ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Shutong Hao,Xiaolin Liu,Qianli Li,Mu Gu,Shuai Cheng,Jingtai Zhao
The demand for scintillators with ultrafast decay times, high spatial resolutions, and high stabilities is increasing due to the development of ultrafast hard X-ray detection, hard X-ray imaging, and high-energy physics facilities. γ-CuI single crystals, which exhibit ultrafast luminescence and high stopping power for hard X-rays, hold great promise for such applications. However, slow luminescence and poor stability caused by surface iodine deficiencies hinder the practical use of γ-CuI. Herein, we treated a γ-CuI single crystal by iodine annealing and SiO2 coating and investigated its crystal structure and luminescence properties in detail. Iodine annealing significantly enhanced the near-band-edge emission of the γ-CuI crystal with an ultrafast decay time of less than 1 ns, while completely suppressing the slow luminescence. Moreover, the SiO2 film effectively prevented the oxidation and decomposition of surface iodine, leading to substantial improvement in luminescence stability. The γ-CuI crystal demonstrated an ultrahigh spatial resolution of 1.5 μm in X-ray imaging, highlighting its potential for ultrafast hard X-ray imaging applications. This study provides insight into the growth, optimization, and application of γ-CuI crystals, advancing the field of scintillator materials.
研究领域:
材料科学
·
光学工程
·
核技术应用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 1
·016404
·
IF 2.025
Xiaojuan Feng,Yanlong Shi,Xuelong Yin,Xue Wang
In the past decades, the studies of materials with transparency and durable superhydrophobicity have captured much attention because of the versatile uses in outdoor glass wall, automobile windshield and solar panel. In this paper, a superhydrophobic and transparent SiO2 film with transmittance over 44% was obtained on glass substrate with a facile method of dip-coating without further modification. The contact angle and sliding angle of water droplet on the superhydrophobic film is 163.1° and 4°, respectively. The results reveal the performance of superhydrophobicity originates from the synergistic effects of rough SiO2 structures and hydrophobic alkyl with low surface energy. The SiO2 coating exhibits self-cleaning ability, anti-fouling property and anti-scaling performances. Furthermore, the SiO2 coatings have good thermal stability and resistance ability to acid and base. The techniques adopted here have the advantage of simple process, low cost and fluorine-free treatment, which may provide an useful reference for the preparation of transparent and superhydrophobic film in practice.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 33
·25383-25391
·
IF 2.779
Zhang Cong,Liu Xiansong,Kan Xucai,Feng Shuangjiu,Zhu Yong,Yang Yujie,Zhang Zongyang
Soft magnetic composites serve in electrical applications and sustainable energy supply, the magnetic flux changes in response to changes of the applied magnetic field, with energy loss. To reduce the loss, in this paper, the soft magnetic composite Fe 50 Ni 50 powder coated with nano-SiO 2 was prepared by tetraethoxysilane sol–gel method, and the microstructure of the coating was characterized. Then, soft magnetic Fe 50 Ni 50 powder cores have been prepared, and annealed with different atmospheres. The power loss is lower when the magnetic cores were annealed in a reducing hydrogen atmosphere. The lowest power loss (1390.7 mW/cm 3 , f = 1000 kHz, B = 50 mT, 120 °C) was obtained when the cores annealed at 730 °C in H 2 atmosphere. The results show that the eddy current loss is significantly reduced by coating SiO 2 , and the power loss is reduced about 33% in high-frequency (1 MHz and 50 mT, 25 °C). From 25 to 120 °C, the power loss at 1 MHz decreases by about 33% due to the reduction of hysteresis loss and eddy current loss. The excellent properties are very applicable for the inductors of 5G technology.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·
IF 3.9
Renhan Li,Gongxun Bai,Hongbin Zhang,Enhai Song,Jiasong Zhang,Denghao Li,Junjie Zhang,Shiqing Xu
