Nanomaterials
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2026
·Vol. 16
·期 3
·166
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IF 4.3
Yunfeng Zhang,Cheng Zhao,Zhongqun Li,Dexin Kong,Lingshuai Kong
Peroxymonosulfate (PMS)-based advanced oxidation is often hindered by pH instability and the lack of post-reaction separation. Herein, commercial magnesium hydroxide (Mg(OH)2) is introduced as a multifunctional catalyst to address these limitations. Mg(OH)2effectively catalyzed PMS decomposition via a nonradical pathway dominated by singlet oxygen (1O2) generation, achieving rapid and complete degradation of electron-rich pollutants like bisphenol A (BPA) within 40 min. The system exhibits exceptional pH self-regulation, stabilizing the solution at ~9.8 and maintaining high efficiency across an initial pH range of 3–11. Mechanistic studies confirm1O2as the primary reactive species with a steady-state concentration of 1.67 × 10−12M. The catalyst demonstrates strong resistance to common anions and humic acid, along with excellent stability over four cycles. Furthermore, Mg(OH)2enables in situ flocculation and removal of degradation products. This work highlights Mg(OH)2as an efficient, stable, and multifunctional activator, offering a integrated strategy for practical wastewater treatment.
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WATER SCIENCE AND TECHNOLOGY
·
2026
·Vol. 93
·期 3
·318-331
·
IF 2.6
Wang Hanlin,Chu Ziyang,Li Mengxue,Chen Tianhu
View large Download slide View large Download slide Close modal Pyrrhotite (Fe 1-x S) was prepared by the pyrolysis of pyrite and the sulfidation of hematite, and subsequently used to activate H 2 O 2 for the degradation of tetracycline (TC). The pyrite-derived Fe 1-x S samples (P600 and P700) and the hematite-derived Fe 1-x S samples (S600, S700), prepared at 600 and 700 °C, respectively, were characterized using X-ray diffraction (XRD), X-ray photoelectronic spectroscopy (XRS), scanning electron microscopy (SEM) and magnetism analysis. The effects of annealing temperature, preparation method, and initial solution pH on TC degradation were systematically investigated. The results showed that the degradation of TC increased with the decrease in annealing temperature and initial solution pH. Quenching experiments and electron spin resonance (ESR) demonstrated that • OH and 1 O 2 were reactive oxygen species (ROSs) in acidic and alkaline media, respectively. Moreover, the sulfidation-derived pyrrhotite, featuring a monoclinic Fe 1-x S shell, exhibited superior catalytic performance than pyrolysis-derived pyrrhotite with a hexagonal Fe 1-x S shell. Notably, 1 O 2 was easier to produce in the P600/H 2 O 2 system. Both P600 and S600 maintained a high catalytic activity after five runs. These findings offer a novel approach for pyrrhotite preparation and promote the comprehensive utilization of pyrite and hematite. Pyrolytic pyrrhotite and sulfurized pyrrhotite were prepared by a one-step method. Sulfurized pyrrhotite exhibited superior catalytic activity than pyrolytic pyrrhotite. • OH was the dominant ROS under acidic conditions, while 1 O 2 prevailed under alkaline conditions. The magnetic pyrrhotite showed excellent reusability over five cycles.
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DYES AND PIGMENTS
·
2026
·
IF 3.9
Zhiling Qiu,Ziyi Yan,Zhangjian Qian,Huimin Zhang,Yucheng Pan,Nan Jiang,Shangyun Wang,Li Na,Xin Xiao
A facile one-pot synthesis of g-C 3 N 4 /ZnO heterojunctions is reported for water remediation. The optimal composite (3:7 mass ratio) achieves enhanced visible-light degradation of methylene blue (k = 0.02033 min -1 ), attributed to interfacial charge separation rather than adsorption, as evidenced by PL and photocurrent measurements. Radical trapping and LC-MS identify •OH and h + as dominant species and reveal a stepwise demethylation degradation pathway. DFT calculations verify a type-II band alignment with a built-in electric field that thermodynamically drives carrier separation. The composite maintains excellent stability over multiple cycles, highlighting its potential for practical photocatalytic applications.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2026
·
IF 9.2
Congcong Zhang,Mei Hong,Bi Zhao,Yunhang Jin,Jiafeng Zhu,Benying Liu,Xiaojian Zhou,Yin Zhang
The development of sustainable and efficient systems for the complete degradation of organic pollutants under mild conditions remains a major environmental challenge. Conventional Fenton systems often rely on externally supplied H 2 O 2 , which introduces storage and transport risks as well as additional operational costs. In this work, a polypyrrole-decorated resorcinol-formaldehyde microsphere (PPy/RF) photocatalyst was rationally constructed via in-situ oxidative polymerization to integrate photocatalytic H 2 O 2 generation and photo-Fenton oxidation within a single platform. The donor-acceptor (D-A) interfacial structure formed between PPy and RF effectively broadens visible-light absorption, accelerates charge transfer, and facilitates efficient in-situ H 2 O 2 formation. More importantly, the generated H 2 O 2 directly participates in the photo-Fenton process with Fe 3+ /Fe 2+ redox cycling, leading to the