ACS Omega
·
2024
·
IF 3.7
Xiaoru Hao,Zhihao Cheng,Yu Zhang,Jun Xie,Haikun Zheng,Chunxiao Yue,Wei Sheng
The operation of aerospace equipment is often affected by icing and frosting. In order to reduce the loss caused by icing in the industrial field, it is an effective method to prepare superhydrophobic coatings by modifying nanoparticles with low surface energy materials. In order to explore a method of preparing a superhydrophobic surface that can be popularized, a two-step spraying method was employed to create a superhydrophobic coating. The surface was characterized by Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (SEM). The optimal preparation process was obtained by analyzing the surface contact angle data. The results showed that stearic acid was grafted onto the surface of TiO2 by esterification reaction. The existence of long methyl and methylene hydrophobic groups in the tail of the stearic acid molecule made the modified TiO2 hydrophobic. It is verified that water molecules have strong adsorption on the surface of unmodified TiO2. Stearic acid molecules can reduce the interfacial energy in the system.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2021
·Vol. 23
·期 17
·10448-10455
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IF 3.676
Fengjiao Zhao,Feng Zhang,Dongxue Han,Kai Huang,Yang Yang,Hongming Yin
Solar to hydrogen (H2) conversion systems based on carbon nanomaterials have shown great potentials in the clean energy field recently. However, for most systems, energy level alignments and light-induced redox processes are still unclear, which hinder artificial designing for higher efficiency of solar energy conversion and further applications. Here we report 77% enhancement in the light-driven H2 generation efficiency of N,S co-doped carbon quantum dot (N,S-CQD) aqueous system by adding TiO2 nanoparticles. Using steady-state and transient spectroscopy, four specific energy levels of CQDs are confirmed with the band gaps of 3.55 eV (X4), 2.99 eV (X3), 2.76 eV (X2) and 1.75 eV (X1), respectively. The X2 energy band is highly active for H+ reduction with a longer lifetime of 13.38 ns. Moreover, the observed low efficiency of intrinsic transition from X3 to X2 band of N,S-CQDs accounts for the poor performance of solar to H2 conversion for pure N,S-CQDs based on H2 generation and detailed time-resolved spectroscopic results. The mechanism of H2 generation enhancement can be explained by multiple electron transfer processes between N,S-CQDs and TiO2 NPs where TiO2 NPs act as electron intermediates that efficiently transfer electrons from the inert band (X3) to the active band (X2) for H2 generation. This study enriches the fundamental understanding of N,S-CQDs and provides a new pathway toward high-performance N,S-CQD-based solar to H2 conversion systems.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2020
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IF 3.408
Ruimin Hu,Tao Fan,Jinlong Yang,Hang Xiao,Yiping Liu,Ming Lu
Recent years have witnessed the explosive progress of functional nano materials in textile field, requires us to re-recognize and understand the potential hazards of nanoparticles . A harmless, cost-effective and facile approach of growing functional particles with special morphology and immobilizing onto cellulose fabric (CF) to prepare functional fabrics is highly desired. Here, commercial TiO 2 nanoparticles (TiO 2 NPs) grow under ultrasound-microwave and form a flake-like structure, which retain excellent photocatalytic degradation ability and prevented the potential harm to human body when nanoparticles fell off. The method was implemented based on 4-methylmorpholine-N-oxide (NMMO) aqueous system which was approved as a favorable solvent for dissolving cellulose, and grew flake-TiO 2 on cotton fibers under the assistance of the ultrasound and microwave. The as-prepared TiO 2 -CF possessed satisfactory photocatalytic activity for Methylene blue (MB) and Rhodamine B (RhB) dyes under ultraviolet light with the low dye residue rate of about 5% and 1%, respectively. After 50 times rigorous washing procedures, the titania loading next to 18% was confirmed by thermogravimetric analysis , which proved that TiO 2 -CF had good wash fastness.
