iScience
·
2024
·
IF 4.6
Meng Wang,Xiaoyu Li,Yanrui Su,Jiaoge Wu,Tian Sun,Xuan Xu,Faying Fan,Yufei Zhao,Wa Gao
Fenton or Fenton-like reactions have been widely used in various fields, including solar energy conversion to generate hydroxyl radicals, environmental remediation, biology, and life science. However, the slow Fe 3+ /Fe 2+ cycle and narrow applicable pH range still present significant challenges. Here, a heterostructured CoFe-layered double hydroxide/MoS 2 nanocomposite (CoFe-LDH/MoS 2 ) was prepared via simple electrostatic interactions. The heterostructure establishes a robust interfacial contact, leading to an abundance of exposed Mo 6+ sites. Consequently, the developed CoFe-LDH/MoS 2 +H 2 O 2 system exhibited superior performance in the degradation of tetracycline (>85%) within 60 min across a wide pH range from acidic to basic. Moreover, the CoFe-LDH/MoS 2 heterojunction catalysts exhibited exceptional resistance to common anions and efficiently degraded various organic pollutants. The mechanism study verified that the CoFe-LDH/MoS 2 had high efficiency in producing 1 O 2 and ‧OH to degrade various organic pollutants. The present study will serve as a foundation for creating efficient catalyst systems for related environmental remediation.
研究领域:
环境科学
·
催化材料
·
污染治理
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jiawei Du,Mengyi Zhang,Peng Tang,Liwen Zhang,Xueying Zhao,Xiaolu Zhan,Bo Wang,Jianjun Zhao,Nana Liu,Guohua Wu,Xuyang Zhang
The development of low-frequency absorption materials is pivotal for the significant reduction of electromagnetic interference and the enhancement of the electromagnetic environmental quality. Further research is essential to deepen and expand the scope of low-frequency absorption studies. In this study, nanoscale CoFe/C composite materials were synthesized from cobalt-iron bimetallic metal-organic frameworks (MOFs) via a hydrothermal synthesis process, followed by heat treatment. The dispersion of CoFe alloy particles and the morphology of the composites were effectively controlled by modulating the cobalt-to-iron element ratio in the precursors, thereby optimizing the absorption capabilities in a mid-low frequency range. The prepared Co 3 Fe 7 /C composite achieved a notable minimum reflection loss (RL min ) of −55.05 dB in the C-band at a thickness of 3.46 mm, with an effective absorption bandwidth (EAB) of 2.2 GHz (5.40–7.60 GHz), covering 55 % of the C-band. Furthermore, at a thickness of 1.67 mm, the EAB was extended to 5.12 GHz. The nanoscale core-shell structured CoFe alloy/carbon composites demonstrate considerable potential as exceptional low-frequency absorption materials, due to their favorable dispersion, high magnetic responsiveness, and the presence of numerous heterogeneous interfaces.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Jianwei Li,Yuanqing Ding,Qiang Gao,Hongming Zhang,Xinhai He,Zhonglei Ma,Bin Wang,Guangcheng Zhang
Developing ultrathin, lightweight, flexible and efficient electromagnetic interference (EMI) shielding materials is still a long-standing issue. Herein, a series of biomass derived carbon composite films with superior EMI shielding performance are reported. The cotton derived carbon fabric wrapped with CoFe alloy nanoparticles (CCF@CoFe) was prepared by pyrolysis at temperature of 600–800 °C and subsequently encapsulated by polyimide (PI) resin to obtain the CCF@CoFe/PI films. The prepared composite films present favorable flexibility, remarkable tensile strength of ~10 MPa and exceptional EMI shielding efficiency of ~32 dB over the X-band with the thickness of 0.16 mm. In addition, the EMI shielding performance of the composite films can be adjusted by changing the CoFe loading content and pyrolysis temperature, and an EMI shielding efficiency of ~62 dB is achieved by stacking 6 layers of nanocomposite films, shielding 99.999937% of incident electromagnetic waves with thickness of only 0.98 mm. In view of excellent comprehensive properties, this ultrathin and low-cost biomass derived films are highly promising materials for EMI shielding in practical applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Hanyu Xu,Jianjun Pu,Xu Zou,Qian Li,Jiawen Zhou,Hongchuan Ye,Ning Li,Rong Peng,Xingyan Liu,Youzhou He,Jinhang Dai,Siping Wei
The advancement of alkaline water electrolysis relies on creating efficient, durable, and affordable electrocatalysts for the oxygen evolution reaction (OER). Here, we reported a heterostructured CoFe/a-NiFe LDH catalyst that integrates amorphous NiFe layered double hydroxide (LDH) with crystalline CoFe LDH through interface engineering. The CoFe/a-NiFe LDH catalyst achieved superior activity with an overpotential of 265 mV at 100 mA·cm −2 , which outperformed the commercial RuO 2 . It also demonstrated rapid kinetics with a Tafel slope of 38.8 mV·dec −1 . The synergistic coupling between the crystalline domains and amorphous regions minimized charge transfer resistance while maximizing electrochemically accessible sites. Remarkably, the catalyst showed outstanding durability, operating consistently for 220 h at demanding current densities of 100 mA·cm −2 . This work established amorphous-crystalline interface engineering as a powerful strategy for designing high-performance water oxidation electrocatalysts.
