JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2014
·
IF 1.61
Pengjun Zhao,Lei Wang,Liang Bian,Jinbao Xu,Aimin Chang,Xinqian Xiong,Fanglong Xu,Jiaqi Zhang
Three-dimensional hierarchical structure coral-like BaTiO 3 nanoparticles have been self-assembled by a facile one step hydrothermal method . Cetyltrimethyl ammonium bromide (CTAB), Ba(OH) 2 ·8H 2 O and tetrabutyl titanate have been used as precursors. The prepared BaTiO 3 exhibits cubic perovskite phase at room temperature, and the coral-like architecture is a micro-nano hiberarchy consisted of dendrimer-like structure and trunk-like structure. By adjusting the hydrothermal duration and the precursor substances, a surfactant induced mechanism is proposed to understand the self-assembly process. UV-vis measurement demonstrates that the as-prepared BaTiO 3 nanoparticles exhibit dozens of times overwhelming absorptive character compared to the ordinary nanospheres at ultraviolet band, which is benefited from the coral-like porous framework. Moreover, halogen anions( F − , Cl − , Br − , and I − ) have been chosen to adjust the coral-like BaTiO 3 physical properties. Results show the halogen doping produces distinct modulation effect on the grain size, UV-vis absorbance and photoluminescence properties of the materials. The coral-like BaTiO 3 nanoparticle and its halogen modified ramifications offer significant opportunities to develop nano-laser devices, photon detectors, photocatalyst based on BaTiO 3 perovskite materials.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Hengdong Ren,Sheng Wang,Wei Lian,Jialin Ma,Yan Zhao,Yin Liu,Ling Bing Kong,Tian shu Zhang,Won-Chun Oh
Palygorskite (Pal) was used as frameworks to disperse Fe 3 O 4 and polyaniline (PANI) nanoparticles for the preparation of coral-like Pal-dispersed Fe 3 O 4 /PANI composites with improved electromagnetic absorption performance. The processing was a combination of hydrothermal synthesis and simple mechanical stirring. With increasing content of Pal, specific surface area of the Pal-dispersed Fe 3 O 4 /PANI composites was increased from 21.14 m 2 /g to 29.69 m 2 /g, while the composites exhibitd fluffy coral-like structure due to the cation exchange mechanism and rich silanol (Si-OH) group of Pal. Since various loss mechanisms and improved impedance matching , the Pal-dispersed Fe 3 O 4 /PANI displayed an optimal reflection loss of −62.45 dB and a broad effective absorption bandwidth of 5.05 GHz. Therefore, this work develops an inexpensive framework to disperse nanoparticles for electromagnetic absorption materials , while new application of Pal is proposed.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tengfei Xu,Qingcai Chen,Huan Liu,Tong Sha,Wenhao Liu,Jingwen Cheng,Yukun Hu
Polyaniline (PANI) is one of the most potential materials as ammonia (NH 3 ) gas sensors owing to its reversible protonation and deprotonation nature. However, the detection limit and reversibility of pristine PANI nanomaterials need to be further improved to meet the requirements for high performance sensors under the premise of lower energy consumption and safety conditions in various fields. A trace sensor for NH 3 based on coral-like pristine PANI nanorods was successfully tailored via modified chemical oxidation polymerization. The distinctive coral-like structure of PANI nanorods facilitates the generation of more reactive active sites and interconnected carrier transport channels, which contribute to the performance of the sensor. The PANI sensor exhibits a sub-ppm detection limit (36 ppb) for NH 3 at 24 ℃, in addition to a favorable selectivity and excellent long-term stability properties. Furthermore, it was observed that the application of high relative humidity treatment facilitated the removal of the ammonium salts that had accumulated on the surface of the reacted PANI sensors, thereby restoring the fixed resistance to its initial value. The feasibility of the application of this sensor was demonstrated through monitoring the spoilage of fresh shrimp by means of an integrated circuit system. The findings demonstrated that the synthesized pristine PANI sensor exhibited notable advantages, rendering it a viable option for practical applications in the detection of NH 3 .
研究领域:
材料科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2024
·Vol. 15
·期 12
·1486
·
IF 3
Yuqi Wang,Yong Liu,Minmin Wang,Wenjun Wu,Maofei Tian,Tao Zhu
This study introduces the development of a W-M1.0electrochromic film, characterized by a “coral”-like TiO2@WO3heterostructure, synthesized via a hydrothermal process leveraging the inherent instability of MXene. The film showcases exceptional electrochromic performance, with a coloring response time of 2.8 s, a bleaching response time of 4.6 s, and a high coloring efficiency of 137.02 cm2C−1. It also demonstrates a superior light modulation ability of 73.83% at 1033 nm. Notably, the W-M1.0film exhibits remarkable cyclic stability, retaining over 90% of its initial light modulation capacity after 4000 cycles, outperforming many existing electrochromic materials. The film’s enhanced performance is credited to its coral-like structure, which boosts the specific surface area and promotes ion transport, and the TiO2@WO3heterojunctions, which enhance charge transfer and stabilize the material. Devices fabricated with the W-M1.0film as the cathode and a PB film as the anode exhibit a seamless transition from dark blue to colorless, underscoring their potential for smart window and dynamic glass applications.
