Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Nuo Zhang,Bingzhu Wang,Pengcheng Hu,Zhenxing Gao,Haiwang Wang
MCNTs-CdS has been identified as a promising material for photocatalytic hydrogen production due to its strong visible-light responsiveness and suitable energy band structure. However, the rapid complexation of its photogenerated electrons and holes makes its photocatalytic hydrogen production unsatisfactory. To address the above problem, MCNTs-CdS/Pt/ZnFe 2 O 4 composites were designed in this paper, and Pt was used as an electronic bridge to realize the fast transfer of electrons between the two semiconductors. The results show that the carrier transport resistance of MCNTs-CdS/Pt/ZnFe 2 O 4 system is greatly reduced, and the electron-hole separation rate is significantly better than that of MCNTs-CdS. In addition, the results of the photolysis of water hydrogen production demonstrated that when the deposition amount of Pt was 8 % and the mass ratio of MCNTs-CdS to ZnFe 2 O 4 was 1:0.1, the hydrogen production rate reached its maximum (1100.82 μmol/g/h), which was 35.51 times higher than that of MCNTs-CdS. The metal Pt functions as an electronic bridge to realize rapid electron transfer and MCNTs-CdS/Pt/ZnFe 2 O 4 form a Z-scheme carrier transport mechanism.
研究领域:
材料科学
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能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2018
·
IF 0
Hongyun Yue,Ting Du,Qiuxian Wang,Zhenpu Shi,Hongyu Dong,Zhaoxia Cao,Yun Qiao,Yanhong Yin,Ruimin Xing,Shuting Yang
Metal oxides as anode materials for lithium storage suffer from poor cycling stability due to their conversion mechanisms. Here, we report an efficient biomimetic method to fabricate a conformal coating of conductive polymer on ZnFe2O4 nanoparticles, which shows outstanding electrochemical performance as anode material for lithium storage. Polydopamine (PDA) film, a bionic ionic permeable film, was successfully coated on the surfaces of ZnFe2O4 particles by the self-polymerization of dopamine in the presence of an alkaline buffer solution. The thickness of PDA coating layer was tunable by controlling the reaction time, and the obtained ZnFe2O4/PDA sample with 8 nm coating layer exhibited an outstanding electrochemical performance in terms of cycling stability and rate capability. ZnFe2O4/PDA composites delivered an initial discharge capacity of 2079 mAh g–1 at 1 A g–1 and showed a minimum capacity decay after 150 cycles. Importantly, the coating layer improved the rate capability of composites compared to that of its counterpart, the bare ZnFe2O4 particle materials. The outstanding electrochemical performance was because of the buffering and protective effects of the PDA coating layer, which could be a general protection strategy for electrode materials in lithium-ion batteries.
研究领域:
材料科学
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电化学
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仿生学
✓ 已验证
产品关联
DOI
PubMed
Nanoscience and Nanotechnology Letters
·
2017
·Vol. 9
·期 7
·989-997
·
IF 1.889
Liu Xinlin,Qin Yingying,Xing Guoliang,Li Chunxiang,Lang Jihui,Liu Yang,Xing Scott
In this paper, a novel type of core–shell structured ZnFe2O4@CdS composite photocatalyst is successfully synthesized by a facile two-step strategy method. The corresponding morphology, structure and optical properties of developed photocatalyst were well
characterized. The photocatalytic degradation of tetracycline (TC) experiments indicated that the ZnFe2O4@CdS core–shell exhibited a higher photocatalytic activity than the pure ZnFe2O4 and CdS under the visible light irradiation, especially