研究领域:
材料科学
·
电化学
·
能量转换
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Shixiang Xue,Tong Zhou,Pan Wu,Liang Zhao,Yanli Nan,Mingtao Qiao,Wanying Lei
Exploring high-efficient, earth-abundant and stable electrocatalyst for oxygen evolution reaction (OER) is of vital importance for large-scale implementation of energy converting and storing. Thus, we fabricated a free-standing hierarchical heterostructure electrode of Ni 0.85 Se@CoFe LDH/NF via a rational combination of hydrothermal, selenization and electrodeposition process, among which the ultrathin CoFe LDH nanosheets intimately assembled onto the vertical aligned Ni 0.85 Se nanosheets supported on Ni foam. The constructed core-shell nanosheet arrays hold the plentiful hetero-interfaces and intimate interactions through metal-oxygen bonds between two individuals, which guarantee the fast OER kinetic processes. Additionally, CoFe LDH with crystalline/amorphous hybrid structure favors providing more reaction sites. Remarkably, the optimal Ni 0.85 Se@CoFe LDH/NF binary composites possess outstanding OER activity with a low overpotential of ∼223 and 280 mV at 10 mA cm −2 and 100 mA cm −2 in alkaline solution as well as good durability. This research offers an alternative approach for improving electrocatalytic water splitting through constructing 3D hierarchical heterostructures.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Dahu Ding,Shengjiong Yang,Liwei Chen,Tianming Cai
Developing carbon-based hybrid catalysts with high reactivity, good stability, and low cost is critical for environmental remediation via heterogeneous advanced oxidation processes (AOPs). In this work, CoFe alloy particles encapsulated in nitrogen doped graphitic carbon (donated as CoFe@N-GC), in situ converted from cobalt modified Prussian blue (PB) precursor through a two-step carbonization route, is rationally designed and synthesized as an advanced catalyst for the degradation of antibiotics norfloxacin (NOF) by coupling with peroxymonosulfate (PMS). The resultant hybrid catalyst can not only offer a conductive network that promotes the electron transfer but also protect the metal species from being leached out. By serving as a catalyst/activator, it shows an outperforming performance in catalytic degradation of organic pollutants than other catalysts (i.e. CuO, CoFe 2 O 4 , and biochar). The electron paramagnetic resonance (EPR) results clearly reveal that the sulfate radicals (SO 4 •− ) and singlet oxygen ( 1 O 2 ) are the dominant reactive oxidative species (ROS). After four successive cycles, CoFe@N-GC still performs excellent catalytic activity, leading to a NOF degradation of 94.4% within 20 min ([NOF] = 15 µM, [PMS] = 0.2 mM, [Catalyst] = 0.05 g L −1 , pH = 6.0). This study highlights the in situ synthesis of CoFe@N-GC with outstanding activities for catalytic degradation of organic pollutants.
研究领域:
环境科学
·
材料科学
·
化学工程
·
催化
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Jiahui Li,Yufen Wang,Qinyuan Yu,Xuedong Wei
A kind of MoS2@CoFe-MOF electrocatalyst was prepared on carbon cloth by a one-pot hydrothermal method. Excellent electrocatalytic activity of MoS2@CoFe-MOF is demonstrated, and the catalyst has overpotentials of 220 mV and 405 mV at 10 mA cm−2 and 50 mA cm−2, respectively. It is found that the MoS2@CoFe-MOF electrode exhibits excellent stability at the end of operation for 48 000 s, and it has the highest electrochemically active specific surface area and the lowest charge transfer resistance. This work proposes a promising approach in energy chemistry for hydrogen production by electrolysis of water using electrocatalysts composed of non precious transition metal sulfides and bimetallic MOFs.
