ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lei Zhou,Xiayuan Yang,Xin Zhang,Mingzhe Li,Kepi Chen,Yuzhen Lv,Jin Zhang,Wei Zhou
It is of great significance to develop energy-saving and scalable synthetic methods for high-performance electrodes in green hydrogen production. Here we report a green room-temperature synthesis to produce integrated electrode with Cr-doped NiFe LDH/FeOOH nanosheets grown on iron foam. This simple one-step corrosion strategy can fabricate the electrode with an area up to 600 cm 2 . Through in situ self-activation process, the obtained Cr v -NiFeOOH/FeOOH@IF electrode exhibits excellent OER activity and durability, offering ultralow overpotentials of 279.3 and 308.4 mV to drive high current densities of 500 and 1000 mA cm −2 and operating steadily at industrial-level current density of 1000 mA cm −2 over 200 hrs with a high potential retention of 98.2 %. In situ electrochemical tests and theoretical calculations reveal the synergistic kinetics modulation. Both Cr vacancies and NiFeOOH/FeOOH heterostructure can accelerate water oxidation process by optimizing the adsorption energy of the intermediates. DFT calculations confirm Cr vacancies can further reduce the rate-determining step (RDS) energy barrier of the heterostructure. This work offers an economical and scalable corrosion strategy to produce high-efficient OER electrocatalysts toward industrial water splitting.
研究领域:
材料科学
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电化学
·
能量转换
·
纳米技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Zichen Wang,Hongbin Li,Wei Ma,Yinglong Wang,Peizhe Cui,Jianguang Qi,Zhengrun Chen,Zhaoyou Zhu,Fanqing Meng
Peroxymonosulfate (PMS) activation have provided a new direction to eliminate the organic pollutant . Current challenges that must be solved include secondary pollution by the metal ions and limitation in the recyclability of the catalysts. The waste 1D-FeOOH adsorbent with adsorption of metal elements (As, Cr or Mo ions) has been reused as an efficient electro-catalyst for PMS activation and used to metronidazole (MTD) degradation for the first time. The effects of current density, initial reaction pH, stirring rate, PMS dosage and solution temperature on MTD degradation was studied. The used 1D-FeOOH with adsorption of Mo ions showed the highest PMS activation ability and 99.6% MTD could be removed after 30 min degradation. The •OH and Found that SO 4 •− is the main free radical for MTD degradation. DFT calculation and characterization results were demonstrated that the high PMS electro-catalysis activation ability of the 1D-FeOOH@Mo has resulted from the special composition-dependent interactions among FeOOH@Mo and PMS, including stable adsorption properties, easy electron transfer and weak O O bond. The possible PMS electro-catalysis activation mechanism and MTD degradation pathway have been proposed. (ECOSAR) was used to evaluate the toxicity of metronidazole during degradation. The results showed that the toxicity of MTD and its intermediates could be effectively reduced by prolonging the degradation time in 1D-FeOOH@Mo solution. This work provides new insights for waste adsorbent disposal and gives a new perspective for PMS activation to degradation of antibiotics in water.
研究领域:
环境科学
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催化化学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 30
·23607-23622
·
IF 2.779
Tong Lin,Wu Chunxia,Hou Junxian,Yan Jiayuan,Zhang Xiaoliang,Mu Jingbo,Wang Zehu,Wang Yanming,Che Hongwei,Zhang Zhixiao
Nano core–shell structured materials have different or better properties than single components, which can realize the design and optimization of nanoscale particle structure and properties. Additionally, hollow core–shell materials have the advantages of large specific surface area, abundant active sites, low density, short mass transfer path, and wide cavity structure, which are widely used in the fields of electrochemistry, biomedicine, and environmental protection. Herein, hollow core–shell FeOOH@MnO 2 nanorod composites were prepared by easiest hydrothermal method. Due to the synergy and versatility between the hollow FeOOH nanorods core and the MnO 2 nanosheets shell, the FeOOH@MnO 2 composite exhibits outstanding electrochemical characteristic as an electrode material with specific capacitance of 924 F g −1 at 1 A g −1 , admirable rate capability (capacitance retention of 75.9% from 1 to 10 A g −1 ), and remarkable cycling stability (91.2% of initial capacity retained after 5000 charge/discharge cycles). Notably, the assembled FeOOH@MnO 2 //activated carbon (AC) asymmetric supercapacitor facility possessed an energy density of 53.4 Wh kg −1 and a power density of 722 W kg −1 , indicating that the hollow core–shell FeOOH@MnO 2 nanorod nanocomposite is a viable electrode material that can be used in supercapacitors.
