ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Boli Zhao,Ying Wang,Junyi Che,Liquan Xiong,Di Gao,Dongsheng Chen
The development of a catalyst that is efficient, clean, simple, inexpensive, and conducive to a wide range of industrial applications is the key to achieving water electrolysis for hydrogen production. In this paper, iron-doped ZIF-67 materials were synthesized using a one-step hydrothermal method, with the different molar ratios of n (Fe3+): n (Co2+) = 0.05%, 1%, 2%, 5%, 10%. We found that trace amounts of iron greatly changed the particle size of ZIF-67. After high-temperature pyrolysis (400 °C, 600 °C, and 800 °C), the electrochemical results showed that the content of doped iron and different pyrolysis temperatures lead to different hydrogen evolution reaction (HER) effects. The 1% Fe/Co-600 sample with the overpotential (202 mV) at 10 mA·cm–2 and the Tafel slope (125.1 mV·dec–1) was significantly lower than other iron-doped materials and exhibited a better HER performance, though still higher than the commercial Pt/C (5 wt %) catalyst with the overpotential of 179 mV at 10 mA·cm–2 and the Tafel slope of 67.8 mV·dec–1. Significantly, the 1% Fe/Co-600 sample has strong stability. After pyrolysis, the 1% Fe/Co-600 sample still had a large specific surface area of 290.1763 m2·g–1 and a porous structure consisting of micropores and mesopores, which improved the catalytic effect. It may provide a new way to modify the catalyst geometry and design and prepare low-cost and high-activity Co-based catalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Yunhua Zheng,Huiting Hu,Long Qian,Yao Zhu,Tao Zhang,Dongya Yang,Fengxian Qiu
The etching effect has the capability to control atom doping and trigger phase transformation, thereby enhancing the electrocatalytic reaction. Herein, iron-doped cobalt selenide (Fe-CoSe2) nanoparticle-decorated carbon nanofibers (Fe-CoSe2/CNFs) are synthesized by assembling an FeCo-Prussian blue analogue (FeCo-PBA) cube precursor with polyacrylonitrile fibers and then treating with hydrochloric acid, followed by gas phase selenization. The Fe-CoSe2/CNFs catalyst exhibits a large surface area and a porous structure, facilitating the permeation of electrolytes. Moreover, orthorhombic CoSe2 is obtained, which is in favor of improving the oxygen evolution reaction (OER). By modulating the etching time, the ideal crystal phase and the optimal amount of the dopant (Fe) can be achieved, thus showing favorable OER activity. Specifically, the Fe-CoSe2/CNFs electrocatalyst enables high electrocatalytic activity for the OER with a low overpotential of 263 mV to drive a current density of 10 mA cm–2 in 1 M KOH. A small Tafel slope of 51 mV dec–1 shows fast charge transfer kinetics. Density functional theory (DFT) calculations reveal that Fe-doped orthorhombic CoSe2(111) can modulate the electron structure, contributing to OH– adsorption ability. Given this, a strategy for phase transformation induced by etching technology is proposed to improve the intrinsic activity of the catalyst.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Jing Li,Feng Li,Jun Jin
Hematite can be used as an efficient photoanode for solar water oxidation , but its oxygen evolution kinetics are quite slow. Herein, we developed an efficient hole transport photoanode via the in situ growth of ultrathin Fe-doped NiOOH on fluorine-doped hematite arrays using a natural growth strategy. The resulting FeNiOOH/F–Fe 2 O 3 photoanode showed a high charge separation and injection efficiency. It achieved a stable photocurrent density of 2.52 mA cm −2 at 1.23 V vs. RHE, which was approximately 4.1-fold higher than that of pristine α-Fe 2 O 3 . Systematic studies revealed that the excellent photoelectrochemical activity was due to heteroatom doping and interactions between the co-catalyst (FeNiOOH) and F–Fe 2 O 3 . Fe doping primarily changed the lattice strain of the co-catalyst, while F doping decreased surface charge recombination and enhanced the intrinsic conductivity of hematite by increasing the carrier density. An ultrathin, amorphous layer of FeNiOOH further accelerated photogenerated hole extraction and the water oxidation kinetics. This work provides a method to produce new, cost-effective photoanodes for clean hydrogen production .
