APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Bingbing Cui,Guodong Fu
Given that heterojunction engineering is an effective method for improving the separation efficiency of photoexcited electrons in WO 3 -based photochromic systems, a series of solid-state photochromic Zr/Ti-MOF@WO 3 heterojunctions prepared via a facile hydrothermal strategy, where Zr/Ti-MOF with photosensitivity and chemical stability was selected as template to load WO 3 . Zr/Ti-MOF@WO 3 heterojunctions were verified as nanoparticles filled with thin layer structure and WO 3 was diffused into the Zr/Ti-MOF planar. The appropriate conductive band energies facilitate the transport of photostimulated electrons from Zr/Ti-MOF to WO 3 , resulting in a fast photresponse in color changes (it only takes 1 s). In addition, a carrier for information storage and data dynamic encryption was developed on the basis of the photochromic Zr/Ti-MOF@WO 3 heterojunctions. This work presents a promising way to improve the electron/holes separation efficiency by constructing unique heterojunctions and further explore novel WO 3 -based photochromic systems and broaden their applications in rewritable media and data security.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Chen Su,Mingyu Li,Shuai Zhang,Weiqing Liu,Yuanzhang Wang,Peipei Li,Huanran Feng,Ming-Shui Yao,Weiwei Wu,Lu Zhang
The development of multifunctional hydrogels with enhanced mechanical, electrical, and electromagnetic properties has become a key focus in various advanced applications, including wearable electronics, strain sensors, and electromagnetic interference (EMI) shielding. However, challenges remain in achieving a balanced integration of stretchability, conductivity, and broadband microwave absorption within a single material. This study addresses these limitations by introducing a novel dual-crosslinked Ti₃C₂Tx MXene-based hydrogel designed for wearable sensor and EMI shielding applications. The PVA/MXene/PSS hydrogel is synthesized via a freeze-thaw crosslinking method to create a three-dimensional (3D) conductive network. Water retention and conductivity are enhanced through the synergistic effect between sodium chloride (NaCl) and formic acid (HCOOH), addressing key challenges such as water evaporation and MXene dispersion. The resulting hydrogel exhibits impressive mechanical stretchability (369% tensile strain), long-term stability (6000 s under 25% strain), and ultra-high strain sensitivity with a minimum detectable strain of 1%. It demonstrates gauge factors of 0.78 and 0.51 in the transverse and longitudinal directions for strains below 50%, respectively, and 0.28 and 0.37 for strains between 50% and 100%. Moreover, it demonstrates exceptional broadband microwave absorption with a peak reflection loss of −55.5 dB at 10.73 GHz, with an effective absorption bandwidth of 6.34 GHz. The combination of excellent mechanical, electrical, and microwave properties, along with superior stretchability and durability, makes this hydrogel a promising candidate for next-generation wearable sensors, flexible electronics, and electromagnetic interference shielding.
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Advanced Healthcare Materials
·
2025
·
IF 9.6
Minggang Yang,Yufan Zhang,Zhenhao Hou,Jianbo Wu,Fuwei Liu,Jun Wu,Kelvin W.K. Yeung,Wenhao Qian,Xuanyong Liu,Liang Kong,Yunpeng Li,Jiajun Qiu,Guocheng Wang
Antibiotic therapy is a key strategy for treating infections associated with orthopedic implants, yet its limited effectiveness and potential to disrupt bone healing highlight the need for innovative approaches. Herein, a TiO 2 -Graphene (TiO 2 -G) metastructure is developed on Ti implant surface using a hydrothermal method coupled with plasma-enhanced chemical vapor deposition (PECVD), showing strong near-infrared light (NIR) absorption. The antibiotic doxycycline (DOX) is successfully loaded onto TiO 2 -G and exhibited enhanced NIR release. The promising antibacterial efficacy is proven by both in vitro and in vivo tests with NIR irradiation for 5 min, which is ascribed to the synergistic photocatalytic activity of TiO 2 -G and NIR-responsive release of DOX. Interestingly, after 5 min of NIR irradiation, the TiO 2 -G metasurface neutralized the immediate negative effects of photodynamics and even upregulated the expression of osteogenic genes (osteocalcin (OPN), osteopontin (BSP), and bone sialoprotein (OCN)), with particularly enhanced effects observed on day 14. Moreover, the sustained release function of TiO 2 -G significantly mitigated the cytotoxicity of free antibiotics with antibacterial capabilities comparable to those of TiO 2 -G/DOX under NIR irradiation for 5 min. Consequently, the in vivo studies proved that the TiO 2 -G metastructure enhanced the osteointegration of the implant even in the absence of infection when loaded with DOX.