0.1 g ZnFe2O4@CdS composites with a content of 78 wt.% CdS resulted in 95.31% degradation of 20 mg/L TC in 90 min. with 0.1 g catalyst. Furthermore, the photodegradation mechanism was investigated by trapping experiments, which revealed that .O–2
was the most active species in the photodegradation process. And the possible process of charge transfer for ZnFe2O4@CdS composite photocatalyst was proposed based on the experimental results.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2017
·
IF 2.625
Yida Lu,Yiping Feng,Fengliang Wang,Xuegang Zou,Zhi-Feng Chen,Ping Chen,Haijin Liu,Yuehan Su,Qianxin Zhang,Guoguang Liu
In this study, a novel and highly efficient ternary photocatalytic ZnFe 2 O 4 /TiO 2 /CDs nanocomposite was successfully synthesized by a hydrothermal method. The properties and structures of the samples were characterized by X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Fourier transform infrared spectrometry (FT-IR), and photoluminescence spectrum (PL). The UV–vis diffuse reflectance spectrum was used to demonstrate that carbon quantum dots could increase the absorption of visible light wavelengths. When compared with TiO 2 /3.00 wt%CDs and ZnFe 2 O 4 /TiO 2 nanocomposites, the ternary photocatalysts exhibited the enhanced photocatalytic activity under solar-spectrum irradiation. A low CDs content of 3.00 wt% in the ternary photocatalysts possessed excellent performance in the decomposition of Rhodamine B (RhB). Act as donator and receiver, CDs can efficiently improve the ability of electron transfer and separate the electron-hole pairs. OH and O 2 − were confirmed to be involved in the photocatalytic degradation of RhB base on the Electron spin resonance (ESR) tests, and the photocatalytic mechanism of the ZnFe 2 O 4 /TiO 2 /3.00 wt%CDs was proposed. After four sequential operational cycles, the ZnFe 2 O 4 /TiO 2 /CDs maintained its photocatalytic efficiency, indicating its high photocatalytic stability. Therefore, our results provide a high efficient photocatalytic nanocomposite that synthetized by a facile method, and have implications in the removal of environmental persistent pollutants under ternary photocatalysts mediated solar degradation
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yujie Li,Haiming Zhang
It is still a huge challenge for a chemical sensor to realize low concentration acetone detection at room temperature (RT). In this work, we present an ultrafast RT acetone sensor based on the BiFeO 3 /ZnFe 2 O 4 hollow core-shell nanospheres for the first time. The BiFeO 3 /ZnFe 2 O 4 sensor exhibited the excellent response of 41.42 towards 100 ppm acetone at RT, while ZnFe 2 O 4 has almost no response in the same conditions. Further, the detection limit of BiFeO 3 /ZnFe 2 O 4 is low to 272 ppb at RT, which is below the range of applications for noninvasive diagnosis of diabetes. It worth noting that it showed ultrafast response/recovery ability (7/5 s) and good acetone selectivity at RT. Additionally, the performance of BiFeO 3 /ZnFe 2 O 4 increased by 179 % under 405 nm UV irradiation compared to that without UV light. The synergistic effects of hollow spherical structures, p-n heterojunctions and excellent photovoltaic characteristics of BiFeO 3 lead to the improved performance of BiFeO 3 /ZnFe 2 O 4 sensor. This work holds great potential for the development of RT acetone sensors in low concentrations detection.
