ACS Applied Materials & Interfaces
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2025
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IF 8.2
Li Yang,Wei-Hua Zhang,Yan Li,Yan-Li An,Ye-Ming Wu,Ning Gu,Gao-Jun Teng
Noninvasive therapies such as photodynamic therapy (PDT) and chemodynamic therapy (CDT), which rely on reactive oxygen species (ROS), are gaining attention for their low toxicity. However, single-modal treatments have individual limitations that restrict the therapeutic efficacy. Fe(III) can coordinate with the hydrophilic regions of indocyanine green (ICG) molecules to form the ICG/Fe(III) complex, making it a promising dual-modal agent for combined PDT and CDT. However, coordination with Fe(III) leads to the aggregation quenching of ICG, hindering its application in dual-modal therapy. We innovatively utilize oxygen nanobubbles, prepared solely from water and oxygen, to significantly reverse the aggregation-induced quenching of the ICG/Fe(III) complex, thereby enhancing its stability in aqueous environments. In this system, Fe(III) assembles at the nanobubble interface, coordinating with ICG’s hydrophilic regions to form the ICG/Fe(III)-NBs. The oxygen nanobubbles boost PDT efficiency by improving the ICG/Fe(III) complex stability and oxygen content, while Fe(III) achieves CDT by generating hydroxyl radicals (•OH) through the Fenton reaction. This dual-modality treatment significantly disrupts the tumor’s redox balance, induces ferroptosis, and demonstrates strong antitumor efficacy, reducing tumor volume to 34% of its initial size in mice. The strategy offers a promising and clinically viable approach to cancer treatment.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 18
·8277-8289
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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.
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AQUA-Water Infrastructure Ecosystems and Society
·
2024
·Vol. 73
·期 8
·1671-1682
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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.
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Environmental Technology & Innovation
·
2024
·
IF 6.7
Liangquan Lu,Jianhong Bi,Asfandyar Shahab,Hua Zhang,Saeed Rad,Zhenyu Wu
s This study investigates the influence of key factors on the structure of prepared MgFe-LDH and their application for the removal of methyl orange (MO). The optimal synthesis were determined through Scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and partition coefficient (PC) analysis to study the morphology, crystallinity, and physicochemical properties of the resulting materials. Under the conditions of Mg 2+ /Fe 3+ =4, pH=11, and aging temperature of 80℃, well-structured Mg 4 Fe-LDH-11–80℃ was successfully synthesized with a theoretical maximum adsorption capacity of 1688.22 mg/g for MO. The adsorption process follows the Redlich-Peterson and Avrami models, displaying a exothermic characteristic. The outstanding adsorption capability is likely attributed to the synergistic effects of electrostatic attraction, hydrogen bonding, complexation reactions, and ion exchange mechanisms. Furthermore, cost analysis and recycling experiments indicate that the prepared LDH material is cost-effective and suitable for multiple reuse cycles, making it a promising candidate for treating wastewater containing MO dyes.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiteng Yan,Xiaohan Chen,Runping Ye,Jingwen Tao,Gang Feng,Feiyang Hu,Honglin Hu,Claudia Li,Kang Hui Lim,Tao Wen,Yuan Wang,Xinhao Li,Rongbin Zhang,Sibudjing Kawi
Ammonia (NH 3 ) decomposition is a practical approach to overcome the challenges associated with hydrogen storage and transportation. The choice of catalyst and understanding the catalytic mechanism are key factors in optimizing H 2 production by NH 3 decomposition performance. In this work, a series of alkali metal-doped Fe-based catalysts were synthesized via a solvothermal method, and the formation of Fe x N active phases was systematically investigated. The Fe-based catalysts were pretreated under different atmospheres (H 2 , NH 3 , and N 2 ), followed by comprehensive characterization using BET, XRD, SEM, NH 3 -TPD, XPS, and other techniques. The optimized catalytic activity for NH 3 decomposition was attributed to the formation of Fe x N active phases, and the formation pathway of Fe x N active phases and their catalytic promotion mechanism were further elucidated through XRD, NH 3 -TPD-MS, and XPS analyses. Significantly, catalysts treated with pure NH 3 exhibited an increase in the electron density of Fe species and a decrease in the apparent activation energy. The incorporation of alkali metal doping further amplified this effect, ultimately leading to enhanced hydrogen production performance from NH 3 decomposition. This work underscores the critical function of the Fe x N active phase in facilitating efficient NH 3 decomposition for hydrogen generation, offering invaluable insights into the development of sophisticated alkali metal-doped Fe-based catalysts.
