MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2022
·
IF 0.672
Limin Wu,Jinming Chu,Fei Wang,Wei Liu,Yongmin Guo,Yi Li,Baozong Li,Yonggang Yang
A series of azobenzene liquid crystals containing one amino acid residue were synthesized. They exhibit smectic mesophases. The compounds derived from alanine can self-assemble into twisted nanoribbons. The molecules organized in a monolayer structure within the nanoribbon. Circular dichroism characterization indicated that the neighboring liquid crystal cores packed in a chiral structure. FT-IR spectra indicated that the nanoribbons were caused by H-bonding and association of hydrocarbon chains.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 5
·392
·
IF 4.3
Di Wu,Tianrong Yi,Yutao Hu,Jianxiong Xie,Yu Deng,Junqi He,Yuting Sun,Jidong Liu,Qiaoyan Hao,Wenjing Zhang
The morphology modulation of target crystals is important for understanding their growth mechanisms and potential applications. Herein, we report a convenient method for modulating the morphology of MoO2by controlling different growth temperatures. With an increase in growth temperature, the morphology of MoO2changes from a nanoribbon to a nanoflake. Various characterization methods, including optical microscopy, atomic force microscopy, (vertical and tilted) scanning electron microscopy, Raman spectroscopy, high-resolution transmission electron microscopy, and selected area electron diffraction, were performed to unveil the morphology modulation and lattice structure of MoO2. Both MoO2nanoribbons and nanoflakes display a standing-up growth mode on c-sapphire substrates, and their basal planes are MoO2(100). Further investigations into devices based on MoS2with Au/Ti/MoO2electrodes show the potential applications of MoO2in two-dimensional electrodes. These findings are helpful for the synthesis of MoO2with different morphologies and applications in the field of optoelectronic nanodevices.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2020
·Vol. 5
·期 1
·430-437
·
IF 6.788
Mengyu Hong,Jingjing Meng,Huihui Yu,Junli Du,Yang Ou,Qingliang Liao,Zhuo Kang,Zheng Zhang,Yue Zhang
Zinc oxide (ZnO) has been widely considered as a promising candidate in electro-chemical devices due to the high electrical transport performance and easy-fabrication. However, the active chemical properties of ZnO nanobelts restrict their application in practical electro-chemical devices. Here, we adopted an indium doping strategy to improve the corrosion resistance of ZnO nanobelts. Compared with other atomic doping methods, the indium doping method not only formed several layers of indium atoms in the body of ZnO nanobelts but also created a ZnxIn1−xO passivated layer on the ZnO nanobelt surface. After doping indium atoms into ZnO nanobelts, the self-corrosion potential increased and the self-corrosion current decreased which greatly reduced its corrosion rate in the electrochemical solution. Furthermore, the electrical transport properties of indium-doped zinc oxide (In–ZnO) nanobelts presented ultrahigh stability even after being soaked in the electrochemical solution for 43 hours. The enhanced anticorrosive quasi-2D ZnO nanobelts offer a promising development of ZnO-based electro-chemical devices.
研究领域:
材料科学
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 5
·1126-1132
·
IF 5.106
Congjie Lv,Yi Peng,Jing Yang,Xiaochuan Duan,Jianmin Ma,Taihong Wang
Nb-Doped LiNi0.4Co0.2Mn0.4O2 (Nb-NCM) nanobelts have been successfully fabricated for the first time through a facile electrospinning method by the delicate control of PAN pyrolysis and Nb-NCM formation (including nucleation and subsequent growth processes). According to the experimental evidence from temperature-dependent characterization and isolation of the intermediates, the formation of nanobelts undergoes a morphology evolution from nanofibres to nanotubes, and finally to the nanobelts composed of subunit nanoparticles. When used as a cathode for lithium-ion batteries, the as-electrospun Nb-NCM nanobelts exhibit superior electrochemical performances, which could be attributed to their unique features, such as their 1D nanostructure, well-crystallized nature and Nb-doping. These features can improve the ionic conductivity of Nb-NCM nanobelts and stabilize the electrode/electrolyte interface. Therefore, the 1D Nb-NCM nanobelts developed in this study not only provide an excellent model to investigate the fabrication of multi-element oxides using the electrospinning method, but also open up a facile route for designing 1D layered cathodes with a complex component for high performance lithium-ion batteries.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源存储
·
无机合成
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qing Sun,Meilin Ke,Yingjie Zhao,Bin Wang,Jian Zhang,Jiawei Sheng
Improving the ability of photocatalysts to capture and degrade dye pollutants is essential for the development of photocatalytic technology. Herein, a Bi 2 MoO 6 belt-like morphology with significantly enhanced visible light photocatalytic performance was obtained by solvent hydrothermal combining ethanol heat treatment technique. The Raman, FTIR, TEM, ESR, EIS and PL results demonstrate that the formation of defects on the {0 0 1} facet of BMO can effectively promote charge separation and prolong the life of optical carriers. The photocatalytic performance is evaluated by monitoring different concentrations RhB removal from aqueous solution and the results showed that defective Bi 2 MoO 6 nanobelts displayed 39 times and 60 times degradation rate than that of comparative conventional Bi 2 MoO 6 nanosheets and P25, respectively. In combination of controllable preparation process, excellent adsorption capacity and highly enhanced photocatalytic performance, this newly defective Bi 2 MoO 6 nanobelt might be a promising candidate for degradation of organic dyes in wastewater.
