POLYMER
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2026
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IF 5.1
Jiapeng Ye,Deming Zhou,Lifan Li,Chenji Zhang,Leyan Li,Kun Luan,Zaixing Zhang,Lingxiao Jing,Ruizhi Xue,Tonghua Zhang
Poly(p-phenylene-2,6-benzobisoxazole) (PBO) fiber, made from a rigid-rod isotropic crystal polymer, exhibits exceptional tensile strength, thermal stability, and creep resistance, surpassing Kevlar fiber (one of high-performance bullet proof fibers) with twice the strength and modulus. However, UV exposure cleaves the oxazole rings in PBO’s molecular structure, leading to decreased crystallinity, reduced mechanical strength, and limited suitability for outdoor applications. This study introduces a novel surface enhancement method using an olefin addition reaction with an azobenzene polyepoxy (Bt-APDB-BA-GMA) coating for Ultraviolet (UV) resistance. Further combining this with nano titanium dioxide (TiO 2 ) forms an organic-inorganic layer for additional protection. Comparative studies were conducted on three samples, including original PBO fibers (PBO), PBO fibers modified with azobenzene/epoxy copolymer (PBO/azo-epoxy), and PBO fibers modified with both azobenzene/epoxy copolymer and nano TiO 2 (PBO/TiO 2 @azo-epoxy). Modified fibers showed significant improvements: PBO/TiO 2 @azo-epoxy exhibited a 63 % higher pull-out strength (34.58 MPa) and retained 78.2 % tensile strength after 288 hours of UV aging, compared to 28.2 % for unmodified fibers. This innovation enhances PBO fiber durability, UV resistance, and interfacial bonding, paving its way for broader applications in body armor, aircraft, and advanced technologies.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Dongqi Fan,Zicheng Wang,Yuan Tian,Cheng Wang
Abstract The inherent Li dendrite growth, notorious shuttle effect, and severe redox reaction kinetics of lithium polysulfides (LiPSs) impede the feasibility of practical development of lithium–sulfur (Li–S) batteries. Herein, a bi-functional defect-rich TiO2–x/SrTiO3–x nanocube, embedded in a N-doped carbon (NC) freestanding fabric, was prepared and effectively used as a sulfur host and an interlayer between the separator and lithium anode for Li–S full batteries. The spontaneous formation of a built-in electric field (BIEF) between TiO2–x and SrTiO3–x guides self-driven charge rearrangement, resulting in strong directional LiPS migration to boost sulfur redox kinetics and fast, uniform Li+ transfer to avoid Li dendrite growth. Meanwhile, the introduction of oxygen vacancies can induce a ferroelectric phase and provide more active sites for lithium/sulfur storage. The whole 3D framework, enabled with fast electron/ion transport, reduces the Li nucleation overpotential and lowers the energy barrier for LiPS conversion. Consequently, Li||Li cells with the TiO2–x/SrTiO3–x@NC interlayer cycled stably over 600 h at 5 mA cm–2 and 5 mAh cm–2. Furthermore, Li–S full batteries delivered 1285 mAh g–1 at 0.1 C with merely 0.074% per-cycle capacity decay. Our findings emphasized the efficacy of a defect-rich TiO2–x/SrTiO3–x ferroelectric heterostructure implanted into a 3D conductive framework.
