Materials
·
2014
·Vol. 7
·期 5
·3786-3801
·
IF 1.879
Ruxangul Jamal,Yakupjan Osman,Adalet Rahman,Ahmat Ali,Yu Zhang,Tursun Abdiryim
Poly(3,4-propylenedioxy-2,2′:5′,2″-terthiophene)/TiO2and poly(3,4-(2,2-dimethylenepropylenedioxy)-2,2′:5′,2″-terthiophene)/TiO2nanocomposites were synthesized by a simple solid-state method. Additionally, the poly(3,4-propylenedioxy thiophene)/TiO2and poly(3,4-2,2-dimethylenepropylenedioxythiophene)/TiO2nanocomposites were synthesized in a similar manner for comparison. The structure and morphology were characterized by Fourier transform infrared (FTIR), ultraviolet-visible (UV-Vis) absorption spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). The photocatalytic activities of the nanocomposites were examined through the degradation processes of a methylene blue (MB) solution under UV light and sunlight irradiation. The results of FTIR and UV-Vis spectra showed that the composites were successfully synthesized by solid-state method and the poly(3,4-propylenedioxy-2,2′:5′,2″-terthiophene)/TiO2and poly(3,4-(2,2-dimethylenepropylenedioxy)-2,2′:5′,2″-terthiophene)/TiO2nanocomposite had a higher oxidation degree and conjugation length than others. The results also indicated that the TiO2had no effect on the crystallinity of composites, but was well embedded in the polymer matrix. Additionally, the highest degradation efficiency of 90.5% occurred in the case of the poly(3,4-propylenedioxy-2,2′:5′,2″-terthiophene)/TiO2nanocomposite.Keywords:polyterthiophene derivative;nano-TiO2;solid-state method;photocatalyst
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 29
·23187-23195
·
IF 2.779
Yi Junhui,Li Minghao,Xie Runkun,Liao Xiaoying,You Jinfeng,Chen Beifang,Liu Qiqi,Huang Weili
CuBi 2 O 4 is widely used in photocatalytic degradation for pollutants in water due to its strong visible light response characteristics, excellent chemical stability, non-toxic, and low cost. Here, stone-shaped CuBi 2 O 4 was prepared with CuO and Bi 2 O 3 as raw materials by high temperature solid phase. The effect of calcined temperature and time on the product was discussed. This material was analyzed and discussed by XRD, SEM, XPS, and DRS, and the visible light activity of degradation for Orange II was explored. The results showed that the absorption edge of prepared CuBi 2 O 4 expands to the visible region, and the band gap was about 1.77 eV. The photocatalytic degradation rate of Orange II was 42.6% under the optimal conditions. After H 2 O 2 assisted, the degradation rate was more than 2 times, and repeated experiments verified that the prepared catalysts had high stability. Finally, a reasonable mechanism of H 2 O 2 assisted degradation enhancement is proposed. This work gives new ideas for the preparation of new and efficient catalytic materials.
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
CHEMICAL COMMUNICATIONS
·
2015
·Vol. 51
·期 15
·3227-3230
·
IF 6.834
Maowen Xu,Jun-Ke Hou,Yu-Bin Niu,Guan-Nan Li,Yu-Tao Li,Chang Ming Li
Na2.65Ti3.35Fe0.65O9 rods were prepared by a simple solid-state route and coated with carbon to enhance their electronic conductivity. For the first time, Na2.65Ti3.35Fe0.65O9 was explored as an anode material for Na-ion batteries to deliver a discharge capacity of 137.5 mA h g−1 at a current rate of 40 mA g−1. The charge/discharge capacity of a carbon-coated sample increased by 46.3% to achieve 201.1 mA h g−1.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 22
·5317
·
IF 4.2
Haitao Ren,Fan Qi,Xiangbo Feng,Jiaxiang Liu,Yuzhen Zhao
The liquid-phase method is the most commonly utilized strategy for synthesizing fluorescent carbon quantum dots (CQDs). However, the liquid-phase synthesis of CQDs faces challenges such as low yield, complex purification, and the use of toxic solvents, which limit large-scale production and practical applications. In this study, fluorescent CQDs with a high product yield of 78% were synthesized using glucose as a carbon source through a green and facile one-step solid-phase approach, without solvents or post-treatment. A systematic study of the structure and fluorescence properties of the synthesized CQDs was conducted using various characterization techniques. The results indicated that the mean size of obtained CQDs was 4.1 nm, and that their surface had abundant oxygen-containing functional groups, resulting in favorable water solubility. The synthesized CQDs exhibited excitation-dependent fluorescence, with optimal excitation and emission wavelengths at 358 and 455 nm, respectively. Additionally, the CQDs solution showed bright blue fluorescence under 365 nm UV light, with a quantum yield of 6.21% and a fluorescence lifetime of 3.02 ns. This study offers valuable insights into the green and efficient synthesis of fluorescent CQDs powder.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Superconductivity and Novel Magnetism
