MOLECULES
·
2023
·Vol. 29
·期 1
·144
·
IF 4.6
Tao Tian,Jie Zhang,Lijiang Tian,Sijie Ge,Zhenyu Zhai
Visible-light-enhanced TiO2nanocatalysts doped with Cu and Fe were synthesized using the sol–gel method to investigate their performance in degrading gaseous benzene. The structure and morphology of mono- and co-doped TiO2(i.e., Cu/Fe-TiO2, Cu-Fe-TiO2) were characterized using SEM, EDS, XRD, BET, Raman, UV-vis-DRS, and XPS techniques. The results indicated that the presence of Cu/Fe mono- and co-doped TiO2leads to the formation of an anatase phase similar to pure TiO2. Furthermore, the introduction of Cu/Fe enhanced the presence of lattice defects and increased the specific surface area of TiO2. This enhancement can be attributed to the increase in oxygen vacancies, especially in the case of Cu-Fe-TiO2. Additionally, Cu-Fe-TiO2showed a higher concentration of surface-bound hydroxyl groups/chemically adsorbed oxygen and a narrower bandgap than pure TiO2. Consequently, Cu-Fe-TiO2exhibited the highest photocatalytic performance of 658.33 μgC6H6/(g·h), achieving a benzene degradation rate of 88.87%, surpassing that of pure TiO2(5.09%), Cu-TiO2(66.92%), and Fe-TiO2(59.99%). Reusability tests demonstrated that Cu-Fe-TiO2maintained a high benzene degradation efficiency of 71.4%, even after five experimental cycles, highlighting its exceptional stability and reusability. In summary, the addition of Cu/Fe to TiO2enhances its ability to degrade gaseous benzene by prolonging the catalyst’s lifespan and expanding its photoresponse range to include visible light.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Nano Research
·
2024
·
IF 9.5
Zhao Yuan,Wang Qingshuang,Yin Dongming,Wang Xiaoli,Li Shouliang,Wang Chunli,Liang Long,Zhao Shaolei,Wang Limin,Cheng Yong
α-AlH 3 is regarded as one of the most promising hydrogen storage materials due to its high hydrogen storage capacity (10.1 wt.%, 148 kg·m −3 ). However, in practical applications, the associated hydrogen release temperature remains relatively high. To effectively address this issue, hollow structured Fe@C nanorods derived from Fe-MOF are introduced as highly efficient catalyst to optimize the dehydrogenation properties of α-AlH 3 . Comparatively, the initial hydrogen release temperature of α-AlH 3 + 3 wt.% Fe@C is reduced to 94.2 °C, which is significantly lower than that of pure α-AlH 3 (137.8 °C). At 100 and 120 °C, it exhibits hydrogen capacities of 5.38 wt.% and 7.47 wt.%, respectively, whereas pure α-AlH 3 only delivers hydrogen capacities of 0.24 wt.% and 5.94 wt.% under the same temperatures. The density functional theory (DFT) calculations further indicate that the existence of Fe@C catalyst can make the length of Al–H bond increase, which is more conducive to the release of hydrogen. The results show that the synergistic effect of Fe and porous carbon in Fe@C nanorods can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Liwei Yang,Yin Wei,Yaqi Peng,Yang Liu,Zhou Shu,Yansong Wang,Qingli Meng,Chuanliang Zhao,Hongmei Zhao,Fashan Yang,Bo Lai
Aiming at realizing heavy metal recycling and resource utilization, a carbon-based bimetallic material (Fe 1 Co 2 @C) was fabricated via calcining cationic resin exchanged with Fe and Co cations. It exhibited superior peroxymonosulfate (PMS) activation performance to degrade atrazine (ATZ) compared with the monometallic materials (Fe@C and Co@C). Fe 1 Co 2 @C/PMS performed high degradation of 5 mg/L ATZ with the reaction rate constant ( k obs ) of 0.0869 min −1 within 30 min of reaction time. The effects of catalyst loading, PMS dosage, initial pH, and the presence of inorganic ions (NO 3 − , SO 4 2− Cl − , and HCO 3 − ) and natural organic matters (NOMs) were also investigated in this work. According to the radical quenching experiments and electron paramagnetic resonance (EPR), hydroxyl radical ( • OH) and sulfate radical (SO 4 • − ) were identified to be the primary reactive oxygen species (ROS) responsible for the ATZ degradation, especially • OH. What’s more, reaction mechanism of Fe 1 Co 2 @C was demonstrated that −(C− SO 3 ) x − Co(II) and the synergy between Fe and Co on the surface could both promote the heterogeneous redox cycles of Co(II)/Co(III) and Fe(II)/Fe(III) to activate PMS. Based on the detection results of intermediates by LC-MS, possible degradation pathways of ATZ included dealkylation, dichlorination, hydroxylation, and deamination-hydroxylation processes were proposed. This research not only provides new insights of PMS activation by carbon-based bimetallic catalyst for water treatment, but also proposes a new way for reusing the waste saturated cation resin waste with heavy metal.