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PubMed
高影响因子
ACS Catalysis
·
2017
·
IF 10.614
Meng Liu,Song Shi,Li Zhao,Min Wang,Guozhi Zhu,Xi Zheng,Jin Gao,Jie Xu
A core–shell catalyst (Co–SiO2@Ti–Si) with cobalt-based SiO2 nanocomposite (Co–SiO2) as the core and Ti-doped mesoporous silica as the shell was designed to catalyze a one-pot reaction of sulfide oxidation with in situ generated hydroperoxide. The catalyst was characterized by SEM, TEM, UV–vis spectroscopy, and XPS, among other methods. Compared to Co–SiO2 and the physical mixture of the two components (Co–SiO2 + Ti–Si), the core–shell catalyst significantly enhanced the reaction rate of the sulfide oxidation. The utilization efficiency of the hydroperoxide was an important factor responsible for the differences in the reaction rates. A further mechanism study showed that the improvement of the efficiency was due to the existence of a coordination pathway. The core–shell structure of a bifunctional catalyst represents a strategy for improving the utilization efficiency of hydroperoxide.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yu Hu,Xin Li,Xiaolin Zhang,Weiming Zhang,Bingcai Pan,Ming Hua
The salt ions (typically > 1000 mg/L) present in copper plating wastewater limit the application of ion exchange in the deep treatment of copper complexes (such as copper-pyrophosphate (Cu-PPi)). Metal nanoparticle immobilization is an effective method, and bimetallic nanoparticles have more potential than monometallic ones. In this study, bimetallic nanocomposite Ti-Zr-201 was successfully synthesized by confining Ti-Zr oxide nanoparticles in the pores of anion exchange polymer (D201). The obtained new adsorbent Ti-Zr-201 with bimetallic doped structure had more active sites (7.22 mmol/g), higher hydroxyl content (3.51 × 10 22 OH/ nm 2 ) and larger specific surface area (31.65 m 2 /g) than monometallic nanocomposite adsorbents (Zr-201 and Ti-201). The results showed that Ti-Zr-201 has better Cu-PPi adsorption capacity (24.82 mg Cu/g) than Zr-201 (21.48 mg Cu/g) and Ti-201 (21.71 mg Cu/g) in the high salt water (2000 mg/L NO 3 – ). Further mechanistic studies revealed that Cu-PPi removal as a whole was mainly realized via ternary complexation (Ti/Zr-O-Cu-PPi of Type-A, Ti/Zr-O-PPi-Cu of Type-B) and quaternary complexation (Ti/Zr-O-PPi-Cu-PPi of Type-B) both formed during the adsorption. The saturated Ti-Zr-201 can be regenerated more than 90% rapidly and had good stability. Moreover, the novel adsorbent also had a excellent removal effect on several other phosphorous copper complexes (tripolyphosphate, methyl dihydrogen phosphate, etc.). Therefore, the nanocomposite Ti-Zr-201 exhibited promising application on the deep removal of complex-state Cu with phosphorus ligands from high salty wastewater.
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PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Hui Liu,Yuewen Huang,Yaodong Zhang,Zicheng Xie,Binzhi Wang,Bin Wang
UV curing technology has numerous advantages such as a fast curing speed, environmental friendliness, energy conservation, and thus it is widely used in industrial production and out daily life. Free-radical polymerization is the primary mechanism for UV curing technology. However, free-radical polymerization is susceptible to oxygen inhibition, which leads to incomplete curing when this approach is employed in the air. This paper describes a new silicone acrylate prepolymer , four double bonds and a tertiary amine group at each end of the prepolymers can effectively solve the oxygen inhibition. We synthesized an alkoxymethacryloxy titanium monomer (Ti-MA). This monomer was mixed with the prepolymer and UV cured, which resulted in improved coating properties. The results showed that the double bond conversion of the prepolymer reached 90.66 ± 0.5 % at 20 s, and the residual adhesion rate also exceeded 90 %. The hardness of the coating could reach pencil hardness level 4H with the addition of Ti-MA, and the water contact angle reached 104.5 ± 0.2°, as well as excellent anti-smudge and anti-fingerprint properties. This study provides a new method to solve the oxygen inhibition problem, which has a broad application prospect in the field of coatings.