研究领域:
材料科学
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纺织工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE ENGINEERING
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2021
·
IF 3.169
Yan Zhang,Xinrui Zhu,Yujian Liu
A convenient fabrication approach is proposed for a durable superhydrophobic epoxy surface. By duplicating micro-rough topography of the template, covalently grafting with TiO2 nanoparticles, and treating with perfluorooctyltriethoxysilane, the surface shows superhydrophobicity with a high static contact angle (162.0°) and a low sliding angle (2.5°), respectively. And its WCA has hardly changed along with the pH value of solutions. Besides, the superhydrophobic property remains constant even after 144 h long-term UV radiation or 16 cycles of friction tests. The surface also exhibits superior self-cleaning resilience for organic contaminants of oleic acid, kerosene, lubricants, and vegetable oil by TiO2 photocatalysis degradation of pollution.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
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2017
·Vol. 14
·期 6
·1271-1278
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IF 1.557
Zhu Xiao Dong,Liu Yu,Li Zhao
The physical and mechanical properties of wood and wood-based panels can be effectively improved by modification with nanoparticles. This paper focuses on effects of modifying veneer with titanium dioxide (TiO 2 ) nanoparticles on the performance of a waterborne coating and formaldehyde emission. Commercial waterborne varnish was used to apply a surface finish on the modified veneered panels. Changes caused by TiO 2 nanoparticle treatment that could affect the finishing performance were measured. The results showed slight increases in the weight and contact angle of the veneers treated with TiO 2 nanoparticles, whereas the modified veneered panels after surface finishing presented improved hardness at high nanoparticle loadings. Modification of the veneers by nanoparticles had a minor negative influence on the coating glossiness and adhesion due to a blocking effect between the coating film and the modified veneers. Formaldehyde emissions were considerably reduced due to degradation by the TiO 2 particles under UV-light irritation.
研究领域:
木材科学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Yan Chen,Zhao Mo,Xingtong Zhu,Qingxiang Xu,Zhaoli Xue,Henan Li,Hui Xu,Long Zhao
Three triphenylamine (TPA) substituted dichromophoric zinc porphyrins XZP1–3 and a single zinc porphyrin ZP1 have been rationally designed to construct dye-sensitized TiO 2 nanoparticles to explore the feasibility of dichromophoric dye design for photocatalysis. TPA, N,N -diphenyl-(1,1′-biphenyl)− 4-amine and a carbazole-diphenylaniline derivative are attached to the meso -position of porphyrin core as the second chromophore. The electronic structure of the porphyrins is studied by density functional theory (DFT) calculations and the dye-sensitized composites are investigated using couples of spectral and electrochemical techniques . XZP2/TiO 2 exhibits the smallest charge transfer resistance and the longest electron lifetime among the investigated composites. The same catalyst performs the highest efficiency in photodegradation of both acid black (AB1) and tetracycline (TC) polluted water samples. Electronic paramagnetic resonance and radical quenching experiments reveal that the priority reactive species are superoxide radicals (•O 2 − ) and holes (h + ), suggesting the efficient charge separation at the porphyrin-sensitized TiO 2 interface. This work demonstrates the facilitated interfacial charge separation using dichromophoric dye-sensitized semiconductor particles for photodegradation and, the insights should aid in dyad design for photocatalysis application.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2021
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IF 3.515
Cheng Yuchuan,Zhao Zihui,Wang Hui,Hua Letian,Sun Aihua,Wang Jun,Li Zhixiang,Guo Jianjun,Xu Gaojie
Electrorheological (ER) fluids are a type of smart material with adjustable rheological properties. Generally, the high yield stress (>100 kPa) requires high electric field strength (>4 kV/mm). Herein, the TiO2 nanoparticles were synthesized via the sol–gel method. Interestingly, the ER fluid-based TiO2 nanoparticles give superior high yield stress of 144.0 kPa at only 2.5 kV/mm. By exploring the characteristic structure and dielectric property of TiO2 nanoparticles and ER fluid, the surface polar molecules on samples were assumed to play a crucial role for their giant electrorheological effect, while interfacial polarization was assumed to be dominated and induces large yield stress at the low electric field, which gives the advantage in low power consumption, sufficient shear stress, low leaking current, and security.
