TRANSACTIONS OF TIANJIN UNIVERSITY
·
2024
·
IF 6.7
Liu Weihao,Liu Qingtao,Wan Xin,Shui Jianglan
Non-precious metal electrocatalysts (such as Fe–N–C materials) for the oxygen (O 2 ) reduction reaction demand a high catalyst loading in fuel cell devices to achieve workable performance. However, the extremely low solubility of O 2 in water creates severe mass transport resistance in the thick catalyst layer of Fe–N–C catalysts. Here, we introduce silicalite-1 nanocrystals with hydrophobic cavities as sustainable O 2 reservoirs to overcome the mass transport issue of Fe–N–C catalysts. The extra O 2 supply to the adjacent catalysts significantly alleviated the negative effects of the severe mass transport resistance. The hybrid catalyst (Fe–N–C@silicalite-1) achieved a higher limiting current density than Fe–N–C in the half-cell test. In the H 2 –O 2 and H 2 –air proton exchange membrane fuel cells, Fe–N–C@silicalite-1 exhibited a 16.3% and 20.2% increase in peak power density compared with Fe–N–C, respectively. The O 2 -concentrating additive provides an effective approach for improving the mass transport imposed by the low solubility of O 2 in water.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Shuai Liu,Dicka Ar Rahim,Yan Zhang,Dan Wang,Ekkachai Kanchanatip,Yi He,Mi Yan
To advance the utilization of high-concentration CO2 produced in biogas upgrading, it is essential to remove associated hydrogen sulfide (H2S). This study presents a series of bimetallic Fe–Cu oxides supported on multi-walled carbon nanotubes (MWCNTs), which were synthesized to efficiently remove H2S from CO2-rich gas at low temperatures. The synergy of the bimetallic elements not only forms a multifaceted active phase but also causes new defects on the MWCNTs, creating more H2S/CO2 separation sites. The adsorption experiments demonstrate that the deep H2S removal performance of the adsorbent is unaffected by the CO2 concentration, achieving a maximum adsorption capacity of 30.11 mg g−1, which exceeds that of commercial desulfurizers and previously reported adsorbents. Additionally, density functional theory calculations were employed to elucidate that the introduction of Cu species increases the gap in the average adsorption energies between H2S and CO2. The adsorbent also exhibited stability after 4-cycle regeneration at room temperature, maintaining 62.6% of its initial H2S capacity. This work underscores the potential of Fe–Cu oxide/MWCNTs adsorbents as a viable, regenerable solution for H2S removal in CO2 purification, offering implications for carbon-negative construction.
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Zhan Tian,He Wang,Guoqiang Li,Hongrui Jia,Guoxin Zhang
NiFe 2 O 4 has emerged as an efficient oxygen evolution reaction (OER) electrocatalyst, with outstanding stability in alkaline media and excellent redox properties. In order to further improve the catalytic performance, thinly-walled NiFe 2 O 4 nanotubes (NiFe 2 O 4 -NTs), efficiently derivable from Ni, Fe, N-codoped carbon nanofibers, were innovatively synthesized through a sequential route combing hydrothermal, electrospinning, and high-temperature sintering in this work. The NiFe 2 O 4 -NTs possess large diameter of around 120 nm and their thickness of the tube wall is only about 10 nm. The surface properties of NiFe 2 O 4 can be adjusted by forming the Ni-N/Fe-N bonds. Excitingly, largely exposed active surface area and boosted catalytic reaction kinetics toward oxygen evolution reaction are realized. The required overpotential to deliver 10 mA cm −2 is only 331 mV, accompanied with favorable Tafel slope of only 51.8 mV dec −1 , small charge transfer resistance, and superior reaction stability.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 8
·3467-3477
·
IF 3.3
Wenhui Hu,Zhongxin Song,Lingna Sun,Lei Zhang,Qianling Zhang,Xiangzhong Ren,Yongliang Li
Efficient separation of photogenerated charge carriers is essential for maximizing the photocatalytic efficiency of semiconductor materials in oxygen evolution reactions (OER). This study presents a novel trimetallic photocatalyst, MIL-100(Fe)/TiO2/CoOx, synthesized through a facile microwave-assisted hydrothermal method followed by atomic layer deposition (ALD). The porous MIL-100(Fe) serves as a support for the sequential deposition of TiO2 and CoOx layers via ALD, which enhances electron–hole pair separation and minimizes their recombination. Characterization using transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) confirms the uniform deposition of TiO2 and CoOx layers on the MIL-100(Fe) surface. The optimized photocatalyst, processed with 20 deposition cycles of Co, exhibits exceptional photocatalytic OER performance, with an oxygen evolution rate of 558.3 μmol g−1 h−1. This enhancement in activity is attributed to the synergistic interaction between the spatially separated TiO2 and CoOx cocatalysts, which facilitates efficient charge transfer and increases the number of active sites. These findings highlight the potential of ALD-fabricated heterostructures in the development of advanced photocatalysts for sustainable energy production.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qihui Wang,Xingyu Yang,Changwen Li,Chenyu Zhao,Yujie Huang,Shuqi Qiu,Yaru Qin,Chenglong Shi
