FOOD CHEMISTRY
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2026
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IF 10.4
Wu Wang,Ye He,Wenjie Zhou,Yangao Zhu,Xiao-Zhi Wang,Yao Chen,Tong Wang
Aging significantly influences Anhua dark tea's quality and value, but rapid year identification remains challenging. This study developed a colorimetric sensor array (CSA) combined with deep learning for the rapid identification of storage years of Anhua dark tea. The CSA uses five carbon quantum dots (CQDs) that interact specifically with tea components (e.g., amino acids, polyphenols), producing color changes with storage time; these changes can be captured by smartphones under UV illumination. The resulting images were directly analyzed using deep learning models (ResNet18, VGG16, DenseNet121, MobileNetV3-Small, and EfficientNet B0). Among them, ResNet18 achieved the highest accuracy (92.4%), outperforming traditional RGB-based models such as PLS-DA (57.6%) and PCA-LDA (63.6%). In addition, a user-friendly graphical user interface was created for easy, non-expert operation. This work presents a novel, cost-effective, and highly accessible detection platform for Anhua dark tea authentication, offering broad potential for real-world applications in food quality control and authenticity assessment.
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高影响因子
MACROMOLECULES
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2026
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IF 5.7
Shijing Yan,Yingying Han,Meng Wu,Zhiwei Yang,Hui You,Weihua Xu,Jun Du,Cailiu Yin
The development of sustainable electronics demands materials that combine high performance with designed degradability, yet achieving this balance remains a challenge. Here, we demonstrate that systematically engineering the soft-segment molecular weight in fully degradable, biobased polyurethanes (PUs) unlocks a suite of tunable properties for high-performance pressure sensing. By varying poly(butylene adipate) (PBA) diol molecular weight in networks containing isosorbide and acid-cleavable hexahydrotriazine, we establish that longer PBA chains enhance soft-segment crystallinity and elongation (up to 978%), while an optimal intermediate molecular weight (2000 g/mol) yields the highest tensile strength (25.7 MPa) and excellent biocompatibility. This optimized PU exhibits robust shape-memory behavior (Rf > 98%) and undergoes controlled dual degradation: enzymatic (up to 50% mass loss in 6 weeks) and complete acid-triggered dissolution, enabling quantitative recovery of conductive carbon black filler. A microstructured composite sensor fabricated from this material achieves high sensitivity (15.32 kPa–1) with fast response/recovery and successfully monitors human motion. This work establishes molecular design rules for degradable PUs and provides a viable pathway toward sustainable, high-performance flexible electronics.
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LANGMUIR
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2026
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IF 4.4
Fuxiao Li,Li Zhang,Siheng Han,Lei Wang
Foam stability is significantly important for enhancing oil recovery. SiO2 nanoparticles have been widely used to improve foam stability, but hydrophilic SiO2 nanoparticles are limited in improving the stability of foam because they cannot stably adhere to the gas–liquid interface; therefore, surface modification is needed to improve their hydrophobicity. In this study, silane coupling agent (KH570) was used to modify the surface of SiO2 nanoparticles, and the effects of concentration and wettability of SiO2 nanoparticles on the property of SDS foam were explored. The results show that the concentration and wettability of SiO2 nanoparticles have little effect on the foam ability but have a great impact on the foam stability. The stability of the foam increases as the concentration of the SiO2 nanoparticles increases. As the contact angle increases, the stability of the foam first increases and then decreases. The optimal contact angle for stable foam is 70.4°, at which point the foam’s half-life time with 2 wt % SiO2 nanoparticles is 1450 s longer than that of unmodified SiO2 nanoparticles (950 s); the salt and oil resistance are also the best at this contact angle. A two-phase molecular dynamics model at the foam interface was constructed to study the effects of different SiO2 nanoparticle methylations on the stability of the SDS foam. The results indicate that as the degree of methylation of SiO2 nanoparticles increases, foam stability first rises and then decreases, reaching an optimum at 40% methylation. When the methylation degree is 40%, SiO2 nanoparticles not only adsorb near the gas–liquid interface but also jam in the plateau borders, resulting in the minimum water diffusion coefficient, and weaken the repulsive forces between DS– groups and Si–OH groups, thus slowing down the liquid drainage and coarsening process, thereby enhancing foam stability.
