Journal of Materials Chemistry A
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2026
·
IF 9.2
Wenlong Yang,Zhenghui Ma,Guoli Fan,Xiaoyan Pu,Feng Li
Photocatalytic CO2 reduction to produce high value-added hydrocarbons has attracted significant attention, yet its overall efficiency remains unsatisfactory. In this work, a micro-liquid film reactor featuring enhanced mixing efficiency was utilized to realize the doping of single Fe atoms into the lattice of TiO2, enabling the generation of abundant atomically dispersed Feδ+ -Ov-Ti structures (Ov: oxygen vacancy). The results showed that compared to pristine TiO2, the optimized Fe-TiO2 photocatalyst bearing a 4 wt.% Fe content exhibited 15.2 times higher activity, with a significant shift in the predominant product from CO to CH4, as well as an impressively high CH4 formation rate of 29.2 μmol•g-1•h-1 , surpassing those over most of the state-of-the-art TiO2-based photocatalysts previously reported. It was revealed that the incorporation of single-atom Fe could reduce the bandgap of TiO2 matrix and surface atomically dispersed Feδ+ -Ov structures could improve the separation efficiency of photogenerated charge carriers and facilitated the adsorption and activation of CO2 and the formation and stabilization of key *CO reaction intermediate, thereby accelerating photocatalytic CO2 reduction to produce CH4. The present work affords a simple and efficient strategy for designing single-atom Fe-regulated TiO2-based photocatalysts for a synergistic enhancement of CO2 photoreduction activity and CH4 selectivity.
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JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Xingchen Pan,WenKai Li,Chen Wang,Zhiyong Xie
Owing to the high theoretical energy density, lithium–sulfur batteries (LSBs) have been regarded as a highly competitive technology for next-generation energy storage systems. However, the commercial deployment of LSBs is affected by the diffusional loss of lithium polysulfides (LiPSs) and the inherently slow electrochemical conversion rates. Dual atom catalysts (DACs) have emerged as one of the most promising catalytic materials for LSB by expediting the kinetic conversion of LiPSs and facilitate the formation/decomposition of Li 2 S during the battery cycling process, thereby reducing the migration of LiPSs. In this study, we developed Fe-Ni DACs supported on nitrogen-doped few-layer graphene (FeNi-N-G) as a host for sulfur cathode. Both theoretical calculations and experimental results demonstrate that this few-layer graphene structure provides high conductivity and a porous framework, which significantly improves electron and lithium-ion transport. The dual-functional Fe-Ni–N site serve as strong anchoring centers for polysulfides while simultaneously providing active sites to improve the Li–S redox kinetics. Consequently, the cathode achieves a high initial capacity of 1164.6 mAh g −1 and maintains a capacity retention of 83.1% after 100 cycles at 0.2 C. Such performance underscores its exceptional cycling durability, particularly under high sulfur loading conditions.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 22
·1771
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IF 3.2
Zhang Enlei,Xu Zhiyi,Song Xiaowen,Wang Shuyuan,Zhang Bengui,Xie Yingpeng,Wang Guosheng
Hydrogen peroxide (H 2 O 2 ) detection is of great significance in environmental monitoring, food safety, and clinical diagnosis. Copper doping into α-FeOOH nanorods significantly enhanced the sensitivity and stability for electrochemical detection of H 2 O 2 . The structure and surface morphology of the products were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The electrochemical properties of CuFe 2 O 4 /α-FeOOH were studied by cyclic voltammetry and amperometry. The results showed that the composition and morphology of the as-prepared products were dependent on the Cu doping level. When the Cu doping level was up to 10 mol%, a spinel copper ferrite (CuFe 2 O 4 ) phase was formed in the product, accompanied by a morphological evolution into nanoparticles. The CuFe 2 O 4 /α-FeOOH/FTO (Fluorine-doped tin oxide) electrode exhibited excellent performance to detection of H 2 O 2 with high sensitivity (125.86 μA·mM −1 ·cm −2 ) and a low detection limit (0.56 μM, S/N = 3). Finally, the possible mechanism of the CuFe 2 O 4 /α-FeOOH catalysts for H 2 O 2 detection was analyzed and discussed.