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
ChemElectroChem
·
2017
·Vol. 5
·期 2
·322-327
·
IF 4.136
Kai Song,Fengmei Gao,Weiyou Yang,Enyan Wang,Zhenxia Wang,Huilin Hou
Graphical Time to split : The efficient photoelectrocatalysis of WO 3 mesoporous nanobelts is explored, demonstrating enhanced photoelectrochemical activity for water splitting. In the present work, we reported the exploration of photoanodes based on mesoporous WO 3 nanobelts through a foaming-assisted electrospinning strategy. The introduced polyvinylpyrrolidone in the raw solutions played a determining role on the formation of the nanobelts, enabling their fabrication in a controlled manner. The as-fabricated mesoporous WO 3 nanobelts exhibited a photocurrent density of 311 μA cm −2 and incident photon-to-current efficiency of 6.5 % at 350 nm and 1.2 V vs. Ag/AgCl under simulated sunlight illumination, which are 2.3 times to that of cylindrical nanofibers. Furthermore, our discovery confirmed that, in comparison to the conventionally cylindrical nanofibers, the nanobelts with a rectangular cross section could be a better candidate for constructing photoanodes with enhanced photoelectrochemical efficiency and stability.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Dengfeng Yan,Shengpeng Mo,Yuhai Sun,Quanming Ren,Zhentao Feng,Peirong Chen,Junliang Wu,Mingli Fu,Daiqi Ye
Herein, CeO 2 catalysts with nanotube , nanobelt, and wire-in-nanotube morphologies were successfully fabricated by a facile single spinneret electrospinning technique. And catalytic activity of these electrospun CeO 2 nanomaterials were evaluated by toluene catalytic combustion reaction. Among the three morphologies of CeO 2 catalysts, CeO 2 nanobelt (CeO 2 -NB) presented the best toluene catalytic combustion performance (T 90% = 230 °C) at WHSV = 60,000 mL g −1 h −1 , also exhibited the lowest activation energy (E a = 80.2 kJ/mol). Based on the characterization by TEM , XRD, BET, SEM, XPS, Raman spectroscopy , H 2 -TPR, and O 2 -TPD results, the high catalytic activity of CeO 2 -NB catalyst was attributed to its porous nanobelt morphology with larger specific surface area and the abundance of surface oxygen vacancies. Furthermore, the CeO 2 -NB catalysts presented an excellent durability by longtime on-stream test (as well as presence of 5% vol. water vapor), suggesting its great potential for practical air pollution control application.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POWDER DIFFRACTION
·
2020
·Vol. 35
·期 4
·276-281
·
IF 0.919
Shengru Wang,Xiaofang Lai,Bingsheng Du,Junhao Ma,Peihua Wang,Jikang Jian
In this work, SnS1−xSex ternary nanobelts were synthesized by a facile hydrothermal method without the assistance of surfactants. The structure, morphology, microstructure, compositions, chemical valences, phonon modes, and optical band gaps of the SnS1−xSex nanobelts were characterized in detail. The results indicate that the SnS1−xSex nanobelts have uniform one-dimensional morphology and are single crystals with high crystallinity. Se is incorporated into the SnS lattice to substitute for S-forming ternary SnS1−xSex alloy. With the increase of Se doping concentration, the optical band gaps of the nanobelts gradually decrease from 1.15 to 1.01 eV, confirming the tunable optical property achieved here.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2019
·
IF 3.176
Zunlan Hu,Wenlong Huo,Tianbin Zhu,Jian Liu,Zhipeng Xie
In this paper, a new nanomaterial , α-Si 3 N 4 nanobelts assembled by high density nanorods were prepared via the crystallization of amorphous Si 3 N 4 at 1450 °C for 12 h. The as-synthesized nanobelts exhibited a width of ∼900 nm and a thickness of ∼150 nm, and a depressed linear region in the central. α-Si 3 N 4 nanorods on the nanobelts had a width of 8–16 nm and a length of 400–450 nm. The nanorods were single-crystal, growing along (101) plane. The nanobelt appeared to be initiated by α-Si 3 N 4 nanorods constantly growing on the both sides of a nanowire which was caused by secondary nucleation and the growth of Si 3 N 4 microcrystals . Growth mechanism related to the formation of the nanobelts was analyzed in detail on the basis of vapor-solid mechanism and secondary nucleation. The current work would provide new insights into α-Si 3 N 4 nanobelts assembled by nanorods which play an important role in nanoscale devices and show widespread potential applications due to their special morphology.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 42
·36180-36191
·
IF 3.289
Jiao Tian,Qianli Ma,Xiangting Dong,Wensheng Yu,Ming Yang,Ying Yang,Jinxian Wang,Guixia Liu
