JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 13
·1001
·
IF 3.2
Chen Huyue,Wang Jingrong,Lu Tengfei,Xu Deming,Xu Haiping,Yang Dandan,Chen Lifei
TiO 2 was deposited on the surface of Ti 3 C 2 T x MXene by the sol–gel method to construct core–shell structured MXene@TiO 2 fillers, which were then introduced into the PVDF matrix to prepare dielectric composite films. The effects of TiO 2 deposition ratio and filler loading on the dielectric properties of the composites were systematically investigated, and the thermal and mechanical properties of the optimized system were further evaluated. The results showed that the TiO 2 coating layer could construct an effective interfacial insulating structure, which enhanced interfacial polarization while suppressing carrier migration and the formation of leakage pathways, thereby enabling the synergistic regulation of dielectric constant and dielectric loss. When the TiO 2 deposition mass ratio reached 50%, the composites showed a more effective overall interfacial modulation effect. Under these conditions, the 15 wt% composite delivered the optimal overall dielectric performance, with a dielectric constant of 29.1 and a dielectric loss as low as 0.051, representing a significant reduction compared with that of the unmodified MXene/PVDF composite (0.59), and it also exhibited superior dielectric stability. At the same time, the thermal stability and mechanical performance of the composites were also enhanced. The study confirms that building a TiO 2 interfacial insulating layer is an effective approach to enhancing the dielectric performance of PVDF-based composites while realizing the coordinated optimization of multiple properties.
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高影响因子
Journal of Science-Advanced Materials and Devices
·
2026
·Vol. 11
·期 3
·101212
·
IF 6.9
Rui Ding,Jun Li,ZiJun Ye,JunXiang Mo,Jianguo Tang,Soowohn Lee
SnO 2 is a promising LIB anode material due to its high theoretical capacity and eco-friendliness, but suffers from low conductivity and severe volume expansion. This work synthesizes TiO 2 /graphene@SnO 2 (TiO 2 /G@SnO 2 ) core-shell nanofibers via coaxial electrospinning and calcination to address these limitations. The study focuses on optimizing the Ti/Sn molar ratio, finding that a 1:1.5 ratio (GST−2) delivers superior electrochemical performance. The GST−2 anode exhibits an initial discharge capacity of 986.4 mA h g −1 , charge capacity of 677.7 mA h g −1 , and initial Coulombic efficiency of 68.7%. It maintains 556.8 mA h g −1 after 100 cycles at 0.1 A g −1 , demonstrating exceptional cycling stability. Even at a high current density of 2.0 A g −1 , it retains 450.9 mA h g −1 , highlighting excellent rate capability. The optimized Ti/Sn ratio enhances structural stability without compromising overall capacity. These results confirm TiO 2 /G@SnO 2 core-shell nanofibers as a viable high-performance anode strategy for next-generation LIBs.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2026
·
IF 5.7
Zhen-Li Zhao,Lin-Dong Wang,Jun Chen,Han Li,Yao Rong,Li-Jia Niu,Jia-Xin Li,Jing Liu,Shokir Khojiev,Zhi-Yi Hu,Yu Li,Bao-Lian Su
3DOM NT-AH was obtained via synergistic reduction integrates Ni0/Ni2+ dual active centers and a NiO/TiO2 p-n heterojunction, enhancing electron transfer and charge separation to achieve a 16-fold increase in H2 evolution over unreduced 3DOM NT. Nickel oxide (NiO), owing to its tunable valence states and non-noble-metal cocatalytic properties, has shown great potential in photocatalytic hydrogen evolution. However, challenges remain in achieving highly dispersed loading, precise valence regulation, and optimized interfacial structures. Herein, we establish the Ni 0 /Ni 2+ dual active centers and NiO/TiO 2 p-n heterojunction in three-dimensionally ordered macroporous NiO x -TiO 2 -AH (3DOM NT-AH) composite photocatalyst for photocatalytic hydrogen production. In this unique structure, Ni 2+ species are favorable for forming a tightly coupled interfacial p-n heterojunction with TiO 2 , thereby promoting interfacial charge separation and directional carrier migration, while metallic Ni 0 acts as an efficient electron