JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 14
·1163
·
IF 2.8
Liu Feng,Yu He,Fu Jian,Zhang Xiaowei
We investigate the thermoelectric performance and the stability of polycrystalline p -type Cu 2− x S fabricated by hydrothermal method and hot-pressing technique. The relative pure copper sulfides are obtained via the sintering process and their crystal structures are dependence on the atomic ratio of Cu/S. The thermoelectric performance tests show a good figure of merit of ZT = 0.78 at 550 °C. In addition, we repeated measured the thermoelectric parameters to confirm the stability of the samples. The electrical conductivity and the Seebeck coefficient have dramatically change between the different tests, which originate from the variation of carrier concentration and mobility. Nonetheless, the figure of merit ZT maintains unchanged, indicating that the samples synthesized in this work possess quite stable thermoelectric performance.
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2022
·Vol. 24
·期 3
·69
·
IF 2.533
Song Rong,Li Ying,Qian Jun
Perovskite has shown attractive optoelectronic performances and is a potential material in lighting, anti-counterfeiting, sensor, and other optoelectronic devices. Recently, spin-coating has been widely used in fabricating high-performance perovskite films, but it is difficult to process and apply in practice. In this paper, the CsPbBr 3 /Cs 4 PbBr 6 composite perovskite quantum dots with photoluminescence quantum yield of 36% and high storage stability were prepared by using room temperature ligand-assisted precipitation method and controlling the proportion of CsBr/PbBr 2 . In addition, the composite perovskite was ground and dispersed in the inks system. After adjusting the composition and ratio of the resin components, the inks were suitable for screen printing with a viscosity of 2439 mPa•s, an initial dryness of 25 mm/30 s, and a thorough dryness of 100 s/100 μm. By printing, the perovskite films exhibited high coverage, strong green emission, and outstanding fluorescence recovery ability after exposure to water. Screen printing perovskite inks have the characteristic of being patternable, which provides a solution for preparing a perovskite film in the application.
研究领域:
材料科学
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纳米科技
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光电子学
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印刷电子
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荧光材料
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 36
·16909-16917
·
IF 3.5
Xie Jingru,Fu Zhifen,Cheng Qing,Chen Chen,She Yubin,Li Xiangyi
Low temperature co-fired ceramics (LTCC) technology is extensively utilized to meet the requirements of device integration and miniaturization. Low-fired Li 3 Mg 2 NbO 6 ceramics doped with x wt% Li 2 O–MgO–B 2 O 3 –CaF 2 –SiO 2 glass (LMBCS, x = 0.5, 1.0, 1.5, 2.0) were prepared by the solid-state reaction method for applications in microwave communication materials. All samples exhibited a single-phase Li 3 Mg 2 NbO 6 structure. The addition of LMBCS glass effectively reduced the sintering temperature of Li 3 Mg 2 NbO 6 ceramics from 1250 °C to 875 °C. And adding LMBCS glass improved the Q × f value of Li 3 Mg 2 NbO 6 ceramics. The Li 3 Mg 2 NbO 6 -1.0wt% LMBCS ceramics exhibited outstanding microwave dielectric properties: ε r = 16.8, Q × f = 89,495 GHz, τ f = − 27.4 ppm/°C at 875 °C, which indicates that this ceramic is potential candidate materials for LTCC.
