ENVIRONMENTAL RESEARCH
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2026
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IF 7.7
Teng Bao,Cheng long Li,Wei Wei,Mekdimu Mezemir Damtie,Zhijie Chen,Haijiao Xie,Bing-Jie Ni
Antibiotics (e.g., ofloxacin) pollution is an emerging environmental concern due to its persistence and potential health risks. Advanced oxidation processes (AOPs) offer promising solutions, yet their practical application is often limited by catalyst cost and stability. Here, we report the use of natural vivianite—a low-cost iron phosphate mineral—as an efficient peroxymonosulphate (PMS) activator for ofloxacin degradation. Under the optimised conditions, 97 % of ofloxacin was effectively degraded within 60 min. The ofloxacin degradation ratio could still reach 76 % after three consecutive cycles. Mechanistic investigations revealed Mn 2+ and Co 2+ isomorphic substitutions within the vivianite lattice, which induced electron cloud redistribution and promoted the formation of metal–oxygen–metal and metal–oxygen bonds. These structural changes enhanced charge transfer and facilitated PMS adsorption and activation via both surface-bound sites and leached phosphate species. Electron paramagnetic resonance spectroscopy confirmed that degradation proceeded through synergistic radical (·OH, SO 4 · - , O 2 · - ) and non-radical ( 1 O 2 ) pathways. Importantly, the degradation products exhibited significantly lower toxicity than ofloxacin itself, underscoring the environmental relevance of this process. These findings highlight the potential of natural vivianite as a cost-effective and sustainable PMS activator for antibiotic removal in water treatment applications.
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CERAMICS INTERNATIONAL
·
2026
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IF 5.6
Jialong Wu,Zhen Li,Weidong Gu,Xinyan Niu,Yunbo Wang,Ding Huang,Shuangshuang Jiang,Manhong Huang,Jun Li,Guanghui Li
Densification of silicon carbide (SiC) ceramic membrane typically requires sintering temperatures above 2000 °C, resulting in high energy consumption and substantial fabrication costs, and conventional SiC membrane exhibit limited removal efficiency for small molecules. To address these challenges, a co-sintering method was employed to fabricate cobaltic oxide (Co 2 O 3 ) loaded SiC catalytic membrane, with the Co 2 O 3 content systematically optimized. Co 2 O 3 functions as both a sintering temperature-lowering aid and an active site for catalytic ozonation of pollutants. Compared to pure SiC membrane (water permeability: 1200 L m −2 h −1 bar −1 ; flexural strength: 10.5 MPa), the Co@SiC membrane demonstrated significant improvements in both water permeability (1400 L m −2 h −1 bar −1 ) and mechanical strength (13.0 MPa). Numerical simulation further elucidated the neck formation dynamics. Moreover, Co@SiC membrane effectively degrades 95 % Congo red within 20 min, attributed to the generation of superoxide radicals (•O 2 − ). Density functional theory (DFT) calculations illustrated Co sites can effectively absorb ozone molecules and break O-O bond in ozone to generate •O 2 − . Fukui index analysis further indicated •O 2 − tend to attack N=N double bonds in dye molecules. This study proposes a comprehensive understanding of low-temperature sintering behavior and catalytic ozonation performance of Co 2 O 3 modified composite membrane, offering a sustainable strategy for membrane fabrication and wastewater treatment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Ge Yan,Yuting Wang,Ji Ni,Ying Jiang,Jinping Liang