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高影响因子
JOURNAL OF CATALYSIS
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2026
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IF 6
Yun-Jie Li,Dong Wang,Bi-Xi Wang,Zhen-Yi Du,Wen-Ying Li
Eliminated Ni particle size effects to isolate intrinsic SMSI effects. • Decoupled the roles of Ni sites and interfacial Ni-O v -Ti 3+ sites. • Exposed Ni sites serve as the primary sites for H 2 activation and hydrogenation. • Interfacial Ni-O v -Ti 3+ sites promote oxygenated intermediate deoxygenation. • Balancing Ni encapsulation and oxygen vacancies maximizes HDO activity. Efficient hydrodeoxygenation is essential for upgrading biomass- and coal-derived oils into high-quality fuels. Although strong metal–support interactions (SMSI) have been employed to promote hydrodeoxygenation, how SMSI-induced metal encapsulation and oxygen vacancy generation individually and collectively govern hydrodeoxygenation remains unclear. To eliminate the confounding influence of Ni particle size, a series of Ni@TiO 2− x catalysts with uniform Ni particle sizes but tunable SMSI strengths were engineered through tailored pretreatment strategies. Using a remarkably simple kinetic strategy, the mixed roles of Ni sites and oxygen vacancies were successfully decoupled, proving that Ni encapsulation inhibits hydrogenation while oxygen vacancies drive deoxygenation. Consequently, the catalyst with intermediate SMSI strength strikes an optimal balance by maximizing the density of oxygen vacancies while mitigating excessive metal encapsulation, thereby delivering the highest hydrodeoxygenation activity. Density functional theory calculations further demonstrate that interfacial Ni-O v -Ti 3+ sites enhance the adsorption of oxygenated intermediates and markedly lower the C–O bond activation barrier. The cooperative interplay between exposed metallic Ni sites and interfacial Ni-O v -Ti 3+ sites orchestrates H 2 activation and C–O bond cleavage, thereby enabling efficient hydrodeoxygenation and providing a design principle for SMSI-regulated interfacial catalytic systems. Download: Download high-res image (159KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Asim Mushtaq,Khai Ly Do,Muhammad Yousaf,Saiquan Li,Miao Su
Thermo-adaptive injectable silk-hydrogel conforms dynamically to irregular wound beds. • Au-TiO 2 /ICG nano-assemblies for image-guided localization • NIR-triggered hyperthermia/ROS generation synergistic antibacterial treatment • IVIS-guided tracking of the hydrogel's delivery and retention • Multifunctional platform helps improve wound repair with excellent biocompatibility. Infection and chronicity of wounds pose an intimidating problem in clinical practice, necessitating a system that would be able to dynamically adjust to the changes in the wound bed, delivering antibacterial effects and monitoring them simultaneously. Herein, a thermo-adaptive injectable hydrogel using Au–TiO 2 –PF127–ICG (ATI) nanocomposites loaded in a silk hydrolysate-PEG 400 -gelatin (SPG) matrix has been developed, integrating mechanical adaptability, phototherapy, biocompatibility, and imaging functionality in a single construct. The hydrogel is stable at room temperature while undergoing gel-sol phase transition at physiological temperature, thus allowing simple injection and in situ shaping within irregular wounds. Rheological analysis confirmed a distinct gel–sol transition near physiological temperature, validating its thermo-adaptive nature. Upon NIR 808 irradiation, the incorporated indocyanine green (ICG) efficiently converted light into heat, while the Au–TiO 2 nanocomposites along the ICG produced reactive oxygen species (ROS), resulting in a dual photothermal/photodynamic antibacterial effect against E. coli and S. aureus . Infrared thermal imaging and IVIS fluorescence visualization further confirmed localized photothermal responsiveness and sustained hydrogel retention at the wound site, enabling fluorescence-assisted image-guided localization and monitoring. Furthermore, in vivo studies revealed accelerated wound closure, enhanced collagen deposition, and favorable histological regeneration under NIR stimulation, signifying the hydrogel's regenerative potential. Overall, this ATI-SPG hydrogel demonstrates a harmonious combination of injectability, self-adaptivity, fluorescence-enabled image-guided localization, NIR-triggered multimodal antibacterial therapy, and wound healing capability, providing a promising platform for next-generation light-responsive materials for wound management.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Guowei Zhang,Zhanhui Peng,Xiaobin Zhou,Qingqing Li,Junjie Meng,Di Wu,Lingling Wei,Pengfei Liang,Zupei Yang,Xiaolian Chao
