Journal of Water Process Engineering
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2024
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IF 6.3
Mei Dong,Kuilong Liu,Guoqiang Song,Guiping Ma
In this study, MOF-on-MOF hybrids were successfully synthesized by interfacial growth method using CoZn-ZIF as guest MOF and MIL-101(Fe) as host MOF, and then employed as heterogeneous catalysts to activate peroxymonosulfate (PMS) in the degradation of dyes. The hybrids exhibited different morphologies depending on the Co/Zn ratios (10/0, 10/2, 10/10, and 2/10), all of which displayed exceptional catalytic performance. Notably, the hybrid with a Co/Zn ratio of 10/2 showed the highest degradation rate of MB, reaching 100 % removal within 3 min with a k obs value of 452.75 Lg −1 min −1 based on the pseudo-second-order kinetic model. Through EPR characterization and scavenging experiments, it was determined that the degradation of dyes occurred through a combination of radical (SO 4 •-, •OH)and non-radical ( 1 O 2 ) pathways, with 1 O 2 and SO 4 •- playing prominent roles. Various factors such as Co/Zn ratio, catalyst dosage, PMS concentration, initial pH, temperature, and MB solution concentration were systematically investigated to understand their influence on the catalytic performance. Furthermore, the influence of inorganic ions, humic acid (HA), and the reusability and stability of the catalyst was evaluated, demonstrating its potential for practical applications. Overall, this research provides valuable insights into the design and application of MOF-based catalysts for environmental remediation processes.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Chunru Sun,Min Xiao,Jianghao Tian,Huixian Zhang
A polysulfone/metal–organic framework (MOF) based photocatalytic nanofiltration membrane is proposed in this study. Interfacial polymerization (IP) is the universal method of preparing nanofiltration (NF) membranes. In this work, the (TFN) membranes were synthesized with an in-situ interfacial synthetic method to incorporate BiOCl/MIL-101(Fe)@PDA(BMP) into the polyamide (PA) selective layer. Five distinct BMP loadings (0, 0.05, 0.1, 0.15, and 0.2 wt%) were established to examine the impact of additional BMP on the physicochemical characteristics of the produced TFN membranes. Under the irradiation of a xenon lamp with a power of 300 W, the water flux of M3 at a pressure of 0.6 MPa was 277.14 L m -2 h -1 . Furthermore, the BSA-based antifouling tests demonstrated the membrane’s outstanding antifouling capabilities, with a flux recovery rate reaching 94.08 %. The optimal membrane maintained a high and stable retention of tetracycline for 12 h. The interfacial synthesis of MOF/PA offers a new approach to the fabrication of photocatalytic NF membranes.
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JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Yang Yang,Honghao Deng,Liying Liu,Jiahong Pan,Ping Chen,Zhicong Shi
O3-type Cu/Fe/Mn-based layered oxides are regarded as promising cathode materials for sodium-ion batteries due to the abundance of elements in the Earth's crust and the imperative for large-scale energy storage. However, these materials still encounter some challenges, including low capacity and insufficient rate performance. In this study, Al-doped, cobalt-free, and nickel-free Na 0.9 Cu 0.18 Fe 0.3 Mn 0.52-x Al x O 2 (x = 0, 0.03, 0.05, 0.08) are successfully synthesized by using the solid-state method to introduce non-electrochemically active elements to stabilize the crystal structure and enhance the electrochemical performance. The impact of Al-doping is comprehensively analyzed by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), galvanostatic intermittent titration technique (GITT), and electrochemical impedance spectroscopy (EIS). Al-doping effectively enhances the diffusion coefficient of Na + , reduces the Jahn-Teller effect caused by Mn 3+ and mitigates the transition from O3 to P3 phase. Finally, it stops the partial phase transitions from O3 to P3, which can be found in pristine oxide without Al-doping during charge-discharge cycling. Notably, the Na 0.9 Cu 0.18 Fe 0.3 Mn 0.47 Al 0.05 O 2 electrode exhibits a reversible capacity of 123.89 mAh g −1 at 0.1 C, a capacity retention rate of 91.1 % after 200 cycles at 1 C, and a discharge capacity of 66.36 mAh g −1 at a high rate of 5 C.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Shuyue Wang,Dan Hu,Yang Liu,Huixin Xiong
