Biomaterials Science
·
2018
·Vol. 6
·期 9
·2460-2471
·
IF 5.831
Xiuhua Wang,Lei Tan,Xiangmei Liu,Zhenduo Cui,Xianjin Yang,Kelvin W. K. Yeung,Paul K. Chu,Shuilin Wu
Near infrared (NIR) light induced photodynamic antibacterial therapy (PDAT) is a promising antibacterial technique in rapid in situ disinfection of bacterially infected artificial implants due to its penetration ability into tissues. However, the lower oxygen content in vivo may restrict the yields of reactive oxygen species (ROS), thus reducing the antibacterial efficacy of PADT significantly. Herein, liposome encapsulated photosensitizers (PS), IR780 and perfluorohexane (PFH), have been constructed on the surface of Ti implants via a covalent linkage to overcome this issue. Thanks to the high oxygen capacity of PFH, more ROS can be generated during NIR irradiation regardless of the low content of oxygen in vivo. As a result, in vitro tests demonstrated that 15 minutes of 808 nm near-infrared irradiation could achieve a high antibacterial efficacy of 99.62% and 99.63% on the implant surface against Escherichia coli and Staphylococcus aureus, respectively. By contrast, the PDAT system without PFH modification shows a lower antibacterial efficacy (only 66.54% and 48.04%, respectively). In addition, this enhanced PDAT system also possesses great biocompatibility based on the in vitro and in vivo subcutaneous assays. This surface system makes it possible for rapid bacteria-killing in artificial implants that have been implanted in vivo under local conditions with lower oxygen content.
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DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Chengzhi Zhou,Yanping Wang,Jie Chen,Lei Xu,Haiming Huang,Junfeng Niu
Electrochemical degradation of antiviral drug abacavir was investigated by using a penetration flux porous Ti/SnO 2 –Sb anode prepared by sol-gel method. The effects of applied current density, initial pH, and inorganic anions on the degradation kinetics were systematically studied. Degradation efficiency more than 97% was performed in only 10 min at a current density of 0.2 mA cm −2 . The corresponding degradation rate constant and the lowest electrical energy per order were calculated to be 0.36 min −1 and 6.5 mWh L −1 , respectively. Extending the reaction duration to 5 h, 53.3% of TOC removal was observed. The results indicated that effective degradation of abacavir appeared in the penetration flux porous Ti/SnO 2 –Sb anode with a very low energy consumption. Furthermore, the electrochemical intermediate products and the reaction site during abacavir degradation were detected and recognized. The quantitative structure-activity relationship model revealed that the potential risks of abacavir to the aquatic organism, such as fish, greatly decreased after flowing through the penetration flux porous Ti/SnO 2 –Sb anode.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Yue Wei,Gang Li,Jiaxu Liu,Yanhui Yi,Hongchen Guo
The sluggish interfacial mass transfer usually hinders the achievement of high-efficiency catalytic transformation of biomass, especially for solvent-free immiscible reagent systems. Herein, amphiphilic hybrid Ti-containing catalysts in situ incorporated with organic groups (Cn-Ti-HMS) were developed for boosting biphasic solvent-free epoxidation of methyl oleate (MO) with H 2 O 2 . Benefiting from the mutual effect between organic/inorganic precursors, the resulting low-defect catalysts exhibit well-mediated surface hydrophilic/hydrophobic balance and porosity by incorporating alkyl groups. Such mediation effect exhibits two superiorities: i) accelerated adsorption of reactants by amphiphilicity; ii) boosted substrate or product diffusion by porosity property. As such, remarkably promoted catalytic properties were achieved when compared with conventional Ti-HMS. Typically, methyl-functionalized C1–Ti-HMS-50 displays the optimal catalytic performance with a 95% conversion of MO. Further mechanism study recognizes the dominant role of surface wettability and Si–OH defects content in influencing MO conversion and epoxidized MO selectivity.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Kang Tang,Weilong Hou,Xiaoshu Wang,Wen Xu,Xinqing Lu,Rui Ma,Yanghe Fu,Weidong Zhu
