Journal of Water Process Engineering
·
2023
·
IF 7
Fangke Yu,Xiaochun Xu,Jing Yang
In this study, precursor ultrathin molybdenum disulfide nanosheets and ZIF-67 was selected to prepare Co and N co-doped porous carbon by the support of Mo (MoS 2 /Co@NPC) to activate peroxymonosulfate (PMS) for perfluorooctanoic acid (PFOA) degradation. The morphology, crystal form and composition of MoS 2 /Co@NPC are studied by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and other methods. In MoS 2 /Co@NPC/PMS process, PFOA was completely degraded in 180 min at pH 7, 0.3 g/L catalyst, 0.1 mM PMS and reaction temperature of 25 °C. The degradation efficiency was much higher than that in other systems. The oxidative species for PFOA degradation was studied using free radical quenching experiments and electron paramagnetic resonance (ESR) tests. SO −4 plays a major role in the degradation of PFOA, OH plays an auxiliary role, and 1 O 2 contributes the least. The effect of different types and positions of cobalt‑nitrogen and molybdenum atoms on the electrocatalytic activity was investigated by density functional theory (DFT) calculations. The co-doping of Co and N into carbon-based materials can synergistically enhance by Mo for the activation of PMS. The unsaturated S atoms on the surface of metal sulfides can trap protons to form H 2 S while exposing the reducing metal active site, which also accelerates the rate-limiting step of the Co 3+ /Co 2+ conversion. The core-shell structure of Co@NPC doped with Mo has the characteristics of improving the electron transfer ability of carbon, promoting the mass transfer of reactants, and preventing cobalt metal agglomeration and metal dissolution. The degradation pathways of PFOA were investigated and three possible pathways were proposed. In addition to PFOA, MoS 2 /Co@NPC-800/PMS system can also remove contaminant in pharmaceutical wastewater, indicating that the process has potential application value in practical wastewater treatment .
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Leikai Ye,Fangyan Chen,Yubin Tang,Wenqian Sun,Yanhua Song
At present, the rapid, sensitive, and highly selective detection of trace organic contaminants is a research spot in the field of environment. Herein, a novel fluorescent nanoprobe N, S-CDs@MIP based on N/S co-doped carbon quantum dots (CDs) coupled with amoxicillin molecularly imprinted polymer was synthesized. The fluorescent property of N, S-CDs@MIP and fluorescence quenching level of amoxicillin to N, S-CDs@MIP was explored. Furthermore, the fluorescence analysis method based on N, S-CDs@MIP probe for quantitatively detecting amoxicillin was established. The synthesized N, S-CDs@MIP has a maximum fluorescence emission wavelength of 440 nm and a significantly selective fluorescence response toward amoxicillin with a large imprinting factor of 4.07. For the developed fluorescence analysis method, the detection limit, the linear range of the standard curve, and relative standard deviation (RSD) were obtained as 1.17 ng/mL, 5.8–200 ng/mL, and <3 %, respectively. The real environmental water samples were measured with a high accuracy with the recovery of 83.6 % ~ 104.7 % and RSD of 2.3 % ~ 5.1 %. Compared to the HPLC-UV, HPLC-MS, and the fluorescence detection method based on CDs or doped CDs, the established fluorescence detection method exhibits high selectivity, wide linear range, and low detection limit. It is greatly promising in the quick detection of trace amoxicillin.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wei Li,Qian Liu,Xun Zhang,Yingfeng Wang,Maoli Yin,Xuchen Tao
This study mainly aimed to reveal the superiority of the positively charged poly( N , N -dimethyl acrylamide) (PC-PDMAA)/poly(ethyl acrylate) (PEA) structure to control poly(sodium allyl sulfonate) (PSAS)/PEA structure in enhancing the sizing properties (viscosity stability, adhesion to fibers (cellulose-based cotton and hydrophobic polyester), and film properties) and desizability of starch, and avoid desizing difficulty issue of positively charged PATAC-grafted starch, due to its worse desizing efficiency. Also, it aimed to survey the influence of grafting ratio on these properties, to develop a new biobased starch adhesive, PC-PDMAA- g -starch- g -PEA (PC-PDMAA- g -S- g -PEA), for the sizing of cotton and polyester. Under a similar grafting ratio, the PC-PDMAA- g -S- g -PEA (IV) showed significantly superior bonding to both fibers, film elongation and endurance ( p < 0.05), and better paste stability and desizability compared to control PSAS- g -starch- g -PEA (PSAS- g -S- g -PEA, IV # ). This demonstrated that combining the PC-PDMAA/PEA branches could further enhance these properties of acid-thinned starch (ATS) compared to the PSAS/PEA branches. Bonding strengths, viscosity stability, desizability, film elongation, and film endurance of PC-PDMAA- g -S- g -PEA were strengthened with an increased grafting ratio from 0 % to 10.80 %. According to these findings, PC-PDMAA- g -S- g -PEA, a novel starch bio-based adhesive with a grafting ratio of 10.80 %, showed promise for use in cotton and polyester warp sizing.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yan Runhan,Cui Hongmin,Shi Jinsong,Yan Nanfu,Weng Yaqing,Cheng Ting,Wang Wei
