COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Zhaolei Zhang,Fengyan Fang,Pingping Zhang,Xiaokang Zhang,Hongchao Ma,Yanhui Wei
Efficient detection of 4- nitrophenol (4-NP) organic pollutant is always a very important issue due to the rapid development of chemical industry and the abuse of pesticides and so on. Here, we designed and synthesized a novel supramolecular fluorescent probe , 4-[4-(acetylamino)styryl]-1-cyclodextrin pyridinium p-toluenesulfonate (ASPT-β-CD), for the selective and sensitive detection of 4-NP. The introduction of β-CD not only improves the water solubility of probe and can also be used as a host to encapsulate 4-NP. In alkaline aqueous solution, the absorption spectrum of 4-NP overlaps the excitation spectrum of ASPT-β-CD and suggests that an internal filtration effect occurs between them. We explored the possible response mechanism and speculated that the high selectivity and high sensitivity were derived from the synergistic effect of inner filtering effect and host-guest interaction. Benefiting from the synergistic effect, the proposed sensor ASPT-β-CD displayed significant "turn-off" after adding 4-NP, while showing a fast response to 4-NP within 2 min and low LOD about 0.01 μM. In addition, this method has been successfully applied to the determination of 4-NP in lake water samples, indicating that the obtained ASPT-β-CD has great practical application potential in the environmental field.
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高影响因子
FUEL
·
2025
·
IF 7.5
Xianjie Wang,Long Yan,Yufei Wang,Shuaige Shi,Jian Li,Xiaoyong Fan
The production of semi-coke via low- and medium-temperature coal pyrolysis offers a promising avenue for coal utilization, yet the resultant wastewater poses significant treatment challenges due to its complex pollutants. This study introduces an innovative approach that shifts from “treatment” to “conversion,” utilizing phenolic substances and ammonium compounds in the wastewater to synthesize thermosetting phenolic resin (PR) and porous carbon (PC). These were activated with potassium hydroxide (KOH), yielding high-performance PC. Using response surface methodology (RSM), optimal conditions were identified: a KOH to PR ratio of 2.798:1, temperature of 816.43 °C, and duration of 1.22 h, achieving maximum iodine adsorption of 1457.22 mg/g. Thermal analysis and kinetic studies showed easier activation of PRs than methenamine, with mixed phenol-derived resins having the lowest activation energy. The pore structure analysis revealed that catechol, 2,3-dimethylphenol, and 2,6-dimethylphenol generated substantial mesopore and micropore volumes, whereas phenol and m-cresol primarily formed large pores. Ammonia addition rendered the PC pores round and regular. This research establishes a theoretical basis for transforming semi-coking wastewater into valuable resources and synthesizing advanced PC materials.
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Journal of the American Chemical Society
·
2026
·Vol. 148
·期 29
·31487-31497
·
IF 16.6
Yu Haoran,Yang Xinrui,Chu Longgang,Wang Ruobing,Sun Zhaoyue,Gao Juan,Vione Davide,Wu Bing,Ren Hongqiang,Zhu Chongqin,Francisco Joseph S.,Gu Cheng
While
phenolic compounds are recognized as key atmospheric precursors
of brown carbon (BrC), the mechanisms governing their interfacial
transformation into BrC aerosols, particularly at the microdroplet
air–water interface (AWI), remain incompletely characterized.
This study investigated the photolysis of phenolic compounds in microdroplets
under UV irradiation, revealing a transformation efficiency 2 orders
of magnitude higher than that in bulk solutions. Through integrated
Fourier transform ion cyclotron resonance mass spectrometry, liquid
chromatography–mass spectrometry, and fluorescence excitation–emission
matrix spectrum, we identified interfacial-confined oligomerization
as the dominant pathway generating BrC with oligomer characteristics.