The titanosilicate zeolite catalyzed epoxidation of propylene with hydrogen peroxide (H 2 O 2 , HP) to propylene oxide (PO), the so-called HPPO, is more eco-efficient, compared to the chlorohydrin process and the epoxidation using organic hydroperoxides. However, the zeolite catalysts used in the HPPO process are easily deactivated, because the main byproduct propylene glycol (PG) and other heavy byproducts with high boiling points, derived from the solvolysis of PO, are deposited inside the zeolite micropores. In the present work, trimethylsilylated Ti-MWW zeolites, named Si–Ti-MWW, were developed for the HPPO process. In combination with the results from extensive characterizations for the prepared zeolites, it is found that the trimethylsilylation merely occurs on the external surface of Ti-MWW crystals and can significantly enhance the hydrophobicity , but not alter the coordination states of the Ti species and textural properties of the zeolites. The catalytic properties of Ti-MWW and Si–Ti-MWW were compared in propylene epoxidation. The results show that the solvolysis of PO to the byproducts can be effectively inhibited over the hydrophobic zeolite surface, making Si–Ti-MWW exhibit a much higher selectivity for PO and a much better stability and reusability than the parent Ti-MWW in the HPPO process. The current study, therefore, provides a new approach to develop efficient catalysts for the HPPO process.
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高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 32
·10558-10563
·
IF 4.029
Dejian Yan,Jikai Liu,Zhichao Shang,He'an Luo
Ti-doped α-Fe2O3 nanorods (NRs) with carbon layer coating were fabricated for photoelectrochemical (PEC) water oxidation. The α-Fe2O3 NRs were grown on the surface of a Ti foil substrate by hydrothermal synthesis. Ti4+ was diffused from the Ti substrate and doped into the α-Fe2O3 NRs by sintering at 800 °C. The presence of Fe2+ in the α-Fe2O3 lattice was achieved by annealing the NRs in a lack of oxygen atmosphere, e.g. in argon. The co-existence of Ti4+ and Fe2+ results in significant enhancement of the PEC performance compared with the hematite NRs obtained by annealing in air, showing the absence of Fe2+. The carbon layer coating was conducted by the carbonization of glucose. Impressively, the coated carbon layer can not only facilitate the charge transfer of the photogenerated carriers but also effectively restrain the structural aggregation of the NRs upon high temperature sintering. The carbon layer coated NRs exhibited 1.2 times higher photocurrent density than the uncoated NRs due to the reduced charge recombination and well-distinct NR structures.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 16
·1-9
·
IF 2.8
Xie Yanjiang,Hao Hua,Cao Minghe,Yao Zhonghua,Liu Hanxing
In this study, we proposed a novel method of adding large amount of excessive Ti in Bi 0.5 Na 0.5 TiO 3 -based thin film to improve its energy storage density. Ti-excess 0.94Bi 0.5 Na 0.5 Ti x O 3 -0.06BaTi x O 3 (BNBT x , x = 1.00, 1.05, 1.10, 1.15) thin films were successfully prepared by sol–gel method. It was found that the phase structure of the thin films kept unchanged with the increase of Ti content, and substantial improvements in microstructure and breakdown strength could be obtained by the addition of an excess of Ti in BNBT x thin films, as well as reduced leakage. As a result, improved energy storage density of 34 J/cm 3 and energy storage efficiency of 48% were achieved simultaneously in BNBT 1.15 thin film at a medium electric field of 2400 kV/cm. Furthermore, Ti-excess thin films showed high-dielectric constant with good temperature stability from 25 to 200 °C. These results demonstrate that Ti-excess BNBT x thin film is a potential system for energy storage materials.