As an environment-friendly powder with good coloring performance, rare earth sulfide is one kind of the important choices to replace cadmium and lead colorants. In particular, γ-Ce 2 S 3 belongs to rare earth sesquisulfide, which has a bright red color. However, the uncoated γ-Ce 2 S 3 is easy to decompose and release H 2 S in a humid or acidic environment, and its air thermal stability is limited to 350°C. In this work, γ-Ce 2 S 3 powders coated with zinc oxide were prepared by heterogeneous precipitation method, and a dense protective layer was formed by ZnO to improve chemical and thermal stability. Moreover, silicon dioxide was deposited on the surface of the zinc oxide coating using the microemulsion process to strengthen the powder's acid resistance. The double shells structure greatly promoted thermal stability and acid resistance of γ-Ce 2 S 3 powders. The results showed that rare earth sulfide powders with double shells have good stability for coloring applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2025
·
IF 4.4
Tao Zhu,Yuan Yuan,Xingde Wei,Xujiang Hua,Xu Dai,Huiying Xiang,Linbo Song,Ruijin Liao
Ice accretion on wind turbine blades severely impacts the power generation efficiency, equipment lifespan, and safe operation of wind farms. Low-interfacial toughness materials have demonstrated potential for large-scale deicing under controlled laboratory conditions. However, their anti-icing and deicing performance in complex and harsh natural fields is rarely studied. Herein, low-interfacial toughness PDMS/SiO 2 coatings are prepared on aluminum plates. Field tests for anti-icing, icephobic, and large-scale deicing are conducted in the high-altitude regions of Southwest China. Fortunately, the PDMS/SiO 2 coating exhibits exceptional anti-icing and icephobic properties. The coating effectively delays the freezing of water droplets and natural ice accretion, significantly reducing icing weight and ice adhesion strength. During natural ice-covering processes, the ultra-low ice adhesion of the PDMS/SiO 2 coating aids in efficient ice shedding through wind and gravity and ensures rapid melting post-icing. Additionally, the PDMS/SiO 2 coating excels in large-scale deicing performance. The constant deicing force, governed by low interfacial toughness, provides robust assurance for efficient large-scale deicing of ice layers of varying sizes under gravity. Moreover, the coating demonstrates stable durability, retaining excellent deicing capabilities during icing/deicing cycles, UV radiation, and high-temperature aging tests. This study lays an experimental foundation for the further research and application of low-interfacial toughness materials.
研究领域:
材料科学
·
可再生能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Minkang Li,Lina Zhang,Zhongzheng Zhang,Jialin Shi,Yuefeng Liu,Jiansong Chen,Nannan Sun,Wei Wei
Integration of adequate activity, stability, and productivity in a catalyst is of strategical importance to achieve high performance, particularly for inactive reactants, e.g., CO2. Here, using a reversed microemulsion method, ultrafine metallic Ag nanoparticles coated with porous SiO2 can be facilely obtained using micelles as separated nanoreactors for the preparation. Such architectures allowed the rigid SiO2 matrices to act as physical spacers, so that aggregation of the Ag particles could be avoided. Meanwhile, due to the templating effect from the surfactant, large mesopores could be induced in the SiO2 shell, and thus the diffusion barrier of reactants could be minimized. When used as a heterogeneous catalyst for carboxylation of terminal alkynes by CO2 under mild conditions, the prepared xAg@SiO2 catalysts showed extraordinary performance in terms of excellent activity, stability, productivity, and wide substrate scope. The knowledge developed here may also enrich the toolbox for performance promotion of metal catalysts via specially fabricated structures.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 12
·3395
·
IF 5.076
Wei Zhang,Yanli Lu,Yang Zang,Jinhui Han,Qingyun Xiong,Jinping Xiong
