ACS Sustainable Chemistry & Engineering
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2026
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IF 7.6
Huan Qiu,Shuang Shao,Yonggang Wei,Bo Li,Hua Wang
With the rapid development of the global new energy industry, the strategic importance of lithium is becoming increasingly prominent. Clay-type lithium ore has attracted growing attention as an emerging resource, and its development and utilization are vital for a sustainable supply of lithium. Herein, a combined process involving potassium sulfate (K2SO4) roasting and water leaching was proposed to extract lithium from the clay-type lithium ore. Parameter optimization experiments indicated that the optimal Li extraction reached 93% with a 50% K2SO4 dosage and was roasted at 850 °C for 1 h. Comparative analysis of the raw ore, roasted product, and leached residue confirmed that the lithium extraction mechanism primarily involves ion substitution between Li and K. Additionally, we innovatively introduced briquetting technology to enhance the K2SO4 roasting process, ultimately reducing the K2SO4 dosage from 50% to 30%. This was attributed to the fact that briquetting pretreatment increases the effective contact area between K2SO4 and lithium-bearing minerals, thereby enhancing the solid–solid reaction efficiency. This study confirms that briquetting-enhanced roasting is an effective method for reducing reagent consumption, providing valuable insight for the economic and efficient extraction of lithium from clay-type lithium ore.
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ACS Sensors
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2026
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IF 10.9
He-Jie Wang,Hao-Nan Chen,Xuan-Yu Yang,Fei-Long Gong,Ke-Feng Xie,Shi-Zhong Wei,Yong-Hui Zhang
The development of highly sensitive and reliable hydrogen detection technology is a critical prerequisite for the safe and large-scale application of green hydrogen energy. Pd-based metal oxide semiconductor sensors exhibit decent sensing performance; however, their development for hydrogen detection is hindered by competitive adsorption of hydrogen and oxygen on the surface and sluggish reaction kinetics due to limited active interfaces. Here, a series of Pd nanoparticle-decorated, K+ interstitial doping WO3 nanosheets (PdNP-K/WO3-x) were synthesized. The optimized PdNP-K/WO3-15 sample exhibited exceptional H2 sensing performance, including a high response (Ra/Rg = 1235.94 to 50 ppm H2) at a low temperature of 130 °C, with fast response/recovery. This enhancement stems from synergistic effects where K+ interstitial doping increases electron density and oxygen vacancies in WO3, improving charge transfer and strengthening the W-O-Pd interface. The resulting electron-rich environment also shifts the d-band center of Pd, enhancing hydrogen desorption and spillover, while reducing competitive oxygen adsorption to free up more Pd active sites. The material also showed promising room-temperature sensing, indicating strong application potential and providing a theoretical basis for designing high-performance alkali metal ion-doped metal oxide materials.
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Analytical Methods
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2026
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IF 3
Xingyun Zhao,Jiangyan Jin,Peng Wang,Yonghao Chai,Kairui Zhu,Liyun Zhang,Ruifang Wang,Ke Li,Rongfang Wu
Specifically, the oxidation of imine linked TAPT-TA-COF@SiO2 was prepared using 2,4,6-tris (4-aminophenyl-1,3,5-thiazine (TAPT) and 1,4-benzenedicarboxaldehyde (TA) as monomers through one pot cascade polymerization reaction on the surface of silica spheres, was carried out with high yield and specificity. Notably, its BET specific surface area and the pore size distribution of the spheres retained mesoporous similarly to the original porous silica microspheres obtained in this work. Chromatographic performance and multiple retention mechanisms were investigated, demonstrating efficient separation of neutral polar solutes and nonpolar compounds in reverse-phase chromatography mode than that achieved with the unmodified COF. Moreover, an improved separation method was established for representative saccharides and complex oligosaccharide samples confirmed that the post-modification amide TAPT-TA-COF@SiO2 based core-shell stationary phases were hydrophilic than imine-linked TAPT-TA-COF@SiO2 materials. These findings provide new opportunities for advancing the understanding of COF as HILIC stationary phases for separations, contributing to the application of COF in separation science.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Guanji Chen,Dan Qiu,Li Xu,Guangjie Liang,Peng Xie,Yuewen Huang,Shudong Lin,Bin Wang