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
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 17
·3801-3810
·
IF 3.286
Huang Yuanlin,Liang Guangzhao,Lin Tianran,Hou Li,Ye Fanggui,Zhao Shulin
The convenience of colorimetric sensors is useful for practical applications. In this work, we constructed a novel colorimetric sensor with magnetic separation ability that can be operated in nearly neutral conditions and achieve one-step detection of metabolites. Magnetic Cu doped Fe 3 O 4 @FeOOH magnetic nanocomposite (Cu/Fe 3 O 4 @FeOOH) with an oxygen vacancy was prepared by a one-step self-assembly hydrothermal method, and fully characterized by different methods. The oxygen vacancy generated by the incorporation of Cu 2+ cations into the Fe 3 O 4 @FeOOH structure was confirmed to be a vital reactive site for enhancing the catalytic activity, which opens up a new way of designing highly efficient enzyme mimics. Benefiting from its inherent horseradish-peroxidase-like activity, a simple and selective enzyme-based colorimetric sensor was developed for one-step detection of H 2 O 2 and cholesterol, and 3,3′,5,5′-tetramethylbenzidine was catalyzed by H 2 O 2 to generate a colored product of oxidized 3,3′,5,5′-tetramethylbenzidine for signaling. H 2 O 2 and cholesterol can be linearly detected in the same range from 0.01 to 0.4 mmol L -1 with detection limits of 0.0075 mmol L -1 and 0.0082 mmol L -1 , respectively. The proposed colorimetric sensor has satisfactory reusability, accuracy, and practicability in human serum samples, indicating its potential application for the detection of different metabolites in the fields of life science and analytical science.
Graphical abstract
研究领域:
分析化学
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生物传感
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材料科学
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生命科学
✓ 已验证
DOI
PubMed
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 6
·1836-1846
·
IF 8.8
Zhang Yu,Teng Xue-Ai,Ma Ze-Qun,Wang Rong-Ming,Lau Woon-Ming,Shan Ai-Xian
For catalytic materials, the characteristics of one-dimension and hollowness are the promotion factors for their full presentation of catalytic activity, and through a template-assisted method, both above superiorities can be fused simultaneously. Here, we proposed a novel strategy inspired by Pearson’s principle with Cu 2 O wires as templates, and prepared FeOOH hollow tubes, which covered by FeOOH scales. When applied as oxygen evolution reaction (OER) catalyst, the FeOOH scaly hollow tubes (FeOOH SHTs) showed outstanding catalytic activity with a low overpotential of 245 mV to drive a current density of 10 mA·cm −2 , excellent kinetics manifesting as a low Tafel slope of 46.9 mV·dec −1 , and robust stability. This work provides a new synthesis strategy for an ideal OER catalyst, FeOOH, with high inherent activity and enhances the feasibility to broaden the design ideas of transition metal-based catalysts. Graphical abstract
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Junli Ma,Zhenzhen Guo,Xu Han,Kaixin Guo,Haoran Li,Ping Fang,Xianbao Wang,Jianguo Xin
As one of the ways to comprehensively utilize solar energy, solar-driven interfacial evaporation displays promising opportunities to alleviate both freshwater and energy shortages. However, there is always a partial impairment of solar energy utilization during evaporation, and its operation is stagnant without sunlight. In this study, a novel asymmetric evaporator is designed that achieves the maximum utilization of solar energy for clean water and power output by two-step asymmetric filtration of reduced graphene oxide/FeOOH (RGO/FeOOH)-based composites and graphene oxide (GO) on a mixed cellulose ester membrane (MCE). Under one solar irradiation , the RGO/FeOOH-based asymmetric evaporator can achieve an average output power of 51.33 mW m −2 synchronously with efficient solar evaporation. The output voltage can reach up to 640 mV with a current of approximately 84.8 