FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Hai-Wen Tang,Jin-Jin Jiang,Liu-Si Yu,Hong-Lin Yu,Yun-Qian Zhong,Li-Mei Yu,Su-Jun Wang,Huan Zhang
This study presents a dual-carbon modified LiMn0.6Fe0.4PO4 cathode (LMFP/SWNT/C) through the combined integration of amorphous carbon and single-walled carbon nanotubes (SWNTs). The composite was synthesized via a solvothermal approach followed by carbonization, forming a homogeneous conductive network with enhanced graphitization (IG/ID ratio = 3.24–4.24 versus 0.98–0.99 for LMFP/C). Electrochemical characterization revealed superior performance, including a high discharge capacity of 160.8 mAh g−1 at 0.1C and excellent cycling stability (124.9 mAh g−1 with 92.6% capacity retention after 280 cycles at 1C). In-situ electrochemical impedance spectroscopy (EIS) coupled with distribution of relaxation times (DRT) analysis indicated that the addition of SWNTs could improve the electronic conductivity. These results demonstrate the effectiveness of hybrid carbon architectures for optimizing LMFP cathode materials.
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MINERALS ENGINEERING
·
2025
·
IF 5
Kunzhong He,Dongming Zhang,Menglai Wang,Runzhe Liu
A self–made cyclic modified fatty acid soaps (CMFAS) was used as a collector for the reverse flotation of phosphate rock for the first time. Pure mineral tests indicate that at a CMFAS dosage of 800 g/t, the phosphorus concentrate achieved a P 2 O 5 grade of 25.43 %, a recovery of 90.83 %, an MgO grade of 0.42 %, and a recovery of 13.52 %, demonstrating relatively good performance. When 1200 g/t NaOL was used, the phosphorus concentrate had a P 2 O 5 grade of 25.18 %, a recovery of 52.07 %, an MgO grade of 1.68 %, and a recovery of 30.56 %. Fourier transform infrared spectroscopy (FT–IR) analysis revealed the formation of a new complex when dolomite reacted with CMFAS, accompanied by a new absorption peak in the infrared spectrum. Conversely, no new absorption peaks were observed for CMFAS and apatite. Zeta potential test results showed that the collector addition shifted the isoelectric points of both dolomite and apatite in a negative direction, with the most pronounced shift observed in the dolomite–CMFAS system at 53.88 mV. Density functional theory (DFT) calculations showed that the sulfonic acid group of CMFAS preferentially adsorbs onto dolomite, with an adsorption energy of 85.37 kJ·mol −1 , significantly higher than the 31.32 kJ·mol −1 observed for apatite. Although NaOL also reacts with dolomite, its interaction with apatite is more pronounced. The adsorption energy between NaOL and dolomite (73.91 kJ·mol −1 ) exceeds that of apatite (35.67 kJ·mol −1 ). Therefore, CMFAS is a promising reverse flotation collector for apatite, ensuring phosphate recovery while effectively removing magnesium minerals.
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WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 237
·期 1
·8
·
IF 3
Li Xiaoya,Zheng Ru,Duan Guangyu,Cao Zhanfang,Han Kai,Zhong Hong,Ma Xin,Wang Shuai
A poly( N -vinylpyrrolidone)-graphene oxide (NVP-GO) composite with high adsorption capacity for methylene blue (MB) was synthesized and comprehensively characterized using SEM, XRD, FT-IR, TG, elemental analysis, nitrogen physical adsorption, and XPS. The adsorption of MB onto NVP-GO was examined in relation to several variables, including contact time, adsorption temperature, initial concentration of MB, and pH. Adsorption kinetics, isotherms, and thermodynamics were thoroughly investigated. The adsorption kinetics followed the pseudo-second-order model, and the Langmuir isotherm model indicated a monolayer adsorption pattern of MB onto NVP-GO, with the maximum adsorption capacities ranging from 116.6 to 161.3 mg·g −1 at temperatures between 25 and 45 °C. Thermodynamic assessments and activation energy calculations demonstrated that the adsorption process was spontaneous, endothermic, and controlled by chemical activation. XPS analysis highlighted the significance of electrostatic interactions, n–π interactions, π–π stacking, and hydrogen bonding in mediating the adsorption mechanisms between NVP-GO and MB. Notably, NVP-GO maintained stable adsorption efficiency over three consecutive adsorption–desorption cycles, highlighting its potential as a promising adsorbent for wastewater treatment. Graphical
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Particuology
·
2025
·
IF 4.3
Jing Lao,Zihan Mu,Yangcheng Lu
A novel high temperature oxidation precipitation method for synthesizing high-purity nano-sized ferric phosphate was proposed. We systematically investigated the impact of reaction temperature on the properties of the ferric phosphate product and its slurry. The study found that the FePO 4 obtained by the high-temperature precipitation method consisted of amorphous nanoparticles with a narrow size distribution around 30 nm. Increasing the reaction temperature did not affect the purity or crystal structure of the particles, but it reduced the viscosity and solid content of the slurry, beneficial for improving the solid-liquid separation efficiency in subsequent production processes. Characterization of products obtained at different reaction temperatures using FTIR, XPS, and ICP-OES revealed that elevated temperatures decreased the content of hydroxyl groups on the surface of the ferric phosphate particles, weakening the adsorption of metal ion impurities on the particle surface and the interaction between particles. The LiFePO 4 @C material synthesized using the nano FePO 4 product obtained by the high-temperature oxidative precipitation method as a precursor exhibited good rate performance (137.1 mAh g −1 at 5 C). This high-temperature oxidative precipitation method might enable controllable, continuous, and easily scalable production of nano-sized FePO 4 production.