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2013
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IF 3.172
Huigao Wan,Na Wang,Jianmao Yang,Yinsong Si,Kun Chen,Bin Ding,Gang Sun,Mohamed El-Newehy,Salem S. Al-Deyab,Jianyong Yu
Hierarchically structured, superhydrophobic filter medium exhibiting robust filtration performance to airborne particulate were prepared by a facile deposition of electrospun polysulfone/titania nanoparticles (PSU/TiO 2 NPs) on a conventional nonwoven substrate. The air permeability, tensile strength and abrasion resistance of pristine PSU fibrous membranes could be finely controlled by regulating the solvent composition and number ratios of jets. By employing the TiO 2 NPs incorporation, the pristine PSU fibers were endowed with promising superhydrophobicity with a water contact angle of up to 152°. The quantitative hierarchical roughness analysis using N 2 adsorption method has confirmed the major contribution of TiO 2 NPs on enhancing the porous structure and surface fractal features with irregular rough structure. Filtration performance studies have revealed that the filtration efficiency and pressure drop of resultant hybrid membranes could be manipulated by tuning the surface composition as well as the hierarchical structures. Furthermore, the as-prepared PSU/TiO 2 -5 membrane exhibited improved filtration efficiency (99.997%) and pressure drop (45.3 Pa) compared with pristine PSU membrane, which would make them a promising media for fine particle filtration, and a new insight was also provided into the design and development of high performance filter medium based on hierarchical structured fibers.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
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IF 5.056
Jun-Ke Pi,Hao-Cheng Yang,Ling-Shu Wan,Jian Wu,Zhi-Kang Xu
TiO 2 nanoparticles have attracted much attention in the surface modification of polymer membranes for antifouling purpose due to their excellent hydrophilicity. In this work, a polydopamine/polyethyleneimine (PDA/PEI) intermediate layer was fabricated on the polypropylene microfiltration membrane via a co-deposition method and then TiO 2 nanoparticles (NPs) were modified on the membrane surfaces through a sol–gel process. TiO 2 -modified membranes with various Ti/C ratios were prepared and their surface structures and properties are compared with those of the nascent and PDA/PEI-deposited ones. Results indicate that the TiO 2 NPs modification increases both the surface wettability and the water permeation flux of the membranes remarkably. TiO 2 NPs also endow the membranes with promoted protein resistance properties. The relative flux reduction and flux recovery ratio are 31±3% and 82±5% for bovine serum albumin solution, while 26±4% and 86±3% for lysozyme solution. The TiO 2 NPs are also stable on the membrane surfaces under a wide range of pH value.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 37
·17801-17808
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IF 3.925
Shujin Ge,Shang Zhang,Xiujie Chang,Aixiang Li,Weiwei Wang,Qiuhong Li,Zhaodong Wang
We synthesized a novel surfactant, ferrocene azine (FcA), and developed a redox- and pH-responsive emulsion stabilized by TiO2 nanoparticles and oxidized ferrocene azine (Fc+A) with fluorescence through simple mixing instead of complex modification steps, where both Fc+A and TiO2 nanoparticles modified in situ by Fc+A adsorbed at the oil–water interface to synergistically stabilize emulsions. Based on the redox activity of ferrocenyl, the stability of the emulsion could be modulated. Moreover, the pH responsiveness of the emulsion was also endowed utilizing the generally ignored pH-controlled surface charge inversion of nanoparticles. This study proposes a synergistic stabilization interaction between surfactants and surfactant-modified nanoparticles with very low concentrations, which provides a new understanding for the stabilization mechanism of emulsions.
研究领域:
化学工程
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材料科学
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界面化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2017
·
IF 4.217
Caili Hou,Tifeng Jiao,Ruirui Xing,Yan Chen,Jingxin Zhou,Lexin Zhang
New poly(vinyl alcohol)/poly(acrylic acid)/carboxyl-functionalized graphene oxide nanocomposite membranes were prepared using electrospinning technique with thermal treatment and modified with TiO 2 nanoparticles. The thus prepared composite membranes are composed of polymeric nanofibers with carboxyl-functionalized graphene oxide sheets, which are anchored on the fibers by heat-induced crosslinking reaction. The preparation process of the designed nanocomposites is facile, eco-friendly, and controllable. The TiO 2 nanoparticles were deposited uniformly and homogeneously onto the surface of the obtained composite membranes. The as-prepared composite membranes demonstrate efficient photocatalytic capacity toward dye degradation, which is primarily due to the specific surface area of electrospun membranes and the photoactivity of TiO 2 nanoparticles. In addition, the composite membranes reported here are easy to regenerate. In comparison with other composite catalysts, the present preparation process is highly eco-friendly and facile to operate and regulate, which demonstrates potential large-scale applications in wastewater treatment and dye removal.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Qian Wei,Oluwasola Oribayo,Xianshe Feng,Garry L. Rempel,Qinmin Pan
Sponge-like superhydrophobic and superoleophilic materials are attracting significant attention for effective cleanup and recovery of spilled oils from water. We report on the synthesis of TiO2 nanoparticle/polyurethane (TPU) composite foam substrate and its surface modification with tetradecylamine (TDA)-amidated graphene oxide (GO-TDA), thereby forming superhydrophobic and superoleophilic TPU-GO-TDA sorbent for oil spill clean-ups. Spectroscopic analyses confirmed that TDA was successfully grafted onto GO and the reduced GO by TDA was successfully grafted onto the TPU foam. Sorption experiments with engine oil, crude oil, silicone oil, and chloroform demonstrated that the TPU-GO-TDA foam was an effective sorbent with sorption capacity of 20.2–62.4 times its own weight. The absorbed oils in the sorbent could be recovered simply by squeezing the oil-laden foam. The much higher selectivity to oils and better reusability of the TPU-GO-TDA foam than commercial sorbents make the TPU-GO-TDA foam promising for the separation and recovery of spilled oils and organic solvents from water.
研究领域:
材料科学
·
环境科学
✓ 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）