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Water
·
2026
·Vol. 18
·期 16
·1928
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IF 3.5
Yixin Pan,Yajun Chen,Wenshuo Zhang,Xiaofan Lv
A nitrogen-doped carbon-confined cobalt–iron bimetallic catalyst (CFNC) was fabricated through high-temperature pyrolysis of a ZIF-67-modified CoFe2O4precursor and employed as a heterogeneous activator for peroxymonosulfate (PMS)-mediated Rhodamine B (RhB) degradation. The physicochemical properties of the as-prepared catalyst were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) analysis. These analyses demonstrated that Co–Fe bimetallic species were successfully embedded within the nitrogen-doped carbon framework, forming a confined carbon-supported catalytic structure. Under optimized conditions (CFNC dosage of 20 mg L−1, PMS concentration of 150 mg L−1, and initial pH of 7), the CFNC/PMS system achieved 99.45% RhB removal within 10 min. Moreover, the catalyst retained 78.91% degradation efficiency after five successive cycles, indicating its satisfactory reusability and structural stability. Mechanistic investigations based on radical scavenging experiments and electron paramagnetic resonance (EPR) analysis revealed that PMS activation over CFNC involved the coexistence of radical and non-radical oxidation pathways, in which singlet oxygen (1O2) played a predominant role. The defect-rich nitrogen-doped carbon matrix facilitated PMS adsorption and activation, promoting the selective formation of1O2, while the confined Co–Fe bimetallic sites contributed to efficient electron transfer during the catalytic process. The synergistic coupling between the Co–Fe active centers and conductive carbon framework accounted for the enhanced catalytic performance, suppressed metal leaching, and long-term stability of CFNC. This work presents a promising approach for constructing robust bimetallic carbon-based catalysts and advances the application of PMS-driven advanced oxidation processes for wastewater remediation.
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BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Jin Ge,Zhaoshuang Li,Xu Xu,He Liu,Guoen Yang,Chuntao Kuang,Min Zhang,Zhenfei Yang,Yuanfeng Wei,Yiqiang Wu
Fe/La@MBC adsorbs PSNPs with a Langmuir capacity of 555 mg/g. • Fe/La@MBC maintains >98% removal in real-water matrices. • Magnetic recovery and pyrolysis regeneration retain 85% removal after 5 cycles. • DFT indicates O-containing groups strengthen Fe/La@MBC–PSNP interfacial binding. • Flow-through columns maintain >70% removal after 5 regeneration cycles. Nanoplastics (NPs) are emerging aquatic contaminants with high mobility, colloidal stability, and potential biological accessibility. However, many existing treatment methods mainly transfer captured NPs into a secondary solid phase, leaving NP-bearing residues that still require further handling. To address this issue, Fe-La-modified magnetic almond-shell biochar was prepared as a regenerable adsorbent that integrates nanoplastics capture, magnetic recovery, and pyrolysis-assisted regeneration. Among the prepared materials, Fe/La@MBC-1:1 exhibited the best overall adsorption performance toward polystyrene nanoplastics (PSNPs), with a Langmuir maximum capacity of 555 mg/g. Stable removal behavior was maintained under varying water chemistry conditions and in real-water matrices. Additional tests further showed effective removal at lower PSNPs concentrations and across different particle sizes, surface functionalities, and selected nanoplastic types. The adsorption behavior was associated with enhanced interfacial interactions between Fe/La@MBC-1:1 and nanoplastics, including electrostatic attraction and van der Waals forces. After five adsorption-pyrolysis regeneration cycles, the removal efficiency remained at 85% in batch adsorption and above 70% after the fifth regeneration cycle in flow-through column operation. These results indicate that Fe/La@MBC-1:1 provides a feasible biochar-based route for integrated nanoplastics capture, magnetic recovery, and pyrolysis-assisted regeneration. Download: Download high-res image (145KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Chong Zhang,Xinbao Li,Lei Chen,Gonggang Sun,Qi Wang
Liquid hydrogen is attractive for large-scale hydrogen storage and long-distance transport because of its high volumetric energy density. However, exothermic ortho-para hydrogen conversion at cryogenic temperature causes boil-off loss and requires efficient catalysts. Iron-based catalysts are widely used, but their practical application is limited by poor stability under water, oxygen, and impurity attack. Herein, Fe@SiO 2 core-shell catalysts with tunable shell thicknesses were prepared by precipitation combined with hydrolytic coating and evaluated at 77 K. An amorphous SiO 2 shell was uniformly formed on the iron-based particles without destroying the active phase. The optimized catalyst achieved an outlet para-H 2 content of 47.5% and remained stable over 120 h. The improved catalytic performance is attributed to the SiO 2 coating, which enhances the structural stability of the iron-based particles while retaining accessible mesoporous transport pathways. These pathways facilitate H 2 transport to the iron-based active phase while reducing its exposure to the external environment.
