Energy Technology
·
2018
·Vol. 7
·期 8
·1800829
·
IF 3.175
Bin Xiao,Peng-bo Wang,Zhen-jiang He,Zhuo Yang,Lin-bo Tang,Chang-sheng An,Jun-chao Zheng
0.5Li 2 MnO 3 ·0.5LiNi 0.5 Mn 0.3 Co 0.2 O 2 cathode materials with nano-MgO and nano-TiO 2 coating layers are synthesized via a facile approach. These nanocoating layers with a thickness of ≈20 nm are homogeneously coated on the surface of the materials. With the nano-MgO and nano-TiO 2 coating layers, the modified materials deliver excellent electrochemical performance. Nano-MgO-coated and nano-TiO 2 -coated Li-rich materials exhibit 147.56 and 137.96 mAh g −1 after 100 cycles at 1C rate and deliver 156.13 and 130.69 mAh g −1 at 2C rate, respectively, in the voltage range of 2.0–4.8 V. The materials with nano-MgO and nano-TiO 2 coating layers also show a high discharge voltage retention of more than 90% after 50 cycles, low impedance for Li + migration, and high diffusion coefficients of the lithium ions. Nano-MgO and nano-TiO 2 coating layers help decrease the content of Li 2 CO 3 on the surface of the materials and suppress side reactions. Thus, these materials play a significant role in strengthening the electrochemical performance of Li-rich cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2015
·Vol. 407
·期 29
·8803-8812
·
IF 3.436
Geng Hao Ran,Miao Shan Shan,Jin She Feng,Yang Hong
A new surface molecularly imprinted polymer (MIP) based on nano-TiO 2 was developed using propazine (Pro) as a template molecule, ethyleneglycol dimethacrylate (EGDMA) as a crosslinker, methacrylic acid (MAA) as a functional monomer, and 2,2′-azobis (isobutyronitrile) (AIBN) as an initiator. Structures of the newly synthesized surface MIPs were characterized by Fourier transmission infrared spectrometry (FT-IR), scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD). The MIP had a good adsorption capacity and high recognition selectivity to propazine. Meanwhile, it exhibited a cross-selectivity for simazine (Sim) and atrazine (Atr). The MIPs were used as a solid phase extraction (SPE) material. Concomitant extraction, purification, and determination of three pesticides (Pro, Sim, and Atr) residues in water, soil, and maize plant and grain samples were performed by MIP-SPE coupled with high performance liquid chromatography (HPLC). The highly selective separation and enrichment of Pro, Atr, and Sim from the complex environmental media can be achieved. Thus, the newly developed technique provides an analytical platform to quantify the trace amount of Pro, Sim, and Atr residues in multi environmental media and food source.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Kexin Zhang,Jie Song,Ce Liang,Kaifeng Yu
To overcome the performance bottleneck caused by the single-structure optimization of TiO 2 -based anode materials and to explore a new approach for the resource utilization of agricultural waste, this study synthesized nano-TiO 2 particles (TiO 2 -NP) via a co-precipitation and hydrothermal method. Porous carbon spheres (CSHC) were prepared using discarded corn stalk pith as a carbon source through a hydrothermal carbonization and high-temperature calcination coupling process. Subsequently, TiO 2 -NP was in situ grown onto CSHC, forming a nano-TiO 2 /corn stalk pith carbon sphere composite material (TiO 2 -NP/CSHC), thereby achieving the synergistic enhancement of nano-TiO 2 and biomass-derived carbon. This design not only alleviates the agglomeration of TiO 2 but also significantly enhances the electrochemical performance of the composite material via a three-dimensional conductive carbon network. The prepared TiO 2 -NP/CSHC exhibits a high specific surface area of 101.2 m 2 g −1 and a well-developed porous structure, delivering excellent lithium and sodium storage performance as an anode material for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). At a current density of 0.2C, after 100 cycles, the discharge specific capacities were maintained at 1182.5 mA h g −1 and 675.3 mA h g −1 , respectively. Through the structural and functional synergy of TiO 2 -NP and CSHC, the composite material simultaneously achieves high capacity, long cycling stability, and fast charge/discharge capability, while also offering environmental sustainability and cost-effectiveness.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