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高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Yinxuan Liang,Guohuang Kang,Yanru Liu,Jinhui Zhang,Yao Lv,Kangning Cai,Yilei Zhang,Feiyu Kang,Yidan Cao
Lithium-rich manganese-based cathode materials, as promising candidates for next-generation high-energy-density lithium-ion batteries due to their high specific capacity (>250 mAh g −1 ) and cost-effectiveness, are limited by severe capacity decay and voltage fade driven by irreversible structural transitions and oxygen release during cycling. Here, we report a Ti/Si dual-element modification strategy for cobalt-free Li 1.2 Ni 0.2 Mn 0.6 O 2 (LNMO) cathodes. The Ti/Si co-modified TS-LNMO cathode demonstrates superior structural stability and electrochemical performance. Bulk Ti 4+ doping stabilizes the oxygen framework via robust Ti–O bonds and enhances the lattice oxygen redox reversibility, while an in situ formed Li 2 SiO 3 layer suppresses interfacial side reactions, enhances lithium-ion diffusion, and prevents HF-induced erosion. As a result, the TS-LNMO cathode achieves 90% capacity retention after 200 cycles at 0.5 C and maintains ∼80% capacity in full cells cycled to 4.8 V. Additionally, the TS-LNMO cathode exhibits impressive rate performance even at a high rate of 5 C. This work offers an effective strategy for advancing cobalt-free, high-performance lithium-rich cathodes for sustainable energy applications.
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产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Zhengyang Li,Yuting Chen,Zhiyuan Guo,Tong Wang,Qi Fan,Yuhang Zhuang,Chenying Li,Mei Yang,Teng Xu,Yanchen Liu,Zhiyuan Li,Qin Sun,Xiaohui Zhu,Hui Xia
Manganese-based oxide cathodes for sodium-ion batteries face irreversible degradation from Mn 3+ Jahn–Teller distortion and Mn 2+ dissolution, compounded by cyclic strain during (de)sodiation. To address this, a P2-K 0.7 Mn 0.8 Ni 0.1 Ti 0.1 O 2 (KMNT) cathode via dual-regulation is developed: K + pillars expand alkali - metal layers enabling fast Na⁺ diffusion, while Ni/Ti co-doping compresses transition-metal layers to suppress Mn migration and Jahn–Teller effect. Besides, the K + pillars in discharged KMNT enhance Mn─O interactions via electrostatic effects, elevating Mn redox potentials and enabling a high average discharge voltage of ≈2.6 V (vs. Na + /Na). Even at a low potential cut-off of 1.5 V, the KMNT cathode demonstrates a reversible specific capacity of 124 mAh g −1 at 1 C with 98% capacity retention after 200 cycles and retains 83% after 900 cycles at a large current density of 10 C, significantly outperforming conventional Mn-based cathodes. Electrochemical and operando tests confirm the dynamic K + /Na + exchange mechanism and absence of Mn 2+ formation, establishing a new paradigm for stable Mn-rich cathodes.
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Cuiting Yang,Bowen Wu,Zewei Liu,Guang Miao,Qibin Xia,Zhong Li,Michael J. Janik,Guoqing Li,Jing Xiao
Ultra-deep desulfurization of transformer oil is of great demand among power industry. In this work, the effective and deep removal of various types of organosulfurs, including mercaptan, sulfide and disulfide via catalytic adsorptive desulfurization (CADS) using bifunctional Ti-based adsorbent is reported. Compared to adsorptive desulfurization (ADS), dramatically improvement of the organosulfur uptakes were achieved under CADS process. The equilibrium adsorption capacity at 5 μg∙g −1 S reached up to 15.7, 33.4, 11.6 and 11.9 mg∙g −1 for propyl mercaptan( n -PM), dimethyl sulfide(DMS), di- t -butyl disulfide (DTBDS) and dibenzyl disulfide (DBDS), which was 262, 477, 97 and 128 times to that of ADS process, respectively, and was the highest among the reported desulfurization adsorbents. Moreover, it achieved superior breakthrough capacity of 2050, 530 and 210 ml F·(g A) −1 at the breakthrough S concentration of 1 μg∙g −1 of the commercial transformer oil S containing 10, 50 and 150 μg∙g −1 , respectively. The effectiveness of CADS is associated to the transformation of sulfur species to higher polar sulfonic species with the assistance of mild oxidant, which can be readily captured by silanol groups on SiO 2 through H-bonding interaction. The excellent recyclability of the adsorbent can be realized through solvent washing or oxidative air treatment. This work provides an effective and economic approach for the elimination of trace amount of mercaptan, sulfide and disulfide from transformer oil.