研究领域:
材料科学
·
电化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiong Wu,Ran Liu,Fenglin Miao,Guangqing Zhang,Wengang Li,Yujun Song
Among all the nanomaterials, ultra-small nanohybrids have gained considerable attention as drugs, contrast agents, molecular nanoprobes, and catalysts owing to their multi-functionality and size effect. However, their extension and commercialization are restricted due to low synthetic efficiency and uncontrollable structure. Herein, a pilot microfluidic system (PMS) was built to successfully synthesize the ultra-small (2.3 ± 0.7 nm) CoFe-WO x nanohybrids (NHs) with a tiny CoFe core and a mixed metal oxides shell (CoWO 4 -Fe 2 WO 6 -WO 3 ). Furthermore, the CoFe-WO x NHs displayed excellent multi-modal imaging properties, which could be observed optically via a dark-field microscope, imaged through X-ray computed tomography and magnetic resonance imaging device. For the first time, hybridization between metal cores and metal-oxide shells produced two strong absorption peaks in the long band of near infrared radiation, one at 1450 nm and the other at 1980 nm. Overall, CoFe-WO x NHs emonstrated distinct magnetic and optical properties and multimode imaging capabilities due to their microstructure and composition. These findings may prove to be effective in finding alternatives for nanoprobes that can be used for visible/infrared/MRI/CT imaging, as well as pre-drugs for photothermal/photodynamic and magnetothermal/magneto-dynamic therapies.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Jiang Zhuwu,Tu Zhehan,Xu Dongdong,Chen Jinfeng,Yang Jiahan,Zhang Fengying,Lin Weixin,Bai Xue,Zhang Hongyu
In the process of sterilization and disinfection, chemical reagents will react with natural organic matter and inorganic matter in water, and inevitably generate disinfection byproducts. These harmful substances are carcinogenic, teratogenic and mutagenic, and their content is low and difficult to detect. Therefore, in this study, we prepare Fe/CoFe-LDH electrodes by in-situ co-precipitation method, and their special structures and morphologies are used to achieve efficient removal of disinfection byproducts. On this basis, the prediction model of trichloroacetamide removal rate is constructed by using the backpropagation neural network, and the prediction model is used to predict the trichloroacetamide removal rate under different experimental parameters and the experiment is verified. The optimal process conditions are obtained, and the maximum trichloroacetamide removal rate is up to 81.62%. The feasibility of the data analysis and processing method based on machine learning in the prediction of disinfection by-products in drinking water is effectively proved.
研究领域:
环境科学
·
电化学
·
机器学习
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2022
·
IF 3.407
Yichi Zhang,Chengqiang Gan,Qianqian Jiang,Peng Lang,Wei Wang,Jianguo Tang
The preparation of high-efficiency, stable and low-cost electrocatalysts for Oxygen Evolution Reaction (OER) is essential for generating clean hydrogen energy. Most of the reported electrocatalysts have complex preparation methods with low yields, and some even add precious metals. Here, a simple one-step co-precipitation method is presented to synthesize CoFe-LDH (layered double hydroxide) nanosheets with a layered defect structure. The specific structure synthesized by a facile method can promote the diffusion of proton acceptors in interlayer basal plan. Meanwhile, Co 3 Fe 1 -LDH shows remarkable electrocatalytic activity, the corresponding overpotential at 10 mA·cm −2 is 314 mV, and the Tafel slope is only 79.4 mV·dec -1 , which owns superior performance than that of most reported LDH electrocatalytic for OER. In addition, our research illustrates that simple CoFe-LDH also can show excellent electrocatalytic performance by adjusting the charge density of the main layer.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Jian Tang,Junxian Hu,Xuanli Chen,Bin Yang,Keyu Zhang,Yin Li,Yaochun Yao,Shaoze Zhang
The development of economically feasible and efficient bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in electrochemical water splitting for hydrogen generation is highly significant. Here, the OER and HER activities on CoFe LDH are enhanced by coupling CeCO 3 OH to construct heterostructures and doping Ce atoms. The results reveal strong electronic interactions at the heterointerface, leading to the generation of abundant oxygen vacancies (OVs). Ce doping induces lattice distortion in CoFe LDH leading to a large number of defects and simultaneously leading to changes in the morphology of the layer. Benefiting from their synergistic effects, the prepared CeCO 3 OH/Ce-CoFe LDH heterostructure exhibits excellent OER and HER performance with low overpotentials of 216 mV and 165 mV at 10 mA cm −2 respectively in alkaline media. Moreover, it demonstrates robust stability (OER: 94 h at 100 mA cm −2 ) in 1.0 M KOH electrolyte. When employed as both the anode and cathode catalyst, it demonstrates good stability for 77 h. This work provides a new perspective on the design of LDH-based bifunctional catalysts for overall water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiangshan Li,Yuxiao Chu,Chuanqun Zhang,Xiao Zhang,Chenqi Wu,Xianqiang Xiong,Lujia Zhou,Chenglin Wu,Deman Han
The development of efficient photocathodic protection system requires highly active and robust light-absorbing electrodes for promoting the electron transfer from the light-absorber to the protected metal. Herein, we present an extremely active and stable CoFe prussian blue (CoFe-PB) modified BiVO 4 film prepared by sequentially dipping the BiVO 4 film in K 3 [Fe(CN) 6 ] and CoCl 2 solution, which can realize the long-term protection of 304 stainless steel under simulated solar illumination. Particularly, the photocathodic protection process can be operated in a scavenger-free environment. Our mechanism studies reveal that the CoFe-PB overlayer acts as the hole storage layer which can effective extract the photo-generated holes from the BiVO 4 photoanode, and meanwhile works as an efficient catalyst that overcome the slow water oxidation barrier at the electrode/liquid interface, and thus greatly increase the electron lifetime, thereby enhancing the photocathodic protection capability. Our work provides a rather simple and effective design strategy for constructing semiconductor/electrocatalysts system for the underlying photogenerated cathodic protection application.
研究领域:
材料科学
·
电化学
·
光催化
✓ 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）