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Journal of Energy Storage
·
2025
·
IF 9.8
Lintao Dong,Shengrui Cui,Youjun Xing,Furui Ma,Yanqing Wang,Deye Sun,Yongcheng Jin
The increasing demand for lithium-ion batteries with high energy density has driven research into olivine-type high-voltage cathode materials . However, the development of these materials is hindered by two significant challenges: poor electronic conductivity and a low lithium-ion diffusion coefficient . Herein, carbon-coated LiCoPO 4 materials were synthesized using precursors with different space groups via a solvothermal method, employing a binary mixture of diethylene glycol (DEG) and water as solvents. The influence of the solvent ratio on space group regulation, structural characteristics, and electrochemical performance was systematically investigated. When the solvent ratio (V DEG : V H2O ) is <2.3, the resulting cathode material exhibits a pure phase belonging to the Pnma space group. Conversely, when the solvent ratio exceeds this threshold, a metastable phase corresponding to the Pn 21 a space group is formed. Electrochemical testing revealed that the performance of LiCoPO 4 materials in the Pnma space group significantly surpasses that of materials in the Pn 21 a space group. Notably, the LiCoPO 4 /C material synthesized with a V DEG : V H2O ratio of 2.3, which crystallizes in the Pnma space group, demonstrates the most outstanding performance among the samples studied. This material achieves a specific discharge capacity of 157.1 mAh g −1 at 0.1C and 91.9 mAh g −1 at 2C. Additionally, the lithium-ion diffusion coefficient of this material reaches 1.01 × 10 −14 cm 2 s −1 . In summary, the electronic conductivity and lithium-ion diffusion coefficient of LiCoPO 4 were effectively enhanced through carbon coating and precise control of the crystal phase of the primary grains. This study provides valuable insights into strategies for further improving the performance of polyanionic-based cathode materials, offering a foundation for future advancements in high-energy-density lithium-ion batteries.
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Journal of Energy Storage
·
2026
·
IF 10.7
Xinyu He,Min Du,Wanqing Wu,Dedi Zhou,Yihang Zhao,Haokun Shi,Qinggong Zheng
In recent years, with the development of electric vehicles and electric vessels, the issues of battery thermal safety have garnered significant attention. Composite phase-change materials (CPCMs) hold great potential as passive cooling systems in battery thermal management systems (BTMS), but their high flammability remains an unresolved challenge. This study successfully developed a flexible composite phase-change material, CPCM/P-CSF@rGO, by encapsulating a eutectic phase-change material composed of mannitol and galactitol in a three-dimensional hydrogen-bonded network, self-polymerised by phosphated corn straw cellulose (P-CSF) and reduced graphene oxide (rGO). The study demonstrates that the strong hydrogen bonding network formed between the phosphate groups introduced by phosphoric acid modification and rGO constructs highly efficient thermal conduction pathways, achieving a thermal conductivity of 1.039 W/(m•K) and significantly accelerating thermal response rates. Simultaneously, the incorporation of the P-CSF@rGO framework endows the material with excellent flexibility and shape stability. Due to the in-situ flame-retardant modification of the framework, the phase-change material maintains a high latent heat of phase-change (194.7 J/g) and achieves superior flame retardancy through gas-phase and condensation-phase mechanisms. It exhibits a limiting oxygen index of up to 30.64% and rapidly extinguishes itself when exposed to open flame in atmospheric conditions. Thus, the flexible composite phase-change material (CPCM/P-CSF@rGO) supported by a phosphorylated cellulose framework emerges as a promising candidate for ensuring safety and high performance in thermal management applications.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chengdong Ma,Zhengqiang Guo,Hongrui Zhang,Weigui Xie,Wangyu Liu
