CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yaxuan Luo,Yanwei Wang,Yalong Liao,Ruo Qiang,Ye Yuan,Yu Ma,Xianxian Sun,Huibin Xu,Enshuang Zhang,Yibin Li
The substantial porosity and adaptability of ceramic aerogels render them promising for various applications. Nonetheless, the conventional compromise among volume density, mechanical properties and thermal stability constrains their applicability in specific contexts. In this study, we have developed and synthesized TiO 2 nanowire aerogels featuring a three-dimensional interlocking network structure. This design imparts the aerogels with exceptional characteristics, including ultra-lightness, high specific strength, and low thermal conductivity. The ceramic aerogels were synthesized through a straightforward hydrothermal reaction process. The resultant TiO 2 nanowire aerogels demonstrate exceptionally low volume densities, reaching values as low as 10 mg/cm 3 . They exhibit specific strengths up to 11 MPa/(g/cm 3 ) and possess remarkable thermal insulation properties, maintaining mechanical stability across a broad temperature range from −196 to 800 °C. Additionally, they feature an ultra-low thermal conductivity of 0.023 W/(m·K) in air. This study aims to advance the development of innovative designs for high-performance ceramic aerogels, thereby enhancing their applicability across various fields.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shushuang Sun,Rongsheng Chen,Ying Wen,Yang Li,Weiting Zhan,Feng Ma,Xingxin Jiang,Wenping He,Hongwei Ni
It is imperative to develop efficient and environmentally friendly technologies to remove ammonia nitrogen from the wastewater. Herein, RuO 2 nanoparticles decorated TiO 2 nanowires (RuO 2 /TiO 2 NWs) were fabricated for efficient electrocatalytic degradation of ammonia nitrogen. TiO 2 NWs were prepared on Ti mesh by hydrothermal treatment in NaOH solution, with diameter of 80–100 nm and length of ∼3 µm. Then RuO 2 nanoparticles were decorated on TiO 2 NWs by electrodeposition and annealing in air at 450 ℃. The effects of current, pH, initial ammonia concentration and chloride ion concentration on ammonia nitrogen degradation were investigated, and the possible degradation mechanism was discussed. After three hours of degradation in ammonia nitrogen waste liquid with NH 4 + -N concentration of 200 mg•L −1 and Cl - concentration of 2000 mg•L −1 , the ammonia nitrogen removal rate of RuO 2 /TiO 2 NWs reaches 99.876%. The mass loading of Ru is only 16.2 μg•cm −2 , suggesting an extremely high ammonia nitrogen degradation efficiency. Electrochemical test shows that the conductivity of RuO 2 /TiO 2 NWs is significantly enhanced as compared with that of TiO 2 NWs. RuO 2 /TiO 2 NWs also show good stability after 100 h of constant current test at 20 mA•cm −2 in ammonia nitrogen degradation. The prepared material can be used as an effective catalyst for the degradation of ammonia nitrogen in wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 23
·17871-17880
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IF 2.019
Xie Qian,Cheng Yonghong,Chen Siyu,Wu Guanglei,Wang Zhengdong,Jia Zirui
Epoxy based composites with reinforced dielectric properties were successfully synthesized by using TiO 2 nanowires as inorganic filler. TiO 2 nanoparticle/epoxy composites were also prepared as a contrast. TiO 2 nanowires were synthesized by a hydrothermal method, with an average diameter of 50 nm and a length of 5 µm. TiO 2 nanoparticles were purchased with average diameter of ~60 nm. Scanning electron microscopy images show that two types of fillers are both homogeneously dispersed in the matrix. Although the specific surface area of TiO 2 nanoparticles is about twice of that of TiO 2 nanowires, remarkable improved dielectric constant, enhanced electrical and thermal conductivity, higher space charge accumulation and stronger charge carrier mobility were observed in nanowire filled epoxy resin at the same filler content. Meanwhile, nanowires composites exhibit excellent glass transition temperature and thermal stability. These results indicated that the geometry of filler had a profound impact on the performance of epoxy composites, and nanowire filling is more effective than nanoparticle filling to enhance the properties of epoxy resin.
