Energy Storage Materials
·
2024
·
IF 18.9
Jing Peng,Bihua Hu,Zhitong Li,Xiongwei Zhong,Junwei Shi,Shuyu Cui,Xingzhu Wang,Baomin Xu
Dual-metal single-atom catalysts with heteronuclear active sites exhibit superior oxygen catalysis performance than their single-atom counterparts, facilitating the practical applications in advanced electrochemical energy devices. Herein, a Fe-Cu dual-metal single-atom catalyst with Fe-N 6 and Cu-N 1 S 2 coordination environment (FeCu-DSAs/NSC) is reported. Due to the synergism of bimetallic active sites and asymmetric heteroatom coordination, the resultant FeCu-DSAs/NSC displays better bifunctional catalytic performance (a small potential gap between the E η10 and E 1/2 , ΔE=0.647 V) when compared with the counterparts (Pt/C+IrO 2 and Cu-ISAs/NSC), as well as surpassing most of bifunctional metal atom-based catalysts reported to date. As expected, FeCu-DSAs/NSC based rechargeable zinc-air battery shows remarkable superiority than commercial Pt/C+IrO 2 benchmark, resulting in a high peak power density (230.66 mW cm −2 ), open-circuit voltage (1.464 V) and long-term cycling stability (up to 350 h at 10 mA cm −2 ).
研究领域:
电化学
·
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 80
·50829-50837
·
IF 3.108
Juntao Tang,Jianlong Wang
A MIL-100(Fe)/graphene oxide (GO) composite was prepared by a one-step hydrothermal method and utilized as a heterogeneous Fenton-like catalyst for methyl orange (MO) degradation. The obtained catalyst was characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), nitrogen adsorption–desorption isotherms, thermogravimetric (TG) analysis, X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). The effects of H2O2 dosage, initial pH and catalyst dosage on the degradation of MO were investigated. The MIL-100(Fe)/GO presented high catalytic activity for the degradation of MO, achieving almost complete decomposition of MO after 240 min with reaction conditions of 8 mM H2O2, pH of 3.0 and 0.5 g L−1 catalyst. Kinetics analysis showed that MO removal followed a pseudo-first-order kinetic model. The catalyst showed stable catalytic activity and reusability after three successive runs. The possible catalytic mechanism of MIL-100(Fe)/GO was also proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yuchun Ren,Dandan Zhao,Chen Fu,Fei Zhou,Qian Wang,Yongsheng Fu,Tao Gong,Zhenglian Wu
Sustainable lithium-based energy storage and conversion systems, such as lithium-ion batteries, rely on efficient lithium extraction methods from brine sources. Traditional H 2 TiO 3 (HTO) lithium-ion sieves (LIS), though effective, face challenges in optimizing lithium adsorption efficiency and stability. Herein, we introduce a Fe-doping strategy in HTO (Fe-HTO) that artificially substitutes Ti sites, generating lattice defects and oxygen vacancies (OVs). This modification enhances lithium-ion diffusion kinetics and increases active adsorption sites, significantly improving selective lithium extraction efficiency. With Fe-HTO, the equilibrium adsorption time for lithium-ion in shale gas wastewater (SGW), with pH adjustment to 12, is reduced by 20 h compared to undoped HTO. Fe-HTO reaches an adsorption capacity of 37.20 mg/g within 4 h and retains 99.2 % of this capacity after 10 adsorption/desorption cycles at room temperature, demonstrating high structural stability. Density functional theory (DFT) calculations clarify that Fe doping lowers the diffusion energy barrier for lithium-ion, accelerating both lithium-ion diffusion and adsorption. Given this, the work illustrates the potential of heteroatom doping to boost adsorption kinetics, offering promising applications for rapid lithium extraction and similar resource recovery challenges.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL GEOLOGY
·
2024
·
IF 3.6
Kuan Cheng,Yunlu Yin,Ying Wang,Guoyong Huang,Dandan Pan,Milan Wang,Xuxin Song,Tongxu Liu,Xiaomin Li
