Surfaces and Interfaces
·
2025
·
IF 6.3
Junhao Huang,Ruixue Shi,Andrei Ivanets,Alexander A. Ratko,Tatyana Kouznetsova,Haixin Wu,Xintai Su
Hexavalent chromium (Cr(VI)) contamination in water poses a significant threat to human health. In this work, Fe and N co-doped biochar (Fe-N-C) was fabricated from municipal sludge using urea as a nitrogen source via the acidification-one-step pyrolysis method. This approach overcame the low adsorption capacity of self-carbonated sludge and achieved high Cr(VI) removal efficiency. Batch experiments and characterization techniques were employed to investigate the synthesis mechanism of Fe-N-C and its Cr(VI) removal mechanisms. At a urea/sludge mass ratio of 0.5, Fe-N-C-0.5 demonstrated superior Cr(VI) adsorption capacity (205.92 mg g⁻¹), primarily governed by spontaneous monolayer chemisorption and intraparticle diffusion. The adsorption process was unaffected by coexisting ions, and it exhibited excellent regeneration stability as well as substantial potential for practical applications. In addition, Fe-N-C-0.5 exhibited high biosafety before and after Cr(VI) removal. Urea doping facilitated nitrogen incorporation and anchored free Fe³⁺, forming the Fe-N-C structure that promoted the transformation of Cr(VI) to Cr(III) through electrostatic adsorption, reduction, and cation-π interactions. These results suggest Fe-N-C is an effective adsorbent for Cr(VI)-contaminated wastewater treatment.
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DESALINATION
·
2026
·
IF 9.9
Anrong Yao,Xingwei Fu,Qian Xu,Chang Liu,Yunbo Mo,Qinglan Xue,Jiaojiao Shang,Jianwu Lan,Shaojian Lin
Eliminating various organic pollutants from wastewater continues to pose a major environmental issue. Herein, CO 2 -responsive magnetic bio-aerogels (Ag/Fe-NC@DCG) integrating “smart” adsorption and photo-Fenton-like degradation were constructed by embedding surface plasmon resonance (SPR)-enhanced MOF-derived Ag/Fe nanocarbon (Ag/Fe-NC) into cellulose nanocrystal reinforced gelatin aerogels, followed by surface functionalization with a CO₂-responsive silane coupling agent ( N, N -diethyl-3-aminopropyltrimethoxysilane). The resulting aerogels exhibited outstanding adsorption capacities toward charged pollutants, reaching 859.62 mg/g for negatively charged methyl orange (MO) and 635.92 mg/g for positively charged methylene blue (MEB), governed by electrostatic interactions and hydrogen bonding. The adsorption process was well described by the Langmuir adsorption isotherm model and pseudo-second-order adsorption kinetic model. Remarkably, CO 2 served as a trigger gas to enable rapid and selective adsorption of negatively charged organic pollutants from the mixture, thereby realizing CO 2 -regulated selective adsorption. As anticipated, under visible light irradiation in the presence of peroxymonosulfate (PMS), the Ag/Fe-NC component efficiently catalyzed photo-Fenton-like reactions, leading to significantly enhancing removal efficiencies for both charged and neutral organic pollutants. For neutral bisphenol A (BPA) and amphoteric tetracycline hydrochloride (TCH) that were initially unadsorbed, their removal efficiencies rose dramatically from 5.24% and 12.79% to 90.67% and 97.40%, respectively. Additionally, the aerogels demonstrated excellent recyclability, mechanical robustness, and antibacterial activity. Overall, this work presents a versatile and sustainable aerogel platform that integrates CO 2 -triggered selective adsorption with photo-Fenton-like degradation, offering a prospective pathway for wastewater remediation.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Xingzhi Jin,Jing Guo,Minghui Gao,Ting Chen,Chuang Wang,Shengyao Wang,Peng Cai,Hao Li,Haotian Liu,Hao Chen,Xing Ding
