Carbon Letters
·
2024
·
IF 5.5
Chen Jinghong,Xie Huan,Lin Yuyin,Tan Zhenxing,Zheng Mingchen,Yuan Yong,Zhou Lihua
Ibuprofen (IBU), a common pharmaceutical and personal care product (PPCP), is a pervasive water pollutant with adverse ecological and human health effects after transformation and accumulation. In this study, we synthesized Fe, N-doped carbon quantum dots (Fe, N-CQDs) using pig blood and FeCl 3 as a precursor via a one-step hydrothermal method. TEM, XRD, XPS, and UV–Vis were used to characterize the physical and chemical properties of Fe, N-CQDs. We investigated the feasibility of Fe, N-CQDs in activating peroxymonosulfate (PMS) for IBU degradation under visible light. The experimental results revealed that Fe in Fe, N-CQDs predominantly formed a stable complex through Fe–N and Fe-OH, with a high degree of graphitization and a sp 2 -hybridized graphitic phase conjugate structure. The Fe, N-CQDs/Light/PMS system exhibited strong activity, degrading over 87% of IBU, maintaining a wide pH range (3–10) adaptability. Notably, Fe, N-CQDs acted as visible-light catalysts, promoting Fe 3+ /Fe 2+ cycling and PMS activation, generating both free radicals (SO 4 •– , ·OH) and non-radicals ( 1 O 2 , h + ) to effectively degrade IBU. This study presents an innovative approach for the sustainable utilization of pig blood as a biomass precursor to synthesize Fe- and N-doped carbon materials. This study provides a new approach for the sustainable and value-added utilization of natural wastes and biomass precursors of Fe- and N-doped carbon materials, which can be used to treat pollutants in water while treating discarded pig blood. Graphical abstract
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MICROCHEMICAL JOURNAL
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2025
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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.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Jianguo Feng,Yifei Tan,Li Sun,Qianwei Liang,Tianzhen Jiang,Zhen Li
Traditional pesticide formulations have issues such as poor targeting, low adhesion performance, and a tendency to leach into the environment, causing pollution. In this study, a pesticide delivery platform (PRO@FeMOFs@CMC) with a dual response was designed by encapsulating prochloraz technical (PRO) within Fe-based metal–organic frameworks (FeMOFs) and using carboxymethyl cellulose (CMC) as the gatekeeper. The results showed that PRO@FeMOFs@CMC exhibited a loading capacity of 28.86 % for PRO and efficient adhesion to wheat and rice leaves. This delivery platform showed a significant increase in the release of PRO under environments similar to that produced by a pathogen infection, involving cellulase and glutathione (GSH). Importantly, compared to prochloraz suspension concentrate (PRO@SC), PRO@FeMOFs@CMC exhibited higher fungicidal efficacy against Rhizoctonia cereali and Rhizoctonia solani and its acute toxicity to zebrafish and earthworms was reduced by 3.7 times and 8.6 times, respectively. Compared to PRO@SC, the cells treated with PRO@FeMOFs@CMC had higher cell viability and a significantly reduced apoptosis rate, demonstrating greater safety. Additionally, FeMOFs@CMC showed no evident toxicity to wheat and rice. In summary, PRO@FeMOFs@CMC is an efficient and safe pesticide controlled-release system for the sustainable management of wheat and rice diseases.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Jingchuan Guo,Yan Gao,Xuankai Cao,Xing Rong,Shidan Chi,Guolan Fan,Lei Zhang,Guohong Tian,Xudong Zhao
Hydrogen energy has attracted widespread attention as a high-energy–density, sustainable and clean energy source. Hydrogen production by electrolysis of water is a simple and efficient method of hydrogen production. However, most of the currently widely used commercial catalysts are expensive precious metals and their oxides. Therefore, it is necessary to develop low-cost, efficient and stable catalysts to promote the development of the hydrogen energy industry. Metal organic framework (MOF), as a new type of porous, high surface area material, has great potential in catalysis. Bimetallic MOF materials can further improve the catalytic activity of MOF materials as electrocatalysts by adjusting metal sites. In this paper, different proportions of Fe-Co bimetallic MOF materials were synthesized by hydrothermal method, and the Fe-Co bimetallic carbon materials prepared by carbonization at high temperature were used as OER electrocatalyst, and the microstructure and electrochemical performance of the materials were analyzed and evaluated through microscopic mechanism characterization and electrochemical characterization. The test results show that Fe-Co bimetallic carbon materials have excellent electrocatalytic performance, Fe 2 Co/C and RuO 2 have the smallest high-frequency semicircles, and have the smallest internal charge transfer resistance. This indicates that Fe 2 Co/C has similar conductivity to RuO 2 . When the current density is 10 mA·cm −2 , Fe 2 Co/C has an overpotential of 335 mV, and when the current density is 50 mA·cm −2 , Fe 2 Co/C has an overpotential of 382 mV, and the oxygen evolution performance of Fe 2 Co/C is better than that of commercial precious metal catalyst RuO 2 at high current density. At the same time, its Tafel slope is only 58.8 mV·dec −1 , which is lower than that of RuO 2 catalyst, and it has a faster charge transfer rate. After CV cycles and 12 h of electrolysis by continuous chronoamperometry electrolysis, it exhibited excellent electrocatalytic stability.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Shaojun Sun,Chunyan Zhang,Mingxin Ran,Yujie Zheng,Chuanhua Li,Yu Jiang,Xuemin Yan
Developing efficient, stable, and cost-effective catalysts is crucial for hydrogen production through electrolysis of water. In this study, a comprehensive work was conducted on the electrocatalytic hydrogen and oxygen evolution performance of nickel-based phosphides doped with metallic iron. The Ni 5 P 4 /Ni 2 P/Fe 2 P catalysts with heterostructure were synthesized via a simple two-step synthetic route: (i) NaBH 4 pretreatment and in situ hydrolysis, (ii) low-temperature phosphating. It was found that iron doping not only improves the dispersibility but also increases the valence state of nickel in phosphating products. The Ni 5 P 4 /Ni 2 P/Fe 2 P-2 catalyst prepared with a molar ratio of 3 between Ni and Fe exhibits the best performance for HER and OER. In detail, only 185 and 190 mV overpotentials in acidic and alkaline electrolytes are required when the current density of hydrogen production is 10 mA cm −1 , respectively. To achieve the same current density under alkaline conditions, an overpotential of 215 mV is required for oxygen evolution, which is superior to IrO 2 . This work would enlighten the construction of more advanced bifunctional catalysts (HER and OER) via metal Fe doping.
