APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Yi Jing Jia,Jin Quan Tao,Hao Ran Liu,Wen Bin Huang,Rongpeng Yao,Miaomiao Niu,Rongrong Li,Qiang Wei,Ya Song Zhou
To enhance the CO 2 hydrogenation activity and low-carbon olefin selectivity of Fe-based catalysts, a strategy involving the use of metal promoters to modulate the structure of active metal centers in catalyst preparation was proposed. The incipient wetness impregnation method was used to introduce modifying agents K and/or Co into the Fe/Al 2 O 3 catalyst. Characterization techniques such as XRD, BET, SEM, HRTEM, H 2 -TPR, XPS, CO 2 -TPD, NH 3 -TPD, and TG were employed to investigate the effects of the modifying agents on the dispersion, reducibility, electronic properties, and acid–base properties of active metal species. Furthermore, the influence of K and Co modification on the CO 2 hydrogenation activity and low-carbon olefin selectivity of Fe/Al 2 O 3 catalysts was explored. The results revealed that the introduction of K generated more basic sites and electron-rich active metal centers in the catalyst, facilitating the adsorption and activation of CO 2 , while suppressing the hydrogenation of olefins and the formation of methane, thus improving the selectivity towards low-carbon olefins. Co promoter facilitated the dispersion of Fe species, exposing more active sites and enhancing the FTS reaction activity, leading to more CO being converted into C 2+ hydrocarbon products. Under the synergistic effect of K and Co, the CO 2 conversion activity of the Fe-based catalyst significantly increased, achieving a CO 2 conversion rate of 37%, while the selectivity towards C 2 -C 4= increased to 31.9%.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yong Xu,Shi Chen,Mingfu Ye,Mingyue Wang,Wenhai Wang,Konglin Wu
Levodopa (LDA) is a principal medication for the treatment of Parkinson’s disease, with its therapeutic efficacy and potential side effects being closely associated with administered dosages. Consequently, the development of sophisticated LDA detection methods is of significant importance. Herein, we present the successful fabrication of an innovative electrochemical sensor utilizing Fe/Fe 3 C nanoparticles supported on activated N-doped carbon spheres (Fe/Fe 3 C-ANC), which makes full use of the large specific area of ANC to accommodate more dispersive Fe/Fe 3 C NPs that exhibits outstanding electrocatalytic activity for LDA oxidation. The experimental findings demonstrate that Fe/Fe 3 C-ANC sensor can deliver wide linear response ranges (1–40 µM) with an impressively low limit of detection of 0.22 µM, surpassing the performance of most previously reported electrochemical sensors. Additionally, the good selectivity of Fe/Fe 3 C-ANC sensor was also proved through measuring a series of LDA structural analogues and potential interfering substances. Furthermore, its excellent selectivity was confirmed through the analysis of LDA structural analogs and potential interferents. The practical utility of the sensor was evaluated by detecting LDA in commercial tablets, spiked human serum and spiked artificial cerebrospinal fluid samples.