研究领域:
材料科学
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电子陶瓷
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功能材料
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无机非金属材料
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微波通信材料
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 50
·108538-108552
·
IF 5.8
Wang Yongqiang,Bai Yibo,Han Che,Li Zaimei,Lun Xiaowen,Zhang Conglu
Graphite-like carbon nitride (g-C 3 N 4 ) is favored for its excellent physicochemical properties. However, the high complexation rate of photogenerated carriers greatly limits its practical applications. Based on this, a novel CQDs-doped carbon nitride nanosheets composite (CNS/CQDs) was prepared and applied to the visible light–induced activation of peroxymonosulfate (PMS) for meloxicam (Mel) and tetracycline (TC) degradation. The photocatalytic degradation of Mel and TC were remarkably promoted in the CNS/CQDs+PMS+vis system. Mel photodegradation of 99.90% was achieved over 30 min with 20 mg CNS/CQDs and 20 mg PMS at pH11. And TC photodegradation of 95.97% was achieved over 45 min with 20 mg CNS/CQDs and 20 mg PMS at nature pH6.5. The TOC mineralization rates of Mel and TC were 75.49% and 52.00%, respectively. The transient photocurrent response and electrochemical impedance measurements (EIS) results indicated that the doping of CQDs could improve the charge transfer efficiency of pure g-C 3 N 4 , and CNS/CQDs had a low charge transfer resistance. Capture experiments and EPR tests explored the effective actives in the CNS/CQDs+PMS+vis system. Possible degradation pathways of Mel were also analyzed. This study provides valid residual drugs degradation under the dual conditions of visible light catalytic oxidation and persulfate oxidation, which will be a novel perspective for advanced oxidation technology to effectively remove organic pollutants from water.
研究领域:
环境科学
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光催化化学
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水处理技术
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纳米材料
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高级氧化工艺
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药物代谢
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环境污染物降解
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 7
·6832-6837
·
IF 2.195
Li Chunzhe
A series of Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ and Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ /Mn 2+ phosphors were fabricated by a solid state reaction. The phase composition and luminescent properties of the fabricated phosphors were investigated. The XRD patterns show that Eu 2+ and Mn 2+ were doped into the Ca 3 La 6 (SiO 4 ) 6 host in the present experiment. The Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ phosphors show the emission band in blue region and the Ca 3 La 6 (SiO 4 ) 6 :Mn 2+ phosphors exhibit the emission band in yellow region. The excitation band of Ca 3 La 6 (SiO 4 ) 6 :Mn 2+ overlaps with the emission band of Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ that means a possibility for the energy transfer process from Eu 2+ to Mn 2+ in the Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ /Mn 2+ phosphors. Tunable luminescence was obtained due to this energy transfer process and warm white light was emitted by Ca 3 La 6 (SiO 4 ) 6 :0.05Eu 2+ /0.04Mn 2+ and Ca 3 La 6 (SiO 4 ) 6 :0.05Eu 2+ /0.05Mn 2+ phosphors.
研究领域:
材料科学
·
无机化学
·
固体物理
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发光材料
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光学材料
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 31
·32345-32359
·
IF 2.914
Yu Binglong,Wang Jie,Yang Xiaoxin,Wang Wenlong,Cai Xiulan
In this paper, we synthesized a polyglycerol(PG)-mediated superparamagnetic graphene oxide nanocomposite called MGON, consisting of PG-modified superparamagnetic iron oxide nanoparticles (SPION) covalently bonded to PG-functionalized graphene oxide (GO). MGON exhibits better dispersibility and colloidal stability in aqueous solution than the magnetic graphene oxide reported in the literature. The physicochemical properties of MGON were analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), and UV-vis spectroscopy. Applied to the adsorption of tetracycline (TC) in aqueous solution as an adsorbent, the MGON showed excellent adsorption performance with the maximum adsorption capacity of 684.93 mg/g at 298 K. Adsorption kinetics and isotherm results indicate that the adsorption process conforms to the pseudo-second-order kinetics and Langmuir isotherm models. Adsorption thermodynamics has confirmed that the adsorption process of TC on MGON is spontaneous and endothermic. With the increase of temperature, the adsorption capacity of MGON increases continuously, and the adsorption capacity of MGON is the largest when the pH value is 7. Furthermore, the π-π and cation-π interaction, amidation reaction, and hydrogen bonding can be used to explain the adsorption mechanism of TC on MGON. Desorption and regeneration experiments showed that MGON still had 67.65% regenerative performance after five cycles. Hence, MGON is a promising adsorbent in the removal of tetracycline from wastewater.