The titanium-based lithium ion sieve adsorbent H 2 TiO 3 (HTO), known for its structural stability and high adsorption capacity, emerges as a highly promising material. Nonetheless, its precursor, the Li 2 TiO 3 powder (LTO), synthesized via the high-temperature solid-phase method, tends to agglomerate and poses challenges in separation. This agglomeration compromises the adsorption sites and, consequently, its adsorption capacity. To counter this, we employed a strategy of doping LTO with magnetic Fe 3 O 4 nanoparticles as a Fe source, aiming to mitigate the agglomeration issue. Subsequently, Fe-doped H 2 TiO 3 (HFTO) was obtained by acid washing and used to adsorb lithium ions from an aqueous solution. Experimental results revealed that HFTO's equilibrium adsorption capacity for lithium in LiCl solution peaked at 34.27 mg/g. Moreover, even after five cycles of adsorption–desorption, HFTO maintained an adsorption capacity exceeding 32.00 mg/g. Investigations into HFTO's adsorption mechanism, utilizing Raman spectroscopy, FT-IR, and XPS , uncovered that the adsorption of Li + by HFTO occurs through the dissociation of O–H bonds and the subsequent formation of O-Li bonds.
✓ 已验证
产品关联
DOI
高影响因子
AQUA-Water Infrastructure Ecosystems and Society
·
2024
·Vol. 73
·期 8
·1671-1682
·
IF 2.1
Li Dajie,Chu Xiao,Chen Chen,Cheng Jun,Huang Weiwei,Yang Fei,Yi Xuesong
To further investigate the synergistic effects of Fe (Ⅲ) and graphene derivatives with varying degrees of oxidation for photocatalysis, commercial titanium dioxide nanoparticles and graphene oxide were employed as precursors to synthesize the catalyst in this study. Graphene oxygenated derivatives and Fe (Ⅲ)-modified titanium dioxide photocatalysts with different oxidation degrees were prepared using a simple one-step solvothermal method. The results demonstrated that the photocatalytic performance in degrading rhodamine B and sulfamethoxazole was enhanced with an increase in the oxidation degrees of graphene materials. Through the combined action of delocalized conjugated π electrons as electron transfer mediators, Fe (Ⅲ) as an electron trap, and photosensitization reactions, titanium dioxide exhibited exceptional photocatalytic properties with the assistance of graphene derivatives and Fe (Ⅲ) co-catalysts in the degradation of organic compounds. We developed a distinctive and straightforward method for fabricating graphene oxide and Fe(III) co-modified titanium dioxide catalysts. The quantity of oxygen-containing functional groups on the surface of graphene oxide precursors was controlled through thermal reduction. The synergistic impact of graphene derivatives and Fe (III) dual co-catalysts was further enhanced.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 18
·8277-8289
·
IF 2.7
Menghe Liu,Congyang Zou,Yong Wang,Zhuyou Zhou,Yufeng Ji
In this paper, the precursors of the target product were prepared using a simple solvothermal method. After pyrolysis of the precursors, a three-dimensional Fe/CuFe2O4@C (referred to as FCC) nanomaterial with a relief texture was successfully prepared, which was employed as a novel catalyst material for activated persulfate (referred to as PS) degradation, tetracycline (referred to as TC), in wastewater. X-ray photoelectron spectroscopy (XPS) revealed that Fe(III) and Cu(II) served as the primary active metal ions, while the formation of a surface carbon shell positively influenced electron transfer during catalytic degradation. A comprehensive investigation was conducted to assess the efficiency of FCC nanocatalysts in degrading TC under various conditions. The results demonstrated that the degradation rate of TC in the 100 min range was about 96% at concentrations of 0.2 g L−1 FCC and 1 mmol L−1 persulfate and pH 7. Quenching experiment results and EPR results consistently indicated that both free radical and non-radical pathways involved in TC degradation by FCC nanomaterials, and sulfate radicals, hydroxyl radicals, superoxide radicals and singlet oxygen were identified to be the main active substances. The degradation intermediates were analyzed by liquid mass spectrometry and toxicology. FCC, as a catalyst exhibiting high catalytic activity, demonstrates superior performance in the activated persulfate degradation of TC. The environmental risk associated with the degradation of intermediate products is significantly lower than that of TC itself. FCC holds significant potential for the degradation of antibiotics in wastewater.