Oxygen vacancies in (Al x In 1- x ) 0.0025 Nb 0.0025 Ti 0.995 O 2 ceramics are regulated by tuning the Al 3+ /In 3+ acceptor ratio at a fixed Nb 5+ donor content. • The sample with x = 0.4 achieves optimal dielectric performance: ultrahigh permittivity 2 × 10 4 and low dielectric loss ~0.05 over broad frequency and temperature ranges. • Al 3+ enrichment contracts the rutile lattice, reduces oxygen vacancies, and modulates Ti 3+ states and local lattice distortion. • Impedance, modulus and Arrhenius analyses verify thermally activated Ti 3+ /Ti 4+ carrier hopping and oxygen vacancy related dielectric relaxation in the ceramics. • Oxygen-vacancy dipoles and IBLC/SBLC interfacial polarization synergistically yield colossal permittivity in grain/grain-boundary heterostructures. TiO 2 -based colossal permittivity ceramics show promising potential for energy storage applications and sensing due to their superior dielectric performance and tunable defect structures. (Al x In 1− x ) 0.0025 Nb 0.0025 Ti 0.995 O 2 ceramics were fabricated via a solid-state reaction method, aiming to tailor oxygen vacancy defects through acceptor-ion substitution. With increasing Al content, the E g Raman mode exhibits a pronounced shift, indicating significant modulation of local lattice distortion and oxygen-vacancy concentration. Remarkably, the composition with x = 0.4 an excellent balance between dielectric permittivity and loss, exhibiting a dielectric constant of ~ 2 × 10 4 and a low dielectric loss of ~0.05. Detailed impedance and modulus analyses reveal that the observed dielectric relaxation originates from thermally activated Ti 3+ /Ti 4+ hopping and oxygen vacancy related defect responses. Combined with the electrically heterogeneous microstructure consisting of semiconducting grains and insulating grain boundaries, the colossal permittivity behavior is primarily attributed to an IBLC/SBLC-related polarization mechanism. Overall, a high dielectric constant can be achieved via defect engineering and triple doping modulation, providing a viable strategy for the design of next-generation dielectric capacitors.
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高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Yalin Yang,Wei Lu,Yunsheng Xu
The selective oxidation of styrene to styrene oxide (SO) is a pivotal transformation in fine chemical synthesis. Conventional thermocatalytic routes suffer from unresolved critical issues: overoxidation, poor selectivity, and environmental incompatibility. Herein, a Cs 3 Sb 2 Br 9 (CSB)/TiO 2 composite photocatalyst was constructed by coupling lead-free halide perovskite CSB with wide-bandgap semiconductor TiO 2 for highly selective styrene epoxidation under mild conditions. CSB incorporation extends the composite's photoresponse to the visible region. Mechanistic investigations confirm that under visible-light excitation (λ > 420 nm), only CSB is photoexcited. Photogenerated electrons directionally transfer from CSB to the unexcited TiO 2 (acting as an electron mediator), These electrons reduce O 2 to ·O 2 - , while holes in CSB oxidize styrene and can convert ·O 2 - to 1 O 2 , shifting the reaction from C=C cleavage to selective epoxidation. At an optimal CSB loading of 0.18 mmol, the composite achieves a total reaction rate of 27.23 mmol ·g -1 ·h -1 (9.13-fold higher than pure TiO 2 ) and an SO selectivity elevated from 42.25% to 82.28%. Concurrently, the epoxide production rate reaches 22.40 mmol ·g -1 ·h -1 , representing 17.78-fold over that of pure TiO 2 (1.26 mmol·g -1 ·h -1 ). XPS analysis reveals a positive shift in Br 3d and negative shift in Ti 2p binding energies, verifying directional electron transfer from CSB to TiO 2 . Radical quenching experiments and EPR spectroscopy demonstrate that photogenerated electrons reduce O 2 to ·O 2 -, holes further convert ·O 2 - to 1 O 2 . This regulation of reactive oxygen species shifts the reaction pathway from competitive C=C bond cleavage to selective oxygen-transfer epoxidation. This work provides a novel material design strategy and mechanistic insights for constructing efficient, highly selective photocatalytic oxidation systems.
