Small
·
2026
·
IF 11.8
Tianshuo Liu,Yale Cui,Xinyu Xie,Wenqing Chen,Jia Liu,Xiaowei Chen
Magnesium hydride (MgH 2 ) is hampered by sluggish kinetics despite its high capacity. Here, we report a solvent-free, single-step mechanochemical strategy that drives the in situ reconstruction of titanium oxide acetylacetonate into a self-derived, high-coverage TiO 2 nanolayer on MgH 2 surfaces. Unlike conventional discrete particle catalysts, this surface-anchored TiO 2 phase maximizes the interfacial contact area. Kinetic analysis establishes a direct link between this high-coverage interfacial topology and nucleation-governed kinetics: the ubiquitous distribution of interfacial active sites shifts the dehydrogenation mechanism to be primarily controlled by 2D nucleation and growth, while rehydrogenation is initially driven by rapid surface-chemisorption. Consequently, the composite unlocks exceptional kinetic activity at low temperatures, releasing 4 wt.% H 2 at 186°C and absorbing 5.8 wt.% H 2 at 26°C within 10 h, retaining 99% capacity over 100 cycles. Density functional theory elucidates the atomistic origin of this enhancement: the unique TiO 2 /MgH 2 band alignment channels electrons from hydrogen vacancies into Ti 3 d states. This interfacial electronic polarization significantly stabilizes hydrogen vacancies and lowers the desorption activation barrier to 81 kJ mol −1 , validating the interface-dominated kinetic model. This work demonstrates that interfacial topological engineering via in situ reconstruction is a critical pathway to overcoming the kinetic bottlenecks of solid-state hydrogen storage.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123137
·
IF 7.5
Fenhong Song,Ruibo Zhang,Qi Qi,Long Ma,Gang Wang,Wenguang Wang,Jing Fan
The narrow light-absorption range and fast charge carrier recombination in semiconductor photocatalysts remain major bottlenecks limiting photocatalytic hydrogen evolution efficiency. In this work, SnO 2 /g-C 3 N 4 /TiO 2 ternary Type-II heterojunctions were rationally constructed via a hydrothermal-calcination two step strategy. Triethanolamine (TEOA) was employed as a sacrificial agent during the photocatalytic hydrogen production reaction. Different from traditional simple component mixing, SnO 2 is deliberately designed as an electron mediator to bridge g-C 3 N 4 and TiO 2 , forming a directional cascade charge transfer channel for efficient carrier separation. DFT theoretical simulations further verify that the introduction of TiO 2 optimizes the band structure, reduces the work function, and promotes interfacial electron transfer, thus significantly enhancing photocatalytic performance. The optimized 0.20SnO 2 /g-C 3 N 4 /TiO 2 sample delivers a maximum H 2 evolution rate of 4.80 mmol/g/h, 2.38-fold higher than that of bare TiO 2 . Stability assessments confirmed the material's exceptional cycling durability, a characteristic primarily ascribed to the establishment of type II heterojunctions. This architectural configuration facilitates effective segregation and mobility of photoinduced charge carriers while simultaneously suppressing recombination of electron-hole pairs. The materials' superior photoelectrochemical characteristics further enhance their capacity for light-driven hydrogen generation through catalytic processes. These discoveries provide new perspectives and innovative approaches for engineering high-performance photocatalytic systems.