A novel nanostructure of {[Eu(BA)3phen + Tb(BA)3phen]/PMMA}//[PANI/Fe3O4/PMMA] Janus nanoribbons with tunable luminescent–electrical–magnetic performance has been successfully fabricated by electrospinning technology using a specially designed parallel spinneret. The morphology and properties of the final products were investigated in detail by X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectrometry (EDS), biological microscopy (BM), thermogravimetric analysis (TG), a Hall effect measurement system, vibrating sample magnetometry (VSM) and fluorescence spectroscopy. The results reveal that the Janus nanoribbons simultaneously possess excellent luminescent performance, electrical conduction and magnetic properties due to the peculiar nanostructure of Janus nanoribbons. The luminescent–electrical–magnetic trifunctional Janus nanoribbons possess better performances than their counterpart [Eu(BA)3phen + Tb(BA)3phen]/Fe3O4/PANI/PMMA composite nanoribbons which exhibit very weak excitation and emission spectra. The fluorescence intensity of Janus nanoribbons is ca. 70 times higher than that of composite nanoribbons. The color, luminescent intensity, electrical conductivity and magnetic property of the Janus nanoribbons can be tuned by adjusting different amounts of rare earth complexes, PANI and Fe3O4 NPs, respectively. The obtained Janus nanoribbons have potential applications in molecular electronics, microwave absorption and display devices owing to their excellent trifunctionality. Moreover, the construction technique for the Janus nanoribbons is of universal significance for the fabrication of other multifunctional Janus nanoribbons.
研究领域:
材料科学
·
光学
·
电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Zhihua Cheng,Jian Gao,Qiang Fu,Changxia Li,Xiaopeng Wang,Yukun Xiao,Yang Zhao,Zhipan Zhang,Liangti Qu
Electrocatalytic hydrogen evolution reaction (HER) is of great significance to produce clean, sustainable, and cost-effective hydrogen. However, the development of low-cost and high-efficiency non-noble-metal catalysts with a combination of superior catalytic activity and long-time stability still remains a challenge. Herein, we demonstrate a rationally designed three-dimensional architecture assembled from one-dimensional molybdenum carbide (MoC)-based nanoribbons where the MoC nanoparticles are embedded within the nitrogen-doped crystallized carbon nanolayers (MoC@NC nanoribbon). Such unique architecture of the MoC@NC nanoribbon not only provides abundant edge active sites and multielectron pathways for efficient mass/charge transportation but also greatly accelerates the hydrogen release from the reaction surface, thus boosting its electrocatalytic performances for HER either in an acid or in an alkaline aqueous solution. This advance provides a promising candidate toward the replacement of the noble-metal-based catalysts for a highly stable and efficient HER electrocatalysis.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yue Qu,Tao Chen,Yuanhong Xu
It is in urgent to develop a facile sulfur ion (S 2- ) detection platform with good selectivity, sensitivity and portability, since the abnormal concentration of S 2- poses a serious threat to human health and environment. Nanozymes are expected as promising colorimetric probe for visual assays, but the selectivity is challenged since the mostly typical nanozymes are oxidoreductase-like ones while various analytes possess equivalent redox capacity. Herein, one-platform-two-channels detection method with both excellent selectivity and sensitivity was constructed based on the bifunctions of tin telluride (SnTe) nanobelts. On one hand, SnTe and S 2- can react rapidly to form a special brown product SnS to assure the selectivity; On the other hand, SnTe with peroxidase-like activity can oxidize 3,3’,5,5’-tetramethylbenzidine (TMB) to blue ox-TMB in the presence of H 2 O 2 , while strong reducing S 2- could inversely convert the solution from blue to colorless and then brown, enabling a wider range of S 2- detection (10 nM-900 μM) and low detection limit of 7.1 nM. In addition, this detection platform could still show excellent specificity against 19 other interfering substances in sulfur soaps with complex components. With the assistance of the color-to-value conversion function of a smartphone, a portable signal reading-out platform was established, which can successfully achieve the accurate visualization of the S 2− in 10 min
研究领域:
分析化学
·
环境科学
·
生物医学工程
✓ 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）