Value-added utilization of biowastes has been a research hot spot in waste-to-resource field. However, the roles of the self-confined trace elements in biowaste-derived carbon have been frequently neglected. Herein, using mango seeds-derived carbon (MSC) as a proof of concept, the pivotal roles of self-confined trace elements in peroxymonosulfate (PMS) activation toward Rhodamine B (RhB) removal were rectified. The selected mesoporous MSC 1000 (carbonization at 1000 °C), with more than 10 trace elements (Ca, O, K, Mg, Si, Fe, Cu, etc.), had an ultrahigh BET specific surface area of 1903 m 2 /g. It presented outstanding adsorption capacity, which, in combination with remarkable activity for PMS activation, facilitated total RhB removal within 60 min. Quenching experiments, EPR tests and chemical probes collectively revealed that high-valent metal-oxo species, e.g., Fe(IV) O, generated from self-confined trace metal/metal oxides, dominated RhB mineralization. Furthermore, the secondary 1 O 2 was also produced at pyridinic N and graphite N active sites. In addition, MSC 1000 had prominent adaptability to complicated water matrices. Surprisingly, regeneration by recalcination can improve catalyst’s performances. This study help recognize the critical roles of trace components in carbonaceous catalysts in Fenton-like oxidation toward wastewater decontamination.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 11.3
Xuedong Du,Junjie Chen,Li Feng,Jun Zhao,Hexuan Deng,Ziye Wang,Jufeng Li,Yinan Song,Qingrui Zhang
Biomass-derived non-metallic electrocatalysis offers a sustainable strategy for pollutant degradation; however, its practical implementation is often hindered by unclear activation mechanisms, limited selectivity, and weak catalytic activity. In this study, we developed an innovative approach to transform common biomass waste into amyloid-like fibrils process (ANFs), thereby maximizing the electrocatalytic performance of metal-free manner. The distinctive ultra-high aspect ratio of ANFs facilitates extensive exposure of active sites, while abundant amino acid-derived N/O-doped defects synergistically enhance the three-electron oxygen reduction pathway, enabling efficient generation of reactive oxygen species. When applied to real high-salinity aquaculture wastewater containing tetracycline (TC), the resulting ANF-based catalysts (ANFCs) demonstrated outstanding degradation efficiency (>85 %) across a wide pH range (3–9), achieving a TC oxidation rate three times higher than that of conventional carbon cloth. The ANFCs delivered a catalytic performance of 22.0 g TC g −1 catalyst A −1 h −1 , on par with many metal-based catalysts. Furthermore, compared to traditional electro-Fenton systems, the ANFC-enabled electro-assisted oxidation processes (ANFC-EAOPs) supported continuous treatment of marine aquaculture wastewater while reducing sludge generation by 90 %. A comprehensive life cycle assessment confirmed the system scalability and environmental sustainability, underscoring its potential as a robust, versatile, and metal-free solution for advanced wastewater treatment and diverse application.
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Surfaces and Interfaces
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2026
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IF 6.3
Jianle Wang,Hong Deng,Jiaxin Lv,Li Ma
To overcome mass-transfer limitations in solid–liquid catalytic reactions, a microwave-assisted system was developed based on bimetallic CuFe 2 O 4 spinel for peroxymonosulfate (PMS) activation. The catalyst achieved efficient sulfamethoxazole (SMX) degradation with a remarkable rate constant of 0.36 min −1 , representing an approximately 72 times faster rate than the non-microwave CuFe 2 O 4 /PMS system and superior to most reported analogues. Additionally, the microwave-assisted CuFe 2 O 4 /PMS system demonstrated higher efficiency than the PMS-only, Fe 3 O 4 /PMS, and CoFe 2 O 4 /PMS systems, which confirms the crucial role of Cu in the spinel structure. Quenching tests confirmed that superoxide radicals ( • O 2 − ) generated at the catalyst-solution interface played a dominant role. The system exhibited excellent stability and strong anti-interference ability across a wide pH range (3.0–9.0) and against common inorganic anions (Cl − , SO 4 2− , and HCO 3 − ). Under optimized conditions (1 g ·L −1 catalyst dosage and 700 W microwave power), nearly complete SMX removal was achieved within 20 min. XRD and XPS characterization confirmed that the crystal phase and chemical state of the CuFe 2 O 4 catalyst remained stable before and after the reaction. This study presents an efficient, stable approach for removing antibiotics from water and underscores the potential of microwave-enhanced interface catalysis in advanced oxidation processes.
