ACS ES&T Engineering
·
2026
·
IF 6.3
Yao Chen,Tianle Hu,Jianwei Ai,Quansheng Zhou,Xinyi Su,Yuchen Zhang,Hanchen Zhang,Shuhui Guan,Zhenfeng Bian,Hiromi Yamashita
Photocatalytic dissolution of precious metals (PMs) relies critically on the generation of specific reactive intermediates; however, the rational control of radical species in visible light remains challenging. Herein, we introduced the cyano (−CN) group into g-C3N4 (denoted as g-C3N4–CN), achieving a remarkable enhancement in the dissolution efficiency of precious metals under visible light. The −CN group not only promotes the visible-light absorption of g-C3N4–CN, but also facilitates the separation of photogenerated charges. The electron paramagnetic resonance (EPR) spectroscopy further demonstrates that g-C3N4–CN instantaneously generates superoxide radicals (O2•–) via efficient oxygen reduction while simultaneously promoting the rapid production of alkyl radicals (R•) through solvent oxidation. In contrast, pristine g-C3N4 exhibits a sluggish generation of all radical species. The distinct radical generation kinetics of g-C3N4–CN is identified as the key driver for its superior dissolution efficiency, enabling precious-metal recovery rates by 2–4 times and establishing a radical-targeted strategy for sustainable photocatalysis.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Ti Feng,Feng Tian,Huangyao Chen,Long Jie Zhang,Jun Zhang,Chaoyong Deng,Ruirui Cui
In the pursuit of environmentally friendly luminescent materials, lead-free double perovskites (LFDPs) have emerged as a promising candidate, distinguished by their unique photophysical characteristics. Concurrently, the development of a single-component phosphor capable of generating stable, full-spectrum white light presents a formidable challenge, standing in contrast to the prevalent multi-phosphor systems used in contemporary white light-emitting diodes (WLEDs). Here, we report the design and synthesis of a triple-doped Cs 2 NaYCl 6 : Sb 3+ , Tb 3+ , Mn 2+ material, achieving single-phase white light emission. In contrast to the pristine Cs 2 NaYCl 6 host, which displays only weak sky-blue luminescence, a remarkable augmentation in the intensity of its self-trapped exciton (STE) emission is observed upon Sb 3+ doping. The enhanced STE-based emission can be primarily attributed to the novel sensitizing state introduced by Sb 3+ doping. The effective STE energy transfer to Tb 3+ and Mn 3+ under Sb 3+ sensitization overcomes the inherent drawbacks of efficiency and color rendition in single-matrix WLEDs. The white light emission can be precisely tuned by simply adjusting the doping ratios. A WLED device was fabricated by integrating the as-synthesized phosphor with a 340 nm UV chip. The device exhibited promising white light performance, yielding a correlated color temperature (CCT) of 5133 K, a color rendering index (CRI) of 92.1, and CIE coordinates of (0.3422, 0.3587), thereby validating its strong potential for practical white lighting applications.
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MATERIALS CHEMISTRY AND PHYSICS
·
2026
·
IF 5.2
Kuanping Gong,Yongquan Jiang,YongMan Choi
We describe the synthesis and characterization of CaSe 1-x S x :Eu (0 ≤ x ≤ 1) phosphors, uniformly coated with alternating metal oxide layers via a customized fluidized-bed chemical vapor deposition (FB-CVD) technique. Through precise sintering control, the phosphor composition is engineered for tunable red emission under 450 nm blue excitation. First-principles calculations show that Eu 2+ substitution introduces localized Eu 4f states just below the conduction band minimum, enabling efficient blue excitation and red emission, while sulfur substitution enhances lattice stability by increasing intrinsic chalcogenide migration barriers. This energy-level configuration explains efficient Eu 2+ luminescent center activation, yielding intense red emission. Moreover, Se substitution with S increases the anionic migration barrier progressively, consistent with experimental observations of CaSe 1-x S x degradation in humid environments due to Se's inherent instability. However, this moisture susceptibility is markedly reduced via uniform, conformal FB-CVD barrier coatings on individual phosphor particles. Stabilized CaSe 1-x S x phosphors serve as promising components in high-performance warm white light-emitting diodes (W-LEDs), enabling blue-to-red light conversion. As a result, fabricated W-LEDs retain >95% of initial luminance after 1000 h of operation, with negligible chromaticity coordinate shifts.