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NEW JOURNAL OF CHEMISTRY
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2026
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IF 2.6
Lanshu Zhao,Baolin Yan,Bo Yang,Xinyu Zhao,Linxin Zhang,Shiyan An,Huaize Han,Yihan Liu,Yi’an Peng,Yuhua Dai,Jianxiang Yu
Tetracycline (TC) contamination in aquatic environments poses significant risks owing to antibiotic resistance gene dissemination and ecotoxicity. Integrating adsorption with photocatalysis offers a promising strategy for pre-concentrating contaminants at photocatalytic adsorbent surfaces while enabling solar-driven mineralization. Herein, a novel hierarchical mesoporous CeO2/TiO2 composite was constructed by transforming a Ti-based metal–organic framework, MIL-125-NH2 (NM), which serves as a highly efficient photocatalytic adsorbent for the treatment of high-concentration TC solutions. Remarkably, it delivered a high equilibrium adsorption capacity of 146.4 mg g−1 for TC within 240 min, significantly outperforming pristine NM by approximately 9.3 times. Moreover, its removal efficiency can further attain 93.1% for the high-concentration TC solutions (50 mg L−1) under simulated solar irradiation, and it remains above 80% after three successive cycles. The hierarchical porous structure enables a rapid TC preconcentration, while Ce–O–Ti heterointerfaces facilitate efficient charge separation and interfacial reactions. This work validates a facile MOF-templating approach for designing bifunctional composites that couple efficient adsorption with solar photocatalysis, offering significant potential for treating recalcitrant antibiotic pollutants in wastewater systems.
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Materials
·
2026
·Vol. 19
·期 11
·2317
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IF 3.7
Jiahui Xu,Xueying Zhang,Xiaohui Ma,Jiachen Liu
High-emissivity coatings on flexible fibrous fabrics are promising thermal-insulation materials for thermal protection systems in hypersonic vehicles. However, the interfacial bonding strength between the high-emissivity coating and the flexible fibrous substrate remains a critical challenge. A high-emissivity double-layer TiO2interlayer modified by metal ions (Mg2+, Co2+, Ni2+, and Zn2+) with high-entropy (M2+@TiO2-HE) coating was developed on an aluminosilicate fiber fabric. The interlayer of the M2+@TiO2-HE coating not only enhances bonding strength through mechanical interlocking but also improves thermal insulation performance by acting as an infrared reflective layer. The bonding strength between the M2+@TiO2-HE coating and the ASFF substrate showed an 183% enhancement compared to that of the single-layer high-emissivity high-entropy coating. Under one-sided heating at 1400 °C, the backside temperature of the coated ASFF stabilizes at 330 °C, which is approximately 50 °C lower than that of the sample with the single-layer high-emissivity high-entropy coating. In the wavelength range of 0.3–2.0 μm, the average reflectivity of the M2+@TiO2coating was 0.70, and in the wavelength range of 1–14 μm, the average emissivity of the M2+@TiO2-HE coating was 0.89. The M2+@TiO2-HE coating with high emissivity and reflectivity enhances both the bonding strength and thermal insulation performance of ASFF, showing its potential for applications in aerospace thermal protection systems.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zheng Li,Jie Li,Jing Guo,Fucheng Guan,Xin Zhang,Qiang Yang,Da Bao,Xinbin Ji,Yihang Zhang,Minghan Li,Jiahao He,Yi Xu
Silver-doped titanium dioxide (Ag-TiO 2 ) demonstrates superior photocatalytic degradation capabilities, making it an ideal material for eliminating organic dyes. In this study, a nanofiber material exhibiting both high-efficiency photocatalytic degradation performance and antibacterial activity was successfully fabricated as polyvinyl alcohol nanofibers modified with protocatechualdehyde and loaded with silver-modified titanium dioxide (Ag-TiO 2 /DPVA NFs). The heterojunction structure of Ag-TiO 2 significantly broadens the visible light absorption range of TiO 2 (from 200 to 350 nm to 200–800 nm). Experimental results indicate that under visible light irradiation, Ag-TiO 2 /DPVA NFs achieved an 89 % degradation rate of Rhodamine B (Rh B) within 6 h (with C/C 0 reduced to 0.11), which is significantly superior to TiO 2 /DPVA NFs. Moreover, Ag-TiO 2 /DPVA NFs exhibited antibacterial rates of 99.1 % against Staphylococcus aureus ( S. aureus ) and 98.3 % against Escherichia coli ( E. coli ), demonstrating excellent antibacterial performance. Ultimately, the obtained Ag-TiO 2 /DPVA nanofibers demonstrate great potential for simultaneously achieving photocatalytic and antibacterial applications in the field of applications in water remediation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenjie Guo,Jiaping Cai,Yisha Zheng,Wenlong Xiang,Juan Xu,Yanhui Zhang