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Journal of Energy Storage
·
2026
·
IF 10.7
Qi Cheng,Tenghui Qiu,Jiashun Liu,Zixuan He,Hua Tian,Lingfeng Shi,Gequn Shu
Photo-assisted lithium‑carbon dioxide battery (Li-CO 2 ) can utilize the charge carriers generated at the cathode by light to reduce the kinetic barriers of carbon dioxide reduction and lithium carbonate decomposition reactions. However, rapid recombination of photogenerated carriers and sluggish interfacial charge transfer still lead to high overpotentials and limited cycle life in photo-assisted Li-CO 2 batteries. Therefore, it is crucial to design highly efficient photocatalysts that can suppress carrier recombination and accelerate interfacial charge transfer for rational optimization. Herein, we adopted the design strategy of metal ion doping and synthesized a Fe-doped ZnS (Zn 1-x Fe x S, denoted as ZFS-x) photocathode by the hydrothermal synthesis method. The doping of iron ions effectively regulates the electronic structure of ZnS, inhibits the recombination of photogenerated carriers, and accelerates the interfacial charge transfer kinetics. The photo-assisted ZFS-x cathode delivers a markedly prolonged cycling lifetime of up to 300 cycles (600 h) at a current density of 0.01 mA cm −2 , substantially exceeding that achieved under dark conditions (144 h). Furthermore, the single-cycle overpotential is significantly reduced from 2.27 V in the dark to 0.49 V under illumination. Morphology studies confirm that appropriate Fe-ion doping significantly enhances the uniformity of the discharge products, which are present as uniformly dispersed nanoscale particles rather than densely packed plate-like or aggregated structures. Moreover, their highly reversible decomposition during charging effectively mitigates pore blockage and interfacial passivation. These results indicate that the incorporation of iron can improve charge separation and regulate the formation and decomposition of Li 2 CO 3 , thereby effectively modulating the ZnS photocathode and ultimately enabling the development of photo-assisted Li-CO 2 batteries with low overpotential and long cycle life.
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RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2026
·Vol. 96
·期 9
·283
·
IF 1
Qing Yan,Chai Chunxiao,Li Kuan,Jiang Ye,Li Jingjing
MOF-based nanozymes are promising for colorimetric biosensing but are often limited by rigid coordination environments and poor active-site accessibility. Here, a 2-methylimidazole-regulated MIL-88B(Fe) nanozyme (2-MIM@MIL-88B) was prepared via an in situ coordination-competition strategy. Compared with pristine MIL-88B(Fe), 2-MIM@MIL-88B retained a spindle-like morphology but showed reduced crystallinity, nitrogen-containing species, pore-texture reorganization, and local Fe-site electronic modulation with increased defect-related centers. These changes correlated with enhanced peroxidase-like activity in the TMB-H 2 O 2 system, despite a reduced BET surface area. In a glucose oxidase-coupled colorimetric assay, 2-MIM@MIL-88B enabled glucose detection over 0.015–0.5 mM with a detection limit of 1.7 µM.
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Journal of Environmental Sciences
·
2026
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IF 6.5
Huiwang Dai,Yingsen Fang,Xinran Guo,Shumei Gao,Yuejin Zhang,Zeyu Li,Zhiqing Liu,Wenjun Zhou
Engineering the electronic structure of active centers located at the octahedral sites in spinel oxides has been widely recognized as an effective strategy for enhancing their performance in Fenton-like catalysis. However, the role of tetrahedral site during the catalytic process between octahedral active site and oxidant molecule remains to be unrevealed. In this study, a series of Fe-based spinel oxides with the substitution of different tetrahedral sites (AFe 2 O 4 , A = Zn, Ni, Co, Mn, Cu) were synthesized by the sol-gel method, and the critical role of tetrahedral site in the peroxymonosulfate (PMS) activation process was systematically investigated. The Fe-based spinel oxide with Co occupying the tetrahedral site (CoFe 2 O 4 ) exhibited high activity and stability in Fenton-like catalysis. Remarkably, the degradation efficiency of bisphenol A (BPA) reached 100 % within 40 min, with a corresponding kinetic rate constant of 0.107 min -1 . The density functional theory calculations reveal that the substitution at the tetrahedral site could regulate the occupation of electron filling in d orbital, and thereby lead to a modulation of the electronic structure accompanied with the shift of d-band center. Co atom at the tetrahedral site modulates the d-band center of Fe closer to the Fermi level, which optimizes the interaction between PMS molecule and Fe active center, thereby facilitating BPA degradation via a fast electron transfer process.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Muhammad Arif,Min He,N.A. Samreen,Hasi Hays,Ling Wang,Xiyuan Zhang,Bingqiang Zhang,Guotai Li,Tengbo Yu,Qihui Zhou
