ) with enhanced efficiency for piezo-photocatalysis. The composite is synthesized at 800 °C from the one-pot method, thus the self-constructed interface is created during multi-phase formation, providing the intimate grain-to-grain contact between the semiconductive LaFeO 3 and piezoelectric ZnFe 2 O 4 /La 2 O 3 phases. In such a composite, a synergistic effect for oxygen activation is realized via the effective manipulation of the photogenerated charge carrier separation and spatial transportation through the vibration-created piezopotential. A high piezoelectric coefficient (d 33 ) up to 826 pm V −1 and a superior H 2 O 2 yield of 403 µmol g −1 h −1 (in open air and pure water) are achieved on the optimized composite, outperforming most of the reported lead-free piezo-photocatalyst. The ultracompact composite is very robust without any decay in H 2 O 2 -delivering capability after many cyclic tests. This study provides a universal strategy for the rational design of high-performance piezo-photocatalysts.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yiwen Zhong,Kaimin Shih,Zenghui Diao,Gang Song,Minhua Su,Li'an Hou,Diyun Chen,Lingjun Kong
Recently, a lot of attentions were paid on sulfate (SO 4 - ∙) and hydroxyl (∙OH) radicals-based advanced oxidation processes in degradation of fluoroquinolone antibiotic due to their favorable oxidation potential. This work reported an integrated peroxymonosulfate (PMS) activation process by coupling ZnFe 2 O 4 (ZFO) with energy-saving LED for degradation and defluorination of levofloxacin (LEV). The LEV degradation efficiency reached 88.52 % within 180 min in the ZFO-500/LED/PMS system, which was higher than those of other activation systems. Both SO 4 - ∙ and ∙OH were generated in the integrated ZFO-500/LED/PMS system by the photo-generated electrons and holes activation of PMS under the LED irradiation. The recombination of photo-generated electrons and holes was reduced. Plenty of ∙O 2 – and 1 O 2 were produced contributing to LEV degradation. The possible degradation pathways and mechanisms were proposed. This study presented a promising LED-assisted PMS activation process by ZnFe 2 O 4 for antibiotic degradation.
研究领域:
环境科学
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化学工程
·
水处理
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 5
·1-11
·
IF 2.02
Feng Jiantao,Wang Yechen,Hou Yanhui,Li Liangchao
Hierarchical structured ZnFe 2 O 4 @reduced graphite oxide@TiO 2 (ZnFe 2 O 4 @RGO@TiO 2 ) nanocomposite was prepared by an electrostatic layer-by-layer route, which played a synthetic effect of Fenton oxidation of ZnFe 2 O 4 and photocatalytic oxidation of TiO 2 to degrade fulvic acid (FA) solution under visible-light irradiation. In this method, RGO, as the middle layer, can effectively promote the photo-induced electron flow between the ZnFe 2 O 4 and TiO 2 and further improve the efficiency of the photo-Fenton oxidation. The influencing factors on photo-Fenton oxidation, including solution pH, catalyst, and H 2 O 2 dosage, have also been investigated. The results illustrated that the ternary composite presented the enhanced catalytic performance. Under visible light irradiation, the degradation efficiency of the sample on the FA solution can reach 95.4% within 3 h. In addition, the catalyst exhibited superior stability and reusability, and its degradation efficiency was still up to 90% after 5 cycles. Therefore, the composite will be a kind of efficient photocatalyst and had a promising application for visible-light driven destruction of organic pollutants.
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
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Dedong Zeng,Jiangli Wang,Yu Xie,Yun Ling,Jinsheng Zhao,Hao Ye,Tongcai Chen
Designing and fabricating the double-capability photocatalysts with the capability of producing hydrogen from the splitting of water and degrading environmental organic pollutants under visible light irradiation are significant in environmental treatment and new energy preparation. As a proof of concept, TiO 2 @ZnFe 2 O 4 heterojunctions with high performance and stability were prepared by a one-step hydrothermal method , in which TiO 2 nanosheets successfully grew on the main body of ZnFe 2 O 4 nanorods . The microstructures and morphologies of the as-produced composites as well as their photocatalytic hydrogen generation rate and photocatalytic degradation performances towards humic acid, florfeniol, tetracyclines, and bisphenol A were investigated. The results indicate that TiO 2 @ZnFe 2 O 4 heterojunctions possessed the higher photocatalytic activities towards hydrogen production and contaminants degradation ability than that of only TiO 2 and ZnFe 2 O 4 . Especially, TiO 2 @ZnFe 2 O 4 heterojunctions with the molar ratio of 1:4 have the best activities and manifest good stability. Significant enhancement of visible light absorption and photogenerated charge separation of TiO 2 @ZnFe 2 O 4 were achieved. This work paves a way to construct a low-cost, environment-friendly, recyclable, and non-poisonous photocatalysts for hydrogen generation and the degradation of pollutants.