sink and electron-transfer mediator, facilitating rapid electron extraction and transport. Meanwhile, the highly dispersed NiO x nanoparticles are intimately anchored on the 3DOM TiO 2 (3DOM T) framework forming p-n heterojunction, further enhancing interfacial electron transfer and suppressing the recombination of photogenerated electron-hole pairs. The synergistic effect of the Ni 0 /Ni 2+ dual active centers and the p-n heterojunction makes that the optimized 3DOM NT-AH sample exhibits excellent photocatalytic hydrogen evolution performance, achieving a hydrogen evolution rate of 3.60 mmol·g −1 ·h −1 , which is about 16 times that of the unreduced 3DOM NiO-TiO 2 (3DOM NT) sample. This work provides a promising strategy for the design of efficient non-noble-metal Ni-based photocatalysts. Download: Download high-res image (201KB) Download: Download full-size image
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Peixin Dong,Yangkai Liu,Fulin Deng,Anning Zhao,Min Ren,Linjie Song,Yuanzhen Zhou,Yumeng Dong,Yunjie Xiang,Ugo D‘ Amora,Liqun Xu,Xi Rao
In 2 S 3 forms a Z-scheme heterojunction with TiO 2 , broadening the light response range, improving ROS generation. • Photothermal-photodynamic synergy reduces the required photothermal temperature. • The TiO 2 / In 2 S 3 /Chitosan composite coating exhibits enhanced antibacterial activity. • The composite coating exhibits excellent biocompatibility. Implant-associated bacterial infections remain a major challenge in orthopedic and dental applications, often compromising implant integration and longevity. For this reason, the synergistic antibacterial strategy of photothermal and photocatalysis has become one of the important methods in the field of antibacterial. To synthesize high-efficiency near-infrared (NIR) light-responsive catalysts, a titanium oxide/indium sulfide (TiO 2 /In 2 S 3 ) heterojunction antibacterial coating was prepared on the titanium-based surface using anodic oxidation and wet chemical deposition methods. Compared with titanium alloy, the TiO 2 /In 2 S 3 heterojunction showed a suitable energy band structure, improved light absorption, and enhanced carrier separation capability, thus enhancing photothermal catalytic activity and promoting the production of bacterial reactive oxygen species under NIR light. Indeed, the TiO 2 /In 2 S 3 heterojunction narrowed the bandgap (~2.5 eV) and efficiently generated reactive oxygen species (•O₂⁻ and •OH) under NIR irradiation. Furthermore, the successful deposition of chitosan (CS) endowed the TiO 2 /In 2 S 3 heterojunction with osteogenic activity, promoting the proliferation and differentiation of osteoblasts. In vitro , results demonstrated effective antibacterial performance against Escherichia coli and S taphylococcus. aureus , inhibited biofilm formation, and supported collagen secretion and mineralization. In vivo , NIR irradiation raised the implant site temperature to below 50 °C, enabling safe and efficient sterilization, and showing no organ toxicity. These results highlight CS-coated TiO 2 /In 2 S 3 heterojunction as a promising multifunctional coating that combines infection control with osteogenic support, providing a potential strategy for improving the safety and longevity of titanium-based implants. Download: Download high-res image (156KB) Download: Download full-size image
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PubMed
高影响因子
NANOTECHNOLOGY
·
2026
·Vol. 37
·期 16
·165601
·
IF 2.9
Jingming Li,Weizhang Zhao,Xuefei Wang,Guoqiang Luo,Rong Tu,Hao Wang,Qiang Shen,Lianmeng Zhang