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高影响因子
CATALYSIS TODAY
·
2026
·
IF 5.1
Shuang Wang,Shuo Wang,Xiao-Qian Feng,Huan Wang,Xuelan Hou,Jin Ye,Yong-Hua Zhao
TiO 2 is a widely studied photocatalyst, but its practical performance is limited by poor light utilization and rapid recombination of photogenerated charge carriers. Herein, a TiO 2 -ZIF-8 heterojunction with a chemically bonded interface was constructed through the formation of Ti-O-Zn interfacial bonds. This design integrates the strong adsorption capacity of ZIF-8 with improved charge separation and transfer across the heterojunction. The optimized TiO 2 -ZIF-8 composite showed markedly enhanced photocatalytic activity, achieving 94.6% degradation of methylene blue within 120 min under simulated solar irradiation. Its apparent rate constant reached k = 0.01508 min -1 , which is 1.55 and 2.38 times higher than those of pristine TiO 2 and ZIF-8, respectively. XPS, FTIR, TEM, and PL results confirm the successful construction of the heterojunction and reveal the key role of Ti-O-Zn bonding in strengthening interfacial interaction and facilitating photogenerated carrier migration. Meanwhile, the strong interfacial interaction improved the structural stability of the composite and helped inhibit nanoparticle agglomeration during photocatalysis. Overall, this work provides new insight into the design of high-performance MOF-based photocatalytic systems through interfacial chemical bond engineering.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Nan Zheng,Xinyue Liu,Meng Lan,Xiaoli Dong,Yubo Zhang
Co-TiO 2-x with abundant OVs made via one-step hydrothermal. • Optimal sample: high NH 3 yield, good stability & selectivity. • Co & OVs enhance N 2 adsorption/activation for sustainable NH 3 . Photocatalytic nitrogen fixation represents a promising green technology for ammonia synthesis, but its efficiency is largely limited by the adsorption and activation of N 2 molecules on catalyst surfaces. In this study, cobalt-doped brown TiO 2-x with abundant oxygen vacancies was successfully synthesized via a simple one-step hydrothermal method. The brown TiO 2-x exhibits excellent light absorption capacity and abundant oxygen vacancies. Cobalt doping further promotes the separation of photogenerated charge carriers and the photocatalytic reduction ability of brown TiO 2-x , while also inducing the generation of additional oxygen vacancies (OVs). These OVs serve as active sites, effectively improving the adsorption and activation of N 2 , and subsequently reducing it to ammonia. Experimental results demonstrate that the photocatalytic nitrogen fixation performance of the Co doped TiO 2-x is significantly improved. The as-fabricated 7%Co-doped TiO 2-x sample achieves an ammonia production rate of 257.58 μmol·g −1 ·h −1 . In addition, it also exhibits good stability and NH 3 selectivity. This work highlights the promise of coupled doping and defect engineering for creating high-efficiency photocatalysts for sustainable ammonia production. Download: Download high-res image (365KB) Download: Download full-size image
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COMPOSITES PART B-ENGINEERING
·
2026
·
IF 14
Liang Zhou,Muhaiminul Islam Shakil,Jingyi He,Xiyue Zhang,Hongbo Wang
Metal-organic framework (MOF)-derived carbon materials exhibit significant advantages for microwave absorption applications, owing to their high electrical conductivity, structural tunability, and abundant intrinsic defects and heterogeneous interfaces. However, achieving an optimal balance between magnetic and dielectric losses remains challenging for most magnetic metal-based MOFs-derived absorbers. In this study, MIL-125(Ti) was prepared as a template, and TiO 2 @C-x composites were synthesized via a two-step pyrolysis method. Experimental results demonstrate that the pyrolysis temperature significantly affects the graphitization degree of the carbon matrix and the formation of TiO 2 nanoparticles, thereby playing a dominant role in the dielectric and microwave absorption properties of the investigated MIL-125(Ti)-derived core-shell TiO 2 @C composites. Notably, the TiO 2 @C-700 composite delivers an effective absorption bandwidth of 3.2 GHz in 9.2-12.4 GHz at a thickness of 2.01 mm. Therefore, the MIL-125(Ti)-derived TiO 2 @C composites fabricated in this study establish a viable and nonmagnetic strategy for designing tunable, lightweight, and high-performance MOF-derived microwave absorbers.