研究领域:
环境科学
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材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2020
·
IF 6.444
Fei Li,Wenwei Zhan,Yaotian Su,Sajid Hussain Siyal,Gang Bai,Wei Xiao,Aosong Zhou,Gang Sui,Xiaoping Yang
The magnetic ZnFe 2 O 4 nanoparticles were synthesized and combined with carbon nanotubes (CNTs) to form a unique tangled structure (ZnFe 2 O 4 @CNT), and then used as wave absorbing functional nanofillers of polyvinylidene fluoride (PVDF) matrix. The effects of ZnFe 2 O 4 @CNT functional nanofillers on the microstructure, crystallization behavior and electromagnetic wave absorption properties of PVDF were studied. The ZnFe 2 O 4 @CNT/PVDF composite membranes containing 7 wt% nanofillers presented an optimal reflection loss of −54.5 dB with a sample thickness of 2.4 mm when the processing temperature was 60 °C. If the processing temperature of 150 °C was adopted, the composite membranes with a thickness of only 2.0 mm surprisingly achieved an effective absorption of the whole X-band. The combination of interfacial polarization, polarization relaxation loss, dipole polarization, conductivity loss, and ferromagnetic resonance loss promoted the excellent microwave energy dissipation capacity of ZnFe 2 O 4 @CNT/PVDF system.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Li Lv,Yinglin Wang,Pengfei Cheng,Bao Zhang,Fan Dang,Luping Xu
The preparation process and gas sensitivity test of three-dimensional sphere spinel ferrites with well-assembled macroporous structures have been reported in this paper. The three-dimensional ZnFe 2 O 4 macroporous spheres (3D ZnFe 2 O 4 MPs) were prepared by one-step ultrasonic spray pyrolysis (USP), in which self-assembly sulfonated polystyrene (S-PS) spheres were employed as sacrificial template. The as-prepared samples possessed interconnected macroporous with pore diameters about 200 nm can be observed in TEM characterization, which provided more reactive active sites. The catalyst Pd was doped in 3D ZnFe 2 O 4 MPs with the attempt of enhancing gas-sensing performance, which has been confirmed existed as Pd 2+ formation by XRD and XPS analysis. In a comparison with pure 3D ZnFe 2 O 4 MPs, the 0.5% PdO-dopded 3D ZnFe 2 O 4 MPs exhibited a 2 times higher response (18.9) to 100 ppm acetone at 275 °C. Furthermore, the PdO- dopded 3D ZnFe 2 O 4 MPs-based sensor also presented excellent selectivity and good long-term stability towards acetone. The outstanding sensing performance can be attributed to the 3D spheres with interconnect macroporous structure, electronic sensitization and catalytic effects of PdO. The relative sensing mechanism has been discussed in detail.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
·
IF 7.489
Mingliang Ma,Wenting Li,Zhouyu Tong,Yong Ma,Yuxin Bi,Zijian Liao,Jian Zhou,Guanglei Wu,Mingxia Li,Jiewei Yue,Xinyu Song,Xinyue Zhang
