MATERIALS CHEMISTRY AND PHYSICS
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2026
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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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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
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IF 8.7
Wanting Chang,Bingyang Liu,Pingzhang Yao,Jinsong Zeng,Pengfei Li,Wenhua Gao,Jinpeng Li,Jun Xu,Daxian Cao,Bin Wang,Kefu Chen
This study reports the development of a beeswax-based Pickering emulsion stabilized by TEMPO-oxidized cellulose nanofibers (TCNF) and titanium dioxide nanoparticles (TiO 2 ) as co-stabilizers, aimed at fabricating multifunctional coatings with enhanced hydrophobicity and UV-shielding performance. By systematically varying the TCNF: TiO 2 mass ratio (1:0 to 1:4), the structural characteristics of the composite stabilizers, emulsion stability, rheological behavior, and coating functionality were comprehensively evaluated. The results revealed a synergistic stabilization mechanism: TCNF imparted steric hindrance and electrostatic repulsion to suppress droplet coalescence, while TiO 2 reinforced interfacial mechanical integrity and contributed intrinsic UV-blocking capacity. At a TCNF: TiO 2 ratio of 1:3, the emulsion exhibited optimal comprehensive properties, including high emulsification efficiency, long-term storage stability (30 days), strong interfacial film formation, and a water contact angle exceeding 120° after coating application. Furthermore, the incorporation of TiO 2 significantly improved the UV shielding performance of the coating in both UVA and UVB regions, whereas TCNF reinforced the tensile strength of the paper substrate via hydrogen bonding and three-dimensional network formation. Overall, this work establishes a sustainable strategy for the functionalization of cellulose-based materials and highlights the potential of bio-inorganic composite Pickering emulsions in eco-friendly packaging, specialty papers, and green protective coatings.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Chao Chen,Meng-Han Li,Ya-Yun Ma,Guo-Zhi Han
Photo-deposition method has the advantages of simplicity, environmental friendliness, and high efficiency, and has been widely used in the field of materials preparation. In this paper, we firstly prepared hollow black TiO 2 microspheres by template method, then using the mesoporous hollow microspheres as a carrier, NiCl 2 ·6 H 2 O as raw material, a novel kind of hollow Ni(OH) 2 @TiO 2 composite microspheres was prepared by photochemical deposition. Characterization of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), fluorescence spectrophotometry (PL), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FT-IR) indicated that the two units of TiO 2 and Ni(OH) 2 in the composite hollow microspheres form tightly chemical connections. More importantly, this chemical connection endowed the two functional units with mutually enhanced catalytic performance for reduction of aromatic nitro compounds and photocatalytic degradation of emerging organic pollutants. For example, it can catalyze the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by NaBH 4 with a k value of 0.8457 min −1 , as well as degrade tetracycline hydrochloride (TCH) with a degradation rate of 92.29% within 60 min with a k value of 0.0606 min −1 , which is superior to most previous reports. Finally, based on a series of control experiments, a plausible mutually enhanced catalytic mechanism was proposed.
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JOURNAL OF BIOMATERIALS APPLICATIONS
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2026
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IF 2.4
Wen Han,Yijiao Yuan,Yurong Chen,Wei Wang,Chunhui Lu
Peri-implantitis, a leading cause of dental implant failure, is primarily attributed to suboptimal soft tissue sealing at the implant-tissue interface, which facilitates bacterial colonization and subsequent inflammatory responses. Surface modifications on titanium can expedite good soft tissue sealing and antibacterial action. We engineer titanium surfaces with ultraviolet light-functionalized titanium dioxide nanotubes (UV-TNTs) to achieve good soft tissue sealing and antibacterial effect. Surface properties were characterized via scanning electron microscopy (SEM), surface roughness analysis, wettability assessment and methylene blue (MB) degradation. Antibacterial performance was quantified using Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) viability assays. Soft tissue integration was evaluated through fibroblast proliferation assays and immunofluorescence staining of vinculin and collagen type I. The UV-TNTs demonstrated significantly enhanced antibacterial efficacy and promoted fibroblast proliferation, adhesion and collagen deposition to improve soft tissue sealing. This surface modification strategy offers a promising approach for enhancing implant biocompatibility and long-term stability, offering useful references for advanced implant design and fabrication.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2026
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IF 6.7
Yunpeng Xu,Dongbo Zhang,Ziwen Ma,Qiu Liu,Jicheng Yu
Amantadine (AMN) is a persistent and structurally recalcitrant antiviral contaminant. In this work, a recoverable Pt/TiO2 porous ceramic composite was fabricated by photodeposition and ceramic immobilization for UV-driven AMN degradation. Under Box-Behnken-optimized conditions (1.5 wt % Pt loading, catalyst dosage 2.0 g/L, and initial pH 9.0), AMN removal reached about 72% within 4 h, and the catalyst retained >50% removal after six cycles with low Pt leaching. Scavenger experiments indicated that h+ and •O2– were the dominant reactive species, and HPLC-MS identified six transformation products, from which two tentative degradation pathways were proposed. QSAR-based evaluation suggested lower bioaccumulation potential and reduced developmental toxicity for most terminal products, although incomplete predictions for some species warrant caution. These results support immobilized Pt/TiO2 photocatalysis as a practical strategy for AMN-contaminated water treatment.