There are still challenges in the recovery of rare earth elements (REEs) from leaching liquor of ion-adsorption type rare earth ore. In this paper, unsaponified N, N-di(2-ethylhexyl)-diglycolamic acid (HDEHDGA) was used to develop a green extraction process for efficient separation and enrichment of REEs. The cation exchange mechanism of RE(III) extraction was proposed by slope analysis and FT-IR spectra. HDEHDGA exhibited excellent extraction performances, such as short equilibrium time, high selectivity towards RE(III) and easy stripping by 0.5 mol/L HCl solution. REEs was enriched from 287.5 mg/L to 63.30 g/L by five-stage counter-current extraction and three-stage counter-current stripping using unsaponified HDEHDGA. The enrichment factor reached 220, and the proportion of REEs was increased from 80.76 wt% to 98.82 %. The loss of REEs was controlled below 2.14 wt%. This extraction strategy helps to improve the REEs recovery and avoid ammonia–nitrogen wastewater, which demonstrates its application potential in the ion-adsorption type rare earth ore.
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ENVIRONMENTAL POLLUTION
·
2026
·
IF 7.2
Jing Zhou,Bo Zhao,Jie Liu,Junhan Ruan,Li Lin,Yi Li
N -nitrosomorpholine (NMOR), as a highly carcinogenic N -nitrosamine, has been widely detected in urban sewer systems. NMOR ranged from 27.2 to 817 ng/L in winter, follow by summer (2.09–453 ng/L), in raw wastewater collected from pumping stations connected to a Wastewater Treatment Plant (WWTP). Especially in winter, NMOR was detected (200–295 ng/L) in the influent, with residue of 98.0–116 ng/L in the effluent. Therefore, it is necessary to control NMOR before the WWTP. However, the corresponding precursors and transformation mechanisms in sewer systems are not yet fully understood. This study has identified NMOR precursors in sewer systems by nontarget analysis combined with targeted analysis. NMOR formation was confirmed by nitrosation and chloramination through distinct pathways from a known (morpholine, MOR) and two unreported ( N -methylmorpholine, NMM and N -methylmorpholine- N -oxide, NMMO) precursors. In addition, NMM and MOR were detected up to 8.65 and 14.3 μg/L in raw wastewater, as well as up to 0.250 and 1.17 μg/L in the effluent. NMOR formation by chloramine could reach to 73.0 ng/L. This study demonstrated the extensive presence of NMOR precursors in raw and treated wastewater, in which new identified precursor NMM might significantly contribute formation of NMOR.
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CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Haonan Li,Wa Gao,Kangli Ma,Jian Lei,Olim Ruzimuradov,Akhtam Samiev,Ya Chen,Jingxiang Low,Yue Li
Cocatalyst loading has been extensively adopted in photocatalysis for enhancing photocatalytic performance. However, the sluggish interfacial charge dynamics between cocatalyst and photocatalyst has restricted the wide applications of such a strategy. Herein, we introduce the Ni–N interfacial bonds between lamellar nitrogen-vacancy-rich g-C 3 N 4 /CoNi 2 S 4 nanoparticles (CN-V N /CoNi 2 S 4 ) composite material to bridge the photogenerated charge carrier separation at their interface. Specifically, extended X-ray absorption fine structure analysis reveals that these Ni–N interfacial bonds are originated from the bonding of CoNi 2 S 4 with the nitrogen atoms adjacent to the nitrogen vacancies (V N ) in g-C 3 N 4 . Experimental evidence and theoretical calculations reveal that Ni–N interfacial bonds cannot only cause an intimate contact interface between CN-V N /CoNi 2 S 4 , but also modulate the charge distribution on the CN-V N and CoNi 2 S 4 , further boosting the photogenerated charge carrier separation. More interestingly, this tailored interfacial microenvironment significantly reduces the energy barrier for key intermediates formation while modulates the rate-determining step from *COOH generation to CO desorption, enabling efficient and controllable CO production. This work establishes a methodological framework for engineering advanced photocatalysts, enabling high-efficiency conversion of solar energy into clean fuels.