Traditional Fenton reaction is limited by strict pH and iron sludge. integrating photo-Fenton enables operation under mild conditions. We report a one-step hydrothermal synthesis of Fe-modified Bi 2 WO 6 (Fe-BWO) to create an efficient photo-Fenton synergistic system for ciprofloxacin (CIP) removal under visible light. The Fe-BWO system achieved 83.7 % CIP degradation in 1 h, surpassing standalone photocatalysis and homogeneous Fenton. The degradation rate was 6 times that of photocatalysis and 1.5 times that of homogeneous Fenton. Crucially, the system exhibited excellent stability, wide pH applicability, and low H 2 O 2 consumption OH, and ·O 2 − were confirmed as major reactive species. Mechanistic studies indicate that the narrowed band gap promotes electron migration, while H 2 O 2 -induced surface microenvironment variation (attributed to Bi (3−x)+ electron redistribution) is vital for molecular oxygen activation. This work offers novel insights into H2O2 activation and the impact of surface microenvironments in photo-Fenton processes.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Lin Luo,Zhiyuan Liu,Yue Pan,Tao Xu,Ang Xiao,Baolong Jiang,Weiting Yang,Yida Deng
To overcome the shortcomings of epoxy coatings in inadequate long-term barrier properties and lack of active corrosion inhibition at defect sites, we developed a self-healing epoxy coating by incorporating a MIL-100(Fe) nanocomposite loaded with benzotriazole (BTA), which was synthesized using solvothermal and solution impregnation methods. This multifunctional system provides robust barrier protection and alkaline-triggered self-healing capabilities. The composite enables alkaline-triggered BTA release, forming a protective film at damaged sites. The synthesized MIL-100@BTA nanocomposite exhibits a high surface area, thermal stability, and controlled BTA release. In simulated seawater, the MIL-100@BTA/EP coating maintained a low-frequency impedance modulus of 5.03 × 10⁹ Ω·cm² after 50 days, significantly outperforming pure epoxy. Scratch tests, electrochemical tests, scanning electron microscopy (SEM) and electron dispersive spectrum (EDS) analyses confirmed that the released BTA inhibits corrosion by forming a protective film at defect sites. This work presents an effective strategy for engineering high-performance and self-healing coatings.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Quanhui Hou,Qianyang Wang,Xiao Xu,Zhihao Xu,Peng Jiang,Maziar Ashuri,Yunxuan Zhou,Zhao Ding
Developing efficient and scalable catalysts remains crucial for advancing practical MgH 2 -based solid-state hydrogen storage. In this work, an oxide-precatalyst strategy is proposed, where Fe 3 O 4 nanoparticles are uniformly anchored on leaf-derived porous carbon to form a Fe 3 O 4 /leaf-carbon catalyst that converts in situ into highly dispersed Fe/MgO interfaces during the initial dehydrogenation process. The resultant MgH 2 + 10 wt% Fe 3 O 4 /leaf-carbon composite exhibits a markedly improved hydrogen sorption performance, with an onset desorption temperature of 215 °C, releasing 6.41 wt% H 2 within 8 min at 350 °C, and reabsorbing 6.22 wt% H 2 at 175 °C (3 MPa) within 1 h. Notably, the activation energies for hydrogenation and dehydrogenation are drastically reduced to 53.27 kJ mol −1 and 91.45 kJ mol −1 , respectively. Furthermore, after undergoing 20 consecutive adsorption cycles, this composite material still maintained 96.3 % of its hydrogen storage capacity compared to the initial hydrogen absorption. Structural characterizations confirm that Fe 3 O 4 is reduced to Fe while forming a stable Fe/MgO heterointerface that provides abundant active sites and accelerates hydrogen diffusion. This study elucidates the oxide-to-metal interface transformation mechanism as an effective pathway to simultaneously lower thermodynamic barriers and enhance kinetic reversibility, offering a cost-effective and sustainable strategy for engineering next-generation MgH 2 -based hydrogen storage materials.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Mingjie Lei,Yi Zhao,Xiujuan Sun,Yuan Pan,Yadong Liu,Jiayu Kang,Diye Wei,Luyi Zou,Yong Pei