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Catalysis Science & Technology
·
2025
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IF 4.2
ChengBo Qian,Yuyuan Yao,Hongliang Zhu
Fe-based catalysts have garnered significant attention due to their high stability, low toxicity and cost-effectiveness, while the construction of highly active heterogeneous Fe-based catalysts through a simple method is still challenging in the environmental catalysis field. Herein, employing the synergistic enhancement effect of the conductive polymer polyaniline (PANI) and co-catalyst MoS2, a highly active PANI-supported Fe-doped MoS2 catalyst (PANI-Fe@MoS2) was prepared via a facile one-step hydrothermal process. Surprisingly, PANI incorporation induced critical structural modifications, including reduced average particle size (1 μm), expanded interlayer spacing (1.09 nm), and enhanced sulfur vacancy density. Interestingly, PANI-Fe@MoS2 achieved nearly 100% elimination of carbamazepine (CBZ) within 10 min, and its removal efficiency (k-value) surpassed most of those reported in the literature. Notably, PANI-Fe@MoS2 exhibited a high removal of TOC (nearly 50%), a wide pH operating range (2–10), and outstanding removal efficiency for various contaminants. Additionally, the quenching and electron paramagnetic resonance (EPR) experiments revealed that singlet oxygen (1O2) and hydroxyl radicals (˙OH) were the main reactive oxygen species (ROSs) for degrading CBZ. Moreover, the potential degradation pathways were proposed based on the intermediates of CBZ. This work provides a strategic paradigm for designing efficient heterogeneous Fe-based catalysts for environmental remediation.
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Journal of Materials Chemistry A
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2025
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IF 9.5
Qin Tang,Lingyue Wang,Shenglong Zhang,Pengfei Xue,Yuye Zhang,Hongbo Li,Dongdong Zhu
It is critical to develop highly efficient electrocatalysts for water splitting to achieve energy-saving hydrogen production. Recently, fullerene-based electrocatalysts have been widely reported for cathodic hydrogen evolution reaction (HER), while their application for intrinsically sluggish oxygen evolution reaction (OER) at the anode has been rarely explored. Herein, a novel OER electrocatalyst, NiFe-OC60, was prepared by introducing Ni and Fe species on fullerol C60(OH)x. Fullerene-based carbon support can provide a high surface area, and be served as an electron buffer due to its inherent electron-withdrawing property. Besides the synergistic effects between Ni and Fe, fullerene-based carbon support promotes the generation of high-valence Ni3+ species, thus contributing to improved OER performance. The as-synthesized NiFe-OC60 supported on glassy carbon electrode exhibits excellent OER results with a relatively small overpotential of 314 mV at the current density of 10 mA cm−2, and a small Tafel slope of 38.62 mV dec−1 in the alkaline solution. Our work demonstrates fullerene-based materials as promising electrocatalysts for emerging clean-energy related technologies.
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Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-17
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IF 31.6
Chen Si,Huang Fang,Mao Lijie,Zhang Zhimin,Lin Han,Yan Qixin,Lu Xiangyu,Shi Jianlin
Fe single-atom catalysts (h 3 -FNCs) with high loading, high catalytic activity and high stability were synthesized via a method capable of increasing both the metal loading and mass-specific activity by exchanging zinc with iron.
The “density effect,” derived from the sufficiently high density of active sites, has been discovered for the first time, leading to a significant alteration in the intrinsic activity of single-atom metal sites.