continuous generation of highly reactive hydroxyl radicals (·OH) and superoxide radicals (·O 2 − ). Under visible-light irradiation, the optimized PPy/RF-0.07 exhibited a markedly enhanced H 2 O 2 production rate (727.56 μM h −1 ) due to the D-A interfacial structure between RF and PPy promotes oxygen reduction reaction (ORR) and water oxidation reaction (WOR). Subsequently, it achieved an outstanding degradation efficiency (>99%) toward phenol, dyes, and antibiotics, outperforming conventional systems that require external H 2 O 2 dosing. This superior performance originates from the synergistic effects of enhanced interfacial charge separation, in-situ H 2 O 2 self-supply, and photo-Fenton-driven radical oxidation. This work demonstrates a self-sustaining photo-Fenton-like system that eliminates the dependence on external oxidants, offering a new insight for solar-driven advanced oxidation processes and sustainable wastewater treatment.
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Yanhua Liu,Yunpeng Luo,Geoffrey I.N. Waterhouse,Zhiming Zhang,Liangmin Yu
The rational design of charge-transfer interfaces is essential for high-performance photoelectrocatalytic (PEC) wastewater remediation. Herein, a novel ternary n-n-p heterojunction electrode, titanium dioxide/NH 2 -MIL-125(titanium)/polyaniline (TiO 2 /Ti-MOF/PANI), was successfully fabricated via a two-step hydrothermal and chemical polymerization strategy, followed by electrophoretic deposition. The optimized electrode exhibited a superior Rhodamine B (RhB) degradation efficiency of 96.1% and a total organic carbon mineralization rate of 67.19% within 70 min under visible light with a −0.8 V bias, significantly outperforming the individual photocatalytic and electrocatalytic processes. The superior performance originates from the synergistic integration of the ternary components. Ti-MOF and PANI broaden the visible-light response, promoting the generation of photogenerated electron-hole pairs under visible-light irradiation. Within this heterostructure, PANI functions as a narrow-band-gap sensitizer and p-type hole-transport layer, while n-type Ti-MOF provides a continuous pathway for rapid interfacial charge transfer. Meanwhile, n-type TiO 2 serves as a robust electron-transport backbone and offers stable surface active sites for subsequent redox reactions. The resulting n-n-p heterojunction establishes an internal electric field that, in conjunction with the applied negative bias, accelerates charge-carrier migration and accumulation at the electrode surface, thereby facilitating RhB degradation. Furthermore, PANI acts as an efficient conductive bridge, shortening electron-transport distances and reducing interfacial resistance. Mechanistic insights from radical trapping and electron spin resonance analysis confirm that •O 2 − and •OH are the predominant reactive species driving the oxidative cleavage of the xanthene chromophore. Overall, this work provides valuable design principles for multi-component PEC electrodes, offering insights into efficient environmental remediation.
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JOURNAL OF NANOPARTICLE RESEARCH
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2026
·Vol. 28
·期 2
·48
·
IF 3.5
Li Mengxue,Wen Jiamin,Li Tianyu,Liu Yuqin
MgFe 2 O 4 spinel ferrites have attracted increasing interest as magnetically recyclable photocatalysts owing to their narrow bandgap (~ 1.9 eV) and structural robustness; however, their photocatalytic efficiency is often limited by rapid charge‐carrier recombination. In this work, Mg 1-x Zn x Fe 2 O 4 (x = 0–0.15) photocatalysts were synthesized via co-precipitation route, and the combined effects of Zn 2+ doping and calcination temperature (700–900℃) on their structural, optical, and photocatalytic properties were systematically investigated using a full factorial experimental design. XRD and TEM analyses confirm the successful incorporation of Zn 2+ into the spinel lattice without secondary phase formation, accompanied by enhanced crystallinity at elevated calcination temperatures. UV–Vis diffuse reflectance spectra reveal a modest enhancement of visible-light absorption (600–800 nm) with increasing Zn 2+ content, while the fundamental bandgap slightly widens from 1.88 eV (undoped) to 1.95–1.98 eV upon Zn 2+ substitution. Photocatalytic degradation of methylene blue under UV irradiation demonstrates a distinct global performance maximum at x = 0.10 and 800 °C, yielding a degradation efficiency of 97.23% and an apparent rate constant of 0.0402 min⁻ 1 , which is ~ 1.56 times higher than that of undoped MgFe 2 O 4 under identical conditions. Radical scavenging experiments indicate that hydroxyl radicals are the dominant reactive species, predominantly generated via electron-mediated oxygen reduction pathways. The observed enhancement arises from a non-additive, synergistic interaction between Zn 2+ -induced electronic modulation and temperature-controlled crystallinity, rather than from surface area or bandgap narrowing alone. This study provides quantitative evidence for synergistic optimization in doped spinel ferrites and offers guidance for the rational design of efficient, recyclable magnetic photocatalysts.