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环境可持续性
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 70
·43193-43203
·
IF 3.119
Jianing Li,Junzhong Wang,Juming Liu,Yan Li,Huiyan Ma,Jucai Yang,Qiancheng Zhang
Nano-TiO2 is a type of environment-friendly and inexpensive substance that could be used for photocatalytic degradation processes. In this study, the multi-type carbon species doped and modified anatase nano-TiO2 was innovatively synthesized and developed to overcome the deficiency of common nano-TiO2 photocatalysts. The multi-type carbon species were derived from tetrabutyl titanate and ethanol as the internal and external carbon sources, respectively. Meanwhile, diverse characterization methods were applied to investigate the morphology and surface properties of the photocatalyst. Finally, the visible-light photocatalytic degradation activity of the collected samples was evaluated by using methyl orange as a model pollutant. The promotion mechanism of multi-type carbon species in the photocatalytic process was also discussed and reported. The results in this work show that the doping and modification of multi-type carbon species successfully narrows the bandgap of nano-TiO2 to expand the light absorption range, reduces the valence band position to improve the oxidation ability of photogenerated holes, and promotes the separation of photogenerated charge carriers to improve quantum efficiency. In addition, the further modification of the external carbon source can promote the surface adsorption of MO and stabilize the multi-type carbon species on the surface of nano-TiO2.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESIGNED MONOMERS AND POLYMERS
·
2017
·
IF 1.139
Yazhen Wang,Yutao Di,Shaobo Dong,Zijian He,Xueze Zhang,Jia Shi,Tianyu Lan
(3-(tert-butylperoxy)propyl) trimethoxysilane (TBPT), is a tailor-made new style silane coupling agent with peroxide group, which have ability of initiating polymerization. This study used TBPT to generate free radical, and initiated the polymerization of acrylonitrile (AN), thereby forming polyacrylonitrile (PAN) in two approaches, thermal initiation system and redox initiation system. Meanwhile this study bonded TBPT onto nano-TiO2 to get modified nano-TiO2 by means of the coupling function of TBPT, and then made the peroxide group of the modified nano-TiO2 decompose and initiate the polymerization of AN in thermal initiation system and redox initiation system respectively. The products were investigated and analyzed by FTIR, XPS and TG. The result showed that on one hand, in the products of the thermal initiation there was PAN, which both attached and unattached to the modified nano-TiO2; on the other hand, in the products of the redox initiation system the PAN unattached to the modified nano-TiO2 was produced, while the PAN attached to the modified nano-TiO2 was not.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 32
·e52750
·
IF 3.057
Jingjing Li,Yihua Cui,Kangle Wu,Chuangchuang Sun
UV curing three-dimensional printing (3DP) technology has been developing rapidly due to its high molding accuracy and low cost. However, the curing shrinkage rate of the existing UV curing 3DP materials is still high. The use of inorganic particles to reduce the curing shrinkage of 3D printing materials has received more and more attention in recent years, but the poor dispersibility of inorganic particles in the photosensitive resins has not been effectively solved. In this paper, nano-TiO 2 particles were treated by KH570 in advance and the surface of which were grafted by thiol-terminated hyperbranched polymer (THBP), hereby THBP@TiO 2 was obtained. The results showed that by incorporating of 5 wt% THBP@TiO 2 , the volume shrinkage rate of epoxy acrylate (EA)-based photosensitive resins decreased from 8.95% to 4.18%. The THBP@TiO 2 combined the anti-shrinkage mechanism of thiol-based hyperbranched polyester with that of and inorganic nanoparticles. Otherwise, surface grafting of THBP may effectively improve the dispersibility of nano-TiO 2 particles in EA-based photosensitive resin by reducing the nano-TiO 2 particles surface energy, and increase the load transfer capacity. The impact strength of 5 wt% THBP@TiO 2 modified photosensitive resin increased from 11.2 to 18.1 kJ/m 2 .