✓ 已验证
产品关联
DOI
高影响因子
MICROBIAL PATHOGENESIS
·
2025
·
IF 3.5
Qiaowen Wang,Xiao Huang,Dingjun Wang,Biying Zhong,Mengyuan Xu,Li Liu,Tiantian Liu
Background Multidrug-resistant Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) are emerging in large numbers, while the rapid development of antimicrobial nanomaterials offers new opportunities to combat bacterial infections and antimicrobial resistance. Objectives We employed the nanomaterial MIL-101(Fe) as a carrier loaded with Patchouli alcohol (PA) to form the complex MIL-101(Fe)-PA. and to investigate the inhibitory activity of MIL-101(Fe)-PA against S. aureus and E. coli . Methods According to the literature,we prepared MIL-101(Fe)-PA by solvent method. Characterization of MIL-101(Fe)-PA was carried out using scanning electron microscopy(SEM), Fourier transform infrared(FT-IR) spectroscopy,X-ray diffractometer (XRD) and Brunauer-Emmett-Teller (BET) adsorption analysis. In the bacteriostatic experiments,its bacteriostatic effect was investigated by Minimal inhibitory concentration (MIC) experiments, cell proliferation,and growth curves of bacteria. Then its cytotoxicity was explored by cytotoxicity experiments. Results The characterization results indicated that we successfully prepared the complex MIL-101(Fe)-PA,which showed significant bacteriostatic effects against S. aureus and E. coli at 2 mg/mL. The inhibitory effect was stronger than that of MIL-101(Fe) as well as PA. Conclusion It shows that MIL-101(Fe)-PA has excellent inhibitory effect on S. aureus and E. coli.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Li Long,Xuechun Wang,Heyun Fu,Xiaolei Qu,Shourong Zheng,Zhaoyi Xu
Iron-based materials are effective for the reductive removal of the disinfection byproduct bromate in water, while the construction of highly stable and active Fe-based materials with wide pH adaptability remains greatly challenging. In this study, highly dispersed iron phosphide-decorated porous carbon (Fe2P(x)@P(z)NC-y) was prepared via the thermal hydrolysis of Fe@ZIF-8, followed by phosphorus doping (P-doping) and pyrolysis. The reduction performances of Fe2P(x)@P(z)NC-y for bromate reduction were evaluated. Characterization results showed that the Fe, P, and N elements were homogeneously distributed in the carbonaceous matrix. P-doping regulated the coordination environment of Fe atoms and enhanced the conductivity, porosity, and wettability of the carbonaceous matrix. As a result, Fe2P(x)@P(1.0)NC-950 exhibited enhanced reactivity and stability with an intrinsic reduction kinetic constant (kint) 1.53–1.85 times higher than Fe(x)@NC-950 without P-doping. Furthermore, Fe2P(0.125)@P(1.0)NC-950 displayed superior reduction efficiency and prominent stability with very low Fe leaching (4.53–22.98 μg L–1) in a wide pH range of 4.0–10.0. The used Fe2P(0.125)@P(1.0)NC-950 could be regenerated by phosphating, and the regenerated Fe2P(0.125)@P(1.0)NC-950 maintained 85% of its primary reduction activity after five reuse cycles. The study clearly demonstrates that Fe2P-decorated porous carbon can be applied as a robust and stable Fe-based material in aqueous bromate reduction.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Penghui Wang,Jiongming You,Guang Liu,Qiming Wang,Linjie Zhang,Xinwu Lu,Jinbao Qin,Zhihui Dong,Bingcheng Yi,Qun Huang
