SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Bin Li,Jing Xue,Xin Lv,Ruochen Zhang,Kaixuan Ma,Xianwen Wu,Lei Dai,Ling Wang,Zhangxing He
Rechargeable aqueous zinc ion batteries have attracted significant attention because of their non-toxicity, high theoretical capacity, and low cost. However, many challenges regarding zinc anodes have hindered the development of zinc ion batteries , such as the growth of zinc dendrites, passivation and hydrogen evolution . In this study, a simple strategy based on porous rutile nano-TiO 2 coating was used to guide uniform deposition of zinc ions to inhibit the formation of zinc dendrite. The TiO 2 coated zinc anode shows excellent electrochemical performance . Therefore, for Zn Zn symmetric cell, the zinc anode protected by TiO 2 coating shows reduced voltage hysteresis (50 mV at 0.4 mA cm −2 ). Moreover, for Zn-MnO 2 full cell, the cell with TiO 2 coating also shows excellent cycling performance. The discharge capacity of Zn-MnO 2 full cell is only 27.69 mAh g −1 after 500 cycles, while discharge capacity of Zn@TiO 2 -MnO 2 full cell is up to 89.14 mAh g −1 . This excellent electrochemical performance may be attributed to improved wettability of TiO 2 coated zinc anode, the uniform deposition of Zn 2+ and reduction of Zn dendrites. Overall, this study provides a simple and beneficial strategy for future development of rechargeable aqueous zinc ion batteries .
研究领域:
材料科学
·
电化学
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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.
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高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 7
·3913-3925
·
IF 3.809
Zhao Yongsheng,Dang Wanbin,Lu Zhaoqing,Deng Junbo,Hao Yang,Su Zhiping,Zhang Meiyun
Abstract Aramid fiber-based composite paper is widely used as an engineering material that is often used in outdoor environments. This inevitably cause ultraviolet (UV) damage to aramid fibers. In this work, nanotitanium dioxide (nano-TiO 2 ) was introduced to endow the composite a good UV-resistance while nanofibrillated cellulose (NFC) was used to disperse and deposit TiO 2 nanoparticles onto aramid fibers by physical interaction. Firstly, TiO 2 nanoparticles were treated by (γ-aminopropyl) triethoxysilane to achieve abundant amino-groups (–NH 2 ), which can interact with hydroxyl groups (–OH) of NFC. The results showed that NFC can significantly suppress nano-TiO 2 aggregation and result in a well-defined core–shell structure of TiO 2 nanoparticles uniformly coated onto aramid fibers. Also, the bridge effect of NFC and the reinforcing effect of nano-TiO 2 benefit the mechanical properties the aramid/NFC/TiO 2 composite. The maximum tensile index (~ 16.42 N m/g) and maximum tearing index (~ 9.28 mN m 2 /g) of aramid/NFC/TiO 2 composites increase by ~ 43.4 and ~ 26.1% in comparison with the control sample (~ 11.45 N m/g and ~ 7.36 mN m 2 /g), respectively. Meanwhile, the aramid/NFC/nano-TiO 2 composite achieves a good UV-resistant property because of the dominant light-absorbing ability of well-dispersed TiO 2 nanoparticles. Therefore, our work presents a green and damage-free approach to achieve high-performance aramid fiber composite especially with great UV resistance.