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
·
2018
·
IF 3.165
Fanlei Kong,Zhihong Nie,Zhongpo Liu,Shibin Hou,Jiangfeng Ji
The technique of anterior cervical corpectomy and fusion (ACCF) for strut grafting has become a widespread and actively applied for many cervical complaints including cervical degeneration of the intervertebral disks , cervical trauma , cancer, rheumatoid arthritis and multilevel cervical spondylotic diseases. To avoid the complications of the old techniques, the construct stability and long anterior screw-plate designs of the bone strut have been improved by using effective biomaterials. The nanostructured hydroxyapatite (HAp) incorporated with biocompatible polymer matrixes is an effective biomedical material and creating a functional properties applied for different tissue replacements such as dental, hips, knees , tendon and ligaments and tissue repair for maxillofacial reconstruction , stabilization of the jaw bone and spinal fusion . In the present investigation, we have successfully designed cylindrical nano titanium dioxide (n-TiO 2 ) interbody fusion with anterior plate fixation . The n-TiO 2 incorporated HAp/ Polyetheretherketone (PEEK) nanocomposite strut has a superior mechanical properties and larger contact area with high fusion rates as compared with the HAp/PEEK strut in the absence of n-TiO 2 nanoparticles . It is highly able to provide appropriate strength and biological activity similar to the conventional titanium cage and also mainly it has been minimizes subsidence value. The synthesized novel material of n-TiO2 incorporated HAp/PEEK nanocomposite strut is scientifically given effective outcomes for fusion and reconstruction of the ACCF.
研究领域:
生物医学工程
·
骨科手术
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材料科学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-11
·
IF 4.011
Sun Saiwu,He Huijun,Yang Chunping,Cheng Yan,Liu Yongpan
In this study, the adsorption and UV photocatalytic degradation of atrazine using nano-TiO 2 particles were studied systematically, and the colloidal stability of nano-TiO 2 particles in solution was also investigated to reveal the removal mechanism. Experiments which contained the first 6.0 hours darkness and 4.0 hours UV illumination later were conducted at different concentrations of Ca 2+ and/or fulvic acids (FA) at pH = 7.0. Results showed that the adsorption rate of atrazine onto nano-TiO 2 particles decreased with the increase of Ca 2+ and/or FA concentrations, which could be explained well by the colloidal stability of nanoparticles. When the solution contained Ca 2+ or Ca 2+ -FA, the nanoparticles were aggregated together leading to the decrease of the contact surface area. Besides, there existed competitive adsorption between FA and atrazine on the particle surface. During photocatalytic degradation, the increase of Ca 2+ and/or FA concentration accelerated the aggregation of nano-TiO 2 particles and that reduced the degradation efficiency of atrazine. The particle sizes by SEM were in accordance with the aggregation degree of nanoparticles in the solutions. Sedimentation experiments of nano-TiO 2 particles displayed that the fastest sedimentation was happened in the CaCl 2 and FA coexistent system and followed by CaCl 2 alone, and the results well demonstrated the photodegradation efficiency trends of atrazine by nano-TiO 2 particles under the different sedimentation conditions.
研究领域:
环境科学
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化学工程
·
水处理
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 101
·98761-98767
·
IF 3.289
Liqun Ma,Shaobo Dong,Zijian He,Yulin Yang,Hongge Jia,Yutao Di,Yanan Tang,Yazhen Wang
In order to develop a new silane coupling agent that can be used as coupling agent and initiator, (3-(tert-butylperoxy)propyl)trimethoxysilane was synthesized by using tert-butyl hydroperoxide and (3-chloropropyl) trimethoxysilane. The new reagent was characterized by 1H-NMR, FT-IR and mass spectroscopy. The thermokinetics of the new reagent was investigated, including thermal stability, decomposition constants (Kd), activation energy (Ea), the heat of decomposition (ΔH) and pre-exponential factor (Ad). In addition, the application of (3-(tert-butylperoxy)propyl)trimethoxysilane on modificating nano-TiO2 and initiating polymerization was studied. The structures of the products of modificating nano-TiO2 and initiating polymerization were verified by XPS, FT-IR. The results indicated that the new reagent had the characteristics of a coupling agent and initiator.