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Applied Materials Today
·
2026
·
IF 7
Ying Zhang,Yong Cui,Hui Zhou,Lixuan Zhang,Chao Wang
Innovative platforms integrating real-time point-of-care testing (POCT) with condition-adaptive therapy are urgently required for intelligent theranostics in microbially infected wounds. To address this dual challenge, we engineered a bilayer, stimuli-responsive, multifunctional self-healing hydrogel. The hydrogel is composed of polyvinyl alcohol (PVA), dextran (Dex) and borax, which enables rapid self-healing Encapsulating pH-responsive borax/tannic acid (BT) complexes and bromothymol blue (BTB) dye within the hydrogel, the POCT layer affords a visible colorimetric response within a pH detection range of 5.5–8.5. This sensitivity enables the correlation of pH changes with the concentration of five common pathogens, facilitating in situ , real-time evaluation of wound infection progression. By incorporating CaO 2 nanoparticles and FeS 2 nanozymes into the hydrogel, the therapeutic layer is obtained. Activated by the acidic microenvironment of infection, it generates H 2 O 2 to various reactive oxygen species (ROS). ROS is integrated with inherent photothermal property to achieve synergistic antibacterial therapy, achieving nearly 100% sterilization rate against Escherichia coli and M. luteus . In the post-infection phase, the composite hydrogel exhibits self-awareness of the wound microenvironment. The hydrogel initiates self-driven O 2 release to relieve oxidative stress and accelerate wound healing. In vivo experiments, the multifunctional hydrogel resulted in 89.03% wound healing rate in MRSA -infected wounds. This smart design not only enables timely POCT and treatment of infected wounds but also facilitates adaptive modification of therapeutic protocols in accordance with the severity of the infection. The highly adaptive hydrogels are anticipated to provide a novel approach with great potential for designing intelligent theranostic platforms, enabling real-time monitoring of infection degree, efficient antimicrobial therapy, and promotion of wound recovery.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Chen Wang,Meiyi Li,Maoning Xu,Ye Li,Quanqi Yang,Wanjing Jia,Jianjun Wang
Herein, phosphorylated MOF@COF (UiO-66-NH 2 @HDU-27-P) Type-II heterostructures were constructed to achieve selective and efficient uranium extraction. These composites were synthesized via the covalent linking of MOFs with COFs at varying ratios, and their electronic properties were analyzed using density functional theory (DFT) calculations. The optimized 6:1 composite exhibited exceptional performance, achieving (> 92.9 %) U(VI) removal in pure water and maintaining high efficiency across complex aqueous environments, including seawater. Mechanistic studies revealed that the Type-II heterojunction significantly enhances charge separation, enabling uranium capture through synergistic adsorption, photocatalytic reduction, and immobilization under non-sacrificial air conditions. This work provides a new paradigm for designing high-performance heterojunctions, offering a superior alternative to current materials for sustainable environmental remediation and uranium recovery.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2026
·
IF 3.6
Lin Zhou,Zhanghong Guo,Haining Cui,Jinxin Ma,Chan Wang,Qijun Song
Direct transformation of biomass-derived platform compound 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) represents a highly attractive route with significant environmental and economic benefits. The nanozymes with oxidase-like (OXD-like) activity hold great promise for the green oxidation of HMF to FDCA. Herein, an iridium-coated γ-Fe 2 O 3 core-shell nanozyme (γ-Fe 2 O 3 @Ir) was prepared by the reduction of Ir 3+ with glycerol on the surface of γ-Fe 2 O 3, and the structure of the γ-Fe 2 O 3 @Ir nanozyme was confirmed by XRD, HAADF-STEM image, and elemental line-scan analyses results. The magnetic property of the nanozyme not only facilitates its recovery but also effectively enhances its affinity to oxygen. By employing γ-Fe 2 O 3 @Ir nanozyme as the catalyst and atmospheric oxygen as a green oxidant, a near-quantitative conversion (98.5%) of molar level HMF to FDCA was achieved.