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CORROSION SCIENCE
·
2024
·
IF 7.4
Xin-Ran Li,Xian-Ze Meng,Qiu-Yu Huang,Jian Wang,Yu-Yua Xiao,Lian-Kui Wu,Fa-He Cao
Metal corrosion exhibits coupled multi-reaction features, making it challenging to quantitatively study the dissolution reaction with variable-valent cations, particularly in valence quantification. This work develops a novel scanning electrochemical microscopy mode and applies it to Ti dissolution study in acidic fluorides. This mode identifies the potential-dependent corrosion reactions and quantifies the valence evolution of Ti from HER to transpassive regions. Results provide direct electrochemical evidence for soluble Ti( z ≤3), for the first time, and revise the reported dissolution equation. The proposed mode overcomes the drawbacks of macro-electrochemical analysis based on coupling information and provides an effective quantitation method for anodic reactions .
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高影响因子
Coatings
·
2025
·Vol. 15
·期 8
·948
·
IF 2.8
Liting Mu,Yiqi Lian,Shiyu Zheng,Shuo Chang,Ximeng Li,Changhai Sun,Hongbin Qiu
Titanium and its alloys are widely used in orthopedics because of their excellent mechanical properties and biocompatibility; however, their bioinert surface results in sluggish osseointegration and renders implants susceptible to bacterial infection. This study innovatively constructed a “CHP-Ti-MAO” composite coating, which aims to simultaneously improve early osseointegration and antibacterial performance. CHP micron coatings coated with hydroxyapatite (HA) and curcumin (Cur) at different PLGA concentrations (50%, 100%, and 150%) were deposited on the basis of calcium–phosphorus ceramic coatings prepared by micro-arc oxidation (MAO) following the emulsification-solvent volatilization method. It was found that increasing the concentration of PLGA can increase the particle size of the coating, enhance the hydrophilicity, and significantly improve the sustained release performance of the drug. Among them, the 100% PLGA concentration group performed the best: the drug-release half-life reached 75 h, and the corrosion current density was the lowest (9.5 × 10−9A/cm2), showing the best corrosion resistance. This group of coatings has a strong and long-term antibacterial effect on Escherichia coli, with an antibacterial rate of more than 95% at 24 h and more than 99% by day 17. The hemolysis rate of all coatings was lower than 5%, indicating good biocompatibility. This study confirmed that 100% CHP-Ti-MAO composite coating successfully solved the limitations of excessive pore size and insufficient antibacterial persistence of an MAO layer and also had excellent slow-release, corrosion resistance, and high-efficiency antibacterial capabilities, which provided an important basis for the development of a new generation of multifunctional titanium-based implants.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xiufen Yang,Runzhi Han,LiWei Shi,YiXin Li,Changyong Lan,Leiming Chen,Chuanfu Huang
To address the persistent challenges of wide band gap (2.13 eV), high carrier recombination rates, and poor cycling stability in bismuth ferrite (BiFeO 3 BFO)-based photocatalysts, this study introduces an unprecedented La³⁺/Ti⁴⁺ dual-site doping strategy. La/Ti co-doped BFO nanoparticles (n% BLFTO) were synthesized using a sol-gel method. The synergistic effects of La³⁺-induced gradient oxygen vacancies (increased by 270%) and Ti³⁺/Ti⁴⁺ redox couples led to a significant band gap narrowing to 1.79 eV, extending visible light absorption to 450-700 nm. Remarkably, the optimized 30% BLFTO sample achieved a 98.9% degradation efficiency of Rhodamine B (Rh B) within 120 minutes-7.17% higher than pure BFO and maintained 95.92% efficiency after 12 cycles (2.98% decay), demonstrating exceptional stability rarely reported in prior works. In-situ X-ray Photoelectron Spectroscopy and Photoluminescence Spectroscopy analyses revealed that dual-doping synergistically modulates carrier dynamics via Fe²⁺/Fe³⁺ mixed valency and abundant oxygen vacancies, thereby prolonging carrier lifetimes and enhancing photocatalytic activity. This work pioneers a dual-doping framework that simultaneously enables highly efficient visible-light-driven degradation of Rh B and exceptional cycling stability, offering new insights for the design of robust photocatalysts for environmental remediation and renewable energy applications.