Multiscale theoretical simulations unveiled that the AWI functions
as a key mediator through a synergistic mechanism: it not only drives
the spontaneous accumulation of phenols at the interface, but also
enhances their photon absorption efficiency via asymmetric interfacial
H-π hydrogen bonding, as evidenced by a critical 24.7% increase
in the molar extinction coefficient at 298 nm. Together, these dual
effects synergistically facilitate photon capture and subsequent phenoxy
radical generation. Our results establish the AWI as photochemical
nanoreactors that fundamentally alter atmospheric BrC formation kinetics,
providing a mechanistic framework to reconcile field observations
of rapid aerosol aging under humid conditions, while challenging current
model assumptions about phenolic transformation time scales.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Chunhui Wang,Chenfei Zhang,Yixin Xing,Baoying Si,Xian Zhang,Can He,Huijiao Wang,Jianbing Wang
The Practical application of nanobubbles and catalysts in the ozonation of pollutants has been severely hindered by the difficulty of developing efficient reactors where efficiency is controlled by interactions among multiphase flow, mass transfer, and chemical reactions. Due to the complexity of these interactions, accurately describing them remains a significant challenge. In this study, a computational fluid dynamics (CFD) coupled machine learning (ML) model was developed to design and optimize an integrated reactor for nanobubble-enhanced ozone dissolution and catalytic oxidation. Simulation results indicate that the aeration device effectively increases the nanobubble fraction from ∼16% to 60%, thereby significantly accelerating and enhancing ozone mass transfer from the gas to the liquid phase. The integrated reactor of ozone nanobubbles with catalytic oxidation was utilized for the treatment of phenol solution. Both experimental and simulation results show that phenol and its ozone-reactive degradation intermediates (e.g., p-benzoquinone) can be rapidly abated at the first ozone nanobubbles oxidation section, while for the ozone-refractory species (e.g., formic acid and oxalic acid), they can be effectively oxidized at the second catalytic oxidation section. Finally, the optimal structural parameters and operating conditions for the integrated reactor were obtained by an ML model, which achieved >90% TOC removal and > 98% ozone utilization efficiency. Overall, the results of this study demonstrate that CFD simulation coupled with ML provides a feasible and convenient way for design, optimization, and reaction mechanism elucidation of the nanobubble-enhanced catalytic ozonation reactors, laying a foundation for efficient application of catalytic ozonation processes.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Yifei Liu,Defa Liu,Ying Yu,Zumin Wang,Ruziev Umidjon Abdimajitovich,Donaev Sardor Burkhanovich,Semencha Alexander Vyacheslavovich,Lei Wang,Lingbo Zong,Bin Li,Xufang Qian
Fe-Cu dual-atom sites were prepared through pre-coordination and ultrafast Joule heating. • FeCu-N-MCS displays a large E 1/2 , low H 2 O 2 yield and excellent stability. • FeCu-N-MCS suppresses H 2 O 2 accumulation through hydrogen peroxide reduction reaction (HPRR). • Cooperative interaction of dual-atom sites reduces the energy barrier of OH* desorption for 4e⁻ ORR. • Zn-air batteries achieve ultrahigh power density and remarkable charge/discharge stability. The oxygen reduction reaction (ORR) governs the power output and cycling lifetime of metal-air batteries. Fe-N-C single-atom catalysts are among the most promising precious-metal-free ORR electrocatalysts, but their durability is often compromised by H 2 O 2 generated through the competing two-electron ORR pathway, which can trigger Fenton reactions and radical-induced catalyst degradation. Herein, Fe-Cu dual-atom sites anchored on microporous carbon spheres (FeCu-N-MCS) are constructed through a pre-coordination strategy followed by rapid Joule heating. Combined experimental results and density functional theory (DFT) calculations reveal that the electronic coupling between Fe and Cu sites lowers the energy barrier of the rate-determining step for the four-electron ORR pathway. More importantly, the Fe-Cu dual-site configuration enables spontaneous hydrogen peroxide reduction reaction (HPRR) at Fe sites and significantly facilitates OH* desorption during HPRR, thereby suppressing H 2 O 2 accumulation and alleviating Fenton-type oxidative degradation. Consequently, FeCu-N-MCS delivers outstanding ORR performance with a half-wave potential of 0.91 V, a low H 2 O 2 yield below 2.91%, and 91.05% current retention after 100 h. Aqueous Zn-air batteries (A-ZABs) assembled with FeCu-N-MCS achieve a peak power density of 223.73 mW cm −2 and stable cycling for over 1200 h. FeCu-N-MCS-based Quasi-solid-state ZABs (QSS-ZABs) further exhibit an open-circuit voltage (OCV) of 1.52 V and a power density of 246.85 mW cm −2 . This work establishes a dual-atom-site strategy for coupling high ORR activity with H 2 O 2 -resistant durability, offering mechanistic insight into the design of robust precious-metal-free electrocatalysts for advanced metal-air batteries. Download: Download high-res image (220KB) Download: Download full-size image Fe-Cu dual-atom sites were prepared through pre-coordination and Joule heating. The incorporation of Cu sites into Fe-N-MCS not only reduces the energy barrier of the rate-determining step (RDS) to accelerate the 4e⁻ ORR pathway, but also enables spontaneous hydrogen peroxide reduction reaction (HPRR) to suppress H 2 O 2 accumulation and Fenton corrosion. Consequently, the assembled Zn-air batteries achieve remarkable power density and ultra-long cycling stability.