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Surfaces and Interfaces
·
2026
·
IF 6
Ke Liu,Lairong Xiao,Yu Zhang,Zhenwu Peng,Yuxiang Jiang,Yi Liang,Siyuan Tang,Wei Li,Xiaojun Zhao
Etching basalt scales boosts active sites and area, enhancing modification efficacy. • A micro-nano structure (EB/TiO₂) improves coating abrasion resistance effectively. • Excellent corrosion resistance results from a stable air layer during immersion. • Nano-TiO₂ can significantly improve the dispersion properties of basalt scales. Superhydrophobic coatings have increasingly demonstrated unique advantages in corrosion protection for marine engineering applications. However, their practical engineering implementation is often constrained by three key limitations: complex preparation processes, difficulties in large-scale application, and poor mechanical durability. Addressing these challenges, this study develops a multifunctional superhydrophobic coating suitable for room-temperature preparation and scalable application. Stable and cost-effective basalt scales serve as the microstructure foundation for robust superhydrophobic structures. Chemical etching is employed to activate the reactive sites on the basalt scale surfaces. By leveraging the silane bonding characteristics of 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane, the construction of low surface energy treatment and the micro-nano hierarchical structures of basalt scales modified by nano-TiO 2 are accomplished in a single step. The resulting multifunctional superhydrophobic coating exhibits a water contact angle of 155.4°, retaining over 150° even after 60 friction cycles. In a 3.5 wt% NaCl solution, the impedance modulus at 0.01Hz (|Z| 0.01 Hz ) reaches which is six orders of magnitude higher than that of the bare substrate. Additionally, the coating demonstrates exceptional durability and self-cleaning properties. Notably, the entire preparation process is conducted at room temperature, significantly facilitating large-scale engineering applications, mass component processing, and commercial translation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Chenyi Zhang,Zhenyu Wan,Jiangjie Zhang,Jinni Shen,Chengwei Qiu,Wenxin Dai,Zizhong Zhang
Dual-site Au/Ta-TiO 2 photocatalyst was designed to photocatalytic oxidative coupling of methane. • The incorporation of Ta as an n-type dopant TiO 2 , promoting the reduction of molecular oxygen to superoxide radicals (O 2 • − ). • Au nanoparticles effectively promoted C C coupling. • Au 1wt% /Ta 0.03 -TiO 2 achieved an ethane production rate of 25 mmol∙g −1 ∙h −1 with a C 2+ selectivity of 83%. The photocatalytic oxidative coupling of methane (OCM) offers a promising green route for carbon utilization but is hindered by low conversion rates and over-oxidation. Herein, we engineer a dual-site Au/Ta-TiO 2 photocatalyst that achieves high-performance OCM. The incorporation of Ta as an n-type dopant effectively modulates the electronic structure of TiO 2 , providing abundant localized electrons that promote the reduction of molecular oxygen to superoxide radicals (O 2 • − ). It subsequently participates in the oxidative cycle, ultimately regenerating water and thereby enhancing CH 4 activation. Meanwhile, Au nanoparticles serve as sites for methyl radical coupling, curbing over-oxidation. The concerted catalysis on these two sites leads to outstanding OCM performance. An optimized Au/Ta-TiO 2 catalyst yields a methane conversion rate of 25 mmol∙g −1 ∙h −1 and 83% selectivity towards C 2+ products in a flow reactor that exceeds most reported photocatalysts. This work provides new insights into achieving high-performance photocatalytic methane conversion by precisely driving oxygen activation. This work designs a Ta-doping and Au-loading dual-site TiO 2 photocatalyst to improve the selective conversion of methane to ethane under aerobic conditions for sustainable chemical production. Download: Download high-res image (133KB) Download: Download full-size image
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高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 13
·e06882
·
IF 2.3
Yu-Ping Zhang,Chang-Hua Zhao,Hong-Li Dou,Pei Yuan