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
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yan Wu,Tao Liu,Bin Ji,Wei Wang
Iron-cobalt alloy is a potential and economical magnetostrictive material, however, our microscopic understanding of the co-electrodeposition process of Fe-Co alloys is still unsatisfactory. In this work, a flat Fe-Co film with 10 μm was successfully prepared by electrodeposition with a non-toxic sulfate solution. The effects of (NH 4 ) 2 SO 4 , an important additive, were studied and DFT calculation was used to analyze the mechanism of (NH 4 ) 2 SO 4 . EIS shows that (NH 4 ) 2 SO 4 can promote the Fe-Co co-deposition process and obviously inhibits the hydrogen evolution reaction. In addition, (NH 4 ) 2 SO 4 can significantly reduce the internal stress of the Fe-Co film by 110,000 MPa, so that the cracks caused by the internal stress are obviously removed. The results of quantum chemistry calculation further show that NH 4 + is more inclined to adsorb on Fe-Co surface than H 2 O and H + , which reduces the hydrogen evolution on the electrode surface. The results are beneficial to improve the Fe-Co co-deposition process, reduce the internal stress and to prepare a high-performance Fe-Co magnetic film. The films will be assembled on the electronic devices with sensors.
研究领域:
材料科学
·
电化学
·
表面化学
·
量子化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Jiahui Deng,Yalin Cheng,Min Liu,Biyang Tu,Shan Xue,Haisheng Tao
In this study, Fe-Mn co-embed sodium alginate carbon spheres (Fe-Mn/SA-C) were prepared as a cost-effective adsorbent for aqueous Cd(II) removal by a facile pyrolysis method. The morphology and chemical composition of Fe-Mn/SA-C were explored with various characterized techniques. The results indicate that Fe-Mn/SA-C possess porous structures and abundant oxide-based functional groups. Fe-Mn/SA-C exhibits excellent adsorption properties for aqueous Cd(II) and the adsorption process is pH-dependent. The adsorption data could fit pseudo second-order and Langmuir models well, suggesting that chemisorption is a dominant adsorption mechanism and the maximum adsorption capacity is 280.11 mg −1 . Thermodynamic analysis demonstrates that the adsorption is spontaneous and endothermic. The adsorption mechanisms of Cd(II) include the complexation of Cd(II) with oxygen-based functional groups, precipitation, and ion exchange. Finally, the granulated and magnetic Fe-Mn/SA-C is an efficient and practical adsorbent for cadmium-containing wastewater treatment.
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
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 32
·16265-16270
·
IF 11.301
Wenjuan Han,Ming Lu,Junnan Chen,Haojie Li,Haibo Li,Bingsen Zhang,Wei Zhang,Weitao Zheng
EMIm+, as a substitute for Li+, can solve the initial problems that accompany lithiation/delithiation processes on an anode. However, the larger size of EMIm+ limits the options when it comes to electrode materials. Herein, a multilayered Ti3C2Tx MXene was electrochemically pre-intercalated with Fe ions to achieve EMIm+ hosting abilities. As a result, a pre-intercalated MXene electrode exhibited enhanced EMIm+ transport and storage capabilities. When integrated with an EMIm+[PF6]− ionic liquid electrolyte, the assembled DIB provides an energy density of 76 W h kg−1 at a power density of 360 W kg−1, and 94.3% of the energy density is retained after 50 cycles. Compared with a pristine example, the Fe pre-intercalated Ti3C2Tx MXene showed a significant increase in electrochemical performance. Employing this approach to optimize layered materials may open up a new route for accurately tuning intercalated materials.