The increasing prevalence of antibiotic-resistant Helicobacter pylori (R- H. pylori ) poses a significant clinical challenge, contributing to persistent gastritis, peptic ulcers, and gastric cancer. Conventional antibiotic therapies are increasingly limited by resistance, incomplete eradication, and disruption of the gut microbiota. To address these challenges, we developed pH-responsive iron-doped ammonium citrate carbon dots (Fe-CDs), a nanozyme with intrinsic specificity for targeting and eradicating R- H. pylori within the acidic gastric microenvironment. Fe-CDs exhibit dual oxidase (OXD)- and peroxidase (POD)-like catalytic activities that are selectively activated under acidic conditions, driving the localized generation of reactive oxygen species (ROS) via Fenton and Fenton-like reactions involving Fe(II) and endogenous hydrogen peroxide (H₂O₂). The nanozyme shows strong binding affinity for H. pylori through ammonium (NH 4 + )-mediated interactions and specifically targets Urel, thereby inhibiting urease activity and disrupting bacterial acid resistance. This dual mechanism—acid-enhanced ROS production combined with urease suppression—confers potent bactericidal effects against R- H. pylori while preserving commensal microbiota and minimizing off-target damage. Transcriptomic analysis of infected gastric tissue revealed that Fe-CDs induce ROS-mediated stress pathways and metabolic disruption in H. pylori . In vivo studies confirmed that Fe-CDs significantly reduce bacterial load in R- H. pylori -infected mice with negligible toxicity. These findings highlight Fe-CDs as a targeted, antibiotic-free therapeutic strategy for resistant gastric infections and offer a promising alternative to conventional treatments.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2026
·
IF 2.6
Dongling Meng,Zhiyan Chen,Zhibin Chen,Junrao Cen,Chengwei Lin,Yaling Yang
Herein, a novel bimetallic (Fe,Cu/His) nanozyme with high peroxidase (POD)-like activity for colorimetric assaying of glucose was designed. Assisted by glucose oxidase (GOx), glucose could be specifically converted into H2O2 for oxidizing chromogenic substrate 3,3′,5,5′-tetramethylbenzidine (TMB) catalyzed by Fe,Cu/His to generate blue oxTMB with absorption at 654 nm. Specifically, Fe,Cu/His exhibits excellent POD-like activity due to ascorbic acid with reducing properties to ensure the formation of binary-valence metal pairs (Fe3+/Fe2+ and Cu2+/Cu+), thus enhancing electron transfer during the catalytic process. Based on the cascade reaction of GOx and the Fe,Cu/His nanozyme, a sensitive colorimetric assaying platform for glucose detection was constructed with a good linear range of 5–1000 µM and a calculated limit of detection of 1.44 µM. This proposed method was applied to assay glucose in tobacco samples sensitively and accurately.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qianru Wu,Yishuo Xu,Enming Xu,Qi Wu,Ziyu Zhang,Zhen Wang,Kezheng Chen,Maoshuai He
Porous magnesia (MgO) is widely employed as a support for anchoring metal catalysts in the synthesis of single-walled carbon nanotubes (SWNTs), where its surface properties significantly influence catalytic behavior. In this study, MgO supports with different surface basicity are prepared through calcination at different temperatures and loaded with iron (Fe) to probe the influence of support basicity on SWNT growth. Using carbon monoxide as the carbon source, all Fe catalysts supported by different MgO carriers are active for the chemical vapor deposition synthesis of SWNTs. Remarkably, the Fe catalyst supported on MgO pre-calcinated at 600 °C enables SWNT growth with a yield of 2.2% at a temperature as low as 600 °C. This enhanced low-temperature activity is attributed to the strong surface basicity of the MgO support, which promotes the adsorption and dissociation of carbon-containing molecules on Fe nanoparticle surfaces, thereby facilitating SWNT nucleation and growth at reduced temperatures. Upon increasing the growth temperature to 700 °C, SWNTs grown over all Fe/MgO catalysts exhibit a pronounced enrichment of the (6, 5) chirality, highlighting the critical role of active catalyst composition in dictating SWNT chirality distribution. This work highlights the synergistic importance of catalyst composition and support surface basicity in achieving low-temperature growth and narrow chirality distribution of SWNTs
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