研究领域:
环境科学
·
纳米材料学
·
污染物吸附
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水污染治理
·
环境功能材料
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DOI
高影响因子
Collagen and Leather
·
2023
·Vol. 5
·期 1
·22
·
IF 0
Xiao Meng,Liu Shuangmei,Qi Wenqian,Peng Yu,Yan Qingyu,Mao Hui
The utilization of chelation reaction between metals and tannins is a common tanning method in leather chemistry. Herein, a novel combination tanning mechanism inspired environmentally benign catalyst (CMBT-Fe 0 ) was synthesized by immobilizing Fe nanoparticles onto bayberry tannin (BT) grafted chitosan microfibers (CM). The obtained catalyst featured a well-defined microfibrous structure, on which Fe 0 nanoparticles were highly dispersed to exhibit exceptional catalytic activity for the degradation of tetracycline (TC). The catalytic activity of CMBT-Fe 0 was 1.72 times higher than that of the commercial Fe 0 nanoparticles without immobilization, with 95.03% of TC degraded within 90.0 min. The CMBT-Fe 0 catalysts were recycled 6 times, with the removal rate of TC maintained at 82.56%. Furthermore, a possible mechanism responsible for the catalytic removal of TC was provided by analyzing the catalytic degradation products via liquid chromatography-mass spectrometry. Therefore, our investigation successfully developed efficient catalysts to address the concerned environmental issue of antibiotic pollution. Graphical
研究领域:
环境化学
·
材料科学
·
催化
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水处理
·
纳米技术
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DOI
CELLULOSE
·
2021
·Vol. 28
·期 13
·8671-8691
·
IF 5.044
Zhao Ningning,Ma Haixia,Yao Ergang,Yu Zhong,An Ting,Zhao Fengqi,Yu Xiaojiao
Al/CuO nanothermites have displayed unique catalytic activities in accelerating the thermolysis of nitrocellulose (NC) and combustion characteristics of AP/HTPB propellant depending on the morphology of CuO. The kinetic triplet of NC-based composites was determined by multi- isoconversional methods, whereas the reaction models were reconstructed by employing a modified Šesták–Berggren equation based on the combined kinetic analysis. DSC and TG-FTIR results revealed that CuO and Al/CuO play crucial roles in accelerating the dissociation of –O–NO 2 bond and the coacervate phase to change the pyrolysis mechanism of NC from an autocatalytic reaction to a modified n -th order reaction model. It was also demonstrated that nanothermites were provided with a low starting temperature of pyrolysis, reduced exothermic peak temperature, low activation energy, and high total weight loss, confirming their better catalytic activity than their corresponding CuO, of which Al/CuO nanothermite, containing the gypsophila paniculata-like CuO, performs the best. Further, the shape of CuO was found to be significant in enhancing the burning rate of AP/HTPB propellant containing thermites, with the gypsophila paniculata-like presenting the best catalytic effect (43% improvement). Hence, introducing well-defined nanostructures is a promising way to improve the pyrolysis and combustion of energetic materials.
研究领域:
含能材料
·
推进剂化学
·
纳米催化
·
热分析
·
燃烧科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 13
·36807-36823
·
IF 5.19
Yao Chuqing,Dai Yaodong,Chang Shuquan,Zhang Haiqian
In this work, novel Prussian blue tetragonal nanorods were prepared by template-free solvothermal methods to remove radionuclide Cs and Sr. The as-prepared Prussian blue nanorods were identified and characterized by scanning electron microscopy, transmission electron microscope, Fourier transform infrared spectroscopic, thermogravimetric analysis, zeta potential, and surface analysis, and its sorption performance was tested by batch experiments. Our results suggest that Prussian blue nanorods exhibited better adsorption performance than co-precipitation PB or Prussian blue analogue composites. Thermodynamic analysis implied that the adsorption process was spontaneous and endothermic which was described well with the Langmuir isotherm and pseudo-second-order equation. The maximum adsorption capacity of PB nanorod was estimated to be 194.26 mg g −1 and 256.62 mg g −1 for Cs + and Sr 2+ (adsorbate concentration at 500 mg L −1 , the temperature at 298 k, pH at 7.0). Moreover, the experimental results showed that the Prussian blue nanorods have high crystallinity, few crystal defects, and good stability under alkaline conditions. The adsorption mechanism of Cs + and Sr 2+ was studied by X-ray photoelectron spectroscopy, X-ray diffraction, and 57 Fe Mössbauer spectroscopy. The results revealed that Cs + entered the PB crystal to generate a new phase, and most of Sr 2+ was trapped in the internal crystal and the other exchanged Fe 2+ . Furthermore, the effect of co-existing ions and pH on PB adsorption process was also investigated. The results suggest that PB nanorods were an outstanding candidate for removing Cs + and Sr 2+ from radioactive wastewater.