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Jiaqi Li,Xinjian He,Yang Wu,Ming-Peng Zhuo,Xinyu Li,Cunmin Wang,Kunkun Tu,Jiefeng Gao,Huan Xu
The development of biodegradable radiative cooling textiles that simultaneously deliver high solar reflectance, efficient sweat management, and long-term durability remains challenging. Here, we report a hierarchical Janus poly(lactic acid) (PLA) metafabric (J-PLA) enabled by molecular stereocomplexation and a plant-transpiration-inspired dual-gradient architecture. Stereocomplexation between poly(l-lactic acid) and poly(d-lactic acid) chains fundamentally enhanced the mechanical robustness and infrared vibrational intensity of the PLA matrix. Concurrently, a biomimetic dual-gradient structure, replicating the transpiration network of vascular plants, was constructed by electrospinning a hydrophilic stereocomplexed PLA/SiO2 nanofiber layer onto a hydrophobic PLA microfiber substrate. This unique architecture enabled ultrafast directional water transport (<21 s) and superior spectral selectivity, achieving a solar reflectance of 94.2% and a mid-infrared emittance of 93.3%. Under outdoor direct sunlight (dry condition), J-PLA achieved a maximum temperature reduction of 12.1 °C relative to bare skin and 7.2 °C relative to cotton. Under simulated sweating, directional transport and evaporation further enhance cooling, providing an additional 7.6 °C reduction at a sweat rate of 0.5 mL h–1. This work provides a novel and sustainable design paradigm for next-generation, high-performance personal thermal management textiles.
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CRYSTAL GROWTH & DESIGN
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2026
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IF 3.6
Zheng-Hao Li,Zheng Cheng,Xue-Yuan Guo,Guangdong Chen,Ning-Ning Zhang,Chuipeng Kong,Irshad Hussain,Kun Liu,Yang Yang
Control over crystal polymorphism remains a critical challenge in materials design, with broad implications for pharmaceutical efficacy, device performance, and materials stability. Here, we present a facet-directed strategy for polymorph control of organic molecular crystals using morphology-defined CeO2 nanoparticles as heterogeneous nucleating agents. Cubic and octahedral CeO2, predominantly exposing the (100) and (111) facets, respectively, were employed to regulate the crystallization of three model polymorphic compounds: 5-methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarbonitrile (ROY), tolfenamic acid (TFA), and carbamazepine (CBZ). Under identical conditions, CeO2(100) consistently induced the formation of thermodynamically stable polymorphs─ON for ROY, Form I for TFA, and Form III for CBZ─whereas CeO2(111) preferentially promoted metastable forms─YN, Form II, and Form II, respectively. In situ optical microscopy revealed distinct nucleation kinetics and growth morphologies between the two facets. Density functional theory (DFT) calculations of ROY adsorption further revealed stronger binding on the (100) surface, rationalizing the observed polymorph selectivity. These findings establish a generalizable framework for facet-directed heterogeneous nucleation, offering a mechanistic basis for polymorph control via surface atomic structure and enabling rational design of nucleating agents in crystal engineering.
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LANGMUIR
·
2026
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IF 4.4
Zhihao Zhang,Jiao Wang,Yang Liu
Droplet triboelectric nanogenerators (D-TENGs) hold significant promise for ambient energy harvesting, yet their insufficient output limits practical application. This study proposes an interfacial engineering strategy employing fluorosilane-modified SiO2 (F-SiO2) to enhance the performance of conventional D-TENG based on polytetrafluoroethylene. The constructed F-SiO2-coated droplet TENG (FSD-TENG) exhibits superior hydrophobicity compared to conventional D-TENG, achieving a contact angle of 152.3°. The FSD-TENG achieves an open-circuit voltage of 201.7 V, which is 5.8 times higher than that of untreated devices, and delivers an output power of 2.1 mW, representing a 7-fold improvement over conventional D-TENG. Its practical potential is demonstrated by illuminating 300 LEDs upon a single droplet impact. Furthermore, the FSD-TENG’s output characteristics exhibit a strong correlation with droplet pH. Leveraging multi-feature fusion of voltage and current signals, we developed a raindrop pH monitoring system. This system accurately identifies raindrop pH via FSD-TENG’s output, with a neural network achieving 95% identification accuracy within pH 3–7 after 20 training epochs. Consequently, the FSD-TENG-based monitoring system not only provides novel data support for digital twin technology but also pioneers innovative pathways for environmental monitoring, showcasing a complete technological chain from fundamental research to practical implementation.