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Exploration
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2026
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IF 30.4
Weiwei Wang,Chun Lu,Xiaoxiao Liu,Wenlong Yang,Jie Zhou,Chenyao Hu,Xin Li,Guangze Nie
Sonopiezo-mediated heterogeneous catalysis is a promising technology for efficient removal of organic pollutants from wastewater. Nevertheless, it is challenging in real water matrix with coexisting ions due to the rather-limited selectivity of reactive oxygen species if any. Herein, a sonopiezo-triggered singlet oxygen evolution system for selective removal of tetracycline hydrochloride (TCH) was rationally designed by SrTiO 3 -TiO 2 heterojunction with a TiO 2 -terminated SrTiO 3 S-scheme interfacial structure. SrTiO 3 -TiO 2 heterojunction exhibits a dramatically expanded piezoelectric constant ( d 33 ), which produces a synergistic effect on improving the separation and transfer efficiency of charge carrier for efficient TCH degradation. Moreover, SrTiO 3 -TiO 2 heterojunction presents a high sonopiezo-current, which attractively indicates that SrTiO 3 -TiO 2 heterojunction has a potential capacity of charge separation under sonopiezo initiation. Remarkably, the mechanism was identified as the continuous generating of singlet oxygen ( 1 O 2 ), in which the sonopiezo-generated electrons trigger the formation of superoxide anion radical (•O 2 − ) and its subsequent transformation to generate 1 O 2 by expending more sonopiezo-generated holes. These findings provided new insights towards developing nonradical system for effective and selective oxidation of electron-rich pollutants via sonopiezo-catalytic process.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Yubing Yin,Changsong Zhou,Linghan Zhang,Qingyan Meng,Qiangqiang Ren,Shengyu Xie,Zhen Zhang,Hao Wu,Hongmin Yang
Photocatalytic removal of trace methane at room temperature is hindered by low partial pressure, weak adsorption, and sluggish C H bond activation. Here, anatase T(100), T(101), and their ZnO-modified counterparts were evaluated in a closed CH 4 /air system containing approximately 400 ppm CH 4 . Under the standard humidification protocol, the measured inlet water-vapor concentration was 30,900 ± 600 ppmv (3.09 ± 0.06 vol%). ZnO modification enhanced apparent CH 4 removal, reaching 91.70 ± 0.49% for 10%ZnO-T(101) after 1 h of UV irradiation. The 5%ZnO samples were selected for mechanistic comparison because they retained a more pronounced facet-associated difference. HRTEM and UV-Raman confirm the presence of nanoscale crystalline ZnO domains in intimate contact with anatase TiO 2 . PL, transient photocurrent, and EIS indicate improved charge separation and interfacial transport for 5%ZnO-T(101), while TPD, XPS O 1 s, and EPR support weaker retention of CO 2 /carbonate-related species and stronger light-induced ·OH and ·O 2 − signals. At approximately 1000 ppm CH 4 , 10%ZnO-T(101) achieved a CH 4 conversion of 78.46 ± 0.57%, a CO 2 mineralization yield of 60.78 ± 0.50%, and a gas-phase carbon closure of 85.43 ± 0.50%. CO 2 accounted for 77.47 ± 0.68% of converted carbon and CO for 3.96 ± 0.31%; the unclosed 14.57% carbon fraction may include low-abundance oxygenated intermediates, surface-associated carbon species, and analytically unresolved trace products. Four humid-state cycles retained 97.56 ± 0.24% of the initial activity. These results highlight facet-associated ZnO/TiO 2 contact effects involving improved charge utilization, H 2 O/O 2 activation, and product-species regulation.