研究领域:
材料科学
·
可再生能源
·
光催化
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DOI
高影响因子
ChemCatChem
·
2018
·Vol. 10
·期 14
·3040-3048
·
IF 4.674
Tingxia Hu,Haiping Li,Na Du,Wanguo Hou
Graphical Iron rules : Fe-doped Bi 2 WO 6 exhibits a much higher photoactivity than Bi 2 WO 6 because of the introduction of the dopant and defect energy levels. The metal-doping of Bi-based oxide photocatalysts to enhance the photocatalytic performance has been a research hotspot in recent years, but the research on the mechanism of doping-induced photoactivity improvement is still incomplete. To illustrate the mechanism completely and clearly, Fe-doped Bi 2 WO 6 , as an example, was synthesized by a facile hydrothermal route. Fe-doped Bi 2 WO 6 exhibits a much higher photoactivity than pure Bi 2 WO 6 in the degradation of Rhodamine B (RhB) and salicylic acid (SA). By replacing W 6+ , the Fe 3+ doping narrows the energy band gap and generates many oxygen vacancies, which can increase the adsorption of both RhB and SA, and the introduced defect and Fe-doping energy levels in the band gap of Bi 2 WO 6 increase the separation efficiency of photoinduced charge carriers significantly. These lead to the considerable photoactivity enhancement of Fe-doped Bi 2 WO 6 . The photoactivity of Fe-doped Bi 2 WO 6 is stable and superior to that of most reported modified Bi 2 WO 6 photocatalysts. This work illustrates in detail the mechanism for the photoactivity improvement of Fe-doped Bi 2 WO 6 , which benefits the research of other metal-doped photocatalysts.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Bolong Jiang,Tianhan Zhu,Hua Song,Feng Li
The Fe-doped Ni 2 P/Fe-SBA-15 was prepared by the temperature programmed reduction method at a relative low temperature of 673 K. The effect of Fe on the catalytic performance for benzofuran (BF) hydrodeoxygenation (HDO) and dibenzothiophene (DBT) hydrodesulfurization (HDS) were investigated. The catalysts were characterized by means of X-ray diffraction (XRD), N 2 adsorption-desorption, inductively coupled plasma mass spectrometry (ICP-MS), X-ray photoelectron spectroscopy (XPS), temperature-programmed desorption of ammonia (NH 3 -TPD), and transmission electron microscope (TEM) and CO uptakes. The results indicate the incorporation of Fe into SBA-15 contributes to the exposure of smaller Ni 2 P particles (5.6 nm) with an uniform dispersion, along with enhancement of weak and medium acid strengths . Compared with Ni 2 P/SBA-15, the Fe-doped Ni 2 P/Fe-SBA-15 exhibited a much higher BF conversion of 91.7% with an improved total deoxygenated product yield of 83.3%. The excellent HDO performance of Ni 2 P/Fe-SBA-15 can be ascribed to the exposure of highly-dispersed smaller Ni 2 P particles. Meanwhile, the improved dehydration of 2-EtPh to EB and the high deoxygenated product selectivity can be attributed to the enhanced acidity. As compared to the Ni 2 P/SBA-15, the Fe-doped Ni 2 P/Fe-SBA-15 showed a higher DBT HDS activity of 96.3% with the BP formation at a great proportion of 90.3%, indicating that DBT was mainly transformed through the desulfurization pathway during HDS.