研究领域:
材料科学
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复合材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Shuping Liu,Xiaoshu Qu
This paper shows a nanocomposite film of Dawson-type polyoxometalate (POM) K 6 P 2 W 18 O 62 (P 2 W 18 ) and TiO 2 nanowires by combining hydrothermal and Layer-by-Layer (LbL) assembly methods The electrochemical and electrochromic (EC) performances were examined and compared with P 2 W 18 and TiO 2 composite film as well as individual P 2 W 18 and TiO 2 structures. The nanocomposite film exhibits improved EC properties with high transmittance modulation (45.1% at 650 nm), fast switching times (1.9 s and 6.7 s) and outstanding coloration efficiency (69.0 cm 2 /C at 650 nm). The enhancement can be attributed to the contribution from P 2 W 18 and TiO 2 , which displays large real active area and increase the capabilities for EC material.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2024
·Vol. 155
·期 1
·1-10
·
IF 2.3
Wang Shipeng,Sang Longrun,Zhang Feiyan,Li Yongcheng,Xu Benhua,Zhang Peng,Liu Bingxin,Wang Yunsi
Enhancing the performance of ruthenium (Ru)-based electrocatalysts for the alkaline hydrogen evolution reaction (HER) presents a significant challenge. Herein, titanium dioxide nanowire arrays decorated with ruthenium clusters were grown on carbon cloth (Ru-TiO 2 NWAs/CC) via a two-step hydrothermal method. The nanowire array structure increases the surface area of the substrate, allowing for more Ru clusters to be decorated, thereby improving catalytic activity. The resulting Ru 3 –TiO 2 NWAs/CC catalyst exhibits prominent HER performance in 1.0 M KOH with overpotentials of 61 at 10 mA cm −2 and a Tafel slope of only 47.4 mV dec −1 . Furthermore, it maintains outstanding stability under alkaline conditions for more than 10 h. The Ru clusters decoration enhances the TiO 2 /CC kinetic, more active sites were exposed on nanowires of the surface and accelerated electron transport, thus reducing the charge transfer barrier. After the electrochemical test, the morphology and structure of Ru 3 –TiO 2 /CC remained largely unchanged, and the valence states of the elements remained stable. This work paves the road to exploiting highly active and cost-efficient electrocatalysts for alkaline hydrogen evolution. Graphical
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Nuoxin Xu,Xingrong Xiao,Hui Yang,Enjie Yu,Qilong Zhang
In this study, TiO 2 nanowires with various aspect ratios were prepared via a precursor-controlled hydrothermal process. Ternary composite films comprised of P(VDF-HFP) polymer, Ag particles and the as-synthesized TiO 2 nanowires were then fabricated. The results reveal that TiO 2 NWs with high aspect ratios (i.e., pa-TiO 2 ) exhibit superiority in enhancing the dielectric constants of composites in comparison with their low-aspect-ratio counterparts (i.e., pr-TiO 2 ). For instance, the dielectric constant of the Ag/pa-TiO 2 /P(VDF-HFP) composite with 30 vol% TiO 2 NWs reaches 33.4 at 100 Hz, which is 42.1% larger than that of Ag/pr-TiO 2 /P(VDF-HFP) sample and 227% higher than pristine P(VDF-HFP). In addition, TiO 2 nanowires also serve as physical obstacles to avoid aggregation of Ag particles. As a consequence, the ternary composites filled with high-aspect-ratio TiO 2 NWs exhibit suppressed dielectric losses (e.g., 0.023 at 100 Hz) and low conductivities, making them promising candidates for applications in integrated capacitors and energy storage devices.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 13
·4291
·
IF 4.927
Yu Fu,Yanyan Yang,Dongxue Chu,Zefeng Liu,Lili Zhou,Xiaoyang Yu,Xiaoshu Qu