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AICHE JOURNAL
·
2024
·
IF 3.5
Bin Zhang,Chen Yang,Yunjiao Jia,Guohui Nie,Guidong Yang
Nitrate reduction toward ammonia is pivotal in energy and environmental domains but faces challenges in achieving simultaneous high selectivity and activity. Manipulating interactions between intermediates and metal species is deemed effective for catalytic enhancement. In this study, a uniformly configured Fe 1 -N 4 single-atom catalyst with four-coordination was synthesized. Subsequent deposition of thiol-poisoned Pd nanoclusters provided a platform to investigate the neighboring effect of Pd nanoclusters, excluding activity influences from Pd catalysts. Through this neighbor engineering, the Fe 3d electron spin configuration shifted from low spin to medium spin (MS). Experimental and theoretical analyses affirmed that MS Fe species optimized nitrate reduction by enhancing the *NO desorption process. This spin-modulated Fe single-atom catalyst demonstrated superior activity (392.16 mmol −1 g cat −1 h −1 , ~40 mol −1 g Fe −1 h −1 ) and a Faraday efficiency of 98.6% at −0.5 V vs. RHE, surpassing reported values. This study presents a promising strategy for nitrogen-chemistry transition metal catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenhan Zhao,Yingjie Li,Zhiwei Chu,Duo Xu,Kuihua Han,Zirui He
Catalytic methane decomposition (CMD) process has garnered significant attention for CO 2 -free hydrogen production. Fe catalyst has been widely investigated due to its low-cost and environmentally friendly features, but is prone to rapid deactivation due to elevated temperatures and coke deposition. To address these limitations, we synthesized a series of spinel-supported Fe catalysts with varying Fe/Mg/Al ratios via the sol–gel method. These catalysts were evaluated in a fixed-bed reactor, revealing that CMD performance depends significantly on Fe positioning within the spinel lattice in the as-prepared catalysts. Methane conversion was optimal and stable when Fe occupied octahedral sites, achieving 86.7 % CH 4 conversion and 92.9 % H 2 concentration in the outlet gas at 850 °C and 2 L g cat −1 h −1 . The mesoporous spinel structure enhances high-temperature stability and improves coke tolerance, which also contributed to additional layers of multi-walled carbon nanotubes. Density functional theory (DFT) calculations further identified the spinel-supported Fe catalysts as top performers. The energy barriers for the CMD process on Fe/MgAl 2 O 4 (1 1 1) and Fe/MgAl 2 O 4 (1 0 0) were lower than those on Fe(1 1 0). The difference charge density and Bader charge results of CH adsorption and dissociation on the structures, which was the rate-limiting step, demonstrated that the spinel support facilitated the efficient transportation and placement of electrons to the Fe cluster, thereby promoting C–H bond breaking. These findings offer novel insights into the design of cost-effective CMD catalysts with stable catalytic performance and high coke tolerance.
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DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 8
·3467-3477
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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.
