INTERNATIONAL BIODETERIORATION & BIODEGRADATION
·
2021
·
IF 4.32
Xiao Zhou,Min Zhou,Shengjun Ye,Yanbin Xu,Shaoqi Zhou,Qiujie Cai,Guangyan Xie,Lu Huang,Li Zheng,Yuxin Li
The antibacterial activity and mechanism of reduced graphene oxide (rGO)-modified TiO 2 were assessed against Enterobacter hormaechei in this study. The rGO-modified TiO 2 exhibited an enhanced antibacterial activity against E. hormaechei under UV–Visible light irradiation compared with individual TiO 2 or rGO alone. Its effectiveness owed to the synergistic effect of the improved adsorption and the lower recombination of photo-induced electron–hole pairs. The hybrid photocatalyst improved charge separation and chemical binding activity that contributed to accelerated antibacterial process. The flow cytometry results showed that the hybrid photocatalyst reduced the survival ratio of E. hormaechei to about 10% with 90 min under visible light illumination. The XPS spectra and SEM micrographs indicated a direct physical contact and disruptive interaction between the bacteria and the rGO-TiO 2 catalyst, mostly on rGO, resulting in oxidizing a vital cellular structure. EPR measurement revealed that hydroxyl radicals were the dominant active species that can cause the peroxidation of lipids in the outer cell wall and the damage of cell organelles and components inside the bacteria, which is the key mechanism for this antibacterial process. Overall, this study indicated that rGO-modified TiO 2 nanocomposite has great potential as an economical, environmentally friendly and easily available antibacterial material for antibacterial.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 5
·4138-4145
·
IF 1.798
Yu Mei,Meng Yanbing,Zhang Jindan,Liu Jianhua,Li Songmei
Super helical Au/TiO 2 nanocomposites were synthesized using plasmid DNA and incorporated into photoanode of dye-sensitized solar cells (DSSCs). The performance of photoanode films and DSSCs was investigated. Plasmid DNA can not only support as bio scaffold to synthesize Au/TiO 2 nanocomposites, but also act as an effective reducing agent under ultraviolet (UV) irradiation. Compared with TiO 2 -only DSSCs, the light harvesting (LH), corresponding photocurrent and power conversion efficiency (PCE) of DSSCs were enhanced by incorporating of mechanically mixed Au-TiO 2 NPs and Au/TiO 2 nanocomposites. Compared to the TiO 2 -only DSSCs samples (5.12%), the PCE of DSSCs with mechanically mixed Au-TiO 2 nanoparticles (NPs) (6.41%) increased by 25.20%, and DSSCs with Au/TiO 2 nanocomposites (8.17%) increased by 59.57%. The best PCE (8.24%) of DSSCs was obtained with the incorporation of Au/TiO 2 nanocomposites. Two reasons were presented for the best performance of DSSCs with Au/TiO 2 nanocomposites. Firstly, the localized surface plasmon resonance (LSPR) effect of Au NPs enhanced the absorption visible light. Secondly, the super helical structure of Au/TiO 2 nanocomposites provided a path for the transmission of photoelectrons.
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高影响因子
MATERIALS & DESIGN
·
2020
·
IF 6.289
Baoping Zhang,Bo Li,Shuting Gao,Yiting Li,Rui Cao,Jingyang Cheng,Ruiping Li,Errui Wang,Yumeng Guo,Kailiang Zhang,Jun Liang,Bin Liu
To improve the bioactivity and antibacterial properties of implant materials. In this study, the biomedical titanium alloy (Ti-6Al-4V) was covered by yttrium doped titanium dioxide (Y-TiO 2 ) coating via a plasma electrolytic oxidation (PEO) method. By changing the concentration of yttrium acetate in the electrolyte, Y-TiO 2 coating with different mass ratios of yttrium were obtained. The structure morphology and chemical composition of the Y-TiO 2 coating were systematically characterized. The results indicated that the porous and micro-nanostructured Y-TiO 2 coatings were constructed by the pores smaller than 4 μm. Definitely yttrium was not only distributed on the surface but also embedded in the coating. Yttrium mainly existed in form of Y 2 O 3 and Y 3+ state in prepared TiO 2 coating. Element release profiles confirmed that yttrium release slowly from Y-TiO 2 for 32 days. Cell culture tests demonstrated that Y-TiO 2 coating exhibited good biocompatibility on osteoblastic precursor cells and fibroblasts cells with increasing doping concentration of yttrium. Bacteriostasis experiments revealed that Y-TiO 2 coating possess excellent antibacterial property against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ). Thus, the prepared Y-TiO 2 coating with outstanding biocompatibility and antibacterial capacity provided a preferred strategy for the repair and reconstruction of bone tissues in dentistry and orthopedics.