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Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 2
·121376
·
IF 7.2
Wei Ren,Xiao-Wen Huang,Dongmei Hou,Zhuoyuan Li,Jingenqi Li,Denglong Chen,Yuehong Ma,Chongli Wu,Qian-Qian Tang,Yi Hu,Long-Shuai Zhang,Jian-Ping Zou
Advanced oxidation processes (AOPs) based on peracetic acid (PAA) are widely employed for water purification; however, conventional PAA activation methods often exhibit low efficiency in generating hydroxyl radicals (•OH). Herein, a carbon nitride-supported Fe single atom catalyst (Fe-CN) is employed to activate PAA, achieving efficient degradation of 4-chlorophenol (4-CP). Experimental analyses confirmed that •OH is the predominant reactive species responsible for degradation. Density functional theory (DFT) calculations and in-situ Raman spectroscopy revealed that Fe-CN selectively adsorbs peroxy oxygen atoms from PAA, promoting O-O bond cleavage and •OH formation. The system demonstrated robust stability across a wide pH range, resistance to ionic interference, and high efficiency in natural water matrices. This work provides novel insights into •OH-dominated PAA-based AOPs for sustainable wastewater treatment.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 8.3
Qian Gao,Luyu Wang,Yuting Shi,Dandan Liu,Shoufu Yu,Kaikai Zhang,Zhaorui Zhang,Pengcheng Dai,Liangjun Li,Xin Gu,Yunqi Liu
1,5-pentanediol (1,5-PDO) is a valuable petrochemical for producing advanced polyester and polyurethane. The production of bio-1,5-PDO through hydrogenolysis ring-opening of biomass-derived furfuryl alcohol, is an atom-economical and sustainable alternative to reduce the reliance on fossil energy. Acidic metal oxide was always an component in typical non-noble metal catalysts, but the role of acidic sites on support during the precise cleavage of C–O–C bond in furan ring has been overlooked. Herein, a series of model catalysts were synthesized through metal-organic frameworks, designing highly dispersed Al 2 O 3 -modified Co-based model active sites supported on carbon. The modulation of model active sites are favorable to investigate the synergy mechanism of hydrogenation sites and acidic sites originated from metal oxide support in multicomponent transition metal catalyst. Compared with the catalyst without Al 2 O 3 , the optimized 7AlCo@C-500 catalyst could achieve 98.4 % conversion of FFA and 52.5 % selectivity for 1,5-PDO at 160 °C within 3h, exhibiting comparable performance to the typical transition metal catalysts. Based on the characterization, the Al 2 O 3 in Co-based catalyst results in electron transfer through Co–O–Al interaction, forming more oxygen vacancies in CoOx, and offering weak acidic sites, which facilitated the adsorption of FFA and promoted hydrogenolysis efficiency. Besides, the synergetic effect between Co species and Al 2 O 3 promotes hydrogen dissociation and activation of furan ring in FFA, thereby decreasing the activation energy for hydrogenolysis of FFA. Other acidic metal oxide could exhibit similar promotional effect as Al 2 O 3 , fostering the formation of 1,5-PDO. This study investigates the assistant effects of acidic sites in metal oxide by designing model catalysts, aiming to elucidate the role of acidic metal oxides in transition metal catalyst during the selective conversion of biomass-derived FFA to high-value 1,5-PDO.