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APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Yufei Hu,Jie Li,Liming Xu,Danqin Li,Wenjing Zhou,Meisi Yu,Jiashuo Lv,Furui Lin,Weiqiang Zhou
Rare-earth-stabilized oxygen vacancies unlock highly active Pt/TiO 2 photoelectrocatalysts. • Urchin-like hollow TiO 2 spheres maximize defect exposure, light harvesting, and mass transport. • All rare-earth-doped catalysts outperform undoped OV-THS/Pt in methanol oxidation. • OV-Pr-THS/Pt achieves 5793 and 8790 mA mg −1 under dark and light, respectively. • Pr doping and oxygen-vacancy engineering synergistically accelerate charge transfer and MOR kinetics. Pt-based catalysts with high activity and durability are essential for direct methanol fuel cells. While TiO 2 substrates offer promise for photoelectrocatalytic methanol oxidation, their performance is limited by poor charge separation and slow kinetics. In this work, oxygen-vacancy-rich rare-earth-doped TiO 2 urchin-like hollow spheres (Nd, Eu, Ce, and Pr) were constructed as advanced supports for Pt nanoparticles, enabling simultaneous regulation of defect chemistry and morphology. Among the prepared catalysts, OV-Pr-THS/Pt exhibits the best activity, delivering 5793 mA mg −1 in the dark and 8790 mA mg −1 under light irradiation, markedly higher than the undoped counterpart. These findings demonstrate that the synergistic integration of rare-earth doping and oxygen-vacancy engineering provides an effective strategy for designing high-performance photoelectrocatalysts for sustainable energy conversion. Download: Download high-res image (126KB) Download: Download full-size image
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Polymers
·
2026
·Vol. 18
·期 13
·1602
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IF 5.8
Ting Zhang,Junhao Liang,Bin Wang,Bohua Wen,Zhengyang Xi,Xuyang Zhao,Xinhai He
(1) Background: The development of biodegradable polymers with enhanced functionality is critical for advancing sustainable packaging technologies. This study addresses the challenge of simultaneously improving the structural rigidity and functional performance of poly(lactic acid) (PLA) materials. (2) Methods: Cellulose nanowhisker (CNW) and TiO 2 nanoparticle (Nano-TiO 2 ) reinforced PLA porous composite films were fabricated via a nanoparticle-assisted breath figure method. The effects of these hybrid nanoparticles on the morphology, thermal stability, and structure of the resulting composites were systematically investigated. (3) Results: The incorporation of CNWs and Nano-TiO 2 played a dual role: they acted as Pickering-like stabilizers at the water/polymer interface, preventing droplet coalescence and facilitating the formation of a well-defined honeycomb-like porous structure. They also significantly enhanced the relative crystallinity of the PLA matrix from 20.26% to 36.31%, owing to the heterogeneous nucleation effect. Consequently, the mechanical properties were significantly enhanced, with the maximum tensile strength and Young’s modulus increasing by 123.3% and 21.9%, respectively. Furthermore, the composite films exhibited excellent UV-shielding performance, achieving an SR UV-B of 97.6%. (4) Conclusions: The synergistic reinforcement of CNWs and Nano-TiO 2 effectively endows PLA composites with superior mechanical properties and functional protection. These findings establish the CNWs-Nano-TiO 2 /PLA composite film as a promising candidate for high-performance smart packaging applications.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jiang Yu,Lixin Xu,Huijian Ye
The development of polymer-based dielectric materials with simultaneously enhanced dielectric permittivity and energy-storage capability is of great importance for next-generation electronic and electrical devices. In this work, polyetherimide (PEI) composite films have developed by incorporating in-situ synthesized TiO 2 @BaTiO 3 (BTO) core–shell functional nanobars to achieve enhanced interfacial polarization. The TiO 2 @BTO particles are prepared through a sequential hydrothermal route, in which TiO 2 serves as the template for the growth of BTO shell. Owing to the one-dimensional core–shell architecture, the TiO 2 @BTO/PEI composite with enlarged interfacial area demonstrates the regulation of the local electric field in the polymer matrix. The incorporation of TiO 2 @BTO particles significantly enhances the dielectric constant, polarization response, and energy-storage performance of composite. The 0.5 wt% composite exhibits the outstanding overall performance, showing a favorable balance among dielectric enhancement, electrical reliability, and energy-storage behavior, e.g. energy density of 12.3 J cm −3 and charge-discharge efficiency of 85% at 400 MV m −1 . The improved energy storage property is mainly attributed to the synergistic effects of the highly polarizable BTO shell and the Maxwell–Wagner–Sillars interfacial polarization. The rational design of one-dimensional core–shell nanofillers is an effective strategy for developing high-performance PEI-based dielectric composites for capacitive energy-storage applications.