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Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Guo Hengjie,Meng Zeda,Lee Keonha,Oh Won-Chun
This study prepared carbon nanotube-modified BiFeO₃ (CNT‑BiFeO₃) composite photocatalysts for visible‑light‑driven degradation of ammonia nitrogen. The introduction of CNTs promotes the separation of photogenerated carriers and constructs a type‑II heterojunction with an internal built‑in electric field, which effectively suppresses electron‑hole recombination and improves photocatalytic activity. The optimized CNT‑BiFeO₃ catalyst achieves an ammonia degradation efficiency of 87.43% under visible light. With the assistance of 0.2 mmol/L H₂O₂, the degradation efficiency reaches 99.8% within 180 min, and ammonia is selectively converted into N₂ without generating nitrite or nitrate. Kinetic analysis indicates that the degradation process follows pseudo‑first‑order kinetics. The composite shows excellent reusability and stability during cycling tests. This work provides a high‑efficiency photocatalytic strategy for ammonia nitrogen removal from wastewater.
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Cell Reports Medicine
·
2026
·
IF 14
Ziqiao Zhong,Lu Gan,Yihong Gao,Siyuan Peng,Yeqi Huang,Xincheng Lin,Jintao Fu,Ziyi Feng,Zhengwei Huang,Xin Pan,Chuanbin Wu,Wenhao Wang,Ying Huang
Fatty acid-rich milieu is recognized as a potential key factor driving postsurgical tumor recurrence, while insufficient drug delivery to irregular surgical margins further compromises therapeutic effects. We find that this milieu directly drives lipid droplet accumulation in tumor-associated macrophages (TAMs), promoting M2 polarization, which can be reversed by rapamycin (Ra) via enhanced lipid droplet metabolism. Accordingly, we design a light-driven thermotropic hydrogel (LTG@RL) encapsulating a nanomodulator (R@LOX) containing lipoxygenase and Ra. Upon photothermal irradiation, LTG@RL undergoes reversible gel-sol transition for deep cavity penetration and sustained retention. R@LOX coordinates lipid intervention. It uses tumor-derived fatty acids to generate lipid peroxides, inducing ferroptosis in residual cancer cells, while repolarizing TAMs to the M1 phenotype to restore immune surveillance. In postsurgical melanoma and breast cancer models, LTG@RL suppresses tumor recurrence, prolongs survival, and also exhibits activity in non-surgical melanoma models. This strategy integrates lipid intervention and enhanced cavity delivery, offering precision prevention of postsurgical recurrence.
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PubMed
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International Journal of Extreme Manufacturing
·
2026
·Vol. 8
·期 5
·055101
·
IF 25.1
Mingyue Cao,Wenxin Wang,Xingyu Yang,Wei Zhu,Xiaolong Zhu,Yinfeng He,Feng Chen,Xiaoxiao Han
Light scattering remains a critical barrier in digital light processing (DLP)-based ceramic additive manufacturing, particularly for achieving high precision, fine resolution, and complex geometries. In this study, we present a novel light scattering mitigation strategy by incorporating a multifunctional reactive additive that combines physical light absorption near 405 nm and chemical free radical scavenging. Curcumin effectively suppresses undesired photopolymerization in non-target regions by neutralizing scattered-light-generated radicals, enabling the fabrication of intricate structures with dimensional fidelity approaching the optical resolution limit (∼2.6 pixels). The strategy operates effectively at low concentrations (0.01 wt%) without requiring process parameter tuning, offering a broad process window and high reproducibility. Furthermore, the strategy is generalizable across diverse ceramic systems, including light-colored ceramics (Al2O3, ZrO2, and SiO2), and dark-colored ceramics (SiC) that are particularly susceptible to scattering. The geometric error of printed SiC components remains below 10% even at high exposure doses of 80 and 100 mJ·cm−2, effectively addressing the long-standing trade-off between curing depth and lateral resolution. This work provides a simple, scalable, and versatile approach for improving resolution in DLP ceramic printing, advancing the reliable production of fine-scale (<50 μm) ceramic architectures for applications in biomedicine, microelectronics, and precision engineering.