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Dongxiu Lu,Ruhui Ma,Yuan Chen,Yuancai Chen
In this study, Ni-doped Ti/SnO 2 -Sb anode (Ti/NATO) was prepared and used for electrocatalytic ozone production and in-situ activated peroxymonosulfate (E-Ti/NATO-PMS) to degrade bisphenol A (BPA). SEM, XRD and XPS results indicated that Ni doping could influence the transformations of Sb 5+ and Sb 3+ ions, which decreased the agglomeration of crystallites and increased the O ads and oxygen vacancy (O v ) concentrations. Ti/NATO 1.0 anodes significantly improved the ozone production via outcompeting of the adsorbed O 2ads over water, and inhibiting the desorption of O 2ads , to obtain the highest O 3 concentration with low onset potential and high oxygen evolution potential. E-Ti/NATO 1.0 -PMS system obtained over 92% BPA degradation within 60 min at 10 mA cm −2 and pH ranging from 4 to 10. Radical scavenging experiments revealed that O 3 in situ generated could directly electro-activate PMS into •O 2 − and 1 O 2 . The E-Ti/NATO 1.0 -PMS process could detoxify the BPA through chain scission, rearrangement and ring opening processes, and exhibited great potentials for application.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Shiyi Zhang,Mengdi Cheng,Yangxi Yan,Zhimin Li,Pangpang Wang,Ri-ichi Murakami,Dongyan Zhang
High-performance piezoelectric materials , whose displacement is sensitive to an external field and vice versa, are constantly required in electromechanical applications. Here, we introduce Nd 3+ ions into 0.49Pb(Nb 2/3 Ni 1/3 )O 3 -0.51Pb(Hf 0.3 Ti 0.7 )O 3 (PNN-PHT) ceramics via the solid-state method. By constructing a ferroelectric system in the morphotropic phase boundary region and exploiting the synergistic effect of polar nanoregions and an enhanced local structural heterogeneity, excellent piezoelectricity and dielectric properties are obtained. The optimized piezoelectric coefficient d 33 , dielectric constant ε 33 , electromechanical coupling factor k p , and dielectric loss tanδ are 1125 pC/N, 8667, 0.66 %, and 1.94 %, respectively. The Vogel-Fulcher law and relaxation analysis were adopted to understand the origin of the high piezoelectricity. The Rayleigh analysis method was used to study the intrinsic and extrinsic contributions to the piezoelectricity of the Nd-doped PNN-PHT ceramics, the extrinsic contribution was found to be up to 19 % in the optimal region (PNN-PHT + 0.4 at. % Nd 2 O 3 ). Moreover, according to in-situ ferroelectric measurements and fatigue measurements, the PNN-PHT + 0.4 at. % Nd 2 O 3 ceramic exhibits excellent fatigue resistance and stable piezoelectric behavior at 60 ℃ . This work provides an approach to realize high-performance piezoelectric ceramics with good electromechanical stability under external condition, which is expected to expand the range of application of piezoelectric materials, e.g., for transducers.
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高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Shunqin Luo,Chao Tang,Zhaohui Huang,Chen Liu,Jiawei Chen,Minghao Fang
In this study, bismuth oxyiodide/titanium dioxide (BiOI/TiO 2 ) heterostructures with different molar ratios of Bi and Ti were synthesized by electrospinning and hydrothermal methods . The samples thus synthesized were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, X-ray photoelectron spectroscopy, and ultraviolet–visible diffuse reflectance spectroscopy . The results confirmed the presence of the BiOI/TiO 2 heterojunction with Bi/Ti molar ratios of 0.20–1 by electrospinning and hydrothermal methods . Photocatalytic activity was also evaluated by the degradation of methylene blue (MB) under visible-light irradiation. The 80% BiOI/TiO 2 heterostructure exhibited the best photocatalytic activity for the degradation of MB under visible-light irradiation.
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高影响因子
危险品化学品经营许可证（带存储）