Ultrasonic- and microwave-assisted methods are progressive techniques used in synthesizing nanocomposites on different inorganic, organic, or hybrid supports. In this study, one-step synthesis of Fe 3 O 4 @TiO 2 (FT) core-shell nanoparticles was conducted by combining ultrasound- and microwave-assisted solvothermal methods. The composites were fabricated using a central magnetic Fe 3 O 4 core, with in situ formation of the outer TiO 2 coating. The surface of FT was further modified via polydopamine(PDA), and the as-prepared Fe 3 O 4 @TiO 2 @PDA composites (FTP) were successfully used as photocatalysts to effectively remove methylene blue (MB) in an aqueous solution. The pH, photocatalyst dosage, initial MB concentration, and temperature influences were investigated under 254 nm UV light. Additionally, the changes in the physicochemical properties of the nanocomposites were analyzed using transmission and scanning electron microscopy, Fourier transform infrared spectroscopy, x-ray powder diffraction, and vibrating sample magnetometry. The as-prepared FTP composites exhibited excellent efficiencies (99.9%) in the adsorption and photocatalytic degradation of 20 ppm MB in neutral or basic conditions over 30 min. Compared with previous reports about Fe 3 O 4 @TiO 2 composites, the modified PDA layer enriched MB molecules via hydrogen bonds and strong electrostatic interactions, and simultaneously trapped photogenerated electrons of TiO 2 to inhibit carrier recombination with an apparent reaction rate constant of 0.0816 min − 1 . Therefore, the use of ultrasonic and microwave co-irradiation in rapidly preparing magnetic composites is simple and viable.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2026
·
IF 3.6
Yanhe Wang,Jiao Xu,Huanlin Zhang,Miao Liu,Zhi Li
High-performance HPSA/ATiO 2 composite aerogels are successfully fabricated. • HPSA/ATiO 2 aerogels show significantly improved flame retardancy and thermal stability. • HPSA/ATiO 2 aerogels exhibit low thermal conductivity, low density, and strong hydrophobicity. The coexistence of long-term low temperature and strong ultraviolet (UV) radiation in cold and high-altitude regions put forward stringent requirements for the thermal insulation and durability of building envelopes. However, conventional thermal insulation materials often struggle to simultaneously achieve low thermal conductivity and stable long-term performance. Therefore, it is critical to develop high-performance thermal insulation materials to improve indoor thermal comfort and reduce building energy consumption. In this work, surface modified titanium dioxide (ATiO 2 ) was incorporated to enhance the UV resistance of hydrophobic silica aerogel (HSA), and then used hypophosphorous acid as the acid catalyst to prepare flame retardant HSA composite aerogels (HPSA/ATiO 2 ). The aerogel exhibited outstanding UV resistance and flame retardancy while maintaining favorable comprehensive properties. For instance, HPSA/ATiO 2 – 0.50 containing 0.5 g ATiO 2 has low density (0.1594 g/cm 3 ), low thermal conductivity (24.9 mW·m –1 ·K –1 ), high specific surface area (654.3 m 2 /g), and high water contact angle (131.2°). Compared with the pristine sample, its total heat release and gross calorific value decreased by 44.7% and 26.39%, respectively. Moreover, the thermal stability of HPSA/ATiO 2 – 0.5 is also significantly improved compared with pure HSA. This study provides a valuable strategy for constructing high-performance HSA and broadens its potential applications in cold and high-altitude environments.
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高影响因子
MOLECULES
·
2026
·Vol. 31
·期 13
·2304
·
IF 5.1
Haopeng Cui,Zhiying Li,Siyu Huang,Tianyi Zhang,Xiaodong Zhang,Zhongxiao Zhang,Jianqiu Lei,Ning Liu
Photocatalytic CO2reduction into CH4is a promising route for solar fuel production, but its efficiency is still limited by poor charge separation, insufficient CO2activation, and sluggish multi-electron transfer kinetics. Herein, Cu-modified TiO2(Cu/TiO2) was prepared by calcining a Cu-modified defective MIL-125(Ti) precursor, denoted as Cu-MIL-125, through a temperature-controlled calcination strategy. The effects of calcination temperature on the structural evolution, surface chemical states, interfacial charge transport, and CO2photoreduction performance were examined. These results indicated that the Cu/TiO2was successfully prepared, while the crystallinity, porous structure, and interfacial electronic properties of Cu/TiO2were strongly dependent on the calcination temperature. Among the obtained samples, the Cu/TiO2sample obtained by calcining Cu-MIL-125 at 450 °C (450 Cu/TiO2) exhibited the highest CH4formation rate, reaching 15.90 μmol g−1h−1, corresponding to an approximately 9.8-fold enhancement over TiO2calcined from defective MIL-125(Ti) at 450 °C, together with a high CH4selectivity of 93.05%. Control experiments and13CO2isotope-labeling tests confirmed that the detected carbon-containing products were generated from CO2under photocatalytic conditions. In situ diffuse reflectance infrared Fourier transform spectroscopy measurements further revealed the formation of carbonate, bicarbonate and hydrogenated carbon-containing intermediates during the reaction. This work offers a practical route for constructing metal–organic framework-derived Cu/TiO2photocatalysts for selective CH4production from CO2.