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Limo Wang,Bingjie Xu,Xinting Dong,Danfeng Jian,Tianming Lu,Yujie Gao,Jindan Wu
The misuse of antibiotics has resulted in multidrug resistance among bacteria, rendering nearly all conventional antibiotics ineffective and creating a pressing global need for highly efficient and broad-spectrum antibacterial alternatives. Photodynamic antibacterial therapy (PDAT) has emerged as a promising strategy to address bacterial resistance; however, its efficacy is limited by inherent challenges such as poor tissue penetration, short diffusion ranges, and brief half-lives of reactive oxygen species (ROS). In this study, we developed an antibacterial composite nanofiber membrane with red light responsiveness by incorporating functional l-arginine-modified PCN-224 nanoparticles (Arg-PCN NPs), which enabled NO-enhanced synergistic PDAT. Specifically, Arg-PCN NPs were synthesized and subsequently embedded into a polylactic acid (PLA) matrix by electrospinning, yielding a porous nanocomposite membrane (APM). Under irradiation, APM showed a strong synergistic antibacterial effect, and the bactericidal rate against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) reached 99.9%. Comprehensive mechanistic studies revealed that APM potently enhanced bacterial membrane permeability and elevated intracellular ROS levels upon irradiation. Furthermore, cytotoxicity assays confirmed that APM exhibited negligible in vitro cytotoxicity. The red light-activated antibacterial membrane developed in this work holds significant potential for wound care applications and provides a design strategy for advanced antibacterial materials capable of combating drug-resistant bacterial infections.
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Journal of Materials Chemistry A
·
2026
·
IF 9.2
Xinwen Gao,Yuyang Zhang,Wenyang Huang,Yuhan He,Tingting Yu
Light-driven micromotors are easily accessible and controllable without tethering, but their development faces challenges due to the need for monochromatic light, tracking difficulties, and environmental limitations. In this work, we present Hexagon-BiVO4 micromotors that exhibit exceptional photocatalytic efficiency and enable effective multi-wavelength propulsion in pure water under low-intensity illumination at 365, 455, 530, and 660 nm, without requiring complex optical systems. Unlike non-fluorescent particles, their photoluminescence allows detection at 4× magnification for wide-field tracking over a 17 mm working distance. This tracking capability has been validated in dark blood samples. Additionally, the micromotors sustain stable movement in complex media containing glycerol, urea, or glucose, and exhibit ionic tolerance after modification. Finally, we demonstrate their versatility in contaminated river water, with movement observed under low-intensity mercury light, and confirm their ability to decompose and remove pollutants from various water sources. Combining broad‑spectrum actuation, photoluminescence, and environmental resilience, this platform offers potential for versatile applications in targeted therapy and environmental cleanup.
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Small
·
2026
·
IF 11.8
Yinuo Yang,Ning Zhu,Yisong Liu,Ziye Zhang,Weiwei Zhao,Hongyu Zhang
Dry eye disease (DED) is driven by tear film instability and increased blink-induced interfacial friction, exacerbating epithelial injury and inflammation. The conventional treatments, including artificial tears and hydrogel/contact-lens approaches, all fail to achieve sustained friction control due to limited lubrication durability, rapid clearance, surface dehydration, and foreign-body sensation. Here we developed a light-triggered hydration-lubricating nanoplatform (PAM@HK) that simultaneously restored ocular surface lubrication and enabled on-demand anti-inflammatory therapy. PAM@HK was assembled from an amphiphilic block copolymer that integrated a phosphorylcholine segment to form a robust hydration layer for hydration lubrication and an azobenzene hydrophobic segment for light-switchable honokiol (HK) release. The tribological tests under blink-relevant load and shear revealed that PAM achieved ultralow friction across macroscopic and microscopic scales, evidencing stable hydration lubrication. The near-infrared light irradiation triggered reversible photo-isomerization to greatly accelerate HK release on demand. In DED mouse model, PAM@HK markedly restored corneal integrity and tear film stability, increased tear secretion, preserved conjunctival goblet cells, and suppressed interleukin-6, reactive oxygen species, and pathological keratinization. This work positioned hydration lubrication as a primary therapeutic approach for DED and provided a new low-invasive, light-programmable strategy with superior durability and mechanistic relevance over conventional passive lubrication intervention.