Polyoxometalates (POMs) demonstrate potential for application in the development of integrated smart energy devices based on bifunctional electrochromic (EC) optical modulation and electrochemical energy storage. Herein, a nanocomposite thin film composed of a vanadium-substituted Dawson-type POM, i.e., K7[P2W17VO62]·18H2O, and TiO2nanowires were constructed via the combination of hydrothermal and layer-by-layer self-assembly methods. Through scanning electron microscopy and energy-dispersive spectroscopy characterisations, it was found that the TiO2nanowire substrate acts as a skeleton to adsorb POM nanoparticles, thereby avoiding the aggregation or stacking of POM particles. The unique three-dimensional core−shell structures of these nanocomposites with high specific surface areas increases the number of active sites during the reaction process and shortens the ion diffusion pathway, thereby improving the electrochemical activities and electrical conductivities. Compared with pure POM thin films, the composite films showed improved EC properties with a significant optical contrast (38.32% at 580 nm), a short response time (1.65 and 1.64 s for colouring and bleaching, respectively), an excellent colouration efficiency (116.5 cm2C−1), and satisfactory energy-storage properties (volumetric capacitance = 297.1 F cm−3at 0.2 mA cm−2). Finally, a solid-state electrochromic energy-storage (EES) device was fabricated using the composite film as the cathode. After charging, the constructed device was able to light up a single light-emitting diode for 20 s. These results highlight the promising features of POM-based EES devices and demonstrate their potential for use in a wide range of applications, such as smart windows, military camouflage, sensors, and intelligent systems.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
SCRIPTA MATERIALIA
·
2021
·
IF 5.611
Yuqing Cai,Zhongyuan Yan,Shumin Shi,Lida Zhang,Ting Zhang,Mingtong Yang,Ling Bai,Hui Fu,Xu-Sheng Yang,Ziquan Li,Zhen-Dong Huang
Lithium-sulfur battery (LSB) is one of the most promising battery systems for green energy plants and electric vehicle power sources. A high-performance sulfur reservoir is one of the most critical components for LSBs to protect the soluble lithium polysulfides (LPSs) from shuttling to lithium anode. Herein, titanium oxide nanowire clots (TOCs) with a two-phase composition and high effective absorption surface area (270.1 m 2 g −1 ) are designed as promising reservoirs to accommodate sulfur and LPSs. The synergistic effects generated from the unique structure of TOCs make the obtained S/TOCs cathode materials exhibit high specific capacity, high coulombic efficiency, and excellent cyclic stability at 1C and 2C rates. The corresponding capacity fading rates per cycle are around 0.14% and 0.11 % for the LSBs being (dis)charged 1C and 2C, respectively.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Xian-Na Wang,Bin Li
Surface-assisted laser desorption/ionization mass spectrometry (SALDI MS) has been successfully applied in the analysis of various small molecules. In this work, gold nanoparticles/thiol-β-cyclodextrin-functionalized TiO2 nanowires (AuNPs/SH-β-CD-TiO2 NWs) were prepared to enhance the performance of SALDI MS and mass spectrometry imaging (MSI). A monolithic TiO2 film was first grown on an indium tin oxide (ITO) glass slide via a modified sol–gel method and treated in an alkaline environment to form nanowires. TiO2 NWs were chemically modified by SH-β-CD for immobilizing AuNPs densely and strongly. Compared with the conventional organic matrix 2,5-dihydroxybenzoic acid (DHB), the prepared AuNPs/SH-β-CD-TiO2 NWs showed superior performances on detection sensitivity, repeatability, and analyte coverage. Analytes typically detectable with negative-ion matrix-assisted laser desorption/ionization (MALDI) MS could also be observed using AuNPs/SH-β-CD-TiO2 NWs in the positive ion mode. Its successful usage efficiently enhanced the SALDI MS detection of various small molecules such as carbohydrates, fatty acids, and bile acids in the positive ion mode. The developed SALDI substrate was further used to characterize and discriminate the natural and in vitro cultured Calculus Bovis, as well as natural and artificial Moschus. Furthermore, the spatial distribution of several natural products in spearmint leaves and potato tubers was explored by tissue imprinting and deposition on the AuNPs/SH-β-CD-TiO2 NW surface for SALDI MSI in dual-polarity mode, respectively. The wide application and satisfied detection sensitivity make AuNPs/SH-β-CD-TiO2 NWs ideal for SALDI MS and MSI of various natural products.