研究领域:
医学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Linbo Luo,Sheying Dong,Hao Cui,Longhui Sun,Tinglin Huang
The ecosystems and human health were seriously threatened by hexavalent chromium (Cr(VI)) in wastewater. In this article, using the idea of the highly matched energy band structure between indium sulfide (In 2 S 3 ) and MIL-53(Fe), a Type-II heterojunction has been constructed by loading In 2 S 3 on MIL-53(Fe) microrod to overcome the fault like high recombination rates of photogenerated electron-holes of In 2 S 3 . The composite with 20:1 mass ratio of In 2 S 3 to MIL-53(Fe) (IM-2) was adopted as an optimal sample for efficient photocatalytic Cr(VI) reduction under visible light . Various characterization techniques were used to verify the characteristics of composites and delved into the structure-effect relationship between this heterojunction and its activity. Results showed that the reaction rate constants of the photoreduction process over IM-2 was ~ 4 and 26 times higher than those of pure In 2 S 3 and MIL-53(Fe), respectively, and the catalyst could maintain superior removal efficiency (88.6%) and steady crystal structure after four cycles. First-principles calculations further illustrated that the heterostructure formed between In 2 S 3 and MIL-53(Fe) could effectively accelerate the separation of photogenerated electrons and holes, thus improving the photocatalytic reduction performance. Moreover, the active species analyses revealed that the superoxide radicals and electrons were mainly involved in the reduction of Cr(VI).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Fuad Abduro Bushira,Shimeles Addisu Kitte,Haijuan Li,Lirong Zheng,Ping Wang,Yongdong Jin
Simultaneous highly sensitive and accurate detection of dopamine (DA) and uric acid (UA) is of great importance since they are important biomolecules that are commonly coexisted in the human body and play a crucial role in numerous physiological and pathological features. In this work, Fe-N 5 single atom catalyst (SAC) supported on graphene was firstly employed for simultaneous electrochemical detection DA and UA. Owing to its unique electronic structure and abundant active sites, under optimal conditions, the enzyme-like Fe-N 5 SAC constructed electrochemical (bio)sensor exhibits excellent linear characteristic responses in the range of 0.005–500 and 0.01–480 µM, as well as the low limit of detection of 0.007 and 0.027 nM for DA and UA, respectively. More critically, the developed electrochemical system shows promising merits of exceptional stability, good repeatability, and, consequently, it was successfully applied for simultaneous sensitive detection of DA and UA in human serum samples.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
Journal of Functional Biomaterials
·
2024
·Vol. 15
·期 7
·185
·
IF 5
Yu Wu,Sen Xu,Fengjuan Ding,Weibing Zhang,Haiyan Liu
In this work, a new type of FE-1 COF material is prepared by a reversible imine condensation reaction with diaminoferrocene and diaminodiformaldehyde as materials. The material is connected by imine bonds to form a COF skeleton, and the presence of plenty of nitrogen-containing groups gives the material good hydrophilicity; the presence of metal Fe ions provides the material application potential in the enrichment of phosphopeptides. According to the different binding abilities of N-glycopeptide and phosphopeptide on FE-1 COF, it can simultaneously enrich N-glycopeptide and phosphopeptide through different elution conditions to realize its controllable and selective enrichment. Using the above characteristics, 18 phosphopeptides were detected from α-casein hydrolysate, 8 phosphopeptides were detected from β-casein hydrolysate and 21 glycopeptides were detected from IgG hydrolysate. Finally, the gradual elution strategy was used; 16 phosphopeptides and 19 glycopeptides were detected from the α-casein hydrolysate and IgG hydrolysate. The corresponding glycopeptides and phosphopeptides were identified from the human serum. It proves that the FE-1 COF material has a good enrichment effect on phosphopeptides and glycopeptides.
研究领域:
分析化学
·
蛋白质组学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xin Li,Wanrong Bu,Ke Zhu,Yuwen Chen,Xiaoying Liang,Bin Wang,Yuchen Wang,Kai Yan
Single-atom catalysts (SACs) as photo-Fenton-like catalysts have attracted widespread attention in water purification. However, the development of SACs with renewability, cleanliness, high mass loading, and raw material abundance is a formidable challenge to achieve efficient pollutant removal. In this study, we fabricated high-performance Fe-nanocluster embedded biomass-derived carbon (Fe/Bio-C) from Ficus altissima wastes for quinolone antibiotics degradation. The high-angle annular dark-field scanning transmission electron microscopy with aberration correction (AC-HAADF-STEM) and X-ray absorption fine structure spectroscopy (XAFS) revealed that the Fe/Bio-C exhibited a porous structure with abundant Fe-N 4 active sites. The Fe/Bio-C catalysts achieved an exceptional efficiency of 98.6 % for the removal of the representative quinolone antibiotic, namely lomefloxacin (LOM), within 30 min. Furthermore, an in-depth exploration was conducted to assess the influence of reaction parameters on degradation performance, kinetics, toxicity, and mechanism. The free radical quenching experiments and electron paramagnetic resonance (EPR) spectra demonstrated the existence of ·O 2 − , 1 O 2 , ·OH, SO 4 · − in the reaction system and the ·O 2 − radicals played a relatively important role in the degradation progress. This work broaden the avenue for constructing metal-nanocluster photocatalysts with the high reactivity, low metal leaching, and universality to various pollutants.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 43
·期 17
·15551-15555
·
IF 2.986
Youzhi Wang,Xue Guo,Yurun Feng,Xiao Lin,Hongyu Gong
Ferreous polymer-derived SiCN ceramics (PDCs-SiCN(Fe)) were successfully synthesized by precursor conversion method. The phase composition and microstructure of the obtained products were investigated by XRD , SEM and TEM . The result indicated a mainly amorphous structure with a few α-Fe,and graphite phases in the gaps. The conductivity, electromagnetic parameters and wave absorbing properties of the prepared ceramics were studied at the frequency band from 2 to 18 GHz. The reflectance of PDCs-SiCN(Fe) was about −10 dB (> 90% absorption) in the range of 4–16 GHz with 25 wt% nano-Fe 2 O 3 addition at the thickness 8 mm. The maximum value of dielectric and magnetic loss angle tangent was about 1.5, indicating PDCs-SiCN(Fe) ceramics possessed good absorption performance .