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Materials
·
2026
·Vol. 19
·期 12
·2602
·
IF 3.7
Bin Wang,Xinyu Shi,Qianping Wang,Xinrui Jiang,Wanqi Wang,Hui Chen
The development of sustainable, noble-metal-free photocatalytic systems for acceptorless dehydrogenation (ADH) of cyclic amines remains a significant challenge. Herein, we report a novel heterogeneous photocatalyst constructed by covalently grafting a cobaloxime-based proton reduction catalyst onto a photosensitive covalent organic framework (PT-COF). The tailored PT-COF scaffold, featuring a donor–acceptor architecture and uncondensed amino groups, serves as both an efficient visible-light harvester and a porous support for cobalt active sites. The resulting Co-PT-COF hybrid exhibits excellent photocatalytic activity for the ADH of a wide range of cyclic amines, affording the corresponding N-heteroarenes in 62–95% yields under an Ar atmosphere at 28 °C with blue LED irradiation for 12 h in water. Notably, the catalyst demonstrates outstanding recyclability over five consecutive cycles with minimal loss of activity or cobalt leaching. Comprehensive photoelectrochemical and spectroscopic studies reveal that enhanced charge separation and efficient electron transfer from the photoexcited COF to the cobalt centers underpin the superior performance. Mechanistic investigations, including in situ EPR spectroscopy, confirm the involvement ofα-amino radical intermediates in the catalytic cycle. This work establishes a sustainable platform for solar-driven dehydrogenation chemistry and provides a versatile blueprint for integrating molecular catalysts with photoactive frameworks.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123509
·
IF 7.5
Yihong Xu,Yingcai Wang,Yinshan Zhang,Gang Xiong,Zhibin Zhang,Yunhai Liu
Nuclear energy expansion drives increasing uranium demand, yet acidic in-situ leaching generates toxic, radioactive wastewater that poses severe ecological and health risks. Conventional treatment methods face efficiency, cost, and operational constraints, necessitating high-performance adsorbents. Here, we report a phosphate-functionalized MXene composite hydrogel (P(AM-VPA)/MXene) synthesized via in-situ polymerization for uranium capture. The material demonstrates exceptional mechanical stability, efficient photothermal conversion, a Langmuir-estimated maximum monolayer adsorption capacity of 1376.75 mg·g −1 at pH 6, high selectivity for uranium over competing metal ions, and 89.8% capacity retention after six adsorption-desorption cycles. Under visible light irradiation, adsorption efficiency increases by 18.4% due to accelerated ion diffusion. MXene reinforcement optimizes the hydrogel’s porous architecture while providing abundant active sites, synergizing with phosphate groups to enable chemisorption-dominated uranium binding. This work provides a phosphate-functionalized MXene-hydrogel design that integrates U(VI)-binding phosphate groups, MXene-induced structural reinforcement, recyclability, and photothermal-assisted adsorption, offering a complementary strategy for uranium-bearing wastewater treatment.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Jinxing Yu,Ri Han,Shu Jin,Xiaoxiang Xu
BiFeO 3 is a narrow-bandgap semiconductor promising for solar water splitting but is generally subject to a low photocatalytic activity due to the poor separation of photocarriers (e − and h + ). In this work, BiFeO 3 has been combined with BaTiO 3 to form the solid solutions (i.e. (BiFeO 3 ) 1-x (BaTiO 3 ) x (0 ≤ x ≤ 1)) which demonstrate a much-improved activity for photocatalytic H 2 production under visible light illumination. The solid solution strategy not only tunes the bandgap but also modifies the dielectric constant that is critical for a high photocatalytic activity. A high dielectric constant contributes to an improved photocarrier separation condition due to the screening of the Coulomb interactions between photocarriers and between photocarriers and charged defects. This work reveals a useful solid solution strategy to modify the photocatalytic performance and justifies the importance of dielectric properties for photocarrier separation.
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