JOURNAL OF CHROMATOGRAPHY A
·
2012
·
IF 4.531
Yan-Yan Fu,Cheng-Xiong Yang,Xiu-Ping Yan
Metal-organic framework MIL-100(Fe) was explored as a novel stationary phase for both normal-phase and reverse-phase high performance liquid chromatography. Two groups of analytes (benzene, toluene, ethylbenzene, naphthalene and 1-chloronaphthalene; aniline, acetanilide, 2-nitroaniline and 1-naphthylamine) were used to test the separation performance of MIL-100(Fe) in the reverse-phase mode, while the isomers of chloroaniline or toluidine were employed to evaluate its performance in the normal-phase mode. The MIL-100(Fe) packed column gave a baseline separation of all the tested analytes with good precision. The separation was controlled by negative enthalpy change and entropy change in the reverse-phase mode, but positive enthalpy change and entropy change in the normal-phase mode. The relative standard deviations of retention time, peak area, peak height, and half peak width for eleven replicate separations of the tested analytes were 0.2–0.7%, 0.5–3.6%, 0.6–2.3% and 0.8–1.7%, respectively. The mesoporous cages, accessible windows, excellent chemical and solvent stability, metal active sites and aromatic pore walls make MIL-100(Fe) a good candidate as a novel stationary phase for both normal-phase and reverse-phase high performance liquid chromatography.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2013
·
IF 3.258
Yan Xu,Yan He,Xiaoli Feng,Luyi Liang,Jianming Xu,Philip C. Brookes,Jianjun Wu
A novel Fe(III) reducing bacterium, Clostridium beijerinckii Z, was isolated from glucose amended paddy slurries, and shown to dechlorinate pentachlorophenol (PCP). Fifty percent of added PCP was removed by C. beijerinckii Z alone, which increased to 83% in the presence of both C. beijerinckii Z and ferrihydrite after 11 days of incubation. Without C. beijerinckii Z, the surface-bound Fe(II) also abiotically dechlorinated more than 40% of the added PCP. This indicated that the biotic dechlorination by C. beijerinckii Z is a dominant process causing PCP transformation through anaerobic dechlorination, and that the dechlorination rates can be accelerated by simultaneous reduction of Fe(III). A biochemical electron transfer coupling process between sorbed Fe(II) produced by C. beijerinckii Z and reductive dehalogenation is a possible mechanism. This finding increases our knowledge of the role of Fe(III) reducing genera of Clostridium in dechlorinating halogenated organic pollutants, such as PCP, in anaerobic paddy soils.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2015
·Vol. 145
·期 3
·784-793
·
IF 2.307
Zhang Xuejun,Zhang Peipei,Yu Hongbo,Ma Zhen,Zhou Shenghu
Abstract Bimetallic PdM (M = Ni, Co, Fe) nanoparticles were synthesized using butyllithium as a reductant, and were used to prepare Pd–M
x
O
y
/KIT-6 catalysts by appropriate oxidation and reduction treatments. These catalysts showed higher selectivity in the hydrogenation of p -chloronitrobenzene to p -chloroaniline than Pd/KIT-6. Relevant characterization was conducted using X-ray diffraction, transmission electron microscopy, N 2 adsorption–desorption, X-ray photoelectron spectroscopy, inductive coupled plasma emission spectrometer, and H 2 temperature-programmed reduction. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 34
·17866-17873
·
IF 7.443
Gan Wang,Wan-hua Wang,Li-Kun Wang,Wei-Tang Yao,Peng-Fei Yao,Wen-Kun Zhu,Ping Chen,Qing-Sheng Wu
Electrocatalysts for the oxygen reduction reaction (ORR) in acidic media are crucial in proton-exchange membrane (PEM) fuel cells and other electrochemical devices. Achieving ideal ORR activity and durability in acidic media remains a challenge. Here, we developed a new NFeCo-CNT/NC nanocomposite electrocatalyst from the highly available and recyclable plant biomass Typha orientalis using a readily scalable approach. The electrocatalyst exhibits excellent ORR activity, superior stability and tolerance to methanol poisoning effects in acidic media. The value of the onset potential and half-peak potential of the typical product is only 70 mV and 65 mV less than that of Pt/C, respectively. The NFeCo-CNT and NFeCo-NC in the nanocomposite have synergistically enhanced ORR activities. The catalyst may have practical applications in fuel cells. One of the important accomplishments of this work is the discovery that trace Fe3+ and Co2+ can synergistically catalyze the growth of the carbon nanotubes when melamine serves as the CNT precursor.