Titanium dioxide - bismuth oxybromide (TiO 2 -BiOBr) composites were successfully prepared using simple one-step grinding, which not only simplifies the production process but also establishes a solid foundation for mass production. Notably, the morphology of BiOBr synthesized by solvothermal significantly affects the performance of the materials after compounding; however, further investigations revealed that the interfacial effects in these composites were not markedly superior to those prepared using the solid-phase grinding method. The composites fabricated through the grinding technique exhibited substantially enhanced photocatalytic activity compared to those produced by conventional solvothermal. This enhancement can be primarily attributed to the interfacial interactions that promote synergistic catalytic effects between TiO 2 and BiOBr. Moreover, the grinding process roughens the material surface and significantly increases its specific surface area, thereby enhancing light scattering and absorption, and optimizing light utilization. Under visible light conditions, the 5 % TiO 2 -BiOBr composites demonstrates outstanding photocatalytic performance under visible light irradiation, achieving 92 % degradation efficiency for ciprofloxacin (CIP) while maintaining excellent stability across various antibiotics. Furthermore, this material exhibits remarkable CH 4 selectivity in CO 2 photoreduction. Collectively, these findings indicate that the low-cost and high-performance composites synthesized via grinding offer a practical solution for antibiotic wastewater treatment. The novelty of this study lies in the proposal of a low-cost and efficient synthesis method. It points to a new direction for the preparation of photocatalytic materials. This representing a significant advancement in environmental pollution control.
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IONICS
·
2025
·
IF 2.6
Yong Daming,Kang Xiaomeng,Yin Ming,Wu Qichao
First, a spherical Fe 3 O 4 was synthesized using the hydrothermal method, and subsequently coated with carbon to form a core–shell C/Fe 3 O 4 composite. The Fe 3 O 4 core was then dissolved in an etching solution to create a hollow carbon (H-C) structure. This H-C served as a substrate onto which a Fe 3 O 4 layer was deposited via the hydrothermal method, resulting in a hollow core–shell Fe 3 O 4 /C composite. Finally, the solvothermal method was employed to coat the Fe 3 O 4 /C composite with a layer of hydrogenated titanium dioxide (H-TiO 2 ), resulting in a hollow-structured H-TiO 2 /Fe 3 O 4 /C material. This structure not only ensures the formation of a dual-core shell structure, but also reduces the proportion of carbon material in the composite electrode, thereby enhancing the theoretical specific capacity of the composite electrode. The presence of H-TiO 2 and carbon improved the cyclic stability of Fe 3 O 4 within the composite. This hollow sandwich–structured composite demonstrated excellent electrochemical performance, delivering a discharge specific capacity of 629.5 mAh g −1 after 500 cycles at 0.2 A g −1 , along with a high initial coulombic efficiency of 80.6%.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenqiang Cao,Xiyu He,Xiyang Cai,Qiaodan Hu,Junliang Zhang,Fan Yang
Electrocatalytic nitrate reduction offers a sustainable approach to ammonia synthesis while simultaneously addressing nitrate contamination. Electrocatalysts with high activity, long durability and affordable cost are essential for advancing this field. This study demonstrates that Fe-doped TiO 2 nanoparticles synthesized by a simple hydrothermal route exhibit competitive electrocatalytic performances for nitrate-to-ammonia conversion. A faradaic efficiency (FE) of 82.3 %, an ammonia yield of 5.953 mg·cm −2 ·h −1 , and a selectivity of 85 % can be achieved and maintained in 10 cycles with a total duration of 60 h in alkaline electrolyte. These metrics substantially outperform the pristine TiO 2 . Defect chemistry analysis and DFT calculations reveal that Fe doping creates oxygen vacancies, and introduces impurity energy levels in the bandgap to improve the electrical conductivity of TiO 2 . Fe and oxygen vacancies synergistically modulate the nitrate adsorption energy, and the Fe active site further reduces the energy barrier for the rate-limiting step and suppresses the competing reactions, thereby effectively promoting ammonia synthesis.
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