One-dimensional (1D) ZnFe 2 O 4 @SiO 2 (ZS) nanochains were prepared with Stöber method under external magnetic field. Then, 1D ZS nanochains were covered with a uniform polydopamine (PDA) shell, and the pyrolysis process was completed to obtain 1D ZnFe 2 O 4 @SiO 2 @C (ZSC) nanochains. Finally, 1D flower-like ZnFe 2 O 4 @SiO 2 @C@NiCo 2 O 4 (ZSCNC) nanochains were fabricated through a simple hydrothermal method. The carbon layer with strong dielectric loss enabled the 1D ZSC nanochains to achieve an ultra-wide effective absorption bandwidth (EAB) of 6.22 GHz. Compared with the above nanochains, the 1D ZSCNC nanochains showed more excellent microwave absorption (MA) properties because of the unique 1D flower-like architectures having large surfaces and multiple interfaces. The sample loaded with 30 wt% 1D flower-like ZSCNC nanochains showed strong MA performances with a minimum reflection loss (RL) value of −54.29 dB (11.14 GHz) and an EAB of 5.66 GHz (11.94–17.60 GHz) at the thickness of 2.39 mm. The 1D flower-like ZSCNC nanochains with strong absorption, broad absorption bandwidth (almost the entire Ku band) and thin layer has a good application prospect for the absorption of electromagnetic waves in Ku band.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Bing Bian,Xixi Zhu,Qiong Wu,Yue Liu,Shiwei Liu,Qingyun Liu,Shitao Yu
The catalytic activity of nanozymes has attracted much attention in biochemical analyses and the antibiosis and environmental fields. However, easy aggregation and difficulty in recycling greatly result in a decrease of their catalytic activity and further restrict their practical application. Herein, we immobilized Pt and ZnFe2O4 nanoparticles on poplar-wood-derived carbon (ZnFe2O4/C), which exhibited excellent peroxidase-like activity and high affinity toward H2O2 and 3,3′,5,5′-tetramethylbenzidine (TMB). Moreover, it could be easily separated by an external magnetic force from the reaction system. A sensitive and selective colorimetric sensor for glutathione (GSH) was established based on Pt/ZnFe2O4/C nanoperoxidase. The linear range for GSH was from 1 to 30 μM, and the limit of detection for GSH was calculated as 0.38 μM. The colorimetric method was applied to determine GSH in real samples for injection.
研究领域:
生物化学
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环境科学
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纳米医学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Minggang Zhao,Sisi Fan,Jingjing Liang,Ying Liu,Yingchun Li,Jing Chen,Shougang Chen
In this study, we developed a novel coelectrospinning technology to synthesize mesoporous grooved ZnFe 2 O 4 nanobelts . The nanobelts have mesoporous thin wall, grooved belt style structured transport channels and peroxidase mimetics performance. They were employed to immobilize glucose oxidase enzyme for glucose biosensor and exhibited improved performance. The widely distributed mesopores afforded scale-adaptive cells to hold enzymes molecules and maintain enzymatic activity. The grooved thin walls made enzymes have high exposure to reactants and caused high catalysis efficiency. The nanobelts themselves catalyzed the intermediate product of enzyme catalysis to enhance biosensing performance. The prepared biosensor exhibited high sensitivity (112.1 μA mM −1 cm −2 ), fast response (<2 s), low K M ( app ) (0.75 mM) and well stability. Mesoporous grooved ZnFe 2 O 4 nanobelts are promising material for enzymes assembly and biosensing applications.