Electrocatalytic urea oxidation reaction (UOR) holds great promise in green energy conversion and pollutant degradation with low energy-consumption. Herein, Fe-NiTe/NiSe 2 nanosheets array with super-hydrophilic/aerophobic surface and enhanced built-in electric field is constructed. The surface hydrophilic/aerophobic properties enabling rapid bubble nucleation and efficient detachment, liberating covered active sites, thus improving the surface adsorption kinetics of urea molecular and OH − . Moreover, Fe incorporation accelerates charge transfer and modulates the built-in electric field at the NiTe/NiSe 2 heterojunction interface. This reduces the surface reconstruction potential and optimizes the occupancy of hybrid anti-bonding (d-δ)* orbitals, leading to the formation of electron-rich region (Fe-NiTe) and electron-deficient region (Fe-NiSe 2 ), which preferentially adsorbs the electron-withdrawing (C═O) and electron-donating (─NH 2 ) groups of urea, respectively, thereby optimizing the adsorption energy of urea molecules. Therefore, the Fe-NiTe/NiSe 2 heterojunction exhibits excellent alkaline UOR performance, requiring only 1.447 V RHE to deliver a current density of 100 mA cm −2 , which it can maintain for over 90 h. The Fe-NiTe/NiSe 2 (+) ∥ Pt/C (-) urea electrolyzer can maintain stable for 150 h at 100 mA cm −2 . This work offers a macro- and microscopic coupling engineering strategy to address the surface and intrinsic properties for alkaline UOR, holding significant practical value for advancing energy-efficient hydrogen production and wastewater treatment.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.5
Yujing Zhou,Yizhe Yang,Yinqi Sun,Zihao Wang,Hengbo Ding,Kai Liu,Weiguo Zhang,Songke Feng
To overcome the low nitrogen use efficiency (<40%) of conventional urea, this study utilizes the metal–organic framework MIL-100(Fe)—characterized by ultrahigh surface area and tunable mesoporosity—as a promising carrier for nano slow-release fertilizers with enhanced nutrient stability. Fourier transform infrared spectroscopy, thermogravimetric analysis, and Brunauer–Emmett–Teller measurements confirmed that urea was uniformly accommodated within the MOF channels in an amorphous, physically adsorbed state without chemical bonding. High-performance liquid chromatography revealed that loading capacity was primarily determined by the urea-to-MOF mass ratio, whereas loading temperature and duration had negligible effects, enabling precise synthesis control. Orthogonal optimization identified the optimal parameters (mass ratio 1:1, 110°C, 7 h), yielding a urea loading of 59.2% and encapsulation efficiency of 51.8%. Release experiments demonstrated a 22.5-fold extension in release duration compared to pure urea, with 87.6% cumulative release over 180 h governed by Fickian diffusion. Furthermore, physical characterization and bench-scale metering tests verified the granules' mechanical adaptability, achieving stable, continuous discharge comparable to urea. This work validates MIL-100(Fe)@UREA as a high-capacity, mechanically viable platform for sustainable and precision nutrient delivery. These results not only highlight the potential of MIL-100(Fe) in advanced slow-release fertilizer systems but also provide valuable insights for designing efficient and environmentally sustainable nutrient delivery platforms.
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Carbon Energy
·
2026
·
IF 24.2
Chunfa Liu,Jinxian Feng,Shuyang Peng,Di Liu,Lun Li,Ziwen Feng,Juanjuan Wang,Weng Fai Ip,Hongchao Liu,Jin-Song Hu,Hui Pan
Iron-based self-supported electrocatalysts offer cost-effective oxygen evolution activity but suffer from severe stability degradation under industrial operation. Here, we present that this long-standing challenge can be solved by synergistic interface engineering, where a Fe nitride/oxide (NOIF) heterostructure interlayer that bridges active species and conductive substrate in Ni@NOIF is constructed. This innovative design simultaneously optimizes electron transfer and prevents active phase detachment, achieving long-term industrial-grade stability. Ni@NOIF sustains 1000 mA cm −2 for more than 370 h in 6 M KOH at 60°C (> 2000-fold than Ni@IF). Practical validation in an industrial electrolyzer demonstrates the continuous stable operation for 170 h at ampere-level current density. Mechanistic studies reveal that the Fe 4 N/Fe 3 O 4 interface electronically modulates NiFeOOH active sites, while suppressing Ni/Fe leaching. This study establishes interface-engineered Fe nitride/oxide interlayers as a stability promoter, providing a blueprint for durable electrocatalyst design in industrial hydrogen production.