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ACS Applied Materials & Interfaces
·
2026
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IF 8.2
Zhixuan Ma,Pengxuan Wu,Bingshuang Li,Suhua Mao,Qian Liu,Hailun Xia,Jin Li,Zhen Xu,Xiaoxi Huang
The growing demand for green synthesis of hydrogen peroxide (H2O2) has fueled great interest in electrochemical synthesis via the oxygen reduction reaction (ORR). Carbon-based materials are an appealing class of electrocatalysts, offering the promise of tunable defects, heteroatom dopants, and controllable pore structures. However, increasing the accessibility of mesopores in carbon-based materials is challenging due to the restricted diffusion depth. In this study, we report the synthesis of a mesoporous carbon hollow shell with a big surface opening (C-750) and the nonhollow control material (C-750C). The hollow structure with a big surface opening facilitates rapid diffusion and transport of reactants and products through both its exterior and interior surfaces. This structure enables prompt reactant access to active sites and efficient product desorption, thereby yielding exceptional electrocatalytic ORR performance. In contrast, nonhollow mesoporous carbon materials rely solely on external surface diffusion, resulting in longer transport pathways, restricted accessibility to active sites, and product accumulation that diminishes reaction efficiency. In the rotating ring-disk electrode, C-750 demonstrates a higher diffusion-limited current density and higher H2O2 selectivity than C-750C, highlighting its superior mass transport efficiency due to the hollow structure as well as the large opening on the shell. In the flow cell, C-750 shows an industrial-level current density of ∼ −244 mA cm–2 at 0.28 V vs RHE, and the production rate of H2O2 is over 14.6 mol h–1 gcat–1. The density of edge defects, tailored by changing the carbonization temperature, works synergistically with oxygen dopants to enhance the catalytic performance, as confirmed by both theoretical simulations and experimental results.
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Polymers
·
2026
·Vol. 18
·期 1
·
IF 4.9
Feihua Ye,Fan Chen,Yunhong Zhang,Yunwei Huang,Shasha Liu,Jiangfei Cao,Yanni Wu
Uric acid (UA), a key end-product of human purine metabolism, serves as an important biomarker linked to multiple disorders. This study developed a novel enzyme-free colorimetric sensing platform based on starch-derived nitrogen-doped biochar (NC) for the highly sensitive and selective detection of UA in human body fluids. The NC material with a high specific surface area and abundant nitrogen active sites was prepared via a two-step strategy involving hydrothermal synthesis followed by high-temperature pyrolysis, using starch and urea as raw materials. Under mild conditions, the NC effectively catalyzes dissolved oxygen to produce reactive oxygen species (·O2−and1O2), which oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue-colored oxidation product (TMBox). The presence of UA reduces TMBox to colorless TMB, leading to a measurable decrease in absorbance at 652 nm and enabling quantitative UA detection. Key reaction conditions were systematically optimized. Material characterization and mechanistic investigations confirmed the catalytic performance of the NC. The method demonstrated a wide linear response from 10 to 500 μmol·L−1, with a detection limit of 4.87 μmol·L−1, and demonstrated outstanding selectivity, stability, and reproducibility. Practical application in human serum and urine samples yielded results consistent with clinical reference ranges, and spike-recovery rates ranged from 95.5% to 103.6%, indicating great potential for real-sample analysis.
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 7.7
Hongliang Chen,Nana Lu,Qian Long,Mengbi Yang,Dandan Luo,Zhipeng Wang
A porous composite catalyst, designated as 0.1Co/RM@G, is successfully fabricated with red mud (RM). This catalyst, incorporating CoFe 2 O 4 , Fe 3 O 4 and Na 4 CoO 3 as active species, is employed to activate peroxymonosulfate (PMS) for the methylene blue (MB) degradation in aqueous solutions. The results demonstrate that under optimal conditions: 1 g/L of 0.1Co/RM@G and 10 mM PMS, the removal efficiency of MB (initial concentration: 100 mg/L) achieves up to 99.7 % within 15 min. Radical scavenging experiments combined with electron paramagnetic resonance (EPR) analyses confirm that singlet oxygen ( 1 O 2 ) is the primary reactive oxygen species (ROS) responsible for the MB degradation. A plausible mechanism for