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ACS Nano
·
2025
·
IF 16
Xinqiang Hu,Maohua Chen,Huocheng Yang,Hao Wei,Bikun Zhou,Menghuan Li,Zhong Luo,Kaiyong Cai,Yan Hu
Ti-based implants are a mainstream treatment modality for bone fracture treatment, but their osseointegration is severely hampered by osteoporosis-associated biomineralization disorder. This study reports a multifunctional hydrogel-biovesicle composite coating capable of enhancing interfacial biomineralization in a cascade manner to facilitate Ti-based implant osteointegration. For this purpose, we first prepared azido-tagged osteoblast membrane vesicles through glycoengineering of live osteoblasts for loading calcitriol (VD3), which were then facilely conjugated to hydrogels composed of phosphorylated gelatin (P-gel) and dibenzocyclooctyne-modified carboxymethyl chitosan through click reaction. Notably, liquid nitrogen-assisted directional freezing fabrication technology was applied during hydrogel preparation to mimic the extracellular matrix (ECM) pattern in healthy osteons for enhancing Ca2+ influx and osteogenic differentiation of adherent osteoblasts, while the biovesicle-mediated in situ VD3 delivery could further boost cellular Ca/P metabolism and mineral precursor excretion to accelerate ECM mineralization. These functions could act in a cooperative manner to promote new bone formation at the bone-implant interface to accelerate Ti-based implant osteointegration, presenting a promising approach for osteoporotic bone fracture repair in the clinic.
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ENERGY & FUELS
·
2025
·
IF 5.3
Mingqiang Chen,Yupei Li,Yishuang Wang,Defang Liang,Chang Li,Haosheng Xin,Jun Wang
Catalytic depolymerization of lignin (CDL) is a prospective technology for the efficient utilization of biomass. In this paper, novel B–Ti-modified diatomite-supported nickel phosphide catalysts (xNiP/BTD) were prepared to depolymerize lignin in a unique formic acid-assisted aqueous-phase glycerol medium. Under optimal conditions, 4NiP/BTD exhibited 100% lignin conversion and 95.4% lignin oil (LO) yield, in which the yield of petroleum ether (PE)-soluble product reached 20.6%. Based on the characterization results, the superior performance of 4NiP/BTD for CDL was attributed to the collaborative effect of metallic Ni0 centers and acidic sites within Ni3P species. Among these, metallic Ni0 sites activated formic acid and aqueous-phase glycerol to generate active hydrogen (denoted as H*); subsequently, lignin was dominantly converted into phenol and alkyl guaiacol under the comprehensive function of H*, Lewis (Niδ+ species), and Bronsted acid sites (P–OH groups). Additionally, a potential reaction pathway for CDL with 4NiP/BTD as the catalyst was suggested. This study established a feasible approach for the efficient conversion of lignin using crude glycerol and green clay resources.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jiale Dou,Zhuwei Yang,Linsen Li,Xinyi Hu,Li Lin,Lixia Ling,Zhao Jiang
With the global energy structure transitioning towards decarbonization, hydrogen energy has emerged as a critical energy carrier due to its merits of zero carbon emissions and high energy density. As a candidate material for liquid organic hydrogen carrier (LOHC), it is necessary to develop efficient dehydrogenation catalysts of dodecahydro-N-ethylcarbazole (12H-NECZ) to overcome the challenges of low kinetics and selectivity. In this work, by the defect engineering strategy, a series of Pt-TiO 2 catalysts are synthesized via thermal reduction using titanium (Ti) as a reducing agent. The effects of various TiO 2 :Ti molar ratios (5:1 to 8:1), annealing temperatures (550–850 °C), and Pt loadings on the structural and catalytic properties are systematically investigated. It is indicated that the 2.5Pt-7:1–650 catalyst exhibits optimal dehydrogenation efficiency, achieving 100 % conversion, 99.03 % selectivity of NECZ, and hydrogen release capacity of 5.77 wt% under 453 K and 101.325 kPa for 7 h. Various structural characterizations from XRD, H 2 -TPR, ESR, and XPS analysis reveal that the oxygen vacancies and Ti 3+ species are generated induced by the metallic Ti reduction. The interaction between Pt and TiO 2 facilitates the electron transfer from TiO 2 to Pt, optimizes the electronic state of Pt and promotes the C-H bond cleavage of benzene ring in adsorbed 12-NECZ molecules. Furthermore, the kinetic analysis for a three-step reaction pathway confirms the dehydrogenation of 4H-NECZ to NECZ is the rate-limiting step. The stability measurements suggest that 2.5Pt-7:1–650 maintains the hydrogen release amount of 5.64 wt% after 20 cycles at 453 K, demonstrating the potential applications for the NECZ/12-NECZ system. This study provides a novel strategy for designing high-performance LOHC dehydrogenation catalysts through defect engineering.
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