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高影响因子
Nanoscale
·
2026
·
IF 5.2
Jialun Cao,Bo Fang,Mingwei Wang,Jiayi Shen,Cheng-Lin Liu,Qiangbing Hao,Kejing Li,Xuhong Guo,Li Li
Titanium dioxide (TiO2) has been extensively studied as an inorganic photocatalyst for antibacterial applications. Its activity depends strongly on structural features, particularly particle size and defect state, yet these are challenging to control reproducibly under mild conditions using conventional sol-gel or hydrothermal methods. This difficulty possibly arises from the hydrolysis-condensation process, which is highly sensitive to local composition and mixing and readily trigger aggregation. Herein, we report a flash nanoprecipitation (FNP) approach to fabricate anatase TiO2 with a tunable hydrodynamic diameter of 190-850 nm and a higher defect density than a conventional product (Ti3+ /Ti: FNP 34.9% vs conventional 23.5%). Notably, even at a comparable size (~400 nm), FNP-TiO2 retains a higher Ti 3+ /Ti of 31.0%, suggesting a process contribution beyond the pure size effect. Meanwhile, the defect-enriched TiO 2 shows a band-gap narrowing (FNP: 3.22 eV vs conventional: 3.32 eV) together with improved charge separation and, more importantly, the FNP-TiO2 achieve an inactivation rate of 100% against both S. aureus and E. coli under UV irradiation, higher than conventional TiO2 and commercial P25. This work provides a simple, mild and easy-to-operate strategy that is compatible with continuous operation for the practical preparation of inorganic photocatalysts for disinfection.
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高影响因子
Polymers
·
2026
·Vol. 18
·期 12
·1492
·
IF 5.8
Shuyi Wang,Weiping Yao,Xia Lin,Yamin Xu,Kemei Pei,Yuhai Lu
Driven by the growing demand for functional textiles featuring excellent waterproofness, moisture permeability and mechanical robustness in outdoor sportswear, medical protection and technical apparel, traditional pongee—despite its desirable softness, high wrinkle resistance and good stability as an ideal substrate fabric—is severely restricted in further application by its intrinsically poor hydrostatic pressure resistance in extremely wet environments. Accordingly, we developed a modified waterborne polyurethane (WPU) coating for pongee substrates to fabricate functional textiles that maintain high hydrostatic pressure resistance while possessing good mechanical properties and increased UV absorption. In this study, by using the sol–gel method, an amorphous silicon dioxide (SiO2) coating layer was constructed on the surface of titanium dioxide (TiO2) particles, forming silica-modified titania particles (SiO2/TiO2). These SiO2-modified particles were subsequently physically blended with an anionic waterborne polyurethane system that had been previously modified with a polyester-type modifier A to enhance its hydrostatic pressure resistance. The resulting composite coating was designed to combine the high hydrostatic pressure resistance inherited from the modified WPU matrix, the mechanical reinforcement and increased UV absorption contributed by SiO2/TiO2, and satisfactory water repellency on fabric substrates. The results indicate that the incorporation of an appropriate amount of modifier A into the prepolymer system significantly enhances hydrostatic pressure resistance while maintaining high elongation at break. At a SiO2/TiO2loading of 0.2 wt%, the composite film exhibits optimal comprehensive performance, characterized by superior mechanical properties, low water absorption, and static water contact angles exceeding 100° for coated fabrics. SiO2/TiO2composite WPU coatings substantially improve hydrostatic pressure resistance across various fabrics, with 380T polyester taffeta demonstrating the best performance. This resistance remains remarkably stable after standard washing, indicating excellent wash fastness and practical applicability.
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高影响因子
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