Microbial Fe(II) oxidation is mainly mediated by the outer-membrane proteins that contain c -type cytochromes ( c- Cyts), and the widespread Fe(II)-oxidizing bacteria are usually subjected to fluctuations between oxic and anoxic conditions. However, it remains unclear how oxygen affects the redox dynamics of c- Cyts by Fe(II), particularly in the presence of organic ligands that are widely distributed in the environment. Here, the reduction of a model heme-containing c- Cyts by Fe(II) was investigated in the absence and presence of organic ligands (i.e., citrate and acetate) at pH 5.5 under anoxic and oxic conditions . The kinetic results showed that c- Cyts reduction was enhanced by citrate and acetate under anoxic conditions, and the enhancement by citrate was more pronounced than that by acetate. The speciation calculation and cyclic voltammetry results suggested that the proportions of Fe(II)-Citrate complexes were much higher than those of Fe(II)-Acetate complex, but the addition of acetate and citrate caused minor changes in redox potential of Fe(II)/Fe(III) species. Further analysis using quantum chemical computation demonstrated that the formation of Fe(II)-Heme complexes via lateral binding to the carboxyl group of c- Cyts was more stable than those via replacing the S-linked axial ligand of heme, with the recombination energy with Heme ranking as Fe(II)-Citrate < Fe(II)-Acetate < Fe(II). Therefore, the stronger complexation of Fe(II)-Citrate and its lower recombination energy with c- Cyts drive the enhanced c- Cyts reduction under anoxic conditions. By contrast, the c- Cyts reduction by Fe(II) and Fe(II)-ligand was inhibited under oxic conditions. The electron spin resonance characterization indicated that both O 2 − • and OH• radicals were produced in the system of c- Cyts with Fe(II) or Fe(II)-ligand under oxic conditions and the signals were higher with Fe(II)-ligand than those with Fe(II). These reactive oxygen species were proposed to enable a re-oxidation of the c- Cyts that was reduced by Fe(II) or Fe(II)-ligand, causing an inhibitory effect on the observed c- Cyts reduction and forming more reactive oxygen species . Our findings shed light on the important roles of Fe(II)-ligand-heme complexation and reactive oxygen species in the interaction between Fe(II) and c- Cyts, which deepen the understanding of microbial/enzymatic Fe(II) oxidation under oxic conditions at the molecular level.
研究领域:
微生物学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Nanomedicine
·
2025
·
IF 6.5
Jinlu Shang,Yongjun Chen,Fangliang Wang,Jing Yang,Yi Li,Liuxuan Yang,Xiuqiong Liu,Zhirong Zhong,Chaochi Yue,Meiling Zhou
Background Melanoma is an aggressive form of skin cancer, and single-modality treatments often fail to prevent tumor recurrence and metastasis. Combination therapy has emerged as an effective approach to improve treatment outcomes.Methods In this study, we developed a multifunctional nanoplatform, MIL@DOX@ICG, utilizing MIL-101-NH2(Fe) as a carrier to co-deliver the chemotherapeutic agent doxorubicin (DOX) and the photosensitizer indocyanine green (ICG). MIL-101-NH2(Fe) was synthesized via a hydrothermal method. Drug release was evaluated under different pH conditions, and the photothermal effect was tested under near-infrared (NIR) laser irradiation. Hydroxyl radical and reactive oxygen species generation capacities were quantified. Cellular studies using B16F10 cells assessed cytotoxicity, cellular uptake, migration inhibition, and colony formation suppression. In vivo experiments in melanoma-bearing mice evaluated antitumor efficacy and systemic safety through tumor growth inhibition, histological analyses, and toxicity assessments.Results MIL@DOX@ICG exhibited a uniform octahedral structure with a particle size of approximately 139 nm and high drug loading efficiencies for DOX (33.70%) and ICG (30.59%). The nanoplatform demonstrated pH-responsive drug release and potent photothermal effects. The generation of hydroxyl radicals via the Fenton reaction and reactive oxygen species production under NIR laser irradiation by MIL@DOX@ICG were confirmed. In vitro assessments revealed significant cytotoxicity of MIL@DOX@ICG against B16F10 cells under NIR laser irradiation, with improved efficacy in inhibiting cell proliferation and migration. In vivo studies confirmed the superior antitumor efficacy of MIL@DOX@ICG + NIR treatment, synergistically harnessing chemotherapy, photothermal therapy, photodynamic therapy, and chemodynamic therapy effects while maintaining excellent biocompatibility.Conclusion Our findings underscore the potential of MIL-101-NH2(Fe) nanoparticles as a versatile and effective platform for synergistic melanoma therapy, offering a promising strategy for overcoming the limitations of conventional treatment modalities.