Surfactant-free phosphoric acid dissolution of TPO for vat photopolymerization • Rapid gelation (3.3 s) and high fracture strength (430 kPa) achieved • Stable ionic conductivity retained over 30 days • The improved BCC lattice sensor eliminates the pressure-insensitive plateau region. • Wearable and soft robotic lattice manipulator applications demonstrated The vat photopolymerization (VPP) of high-performance hydrogels is constrained by the limited aqueous solubility of the highly efficient photoinitiator diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO). Here, we report a surfactant-free strategy to directly dissolve TPO using phosphoric acid (PA), enabling a rapidly photocurable and high-strength PT-AP (PA/TPO-Acrylamide/PEGDA) ionic hydrogel. The PT-AP precursor exhibits rapid liquid-to-solid gelation (3.3 s) at a low energy dosage of 13.16 mJ cm −2 , while retaining considerable mechanical properties after curing. The cured PT-AP ionic hydrogel achieves a strength of 430 kPa, a Young's modulus of 137.5 kPa and a toughness of 1530.71 kJ m −3 . It also demonstrates high ionic conductivity (25.11 mS cm −1 ) with stable retention within 30 days. Comprehensive printability assessments using test geometries and classic strut-based lattices confirm the high VPP manufacturing capacity of PT-AP ionic hydrogel. Furthermore, a continuously graded beam-diameter BCC lattice capacitive sensor is developed, which suppresses the pressure-insensitive plateau and yields high sensitivity over the full dynamic range. Finally, applications in wearable devices and flexible lattice manipulators displayed the potential of this platform for soft sensing and human-machine interaction. This work establishes a surfactant-free TPO dissolution method as a high-efficiency VPP material foundation for developing strong, conductive, and long-term stable ionic hydrogel.
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Polymers
·
2026
·Vol. 18
·期 15
·1806
·
IF 5.8
Juan Wang,Ziyu Duan,Zhenzhen Zhang,Jungang Jiang,Ying Chang,Zhishun Wei,Jan-Michael Albina
The development of sustainable and efficient adsorbent materials for tetracycline hydrochloride (TCH) removal is of great importance for wastewater treatment. Structural characterizations (XRD and FTIR) confirmed successful lignin carbonization and the abundance of oxygen-containing functional groups, while N2physisorption revealed a phosphoric acid-induced hierarchical porous structure rich in mesopores to facilitate mass transfer. CL exhibited excellent tetracycline hydrochloride (TCH) adsorption, achieving a maximum capacity of 21.06 mg g−1within 2 h. The adsorption data closely followed the pseudo-second-order kinetic model, indicating a predominantly chemisorption process. While nanocellulose enabled the fabrication of flexible, self-supporting films with well-dispersed CL, excessive loading deteriorated film integrity. An optimized 30 wt% CL content achieved the ideal balance between structural stability and adsorption performance, demonstrating that these sustainable films hold great potential for aquatic antibiotic remediation.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·Vol. 74
·期 28
·22149-22158
·
IF 6.7
Sun Ze-Rui,Xia Yu-Xin,Li Yi-Ran,Liu Li,Voglmeir Josef
The deacetylation of N -acetylglucosamine
(GlcNAc)
to glucosamine (GlcN) is a key step in enzymatic chitin valorization.
We identified a novel GlcNAc deacetylase (AbNGD) from Acinetobacter baumannii with high substrate specificity
and catalytic activity but poor thermal stability (half-life of 5.5
h at 37 ° C). Using the FireProt platform, we generated a combinatorial
mutant, AbNGD-M3 (T93P–C153T-A244M). Its optimal temperature
increased to 37 ° C, and its half-life reached 28.1 h (5.1-fold
improvement), while retaining 97% of wild-type catalytic efficiency
( k cat / K m =
3.4 mM –1 ·s –1 ). Site-directed
mutagenesis confirmed Asp54 and His160 as key catalytic residues.