Antibiotics pollutants are arousing seriously environmental issues, so the highly efficient photo-Fenton catalysts have been developed in their treatments. In this work, according to the results of XRD, Raman, FTIR, and XPS, ferrihydrite/polyaniline (Fh/PANI) catalyst could be successfully prepared in waste iron-bacterial cultures (shorted as Fe(III)/EPS-solutions) with PANI conductor ((C 6 H 7 N) n , 200–300 nm). The Fh/PANI was an optimal photo-Fenton catalyst with good physical properties for tetracycline hydrochloride (TCH, C 22 H 25 ClN 2 O 8 ) degradation. In photo-Fenton systems with 30 mmol/L H 2 O 2 , 40 mg/L TCH, 0.2 g/L catalyst, and pH 4.0 under the visible light irradiation, degradation efficiency was 94% for Fh/PANI (82% for Fh). Kinetics data of TCH degradation well followed to pseudo-first-order model ( R 2 =0.974 for Fh/PANI, and R 2 =0.929 for Fh). The Fh/PANI catalyst had a good stability for TCH degradation, and the efficiencies ranged in 94%−77% within its five runs. The TCH could be efficiently mineralized into H 2 O and CO 2 inorganic molecules, and the producing ∙O 2 − was the key action group. These results indicate Fh/PANI photo-Fenton catalyst will have a potential application in treating antibiotic polluted waters. It also can provide a good approach of preparing Fe-(oxyhydr)oxide/conductor composites in waste iron-bacterial cultures.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Xiaoman Li,Suran Huang,Han Li,Haiming Huang
The pervasive presence of refractory organic pollutants and phosphorus(P) in wastewater has attracted great attention but lacks efficient treatment technology. Herein, we ingeniously designed FeS nanosheets decorated Fe foam(FFS) as a catalytic filter for the co-removal of organic pollutants and P. The hierarchical porous structure and highly exposed active sites of FFS composites enable high catalytic efficiency for the degradation of different organic pollutants(ciprofloxacin, levofloxacin, amoxicillin, etc.) via the activation of peroxymonosulfate(PMS), and the leached Fe ions removed phosphate simultaneously. 97.2 % ciprofloxacin(CIP) and 73.8 % P were removed synchronously from water within 40 min in the heterogeneous Fenton system(FFS-2/PMS). Scavenging experiments, EPR analysis, and electrochemical analysis results showed that CIP was oxidized into organic intermediates by •O 2 - , •OH, and SO 4 •- , and P was mainly removed by chemical precipitates of Fe(III)-P and adsorption. E.coli and cell survival tests verified the significant toxicity reduction after the reaction. Furthermore, the FFS-based catalytic filter can be engineered for continuous decontamination of combined pollution of P and organic pollutants. The removal rate of CIP and P reached > 90 % and > 80 % over 7 days. The work offers a paradigm for the treatment of multiple contaminants and shows the prospects of Fe foam-based materials for large-scale application water purification.
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RARE METALS
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2025
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IF 11
Wei He-He,Zhang Xin-Xin,Sun Si-Wei,Gai Shi-Li,Yu Hai-Tao,Xie Ying
Transition metal phosphides (TMPs), with tunable electronic structures and diverse compositions, are promising candidates for electrocatalytic water splitting. However, their unsatisfactory electrical conductivity and tendency to aggregate during reactions result in structural instability, ultimately hindering further improvement of their electrocatalytic performance. To address these issues, a bamboo-leaf-like FeCoP/MXene heterojunction was synthesized by hydrothermal and thermal treatments, utilizing highly conductive MXene as the substrate. Density functional theory (DFT) calculations and experimental characterization reveal that strong Ti–O–Co/Fe covalent bond are formed between MXene and FeCoP through hybridization of O 2p and Co/Fe 3d orbitals, which enhance the structural stability of the interface and facilitate the effective anchoring of FeCoP on the MXene surface. Consequently, the structural stability and electrical conductivity of the catalyst are improved simultaneously. Additionally, interfacial charge redistribution optimizes the Gibbs free energy of hydrogen adsorption at the Co, Fe, and Ti sites while promoting the adsorption and activation of water molecules. These factors interact synergistically, leading to enhanced bi-functional electrocatalytic performance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In a FeCoP/MXene (+||−) two-electrode system, the catalyst achieves a current density of 10 mA cm –2 at a potential of 1.5 V, which is superior to the RuO 2 (+)||Pt/C (−) system. The assembled water splitting device exhibits long-term stability for up to 100 h at a current density of 100 mA cm –2 . Furthermore, an anion exchange membrane water electrolyzer (AEMWE) equipped with FeCoP/MXene as both anode and cathode achieves an industrial-grade current density of 500 mA cm –2 at 1.83 V. These results highlight the critical role of interfacial engineering in enhancing the electrocatalytic performance of TMPs for water splitting and provide valuable insights for the design of novel bifunctional TMP catalysts. Graphical abstract