研究领域:
材料科学
·
生物化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Jianan Li,Xinyong Li,Zhifan Yin,Xinyang Wang,Hangfan Ma,Lianzhou Wang
Crystal facet engineering has been proved as a versatile approach in modulating the photocatalytic activity of semiconductors. However, the facet-dependent properties and underlying mechanisms of spinel ZnFe2O4 in photocatalysis still have rarely been explored. Herein, ZnFe2O4 nanoparticles with different {001} and {111} facets exposed were successfully synthesized via a facile hydrothermal method. Facet-dependent photocatalytic degradation performance toward gaseous toluene under visible light irradiation was observed, where truncated octahedral ZnFe2O4 (ZFO(T)) nanoparticles with both {001} and {111} facets exposed exhibited a superior performance than the others. The formed surface facet junction between {010} and {100} facets was responsible for the improved activity by separating photogenerated e–/h+ pairs efficiently to reduce their recombination rate. Photogenerated electrons and holes were demonstrated to be immigrated onto {001} and {111} facets, separately. Intriguingly, electron paramagnetic resonance trapping results indicated that both •O2– and •OH were abundantly present in the ZFO(T) sample under visible light irradiation as major reactive oxygen species involved in the photocatalytic degradation process. Additionally, further investigation revealed that {001} facets played a predominant role in activating photogenerated transient species H2O2 into •OH, beneficially boosting the intrinsic photocatalytic activity. This work has not only presented a promising strategy in regulating photocatalytic performance through the synergetic effect of facet junction and specific facet activation but also broadened the application of facet engineering with multiple effects simultaneously cooperating.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2021
·
IF 4.156
Xiaocong Zhong,Zhencong Lin,Chen Chen,Ruixiang Wang,Shuiping Zhong,Zhifeng Xu
The nonferrous metal electrowinning process is energy intensive due to the sluggish dynamics of the oxygen evolution reaction (OER) on the anode. Developing novel anode materials with high OER activity and stability is imperative. Herein, we propose a novel Pb-ceramic composite anode by introducing ZnFe 2 O 4 . In this work, Pb-ZnFe 2 O 4 and PS-Pb anodes were prepared through powder pressing and sintering processes. The effects of ZnFe 2 O 4 particles on the phase composition, surface morphology and inner structure of the oxide layer formed on Pb-ZnFe 2 O 4 anodes were investigated. Furthermore, the role of ZnFe 2 O 4 in the anodic potential and stability of Pb-ZnFe 2 O 4 anodes was discussed. The results show that as the ZnFe 2 O 4 content increases, the oxide layer formed on Pb-ZnFe 2 O 4 anodes exhibits higher surficial compactness, higher integrity, and much smaller thickness. ZnFe 2 O 4 exhibits a trivial impact on the oxygen evolution dynamics. However, the anodic potential of the Pb-ZnFe 2 O 4 anode declines as the ZnFe 2 O 4 content increases, which could be attributed to the higher compactness and smaller thickness of the oxide layer. As the ZnFe 2 O 4 content increases, the weight loss of the Pb-ZnFe 2 O 4 composite anode increases, suggesting the unsatisfactory stability of Pb-ZnFe 2 O 4 , which could be attributed to the inevitable dissolution of ZnFe 2 O 4 particles, smaller thickness of the oxide layer and larger porosity of the substrate. Although Pb-ZnFe 2 O 4 composite anodes have the potential to reduce energy consumption, their unsatisfactory stability limits the feasibility of Pb-ZnFe 2 O 4 anodes in the electrowinning industry.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Wenxuan Fang,Chang Sun,Zhengying Chang,Yandi Wang,Xiangxue Wang,Shujun Yu
The highly efficient extraction of uranium from aquatic environments through adsorption method has emerged as a pivotal research focus, particularly within the domains of environmental protection and sustainable development. In this investigation, magnetically recyclable mesoporous ZnFe 2 O 4 @g-C 3 N 4 (ZFOCN) is synthesized by grafting ZnFe 2 O 4 (ZFO) nanospheres onto g-C 3 N 4 (CN) nanosheets through straightforward solution mixing followed by simple calcination, which addresses the challenge associated with the recovery of adsorbents. Characterization analyses and batch experiments reveal that the ZFOCN surface exhibits more negative zeta potential (∼−14.00 mV when pH = 5) alongside reduced contact angle with water (∼43.1° on average). Consequently, ZFOCN demonstrates superior adsorption capacity ( q max = 36.3 mg·g − 1 ), accelerated reaction kinetics (reach equilibrium within approximately 8 h) and heightened selectivity compared with CN and ZFO at pH = 5, which is better fitted by Freundlich isotherm model and pseudo-second-order kinetic model. Notably, the cycle experiment results indicate that it retains high efficiency even after five cycles (∼80 %), showing remarkable recyclability. During the adsorption process, the underlying reaction mechanisms are identified as electrostatic interaction coupled with inner-sphere surface complexation predominantly attributed to Zn–O and Fe–O bonds. Thus, this study not only introduces an effective strategy for fabricating novel magnetic adsorbent but also offers fresh insights into eliminating U(VI), contributing significantly to environmental preservation and sustainable advancement.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
化学工程
·
可持续发展
✓ 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）