μA. Furthermore, the average output power of this evaporator is 26.96 mW m −2 under ambient conditions. A light-emitting diode (LED) can be successfully lit via a series connection of electricity generators. The RGO/FeOOH-based asymmetric evaporator can function full-time with only solar energy and water, demonstrating the potential to generate steam and electricity simultaneously in sunlight; the findings also show its value as a generator on cloudy days or at night. Moreover, the RGO/FeOOH-based composites also show the photocatalytic degradation capabilities of organic pollutants in water. The simple fabrication strategy and superior thermal and electrical performance of the solution indicate that these novel RGO/FeOOH-based composites can be used for power generation , energy storage and brine and wastewater purification to achieve the maximum utilization of resources.
研究领域:
材料科学
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能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Yuezhu Wang,Hanmin Zhang,Baikun Li,Mingchuan Yu,Ran Zhao,Xiaotong Xu,Lu Cai
Novel γ-FeOOH graphene polyacrylamide carbonized aerogel (γ-FeOOH GPCA) was used as the cathode in neutral electro-Fenton (EF) process to achieve degradation and mineralization of sulfamethoxazole (SMX). γ-FeOOH GPCA cathode was fabricated by a multiple-phase carbonization method, leading to a good conductivity (26.37 Sm −1 with 7.5 mg mL −1 GO) and high electrochemically active surface area (EASA). An in situ synthesis method of γ-FeOOH was accomplished to distribute the catalyst uniformly and firmly into the carbonized aerogel framework. Two electron reduction could take place at the cathode, H 2 O 2 and Fe 2+ can be generated at GPCA cathode efficiently. A 5-batch comparative assessment between GPCA-EF and CF-EF process exhibited the distinguished catalytic stability of GPCA cathode with a total organic carbon (TOC) removal efficiency of 89.8 ± 0.8%, 89.1 ± 0.9% and 84.7 ± 1.1% at the last 3 batches, respectively, versus 61.2 ± 1.2, 60.9 ± 1.1 and 59.4 ± 0.9% by CF cathode. This carbonized aerogel cathode demonstrated a great potential for the EF process to remove organic pollutants in water at neutral pH.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Xin Wang,Wangyang Lu,Zhiguo Zhao,Huitian Zhong,Zhexin Zhu,Wenxing Chen
Peroxymonosulfate (PMS) activation with the generation of strongly oxidizing hydroxyl radicals (•OH) and sulfate radicals (SO 4 • − ) has attracted widespread attention for the elimination of organic contaminants. However, the design of an eco-friendly catalytic system with high mineralization rate and high stability remains a challenge. Here, an iron-based photocatalyst (β-FeOOH@g-C 3 N 4 ) for the activation of PMS was prepared by a cyclic microwave-assisted reaction, whereby Fe 3+ was introduced at the nitrogen sites of g-C 3 N 4 , resulting in in situ growth and a uniform distribution of nano-β-FeOOH thereon. β-FeOOH@g-C 3 N 4 maintained high catalytic activity after acid treatment or repeated tests, demonstrating excellent stability and reusability. Moreover, compared with the catalytic systems with β-FeOOH or g-C 3 N 4 alone, the catalytic activity of β-FeOOH@g-C 3 N 4 was increased 5–10 times for the catalytic oxidation of carbamazepine (CBZ) and other emerging contaminants under solar irradiation. Importantly, the CBZ mineralization rate with the β-FeOOH@g-C 3 N 4 /PMS system under solar irradiation was as high as 92%. From the results of electron paramagnetic resonance spectroscopy and radical trapping experiments, large amounts of O 2 • − , 1 O 2 , and Fe V = O are present at the beginning of the reaction, which contribute to the rapid oxidative removal of CBZ, while SO 4 • − and •OH contribute to the deep oxidation, leading to a significantly enhanced total organic carbon (TOC) removal efficiency. This work provides an alternative method for the design of a highly efficient and stable catalyst for PMS activation to eliminate emerging contaminants.