研究领域:
分析化学
·
质谱技术
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Thabang Mokoba,Junfeng Lu,Tian C. Zhang,Like Ouyang,Shaojun Yuan
Frequent occurrences of accidental oil spills, chemical leakages and oily water discharge make the development of effective and efficient methods for spilled oil and organic pollutants clean-ups extremely critical and urgent. Here, a novel superhydrophobic octadecanethiol-TiO 2 nanowires-polydopamine nanocomposites-modified polyurethane sponge was fabricated by a facile and cost-effective synthesis process, wherein, self-polymerization of dopamine was coated on the polyurethane skeleton structure, followed by direct incorporation of TiO 2 nanowires to enhance surface roughness and lastly, surface coating with the low surface energy octadecanethiol molecules. The resultant PU-PDA-TiO 2 -ODT sponge showed superhydrophobic and superoleophilic with the water contact angle (WCA) of 154.0 ± 2° and the oil contact angle of 0°, as well as self-cleaning and anti-fouling capabilities. The as-fabricated sponge demonstrated high oil adsorption capacity for a broad variety of oils and organic solvents , also exhibiting good reusability of more than 30 cycles without diminishing adsorption performance. The potential for practical applications was demonstrated through gravity-driven and vacuum assisted continuous separations, yielding more than 99.9% oil purity. Moreover, the as-prepared sponge exhibited superior mechanical strength through exceptional performance in compression, ultrasonication and frictions tests, and consistent superhydrophobicity in harsh environments including exposure to pH, temperature and NaCl concentration variations. Thus, the novel superhydrophobic and superoleophilic sponge has great potential for practical application in oil-water separations.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2014
·Vol. 161
·期 5
·H265
·
IF 2.859
Juangang Wang,Dongsheng Bai
In this work, we made network TiO2 nanowires of high surface area, using the seeded growth process. An overall solar photoconversion efficiency of 8.51% has been achieved from the film including TiO2 network nanowires, which is much higher than 6.94% of TiO2 nanoparticulate film with same thickness (6.2 μm).
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Tao Wang,Xueying Jia,Chang Lv,Lvlv Ji,Yujie Wei,Zhicheng Zhang,Yinhu Gao,Sheng Wang
The development of three-dimensional (3D) micro-/nanostructures with multiscale hierarchy offers new potential for the improvement of the pristine textile properties. In this work, a polyester fabric coated with 3D hierarchically structured rutile TiO2 nanowires (THNWP) was fabricated by a facile hydrothermal strategy. The THNWP samples exhibit markedly improved photocatalytic activities and antibacterial properties owing to their 3D hierarchical architecture constructed by one-dimensional nanowire structures, good crystallinity, excellent light-harvesting capability, and fast electron-transfer rate. Furthermore, the unique 3D hierarchical nanostructures also combine with the monofilament to produce ternary-scale hierarchy, which endows the fabric surface with outstanding superamphiphobicity after further facile fluorination treatment. The supportive air-pockets trapped within the unique ternary-scale architectures are proved to be the crucial factor in the achievement of high liquid repellency, and the highest performing superamphiphobic surface is capable of repelling liquids down to a minimal surface tension of 23.4 mN m–1. We envision that our findings may possess great potential in the bottom-up design of high-performance textiles.
研究领域:
材料科学
·
纺织工程
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）