·
2020
·Vol. 33
·期 11
·3607-3613
·
IF 1.244
Zhang Zhanjun
In this work, we reported the Ce-Cu co-substituted M-type strontium hexaferrites Sr 0.7 Ce 0.3 Fe 12- x Cu x O 19 (0.00 ≤ x ≤ 0.50) prepared by using the solid-state method. The specific effect of Ce-Cu co-substitution on the magnetoplumbite structure and magnetic properties were studied systematically. The canonical M-type strontium hexagonal phase has been formed for our prepared sample in all doping range, which also has been confirmed by FTIR spectrum. In all compositional range, by the way, the magnetic competition of ferromagnetism-antiferromagnetism is reduced and gradually disappeared under the increasing substitution. Likewise, an obvious improvement of magnetic properties can be obtained; that is, H c increases from 2850 to 3800 Oe and the value of M s can reach up to 70.305 emu/g. The intrinsic stability and superior magnetic performance of such kind of material indicate a promising potential candidate in multilayer inductors.
研究领域:
材料科学
·
磁性材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·
IF 1.8
Biao Yang,Bo Yin,Han Chen,Yifeng Zheng
LiCoO 2 has become the most widely used cathode material in lithium-ion batteries because of its high capacity and excellent stability. The high-temperature solid-state method is commonly used for the preparation of LiCoO 2 . However, this method will produce highly penetrating Li 2 O, which causes spall or fracture of the insulating refractory materials in the kiln. In this study, the corrosion resistance of bubble alumina, mullite, and calcium hexaaluminate (CA 6 ) insulating refractories to LiCoO 2 has been thoroughly investigated. Combining the laboratory-scale interfacial reaction experiments with post-experimental life cycle analysis of industrial insulating refractories, the interaction between the insulating refractory materials and LiCoO 2 after calcination at 900°C for 5 h and the corrosion behavior of LiCoO 2 on different insulating refractory materials following heat treatment at 900°C for 5 h every time and repeated seven times are investigated. The corrosion mechanisms are concluded by analyzing the physicochemical composition and macro- and micromorphology of the three insulating refractory materials before and after corrosion. The results can provide a basis for the use of insulating refractories in the development of lithium batteries.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Optoelectronics Letters
·
2020
·Vol. 16
·期 6
·401-404
·
IF 0
Li Shi-na,Ma Rui-xin,Niu Jian-wen
Cu 2 NiSnS 4 nanoparticles were prepared for the first time using a facile solid-phase process at a temperature of 180°C. The crystalline structure, morphology and optical properties of the Cu 2 NiSnS 4 nanoparticles were characterized by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM) and ultraviolet-visible (UV-vis) spectrophotometer. The band gap and conversion efficiency of Cu 2 NiSnS 4 nanoparticles were studied at various temperature. The results showed that the Cu 2 NiSnS 4 nanoparticles exhibited an optimum band gap of 1.58 eV and a conversion efficiency of 0.64% at 180 °C, indicating that it maybe be useful in low-cost thin film solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2013
·
IF 2.39
Songping Wu,Qing Ma
Zn 2 GeO 4 ceramic materials were synthesized by solid-state method. Zn 2 GeO 4 powders were investigated with X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectrum, Raman spectrum, X-ray photoelectron spectrum (XPS), and high resolution transmission electron microscopy (HRTEM). A dense microstructure of Zn 2 GeO 4 ceramics developed when specimens were sintered at above 1150 °C. The Zn 2 GeO 4 ceramics sintered at 1300 °C exhibited good microwave dielectric properties: a dielectric constant ( ε r ) of 6.87, a quality factor ( Q × f ) of 102,700 GHz and a temperature coefficient of resonant frequency ( τ f ) of −32.4 ppm/°C. The results showed that Zn 2 GeO 4 ceramics were promising millimeter-wave ceramic candidate materials.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2013
·
IF 2.39
Songping Wu,Juanjuan Xue,Rui Wang,Jianhui Li