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ACTA PHYSICO-CHIMICA SINICA
·
2025
·
IF 13.5
Wenlong Wang,Wentao Hao,Lang He,Jia Qiao,Ning Li,Chaoqiu Chen,Yong Qin
S-scheme heterojunctions have garnered significant interest in photocatalytic CO 2 conversion to valuable products (e.g., CH 4 ) due to their enhanced charge separation and robust redox capabilities. Carbon dots (CDs), with their tunable band structures and light absorption ranges, show particular promise in constructing efficient S-scheme photocatalytic systems. Nevertheless, the critical roles of CDs' band alignment and surface adsorption properties in determining heterojunction configuration, charge carrier kinetics, and ultimately CO 2 activation/product selectivity distribution remain insufficiently explored. Herein, we construct four CDs/TiO 2 heterojunctions using CDs synthesized from varied carbon sources, in which S-scheme heterojunctions were successfully constructed based on cost-effective coal pitch (C-GQDs, 1.75 nm), glucose (G-CQDs, 1.84 nm), and acetone (CQDs-X, 1.82 nm) carbon sources, whereas Type-I heterojunctions were formed by carbon black based CDs (GQDs-A, 1.92 nm). Systematic investigations reveal that both the band structure and adsorption characteristics of CDs play important roles in the charge transfer path and separation efficiency, CO 2 adsorption and activation capacities, and product selectivity in photocatalytic CO 2 reduction. Remarkably, the introduction of CDs significantly broadens the photo-response range compared to fresh TiO 2 , and in particular, the C-GQDs/TiO 2 exhibits exceptional performance with a CH 4 production rate of 32.7 μmol·g −1 ·h −1 , surpassing TiO 2 by 6.3-fold and outperforming GQDs-A/TiO 2 , CQDs-X/TiO 2 , and G-CQDs/TiO 2 by factors of 3.8, 2.7, and 2.3, respectively. This heterojunction simultaneously achieves 72.6 % CH 4 selectivity and 98.1 % hydrocarbons selectivity (encompassing CH 4 , C 2 H 6 , C 2 H 4 , and C 3 H 8 ). In contrast, composites incorporating GQDs-A, CQDs-X, or G-CQDs exhibit substantially diminished CH 4 selectivity (<40.0 %). The high CH 4 production rate and selectivity of C-GQDs/TiO 2 can be attributed to its unique S-scheme heterojunction structure, higher reduction potential, and well-matched CO 2 and H 2 O adsorption and activation capabilities. This study provides unique insights into the efficient photoreduction of CO 2 to CH 4 driven by the S-scheme heterojunction electron transfer pathway in CDs/TiO 2 photocatalysts.
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Small
·
2025
·
IF 12.1
Bocong Zou,Hulin Wang,Runchao Dong,Jia Zhang,Zhiheng Liu,Yan Lin,Zhicheng Zhu,Xiangyang Hu,Weijun Li,Dongdong Zhang,Xiaoxiao Li,Lin Wang,Huan He,Weiyou Yang,Fengmei Gao,Shanliang Chen
The precise control of the surface properties of low-dimensional nanostructures is a prerequisite for preserving the intrinsic material quality and manipulating the carrier transport behavior to enhance optoelectronic device performance. Herein, a high-responsivity photoelectrochemical (PEC) ultraviolet (UV) photodetector (PD) based on SiC/TiO 2 heterojunction nanowires is developed. The surface of SiC nanowires is decorated with high-quality TiO 2 nanoparticles through a simple hydrothermal process, and a type-II heterojunction is established. The fabricated SiC/TiO 2 heterojunction nanowire PEC PD exhibited excellent photoresponsivity with high responsivity (50.97 mA W −1 ), detectivity (1.07 × 10 12 Jones), and external quantum efficiency (16.85%) under 375 nm ultraviolet illumination. Response and decay times are as low as 0.3 and 0.1 ms, respectively—these values are within the state-of-the-art range for semiconductor nanostructure–based PEC PDs reported thus far. The device also exhibits excellent photoresponsivity and long-term stability under different light intensities, even in harsh universal-pH liquid environments, including acidic, neutral, and alkaline solutions with different concentrations. The elevated photodetection performance of the device is primarily attributed to the effective synergistic effect of the formation of a type-II charge transfer pathway in the SiC/TiO 2 heterostructure, the optimal load capacity of TiO 2 nanoparticles, and the excellent inherent corrosion resistance of SiC and TiO 2 .
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