研究领域:
材料科学
·
传感器技术
·
医学检测
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2024
·
IF 3.8
Qichao Lu,Changxiao Li,Jie Li,Qiong Tang,Lei Liu,Jinxiang Dong
Graphical ZnFe 2 O 4 spinel with various morphologies for FTS : Compared to octahedral ZnFe 2 O 4 spinel, the cubic ZnFe 2 O 4 spinel was more prone to the formation of Fe 5 C 2 phase under syngas atmosphere and exhibited higher catalytic activity and light olefins selectivity. The shape-defined ZnFe 2 O 4 spinel with cubic and octahedral morphology was hydrothermally synthesized, respectively, and used as catalyst precursor for Fischer–Tropsch synthesis (FTS). The structure of ZnFe 2 O 4 spinel was changed to ZnO and Fe 5 C 2 (Fe 5 C 2 /ZnO) after reduction and carbonization. Interestingly, ZnFe 2 O 4 with cubic morphology exhibited much higher catalytic activity and selectivity toward low-carbon olefins (C 2 –C 4 ) than the octahedral one under identical conditions, and the latter tended to produce the saturated alkanes. The primary properties of ZnFe 2 O 4 materials before and after reduction were systematically studied through a series of characteristic technologies to reveal the difference in catalytic performance between the two ZnFe 2 O 4 spinels with different morphologies.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Ruixia Shi,Yan Zhang,Xingtao Wang,Qian Ma,Aiyu Zhang,Ping Yang
Porous ZnFe 2 O 4 nanotubes and nanobelts have been fabricated through an efficient and facile approach of electrospinning followed by two-step calcination in atmosphere. The influences of electrospinning parameters such as metallic salt content, PVP content, the ratio of ethanol to water, stirring time and applied voltage on the composite fibers have been fully investigated. When the calcination temperature was increased from 600 °C to 650 °C, the ZnFe 2 O 4 nanotubes evolved into well-crystalline nanobelts due to the faster gas diffusion , more active grain growth and atomic diffusion rate caused by the relative high temperature. The plausible formation mechanism of ZnFe 2 O 4 nanotubes and nanobelts was proposed and discussed in detail. The photocatalytic activities for the photo-degradation of Rhodamine B (RhB) over ZnFe 2 O 4 nanotubes and nanobelts were evaluated under the UV-light irradiation. The degradation efficiency of nanotubes and nanobelts both can reach 99.7% after 20 min UV irradiation in presence of H 2 O 2 because of synergistic effects of Fe 3+ and H 2 O 2 , respectively, indicating the excellent Fenton-like photocatalytic properties of ZnFe 2 O 4 nanotubes and nanobelts. Additionally, the Fenton-like photocatalytic mechanism was also discussed.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chengjun Dong,Ruonan Tian,Yanlin Zhang,Kaili Liu,Gang Chen,Hongtao Guan,Zongyou Yin
Rational integration of multifunctions is an emerging strategy to develop novel chemiresistor nano platforms with superior sensing properties. Herein, a stepwise synthesis strategy is developed to assemble two MOFs with huge mismatch into MOF-on-MOF heterojunction , which was nanoarchitectured into Fe 2 O 3 @ZnFe 2 O 4 radial-heterospindles. The Fe 2 O 3 @ZnFe 2 O 4 heterospindles exhibited outstanding selective acetone detection with multifaceted superiorities, such as high response, low limit of detection, fast response and recovery time, and good linearity in responses with a wide concentration window. An in-depth discussion revealed that such multifaceted sensing characters can be attributed to the distinct radial-heterostructure which proffer synergetic effects in the unimpeded gas diffusion with mesoporous sensing nanoarchitecture, favored interfacial charge transport in radial heterojunction, abundant active adsorption/reaction sites by rich oxygen vacancies, and exponential/efficient tuning of sensor resistance with barrier height. This synthetic strategy here may offer a new opportunity for fabricating dual-to-multi MOFs-based advanced nanostructures towards practical chemiresistor nanoplatforms with favorable multifaceted superiorities.