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ACS ES&T Engineering
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2026
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IF 6.3
Linghui Peng,Weina Zhao,Fukai Xu,Manlin Dong,Guiying Li,Weiping Zhang,Zhishu Liang,Taicheng An,Huijun Zhao
The demand for self-cleaning air purification is urgently increasing due to concerns for human health and long-term use. Herein, this study investigated the enhanced mechanism of a self-cleaning artificial spider silk (PMAS) photocatalyst, which was modified by bioaffinity polydopamine (PDA) for highly efficient bioaerosol adhesive capture and photocatalytic inactivation. By increasing the bioaffinity of the PMAS photocatalyst, bioaerosols can adhere to the surface, increasing capture efficiency by 50–700%. The captured bioaerosols were concentrated on the spindle knots of the PMAS photocatalyst, forming droplet reactors for subsequent photocatalytic inactivation. Through a combination of experiments and calculations, the mechanism of enhanced capture efficiency by the PMAS photocatalyst was revealed: PDA endows doubled adsorption energy and tripled adhesion forces between the interfaces of bioaerosols and the photocatalyst due to the abundant indole and amino groups. PDA also provides hydrophilic properties to the PMAS photocatalyst, leading to a sevenfold increase in captured bacterial droplet volumes. Due to its bioaffinity, hydrophilic, and photocatalytic properties, the PMAS photocatalyst possesses self-cleaning capability by in situ inactivation of microorganisms and purification of self-washed debris, facilitating repeated use for long-term capture and regeneration of occupied active sites. This work may offer rational designs for a new generation of self-cleaning photocatalysts for air purification.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Xinyu Lv,Peng Wei,Xueying Wang,Hui Sun
In situ emulsification is a promising enhanced oil recovery technique but faces challenges including environmental concerns and high operational costs. To address this, we developed amphiphilic nitrogen-doped carbon dots (NCDs) via a facile one-pot synthesis. The NCDs exhibit high interfacial activity and undergo a three-step self-assembly with endogenous naphthenic acids in crude oil─via hydrophobicity-driven diffusion, electrostatic adsorption, and interfacial jamming─to form a rigid film with ultralow interfacial tension (∼0.66 mN/m). The resulting emulsion shows a bridged network structure and high stability. Microfluidic experiments reveal that stable oil-in-water emulsions form over a wide concentration range, with three distinct flow regimes (squeezing, dripping, and jetting) governed by capillary number and droplet size scaling as (D/Dh) ∝ Cac–1.5. The emulsion also exhibits fully reversible, CO2-responsive demulsification with minimal NCDs loss over cycles. Under simulated reservoir conditions, NCDs maintain ultralow tension and high elasticity in heavy oil, show good thermal and salinity stability, and enhance oil recovery by 33.45% over water flooding, demonstrating strong field potential. This work offers a sustainable strategy for developing efficient oilfield chemicals with lower cost and environmental impact.
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Journal of Physical Chemistry C
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2026
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IF 3.4
Chenfei Li,Mingzheng Gu,Juan Wang,Shuang Li,Ling Jiang,Yuerong Pei,Xiaojun Zhang
Copper-based electrocatalysts are regarded as highly efficient electrocatalysts due to their low cost and environmental friendliness. However, their practical application in water splitting remains severely limited by intrinsic drawbacks such as inferior electron transfer kinetics and moderate catalytic activity. Herein, we synthesized copper oxysulfide (CuSxO1–x) flake-like nanoflowers through a redox reaction and explored their application as efficient electrocatalysts for the oxygen evolution reaction. As expected, compared to the original CuS, the copper oxysulfides exhibited superior OER activity and stability, showing a remarkably low overpotential of 206 mV at a benchmark current density of 10 mA cm–2 for the OER. This study elucidates the reconstruction of copper oxysulfide electrocatalysts during the oxygen evolution reaction through in situ ATR-IR measurements. The facilitated formation of reaction intermediates and accelerated reconstruction kinetics during the structural evolution of copper oxysulfide synergistically contribute to its enhanced oxygen evolution reaction performance.