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
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 11
·2005587
·
IF 30.849
Ke Wang,Hongfang Du,Song He,Lei Liu,Kai Yang,Jinmeng Sun,Yuhang Liu,Zhuzhu Du,Linghai Xie,Wei Ai,Wei Huang
Layered γ-type iron oxyhydroxide (γ-FeOOH) is a promising material for various applications; however, its sheet-shaped structure often suffers from instability that results in aggregation and leads to inferior performance. Herein, a kinetically controlled hydrolysis strategy is proposed for the scalable synthesis of γ-FeOOH nanosheets arrays (NAs) with enhanced structural stability on diverse substrates at ambient conditions. The underlying mechanisms for the growth of γ-FeOOH NAs associated with their structural evolution are systematically elucidated by alkalinity-controlled synthesis and time-dependent experiments. As a proof-of-concept application, γ-FeOOH NAs are developed as electrocatalysts for the oxygen evolution reaction (OER), where the sample grown on nickel foam (NF) exhibits superior performance of high catalytic current density, small Tafel slope, and exceptional durability, which is among the top level of FeOOH-based electrocatalysts. Density functional theory calculations suggest that γ-NiOOH in situ generated from the electrooxidation of NF would induce charge accumulation on the Fe sites of γ-FeOOH NAs, leading to enhanced OER intermediates adsorption for water splitting. This work affords a new technique to rationally design and synthesize γ-FeOOH NAs for various applications.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small Methods
·
2024
·
IF 10.7
Yifan Liu,Deke Li,Guangyi Tian,Chenggong Xu,Xionggang Chen,Jinxia Huang,Zhiguang Guo
Solar-driven water evaporation is considered as the sustainable approach to alleviate freshwater resource crisis through direct use of solar energy. However, it is still challenging to achieve the multifunctional solar evaporators equipped with both high evaporation and purification performance to handle practical complex wastewater. Here, a simple and cost-effective multifunctional 3D solar evaporator is prepared by alternately decorating the commercial sponge with FeOOH quantum dots (FQDs) supported MXene sheets composites and chitosan hydrogel coatings for enabling the solar water evaporation and organic wastewater photodegradation simultaneously. MXene composites allow the solar evaporator with excellent photothermal conversion performance, the hydrophilic chitosan hydrogel coated interconnecting skeleton structures of sponge serve as the mass transfer and water transport channels. The Fenton-catalytic FQDs anchored on the MXene sheets surface accept the photo-generated electrons of MXene sheets to induce the organic pollutant photo-Fenton degradation reaction under sunlight irradiation. The resulting evaporator possesses both excellent water evaporation rate of 2.54 kg m −2 h −1 and high degradation efficiency (99.24% for methylene blue), coupled with durable salt-resisting performance during long-term seawater desalination (20 wt.% NaCl). This work provides a simple and feasible strategy for designing multifunctional solar evaporators to meet the potential application scenarios in practice.