The refractive index (RI) of acrylic acid polymer is crucial for their optical applications and can be improved by hybridizing with titanium dioxide (TiO2). However, the size of the dispersed TiO2 nanoparticles affects the transparency of their hybrid materials, while their crystallinity influences the RI. Simultaneously optimizing both properties presents a significant challenge. In this work, we employ an acetic acid-mediated solvothermal method to synthesize TiO2 nanoparticles. We show that this method uniquely enables the simultaneous achievement of high crystallinity and small aggregate size (≈35 nm) which overcomes the typical trade-off between these two critical parameters. The increase in crystallinity is attributed to the acidolysis process of acetic acid. After being modified by oleyl phosphate (OP), TiO2 nanoparticles are well dispersed in acrylic monomers and successfully UV-cured into a hybrid film. The resulting hybrid films maintained high transmittance (>80%) in the range of 400–800 nm. The increased crystallinity of TiO2 in the hybrid film raises its RI from 1.54 to 1.97. These superior optical properties directly benefit from the unique synergy of small size and high crystallinity achieved by the synthesis method, highlighting its potential for advanced optical device applications.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Xiaojing Tian,Zhiqi Qu,Jiaoyang Wang,Ying Zhang,Zhiping Li,Dandan Peng
Construct TiO 2 @MIL-101-Fe S-scheme via impregnation in situ hydrolysis. • Hierarchically distributed TiO 2 maximizes interfacial contact. • Achieves 13.91% cyclohexane conversion and retains high activity after five cycles. • Interfacial fields drive spatial charge separation and preserve redox potentials. • Hierarchical confinement and pore-mouth anchoring enable selective C H activation. The selective photocatalytic oxidation of cyclohexane is a sustainable and environmentally friendly route for KA-oil production, yet it remains limited by low conversion, moderate selectivity, and inefficient charge utilization. This study employed an in-situ TBOT hydrolysis strategy to synthesize a TiO 2 @MIL-101-Fe S-scheme heterojunction with hierarchically distributed TiO 2 nanodomains within the MOF pores, at pore mouths, and on the external surface. This spatially engineered heterostructure enhances photogenerated carrier separation, stabilizes the interface, and improves cyclohexane oxidation efficiency and KA-oil selectivity. The optimized 50 wt% composite material achieved a cyclohexane conversion rate of 14.3%, which was 2.17 times that of the original MIL-101-Fe material. Meanwhile, it still maintained a cyclohexane conversion rate of up to 13.9% and excellent catalytic activity after five cycles. Steady-state and time-resolved photoluminescence, electrochemical impedance, and transient photocurrent measurements reveal accelerated charge separation and prolonged carrier lifetime, enabled by an S-scheme heterojunction with a built-in interfacial electric field. Radical trapping and ESR studies indicate that photogenerated holes and electrons dominate C H activation, with reactive oxygen species contributing synergistically. DFT calculations confirm directional electron transfer and preserved high redox potentials. This work highlights spatially confined S-scheme heterojunctions as a general strategy to enhance photocatalytic efficiency, selectivity, and stability, offering a promising avenue for solar-driven hydrocarbon oxidation. Graphical abstract Download: Download high-res image (215KB) Download: Download full-size image
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CHEMICAL PHYSICS
·
2026
·
IF 2.8
Haoming Huang,Xi Wang,Xiaohui Zhang,Chenghang Li,Jing Zhang,Shan Qing,Zhumei Luo
TiO 2 /H 2 O NFs exhibit the highest stability at pH = 2 and pH = 12. • Near the IEP, electrostatic repulsion weakens, leading to particle aggregation. • Combined experimental and DLVO theory to analyze TiO 2 /H 2 O NFs stability. • Temperatures above 318 K and proximity to the IEP degrade TiO 2 /H 2 O NFs thermal performance. Nanofluids (NFs) attract attention in heat transfer due to high thermal conductivity, but nanoparticle aggregation limits their performance. Herein, 0.1 wt% TiO 2 /H 2 O NFs were prepared by a two-step method to investigate the effects of pH (2−12) and temperature (293–353 K) on their stability and thermal performance. Stability was highest at pH = 2 and 12, and the isoelectric point (IEP) was located at pH = 6.5. Near the IEP, weakened electrostatic repulsion promoted aggregation, as confirmed by particle size, Brownian-to-settling velocity ratio, and SEM observations. Derjaguin-Landau-Verwey-Overbeek (DLVO) theory showed that the reduced interaction energy barrier near the IEP increased aggregation, which raised relative viscosity, lowered thermal conductivity, and deteriorated the performance enhancement ratio (PER). The best PER values were obtained at pH = 2 and 12, consistent with the enhanced stability away from the IEP. This study provides a basis for optimizing NF stability and thermal performance via pH control for reliable thermal management. Stability and thermal properties of TiO 2 /H 2 O nanofluids at different pH values. Download: Download high-res image (294KB) Download: Download full-size image