研究领域:
环境科学
·
放射化学
·
纳米材料
·
废水处理
·
吸附技术
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DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2024
·Vol. 33
·期 2
·885-898
·
IF 4.7
Xiao Huan,Zhou Minghao,Sun Fengkun,Song Xincheng,Huang An
Polylactic acid (PLA) is a widely used biodegradable polymer, but its brittleness severely limits its further application. This study explores the preparation of anisotropic polylactic acid/thermoplastic polyurethane (PLA/TPU) foam through melt blending with elastomers, rolling, and supercritical fluid foaming (SCF), which substantially enhances the toughness of PLA. Results indicate that the crystallinity and elongation at break of PLA/TPU blend improve with increasing rolling temperature and rolling rate. Notably, at a rolling temperature and a rolling rate of 50%, the elongation at break for the PLA/TPU blends increases from 4.0 to 59.0%. In addition, SCF processing yields an anisotropic, highly oriented, and elongated cell structure within PLA/TPU foam. This cellular architecture further elevates the elongation at break of the rolled PLA/TPU blend to 76.8% and 1820.0%. This research offers a straightforward, environmentally friendly, and scalable method for fabricating high-strength PLA-based foam materials, equipping them with functionalities such as buffering, sound absorption, shock absorption, heat preservation, etc., which is suitable for electronics, home appliances, sports and other fields.
研究领域:
材料科学
·
高分子科学
·
泡沫材料工程
·
绿色材料
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聚合物力学性能
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DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 2
·889-896
·
IF 2.817
Ren Siyun,Wang Fang,Wang Pei,Wang Pengfei,Song Xiaoying,Huang Yi,Chio U-Fat,Wang Wei
Two modified products of Na 2 Li 2 Ti 6 O 14 were prepared via O-site replacement by F − and Cl − doping and employed to store lithium during cycles. Through tests of structure and electrochemical properties, it seems that substituting part of the O-site for low-valent ions enables better ionic and electronic conductivities of pristine Na 2 Li 2 Ti 6 O 14 . As a consequence, the modified products exhibit preferable electrochemical performance when compared with the pristine one, especially for the Na 2 Li 2 Ti 6 O 13.7 F 0.3 , which displays the best reversible charge specific capacity of 121.20 mAh g −1 and the battery was tested at 100 mA g −1 . Moreover, in situ XRD results explain that the great reversibility of structure is significant to the excellent lithium storage property of Na 2 Li 2 Ti 6 O 13.7 F 0.3 for the rechargeable lithium-ion batteries. Graphical abstract
研究领域:
材料科学
·
电化学
·
储能
·
锂离子电池
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 33
·2187
·
IF 2.8
Liao Bo-Kai,Zhou Zong-Yi,Luo Zhi-Gang,Wu De-Quan
In this work, the corrosion behavior of Sn-3.0Ag-0.5Cu (SAC305) tin-based solder alloy at relatively lower temperature is firstly investigated using electrochemical methods. Effects of temperature and sodium chloride (NaCl) concentration on the corrosion behavior are discussed in detail. Results indicate that the anti-corrosion ability decreased when temperature rising at the same NaCl concentration. On the other hand, the corrosion resistance of SAC305 alloy increased with a lager chloride concentration at relatively lower temperatures, whereas the opposite conclusion was reached at high temperatures. X-ray diffraction meter (XRD) and scanning electron micrograph (SEM) studies revealed that at low temperature, chloride ion reacted with SAC305 alloy forming insoluble basic tin chloride with tin alloy, which covered on metal surface and inhibited corrosion process. However, this process is disrupted at relatively higher temperatures due to chloride ions attacked the tin-oxide protective film on the metal surface, further promoting pitting corrosion. Relevant mechanism has been proposed to clarify the roles of temperature and NaCl concentration in the corrosion process for SAC305 alloy in NaCl solution.
研究领域:
材料科学
·
腐蚀工程
·
电化学
·
电子材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）