Efficient removal and rapid in situ monitoring of Cu(II) in wastewater are of great importance for aquatic environmental remediation, yet conventional adsorbents generally fail to simultaneously achieve high adsorption capacity and quantitative detection. In this study, a N-doped carbon dot composite hydrogel strategy integrating adsorption and fluorescence sensing was proposed. A three-dimensional hydrogel network rich in N/O-containing functional groups was constructed using gelatin methacryloyl (GelMA), acrylic acid (AAc), acrylamide (AAm), and nitrogen-doped carbon dots (NCDs) were further introduced to fabricate the bifunctional fluorescent composite hydrogel NCDs-GA 1 A 2 gel. This structure not only provided abundant coordination and electrostatic adsorption sites for Cu(II), but also endowed the material with optical responsiveness for fluorescence detection. Batch adsorption experiments showed that the Cu(II) adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model, indicating monolayer chemisorption, with a maximum theoretical adsorption capacity of 203.1 mg·g −1 . After ten adsorption-desorption cycles, the hydrogel retained 86.7% of its initial adsorption capacity, demonstrating favorable regeneration stability. Meanwhile, NCDs-GA 1 A 2 gel could serve as a fluorescent probe for Cu(II), showing a good linear fluorescence response to Cu(II) concentration and a low detection limit of 0.65 μM. Coexisting ion interference experiments further confirmed its excellent selectivity and anti-interference capability. This work provides a facile strategy for developing multifunctional biomass-derived fluorescent hydrogel adsorbents and demonstrates promising application potential for Cu(II) removal and in situ detection in wastewater
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Weiwei Bao,Mameng Yang,Ziyi Jia,Taotao Ai,Jie Han,Qian Chen,Zhifeng Deng,Peng Jiang,Junjun Zhang
Oxygen anion engineering strategy effectively suppresses dissolution of CoFe-LDH anodes in AEM water electrolyzers. • In situ Raman spectroscopy and DFT calculations reveal oxyanion adsorption inhibits metal leaching and enhances OER kinetics. • Adsorbed oxyanions stabilize the electrode interface by preventing surface reconstruction, improving durability. • AEM electrolyzer based on CoFe-LDH/NF electrodes achieved 400 mA cm −2 at 1.77 V and excellent stability over 80 h. High-performance anion exchange membrane water electrolyzers (AEMWEs) are essential for sustainable hydrogen production, yet metal dissolution of non-noble CoFe layered double hydroxide (CoFe-LDH) anodes under industrial operating conditions severely limits their practical deployment. Herein, we present an oxyanion engineering strategy to restrain active site dissolution of cobalt‑iron-based anodes. Inductively coupled plasma mass spectrometry confirms that electrolyte-borne sulfate significantly suppresses cobalt and iron leaching, while in-situ electrochemical impedance spectroscopy and Raman measurements demonstrate that the improved stability arises from selective sulfate adsorption at the electrode interface during catalysis. This oxyanion regulation simultaneously preserves structural integrity and elevates intrinsic oxygen evolution reaction activity. A sulfur-containing heterostructured catalyst is further designed to release sulfate in situ via sulfur oxidation under OER conditions, which autonomously inhibits metal loss and validates the proposed interfacial protection mechanism. As a result, the AEMWE assembled with this catalyst delivers a high current density of 400 mA cm −2 at a low cell voltage, maintaining stable operation for over 80 h. The protective mechanism proves generalizable, as a series of oxyanion species-including selenite, molybdate, and tungstate-exhibit comparable stabilizing and activity-promoting functions. This study establishes a facile and versatile route to advance the long-duration durability of alkaline water electrolysis devices. CoFe-LDH anodes in AEM water electrolyzers suffer from dissolution at industrial current densities. This work introduces an oxygen anion engineering strategy. Adding oxyanions like sulfate suppresses metal leaching, enabling stable operation at 400 mA cm -2 for over 80 h with a low voltage of 1.77V, while also boosting reaction kinetics. The method proves universally effective with various oxyanions. Download: Download high-res image (127KB) Download: Download full-size image
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JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 10.6
Kun Lang,Yuanyingxue Gao,Panzhe Qiao,Xudong Xiao,Mingyang Liu,Bin Wang,Xinrui Li,Wei Wu,Jingping Ge,Huiyuan Meng,Baojiang Jiang
Air calcination stabilizes LaMnO 3 but can promote particle coarsening and oxidation-driven Mn-valence elevation, reducing Mn e g -electron availability for nitrite-to-ammonia conversion. Here, B-site Ni regulation yields a more dispersed LaMnO 3 nanoperovskite, LaMn 0.95 Ni 0.05 O 3 (LMNO), while coupling oxygen-defect formation with Mn-valence rebalancing without disrupting the LaMnO 3 -type lattice. Combined structural and spectroscopic analyses show stronger oxygen-defect signatures, enhanced lattice-oxygen reducibility, lower average Mn valence, and altered Mn-centered coordination after Ni incorporation. These changes suggest electron compensation of neighboring high-valent Mn species and a more electron-rich Mn–O environment for nitrite activation and hydrogenation. In situ infrared spectroscopy and density functional theory calculations further indicate stepwise intermediate hydrogenation, favorable H 2 O dissociation and initial NO 2 stabilization at Ni sites, Ni 3d and Mn 3d/O 2p states near the Fermi level, and more favorable overall conversion thermodynamics at Ni-regulated Mn sites. LMNO delivers an NH 3 yield rate of 8996 μg h −1 cm −2 with 97.3% Faradaic efficiency and remains stable for 400 h. Downstream acid trapping enables crystalline NH 4 Cl recovery, while tests with pretreated landfill leachate show a shift in nitrogen speciation toward NH 4 + and reduced seedling-growth inhibition.