The superior oxidase-like catalytic performance of h 3 -FNCs ensures highly effective bacterial eradication.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Meiling Wu,Yang Tao,Yuwei Liu,Sanying Hou,Tiyang Xiao,Qing Fu,Guowen Peng,Lang Shi
In this study, Fe/N co-doped graphene-like honeycomb porous carbon (Fe-NC)was produced and used for the activating PMS to degrade TC. The Fe-NC catalyst has shown high activity in the TC degradation by activated PMS, with an efficiency of up to 94 % in 30 min. while the blank catalyst without N and Fe doping exhibited the lowest performance with 47.3 % TC degradation. Moreover, other operational factors of Fe-NC catalysts were also investigated to evaluate its catalytic activity. The burst experiments and electron paramagnetic resonance (EPR) experiments demonstrated that free radical paths (O 2 ·- ) and non-free radical paths ( 1 O 2 ) coexist inside the Fe-NC/PMS system. The experiment results and degradation mechanism analysis revealed that N species(Pyridine N, Graphite N,Fe-N x ) and iron species (Fe0) were possible to be the active species of catalysts. Furthermore, Fe-NC/PMS system was investigated for possible pathway of TC degradation by liquid mass spectrometry (LC-MS), and the presence of intermediates was analyzed for toxicity magnitude by ECOSAR software.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yujia Tong,Chenxuan Shao,Jinbo Chen,Fiona Hammond Quarcoo,Changqing Miao,Xiaohui Ju,Weixing Li
High hydrophobicity of polyvinylidene fluoride (PVDF) membrane surface results in adsorption of oil droplets and membrane fouling . A hydrogel coating with crosslinking network of polyvinyl alcohol (PVA), pyrogallol (PG) and Fe(III) based on PVDF membrane was proposed. Hydrogen bonds between PVA and PG in water were regulated by ethanol to form a uniform hydrophilic hydrogel coating on PVDF membrane. Chelation between PG and Fe 3+ significantly enhanced hydrogel adhesion. The surface energy of the developed PVDF-PVA/PG-Fe 3+ membrane was 39.96 mJ·m −2 , 2.71 times that of the pristine PVDF membrane, while its adhesion to oil is close to 0 μN. The permeate flux reached 1341 L·m −2 · h −1 at 0.1 bar for separating isooctane-in-water emulsions with good separation efficiency (>99 %) and cycling stability. The developed membrane could also effectively separate petroleum ether-in-water and dodecane-in-water emulsions.
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Jing Gao,Qitao Liu,Haotian Wang,Muhammad Bilal Akbar,Zhihua Wu,Jiabo Le,Jianming Li,Qinglu Liu,Yongbo Kuang
CuBi 2 O 4 (CBO) photocathodes hold significant promise for efficient photoelectrochemical (PEC) water splitting due to their favorable band gap and theoretical onset potential. However, their practical application is hindered by poor charge separation efficiency. Herein, we introduce a characteristic in-situ solution Fe-doping strategy that markedly improves photoelectrochemical performance of CBO, doubling the photocurrent density and achieving an unprecedented 190 mV anodic shift in the onset potential. By integrating with an electrochemical oxidation post-treatment, a record incident photon-to-current efficiency (IPCE) exceeding 40% at 0.6 V vs. RHE under visible light illumination is achieved. The versatility of the doping strategy is demonstrated across CBO photocathodes synthesized by different methods with various morphologies, grain sizes, and crystallinities. Mechanistic studies reveal that the gradient distribution of Fe 3+ ions generates an internal electric field that facilitates efficient charge separation and increases acceptor density. The strong Fe–O bonding also enhances structural stability against photo-induced corrosion. Notably, our investigation uncovers the non-temperature-dependent nature of CBO photocurrent, indicating that PEC performance enhancement primarily depends on reducing carrier recombination rather than improving bulk conductivity. This work lays the groundwork for future advancements in water splitting performance of CBO photocathodes, offering a complementary strategy to conventional methods for enhancing charge separation efficiency.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Yang Wang,Meili Ding,Wei Rong,Suyu Kong,Jianfeng Yao
Photodriven CO 2 conversion has been widely recognized as an effective pathway for achieving carbon neutrality. In this paper, we demonstrate the immobilization of bimetallic Zn/Fe ZIF onto the surface of Ti 3 C 2 T x MXene via an in situ growth process for photodriven solvent-free CO 2 cycloaddition. MXene can extend the optical response of bimetallic ZIF into the near-infrared region. In turn, the incorporated MOF particles effectively prevent the layers of MXene from stacking. The resulting Zn 20 Fe 1 -ZIF/MXene has improved activity (96% yield) in the cycloaddition of epichlorohydrin with 1 bar CO 2 under full spectrum illumination (350 mW/cm 2 ) for 6 h, ca. 3.4, 1.7, and 1.2 times higher than those of pure Zn 20 Fe 1 -ZIF, MXene, and the physical mixture, respectively. Besides, this hybrid catalyst provides desirable stability and performance even after several catalytic cycles, exposure to humid environment or under diluted CO 2 (15%). Control experiments and infrared thermography reveal the synergistic photocatalytic-photothermal contribution of hybrid materials to the photoinduced CO 2 fixation. Our research offers a facile method to construct MOF containing photocatalysts for application of CO 2 conversion with high practical utility.
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