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Li Zeng,Hanbin Wu,Yiyang Xu,J. Paul Chen,Yiqiao Xie,Yang Yu
The efficient treatment of dye-containing wastewater remains a critical environmental issue, primarily due to its biological toxicity to aquatic microorganisms and high chromaticity. In this work, two types of Co₃O₄-functionalized ceramic hollow fiber membranes were designed to activate peroxymonosulfate (PMS) for the efficient removal of dyes from water. Compared to the static-deposited membrane (SCHFM), the dynamic-deposited membrane (DCHFM) demonstrated a higher loading capacity and more uniform distribution of Co 3 O 4 on both the surface and internal pores, leading to a significant enhancement in catalytic performance. Under optimal operating parameters, the DCHFM achieved over 98% removal of rhodamine B (RhB) during the filtration. Radical quenching and electron paramagnetic resonance (EPR) confirmed the involvement of multiple reactive oxygen species, including singlet oxygen ( 1 O 2 ), hydroxyl radical (HO•), sulfate radical (SO 4 •− ) and superoxide radical (•O 2 − ), with 1 O₂ identified as the predominant reactive species. Furthermore, the functionalized membrane exhibited outstanding operational stability and reusability with negligible cobalt leaching. The findings of this study provide a high-performance catalytic membrane system for the advanced purification of industrial wastewater.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2026
·
IF 3.3
Meng Fanyuhe,Wang Siying,Li Mengtong,Tian Anyao,Dong Lin,Yu Hongmei
Basic Fuchsin (BF), a recalcitrant organic dye, poses severe risks to aquatic ecosystems and human health, necessitating the development of efficient and stable environmental remediation technologies. Herein, a novel direct S-scheme heterojunction photocatalyst (MG-CQDs/TiO 2 ) was prepared by impregnating and calcining TiO 2 with mango peel-derived carbon quantum dots (MG-CQDs). The successful construction of the S-scheme charge-transfer heterostructure was systematically elucidated through band structure analysis and electron paramagnetic resonance (EPR) spectroscopy. Under ultraviolet–visible (UV–Vis) light irradiation, the MG-CQDs/TiO 2 composite exhibited exceptional photocatalytic performance, achieving a remarkable BF degradation efficiency of 96.5% within 180 min. Notably, its reaction rate constant was 2.1 times higher than that of pristine TiO 2 . Mechanistically, the synergistic interaction between MG-CQDs and TiO 2 significantly promotes the spatial separation of photogenerated carriers. Radical trapping experiments further confirmed that superoxide (·O 2 − ) and hydroxyl (·OH) radicals serve as the primary reactive oxygen species driving the oxidation process. Crucially, density functional theory (DFT) calculations combined with Fukui index analyses provided molecular-level insights into the degradation pathway, identifying the nitrogen atoms and the central carbon of the BF molecule as the preferential sites for radical attack. Furthermore, the composite demonstrated outstanding photostability, maintaining highly efficient degradation over multiple consecutive cycles. Supported by both macroscopic experimental evidence and microscopic theoretical calculations, this study presents a highly efficient, cost-effective, and green paradigm for the advanced treatment of industrial dye wastewater. Graphical abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Ying Zhang,Ruohan Li,Wenying Sun,Wei Mao,Yibing Li,Lixun Zhang,Yuntao Guan
The pervasive contamination of tetrabromobisphenol A (TBBPA) presents a critical environmental challenge due to its persistence and resistance to conventional degradation. Although sulfidized nanoscale zero-valent iron (S-nZVI) represents a promising remediation avenue, its efficacy is severely constrained by particle agglomeration and insufficient mineralization capabilities. Here, we report a self-dissociation-assembly strategy to engineer a robust S-nZVI composite supported on Mg Al layered double oxides (S-nZVI@LDO) for the substantial removal of TBBPA. By modulating the precursor synthesis pathways, we demonstrate that the hydrothermal-derived LDO support (α-phase) creates a unique nanosheet architecture that facilitates superior dispersion of reactive Fe/S species compared to chemically precipitated counterparts. The optimized S-nZVI@LDO α composite achieves >95% TBBPA removal efficiency, with a debromination efficiency of 71% and a mineralization rate of 51%, significantly outperforming traditional composites. Mechanistic investigations reveal a synergistic pathway involving rapid electrostatic adsorption, reductive debromination driven by surface-bound Fe 0 , and oxidative mineralization via in-situ generated radicals. Furthermore, the catalyst exhibits improved stability and reusability over multiple cycles. This work elucidates the critical role of precursor structural evolution in catalyst design and provides a scalable, high-efficiency solution for the remediation of halogenated organic pollutants.
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