Micro & Nano Letters
·
2018
·Vol. 13
·期 10
·1382-1385
·
IF 0.841
Xin Xiao,YiHui Wang,DongEn Zhang,JunYan Gong,Ying Zhang,JuanJuan Ma,Tao Yang,ZhiWei Tong
Highly uniform columnar-shaped CeO 2 was successfully prepared in large quantities by calcining a precursor, which was prepared by a simple hydrothermal method. The structure and morphology of the precursor and the columnar CeO 2 were characterised by X-ray diffraction and scanning electron microscopy. The columnar CeO 2 was fixed on a glassy carbon electrode to obtain a columnar CeO 2 sensor for detection of phenol. The anodic peak current was proportional to the phenol concentration in the range of 0.005–0.225 mmol l −1 ( R = 0.995) and 0.225–1.125 mmol l −1 ( R = 0.998) with the detection limit of 0.9 μmol l −1 . This electrochemical method has the advantages of simplicity and ease of fabrication, rapid detection, low cost of the apparatus and wide dynamic ranges.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Y. Lu,S. Khan,C.L. Song,K.K. Wang,G.Z. Yuan,W. Li,G.R. Han,Y. Liu
The column-structured Nb-doped TiO 2 (TNO) films with various Nb concentrations in the range between 0 and 10 at.% have been prepared by a sol–gel method. The phase compositions, element concentrations, microstructures, and optical-electron properties have been characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, electron microscopy , and UV/Vis/Near-IR spectrophotometer. The experimental results show that all of the samples prepared in the present work exhibit column-structured morphology and Nb doping concentration has a non-monotonic effect upon the microstructure. The relatively low conductivity and high transmittance of the samples demonstrate that column-structured microstructures greatly improve the optical and electronic properties of TNO films. The favorable sample with 10 at.% Nb doping concentration exhibits a resistance of about 2.27 Ω cm and transmittance of approximately 68.78% with 85 nm thickness.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Nano
·
2017
·
IF 13.942
Jianmin Luo,Wenkui Zhang,Huadong Yuan,Chengbin Jin,Liyuan Zhang,Hui Huang,Chu Liang,Yang Xia,Jun Zhang,Yongping Gan,Xinyong Tao
Two-dimensional transition-metal carbide materials (termed MXene) have attracted huge attention in the field of electrochemical energy storage due to their excellent electrical conductivity, high volumetric capacity, etc. Herein, with inspiration from the interesting structure of pillared interlayered clays, we attempt to fabricate pillared Ti3C2 MXene (CTAB–Sn(IV)@Ti3C2) via a facile liquid-phase cetyltrimethylammonium bromide (CTAB) prepillaring and Sn4+ pillaring method. The interlayer spacing of Ti3C2 MXene can be controlled according to the size of the intercalated prepillaring agent (cationic surfactant) and can reach 2.708 nm with 177% increase compared with the original spacing of 0.977 nm, which is currently the maximum value according to our knowledge. Because of the pillar effect, the assembled LIC exhibits a superior energy density of 239.50 Wh kg–1 based on the weight of CTAB–Sn(IV)@Ti3C2 even under higher power density of 10.8 kW kg–1. When CTAB–Sn(IV)@Ti3C2 anode couples with commercial AC cathode, LIC reveals higher energy density and power density compared with conventional MXene materials.
研究领域:
材料科学
·
电化学储能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Jiang-Tao Liu,Yu-Chen Zheng,Xin Hou,Xue-Rong Feng,Ke Jiang,Ming Wang
The recycling of waste masks (melt-blown polypropylene nonwoven fabrics) generated during the COVID-19 outbreak has now become a social issue of high priority. Converting these waste masks into electromagnetic wave (EMW) absorbers is one of the most cost-effective and high-value-added methods. In this study, we successfully converted household masks into magnetic metal doping carbon micro-particles with columnar structure to achieve excellent microwave absorption properties through sulfuric acid modification and doping magnetic metal. Specifically, the cobalt-doped carbon columnar micro-particles have a minimum reflection loss (RL min ) of −52.8 dB at 7.0 GHz (d = 3 mm) and an effective absorption bandwidth (EAB) of 4.6 GHz (d = 1.4 mm). The nickel/carbon hybrid materials have an RL min of −26.2 dB at 8.8 GHz (d = 3 mm) and an EAB of 5.3 GHz (d = 2.4 mm). The multiple reflection or scattering of EMWs, conduction and magnetic losses, dipolar polarization, and interfacial polarization effects can be enhanced in those magnetic metal doping carbon micro-particles with columnar structure, which leads to the excellent microwave absorption performance.