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Journal of Photonics for Energy
·
2026
·
IF 2.5
Pengyu Fei,Yun Li,LingLing Jiao,Fan Cao,Zhouze Chen,Hongbin He,Ruoxuan Peng,XingYu Zhan,Jiancheng Zhou,Yitao Si,Naixu Li
Photothermal-assisted photocatalysis, which couples localized thermal energy with photogenerated charge carriers to overcome thermodynamic and kinetic limitations, has emerged as an effective strategy for solar-driven CO2 reduction. Herein, nanoflower-like NiO/ZnO p–n heterojunction spheres were rationally constructed via a simple hydrothermal calcination method to achieve efficient concentrated photothermal-assisted CO2 reduction. The unique nanoflower morphology provides abundant interfacial contact between NiO and ZnO, while the formation of the p–n heterojunction establishes an internal electric field that suppresses electron-hole recombination. Under concentrated irradiation (4.31 W·cm−2), the photothermal coupling effect reduces the apparent activation energy and enables the NiO/ZnO photocatalyst to deliver CO and CH4 production rates of 51.78 and 15.96 μmol·g−1·h−1, which are 7.92 and 9.61 times higher, respectively, than those obtained under nonconcentrated illumination. Photoelectrochemical measurements and in situ DRIFTS further reveal that the built-in electric field facilitates directional charge transfer from ZnO to NiO, thereby promoting CO2 adsorption and activation. We demonstrate an efficient photothermal-coupling strategy to construct high-performance catalysts for artificial photosynthesis and solar-to-fuel conversion.
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ACS Catalysis
·
2026
·
IF 13.6
Guilan Xu,Huan Liu,Yunlong Zhang,Wangwang Zhang,Pan Gao,Guangjin Hou,Liang Yu,Xiaoju Cui,Dehui Deng
The photocatalytic conversion of CH4 and O2 to C1 oxygenates represents a promising route for chemical synthesis, yet current systems predominantly depend on metal-based catalysts to achieve efficient light harvesting and charge separation. Herein, we report a metal-free alternative using boron confined within g-C3N4 (B/C3N4), which achieves a C1 oxygenates production rate of 28.1 μmol gcat.–1 h–1 with a 60% improvement in activity compared with pristine g-C3N4. Combined experimental and theoretical investigations reveal that boron confinement in g-C3N4 induces orbital delocalization, which enhances charge carrier separation and creates dual-functional nitrogen sites that facilitate CH4 oxidation and O2 reduction reactions. Delocalized nitrogen sites with the lowest unoccupied molecular orbital are responsible for reducing O2 to •OH radicals, whereas counterparts with the highest occupied molecular orbital facilitate the oxidation of CH4 to •CH3 radicals. The resulting •OH radicals can either oxidize CH4 to generate •CH3 or directly combine with transient •CH3 radicals, initiating a cascade reaction that sequentially yields CH3OH, HOCH2OH, and HCOOH.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Meng Qingling,Hu Xianwei,Wang Qiheng,Li Jiahao,Liu Aimin,Yu Jiangyu,Shi Zhongning,Wang Zhaowen
The electrochemical Al metal extraction in the room-temperature electrolyte is considered a green and sustainable approach, where temperature serves as a critical parameter that significantly influences the process. This study systematically investigates effects of the temperature on the thermal behavior of AlCl 3 - N -methylformamide (NMF) system and corresponding electrochemical process. Firstly, the thermogravimetric analysis and the in-situ temperature-rising Raman spectroscopy are combined to reveal the thermal behavior of AlCl 3 -NMF system. The results show that AlCl 2 NMF 2 + fractures to produce NMF and AlCl 3 at 360 K, while NMF decomposes at 360 K and AlCl 3 volatilizes at 440 K. Secondly, cyclic voltammetry and chronoamperometry illustrate that increasing temperature enhances the limiting diffusion current density of Al(III) and reduces the electro-crystallization nucleation induction time. Thirdly, XRD, SEM and non-contact optical microscope analyses indicate that the crystal orientation, the grain size, the micro-morphology, the surface roughness and the thickness of Al coatings electrodeposited in AlCl 3 -NMF system change with the rising temperature. The changes are related to the competition for the nucleation-growth of Al grains and the thermal stability of AlCl 3 -NMF system. Al coatings electrodeposited at 333 K possess the grain size of 24.8 nm, the thickness of 12.6 ± 0.5 μm and the absolute value of average roughness of 6.1 μm.