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Nature Communications
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2026
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IF 18.1
Jin Shanyuhan,Xu Daliang,Xu Peiwen,Yin Kangwei,Du Jiaxin,Chen Han,Fan Jinling,Liang Heng,Wu Zhongbiao,Wu Xuanhao
Electrochemical nitric oxide reduction (NORR) under industrially relevant dilute feeds is fundamentally limited by insufficient interfacial NO coverage and rapid loss of reactive intermediates. Here we introduce quantifiable nanoconfinement as a coverage-regulation strategy for NORR in the ppm regime. Hollow multishelled Cu 2 O nanoreactors are constructed as a model system, in which shell number defines confinement depth and progressively strengthens confinement by narrowing inter-shell cavities. Under a 1000 ppm NO feed, the three-shell catalyst achieves a Faradaic efficiency of 97.9% and a single-pass NO conversion of 97.3%, which is competitive with systems operating under NO-rich conditions. Finite-element simulations quantitatively show that multishell confinement nonlinearly amplifies intermediate enrichment, increasing local *H and *NH concentrations by over an order of magnitude relative to the single-shell structure while also enhancing local NO coverage. Coverage-dependent density functional theory and transition-state calculations reveal that the confinement-modulated coverage environment reshapes the NORR kinetic and thermodynamic landscape by rebalancing initial *NO hydrogenation and NH 3 desorption, defining a favorable coverage window that balances intermediate activation and product release. These findings establish nanoconfinement-enabled coverage engineering for electrocatalysis under dilute feeds.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Wanxiang Yu,Ye Liu,FuBao Qiu,Yuyan Chen,Yingsi Huang,Xiaoming Luo
Dehydroacetic acid (DHA) is a commonly used preservative widely applied in food products. Currently, the quantitative analysis process for DHA remains cumbersome, involving multiple toxic organic reagents. To address these issues, this study leveraged the low-toxicity, environmentally friendly, and rapid characteristics of aqueous two-phase systems (ATPS) to develop a pretreatment method suitable for the extraction and purification of DHA. This method is compatible with both high-performance liquid chromatography (HPLC) and gas chromatography (GC) techniques. For HPLC, acidic chromatographic conditions were developed to mitigate issues such as peak tailing and retention time drift, improving peak shapes and stabilizing retention times. For GC, appropriate chromatographic conditions were established for accurate quantitative analysis of DHA. The study focused on screening appropriate ATPS types and optimizing the composition ratios of their constituent components to achieve optimal extraction and purification efficiency for DHA. Method validation and sample analysis were conducted for both ATPS-HPLC and ATPS-GC approaches. Under the ATPS conditions composed of 5.00 mL water, 2.00 mL n-propanol, and 7.00 g sodium dihydrogen phosphate, results demonstrated that the ATPS-HPLC (GC) method is accurate, reliable, rapid, and environmentally friendly, with detection limits of 2.00 × 10 −4 g/kg (6.00 × 10 −4 g/kg), average recoveries of 93.7–104 % (98.3–107 %), and relative standard deviations (RSDs) of 0.7–5.2 % (1.9–6.8 %).