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Jianghui Zhao,Zhaoyang Pan,Ping Liu,Jingjuan Huang,Wei Li,Ke Zhang,Xiaohong Chen,Fengcang Ma
The long-term clinical success of titanium-based implants is perpetually compromised by post-operative infection and suboptimal osseointegration. To address this dual challenge, we developed a defect-engineered, zinc-doped titania (Zn-TiO 2-x ) coating through a two-step process of micro-arc oxidation and subsequent alkaline reduction. This process endows the material with a profusion of oxygen vacancies (OVs), imparting significant absorbance in the near-infrared (NIR) spectrum. Upon 808 nm laser irradiation, this property translates into highly efficient photothermal conversion, which orchestrates a formidable, multi-modal antibacterial assault. The coatings exhibited exceptional bactericidal efficacy, achieving eradication rates of over 89% against S. aureus and 98% against E. coli . This potency stems from a synergistic trinity of hyperthermia via photothermal therapy (PTT), cytotoxic reactive oxygen species (ROS) generated through photodynamic therapy (PDT), and the intrinsic antimicrobial activity of released Zn 2+ . Concurrently, beyond antimicrobial prowess, the hierarchical porous microarchitecture acts in concert with the pro-osteogenic bioactivity of Zn 2+ to markedly enhance the adhesion, proliferation, and osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs). This study presents a versatile coating strategy for endowing titanium implants with dual therapeutic capabilities, opening new avenues for smart implants that actively combat infection and promote tissue regeneration.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Ziyuan Li,Jinran Zhang,Weiwei Zhao,Hongbo Jiang,Meijuan Tian,Jingman Pang,Weixing Zhao
In this study, TiO2 and anhydrous Na2CO3 were used as precursor materials to investigate the optimal conditions for synthesizing sodium titanate (Na2Ti3O7) by the molten salt method. The sodium titanate reactant was acid-exchanged to prepare titanic acid (H2Ti3O7), which was then calcined at different temperatures for varying durations. The resulting product was characterized by XRD, SEM, TEM, FE-SEM, and FTIR, confirming the formation of an H2Ti3O7/TiO2 composite. The photocatalytic degradation performance, mechanism, and stability of the H2Ti3O7/TiO2 composite were evaluated using rhodamine B as a model pollutant. The results indicated that the composite calcined at 800 °C for 3 h exhibited the fastest degradation rate. After the addition of peroxymonosulfate, the degradation efficiency reached approximately 100% within 30 min, which was higher than those of pure H2Ti3O7 and TiO2. The composite retained 94.56% of its original efficiency after four cycles, indicating excellent catalytic degradation ability. Quenching experiments revealed that the main active species were SO4˙−, ˙O2−, and ˙OH, and a possible degradation mechanism was proposed.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Hong Zhang,Jiao Chen,Yanqing Liu,Sheng Xue,Yang Zhao