研究领域:
材料科学
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 3
·1-13
·
IF 5.3
Bi Leyao,Fu Boyan,Lin Jiahui,Wen Junsheng,Fu Jiaxing,Zou Binglin,Su Ningning,Wang Chunjie,Wang Yue
Ag-modified ZnO coral-like nanosheets were synthesized for the first time using a simple hydrothermal method. Compared to other Ag-modified ZnO sensors, the sensor with 2 wt% Ag content demonstrates excellent ethanol-sensing performance. The maximum response value of 67.42 can be achieved at the optimal operating temperature of 260 °C for 100 ppm ethanol gas, with corresponding response/recovery time of 6/75 s, respectively. This sensor also exhibits superior selectivity, reproducibility, and long-term stability. Techniques such as XRD, XPS, SEM, and TEM were employed to characterize the physicochemical properties of the gas-sensitive materials. Further research indicates that the enhanced gas-sensing properties of the composite materials can be mainly attributed to the unique coral-like nanosheet structure, the relatively high-specific surface area (9.8706 m 2 /g), and the combined effects of the Ag-ZnO heterostructure, as well as the synergistic interplay of electronic sensitization and spillover effects. This research offers valuable insights into the modification of ZnO-based gas-sensing materials with noble metals. Graphical
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yinan Gu,Guixiang Teng,Xiaodong Jin,Liping Wang,Zengwei Qiang,Weigang Ma,Chun Zhang
A coral-like ZnO/C-ZnFe2O4 (Z/C-ZFO) photocatalyst was synthesized by simulating the structural characteristics of coral since its structure is conducive to the capture and absorption of light. The synthesis process involves a two-step process. First, flowerlike hierarchical precursors were synthesized through a hydrothermal self-assembled route. Next, the precursors were thermally annealed in a nitrogen atmosphere after doping with a zinc source. In addition to forming heterojunctions that enhance its photocatalytic properties, the coral-like nanostructures endowed Z/C-ZFO with significant light-harvesting efficiency. Finally, the photocatalyst was used for antibacterial applications against Escherichia coli and Staphylococcus aureus bacteria. The results showed that the optimized sterilization efficiencies toward E. coli and S. aureus bacteria were 99.4 and 98.0%, respectively, combined with excellent cycling stability. The method of designing and synthesizing coral-like structures in this study may also be extended to the synthesis of other photocatalytic and optical materials.
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yaoyao Zhu,Yeqiang Lu,Hang Yu,Guojun Jiang,Xueting Zhao,Congjie Gao,Lixin Xue
Super-hydrophobic F-TiO 2 @PP membranes were developed from polypropylene (PP) non-woven fabric by in situ cross-linking polymerization of trifluorofluorooctyl methacrylate (FOMA) and sol–gel-derived titanium dioxide with vinyltriethoxysilane (VTES). Due to the formation of super-hydrophobic “coral”-like synapses on the filamentous surfaces of PP non-woven fabric, F-TiO 2 @PP membranes showed extremely high water contact angles up to 157° and capability of rapidly absorbing oil drops. The F-TiO 2 @PP membranes were also able to expel water from water-in-oil emulsions with robustly high oil permeate fluxes (up to 11,000 L m −2 h −1 under gravity), water removing efficiency (up to 99.7%), re-usability and long-term stability even at the presence of surfactant and salts. Such superior performance could lead to potential applications in rapid collection and efficient purification of recovered oily organic components from waste liquids or accidental oil discharges in marine or continental situations.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 79
·75251-75257
·
IF 3.289
Weidan An,Ling Liu,Yanfang Gao,Yang Liu,Jinrong Liu
Coral-like Ni0.9Co1.92Se4 nanostructured materials have been prepared through a simple and controlled two-step solvothermal method, which present a handsome electrochemical performance. The specific capacitance reaches 1021.1 F g−1 under the current density of 2 mA cm−2 over a 0.5 V electrode potential window with an areal capacitance of 6.43 F cm−2. A superior rate capability of 77% is achieved with discharge rates increasing from 2 to 50 mA cm−2, as well as a good cycling stability of 88.39% after 5000 cycles. Furthermore, a good energy density of 26.29 W h kg−1 is achieved under the power density of 265 W kg−1 when assembled into a Ni0.9Co1.92Se4//AC asymmetric supercapacitor with the operating potential window extended to 1.5 V. The high performance can be attributed to the coral-like architectures with rich redox reactions, high conductivity and transport rate for both electrons and electrolyte ions. Our results suggest that the coral-like Ni0.9Co1.92Se4 nanostructured electrode materials may be a good choice for supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2015
·Vol. 18
·期 5
·714-720
·
IF 4.034
Kai Sun,Changgeng Sun,Shaokun Tang