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Small
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2025
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IF 12.1
Guangrong Qian,Renyuan Deng,Xiangmei Liu,Yi Wang,Jin Huang,Congyang Mao,Chaofeng Wang,Hanpeng Liu,Zhaoyang Li,Shengli Zhu,Hui Jiang,Zhenduo Cui,Yufeng Zheng,Shuilin Wu
The transmission of pathogenic bacteria via the contaminated surfaces of interactive touchscreens is an important route of infection. It is therefore imperative to develop a functional film with antibacterial properties to prevent cross-infection. In this paper, a bilayer thin-film structure composed of iron-doped and copper-doped zinc oxide (Fe-ZnO/Cu-ZnO) is synthesized through a spin coating technique based on sol-gel. The synergistic effects of metal ion doping, combined with the influence of the internal electric potential, during the photocatalytic reaction process, promote the separation and migration of photogenerated carriers. As a result, it notably boosts the photocatalytic properties. The nanofilm is demonstrated to achieve a rapid bactericidal effect (surpassing 90%) under sunlight irradiation. Furthermore, it is shown to completely kill bacteria after 20 min of illumination and to maintain excellent antibacterial performance (surpassing 90%) for a period of 30 days. Concurrently, the thin film displays both exceptional light transmittance (surpassing 90%) and noteworthy benefits, including environmental sustainability, cost-effectiveness, and the capacity for safe disinfection. The thin film exhibits considerable potential for implementation on surfaces subject to high-frequency public contact. It boasts extensive application prospects and serves as a foundational reference for the design of photocatalytic antibacterial thin films.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Zizai Ma,Zihao Wan,Shuaili Zhao,Jinping Li,Jianping Du,Xiaoguang Wang
Bimetallic single-atom catalysts have garnered considerable interest in the field of the oxygen reduction reaction due to their unique electronic configurations and synergistic catalytic effects. However, precise modulation of d-orbital electron distribution at single-atom sites and comprehensive elucidation of the underlying catalytic mechanisms continue to present significant challenges. Herein, the FeCo(mlm)–N–C catalyst, integrating atomically dispersed Fe–Co dual-metal sites and Fe3C nanoparticles, was synthesized by using an encapsulation and ligand exchange strategy. Comprehensive analyses and theoretical simulations reveal that the incorporation of Fe3C nanoparticles induces significant d-orbital electron delocalization at the Fe active sites. This tailored electronic configuration effectively modulates Fe d–O p hybridization between the Fe active sites and adsorbed OH*. Consequently, it optimizes the occupancies of bonding and antibonding orbitals, thereby accelerating OH* desorption. This mechanism enables FeCo(mlm)–N–C to exhibit excellent catalytic performance and remarkable stability in both acidic and alkaline environments, while demonstrating superior activity in zinc-air batteries and proton exchange membrane fuel cells. This work not only presents a highly efficient non-noble metal electrocatalyst but also provides valuable insights into the rational development of advanced transition metal–nitrogen–carbon catalysts for energy-related applications.
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FOOD CHEMISTRY
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2025
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IF 9.8
Linqian Hou,Qiulan Li,Jitao Li,Dezhi Yang,Yaling Yang
A curcumin based iron, copper and boron doping carbon dots (Cu,Fe,B/Cur-CDs) with ascorbic acid oxidase (AAO)- and peroxidase (POD)-like activities were synthesized via microwave digestion. The Cu,Fe,B/Cur-CDs oxidize ascorbic acid (AA) to dehydroascorbic acid (DHAA), which reacts with o -phenylenediamine (OPD) to generate fluorescent 3-(1,2-dihydroxyethyl) furo [3,4-b]quinoxaline-1-one (DFQ). Simultaneously, it catalyzes OPD/H₂O₂ to fluorescent 2,3-diaminophenazine (DAP) via POD-like activity. In the presence of metronidazole (MNZ), it induces competitive inhibition by competing with OPD for the active sites of Cu, Fe, B/Cur-CDs. This reduces the generation of •OH and •O₂ − radicals, hindering the oxidation of OPD to form DAP and thus decreasing the system's fluorescence intensity. Additionally, MNZ quenches the fluorescence of DFQ at 420 nm via the inner filter effect. Therefore, a dual-signal fluorescence sensor for MNZ detection was constructed. The sensor achieved 91.6–109.9 % and 86.2–116.2 % recovery in food samples using standard addition, demonstrating high sensitivity for dual-signal detection systems.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Xianni Song,Wenzhong Wang,Yu Guo