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高影响因子
Nanomaterials
·
2025
·Vol. 16
·期 1
·35
·
IF 4.3
Wenjing Wu,Zichao Yang,Min Zhang,Zhongjie Guan,Jianjun Yang
Photocatalytic reduction of carbon dioxide is a very effective strategy to address the energy crisis and greenhouse effect. TiO2is a widely used semiconductor photocatalyst, which has excellent catalytic activity, excellent chemical stability and low toxicity. Nevertheless, TiO2still has some inherent limitations, such as: wide band gap, high carrier recombination rate, and low adsorption activation ability for carbon dioxide. These drawbacks severely restrict its further application in the photocatalytic reduction of CO2. In this study, cotton-like blue C/TiO2NTs are successfully synthesized through the in situ growth of TiO2nanotubes on the MIL-125(Ti)-derived C/TiO2precursor. The experimental results revealed that the CO production rate of the cotton-like blue C/TiO2NTs was 1.84 times that of C/TiO2and 3.78 times that of TiO2nanotubes. These results clearly demonstrate that the cotton-like blue C/TiO2NTs exhibit a broad spectral response, a large specific surface area, and an abundance of oxygen vacancies. This research provides new insights into the design of titanium dioxide-based photocatalytic materials and opens up a promising avenue for enhancing the performance of titanium dioxide in the photocatalytic reduction of carbon dioxide.
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产品关联
DOI
PubMed
高影响因子
Nanomedicine
·
2019
·
IF 4.717
Chenghao Gao,Hao Cheng,Na Xu,Yong Li,Yangmengfan Chen,Yong Wei,Biao Gao,Jijiang Fu,Kaifu Huo,Wei Xiong
Aim: To create polydopamine (PDA) and Ag nanoparticle-loaded TiO2 nanotubes coating on titanium (Ti) alloy. Materials & methods: TiO2-PDA-Ag coating was fabricated on Ti implants by electrochemical anodization. The in vitro and in vivo bactericidal and antibiofilm activities were tested. Intracellular reactive oxygen species (ROS) and antioxidative capability were measured, and cell proliferation, adhesion and cell morphology were characterized. Results: TiO2-PDA-Ag coating showed satisfactory bactericidal and antibiofilm activities in vitro and in vivo, improved Ag release pattern, evident ROS scavenging properties and enhanced cell adhesion and proliferation. Conclusion: Our study successfully fabricated a PDA and Ag nanoparticle-loaded TiO2 nanotubes coating on Ti alloy. The improved Ag release kinetics and ROS-scavenging properties achieve an optimal balance between antibacterial ability and biocompatibility.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xilin Liao,Ting-Ting Li,Hai-Tao Ren,Zhiyong Mao,Xuefei Zhang,Jia-Horng Lin,Ching-Wen Lou
Herein, a simple and effective visible-light driven photoelectrochemical (PEC) aptasensor was designed using BiFeO 3 @TiO 2 nanocomposites for accurate and rapid detection of microcystin-LR (MC-LR). This composite was obtained by coupling p-type BiFeO 3 nanoparticles with n-type TiO 2 nanosphere to constructed a p-n heterojunction. This p-n heterojunction not only could narrow the band-gap of TiO 2 from 3.14 eV down to 2.14 eV of BiFeO 3 @TiO 2 , resulting in superior utilization of visible light. More importantly, it also could accelerate charge separation/transfer leading to enhanced photoelectrochemical (PEC) performance of BiFeO 3 @TiO 2 . Based on these excellent optoelectronic performances of BiFeO 3 @TiO 2 composite, a PEC aptasensor with “turning on” signal mechanism was constructed by aminated aptamer as a biorecognition probe. The constructed PEC aptasensor performed gratifying analytical property toward MC-LR with a low detection limit of 0.016 pM (S/N = 3) and a wide detection range (5.0 × 10 −5 ∼ 2.5 × 10 2 nM). This PEC aptasensor possessed promising potential application value for its precise selective and ultrasensitive for MC-LR in practical analysis.