Biomaterial-assisted therapeutic strategies enable precise modulation to direct endogenous cellular responses and harness regenerative capabilities for nerve repair. However, achieving effective cellular engagement during nerve remodeling remains challenging. Herein, a novel composite nerve guidance conduit (NGC), the GelMA/PLys@PDA-Fe@PLCL conduit is developed by combining aligned poly( l -lactide-co-caprolactone) (PLCL) nanofibers modified with polydopamine (PDA), ferrous iron (Fe 3 ⁺), and polylysine (PLys) with aligned methacrylate-anhydride gelatin (GelMA) hydrogel nanofibers. PDA films exhibit strong adhesion and metal coordination properties, allowing Fe 3 ⁺ irons to chelate with phenolic hydroxyl groups of dopamine derivatives, forming a metal-phenolic network on PLCL. PLys molecules are then grafted onto PDA-Fe 3 ⁺ coating via Schiff base and Michael addition reactions. This multifunctional coating enhances surface roughness and zeta potential of PLCL nanofibers, imparts superhydrophilicity with anisotropic wetting behavior, and maintains wet tensile properties of substrates. In vitro studies show that the PLys@PDA-Fe coating significantly promotes aligned distribution of Schwann cells, improves cell adhesion and differentiation, and demonstrates notable antioxidant and anti-inflammatory properties. When implanted into nerve defects in rats, the multifunctional coating conduit combined with aligned GelMA hydrogel effectively accelerates axonal regeneration, remyelination, and angiogenesis, leading to enhanced motor function recovery. Overall, the GelMA/PLys@PDA-Fe@PLCL conduit presents a promising strategy for advancing peripheral nerve repair.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROSCOPY LETTERS
·
2025
·
IF 1.6
Ju Wei,Bingyu Luo,Jiao Fu,Shunli Zhou,E. Li,Xiaodong Su,Xiaotong Gao,Zhenfu Jia,Xiaojiang Li
To overcome the interference caused by the inner filter effect, this study optimally selected red fluorescence carbon dots as the signal source and constructed a novel dual-mode Ag@Red-CDs nanoprobe for the highly selective detection of Fe³+ using fluorescence and colorimetry. This probe is based on a unique reaction between Fe3+ and silver nanoparticles (AgNPs) that weakens the static quenching effect of AgNPs on R-CDs; at the same time, the depletion of AgNPs induces a change in the absorbance of the system. Under optimal conditions, the probe exhibited a linear fluorescence response in the Fe³+ concentration range of 0.10–25.00 μg/mL and a linear colorimetric response of 0.18–8.00 μg/mL. The detection limits for fluorescence and colorimetry were 0.31 μg/mL and 0.56 μg/mL, respectively. In spiked real samples, the fluorescence method achieved Fe³+ recovery rates of 99.10–102.34%, while the colorimetric method showed recovery rates of 99.83–101.42%. Overall, this research significantly broadened the potential applications of R-CDs-based materials for the quantitative detection of heavy metal ions in water bodies.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Ge Song,Yang Zheng,Minghua Zhou
The application of bimetallic catalysts in heterogeneous electro-Fenton (Hetero-EF) is limited due to its poor performance over a wide pH range. In this work, the Hetero-EF/sulfite process was constructed with FeMn@C as the catalyst to improve the degradation of pollutants under neutral pH. The removal efficiency of diclofenac (DCF) (97.8%) was significantly higher than that of Hetero-EF (15.0%) at pH 7, in which the degradation rate constant k was increased by 19.75 times. The existence and transformation process of various active species ( • OH, SO 4 •- , O 2 •- , and 1 O 2 ) in the process were verified by capture experiments and electron paramagnetic resonance (EPR) test. The possible DCF degradation pathway was also proposed. The introduction of sulfite could reduce Fe 3+ and Mn 3+ , promote the Fe(II)/Fe(III) and Mn(II)/Mn(III) cycles, strengthen the generation of active species, and thus promote the degradation of pollutants. The removal efficiency was still maintained 76.6% after five cycles. The Hetero-EF/sulfite process is a simple, feasible, and efficient method to degrade pollutants, which has a broad application prospect.
✓ 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）