研究领域:
材料科学
·
陶瓷学
·
电磁学
·
功能材料
·
复合材料
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Yujie Yu,Chao Yu,Yazhen Niu,Jun Chen,Yilin Zhao,Yuchan Zhang,Rufei Gao,Junlin He
We designed an amplified detection strategy for the sensitive determination of lead ions (Pb 2+ ) based on a target-triggered nuclear acid cleavage of Pb 2+ -specific DNAzyme as a selectivity interface combined with Pd-Pt alloys modified Fe-MOFs (Fe-MOFs/PdPt NPs) hybrids acting as the signal tag. Streptavidin modified reduced graphene oxide-tetraethylene pentamine-gold nanoparticles (rGO-TEPA-Au) served as a sensor platform for immobilizing more DNAzyme. In the presence of Pb 2+ , the substrate DNA strand can be specifically cleaved at the ribonucleotide site by DNAzyme to produce a new single-DNA on the interface. Then, the hairpin DNA with hybrid strand matched by its complement to the single-DNA was employed to modify the Fe-MOFs/PdPt NPs bioconjugates for signal amplification . Fe-MOFs/PdPt NPs catalyze hydrogen peroxide (H 2 O 2 ) to produce the electrochemical signal which was recorded by chronoamperometry . Benefiting from the Pb 2+ -dependent DNAzyme, the proposed method can selectively detect Pb 2+ in the presence of other metal ions . The newly designed biosensor exhibited a good linear relationship ranging from 0.005 to 1000 nmol L −1 with a low detection limit of 2 pM (S/N = 3) for Pb 2+ . This Pb 2+ -dependent DNAzyme based ultrasensitive biosensor showed high sensitivity and selectivity, providing potential application for Pb 2+ detection in naturally contaminated sewage and spiked drinking water samples.
研究领域:
生物化学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Shi-Wen Lv,Jialu Pan,Xiaoran Wang,Yifan Shao,Yanqing Cong,Lin Che
It is of great significance to establish an effective method for removing Cr(VI) from wastewater. Herein, Fe-doped g-C 3 N 4 (namely Fe-g–C 3 N 4 –2) was synthesized and then employed as photocatalyst to conduct the test of Cr(VI) reduction. Notably, the embedding of Fe ion in g-C 3 N 4 can offer the Fe 2+ /Fe 3+ redox couples, so reducing the interfacial resistance of charge transfer and suppressing the recombination of photogenerated electrons and holes. The impurity energy levels will form in g-C 3 N 4 after the introduction of Fe ion , thereby boosting the light absorption capacity of catalyst. Thus, Fe-g–C 3 N 4 –2 showed good performance in photocatalytic Cr(VI) reduction, and the reduction efficiency of Cr(VI) can reach 39.9% within 40 min. Different with many previous studies, current work unexpectedly found that the addition of p -benzoquinone (BQ) can promote the Cr(VI) reduction, and the reduction efficiency of Cr(VI) over Fe-g–C 3 N 4 –2 was as high as 93.2% in the presence of BQ (1.5 mM). Further analyses showed that BQ can be reduced to hydroquinone (HQ) by photogenerated electrons, and UV light can also directly induce BQ to generate HQ by using H 2 O as the hydrogen donor . The HQ with reducing ability can accelerate the Cr(VI) reduction. In short, current work shared some novel insights into photocatalytic Cr(VI) reduction in the presence of BQ. Future research should consider possible reactions between photogenerated electrons and BQ. For the UV-induced photocatalysis , the suitability of BQ as the scavenger of O 2 •‒ must be given carefully consideration.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Liwei Ma,Shihua Zheng,Guoqiang Li,Xuejun Wang,Kangdi Chen,Guojie Zhang