研究领域:
催化化学
·
能源化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Zhengqiaoruo Zhu,Nan Zhou,Yakun Li,Linlin Zhang
In this study, a novel Fe, S, P co-doped g-C 3 N 4 photocatalytic nanoreactor was successfully synthesized. The unique structure of Fe, S, P co-doped g-C 3 N 4 enhances its optical absorption , and there are plenty of active sites and photogenerated carrier separation. Consequently, the Fe, S, P co-doped g-C 3 N 4 demonstrated excellent photocatalytic-Fenton degradation activities under visible light irradiation. Remarkedly, 5 mg/L of sulfamethazine (SMZ) is completely photocatalytic-Fenton degraded following 25 min under visible light irradiation. It further shows that·O 2 - plays a crucial part in the photocatalytic-Fenton process, leading to the decomposition of sulfamethazine. The decline of Bisphenol A (BPA) further demonstrates that this photocatalytic-Fenton system can be effectively used to remediate pharmaceutical and personal care product contamination in environmental waterways.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Tingting Li,Chengcheng Sun,Chang Xue,Yutao Jiang,Jian Zhang,Lijuan Zhao
Iron (Fe) doped ZnSe microspheres were fabricated by solvothermal method . X-ray diffraction (XRD), Raman analysis, Fourier transform infrared (FT-IR) spectra and X-ray photoelectron spectroscopy (XPS) results indicate that Fe 2+ cations were incorporated into the zinc blende ZnSe lattices successfully and uniformly distributed in sample. SEM images displayed that doping with Fe 2+ cations did not change the morphology of microspheres . The growth mechanism of Fe-doped ZnSe microspheres was proposed. The band gap increases and photoluminescence (PL) peaks in visible region show blue-shift as doping with Fe ions . In addition, a reduction in PL lifetimes in visible range was also observed, which may be due to the increase in non-radiative energy transfer between Fe 2+ doping in the ZnSe matrix. The 5 E↔ 5 T 2 transition of Fe 2+ in the 3.6–5.5 μm spectral range was observed in Fe-doped sample at low temperature.
研究领域:
材料科学
·
光学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xinyu Yang,Bing Hou,Zongsheng Hu,Hao Jiang,Nan Li,Jingwen Pan,Lei Wang
Fluoride (F − ) pollution in surface water seriously endangers ecological safety. Cerium-based adsorbents have original advantages in adsorbing F − such as abundant oxygen vacancies and variable valence states. However, high cost and separation difficulty limit their application in fluoridated surface water treatment. This work synthesized bimetallic oxide adsorbents (FeCe@C) to enhance the efficacy of cerium-based adsorbents for F − removal and systematically examined how Fe(II) doping influenced fluoride removal efficiency. Results indicated that FeCe@C adsorbed F − better than the pure Ce-based adsorbent (Ce@C), with q max = 243.31 mg/g at 25℃, and reached adsorption equilibrium in merely five minutes, with significantly better adsorption performance than fluoride adsorbents reported in previous literature. F − adsorption process aligned with the Temkin (R 2 > 0.963), pseudo-second-order kinetic (R 2 > 0.999) and Elovich model (R 2 > 0.993), suggesting that the F − adsorption mechanism was governed by chemisorption-dominated heterogeneous surface reactions. Further results proved that the doping of iron exhibited a significant effect on the generation of Ce(III) active sites and oxygen vacancies in FeCe@C, which showed a positive correlation (R 2 = 0.87 and 0.98). And unlike other metal doping mechanisms, the doped Fe species promoted the formation of Ce(III) through redox reactions during the adsorption process, achieving the reverse conversion of Ce(IV) to Ce(Ⅲ), rather than directly participating in adsorption. Density functional theory (DFT) calculations demonstrated that iron doping effectively enhanced electron transfer and the interaction between F − and the adsorbent, resulting in a higher F − adsorption capacity. This study provides fundamental theory for enhanced fluoride removal and offers new ideas for elevating the efficacy of cerium-based adsorbents.