研究领域:
材料科学
·
环境科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 6
·2597-2612
·
IF 9.6
Wang Chun-Fang,Zhang Shi-Wei,Huang Lan,Zhu Yuan-Min,Liu Feng,Wang Jian-Chuan,Tan Li-Ming,Zhi Chun-Yi,Han Cui-Ping
Calcium-ion batteries (CIBs) have generated intense interest due to the growing demand for safer, cheaper, and large-scale energy storage systems. However, their development is still in its infancy, owing to the lack of suitable cathodes for sustaining reversible Ca 2+ intercalation/deintercalation. Herein, layered H 2 V 3 O 8 (HVO) with Zn 2+ pre-insertion (ZHVO) is reported as a high-rate and highly durable cathode material for CIBs. The existence of Zn 2+ and H 2 O pillars could expand the interlayer spacing up to 1.8 nm, which is favorable for the diffusion of bulky Ca 2+ . The formation of Zn–O bonds facilitates electron transfer and enhances electrical conduction. Consequently, the ZHVO cathode achieves superior capacity performance (213.9 mAh·g −1 at 0.2 A·g −1 ) and long lifespan (78.3% for 1,000 cycles at 5 A·g −1 ) compared to pristine HVO. Density functional theory (DFT) calculations revealed that Zn 2+ moved during Ca 2+ intercalation, thereby reducing the diffusion energy barrier and facilitating Ca 2+ diffusion. Finally, a safe aqueous calcium ion cell was successfully assembled. Graphical abstract
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Jie Zhang,Xiangcheng Li,Wei Gong,Pingan Chen,Boquan Zhu
Columnar β-Sialon bonding phases were in situ synthesised in Al 2 O 3 -C refractory composites and their growth mechanism was simulated based on first-principles calculations. The experimental results indicated that the addition of Fe 2 O 3 as a catalyst accelerated the transformation of Si 3 N 4 to β-Sialon, resulting in a well-developed columnar structure. The (100) facet was the primary surface for crystal growth during the transformation process of Si 3 N 4 into β-Sialon. According to first-principles calculations, the surface energy of the (100) facet decreased greatly due to the substitution of (Si, N) pairs with (Al, O). The catalyst could promote the adsorption of gaseous phases on the (100) facet of Si 3 N 4 and decreased the gas adsorption energy of both SiO and Al 2 O. Owing to the presence of in situ synthesised columnar β-Sialon bonding phases, the residual crushing strength of Al 2 O 3 -C refractory composites after 5 thermal shock cycles increased by 25.1%.
研究领域:
材料科学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2021
·
IF 3.315
Yanhua Gao,Wenli Zhao,Dongfeng Zhang
In this paper, the growth mechanism of prismatic carbon nitride at different temperatures was studied by using the mixed solution of CTAB and NaOH by thermal polycondensation-hydrothermal method, and a series of characterization methods were used to analyze and verify. The pollutant model MO solution was degraded and its photocatalytic activity was investigated under light. The results show that at a relatively low temperature, g-C 3 N 4 is a rod-like structure, and NaOH plays a major role. With the increase of temperature, CTAB plays a major role and can transport the primitives to form a rod, but also forms an ordered hydrophobic film on the crystal plane, which inhibits the growth of the rod-like structure on the (100) crystal plane and controls the extension on the (002) crystal plane. Its degradation rate is about 2.64 times that of pure g-C 3 N 4 . This significantly improves the separation rate of photogenerated electrons and the photocatalytic degradation efficiency.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2013
·Vol. 68
·期 1
·121-127
·
IF 1.66
Song Chen-lu,Wang Ju,Zeng Meng-long,Zhu Jian-qiang,Liu Yong,Xu Gang,Han Gao-rong
Fluorine-doped TiO 2 thin films featuring columnar structure were prepared on fluorine-doped tin oxide (SnO 2 :F) substrate using a sol–gel method. The F doping ratios were varied in the range of 0–8 %. The effect of [F]/[Ti + F] ratio on the structural, morphological, optical, photocatalytic and low-emissivity properties has been investigated in detail. X-ray diffraction studies revealed that all the composited films are mainly composed of anatase TiO 2 and rutile SnO 2 without other phases. The prepared TiO 2 :F films possessed the columnar morphology with the single layer thickness ranging from 28 to 31 nm. The best photocatalytic activity was obtained for the films with 4 % F doping ratio which is mainly attributed to the highest crystallization and crystallite size. The transmission and hemispherical emissivity of the composite films could still reach approximately 70 % and 0.20, which match the requirements of the Chinese National Standard (GB/T18915.2-2002), promoting the films for the practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Hao Li,Yujie Peng,Sirong Yu,Xiaoli Yin
In this paper, both slender pillars and hierarchical structures on steel substrate including slender pillar ZnO structures on Zn coating, flower-like CuO structures on Cu coating and dandelion-like CuO structures on Cu-Zn coating were obtained. After low-energy modification, contact angles of these three coatings are 157.59°, 160.69° and 157.94°, respectively, and slide angles of them are ~6°, ~3° and ~3°, respectively. Based on classical Wenzel and Cassie theories, by fabricating microstructure models, we theoretically prove that both slender pillars and hierarchical structures can achieve superhydrophobicity. Furthermore, we systematically study the stability of these three superhydrophobic coatings with slender pillars or hierarchical structures using different methods and compare their applications in the field of self-cleaning, oleophobicity, anti-corrosion, and anti-scaling. We discover that these three superhydrophobic coatings with slender pillars or hierarchical structures all show excellent stability and self-cleaning property. The slender pillared superhydrophobic Zn coating presents excellent superhydrophobic property after sandpaper abrasion compared with hierarchical structured superhydrophobic Cu and Cu-Zn coatings. Whereas, the hierarchical structured superhydrophobic Cu coating with flower-like structures shows the best oleophobicity and anti-corrosion property, as well as the hierarchical structured superhydrophobic Cu-Zn coating with dandelion-like structures promises good anti-scaling property.