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FOOD CHEMISTRY
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2025
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IF 9.8
Chencheng Wei,Jiheng Zhang,Gaozheng Li,Yi Zhong,Zhaoting Ye,Handong Wang,Kezhi Li,Yuanzi Wu,Yuezhong Wu,Heng Luo,Qi Sun,Zuquan Weng
Formaldehyde (FA), a known carcinogen, is occasionally used illegally as a preservative in seafood, while traditional detection methods for FA residues often fail to meet the practical needs for nondestructive detection. In this study, a approach was developed by combining a portable Raman spectrometer with the InceptionTime deep learning model without sample pretreatment. Model were trained by FA-negative and FA-positive Raman spectral data from the shrimp surface and achieved accuracies of 84.40 % and 85.17 % at detection thresholds of 5 mg/kg (the primary safety detection threshold) and 100 mg/kg (the abuse-level contamination threshold), respectively. Metabolomic analysis and weight visualization indicated that the model particularly focused on Raman peaks associated with specific amino acids and astaxanthin-binding proteins. Two amino acid metabolites, timonacic and spinacine, were also identified as direct indicators of FA addition. Our model offers a field-deployable and practical approach for real-time and on-site FA detection scenario.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Qiang Fang,Yunzhen Jia,Tao Zhao,Geng Li,Xuelei Lang,Ziyao Yang,Jianjun Ma,Dazhong Zhong,Jinping Li,Qiang Zhao
Acidic electrochemical CO 2 reduction (CO 2 RR) to high-value C 2+ products offers a promising route for CO 2 utilization. However, it still faces severe challenges: competitive hydrogen evolution reaction (HER) and slow C C coupling. To address these issues, we propose a defect engineering strategy by Fe-doped carbon nitride (FeCN) modification to reduce Cu defect formation energy, thereby inducing abundant and stable surface defects. We synthesized a magnetron-sputtered Cu nanoparticle (MSCu) catalyst modified with FeCN (MSCu-FeCN) and evaluated its performance in a membrane electrode assembly (MEA) under acidic conditions. At 500 mA·cm −2 , MSCu-FeCN achieves a remarkable C 2+ Faradaic efficiency (FE) of 73.07 % and a single-pass CO 2 conversion efficiency (SPCE) of 57.30 % with a full-cell voltage of 3.88 V, significantly superior to the original MSCu. Density functional theory (DFT) calculations, cyclic voltammetry curves, and in-situ attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy confirm that FeCN lowers Cu defect formation energy, increases surface defect density, enhances *CO intermediate coverage, thereby promoting C C coupling. This work presents a defect engineering approach enabling high-efficiency acidic CO 2 RR, while providing pivotal insights for industrial-grade electrocatalytic systems.
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Journal of Energy Storage
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2025
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IF 9.8
Yangkai Sun,Yan Ding,Tianchi Shen,He Gong,Shurong Wang
The precise manipulation of the pore structure of carbon electrode materials at the atomic level is crucial for achieving ultra-fast charge and discharge in high-power supercapacitors. In this study, a novel strategy based on a trace amount of potassium ion (K + ) template-mediated liquid-liquid interface activation is developed. Using light bio-oil as the precursor, this method exploits the directional aggregation effect of its oxygen-rich macromolecules on the K + activating agent surface, successfully producing carbon materials with a high specific surface area (2044.4 m 2 /g), large pore volume (1.13 cm 3 /g), and high microporosity (97 %). The optimal carbon material demonstrates excellent electrochemical performance in aqueous supercapacitors: specific capacitances of 234.4 F/g and 434.5 F/g are achieved at 0.1 A/g in 6 M KOH and 0.25 M K 2 SO 4 electrolytes, respectively. Even after a 1000-fold increase in current density, 63.2 % of the initial capacitance is retained, demonstrating exceptional rate capability. Notably, the amount of activator used in this method is reduced by 27 times compared to traditional processes (activator/precursor ratio decreased from 3:1 to 1:9). Furthermore, comprehensive characterization techniques are employed to elucidate the chemical properties of light bio-oil and the pore-forming mechanism through activation with a low ratio of K + templates. The transport properties of different electrolyte ions within the pore structure of the synthesized carbon materials are also revealed. Particularly, the carbon electrode materials demonstrate exceptional cycling stability, maintaining nearly 100 % of their initial specific capacitance after 51,000 charge-discharge cycles at 10 A/g. This innovative liquid-liquid activation strategy, which achieves both high porosity and outstanding electrochemical performance in carbon materials using minimal activating agents, holds significant implications for the valorization of bio-oils.
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ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Ze Zhang,Jiajun Lin,Mengwei Guo,Hangrui Zhang,Mingyuan Gao,Rongrong Deng,Cunying Xu,Qibo Zhang
Lead–silver (Pb–Ag) anodes in the zinc electrowinning industry face severe challenges of electrochemical corrosion and sluggish oxygen evolution reaction (OER) kinetics. Precoating a protective MnO2 layer is an effective strategy to enhance their performance. However, conventional MnO2 precoating processes require high temperatures (≥80 °C) and suffer from drawbacks such as poor coverage, loose structure, and insufficient active sites. This study proposes a novel low-temperature MnO2 coating strategy tuned by K+ intercalation, enabling the controllable fabrication of high-performance MnO2 coatings from zinc electrowinning waste electrolytes. The results reveal that introducing an appropriate amount of K+ modulates the redox behavior of Mn2+ and the electrochemical crystallization process, leading to the formation of a uniform MnO2 film on the Pb–Ag anode. The intercalation of K+ into the MnO2 lattice promotes the generation of abundant surface vacancies, which enhance the OER performance. This work presents a scalable solution for low-temperature coating of MnO2 film on Pb–Ag anodes, enabling efficient and clean zinc electrowinning, and opens a new avenue for designing energy-efficient MnO2-based anode materials through additive intercalation tuning.
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