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高影响因子
AATCC Journal of Research
·
2024
·
IF 0.6
Jun Xu,Yuhang Wen,Qiqi Chang,Tianxu Hao,Tianhong He,Jian Zhang,Lei He,Chenxu Zhang,Yuanjun Liu
SnO2 is a wide-band gap N-type semiconductor material with a higher electron transfer rate than TiO2. Therefore, SnO2 has broad application prospects in the photoanode composite materials of dye-sensitized solar cells (DSSC). In this study, SnO2–TiO2 composite nanofibers with different molar ratios (5%, 10%, 15%, and 20%) were prepared by double-needle electrospinning technology, and the nanofibers were characterized after adjusting the solution composition. Different molar ratios of TiO2 and SnO2–TiO2 composite nanofiber photoanodes were fabricated by spin-coating, and the adsorption behavior of dyes on the photoanodes was investigated. Moreover, the electrochemical impedance of the photoanodes and DSSC and their photoelectric performance were also tested. The experimental results showed that SnO2–TiO2 composite nanofibers with a molar ratio of 10% exhibited excellent properties, including a peak specific surface area of 93.01 m2/g, strong dye adsorption capacity, small interfacial resistance, and fast electron transfer rate. These outstanding properties significantly promoted the generation of photoelectrons and improved the photoelectric conversion efficiency of DSSC. Compared with single-component TiO2, the photoelectric conversion efficiency of SnO2–TiO2 nanofiber photoanode composite material improved by 85.65%.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·
IF 2.2
Zhu Wenjun,Zhang Bofeng,Kuang Jiaming,Zhang He,Cui Yang,Liu Pinle,Xie Mengzhen,Xiao Yuchen
Herein, TiO 2 -coated carbon cloth (CC) substrates were successfully synthesized. The relationship between heat treatment temperature and the structure and electrochemical performance of the CC/TiO 2 composites was examined, and a feasible model was proposed based on the structural evolution process under different heat treatment temperatures. As the temperature was increased from 450°C to 900°C, the morphology of the TiO 2 coating was transformed from nanocube particles to nanorods, and a mixed structure of particles and nanorods was obtained for CC/TiO 2 -800°C. As the anode electrode for lithium-ion batteries (LIBs), the CC/TiO 2 -800°C composite material presents superior structural stability and electrochemical performance; the initial discharge/charge specific capacities are 2372 and 1989 mAh/g (coulombic efficiency of 83.9%), and a satisfactory specific capacity of 994 mAh/g can be achieved under the condition of 0.5 A/g and 130 cycles. The excellent electrochemical properties can be explained by the unique structure. The CC substrate has high electrical conductivity, significantly enhancing the electron transfer performance of the composite materials. In addition, electron transport in three dimensions can be realized as a result of the synergistic effect of the CC substrate and TiO 2 coating composed of nanoparticles and nanorods. Moreover, the mixed structure of the TiO 2 coating reduces the diffusion distance of Li + ions and suppresses the volume variation during the electrochemical reaction.