研究领域:
肿瘤学
·
纳米医学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Jie Cao,Jin Huang,Huaping Dong,Jianfa Li,Jianxin Shou,Yimin Li
Surfactants are easily accumulated in groundwater, sediment, and aquifers, due to their excessive use in household, industrial, and agricultural processes. These residual surfactants are expected to influence the transformation and fate of organic contaminants by Fe(II) sorbed on iron oxides in anaerobic environments. Here, we investigated the effects of various surfactants including nonionic TX-100, anionic SDBS and bio-surfactant saponin on the removal of nitrobenzene (NB) by Fe(II) sorbed on goethite (goethite/Fe(II)) through batch experiments. We also elucidated the mechanism behind the effects by XPS, XRD , and determination of the amounts of sorbed Fe(II) on goethite. The results showed that the presence of TX-100 improved NB removal from 77.2% in the absence of surfactant, to 93.8% within 6 h, and improved the removal rate by about 1.3 times. In contrast, the presence of SDBS decreased the removal efficiency to 45.5%, and the presence of saponin nearly inhibited the removal of NB completely. The removed NB was finally nearly reduced to aniline in the absence or presence of surfactants, except in the case of saponin. The amounts of sorbed Fe(II) listed in the sequence as goethite/Fe(II)+TX-100 > goethite/Fe(II) > goethite/Fe(II)+SDBS > goethite/Fe(II)+saponin, and this order negatively correlated with that in the redox potential of these systems. These results confirmed that the presence of surfactants influenced the sorption of Fe(II) on goethite and changed the reactivity of goethite/Fe(II) for NB removal. This finding will promote a clear understanding of the impact of coexisting surfactants on the transformation and fate of organic contaminants in real anaerobic environments.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environments
·
2024
·Vol. 11
·期 7
·136
·
IF 3.5
Junhao Zheng,Mei Jiang,Qingzhu Li,Weichun Yang
Fe/Mn (hydr)oxides are metallic compounds that exhibit significant redox activity in environmental media and play a pivotal role in geochemical processes, thereby influencing the fate of metals in porous media. The morphology of Fe/Mn (hydr)oxides in natural environments and their interactions with trace metals are significantly influenced by the presence of natural organic matter (NOM). However, there is limited understanding regarding the formation, transport, and stability of Fe/Mn (hydr)oxides in the environment. The present study employed humic acid (HA) as a representative NOM material to investigate the positive influence of HA on the formation of Fe/Mn colloids. However, there remains limited comprehension regarding the formation, transport, and stability of Fe/Mn (hydr)oxides in the natural environment. In this study, we investigated the positive effect of natural organic matter (NOM) on the formation of Fe/Mn colloids using humic acid (HA) as a representative NOM material. We comprehensively characterized the chemical and physical properties of HA–Fe/Mn colloids formed under various environmentally relevant conditions and quantitatively analyzed their subsequent aggregation and stability behaviors. The findings suggest that the molar ratios of C to Fe/Mn (hydr)oxide play a pivotal role in influencing the properties of HA–Fe/Mn colloids. The formation and stability of HA–Fe/Mn colloids exhibit an upward trend with increasing initial molar ratios of C to Fe/Mn. Redox and metal–carboxylic acid complexation reactions between HA and hydrated iron/manganese oxides play a pivotal role in forming colloidal HA–Fe/Mn complexes. Subsequent investigations simulating porous media environments have demonstrated that the colloidal structure resulting from the interaction between HA and Fe/Mn facilitates their migration within surrounding porous media while also enhancing their retention in the surface layers of these media. This study offers novel insights into the formation and stabilization mechanisms of HA–Fe/Mn colloids, which are pivotal for comprehending the behavior of Fe/Mn colloids and the involvement of Fe/Mn (hydr)oxides in geochemical cycling processes within porous media.
研究领域:
环境科学
·
地球化学
·
胶体化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 40
·6010-6017
·
IF 3.382
Shuai Fang,Hongan Ma,Zhanke Wang,Zhiqiang Yang,Zheng-hao Cai,Luyao Ding,Xinyuan Miao,Liangchao Chen,XiaoPeng Jia
FeS is the main sulfur-containing compound in natural diamond inclusions. The research on FeS-doped diamond crystals plays an extremely important role in exploring the growth environment of natural diamond and the chemical composition of the earth. In our work, the characteristics of FeS doped diamond crystals were studied by using a China-type large volume cubic high-pressure apparatus with an iron–nickel alloy as a catalyst at 6.0 GPa and 1300–1350 °C. The crystals were characterized by OM, SEM, XPS, FTIR and Raman. Scanning electron microscopy of the crystal shows that the {100} plane of the crystal is rougher than {111}, which is related to the number of dangling bonds on different crystal faces of the crystal. The residue on the surface of the crystal was detected by mapping, and the test result showed that it was a sulfur iron and a sulfur nickel compound. FeS will decompose in the synthesis system, and the decomposition products are Fe and S2.The XPS spectrum of the crystal shows that S was successfully incorporated into the diamond lattice by forming C–S–O and C–S–SO2–C bonds, and the peak intensity was strong. The infrared spectrum shows that the N content in the crystal gradually increases as the doping ratio increases. Raman spectroscopy analysis shows that the S-doped Ib-type diamond single crystal has a high-quality sp3 structure, and the full width at half maximum (FWHM) of the crystal gradually broadens as the doping ratio increases.