PMS activation by 0.1Co/RM@G is proposed, where the synergistic effect between Co 3+ /Co 2+ and Fe 3+ /Fe 2+ redox cycles plays a crucial role in sustaining the high catalytic performance. Furthermore, recycling experiments reveal that the catalyst retains over a 71.3% MB removal efficiency after four cycles, highlighting its strong reusability. Density functional theory (DFT) calculations suggest that the N sites (30, 21) and C sites (13, 6, 15, 11, 2, 4) on the MB molecule are particularly susceptible to attack by 1 O 2 during the oxidation process. The potential pathways for the MB degradation are proposed through intermediates analysis using LC-MS technology. Thanks to its robust catalytic efficiency and excellent recyclability, the 0.1Co/RM@G composite shows a great potential for practical applications in the treatment of MB wastewater.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 21.1
Qi Zhou,Jiale Wang,Jiaojiao Song,Hao Yan,Ruiyan Wang,Tiantian Luo
A mesoporous N-doped carbon bearing atomically dispersed Fe (Fe 1 -N-Cv) was created that uniquely couples carbon-vacancy and pore engineering to switch the electron spin state of highly accessible Fe sites from low-spin (t 2 g 5 e g 0 ) to high-spin (t 2g 3 e g 2 ), thereby unlocking superior Fenton-like activity. The material was synthesized by pyrolyzing Fe-encapsulated ZIFs under negative pressure, whereby the built-in pressure gradient simultaneously enlarged pores and generated carbon vacancies. Fe 1 -N-Cv degrades pollutants 3.89-fold faster than conventional Fe 1 -N-C, maintains > 99 % tetracycline removal and > 95 % mineralization during 240 min of continuous flow operation, operates over a pH range of 3.0–9.0, and shows stable recyclability and strong resistance to coexisting matrix constituents. Mechanistic analysis identifies a non-radical regime dominated by singlet oxygen, assisted by high-valent Fe-oxo and electron-transfer pathways, while DFT calculations show that carbon defects accelerate interfacial charge transfer and lower the free-energy barrier for PMS activation. Synergistic engineering of carbon vacancies and pores thus emerges as a powerful lever to modulate both the geometric accessibility and electronic spin state of single-atom Fe centers, directly translating into markedly enhanced Fenton-like performance. This strategy offers a promising approach for boosting single-atom-catalyst activity and robustness, advancing their practical deployment in continuous environmental remediation technologies.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Danhua Jiao,Ying Li,Runjie Wang,Tianxue Li,Xiaodong Cai,Qizhao Wang
The Photo-Fenton-like reaction offers a novel avenue for the efficient and thorough mineralization of emerging pollutants while is constrained by metal ion leaching and a declination in catalytic performance. This study presented the development of a ZnFe 2 O 4 /NBGA (named as ZFO/NBGA) catalytic system including strategically established Fe-X-C (X = N, B) links and a three-dimensional hierarchical architecture. The Fe-X-C bond functions as a conduit to modulate the charge environment at active sites, and the three-dimensional nitrogen and boron-doped graphene aerogel (noted as NBGA) accelerates charge and ion transfer. Experimental findings demonstrated that the ZFO/NBGA catalytic system achieved 99.5% TC removal activity for PDS activation under visible light irradiation within 50 min. The reaction rate constant (k) reached 9.9 × 10 −2 min −1 , which is 6.6 times higher than that of pure ZnFe 2 O 4 . Additionally, the anti-interference ability in complex water environments was validated. Crucially, the catalyst exhibited exceptional stability and economic sustainability, maintaining 79.89% degradation efficiency after 6 consecutive cycles with negligible metal leaching (Zn < 1.0 mg/L, Fe < 0.3 mg/L). The primary active species were • O 2 − , h + , and 1 O 2 . LSCM evaluated the degradation pathways of contaminants, and the toxicity of the resultant chemicals were examined. DFT calculations elucidated that improved performance resulted from directional electron transport, which prolonged carriers life-time, and the d -band center of ZFO/NBGA, situated closer to the Fermi level, optimized the adsorption and desorption of intermediates. This work may offer novel insights into the mechanisms of metal-based carbon catalysts for the efficient remediation of emerging pollutants, which is essential for the establishment of ecologically sustainable catalytic approaches.
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