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ACS Applied Materials & Interfaces
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2026
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IF 7.8
Qi Feng,Yiyao Liu,Fei Pang,Lili Yang,Dengteng Ge
Smart optical films integrating multiple modalities (fluorescence, phosphorescence, transmission, and scattering) demonstrate significant potential for flexible displays and optical devices. However, fabricating such films remains challenging due to structural design complexity and material synthesis difficulties. Herein, a smart multimodal optical film (SMOF) is fabricated by embedding visible-light-excited phosphorescence nanoparticles (CD-SiO2 NPs) within the polydimethylsiloxane (PDMS) matrix. Notably, the optical properties of SMOF are dynamically tunable through mechanical deformation and visible-light excitation, which effectively circumvent the intrinsic limitations of ultraviolet (UV) excitation. In the released state, the SMOF architecture demonstrates exceptional UV–vis transmittance, which is attributed to the similar refractive index between the PDMS and SiO2 NPs. Concurrently, this film facilitates green-emissive fluorescence and phosphorescence under flashlight excitation, thereby eliminating UV-induced photodegradation. In addition, mechanical deformation will induce the formation of cracks and voids at the CD-SiO2 NPs and PDMS matrix, which can amplify light scattering and enhance the ability of CD-SiO2 NPs to absorb scattered light. These synergistic interfacial phenomena collectively govern the optomechanical switching behavior of the SMOF system, consequently achieving its broadband transmittance regulation while simultaneously amplifying the photoluminescence intensity. These distinctive optomechanical characteristics establish SMOF as a multifunctional platform, particularly suitable for stimuli-responsive privacy protection, UV-shielding applications, and persistent-luminescence-based traffic safety systems.
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ACS Catalysis
·
2026
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IF 13.6
Jingbin Huang,Chunhe Yu,Jie Zhu,Maoyuan Huang,Ziyu Zhang,Keke Zhang,Guanxin Zhang,Yuli Wang,Da Liu,Lin Jin,Renbing Wu
MoS2-based catalysts typically confront the critical challenge of balancing high catalytic activity and stability for the hydrogen evolution reaction (HER). This issue remains largely unresolved to date, seriously hindering their practical application. Herein, we develop a feasible molecule fence strategy to address this challenge by confining highly active Ni-doped MoS2 (Ni-MoS2) within a NiS2 fence featuring molecular selectivity. The combined density functional theory (DFT) calculations and in situ spectroscopy measurements reveal that the NiS2 layer as a molecule fence not only enhances the adsorption of H2O molecules but also protects Ni-MoS2 active components from the corrosion by O2 and OH– toxic species, thus greatly inhibiting the leaching of Ni-MoS2 as well as promoting its HER activity. Furthermore, the Ni-MoS2@NiS2-assembled anion exchange membrane water electrolysis (AEMWE) device can achieve a low voltage of 1.85 V to reach a current density of 1000 mA cm–2 and maintains a long-term operation for 1000 h. This study offers insights and valuable guidance for rational construction of electrocatalysts with high activity and stability.
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Shaohui Zhang,Qing Li,Suying Liu,Juan Luo,Yuke Gu,Xuanzhi Liu,Feng Liu,Pengfei Tan,Jun Pan
Defect fabrication is a practical nanosurface engineering to efficiently promote the oxygen reduction reaction (ORR) but remains a huge challenge. Herein, defect-rich ordered PtCu nanooctahedrons (D-PtCu-NOs) were prepared using Cl– as a shape-directing and etching agent. As a result, the D-PtCu-NOs catalyst achieves a mass activity of 1.147 A mgPt–1, which is 10.6-fold that of Pt/C. Meanwhile, the ordered and octahedral structures of the D-PtCu-NOs catalyst enable it to achieve an extremely high catalytic stability for 30,000 cycles. Convincingly, the D-PtCu-NOs catalyst also displays a higher peak power density and long-term durability than Pt/C in fuel cells. Besides, theoretical calculations reveal that the pore defects reduce the d-band center of Pt, lower the H2O formation barrier to boost the ORR activity, whereas the ordered structure inhibits the solubility of Pt and Cu, thereby improving the catalytic stability. This work highlights the importance of defect engineering for Pt-based nanocrystals to enhance the ORR.
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