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WATER RESEARCH
·
2026
·
IF 12.8
Jun Huang,Fan Chen,Zimeng Zhang,Yunxia Zu,Di Cao,Tianyi Huang,Zhiling Li,Aijie Wang
Chlorinated and non-chlorinated aromatic contaminants frequently co-occur in groundwater, but their synergistic bioremediation is often hindered by conflicting redox requirements, microbial niche competition, and the need for external organic carbon sources. Here, we present an electro-stimulated bio-circulation well (ES-BCW) that couples electrode-mediated redox regulation with internal hydraulic recirculation, enabling the simultaneous continuous reductive dechlorination and oxidative aromatic degradation without exogenous organic carbon supplementation. Under continuous operation (120 d), the ES-BCW system achieved average removal rates of 53.2 µmol L −1 d −1 for 1,2,4-trichlorobenzene (1,2,4-TCB) and 169.5 µmol L −1 d −1 for toluene, respectively, demonstrating competitive performance for anaerobic co-treatment of mixed aromatic contaminants. Optimal weak electrical stimulation (1.2 V) with a controlled reflux (50%) promoted spatial niche differentiation between cathodic reductive and anodic oxidative zones. Microbial analysis revealed selective enrichment of dechlorinating ( Dechloromonas and Sphingobium ), toluene-degrading ( Azoarcus and Thauera ), and electroactive ( Geobacter and Sulfurospirillum ) genera. Integrated metagenomic and metabolomic analyses revealed coordinated enrichment of dechlorination ( pcpB, pcpC ) and toluene oxidation ( bssABC, bbsG ) genes, coupled with increased abundances of energy carriers and key electron transfer components (i.e. cytochromes). These shifts collectively supported enhanced electron flux redistribution, metabolic synergy, and sustained acetate cycling, establishing a self-amplifying loop of endogenous carbon reuse that enabled redox partitioning between cathodic reductive and anodic oxidative niches. The ES-BCW system offers an endogenous carbon-driven strategy for synergistic bioremediation of mixed aromatic contaminated oligotrophic groundwater.
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高影响因子
Foods
·
2026
·Vol. 15
·期 15
·2704
·
IF 6
Weiqian Wang,Jia Liu,Muhammad Aaqil,Siyu Zhou,Xinyu Wei,Linyu Li,Zengzeng Chen,Jun Sheng,Yang Tian,Cunchao Zhao
Gastrodia elata Bl. (GE), a representative medicine–food homology material, requires appropriate processing prior to food application to meet established medicinal quality standards. However, the effects of different traditional processing methods on its quality attributes remain insufficiently elucidated. In this study, three representative processing methods, steaming, moistening, and bran-frying, were systematically compared to evaluate their impact on the structural, compositional, and flavor characteristics of GE. The results demonstrated that processing markedly altered both the physical structure and chemical composition of GE. Moistening caused minimal disruption to the native tissue architecture and largely preserved the free-water distribution pattern. Notably, gastrodin and p-hydroxybenzyl alcohol contents reached 0.38% and 4.16%, respectively, the highest among all treatments, while the overall flavor profile remained closest to that of fresh GE. In contrast, bran-frying induced pronounced dehydration and structural densification, with volatile compounds and differential metabolites accounting for 72.83% and 41.01%, respectively. This treatment also exhibited elevated levels of total phenolics, flavonoids, and protein. Steaming, by comparison, promoted starch gelatinization and water redistribution, shifting the flavor profile from a delicate herbal note toward enhanced umami, floral, and mildly roasted characteristics. Overall, these findings reveal that processing-induced structural remodeling and changes in water state play critical roles in regulating the quality attributes of GE. By integrating structural characterization, water-state analysis, and multi-omics data, this study provides a systematic understanding of the formation of GE quality attributes under different processing methods, offering a theoretical basis for quality control and process optimization.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Jie Ding,Jing Zhang,Boxia Liu,Yuyu Wang,Dongxu Han,Yeqiong Huang,Chuhan Xing,Zhi Song