研究领域:
材料化学
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Hanli Wang,Bianli Quan,Jun Xu,Dongyu Li
In this study, the corrosion environment in the evaporation stage of alumina production by the Bayer process was simulated, and TiO2-MMT/EP composite coating was prepared on the surface of Q235 steel. Montmorillonite (MMT) was functionalized via cation exchange and surface grafting using 3-aminopropyl triethoxysilane (KH550), enabling the introduction of organic groups onto the MMT surface and intercalation into its interlayer spacing. After compounding with titanium dioxide, the interlayer spacing of MMT was enlarged (from 1.27 to 2.13 nm) and its hydrophobicity was enhanced (contact angle from 48.14° to 105.6°). TiO2-MMT was added to epoxy resin (EP) to prepare a composite coating with multidimensional synergistic effect. The results show that the composite material can effectively fill the EP microhole defects, and the surface roughness of the coating is only 1.7 nm (pure EP is 65.5 nm). Electrochemical tests reveal that the corrosion current density (Icorr) was 1.126 × 10–5 A·cm–2, the protection efficiency was 98.40%, and the charge transfer resistance (Rct) reached 696.1 Ω·cm2, indicating that the coating effectively prolonged the diffusion pathways of corrosive ions through.
研究领域:
材料科学
·
化学工程
·
表面工程
·
腐蚀科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FLOW TURBULENCE AND COMBUSTION
·
2023
·Vol. 111
·期 2
·697-715
·
IF 2.4
Luo Junxiao,Shi Weidong,Chen Liang,Fang Guofeng,Zhang Liang
Nanofluids have become more and more attractive to the modern industry due to their high performance in heat transfer and combustion. As one of the key influencing factors, the atomization mechanism of nanofluids induced by airflow is more complex than that of pure liquids, which has attracted great attention recently. In this study, the spray characteristics of TiO 2 –propylene glycol nanofluids were investigated by focusing on the effects of nano-TiO 2 additives on atomization. On the basis of high-speed shadow imaging, the spray morphology of the base fluid injected from an air atomizing nozzle under different pressures was analyzed first. Then a laser particle size analyzer was used to obtain the droplet size distribution of the nanofluids. The air pressure at the inlet of the atomizer was found to have more contribution to the atomization of nanofluids. And when the air pressure exceeded 0.35 MPa, the Sauter mean diameter (D 32 ) of the base fluid droplets was insensitive to the change of air pressure. Subsequently, the contribution of nanoparticles to atomization was discussed. An empirical correlation was proposed between the Sauter mean diameter (D 32 ) and the dimensionless parameters such as the gas Weber number (We g ), liquid–gas momentum ratio (q), and the volume fraction of nano-TiO 2 , etc. Results indicated that adding nanoparticles enhanced the jet stability by increasing the viscosity at a low jet velocity, while the jet instability was increased due to the nanoparticles promoting the cavitation at a high jet velocity.
研究领域:
热能工程
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机械工程
·
流体力学
·
材料科学
✓ 已验证
DOI
高影响因子
POWDER TECHNOLOGY
·
2023
·
IF 5.2
Ming Liu,Guoqiang Shao,Pengpeng Lv,Jun Li,Qingshan Zhu
The fluidization quality significantly affects the mass transfer and the deposition reaction, which determine the uniformity of deposited TiO 2 thin films on fluorophlogopite particles. It was found that the effective addition ratio of nano-TiO 2 particles is above 0.2 wt% to realize fluidization of fluorophlogopite particles. The addition of nano-TiO 2 particles leads to competitive deposition between free TiO 2 particles and fluorophlogopite particles, which decreased the coating rate of TiO 2 on fluorophlogopite particle. Besides, the existence of free TiO 2 particles on pearlescent pigment particles decreases the glossiness. The gas-solid ratio primarily determines the number of the free TiO 2 particles on pearlescent pigment particles. It was summarized that the optimal value of addition ratio of nano-TiO 2 is 0.4 wt% with the gas-solid ratio of ∼0.05 m 3 kg −1 h −1 to enhance the fluidization quality on the one hand, and to reduce the free TiO 2 particles on the other hand.
研究领域:
化学工程
·
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）