Graphical Abstract
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高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 9
·2797-2809
·
IF 5.721
Moumita Maiti,Manas Sarkar,Donghong Liu
Nicotine (C10H14N2), a hygroscopic molecule, has long been the focus of intensive research due to its rising number of detrimental impacts on human health, associated with the neuroactive alkaloid in tobacco. Water contamination in the form of nicotine substances is a serious issue, where clean water is one of the basic demands for living systems. This study reports exclusively on nicotine degradation and adsorption activity from its aqueous solution through an anatase-phase nano-TiO2 (20 ± 5 nm)-decorated reduced graphene oxide (rGO–TiO2) composite under ultraviolet (UV) and visible-light irradiation, respectively. In this study, XRD, XPS, FT-IR, Raman, UV-DRS, TEM, and BET analyses were applied for the characterization of the structural, optical, and surface morphological properties of rGO–TiO2. About 80% nicotine (1 mM) decomposition was found using 2 mg rGO–TiO2 after 90 min of UV light exposure, while 60% nicotine (1 mM) adsorption at the surface of the rGO–TiO2 (3 mg) was detected within 90 min of visible light illumination. A kinetic study on free radical generation (O2˙−, ˙OH, 1O2) demonstrated that the rGO–TiO2 nanosystem had a substantial rate (1.7-fold higher than TiO2) of ROS formation. Raman shifts showed the defects in the sp3-hybridized carbon of rGO due to the attachment of TiO2 NPs, thereby altering the electronic energy states of the rGO–TiO2 nanocomposite and leading to its superior adsorption via π–π and cation–π interactions. Nicotine degradation was perceived to follow the pseudo-first-order kinetic law, while the nicotine-adsorption activity due to chemisorption on the disordered rGO–TiO2 surface could be expressed via the Langmuir isotherm model. The application of the rGO–TiO2 nanohybrid is highly suggested to be beneficial on an industrial basis for nullifying the nicotine-prompted carcinogenic effects in aquatic systems.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2015
·
IF 5.337
Huanzhi Zhang,Yongjin Zou,Yujia Sun,Lixian Sun,Fen Xu,Jian Zhang,Huaiying Zhou
Phase-change materials (PCMs) have promising applications in the fields of solar energy storage, energy conservation in buildings , thermal insulation , and thermal regulation. In this study, novel multifunctional composite films were prepared via a thermosetting process using poly(vinyl chloride) (PVC) as a film matrix, microencapsulated PCMs (micro-PCMs) as a temperature-regulating additive and TiO 2 nanoparticles (nano-TiO 2 ) as a UV-blocking additive. The latent heat of the film fabricated with 6 wt% micro-PCMs and 6 wt% nano-TiO 2 is 9.226 J/g. The film also shows high thermal stability, with no obvious change in thermal performance after 100 heating–cooling cycles. The temperature of a space enclosed by the film fabricated with 6 wt% micro-PCMs and 6 wt% nano-TiO 2 can be controlled in the range 25–28 °C for 3298 s. The composite films exhibit a significantly decreased UV transmittance due to the UV absorption of nano-TiO 2 . Furthermore, the thermal conductivity of the sample fabricated with 6 wt% micro-PCMs and 6 wt% nano-TiO 2 is 0.2356 W/(m K), which is comparable with that of a pure PVC film. These findings indicate that the novel thermal-insulating film is promising for use in energy-efficient building and automobile applications.
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高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Lei Chen,Zhouyi Xiong,Hanguo Xiong,Zhenjiong Wang,Zia-ud Din,Asad Nawaz,Pengkai Wang,Chun Hu
The nano-TiO 2 was utilized to improve the bonding performance, structure stability and film-forming properties of renewable starch-based wood adhesive. The results showed that 4% nano-TiO 2 (nano-TiO 2 :starch, w;w) resulted in 6.5 MPa of shear strength and 6437 Pa.s of viscosity. The thermal stability was measured by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Additionally, low-field nuclear magnetic resonance (NMR) and rheological results exhibited the enhancement of nano-TiO 2 on the pseudoplasticity and structure which determined the state and migration of water. Besides, the structural characterization of copolymer was analyzed via fourier transform infrared spectroscopy (FTIR) and X-ray diffraction analysis (XRD). Furthermore, the film-forming property was evaluated by small angle X-ray scattering (SAXS) and dynamic mechanical analysis (DMA). The morphological structures of adhesive were observed by scanning electron microscopy (SEM). In conclusion, the 4% nano-TiO 2 (nano-TiO 2 :starch, w;w) can be employed to prepare starch-based wood adhesives with superior properties for wood application.