研究领域:
材料科学
·
电化学
·
储能技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Bingzhe Jia,Huailin Yang,Lei Wang,Zhiqi Zhao,Xinming Wu
Compared with most transition metal based electrode materials, 2D M n+1 X n T x has high conductivity and good solvent compatibility. However, its low energy density hinders its application as supercapacitior electrode for electrochemical energy storage applications. Herein, the interface-pillared of Fe-MOF (MIL-100(Fe)) onto Ti 3 C 2 T x MXene layer, which provide rich electrochemical active sites, is achieved, and the MOF nanospheres with MXene nanosheets are subsequently converser into three dimensional multilayer porous nanostructures through the chemical bond couping. Therefore, the MOF nanospheres are anchored between the nansheets of MXene, enabling the fast ion transportation in the three dimensional nanostructures. Menanwhile, the MOF nanospheres prevent the aggregation of MXene nanosheets, and the laminar structure is maintained for more redox reaction sites within the hybrid electrodes through fast charge–discharge cycles. As a result, the MIL-100(Fe)/Ti 3 C 2 T x MXene electrode displays superior energy density (85.53 Wh kg −1 ), which is much higher than the other MXene-based electrodes as far as we know. This design strategy of 2D hybrid electrodes opens up a new way for the commercial application of high perfermance supercapacitor.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Weimo Li,Meixuan Li,Ce Wang,Yen Wei,Xiaofeng Lu
Rational design of highly efficient electrocatalyst for oxygen evolution reaction (OER) is essential to construct high-performance energy devices. In this study, we have developed an electrospinning, in situ polymerization and carbonization process to fabricate Fe doped CoO/C (Fe-CoO/C) nanofibers as efficient OER electrocatalysts. In the synthesized Fe-CoO/C nanofibers, ultrathin carbon layer can be used as conductive network to promote electron transfer and thus improve the electrocatalytic activity. At the same time, additional active sites, like bridged site, formed by Fe doping, also provides the catalyst excellent electrochemical activity in OER. The as-prepared Fe-CoO/C nanofibers exhibit an excellent OER activity with an overpotential of 362 mV at the current density of 10 mA cm −2 in an alkaline medium, which is comparable with the commercial RuO 2 catalyst. After 2500 cyclic voltammograms (CVs) cycles test, the catalyst still maintains the initial electrocatalytic activity, demonstrating a great durability. This strategy introduces both carbon layer and Fe doping to increase the conductivity and the density of active sites of CoO nanofibers, thus enhancing the electrocatalytic activity and stability. This work offers an efficient route to develop low-cost and highly active transitional metal oxide-based OER electrocatalyst for potential renewable electrochemical energy conversion and storage.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Na Liu,Yinhui Li,Minggu Zhang,Naiju Che,Xianliang Song,Yanli Liu,Chengliang Li
As the substitutes of legacy long-chain per-/polyfluoroalkyl substances (PFASs), short-chain PFASs have been widely detected in the environment. Compared to long-chain PFASs, short-chain PFASs have smaller molecules and are more hydrophilic. Therefore, they are more likely to experience long-distance transport and pose lasting environmental impacts. In this study, Fe-doped (R-Fe) and Cu-doped biochars (R-Cu) were prepared using reed straw biochar (R). The results showed that the PFBA and PFPeA sorption capacities of R-Fe were 25.81 and 43.59 mg g −1 , 1.65 and 1.55 times higher than those of R, respectively. The PFBA and PFPeA sorption capacities of R-Cu were 19.34 and 33.69 mg g −1 , 1.24 and 1.20 times higher than those of R, respectively. In addition, R, R-Fe, and R-Cu exhibited higher PFBA and PFPeA sorption capacities than the biochars previously reported. The excellent PFAS sorption performances of the biochars were attributed to the highly porous structure of R, which provided rich adsorption sites. Ion-pair sorption, pore filling, electrostatic interaction between the Fe/Cu and cationic groups on biochar and the anionic groups of PFASs, and hydrophobic interaction between the hydrophobic surface of biochar and the fluorinated tails of PFASs were the underlying sorption mechanisms. The biochars presented high removal rates (>86 %) of multiple PFASs (∑PFAS: 350 μg L −1 ) from synthetic wastewaters, including legacy and emerging PFASs of different chain lengths and with different functional groups. The biochars reported in this study are promising candidate adsorbents for treating waters contaminated with short-chain PFASs.