Molecular dynamics simulations revealed that T93P reduces backbone
flexibility, C153T enhances β-sheet rigidity via hydrogen bonding,
and A244M improves hydrophobic packing by filling a core cavity. These
distal mutations collectively balance stability and activity. Substrate
channel analysis identified a likely transport pathway centered on
T1. This study expands the deacetylase repertoire and provides a framework
for engineering stable industrial enzymes.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Jinlan Yang,Habib Khan,Chushi Chen,Meng Wang,Lina Xiu,Li Yang
Paper-based analytical devices (PADs) have revolutionized environmental monitoring, food safety and disease diagnosis due to their inherent portability, simplicity, and cost-efficiency. Among these, distance-based PADs enable instrument-free quantitative detection by translating target concentration into measurable flow distance. Stimuli-responsive hydrogels, whose viscosity can be altered by target-triggered sol-gel transitions, are widely used in distance-based PADs, among which click-chemistry hydrogels stand out by virtue of their efficient and stable covalent bonding. Such stable covalent networks provide click hydrogels with strong anti-swelling and anti-degradation properties, crucial for reliable performance in on-site environments. In this study, we present a novel distance-based PAD approach that integrates target-induced click hydrogels, establishing a highly stable, versatile, and sensitive platform for multi-analyte detection. This innovative PAD makes use of copper-catalyzed azide-alkyne cycloaddition click chemistry to craft hydrogels from polyethylene glycol derivatives. Notably, specific target analytes like Cu²⁺, ascorbic acid, alkaline phosphatase, and pyrophosphate finely modulate the hydrogel crosslinking degree, causing noticeable changes in its viscosity. These viscosity variations are then translated into measurable flow distances on pH test papers, providing a direct and quantitative visual readout without the need for complex instrumentation or extensive operation. The entire detection process, from sample loading to result readout, can be accomplished within approximately 5 min, demonstrating the rapid analysis capability of this approach. This work offers stable, rapid, sensitive, and cost-effective multi-target detection, significantly advancing instrument-free PAD technology and expanding the scope of versatile analyte detection.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Guoyong Liu,Yanrui Xie,Yanzhen Cao,Yingying Jing
Under the catalysis of MnO 2 , TBHQ can react with Cys to generate fluorescent CDs. • A fluorescence turn-on sensor for detection of TBHQ is proposed based on in-situ formation of fluorescent CDs. • This sensor is capable of quantitatively measuring the concentration of TBHQ in edible oils. Excessive intake of the food additive tert -butylhydroquinone (TBHQ) causes potential hazards to the human body. Designing an easy-to-fabricate and efficient TBHQ sensor is of great research significance. We found that in the presence of MnO 2 , TBHQ can react with cysteine (Cys) to generate fluorescent carbon dots (CDs). Inspired by this simple fluorogenic reaction, a turn-on sensor for TBHQ detection is proposed based on in-situ formation of fluorescent CDs. The sensor offers a linear range of 1–200 μM and a detection limit as low as 0.06 μM. Due to its simple reaction precursors and unambiguous reaction mechanism, this sensor demonstrates good practicability for TBHQ measurement in edible oils. This fluorescence turn-on in-situ sensor, which does not require pre-synthesized materials, offers considerable potential for on-site detection of TBHQ. Download: Download high-res image (122KB) Download: Download full-size image
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DENTAL MATERIALS
·
2026
·
IF 6.3
Zhenzhen Zhang,Chang Shu,Shengli Hu,Jingheng Wu,Yadong Chen,Yanji Lu,Qi Zhong,Mengqi Pan,Jiajia Xu,Zhuo Chen,Xiaodong Li,Qiaojie Luo
CaCl₂/AgF treatment achieves rapid ex vivo dentinal tubule occlusion within 40 s. • Co-precipitation generates deep intratubular deposits (∼96 μm). • Occlusion remains stable after brushing, ultrasonication, and acidic challenges. • CaCl₂/AgF treatment reduces fluid transport under simulated pulpal pressure. • The Ca–Ag strategy shows promise for durable dentinal tubule occlusion. Objectives Dentin hypersensitivity arises from fluid movement within patent dentinal tubules. Existing chemically mediated occlusion strategies require days to weeks, limiting clinical applicability. This study developed a rapid CaCl₂/AgF regimen for durable dentinal tubule occlusion. Methods Human third molars were acid-etched with 37% phosphoric acid for 15 s to establish an exposed dentin model. Specimens were sequentially treated with 0.05 M CaCl₂ and 0.1 M AgF for 20 s each (Ca–Ag group). Gluma, Duraphat, and Actimins served as comparators. Tubule occlusion, surface hardness, resistance to abrasive, ultrasonic, and acidic challenges, and fluid transport through pulp were evaluated. Results The Ca–Ag regimen achieved near-complete tubule occlusion (97.5 ± 1.4%) with deep intratubular deposits (96.0 ± 10.5 μm), significantly outperforming commercial desensitizers ( p < 0.001). Tubule sealing remained stable after abrasive (92.2 ± 4.3%), ultrasonic (93.8 ± 2.8%), and acidic (95.2 ± 1.9%) challenges. Surface hardness increased from 34.5 ± 2.8 HV to 46.3 ± 3.7 HV. Under 15 cm H 2 O pulp pressure, Ca–Ag markedly reduced fluid penetration, decreasing the mean fluorescence intensity from 173.9 ± 14.8–37.4 ± 6.5 AU ( p < 0.001), whereas minimal reductions were observed in the other groups. Conclusions CaCl₂/AgF treatment enables rapid, deep, and durable dentinal tubule occlusion with strong resistance to mechanical and chemical challenges. Significance The Ca–Ag regimen provides a rapid and durable ex vivo dentinal tubule occluding strategy. The clinical desensitizing efficacy and long-term performance require validation through well-controlled in situ and clinical trials.
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