研究领域:
材料科学
·
木材科学与技术
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DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 24
·245401
·
IF 3.5
Wenjing Fu,Cundi Wei,Shaonan Xu,Enhui Wang,Jinyi Zhang,You Xu,Jiyuan Zou,Jilun Wei,Jing Zuo
A particular bird's nest-like pseudo-boehmite (PB) composed of cohesive nanostrips was prepared by a novel and facile approach based on the reaction of Al–Ga–In–Sn alloy and water, together with ammonium carbonate. The PB possesses a large specific surface area (465.2 m2 g−1), pore volume (1.0 cm3 g−1), and pore diameter (8.7 nm). Subsequently, it was utilized as a precursor to form the TiO2/γ-Al2O3 nanocomposite for tetracycline hydrochloride removal. The removal efficiency can reach above 90% at TiO2:PB = 1:1.5 under the Sunlight irradiation simulated by a LED lamp. Our results indicate that the nest-like PB is a promising carrier precursor for efficient nanocomposite catalysts.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMER
·
2026
·
IF 5.1
Jiapeng Ye,Deming Zhou,Lifan Li,Chenji Zhang,Leyan Li,Kun Luan,Zaixing Zhang,Lingxiao Jing,Ruizhi Xue,Tonghua Zhang
Poly(p-phenylene-2,6-benzobisoxazole) (PBO) fiber, made from a rigid-rod isotropic crystal polymer, exhibits exceptional tensile strength, thermal stability, and creep resistance, surpassing Kevlar fiber (one of high-performance bullet proof fibers) with twice the strength and modulus. However, UV exposure cleaves the oxazole rings in PBO’s molecular structure, leading to decreased crystallinity, reduced mechanical strength, and limited suitability for outdoor applications. This study introduces a novel surface enhancement method using an olefin addition reaction with an azobenzene polyepoxy (Bt-APDB-BA-GMA) coating for Ultraviolet (UV) resistance. Further combining this with nano titanium dioxide (TiO 2 ) forms an organic-inorganic layer for additional protection. Comparative studies were conducted on three samples, including original PBO fibers (PBO), PBO fibers modified with azobenzene/epoxy copolymer (PBO/azo-epoxy), and PBO fibers modified with both azobenzene/epoxy copolymer and nano TiO 2 (PBO/TiO 2 @azo-epoxy). Modified fibers showed significant improvements: PBO/TiO 2 @azo-epoxy exhibited a 63 % higher pull-out strength (34.58 MPa) and retained 78.2 % tensile strength after 288 hours of UV aging, compared to 28.2 % for unmodified fibers. This innovation enhances PBO fiber durability, UV resistance, and interfacial bonding, paving its way for broader applications in body armor, aircraft, and advanced technologies.
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高影响因子
JOURNAL OF APPLIED TOXICOLOGY
·
2024
·
IF 2.7
Hongmei Chang,Siqi Zhao,Yuzhu Lei,Yunhua Hu,Yizhong Yan,Guanling Song
Titanium dioxide nanoparticles (nano-TiO 2 ) can cause a reduction in sperm counts, and lactate production in Sertoli cells plays a key role in spermatogenesis. The aim of this study was to evaluate the effect of nano-TiO 2 on lactate production in mouse Sertoli cell line (TM4 cells) and to investigate whether the effect is mediated through the PI3K/AKT/HIF-1α pathway. After TM4 cells were treated with different concentrations of nano-TiO 2 for 48 h, cell viability, contents of glucose and lactate, and the expression levels of GLUT3 and key enzymes (HK1, HK2, PFKM, ENO1, LDH) during lactate production were detected. PI3K/AKT/HIF-1α pathway proteins were measured. In addition, PI3K agonist (IGF-1) was added to explore whether nano-TiO 2 regulates HIF-1α through PI3K/AKT pathway, thereby affecting the production of lactate in TM4 cells. The results showed that nano-TiO 2 significantly inhibited TM4 cell viability, increased glucose content, decreased lactate content, and downregulated the expression levels of GLUT3 and key enzymes during lactate production. Meanwhile, nano-TiO 2 decreased the expression of PI3K/AKT pathway phosphorylated proteins and HIF-1α, and IGF attenuated this effect of nano-TiO 2 . Collectively, nano-TiO 2 downregulated the expression level of proteins and enzymes related to lactate production in TM4 cells by inhibiting PI3K/AKT/HIF-1α pathway, resulting in the decrease of lactate production in TM4 cells.