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2016
·
IF 9.407
Chunwei Dong,Dong Yao,Jianyou Feng,Tingting Huang,Xiyu Hu,Zhennan Wu,Yi Liu,Bai Yang,Hao Zhang
Hollow nanostructures have shown charming properties beyond their solid counterparts, but the synthesis of multinary chalcogenide semiconductors with hollow nanostructures remains challenging, because of their complex components. In this work, we demonstrate a facile one-pot method to synthesize Cu2GeS3 hollow nanoparticles (NPs) based on Kirkendall effect by using dissolved GeO2 as the Ge source. A theory model according to the diffusion kinetic and reaction kinetic is established to investigate the growth mechanism of Cu2GeS3 hollow NPs. By using Cu2GeS3 hollow NPs as the template, quaternary Cu2MGeS4 (M = Zn, Ni, Co, Fe and Mn) hollow NPs are further produced, which are more difficult to prepare, because of their excessive ion species. Furthermore, Cu2GeS3 hollow NP-based gas sensors are prepared, which exhibit outstanding sensitivity for the detection of ethanol gas, because of their large surface-to-volume ratio and small grain size.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 80
·76867-76873
·
IF 3.289
Yunfei Zhang,Bo Yang,Jinhong Fan,Luming Ma
In this study, abrasives-reinforced metal matrix composites (MMCs) with a microscale size synthesized by ball milling (BM) could achieve highly active and stable dechlorination efficiency for aqueous 2-chlorophenol (2-CP). The preparation process of this composite via BM was optimized to obtain a high degradation efficiency, especially for the effect of the abrasives including B4C, SiC, α-Al2O3, SiO2, Fe3O4 and Na2SO4. The results showed that the hardness of the abrasives in the Fe-based MMCs was closely related with their dechlorination performance. Subsequently, the optimal abrasive, i.e. SiO2 was further investigated for its proper milling conditions with zero-valent iron (ZVI) particles including optimal SiO2 size, SiO2 loading, milling time, and the dosage of the process control agent (PCA). Additionally, the influence of other metal categories including Al and Si was also investigated for dechlorination; and their low reaction efficiencies were closely related with their passivating film. Finally, the longevity test suggested that the decreased reactivity of the SiO2–Fe MMC during the storage in air could be recovered when consecutively used, mainly due to the promoting effects of the inherent structure of SiO2–Fe MMC with the Fe/C and Fe/SiO2 interfaces, as well as the effective regeneration of the reactive sites by continuous iron dissolution.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Bao Men,Yanzhi Sun,Jia Liu,Yang Tang,Yongmei Chen,Pingyu Wan,Junqing Pan
Although N-doped graphene-based electrocatalysts have shown good performance for oxygen reduction reaction (ORR), they still suffer from the single-type active site in the as-prepared catalyst, limited accessible active surface area because of easy aggregation of graphene, and harsh condition for preparation process of graphene. Therefore, further developing a novel type of graphene-based electrocatalyst by a facile and environmentally benign method is highly anticipated. Herein, we first fabricate a sandwich-like graphene/carbon hybrid using graphene oxide (GO) and nontoxic starch. Then the graphene/carbon hybrid undergoes postprocessing with iron(III) chloride (FeCl3) and potassium sulfocyanide (KSCN) to acquire N-doped graphene/carbon nanosheets decorated by Fe and S. The resultant displays the features of