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高影响因子
Journal of Hazardous Materials Letters
·
2026
·
IF 8.1
Jibo Dou,Yichao Xu,Yunfei He,Ruoru Xu,Yao Yue,Feifei Chen,Yuchi Zhong,Xuetong Qu,Jiafeng Ding,Hangjun Zhang
Fe-doped carbon matrices have garnered significant attention as peroxymonosulfate (PMS) activators for the removal of refractory organic pollutants. However, the role of Fe dopant in PMS activation remains unclear, especially concerning the relative contributions and reaction pathways of high-valent iron oxidations. In this study, a series of Fe-doped carbon nitride (CN) catalysts with varying iron contents was synthesized and utilized for the catalytic degradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Results showed that Fe doping significantly enhanced PMS activation, with the highest TCDD degradation rate achieved by Fe-CN-3, exhibiting a 4.6-fold improvement. Quenching experiment revealed that increasing Fe content shifted the degradation mechanism from a radical-dominated process (76.1%) to a Fe V =O-driven nonradical pathway (55.8%); consequently, the Fe-CN-3/PMS system exhibited significant resistance to common environmental interferents. Theoretical calculations further confirmed that the Fe(III)-PMS interaction weakened both the O 2 -O 3 and O 3 -H bonds, thereby enabling their thermodynamically feasible cleavage and the subsequent generation of Fe V =O via a coupled electron-proton transfer pathway, which ultimately enhanced the electrophilic σ-attack on TCDD. These findings highlight the criticality of the metal dopant's local coordination environment in steering persulfate activation pathways, guiding the rational design of catalysts for selective oxidant generation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xiangjun Chen,Jinshuo Qiao,Zhenhua Wang,Wang Sun,Kening Sun
The performance and stability of direct carbon solid oxide fuel cells (DCSOFCs) are severely affected by the electrocatalytic activity of their anode materials . In this work, a cobalt doped layered perovskite , (PrBa) 0.95 Fe 1.8−x Co x Nb 0.2 O 5+δ (PBFCo x N, x = 0, 0.1, 0.2, 0.3), is investigated as the anode material for a DCSOFC. Co 3 Fe 7 alloy particles are exsolved on the perovskite substrate under the reduction of carbon, which improves CO chemisorption and electrochemical oxidation . This enhances the electrochemical performance of the anode. The electrolyte-supported cell with a (PrBa) 0.95 Fe 1.6 Co 0.2 Nb 0.2 O 5+δ (PBFCo 0.2 N) anode achieves a peak power density of 525.6 mW cm −2 at 800 °C, fueled by activated carbon. The performance of this anode material is comparable to or exceeds that of previously reported anodes, indicating that the PBFCo 0.2 N anode is a promising option for DCSOFCs.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 93
·90797-90805
·
IF 3.289
Jingjing Xi,Fang Wang,Riguo Mei,Zhijie Gong,Xianping Fan,Hui Yang,Liang An,Qixing Wu,Zhongkuan Luo
In this work, a graphene supported Fe–N–C composite catalyst, synthesized by pyrolysis of graphene oxide (GO), graphitic carbon nitride (g-C3N4), ferric chloride (FeCl3) and carbon black (Vulcan XC-72), was evaluated for oxygen reduction reaction (ORR) in acid media. The introduction of carbon black was to separate the graphene sheets to enhance the specific surface area and thus improve the catalytic activity of the catalyst. The experimental results showed that the composite catalyst could yield an average electron transfer number of 3.85 and its onset and half-wave potentials for acidic ORR were only 56 and 69 mV smaller than those of Pt/C (40 wt% Pt) catalyst, respectively. The as-prepared catalyst was applied in an acid direct methanol fuel cell as the cathode catalyst and a peak power density of 11.72 mW cm−2 at 30 °C was demonstrated when feeding the anode and cathode with a 1 M methanol solution and air, respectively, suggesting its promising application.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Longqian Xu,Xiaojun Xu,Deli Wu
In this study, the effect of initial dissolved oxygen (DO i ) on the efficiency of removing Cd 2+ from wastewater using a newly designed closed-atmosphere electrocoagulation (CAEC) system was investigated. The effects of factors such as temperature, initial pH, current density, and electrolyte composition (NaCl and Na 2 SO 4 ) were investigated. The results indicated that the removal efficiency of Cd 2+ could be enhanced by increasing the initial pH, current density, and Na 2 SO 4 dosage at initial DO concentration of 1.6 mg/L. However, a low current efficiency was also obtained when a high current density was applied because the high anodic potential resulted in water electrolysis. In brief, the generation of green rust (GR) promotes Cd 2+ removal, particularly under anaerobic conditions, and Na 2 SO 4 positively affects the flocculation and adsorption efficiencies of GR by strong charge neutralization. The obtained results can provide meaningful insights for the application of Fe–electrocoagulation in real industrial wastewater and understanding the mechanism of Fe based hydroxide coagulations for toxic metal removal.
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高影响因子
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