研究领域:
材料科学
·
表面工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Shao-rong Bie,Bao-wei Zhao,Ding-shun She,Zhi-qiang Fu,Jia-jie Kang,Xiao-yong Ren
To investigate the hardening mechanisms of CrN-based hard coatings, transmission electron microscopy (TEM) was employed to correlate nanoindentation-induced deformation with microstructural evolution. Among the investigated coatings, CrAlN exhibits the highest hardness and Young's modulus (41.2 GPa/402.8 GPa), outperforming CrSiN (30.5 GPa/336.2 GPa) and CrN (26.7 GPa/305.7 GPa). The superior performance of the CrAlN is attributed to a coordinated deformation mechanism involving ∼9° deflection of columnar grains under compression loading, which facilitates stress redistribution while maintaining structural continuity. Additionally, stress-induced phase transformations at acute-angle grain boundaries—from FCC CrAlN to HCP Cr 2 N and FCC AlN—further enhance strain accommodation, contributing to an improved strength-toughness balance. In contrast, CrSiN coating develops internal crack formation accompanied by Cr 2 N phases. While these transformations increased hardness, they also introduced embrittlement, compromising ductility. The CrN coating, lacking both solid-solution strengthening and grain refinement, displayed extensive trans-granular fracture and grain disintegration, indicative of limited capacity for stress delocalization. These findings provide mechanistic insights into the structure–property relationships of CrN-based coatings and offer design guidelines for the development of advanced wear-resistant coatings with tailored mechanical responses.
研究领域:
材料科学
·
表面工程
·
薄膜材料
·
力学性能
·
微观结构表征
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 9
·1570
·
IF 5.3
Weixuan Li,You Chen,Zhibin Jiao
Today, in the fields of optical precision instruments, medical devices, and automotive engineering, the demand for anti-reflection and anti-fog surfaces is growing rapidly. However, the anti-fog function often compromises the efficiency of the anti-reflection function. Therefore, optical precision instruments are always restricted by the inability to combine high anti-reflection efficiency and excellent anti-fog performance into one material. In addition, the synergistic mechanism of harmonizing anti-fogging and anti-reflection is currently unclear, which has a negative impact on the development and optimization of multifunctional surfaces. Herein, bio-inspired anti-fogging and anti-reflection surfaces (BFRSs) possessing multiscale hierarchical columnar structures (MHCS) were obtained using a brief and effective preparation technique, combining the biotemplating method and sol-gel method. Specifically, condensed fog droplets distributed on the BFRS can be absolutely removed within 6 s. In addition, the BFRSs endow the glass substrate with a relatively higher reflectance (17%) than flat glass surfaces (41%). Furthermore, we demonstrated the synergistic mechanism of the anti-fogging and anti-reflection functions of BFRSs. On the one hand, the high transparency benefits from the multiple refraction and scattering of light in the MHCS array. On the other hand, the excellent anti-fogging performance is attributed to the imbalance of the capillary force of the MHCS acting on the liquid film. The explanation for these two mechanisms provides more possibilities for the subsequent preparation of multifunctional surfaces. At the same time, the bionic research concept provides new solutions for the researcher to conquer the combination of high transmission and anti-fog properties for precision optical surfaces.Keywords:bio-inspired hierarchically-architectured surfaces;multiscale columnar structures;anti-fog;anti-reflection;synergistic mechanism of anti-fogging and anti-reflection
研究领域:
材料科学
·
光学工程
·
生物仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）