Spinel MgGa 2 O 4 ceramic materials were synthesized by solid-state method. MgGa 2 O 4 powders were investigated with X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectrum, Raman spectrum, X-ray photoelectron spectrum (XPS), and high resolution transmission electron microscopy (HRTEM). The spinel-structured MgGa 2 O 4 ceramics sintered at 1410 °C exhibited excellent microwave dielectric properties: a dielectric constant ( ɛ r ) of 9.54, a quality factor ( Q × f ) of 117,000 GHz (at 14.7 GHz frequency) and a temperature coefficient of resonant frequency ( τ f ) of −4.0 ppm/°C. MgGa 2 O 4 ceramics have a wide sintering temperature region (∼150 °C) and nearly zero τ f value. The large relative density, uniform microstructure and cation ordering resulted in high Q × f values. Crystal distortion from the oriented growth was advantageous to produce nearly zero τ f value. MgGa 2 O 4 ceramics are promising candidate materials for millimeter-wave devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 3
·529
·
IF 3.9
Linshuang Xue,Chenyi Yuan,Shipeng Wu,Zhen Huang,Zhen Yan,Stéphane Streiff,Hualong Xu,Wei Shen
Coalbed methane is a significant source of methane in the atmosphere, which is a potent greenhouse gas with a considerable contribution to global warming, thus it is of great importance to remove methane in coalbed gas before the emission. Exploring the economical non-noble metal catalysts for catalytic methane combustion (CMC) has been a wide concern to mitigate the greenhouse effect caused by the emitted low-concentration methane. Herein, a series of Mn-doped Co3O4catalysts have been synthesized by the environmentally friendly solid-state method. As a result, the Mn0.05Co1catalyst performed the best CMC activity (T90= 370 °C) and good moisture tolerance (3 vol% steam). The introduction of an appropriate amount of manganese conduced Co3O4lattice distortion and transformed Co3+to Co2+, thus producing more active oxygen vacancies. Mn0.05Co1exhibited better reducibility and oxygen mobility. In situ studies revealed that methane was adsorbed and oxidized much easier on Mn0.05Co1, which is the crucial reason for its superior catalytic performance.Keywords:active oxygen;catalytic combustion;low-concentration;methane;Mn-Co3O4;solid-state
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2020
·Vol. 24
·期 4
·821-828
·
IF 2.646
Li Yuanchao,Xu Guangri,Fan Shumin,Ma Jingjing,Shi Xiaohui,Long Zaixin,Deng Wenjie,Fan Wenxiu,Yang Shuting
Synthesis method is crucial to the improved electrochemical performances of LiMnPO 4 materials with poor electronic and ionic conductivity for large-scale preparation. Here, carbon-coated LiMn 0.8 Fe 0.2 PO 4 materials were synthesized through a rheological phase-assisted solid-state method combined with freeze-drying. Effect of different carbon sources on the structure, morphology, and electrochemical performance of as-prepared LiMn 0.8 Fe 0.2 PO 4 materials was investigated. The results suggest that LiMn 0.8 Fe 0.2 PO 4 materials with citric acid as carbon sources show a high discharge capacity with 164, 122, and 106 mA h g −1 at 0.1, 1, and 5 C, and a capacity retention of around 99.6% after 100 cycles at 1 C. This can be attributed to higher surface area, intense peak of sp 2 N–C=N bonds, and uniform particle distribution resulting from the rheological phase formed using citric acid as carbon sources combined with freeze-drying. The rheological phase-assisted solid-state method is a promising route for production of LiMn 0.8 Fe 0.2 PO 4 materials with excellent performances.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MRS Advances
·
2022
·Vol. 7
·期 30
·736-740
·
IF 0
Guo Yong,Tan Junlang,Zhao Jingchang
In this work, (La, Eu) co-doped CaCu 3 Ti 4 O 12 ceramics (Ca 1− x La x Cu 3 Ti 4− x Eu x O 12 (CLCTEO)), x = 0.1, 0.3, and 0.5) were prepared by the solid-state method. The phase structure, morphologies, dielectric properties, and impedance spectrum were investigated methodically. The XRD of CLCTEO ceramics confirmed the formation of the complex perovskite with a residual amount of CaTiO 3 . The refined calculation found that the lattice parameter of CLCTEO ceramics will significantly increase due to the co-doping of La and Eu. The FESEM analysis shows that the grain size of co-doped CCTO is smaller, reaching the nanometer scale. Impedance indicates that the (La, Eu) co-doped CCTO ceramics have higher dielectric permittivity than the single-doped with La or Eu. The results show that co-doping is an effective method to improve the dielectric properties of CCTO ceramics. Graphical abstract
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
危险品化学品经营许可证（带存储）