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CELLULOSE
·
2026
·
IF 4.6
Shi Qiu,Li Gang,Qin Hongmei,Shi Zhuqun,Xiong Chuanxi,Yang Quanling
Traditional cellulose films lack both effective UV-shielding and durable flame-retardant properties, limiting their use in transparent packaging and protective. In this study, a highly transparent, UV-shielding, and flame-retardant cellulose composite film was fabricated via a solvent-exchange route. Water-insoluble triphenyl phosphate (TPP) flame retardant was diffused through ethanol into regenerated cellulose (RC) gel prepared by NaOH/urea/H 2 O low temperature dissolving system, followed by post-treatment with 3-aminopropyltriethoxysilane (KH550) ethanol solution to improve the compatibility between TPP and RC and drying. The obtained PNSi-RC films exhibit visible-light transmittance exceeding 85% and demonstrate improvement in UV shielding capability. Moreover, the PNSi 7 -RC film achieved a limiting oxygen index (LOI) of 29 and a UL-94 V-0 rating, exhibiting good flame-retardant property. The films remained largely consistent flame-retardant performance after water exposure for 24 h, and the LOI values were almost no changes. This simple strategy can be scalable to the preparation process of other films for green flame-retardant packaging and protective.
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CHEMISTRY & BIODIVERSITY
·
2026
·Vol. 23
·期 3
·e03222
·
IF 2.9
Yuhao Zhang,Qi Zhang,Shanshan Yang,Ruofei Bai,Congwei Zhou,Yiqun Wu
Discovery and development of novel antifungal agents featuring distinctive chemical scaffolds are of paramount importance for sustainable plant protection. In this study, a series of twenty-one N '-phenylpicolinohydrazide derivatives was designed and synthesized based on our previous work, characterized by spectroscopic analysis. Their antifungal activity was evaluated against nine plant pathogenic fungi, structure-activity relationships (SARs) were elucidated, and the action mechanism was investigated. The results showed that most of the compounds exhibited excellent antifungal activity, especially compounds B2-1 and B5-5 , among which the EC 50 values for Fusarium graminearum were 1.107 and 0.974 µg/mL, respectively. SAR studies indicated that the carbohydrazide or ─C(Cl) ═ NNH─ fragment in this class of derivatives is the key pharmacophore for antifungal activity. SEM analyses revealed that compound B5-5 can significantly destroy mycelial morphology. Furthermore, molecular docking indicated that B5-5 can bind well with the ubiquinone-binding region of SDH. Thus, N '-Phenylpicolinohydrazide derivatives, especially B2-1 and B5-5, can be considered promising fungicide alternatives for plant protection. Summary A series of twenty-one N '-phenylpicolinohydrazide derivatives were synthesized. Compounds exhibiting potent and broad-spectrum antifungal activity were discovered. The antifungal mechanism of the compound B5-5 was elucidated. Some compounds, especially B2-1 and B5-5 , as promising fungicide alternatives were found. Graphical
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FOOD MICROBIOLOGY
·
2026
·
IF 5.4
Liangliang Gao,Tengjie Li,Zengrong Xiong,Mingnan You,Jun Zhang,Nengguo Tao
In this study, N'-(4-fluorophenyl)-2-pyridinecarbohydrazide (2-FPH), N'-(4-fluorophenyl)-3-pyridinecarbohydrazide (3-FPH), and N'-(4-fluorophenyl)-4-pyridinecarbohydrazide (4-FPH), which showed considerable antifungal activities against the prochloraz-resistant Penicillium italicum strain (PiR2), were designed and synthesized. Among these, 2-FPH displayed the strongest antifungal activity against PiR2 growth, with minimum inhibitory concentrations (MIC) of 12.5 μg/mL and minimum fungicidal concentrations (MFC) of 25 μg/mL. In vivo antifungal and hemolytic toxicity tests showed that 2-FPH effectively prevented PiR2 infection of citrus fruits, but exhibited exceptionally low hemolytic toxicity. At equivalent concentrations, its biological safety and control efficacy were far superior to those of prochloraz. According to morphological findings, 2-FPH increased cell membrane permeability, caused cell swelling and morphological abnormalities, disrupted structural integrity, and decreased chitin content in cell walls. Physiological, biochemical, and molecular biology investigations indicated that 2-FPH binds to succinate dehydrogenase (SDH), inhibits its enzymatic activity, and suppresses associated gene expression. This decreases intracellular ATP levels, disrupts normal mitochondrial function, and triggers a substantial increase in reactive oxygen species (ROS). In summary, 2-FPH shows promising potential as a possible fungicide and succinate dehydrogenase inhibitor for managing citrus blue mold.
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