研究领域:
环境科学
·
材料科学
·
纳米技术
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可持续能源
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Yuyang Liu,Xuemin Liu,Yaping Zhao,Dionysios D. Dionysiou
The self-assembled synthesis of a hierarchical graphene oxide (GO)-carbon nanotubes (CNTs)-α-FeOOH decorated composite aerogel (α-FeOOH@GCA) through a facile in-situ hydrolysis route is reported for the first time and the materials was tested for its performance as Fenton-like catalyst. The introduction of GO-CNTs clearly mediated the morphology to aligned α-FeOOH nanorods ( ca. 100 nm) within aerogel matrix comparing with pristine urchin-like α-FeOOH three-dimensional microstructures ( ca. 1 μm). This three dimensional porous aerogel network provided efficient charge/mass-transfer leading to great enhancement of the catalytic activity of α-FeOOH. The outstanding catalytic performance of this composite in degradation of organics with different charge and structure, i.e. Orange II (OII), rhodamine B (RhB), methylene blue (MB), phenol and endocrine disruptor bisphenol A (BPA) was demonstrated. For example, the discoloration of OII with pseudo first-order rate constant of 0.10 min −1 significantly exceeded that of pristine α-FeOOH. At relatively low concentration of α-FeOOH@GCA catalyst (125 mg L −1 ) and H 2 O 2 (0.55 mM) showed excellent catalytic activity for efficient (∼99%) discoloration of OII (40 mg L −1 ) under a 60 min UV 365 irradiation in the pH range 3–10. The different charge of five target contaminats greatly determined the surface-catalyzed degradation kinetics at natural solution pH in the order of cationic > neutral > anionic organics due to the negatively charged carbon-based aerogel matrix. The new identified desulfonation intermediates elucidated through UPLC–MS analysis indicated two reaction pathways: 1) hydroxylation and 2) desulfonation by-products followed by cleavage of the azo bond as the predominant degradation pathway of OII. The elimination of the acute toxicity of the parent contaminant to luminescent bacterium Q67 was consistent with the formation of less toxic degradation by-products identified. Free radical quenching studies accessed the role of hydroxyl radical ( OH), superoxide anion radical (O 2 − ) and singlet oxygen ( 1 O 2 ) as the dominating reactive oxygen species (ROS). The quantitative studies to measure radical concentrations using relative molecular probes showed the effective activation of H 2 O 2 led to high rate production of ROS accounted for OII degradation. The greatly enhanced photocatalytic property of this hybrid was correlated with the efficient conversion between Fe 2+ /Fe 3+ and synergistic coupling between α-FeOOH and carbon-based aerogel matrix evidenced through the formation of Fe O C chemical bonds was verified by X-ray photoelectron (XPS) analysis. Based on its simple and scalable preparation route as well as its excellent UV 365 or visible light-responsive catalytic performance, this hybrid exhibits a high potential to be used as an efficient and environmental-friendly catalyst for water remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2013
·Vol. 1
·期 20
·2582-2589
·
IF 0
Mei-Ling Chen,Li-Ming Shen,Shuai Chen,Hui Wang,Xu-Wei Chen,Jian-Hua Wang
β-FeOOH has shown promise as a new contrast agent in magnetic resonance imaging (MRI), however, sensitive and accurate MR imaging is largely limited by its low transverse relaxivity (r2). Herein, for the first time we report in situ growth of β-FeOOH nanorods onto PEGylated graphene oxide (GO) sheets to produce a nanocomposite, e.g., GO-PEG–β-FeOOH. This nanocomposite exhibits a record ultra-high transverse relaxivity (r2) value of 303.81 mM−1 s−1, that is, >60 times higher than those achieved by hitherto reported β-FeOOH based MRI contrast agents. This well facilitates its practical use as a contrast agent for in vivo MR imaging. PEG on the surface of the GO nanocomposite improved the colloidal stability in aqueous medium. In addition, in vitro cell viability tests demonstrated that GO-PEG–β-FeOOH has minimal cellular toxicity. GO-PEG–β-FeOOH has been used for loading doxorubicin hydrochloride (DOX) with a capacity of 1.35 mg mg−1, which exhibits high efficiency in Hela cell apoptosis. These results indicated that GO-PEG–β-FeOOH provides an effective alternative to the existing nanoparticle-based contrast agents for non-invasive in vivo MR imaging and cancer therapy.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
癌症研究
·
医学影像
✓ 已验证
DOI
PubMed
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