Coralloid Fe3O4 nanoclusters stacked by nanosheets are successfully synthesized using ferric nitrate as a precursor with an ionic liquid-assisted solvothermal method. For comparison, spherical Fe3O4 nanoclusters assembled by nanospheres are synthesized in the absence of ILs. The morphologies and structures of the products are further characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray power diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicate that the ionic liquid 1-n-decyl-3-methylimidazolium chloride ([Dmim]Cl) plays an important role in controlling the growth orientation of building blocks via selectively adsorbing on a specific crystal plane. A formation mechanism has been proposed based on the interaction between ILs and Fe3O4 crystal planes. The catalytic activity of nanoclusters has been evaluated with the Fenton reaction under UVA irradiation. The coralloid nanoclusters show the highest catalytic activity for the degradation of phenol due to their special morphology and unique surface properties. The synthesis strategy may provide a new way to construct nanomaterials with novel morphologies and excellent properties.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 15
·3191
·
IF 5
Yuhang Du,Gang Jian,Chen Zhang,Fengwei Wang
Piezoelectric nanogenerators have prospective uses for generating mechanical energy and powering electronic devices due to their high output and flexible behavior. In this research, the synthesis of the three-dimensional coral-like BaTiO3(CBT) and its filling into a polyvinylidene fluoride (PVDF) matrix to obtain composites with excellent energy harvesting properties are reported. The CBT-based PENG has a 163 V voltage and a 16.7 µA current at a frequency of 4 Hz with 50 N compression. Simulations show that the high local stresses in the CBT coral branch structure are the main reason for the improved performance. The piezoelectric nanogenerator showed good durability at 5000 cycles, and 50 commercial light-emitting diodes were turned on. The piezoelectric nanogenerator generates a voltage of 4.68–12 V to capture the energy generated by the ball falling from different heights and a voltage of ≈0.55 V to capture the mechanical energy of the ball’s movement as it passes. This study suggests a CBT-based piezoelectric nanogenerator for potential use in piezoelectric sensors that has dramatically improved energy harvesting characteristics.Keywords:piezoelectric energy harvesting;three-dimensional coral-like BaTiO3;polyvinylidene fluoride (PVDF);flexible
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Honghui Zeng,Chuhan Wan,Yuansong Ye,Yuchi Zhang,Huazhong Wu,Run Fang
The fabrication of micro/nano hierarchical structures is a crucial step in imparting super-wettability to materials. However, existing methods often suffer from drawbacks such as low efficiency, complex processes, and limited applicability. In this study, a simple one-step deposition process was employed to prepare a coral-like coating with a micro/nano hierarchical structure. This was achieved through the precipitation copolymerization of a renewable biomaterial, urushiol, with 1,6-hexamethylenediamine (HDA) in an ethanol solution. The reaction mechanism of the precipitation copolymerization and the formation of the deposited coating were investigated using chemical structure and surface morphology characterization. The study also examined the effects of various reaction conditions, including reactant ratios and solution pH, on coating morphology and hydrophobicity. Due to the unique functional groups and microstructures, the urushiol-HDA deposition modification imparted high hydrophobicity to various substrates without using low-surface-energy modifiers, demonstrating its broad applicability. Furthermore, secondary modifications of the deposited coating endowed the substrates with more diverse chemical structures and surface properties. Thus, the ease of preparation, broad applicability, and tunable modification effects make the urushiol-HDA deposition modification a promising method for creating super-wetting surfaces.
研究领域:
材料科学
·
化学工程
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2017
·
IF 2.435
Mingwei Shi,Yuyao Zhang,Mengdi Bai,Baoming Li
Polyaniline (PANI) with coral-like nanostructure was prepared via chemical oxidative polymerization in the presence of sunset yellow (SY) as dopant and surfactant. The results showed that in comparison with the microsized bulky structure of PANI undoped with SY, the coral-like nanostructure of PANI doped with SY (PANI/SY) was observed and the diameter of coral branch decreased from 180 nm to 100 nm with the increase of feeding molar ratio of SY to aniline. Coral-like PANI/SY showed the large specific capacitance of 467 F/g and nice electrochemical stability when the feeding molar ratio of SY to aniline was 0.035:1, owning to its special coral-like nanostructure and high conductivity of 15.0 S/cm, which was essentially attributed to the synergistic effects of high doping level, ordered arrangement of PANI chain and strong π–π interaction between PANI and SY.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）