interpenetrated three-dimensional hierarchical architecture composed of abundant sandwich-like graphene/carbon nanosheets and low graphene content in as-prepared sample. Remarkably, the obtained catalyst possesses favorable kinetic activity due to the unique structure and synergistic effect of N, S, and Fe on ORR, showing high onset potential, low Tafel slope, and nearly four-electron pathway. Meanwhile, the catalyst exhibits strong methanol tolerance and excellent long-term durability. In view of the multiple active sites, unique hierarchical structure, low graphene content, and outstanding electrochemical activity of the as-prepared sample, this work could broaden the thinking to develop more highly efficient graphene/carbon electrocatalysts for ORR in fuel cells.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 16
·7197-7204
·
IF 2.7
Han Zhang,Xiaodan Qi,Zhifei Wang,Lihua Jin,Yehua Shen
The exploration of efficient, easily fabricated and inexpensive carbon-based nanozymes with accessible active sites is important for expanding the applications of nanozymes. In this study, an Fe and N co-decorated porous carbon framework (Fe–N–C) derived from walnut shells was designed and prepared by microenvironment modulation consisting of chemical activation and pore-making engineering. The hierarchical pore size distribution not only can increase the exposure of defects and provide a suitable environment for the favorable incorporation of Fe–Nx active sites into carbon matrixes, but also can provide a higher specific surface area to facilitate substrate binding. For these reasons, the prepared Fe–N–C material was found to possess excellent oxidase-like activity, which could catalyze the activation of dissolved oxygen to produce reactive oxygen species (ROS) to oxidize chromogenic substrates. Interestingly, this oxidase mimic behavior would be effectively suppressed by an antioxidant – hydroquinone (HQ). Based on this observation, we proposed a sensitive and visible colorimetric platform for HQ assay, with a detection limit of 0.09 μM. This research not only provides new ideas for the preparation of economical carbon-based nanozymes, but also further expands the application of biomass-based carbon materials as nanozymes in the field of environmental pollutant detection.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Lingjie Liu,Shaoqing Mo,Shaopo Wang,Jing Chang,Jianhui Zhao,Jingjie Yu
Low temperatures were a critical factor that inhibited anaerobic ammonium oxidizing bacteria (AnAOB) activity. This study demonstrated the effect of exogenous zero-valent iron (ZVI) on Anammox-hydroxyapatite (HAP) system at 17°C. The results showed that long-term addition of ZVI increased the system nitrogen removal efficiency by 8.59% and alleviated the inhibition of AnAOB by low temperature. After addition of ZVI, the activity of AnAOB and the heme c content increased by 58.20% and 4.83%, respectively. Moreover, the functional enzyme activities of NIR, HZS, and HZO increased by 94.12%, 36.36%, and 16.67%, respectively. The concentrations of quorum sensing molecules, i.e., C 6 -HSL and C 8 -HSL, increased by 191.17% and 41.54%, respectively, after ZVI addition. Metagenomic analysis revealed that the addition of 5 g/L ZVI stimulated the relative abundance relative abundance of Fe(II) metabolism-related genes in AnAOB at 17 °C, thereby contributing to the uptake, transport, utilization, and storage of Fe(II). The addition of ZVI could improve the nitrogen removal performance of the anammox-HAP system at the low temperature.