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
IONICS
·
2025
·
IF 2.6
Li Dongliang,Wang Xiangnan
La-excess-type lanthanum silicate doped with Fe (La 10 Si 6- x Fe x O 27 , x = 0, 0.2, 0.4, 0.6) was synthesized through planetary ball milling. The resulting materials were systematically characterized for their crystal structure, infrared spectral features, microstructural properties, and electrical conduction behavior. It is revealed that La 10 Si 6- x Fe x O 27 remains apatite type, and Fe is doped into Si site. The surface particles of the La 10 Si 6- x Fe x O 27 ceramic sample are without holes, and the particles are arranged tightly and evenly. The element distribution of La 10 Si 6- x Fe x O 27 ceramic samples is uniform, and the element content conforms to the stoichiometric ratio. Both total and electronic conductivities exhibit a gradual enhancement with increasing iron content. A sensor was fabricated using dense diffusion barrier of La 10 Si 5.4 Fe 0.6 O 27 and solid electrolyte of La 10 Si 6 O 27 . Limiting current meets certain relationship with temperature and oxygen volume fraction, such as lg I L (mA) = − 0.56 − 1.36 × 1000/ T (K −1 ) and I L (mA) = 3.10 + 0.69 × \(\varphi\) (O 2 ) (%). The sensor exhibits CO 2 /H 2 O-insensitive limiting current.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2024
·Vol. 26
·期 2
·1-13
·
IF 2.1
Ye Haiyang,Zhang Li,Qiu Xiaonan,Qiu Jianghong,Xu Wenqing,Xu Xiao,Yu Huijun,Zou Shengqiang,Du Fengyi,Zheng Guojun,Wu Yunchao
Photothermal therapy (PTT) can kill the tumor in situ, but fail to trigger strong antitumor immune response against its recurrence and metastasis. Herein, mannose-grafting Fe-doped carbon dots (M/Fe-CDs) were prepared via hydrothermal carbonization and chemical modification. The prepared M/Fe-CDs had characteristics of excellent optical qualities, good water solubility, and outstanding biocompatibility. Compared with pure CDs, the doping of Fe atom endowed the M/Fe-CDs with a high photothermal conversion efficiency (from 12.1 up to 30.1%). Under 808-nm NIR irradiation, the M/Fe-CDs could lead to local hyperthermia to kill tumor cells. Importantly, the M/Fe-CDs were capable of loading CpG-ODNs via electrostatic absorption and delivering them into the cytoplasm of dendritic cells (DCs). Finally, the CpG-ODNs-loading M/Fe-CDs could significantly increase the CD80/86 expression on the DCs surface. These results demonstrated that the M/Fe-CDs could be used as a versatile nanoplatform to combine the PTT and immune activation for tumor treatment.
研究领域:
生物医学工程
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肿瘤免疫学
·
纳米医学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
·
IF 6.146
Kai Chen,Suqin Ci,Qiuhua Xu,Pingwei Cai,Meizhen Li,Lijuan Xiang,Xi Hu,Zhenhai Wen
The application of electrocatalysts for the oxygen reduction reaction (ORR) is vital in a variety of energy conversion technologies. Exploring low-cost ORR catalysts with high activity and long-term stability is highly desirable, although it still remains challenging. Herein, we report a facile and reliable route to convert ZIF-8 modified by Fe-phenanthroline into Fe-incorporated and N-doped carbon dodecahedron nanoarchitecture (Fe-NCDNA), in which carbon nanosheets are formed in situ as the building blocks with uniform Fe-N-C species decoration. Systematic electrochemical studies demonstrate that the as-synthesized Fe-NCDNA electrocatalyst possesses highly attractive catalytic features toward the ORR in terms of activity and durability in both alkaline and neutral media. The Zn-air battery with the optimal Fe-NCDNA catalyst as the cathode performs impressively, delivering a power density of 184 mW cm –2 and a specific capacity of 801 mAh g –1 ; thus, it exhibits great competitive advantages over those of the Zn-air devices employing a Pt-based cathode electro catalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Qing Cheng,Wulin Yang,Qingling Chen,Jiajun Zhu,Deyi Li,Licai Fu,Lingping Zhou
Maintaining a highly negative value of conduction band (CB) potential of photocatalysts through metal doping has been a great challenge. Herein, we investigated the effects of Fe-doping on the crystal structures and electronic structures of zirconia (ZrO 2 ) in detail by combining experiments and Density Functional Theory (DFT). It was revealed that the Fe-doping obviously triggered the formation of tetragonal phase ZrO 2 and induced a defect states in the bandgap of Fe-doped ZrO 2 . Due to the coherent effect between the electrons of the Fe 3 d orbitals and ZrO 2 intrinsic electronic states, the defect states expanded the light absorption edge of ZrO 2 and Fe-doped ZrO 2 showed a small bandgap with maintaining a highly negative value of the CB potential. Meanwhile, Fe-doping significantly enhanced photoelectrochemical properties, the efficiency separation of electron-hole pairs and photocatalytic activity in comparison with the pristine ZrO 2 . We also found that 0.5%Fe-ZrO 2 exhibited the optimum photocatalytic performance, and reached 96% for degradation of Rhodamine B (RhB) within 150 min under visible light irradiation. This work elucidated the mechanism of the photocatalytic degradation of RhB over Fe-doped ZrO 2 and provided a promising approach in designing highly negative CB potential of ZrO 2 via Fe doping toward sustainable environmental remediation.
研究领域:
材料科学
·
环境科学
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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）