Fe(II)EDTA can remove NO efficiently, but it has not been industrially applied. This is because the oxygen present in the flue gas will oxidize Fe(II)EDTA and Fe(II)EDTA-NO to Fe(III)EDTA and deactivate them. In order to solve this problem, this paper innovatively proposes to use NaHS to reduce Fe(III) EDTA, because NaHS has high reducing ability and low price. Therefore, a series of experimental conditions were explored in order to obtain the best reaction setup. The results indicate that increasing the concentrations of NaHS, temperature, and pH enhances the rate of NaHS reduction. The mechanism of the increase in reduction rate was studied in depth using potentiometric titration. It was found that an increase in OH - concentration will generate S 8 precipitate, which is beneficial to the forward progress of the reaction and promotes the large-scale production of the active component Fe 2+ . Oxygen is an inevitable factor in actual flue gas, so this study innovatively proposed a kinetic model under aerobic conditions and used this model to predict the trend of Fe(III)EDTA reduction by NaHS. On this basis, NO removal experiments were conducted under high oxygen conditions. After 15 cycles, the reduction performance of NaHS was still very high, and the NO removal rate was higher than 70%. The reason for this phenomenon is that the stabilizer exists in a form that is conducive to the removal of NO by the active component Fe 2+ . Therefore, this study provides theoretical guidance for promoting the industrial application of Fe(II) EDTA technology for NO removal.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Qiushi Jiang,Yanjing Li,Minmin Wang,Wen Cao,Xueying Yang,Sihu Zhang,Liejin Guo
This study investigated the mediating effect of Triethanolamine on Fe@C- Rhodobacter sphaeroides hybrid photosynthetic system to achieve efficient biohydrogen production. The biocompatible Fe@C generates excited electrons upon exposure to light, releasing ferrum for nitrogenase synthesis, and regulating the pH of the fermentation environment. Triethanolamine was introduced to optimize the electron transfer chain, thereby improving system stability, prolonging electron lifespan, and facilitating ferrum corrosion. This, in turn, stimulated the lactic acid synthetic metabolic pathway of Rhodobacter sphaeroides , resulting in increased reducing power in the biohybrid system. The ternary coupling system was analyzed through the regulation of concentration, initial pH, and light intensity. The system achieved the highest total H 2 production of 5410.9 mL/L, 1.29 times higher than the control (2360.5 mL/L). This research provides a valuable strategy for constructing ferrum-carbon-based composite-cellular biohybrid systems for photo-fermentation H 2 production.
研究领域:
微生物学
·
可再生能源
·
光合作用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomaterials Science
·
2018
·Vol. 6
·期 5
·1227-1237
·
IF 5.831
Qianwen Li,Donghui Wang,Jiajun Qiu,Feng Peng,Xuanyong Liu
Hard tissue implant materials which can cause a suitable alkaline microenvironment are thought to be beneficial for stimulating osteoblast differentiation while suppressing osteoclast generation. To make the local pH around the interface between materials and cells controllable, we prepared a series of Mg–Fe layered double hydroxide (LDH) films on acid-etched pure titanium surfaces via hydrothermal treatment. By adjusting the Mg/Fe proportion ratio, the interlayer spacing of Mg–Fe LDHs was regulated, making their OH− exchange abilities adjustable, and this ultimately resulted in a microenvironment with a controllable pH value. In vitro experiments demonstrated that the Mg–Fe LDH film-modified titanium surface possessed good biocompatibility and osteogenic activity, especially the Mg–Fe LDH film with Mg/Fe proportion ratio of 4, which could form a suitable alkaline microenvironment for the growth and osteogenetic differentiation of stem cells. These results demonstrate the potential application of the prepared Mg–Fe LDH films in enhancing the osteogenesis of implant materials while providing a new way into the design of controllable alkaline environment.
研究领域:
生物材料学
·
细胞生物学
·
医学工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）