MnFe-O activates PMS to remove 99.34% phenol within 30 min. • Oxygen vacancies regulate Mn-Fe dual-site electronic coupling. • MnFe-O shows higher Fe 2+ and Mn 3+ contents for rapid redox cycling. • O 2 •− / 1 O 2 -coupled pathways dominate phenol oxidation in MnFe-O/PMS. • MnFe-O/PMS maintains high activity in diverse real water matrices. Peroxymonosulfate (PMS) activation technology has significant application potential in the removal of phenolic pollutants, but its catalytic performance is still limited by problems such as insufficient regulation of the electronic structure of active sites and unclear interfacial reaction pathways. This study used MnFe Prussian blue analogue (MnFe-PBA) as a precursor to construct a series of MnFe-X (X = O, S, Se) catalysts through thermal conversion and oxygen vacancy-related defect engineering, and systematically compared the effects of different vacancy types on the PMS-activated degradation performance of phenol. The results showed that the MnFe-O sample, which was jointly regulated by oxygen vacancy-related defects and structural reconstruction, exhibited the best catalytic activity, achieving 99.34% phenol removal within 30 min, with an apparent rate constant as high as 0.20 min −1 , which was significantly better than the MnFe-PBA and S/Se vacancy-regulated samples. XPS analysis showed that the increased proportions of Fe 2+ (77.25%) and Mn 3+ (70.00%) in MnFe-O created a more favorable local electronic environment for electron coupling and redox cycles. EPR and quenching results indicate that •OH, SO 4 •− , O 2 •− and 1 O 2 are generated simultaneously in the system, and an oxidation pathway dominated by O 2 •− / 1 O 2 coupling is ultimately formed. This work reveals the key role of oxygen vacancy-related defects and structural reconstruction in jointly regulating the activation of PMS by Mn-Fe dual sites, providing a new mechanistic basis for defect engineering-driven bimetallic catalyst design and efficient purification of phenolic wastewater. Download: Download high-res image (230KB) Download: Download full-size image
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Journal of Environmental Sciences
·
2026
·
IF 6.5
Hongxin Liu,Kuiling Li,Lin Fang,Yang Yao,Zhigang Dan,Jun Wang
A heterogeneous electro-Fenton membrane distillation system is developed;. • Interfacial ·OH generation suppresses vapor-phase transfer of VOCs;. • High-salinity wastewater can be concentrated with controlled organic risk. High-salinity coal-chemical wastewater is challenging to manage because thermal concentration reduces wastewater volume but may simultaneously promote the carryover of volatile organics into the distillate and the enrichment of organics in the concentrating brine, thereby amplifying downstream risks. Here we develop a heterogeneous electro-Fenton membrane distillation (HEF-MD) process by integrating a Fe 3 O 4 -loaded membrane-based gas diffusion electrode (Fe 3 O 4 /Mem-GDE). This design couples oxygen delivery, in situ H 2 O 2 electro-generation, and surface-confined Fenton activation at the membrane-solution interface to establish an interfacial “reactive barrier”. Consequently, HEF-MD effectively suppresses vapor-phase transfer of representative volatile phenolics, achieving high rejection under conditions where conventional sweeping-gas MD exhibits low rejection or even enrichment of these compounds in the permeate. When applied to two real coal-chemical wastewaters, HEF-MD maintains stable vapor transport and high salt rejection while substantially improving distillate organic quality and mitigating organic build-up in the concentration brine, supporting a zero-liquid discharge operation. The system operates without chemical dosing or pH adjustment; when waste heat is available to drive MD, the incremental operating cost is dominated by electricity. Overall, these findings position HEF-MD as a practical, risk-controlled concentration strategy that couples desalination with in situ interfacial oxidation to suppress organic transfer, mitigate organic enrichment, and enable sustainable management of high-salinity industrial wastewaters. Download: Download high-res image (274KB) Download: Download full-size image
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Surfaces and Interfaces
·
2026
·
IF 6
Huan Song,Le Song,Fangzhou Wu,Yonglei Xing,Xiaoyong Jin,Fang Wan,Gang Ni
Non-metal doping provides a route to tune metal sites in carbon catalysts for peroxymonosulfate (PMS) activation. Here, a phosphorus-modified N-doped carbon catalyst with an ultralow cobalt loading (Co2-P1-NC; 0.14 wt% Co) was prepared. Under optimized conditions, the Co2-P1-NC/PMS system removed phenol (Ph) within 2.5 min, with an apparent pseudo-first-order rate constant of 2.068 min −1 . Co-free NC and P-NC showed only limited activity, indicating that Co-containing sites account for most of the catalytic enhancement. Quenching tests, electron paramagnetic resonance (EPR), PMSO probing, in situ Raman spectroscopy, electrochemical measurements, and premixing experiments collectively support the coexistence of radical and nonradical routes, with high-valent Co species and interfacial electron transfer making major contributions under the tested conditions. Density functional theory calculations using representative CoN 4 and CoN 3 P models showed that P substitution made PMS adsorption more favorable (from −2.56 to −3.38 eV), whereas the calculated O–O bond length and Bader charge changed only slightly; the adsorption enhancement is therefore attributed mainly to altered geometry and interfacial electronic interactions. P modification also reduced the measured Co leaching concentration from 0.016 to 0.005 mg L −1 . The catalyst rapidly removed several phenolic pollutants, although activity declined during reuse and was inhibited by carbonate and humic acid. These results demonstrate a promising low-Co catalyst design while identifying stability and water-matrix effects as priorities for further development. Download: Download high-res image (308KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123882