TiO 2 (B)/anatase dual-phase nanowires/nanobelts were synthesized. • A R-P bivariate sensor was developed for seven NAC vapors. • Enhanced R-P responses were achieved with dual-phase nanowires/nanobelts. • Distinct R-P response patterns enabled vapor discrimination. Nitroaromatic vapor detection and discrimination remain challenging because of the low vapor pressures and high structural similarity of these analytes under ambient conditions. Here, a chemiresistive-potentiometric (R-P) bivariate gas sensor based on TiO 2 (B)/anatase dual-phase nanowires/nanobelts was developed for the discrimination of seven nitroaromatic vapors, including 2,4,6-trinitrotoluene, 2,4-dinitrotoluene, 2,6-dinitrotoluene, p-nitrotoluene, m-nitrotoluene, o-nitrotoluene, and nitrobenzene. Compared with the reference sensor fabricated from commercial single-phase TiO 2 nanoparticles, the nanowires/nanobelts-based sensor exhibited substantially enhanced bivariate responses, with 6.5–31.1 times higher chemiresistive responses and 1.3–2.1 times larger potentiometric responses toward the seven vapors. The improved sensing performance is attributed to the synergistic effects of abundant oxygen vacancies, dual-phase interfaces, and porous nanowires/nanobelts morphology. In addition, the nanowires/nanobelts-based sensor generated well-distinguished R-P fingerprints. A handheld prototype integrating dual R-P channels was also constructed for portable nitroaromatic vapor analysis. This work provides an effective strategy for developing low-cost and portable platforms for nitroaromatic vapor detection and discrimination. Download: Download high-res image (193KB) Download: Download full-size image
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DYES AND PIGMENTS
·
2026
·
IF 3.9
Linkai Zhao,Jing Zhao,Jiaying Hu,Zhao Mo,Ziyi Wang,Zhaoli Xue,Lei Feng,Long Zhao
Two zinc porphyrin-melamine complexes are designed for photocatalysis. • The two TiO 2 composites show similar morphology and light harvesting ability. • TPA-surpasses TPTZ-substituted samples for photocurrent and degradation. • All h + , .•OH and •O 2 − are the reactive oxygen species for photodegradation. • Cascade superiors competitive charge transfer for ROS generation. The generation efficiency of reactive oxygen species (ROS) typically governs the photodegradation performance. This work aims to compare two molecular design protocols in ROS photogeneration on TiO 2 nanoparticles. To this end, two zinc porphyrin-melamine conjugated complexes are designed, denominated as tri-TPTZ-ZnP-mel and tri-TPA-ZnP-mel, bearing triphenyltriazine (TPTZ) and triphenylamine (TPA) as the substituents, respectively. Our results demonstrate that the electron-withdrawing, planar tri-TPTZ-ZnP-mel induces intramolecular competitive electron transfer and accelerates charge recombination. In contrast, the electron-donating, three-dimensional structured tri-TPA-ZnP-mel suppresses molecular aggregation, promotes cascade charge transfer, and delivers significantly higher photocurrent, lower interfacial charge-transfer resistance, and superior photodegradation activity toward organic dyes. Mechanistic studies clarify the distinct roles of holes (h + ), hydroxyl radical (•OH) and superoxide radical (•O 2 − ) governed by substituent-driven charge transfer behaviours. Download: Download high-res image (309KB) Download: Download full-size image
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ACS Omega
·
2026
·Vol. 11
·期 32
·47638-47653
·
IF 5.2
Liu Yanchi,Sun Mohan,Qian Chengchao,Fu Yabo,Qiao Junwei,Wang Diangang,Shi Jiazi,Zhang Gaimei,Zhang Xinlin,Liu Hui
To overcome the poor
visible light response and high
recombination
rate of photogenerated carriers in bare TiO 2 , a Pt/Co 3 O 4 /TiO 2 photocatalyst was fabricated
via a template-assisted spontaneous galvanic replacement route. The
as-prepared material contains anatase–rutile mixed-phase TiO 2 , Co 3 O 4 , and metallic Pt and retains
a dodecahedral morphology with a high specific surface area of 122.64
m 2 /g. Under visible light irradiation for 120 min, its
degradation rates for tetracycline and methylene blue reached 85%
and 93%, respectively, which are significantly better than those of
pure TiO 2 and Pt/Co 3 O 4 . The composite
also exhibited excellent stability and recyclability. Its superior
performance is ascribed to the synergistic effects of the mixed-phase
TiO 2 , the p–n heterojunction between TiO 2 and Co 3 O 4 , the Schottky barrier at the Pt/TiO 2 interface, the localized surface plasmon resonance of Pt,
and the high adsorption capacity of the porous material. This work
offers a new strategy for treating dye- and antibiotic-containing
wastewater.
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高影响因子
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