研究领域:
地球化学
·
材料科学
·
高压合成
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2020
·
IF 0
Shuai Feng,Yan An,Zong Xiang Wang,Kai Sun,Run Hua Fan
In this work, the insulating SiO2 was coated successfully on the surface of reduced iron particles by a sol-gel method to decrease the core loss at low frequency. The scanning electron microscope images and elements analysis confirm that the surface of iron powders particles were covered by a thin insulating layer in the form of uniform core-shell structure. The samples were annealed at 400 °C in N2 atmosphere to obtain better magnetic properties. The annealed SMCs with 10 mL/h dropping rate of TEOS have optimum magnetic properties with low core loss Ps of 280.89 W/kg and high saturation magnetic flux density Bs of 1.038 T at 1000 Hz.
研究领域:
材料科学
·
磁学
✓ 已验证
DOI
RENEWABLE ENERGY
·
2025
·
IF 9.1
Hongming Liu,Junhao Cui,Zhiyang Zhao,Yongqi Ren,Bailong Chen,Longzhi Li
The traditional utilization of lignin mainly relies on direct combustion, which leads to low energy efficiency and environmental pollution, becoming a key bottleneck restricting the efficient utilization of all components of lignocellulose. This paper introduced a new strategy of microwave-assisted lignin hydrogenolysis over bifunctional catalyst Fe-Co/AC to achieve high-value conversion of lignin. This article firstly investigated the hydrogenolysis characteristics and product distribution patterns in the presence of Fe-Co/AC through catalyst characterization and adsorption calculation, as well as hydrogenolysis experiments. The results showed that the formation of Fe-Co alloy in the catalyst resulted in highly catalytic activity and selectivity for the hydrogenolysis process. Next, the intrinsic effects of solvent hydrogen donors and microwaves on lignin hydrogenolysis were discussed, through comparative experiments of hydrogenolysis in absence of catalyst and microwave-assisted pyrolysis. Lastly, attention was paid to calculate the adsorption characteristics and bond length changes of different substrates under metal components in order to reveal the mechanism of Fe-Co for synergistic catalyzing lignin hydrogenolysis, and to propose a potential pathway for lignin directed conversion into phenol. The findings provide a new approach for efficient bond breaking and intermediates hydrogenation of solid wastes such as lignin and plastics to obtain high value-added products.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Lijun Guo,Feifei Li,Jianxin Liu,Rui Li,Zhuobin Yu,Qing Xi,Lulu Zhang,Yaru Li,Caimei Fan
Morphology regulation is a simple way to improve photocatalytic activity. In this work, a MIL-101(Fe) photocatalyst with cracked spindle morphology has been successfully prepared by EG pre-coordination solvothermal method . The cracking degree of MIL-101(Fe) can be regulated by adjusting pre-coordination time. The MIL-101(Fe) with the optimal uniform crack displays a best NH 3 evolution rate of 592 μmol h −1 g −1 under the visible light irradiation . Cracked MIL-101(Fe) is similar to a semi-exposed model, which can increase the number of reactive sites, improve refraction and reflection of light, and ultimately enhance the photocatalytic nitrogen fixation activity. This work developed a convenient strategy to improve the photocatalytic activity of nitrogen reduction by controlling morphology.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Min Wang,Shu Zhang,Qi Li,Yuanpeng Li,Enzhe Duan,Caimei Wen,Shujun Yu,Xiangxue Wang
Extracting uranium from seawater not only reduces radioactive contamination in seawater but also provides a source of uranium energy. However, due to the low concentration of uranium in seawater and the high salinity of seawater, extraction of uranium from seawater is challenging. In this work, we demonstrated a simple strategy to synthesize Fe-doped MXene (Fe@Ti 3 C 2 T x ) via a hydrothermal method and applied for uranium enrichment in seawater. The Fe@Ti 3 C 2 T x exhibited excellent adsorption performance in high salinity environments. The removal capacity of Fe@Ti 3 C 2 T x was determined to be 526.6 mg/g for UO 2 (CO 3 ) 2 2− at 328 K with quick reaction equilibrium (∼ 30 min). Kinetic and thermodynamic analyses of UO 2 (CO 3 ) 2 2− elimination process on Fe@Ti 3 C 2 T x surface revealed it to be a spontaneous and endothermic single-phase elimination process. FT-IR and XPS analyses further indicated that the removal mechanism of UO 2 (CO 3 ) 2 2− by Fe@Ti 3 C 2 T x was surface complexation. Our study suggests that Fe@Ti 3 C 2 T x can provide a feasible solution for uranium enrichment in seawater.
研究领域:
材料科学
·
环境科学
✓ 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）