Methyl phenyl sulfoxide (PMSO), conventionally employed to probe high-valent metal-oxo species in persulfate processes, is reveals herein as a substrate-dependent mediator that selectively enhanced/inhibited degradation of various pollutants in Fe(II)/peroxymonosulfate (PMS) systems. Control experiments across transition-metal systems (Fe(II)/Co(II)/Cu(II)/Mn(II)/Fe(III)) confirmed that this phenomenon is unique to Fe(II)-based systems. The system-dependent behavior of PMSO is demonstrated to correlate with ROS generated in each system. In Fe(II)/PMS systems dominated by Fe IV O 2+ , SO 4 ·– and unidentified iron-centered species, PMSO exhibits dual functionality: as an electron shuttle, enhancing degradation of electron-rich pollutants by facilitating electron transfer and promoting the Fe(III)/Fe(II) cycle; conversely, for electron-deficient pollutants, PMSO functions as a conventional scavenger, suppressing degradation. Quantitative structure-activity relationships (QSARs) modeling establishes that PMSO enhances degradation for pollutants with the highest occupied molecular orbital (HOMO) ≥ −8.3154 eV and ionization potential (IP) ≤ 6.9711 eV; otherwise, it inhibits degradation. In Co(II)/PMS systems dominated by Coᴵᴵ-PMS* complexes, PMSO competitively consumes Coᴵᴵ-PMS* and quenches SO 4 – resulting in uniform inhibition of all pollutants. Negligible PMSO effect was observed in Cu(II)/Mn(II)/Fe(III) systems with ineffective PMS activation. This work challenges the uncritical use of PMSO as an inert probe in Fe(II) systems, highlights metal-peroxo complexes as pivotal intermediates dictating electron-transfer pathways and provides principles for designing selective advanced oxidation processes (AOPs) through mediator tuning.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Mengyuan Qiu,Yongzhi Xiong,Wei Zhao,Dong Ouyang,Zongxuan Wu,Tangtianxiang Liang,Changzhou Chen,Shengchun Hu,Hao Sun
Designing low-cost, high-performance electrocatalysts for the electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to produce 2,5-furandicarboxylic acid (FDCA) remains a significant challenge. Herein, we report a novel post-pyrolysis phosphidation method for preparing Nb- and Fe-doped CoP-based catalysts. Nb-CoP@NC delivers a current density of 91.79 mA cm⁻² at a potential of only 1.50 V vs. RHE, achieving nearly 100 % HMF conversion, 98.3 % FDCA selectivity, and 95.6 % Faradaic efficiency (FE). Structural and surface analyses via XRD and XPS reveal that Nb doping significantly modulates the electronic structure of CoP, generating Nb 5+δ active species, which show superior catalytic activity for HMFOR compared to Fe 3+δ . This work not only highlights the pivotal role of Nb doping in enhancing catalytic performance but also provides a general and facile strategy for constructing efficient bimetallic CoP-based catalysts for biomass-derived HMF oxidation.
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ANALYTICA CHIMICA ACTA
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2025
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IF 6
Jingzhi Zhou,Xichen Shi,Chaoqin He,Xiuwen Zheng,Ruo Yuan,Xia Yang
Background Entropy-Driven Circuits (EDC), distinguished by their spontaneous operation and absence of enzymatic reactions, represent a superior strategy for integration with CRISPR/Cas systems, as they obviate the potential for interference among various enzymes during the process of DNA amplification and CRISPR/Cas system integration. Due to the wide band gap of TiO 2 , its response to visible light is limited, and owing to its high crystallinity and exceptionally stable crystal lattice, the charge transfer (CT) process in TiO 2 is suboptimal. Results In this study, lychee-like Fe–TiO 2 was firstly prepared to serve as Raman enhanced substrate, facilitating exciton capture and separation to exhibit an excellent Surface-enhanced Raman spectroscopy (SERS) performance. It is proven that the incorporation of Fe results in a significantly narrower band gap for TiO 2 , facilitating exciton resonance. The amount of Fe in TiO 2 was optimized to fabricate a SERS biosensor for detection of miRNA-21 based on the Cas13a assisted entropy-driven system. The detection limit of miRNA was 43.88 fmol/L. Significance This work proposes a sensing strategy that integrates the CRISPR/Cas system with EDC, leveraging a semiconductor substrate exhibiting superior SERS performance to provide a stable Raman signal, thereby enabling highly sensitive detection of miRNA-21, which has a potential application in disease early warning and treatment.
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