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高影响因子
Frontiers of Materials Science
·
2024
·Vol. 18
·期 3
·1-12
·
IF 2.5
Wang Wenshuang,Pan Xingya,Zhang Xinxin,Wang Minglin,Wang Zijia,Feng Lingzhi,Wang Xiaolei,Zhao Kongyin
Combining molecular imprinting technique with titanium dioxide (TiO 2 ) photocatalysis technique can improve the degradation ability and selectivity of TiO 2 nanoparticles towards pollutants. In this work, methyl orange-imprinted polysiloxane particles (MIPs) were synthesized using TiO 2 as matrix and silane as functional monomers. The adsorption capacity ( Q e ) of MIPs was 20.48 mg·g −1 , while the imprinting efficiency (IE) was 3.4. Such MIPs exhibited stable imprinting efficiencies and adsorption efficiencies towards methyl orange (MO) in the multi-cycle stability test. Photocatalytic degradation performances of both MIPs and non-imprinted polysiloxane particles (NIPs) were investigated. Compared with NIPs, MIPs exhibited better photocatalytic degradation performance towards MO, with the degradation efficiency of 98.8% in 12 min and the apparent rate constant ( K obs ) of 0.077 min −1 . The interaction between silane and MO was also studied through molecular dynamics simulation. This work provides new insights into the use of silane for the synthesis of MIPs as well as the molecular imprinting technique for applications in the field of TiO 2 photocatalysis.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Huimin Shi,Hang Zhang,Zhi Chen,Tao Wang,Lei Wang,Wei Zeng,Guanhua Zhang,Huigao Duan
Titanium nitride (TiN) has been attracting increasing interest as an anode material for electrochemical energy storage and conversion systems due to its superior thermal stability, electrical conductivity and chemical durability. The most commonly used strategy to synthesize TiN nanostructures is nitriding TiO 2 nanostructures using ammonia gas as the nitrogen source, and thus is not environmental friendly. Herein, we report an ammonia-free strategy to synthesize TiN nanomaterials using TiO 2 precursors via a magnesium-assisted nitriding reaction using nitrogen gas (N 2 ) as the nitrogen source. Systematical studies were conducted to reveal the mechanism of magnesium-assisted nitriding process in constructing TiN nanostructures under N 2 atmosphere. The as-synthesized TiN NRs were directly used as the anodes for lithium ion batteries and delivered an excellent reversible capacity of 710 mAh g −1 at the current density of 100 mA g −1 after 200 cycles. In addition, the TiN NRs also exhibited excellent cycling stability and rate capability. Our work provides a low cost, environmental friendly and reliable strategy to synthesize TiN materials from TiO 2 by using N 2 as the nitrogen source, which may facilitate the practical applications of TiN materials in electrochemical/photo-electrochemical energy storage and conversion systems.
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高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Xingxu Gao,Lei Sheng,Menglin Li,Xin Xie,Ling Yang,Yun Gong,Min Cao,Yaozong Bai,Haoyu Dong,Gaojun Liu,Tao Wang,Xianli Huang,Jianping He
Commercial polyolefin separators often cause explosions and thermal runaways in lithium-ion batteries due to their poor thermal stability. Therefore, various polymer separators with high thermal stability have attracted the attention of researchers. In this paper, a kind of special nano-TiO2/Polyimide (TiO2@PI) composite separator was prepared by adding nano-TiO2 particles with certain content to the PAA solution before electrospinning. It is found that the added TiO2 ceramic particles greatly improve the flame retardant performance of the separator, and at the same time, they inhibit lithium dendrites and prevent the internal short circuit of the battery. As a result, the TiO2@PI nanofiber separator (5.0-TiO2@PI) prepared by a spinning solution with a TiO2 concentration of 5.0 wt % is formed by connecting spherical beads with a diameter of about 500 nm, which greatly inhibits lithium dendrites. It has better properties, such as electrolyte uptake (721%) and ionic conductivity (2.52 mS cm–1). The LiCoO2/Li battery based on 5.0-TiO2@PI nanofiber separator has a higher discharge capacity even at a current density of 4 C, which is better than that of PE separator. The use of this 5.0-TiO2@PI nanofiber separator has enlightening significance for the safety of high energy density batteries.
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高影响因子
Advanced Materials Technologies
·
2021
·Vol. 7
·期 6
·2101169
·
IF 7.848
Wei Liu,Xue Wang,Zhiyang Zhao,Xin Zhou,Shiliang Huang,Longjin Huang,Zihan Wang,Jingru Li,Junjie Fu,Yu Liu,Sheng Cui,Xuan He
Flexible surface-enhanced Raman spectroscopy (SERS) substrates have received more and more attention for their non-invasive sample collection ability. However, majority of them have poor stability and reproducibility because noble metal is easily oxidized and led to lose SERS activity. Herein, SiO 2 -TiO 2 -Ag hybrids aerogel (STAHA) material is first applied as a flexible SERS substrate for explosives and dyes long-term sensitive detection. The sensitive non-invasive detection of 3-nitro-1, 2, 4-triazol-5-one (NTO) residues can be achieved with a limit of 1 × 10 −6 m by wiping sample collection method. Meanwhile, similar SERS sensitivity from long-term (50 days) kept substrates is observed compared with fresh-made substrates. This long-term sensitivity is contributed to electronic transfer compensation from TiO 2 aerogel. This proposed flexible STAHA enrich the type of SERS substrates, and their long-term sensitivity can provide a prospective application for trace analyses of explosives and other hazardous residues in criminal forensic, military, and security check.
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高影响因子
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