·
IF 7.5
Weilong Wu,Chao Li,Yi Wang,Xun Hu
Pyrolysis and activation are common methods for preparing biochar adsorbents, but these treatments often increase porosity while destroying oxygen-containing functional groups that are important for pollutant binding. In this work, a non-carbonized strategy was developed to regulate biomass surface chemistry using camphor wood. Instead of thermal treatment, lignin was removed and the material was modified with tannic acid (TA) and Fe 3 + to construct adsorption sites. The degreasing–oxidation process removed lignin and hemicellulose, exposing cellulose surfaces rich in -OH. TA and Fe 3+ further introduced polar and coordination-active sites. Structural characterization showed that lignin removal triggered hydrogen‑bond rearrangement accompanied by pore contraction, which critically governed the subsequent adsorption behavior. These interfacial changes strongly affected adsorption behavior. Raw camphor showed almost no adsorption toward methylene blue because of the inaccessible functional groups. Fe-modified samples displayed limited adsorption due to site occupation by coordination. Oxidized camphor exhibited improved adsorption because more −OH and −COOH groups were exposed. TA modification alone produced only slight enhancement because of pore restriction and hydrogen-bond competition. In contrast, TA/Fe-modified oxidized camphor achieved the highest adsorption capacity of 312.07 mg/g, higher than oxidized camphor (164.09 mg/g). The improvement mainly resulted from the synergistic effect of exposed -OH, -COOH, and partially coordinated Fe 3+ sites. The material also maintained more than 80% of its initial adsorption capacity after five cycles. Overall, this work shows that adsorption enhancement mainly comes from interfacial reconstruction rather than pore development, providing a simple route for preparing biomass-based functional adsorbents.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yujie Xiao,Zhenxi Liu,Litong Yu,Xiaofeng Lv,Juan Du,Baozhan Zheng,Yong Guo
A stable B, N-CDs@SiO 2 RTP composite was constructed via silica confinement. • The composite shows blue fluorescence and green phosphorescence with 15 s afterglow. • A UV–Vis/fluorescence/phosphorescence tri-mode platform was developed for TNP sensing. • Portable RTP-foam enables visual and semi-quantitative on-site TNP detection. The development of optical probes with multimodal responses is of great significance for improving the reliability of hazardous pollutant detection. Herein, a room-temperature phosphorescent (RTP) composite based on B/N co-doped carbon dots (B/N-CDs) confined within a SiO 2 ) matrix (B/N-CDs@SiO 2 ) was developed for the tri-mode detection of 2,4,6-trinitrophenol (TNP). B/N-CDs@SiO 2 exhibited blue fluorescence at 450 nm and green phosphorescence at 520 nm, with an average phosphorescence lifetime of 1.91 s and a visible afterglow lasting approximately 15 s, together with satisfactory optical stability. Interestingly, B/N-CDs@SiO 2 exhibits excellent response to TNP in both UV–vis absorption, fluorescence, and phosphorescence, thereby establishing a tri-mode sensing platform for TNP detection with detection limits of 1.81 μM, 0.32 μM, and 0.54 μM, respectively. The probe also demonstrates high selectivity for TNP over common ions and structurally related aromatic compounds, along with strong anti-interference capability. In spiked recovery tests in kinds of real samples, the satisfactory recoveries ranging from 91.2% to 108.9% (RSD: 0.34% to 3.74%) demonstrating its higher detection accuracy. Finally, the composite can be immobilized onto polyurethane foam to construct a portable visual sensing platform, which also successfully enabled the tri-mode and semi-quantitative detection of TNP. This work opens up a new avenue for the development of multi-signal detection systems for expanding their practical applications. Schematic illustration of the synthesis of B/N-CDs@SiO 2 and its application in TNP tri-mode sensing construction for TNP visual detection. Download: Download high-res image (187KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）