研究领域:
材料科学
·
化学传感器
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2018
·
IF 2.891
Yang Cao,Xianyu Lei,Qianlin Chen,Chao Kang,Wenxue Li,Baojun Liu
As a broad-spectrum antibacterial agent, tetracycline hydrochloride (TCHC) was widely used in medical treatment and animal husbandry. However, the TCHC in various systems such as the soil, rivers and foods, had caused great harm to the environment and human health. Among the many methods for treated tetracycline hydrochloride in wastewater, the photocatalytic treatment had great advantages. In this study, we used Prussian blue as a precursor to synthesized porous hollow spinel cube ZnFe 2 O 4 for photocatalysis. The experimental results showed that the degradation rates of the prepared porous hollow cube ZnFe 2 O 4 (l-ZnFe 2 O 4 ) significantly better than the commercially available ZnFe 2 O 4 (g-ZnFe 2 O 4 ) and the ZnFe 2 O 4 prepared by the coprecipitation method (p-ZnFe 2 O 4 ). In addition, we made a further introduction on the degradation mechanism of TCHC. The porous hollow cube ZnFe 2 O 4 could be expected to provide a green and effective for material degradation of tetracycline hydrochloride in water.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dinh-Trinh Tran,Thi-Phuong-Thao Vu,Santi Kongmany
In this study, ZnFe 2 O 4 , BiVO 4 , and ZnFe 2 O 4 /BiVO 4 /rGO materials were synthesized using the hydrothermal method in mild conditions to study the oxytetracycline (OTC) degradation process. The results on surface morphology, functional group, structure, and optical and electrochemical characteristics revealed that ZnFe 2 O 4 /BiVO 4 /rGO were successfully prepared with high purity and good distribution of chemical elements. The impact of different parameters like pH, catalyst load, reaction time, initial OTC concentration, and the presence of ozone-nanobubbles on the OTC degradation efficiency was systematically examined to obtain optimal treatment conditions. Synergic effects between ozone-nanobubbles and ZnFe 2 O 4 /BiVO 4 /rGO heterojunction led to an enhancement of over 20 % of OTC degradation yield. The OTC degradation reached 96.3 % within 100 min at optimal conditions (pH 7.0, [Cat.] = 0.5 g/L, and [OTC] = 20 mg/L). The combination of ZnFe 2 O 4 and BiVO 4 allowed to benefit from the generation of both effective electrons and holes, which enhanced the generation rate of both superoxide and hydroxyl radicals responsible for degrading the pollutant in water while rGO sheets contributed to slowing down the recombination rate between electrons and holes and improving the photocatalytic activities of the ZnFe 2 O 4 /BiVO 4 /rGO. Liquid chromatography-mass spectrometry (LC-MS) analyses were deployed to figure out intermediate substances and possible degradation pathways of the OTC degradation process. The ZnFe 2 O 4 /BiVO 4 /rGO heterojunction exhibited a pretty good durability and stability, and was easily recovered with the aid of a magnet. The toxicity of the by-products was significantly declined compared to the OTC antibiotic.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2018
·
IF 3.609
Jun Xiao,Weiyi Yang,Shuang Gao,Caixia Sun,Qi Li
A one-pot, solvent-thermal process was used to create the ultrafine ZnFe 2 O 4 nanoparticles photocatalyst . During the solvent-thermal process, the in situ self-forming NaCl not only served as a “cage” to confine the ion diffusion, but also acted as a microreactor for nanocrystallite growth. An average particle size of ∼10 nm and a high-specific surface area of ∼112.9 m 2 /g were observed for the ultrafine ZnFe 2 O 4 nanoparticles Owing to the synergistic effect of ultrafine particle size, the full utilization of the visible light region and high conduction band (CB) position, ultrafine ZnFe 2 O 4 photocatalyst displayed an efficient photocatalytic CO 2 reduction under visible light illumination. Besides, the ultrafine ZnFe 2 O 4 photocatalyst showed high production selectivity for CH 3 CHO and C 2 H 5 OH generation in aqueous CO 2 /NaHCO 3 solution. This work may provide a new idea for the synthesis of new high-efficiency photocatalysts.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Hao Zhang,Siyuan Gao,Zeyao Feng,Zhen Sun,Xianwen Yan,Zhenhua Li,Xueli Yang,Guofeng Pan,Ye Yuan,Lanlan Guo
Room temperature H 2 S gas sensor with low detection limit is necessary for practical application. In this work, ZnFe 2 O 4 was synthesized through a simple solvothermal method, and then CuO was decorated onto the surface of ZnFe 2 O 4 via a modified metal organic framework synthesis method . After a series of characterization methods, it was found that CuO/ZnFe 2 O 4 had porous nanosphere morphology. Gas sensing measurements indicating that the synthesized CuO/ZnFe 2 O 4 porous spheres exhibited excellent H 2 S sensing performance under room temperature, including high sensitivity under low concentration (less than 10 ppm), excellent selectivity, low limit of detection (0.1 ppm), good repeatability, and fast response/recovery time. The sensing mechanism was discussed in detail, which is mainly contributed to the sensitization effect of CuO. This work provides a new strategy for constructing room temperature H 2 S gas sensor based on ZnFe 2 O 4 .
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）