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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.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jinbu Su,Chenyi Shi,Chenzhuo Gong,Yuyi Xu,Yunong Xie,Xuli Lin,Xinyu Dong,Weixin Du,Yuchang Qing,Fa Luo
Semiconductor oxides are ideal candidates for future electromagnetic wave absorption and thermal management due to their hole-conducting properties. However, in practical applications, due to its limited conductivity, its development and application in the field of electromagnetic wave absorption and thermal management are greatly limited. The CuAl 1-x Fe x O 2 ceramics were synthesized using the high-temperature solid-phase method to study their microwave absorption and infrared emissivity characteristics. The introduction of Fe significantly improves the electromagnetic wave absorption and emissivity characteristics of CuAlO 2 ceramics. The effects of Fe doping on the dielectric constant, permeability, microstructure, and surface morphology of the composite were systematically analyzed. The results show that Fe doping leads to lattice distortion and the introduction of defects, which effectively improves the conductivity and polarization loss of the material, thus enhancing the dielectric loss and magnetic loss mechanisms of the material and obtaining excellent microwave absorption performance. The results show that when the doping amount of Fe is 3 %, the minimum reflection loss RLmin can reach −50.41 dB, and the effective absorption bandwidth EAB is 4.2 GHz. When the doping amount of Fe is 9 %, the infrared emissivity reaches a peak of 0.936. The porous structure further enhances the absorption and radiation properties of CuAl 1-x Fe x O 2 ceramics. It is further indicated that CuAl 1-x Fe x O 2 ceramics have great application potential in electromagnetic wave absorption and thermal management.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yimin Gong,Hui Zhang,Mingzhu Lu,Jiayu Sun,Yu Jia,Yannan Yang,Xiaofeng Liu,Bo Yin,Yaming Zhou,Yun Ling
Studies on the function-integrated nanocomposites with well-tuned morphologies have received considerable interest. Here, we reported the preparation of mesoporous carbon nanobowl integrated with stoichiometric γ-Fe 2 O 3 and GdPO 4 nanoparticles (Fe-Gd/MCN-B) for morphological advantage exploration. Followed by (i) emulsion-induced interface anisotropic assembly of polydopamine, (ii) solvent evaporation-induced sorption of Wells-Dawson-like heterometallic cluster of {Fe 6 Gd 6 P 6 } and (iii) temperature-programmed carbonization, Fe-Gd/MCN-B with the size around 200 nm was isolated. Our in-vitro studies revealed that Fe-Gd/MCN-B showed a 63.0 % amplified photoacoustic (PA) signal intensity as compared with its nanospherical analogue of Fe-Gd/MCN-S owing to the enhanced light harvesting and photothermal conversion on the interface of its nanobowl morphology. Furthermore, the combined magnetic resonance (MR) imagining, drug delivery and photothermal treatment efficacy in Fe-Gd/MCN-B were also validated in-vitro. These results demonstrated that the delicate design of the morphology of function-integrated nanocomposites is an available way for enhanced imaging performance.
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JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Ting He,Yuwei Lu,Shihao Han,Jingbin Hu,Pan Gao,Feng Xiao,Shaoxia Yang
Transition metal single atom catalysts (SACs) for boosting peroxymonosulfate (PMS) activation involving complex catalytic mechanism and multiple reaction pathways have received much attention, but regulating the reaction pathway of SACs is still an important challenge in the PMS-mediated Fenton-like reaction. Herein, a boron-doped Fe SAC with FeN 3 B configurations (Fe—BNC) was synthesized and selectively generated a non-radical pathway, in which the high-valent iron-oxo species (Fe IV O) were determined as the main reactive oxygen species (ROS) by PMS activation. The Fe-BNC/PMS system not only exhibited remarkable reaction kinetic constant (0.949 min −1 ) and turnover frequency (9.49 L min −1 g −1 ) for the phenol degradation, but also showed excellent selectivity to phenols with strong electron-donating ability. Mechanism exploration based on theoretical calculations revealed that high activity of Fe-BNC originated from the reinforced adsorption energy and enhanced overlap between Fe 3d and O 2p orbits, which facilitated to strengthen the Fe-O bonding and accelerate the electron transfer, thus modulating the PMS activation via a non-radical pathway. Successful extendibility of Fe-BNC in treatment of the real water and coking wastewater demonstrates its application potential. This work elucidates the mechanism of selectively generating a non-radical pathway over B-doped Fe-based SAC, and provides a rational strategy for preparing SACs alone with a non-radical pathway.
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