✓ 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
Xinyue Gu,Minghua Li,Ya Yan,Julian Miao
The convenience and high efficiency of recently developed I–III–VI group AgInS 2 (AIS) fluorescence sensors have garnered considerable attention. In this study, glutathione (GSH) was employed as a stabilizer to synthesize Mn doped AgInS 2 quantum dots (Mn-AIS QDs) via a one-step hydrothermal method at a lower temperature. The resultant samples displayed favorable photoluminescent characteristics and excellent water dispersibility. The photoluminescence of Mn-AIS QDs is quenched by Fe (III) via a photo-induced electron transfer mechanism (PET), and this quenching can be reversed by ascorbic acid (AA) as a result of the redox reaction between the Mn-AIS-Fe (III) complex and AA. Utilizing the on–off–on fluorescence principle, a fluorescence switch sensor based on Mn-AIS QDs was developed for the detection of Fe (III) and AA. The linear range for the detection of Fe (III) using the Mn-AIS QDs sensor was established to be 0.03–120 µM, with a detection limit (LOD) of 0.16 nM. For the detection of AA within the Mn-AIS-Fe (III) system, the linear range spanned from 0.05 to 180 µM, with a LOD of 0.031 µM. Both Mn-AIS and Mn-AIS-Fe (III) demonstrated robust anti-interference properties, facilitating the accurate detection of Fe (III) in tap water and AA in vitamin C tablets. This approach is notable for its simplicity, cost-effectiveness, and considerable potential for application in the creation of innovative biological and environmental sensors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 2
·393
·
IF 3.2
Hongyan Zhu,Xinyu Li,Shijie Li,Ximing Wang,Yabo Ma,Jin Zhang,Yunpeng Ren,Jianguo Zhao
Desalinating seawater is a crucial method for addressing the shortage of freshwater resources. High-efficiency, low-cost, and environmentally friendly desalination technologies are key issues that urgently need to be addressed. This work usedPopulus tomentosa Carr.as a matrix material and preparedPopulus tomentosa Carr.@Fe-GA through a complexation reaction to enhance the water evaporation rate and photothermal conversion efficiency of seawater desalination. The concentration of the impregnation solution was further refined, and the bonding mechanism along with the thermal stability of the composite photothermal material was investigated, including an assessment of their photothermal conversion efficiency. The research results indicate that the evaporation rate of water in a 3.5% NaCl solution forPopulus tomentosa Carr.@Fe-GA under light intensity conditions of one sun reached 1.72 kg·m−2·h−1, which was an increase of 44.5% compared to untreatedPopulus tomentosa Carr.It achieved a photothermal conversion efficiency of 95.1%, an improvement of 53.6% over untreatedPopulus tomentosa Carr., and maintained stability and high evaporation performance (95.4%) even after prolonged rinsing. This work realizes the functional utilization of seawater desalination withPopulus tomentosa Carr.and offers a novel approach for the development and use of wood-derived photothermal material.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Shaorong An,Qiang Jin
The development of highly dispersed metal-based materials loaded on carbon is of great importance for environmental remediation. However, their catalytic activities face huge challenges. In this study, a series of super activated carbon-supported Fe-Al layered double hydroxides (FeAl-LDH@SAC x ) were prepared, and the peroxymonosulfate (PMS) oxidation performance and activation mechanism were probed with Rhodamine B (RhB) as a representative pollutant. Results showed that FeAl-LDH@SAC 0.02 composites exhibited superior ability in activating PMS compared to other catalysts, as evidenced by the rate constants for RhB degradation, which followed the order: FeAl-LDH@SAC 0.02 (0.5507 min −1 )>FeAl-LDH@SAC 0.04 (0.4738 min −1 )>FeAl-LDH (0.4121 min −1 )>FeAl-LDH@SAC 0.01 (0.3512 min −1 )>FeAl-LDH@SAC 0.08 (0.2701 min −1 ). The optimal doping amount for SAC depended on the ratio of active FeAl-LDH and its dispersion on the SAC, which helped to promote interfacial electron transfer. Impressively, the sulfate radicals (SO 4 · − ), hydroxyl radical (·OH), and singlet oxygen ( 1 O 2 ) made major contributions to RhB removal. The results of the toxicity assessment showed that the overall toxicity of the system tended to decrease as the catalytic oxidation proceeded. Finally, the effective removal of aromatic proteins and soluble microbial metabolites in actual dye wastewater within 60 min demonstrated that the catalytic oxidation system involving FeAl-LDH@SAC 0.02 was promising for water treatment.
✓ 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）