CAS / MDL:
研究领域:
环境科学
·
污染控制
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产品关联
DOI
PubMed
高影响因子
JOM
·
2023
·Vol. 76
·期 2
·969-975
·
IF 2.6
Liu Hanning,Liu Peidong,Tian Qinghua,Dong Zhaowang,Chen Yubing,Guo Xueyi
Fe-36Ni invar alloys (Invar 36 alloys), which have a low thermal expansion coefficient (CTE) and good mechanical properties, are typically produced through a high-pollution smelting process. A green and quick-process method for the two-step hydrogen reduction of a designed mixture of Fe 2 O 3 and NiO powders was developed to prepare Fe-36 wt.%Ni alloys. A dense Fe-36 wt.%Ni alloy with an oxygen content of 0.20 wt.% was successfully produced. A single γ -FeNi phase was identified at 1000°C, whereas grains and twins became more evident at 1100°C. The final alloy exhibited excellent mechanical properties at room temperature, showing a hardness of 154 HV, a tensile strength of 486 MPa, a yield strength of 251 MPa, and a fracture strain of 21%.
研究领域:
材料科学
·
冶金工程
·
结构合金
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Jingwu Zheng,Siyuan Wang,Shuan Zhang,Wei Cai,Liang Qiao,Haibo Chen,Yao Ying,Wangchang Li,Jing Yu,Shenglei Che
In this paper, a corrosion-resistant glutamic acid (Glu)-Cu-Nano-Al 2 O 3 composite coating with both hydrophobicity and self-healing characteristics was electrodeposited on the sintered Nd-Fe-B surface. The influence of the amount of Nano-Al 2 O 3 added in the acidic Cu 2+ -glutamate (Glu 2− ) solution on the performance of the composite coating was studied, the results show that Nano-Al 2 O 3 inclusion can make the surface of the composite coating appear papillary particles and make the composite coating hydrophobic. By analyzing the products of the composite coating after corrosion in 3.5% NaCl solution, it is shown that the codeposition copper dihydroglutamate (CuGlu 2 H 2 ) and Glu particles in the composite coating are released and dissolved in the solution with pH = 6.5 after copper corrosion, and then complexed with Cu 2+ produced by corrosion to form an insoluble copper glutamate (CuGlu) passive film, which was deposited on the corroded coating to achieve self-repairing function and prevent further corrosion. The hydrophobicity and self-repairing function of the composite coating ensure that the sintered Nd-Fe-B has excellent corrosion resistance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Yi Gu,Yang Jiao,Ya Ruan,Jing Yang,Yaling Yang
Herein, a nanocomposite of Cu,Ce-containing phosphotungstates (Cu,Ce-PTs) with outstanding laccase-like activity was fabricated via a one-pot microwave-assisted hydrothermal method. Notably, it was discovered that both Fe 3+ and Cr 6+ could significantly enhance the electron transfer rates of Ce 3+ and Ce 4+ , along with generous Cu 2+ with high catalytic activity, thereby promoting the laccase-like activity of Cu,Ce-PTs. The proposed system can be used for the detection of Fe 3+ and Cr 6+ in a range of 0.667–333.33 μg/mL and 0.033–33.33 μg/mL with a low detection limit of 0.135 μg/mL and 0.0288 μg/mL, respectively. The proposed assay exhibits excellent reusability and selectivity and can be used in traditional Chinese medicine samples analysis.
研究领域:
生物化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）