研究领域:
生殖生物学
·
细胞生物学
·
纳米技术
·
分子生物学
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DOI
PubMed
高影响因子
Nanotoxicology
·
2016
·
IF 7.913
Liwen Qiang,Xiaoyu Pan,Lingyan Zhu,Shuhong Fang,Shengyan Tian
Nano-titanium dioxide (nano-TiO2) is one of the most universal engineered nano-materials while perfluorooctanesulfonate (PFOS) is a typical new persistent organic pollutant. They are widely used and present in aquatic environment. In this study, a novel semi-static multilayer microcosm was setup to investigate the impacts of nano-TiO2 on PFOS bioaccumulation in fish species [Danio rerio (D. rerio), Ctenopharyngodon idella (C. idella), Hypostomus plecostomus (H. plecostomus)] living in different vertical layers. As a result of aggregation and deposition, the concentration of TiO2 increased from upper to bottom layers in the water column. Concomitantly, due to adsorption of PFOS on the nano-TiO2 particles, PFOS also displayed an increasing trend from upper to bottom layer. Owing to ingestion of the TiO2–PFOS complexes, more PFOS was taken-up by fish. With the aid of intestinal fluid, PFOS was readily released from TiO2 particles and absorbed by fish. As a result, accumulation of PFOS in whole fish was facilitated and the bioaccumulation factors of PFOS in D. rerio, C. idella and H. plecostomus were 3.01, 2.42 and 1.11 times of that in the groups without TiO2. However, TiO2 aggregates were too large to penetrate biological membranes to participate body circulation, and no significant accumulation of TiO2 was observed in fish muscle. The results suggested that the ecological risk of PFOS could be enhanced due to the presence of nano-TiO2 in water.
研究领域:
环境科学
·
毒理学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Wenhao Yang,Dan You,Bingnan Deng,Zhicong Ni,Chunman Yang,Fei Wang,Yingjie Zhang,Xue Li,Yiyong Zhan,Yunxiao Wang
Lithium–sulfur (Li–S) batteries represent a promising energy storage system with the potential to replace traditional lithium-ion batteries. Recent research has explored the practical applications of Li–S batteries. However, due to the insulation properties of the sulfur components and the shuttle effect of polysulfides, the practical application of Li–S batteries is hindered by poor cycle stability and short life. In this study, we developed a controllable three-dimensional Ti 3 C 2 structure design process, and through in situ growth of TiO 2 nanocrystals, we prepared three-dimensional porous materials with TiO 2 @Ti 3 C 2 heterostructures. These materials constructed using two-dimensional lamellar Ti 3 C 2 function as a conductive skeleton to improve the conductivity of the sulfur cathodes, and through the in-situ growth of nano-TiO 2 to introduce more binding sites and provide more chemisorption sites to limit the dissolution and shuttle of polysulfides. In addition, the TiO 2 @Ti 3 C 2 heterointerface generated in situ on the surface of the lamellar structure can induce an internal electric field and increase active reaction sites, which promotes reaction kinetics, accelerates charge diffusion/transport, and promotes LiPS transformation. The materials designed in this study can effectively restrain the shuttle effect by realising the association process of adsorption, capture, and transformation of polysulfides. Thus, when applied as the sulfur cathode frame, it shows a high specific capacity of 1261.41 mAh g −1 at a rate of 0.1 C. In addition, a specific capacity of 66.5% is maintained over 500 cycles at a rate of 1 C. This strategy supports the development of Li–S batteries with extraordinary performance and opens up a promising way to design next-generation electrochemical energy storage devices.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
POLYMER INTERNATIONAL
·
2019
·Vol. 69
·期 2
·140-148
·
IF 2.433
Jianhua Zhou,Jiaojiao Zhao,Yanjiao Cui,Wenjing Cheng
A novel kind of bifunctional nanoencapsulated phase change material with thermal energy storage and ultraviolet absorption functions was successfully prepared through surfactant-free emulsion polymerization with reactive emulsifiers. These nanocapsules consisted of n-octadecane and n-butyl stearate as binary core materials and polyacrylate supplemented with titanium dioxide nanoparticles (nano-TiO2) as hybrid shell materials. The experimental results show that the monomer conversion and thermal conductivity increased and the particle size and distribution decreased with increase in nano-TiO2 content when the nano-TiO2 dosage was below 0.2 wt%. Fourier transform infrared spectroscopy and XRD confirmed that the binary phase change materials were well encapsulated inside the polyacrylate-TiO2 hybrid shell and nano-TiO2 was also successfully crosslinked in the nanocapsules. TEM demonstrated that the synthesized nanocapsules exhibited a regular spherical profile and a well-defined core–shell structure with diameter ranging from 70 to 100 nm. In addition, the results obtained from DSC, TGA and UV–visible spectrophotometry showed that the as-prepared nanocapsules had good thermal storage capacity, thermal stability and ultraviolet absorption properties. It can be considered that the resultant nanoencapsulated phase change materials with polyacrylate-TiO2 hybrid shell may have high feasibility and hold good promise in the applications of intelligent thermoregulation fabrics. © 2019 Society of Chemical Industry
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