In this study, a new method for synthesizing Ag-NaYF4:Yb3+/Er3+@ SiO2nanocomposites was introduced. Using a hydrothermal method, the synthesized Yb3+- and Er3+-codoped NaYF4up-conversion luminescent materials and Ag nanoparticles were doped into up-conversion nanomaterials and coated with SiO2up-conversion nanomaterials. This material is known as Ag-UCNPs@SiO2, it improves both the luminous intensity because of the doped Ag nanoparticles and has low cytotoxicity because of the SiO2coating. The morphology of UCNPs was observed using scanning electron microscopy (SEM), and the mapping confirmed the successful doping of Ag nanoparticles. Successful coating of SiO2was confirmed using transmission electron microscopy (TEM). Fluorescence spectra were used to compare changes in luminescence intensity before and after doping Ag nanoparticles. The reason for the increase in luminescence intensity after doping with Ag nanoparticles was simulated using first-principles calculations. The cytotoxicity of Ag-UCNPs@SiO2was tested via the cell counting kit-8 (CCK-8) method, and its imaging ability was characterized using the micro-CT method.Keywords:up-conversion;nanomaterials;CT imaging
研究领域:
生物医学工程
·
纳米技术
·
医学影像学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 23
·9698-9707
·
IF 4.5
Zhang Cong,Chen Yanan,Feng Shuangjiu,Kan Xucai,Zhu Yong,Li Yue,Sun Wei,Shen Jibiao,Liu Xiansong
Currently, soft magnetic composites (SMCs) are usually used for high-current power devices. As a kind of SMCs, the FeSiAl magnetic powder core exhibits excellent magnetic properties, but it is difficult to improve its permeability and DC-bias characteristics. Thus, developing SMC s with high permeability and lower power loss remains a challenge. Here, the FeSiAl powder was mixed with carbonyl iron powder (CIP) which coated with nano-SiO 2 and pressed into toroidal magnetic core with silicon resin as adhesive. For MHz frequency, the SMCs with excellent power loss, saturation magnetization and permeability were obtained. Saturation magnetization of the mixed powder increased markedly with the CIP content increasing. For magnetic powder cores, the SEM and the mappings show that the large deformation CIP was helpful to improve core density. With the addition of CIP, the permeability and DC-bias properties were improved. In addition, the power loss was greatly reduced by the optimized annealing temperature.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 11
·12017-12029
·
IF 3.056
Lv Yuancai,Huang Siyi,Huang Guofu,Liu Yifan,Yang Guifang,Lin Chunxiang,Xiao Gao,Wang Yonghao,Liu Minghua
Given their considerable solubility in water and potentially high toxicity to human health, organoarsenic compounds have become an emerging contaminant. Herein, a heterogeneous Fenton process mediated by SiO 2 -coated nano zero-valent iron (SiO 2 -nZVI) was employed to simultaneously remove the p -arsanilic acid ( p -ASA, a typical organoarsenic compound) and the released arsenic. The initial pH value significantly influenced on the degradation of p -ASA and at the optimal pH (3.0), p -ASA (10 mg L −1 ) could be completely oxidized to As(V), NH 4 + , and plentiful phenolic compounds such as phenol and p -hydroquinone via the cleavage of C–N and C–As bonds within 60 min in pure water. Meanwhile, although the formed lepidocrocite and magnetite on the surface of SiO 2 -nZVI significantly limited the reutilization, they played a vital role in the adsorption of the released As(V) and the residual arsenic levels in the effluent were as low as 0.031 mg L −1 , meeting both the drinking water standard of the World Health Organization (WHO) and the surface water standard of China (0.05 mg L −1 ). Furthermore, high-level dissolved organic matters (DOM) (> 2 mg C L −1 ) exhibited strong interference with both the oxidation of p -ASA and adsorption of arsenic, but the interference could be eliminated by increasing the SiO 2 -nZVI dosage or adding H 2 O 2 . Importantly, this system could completely remediate p -ASA in a short time and simultaneously avoid the secondary pollution caused by inorganic arsenic, which was significant for the remediation of organoarsenic pollutants in swine wastewater.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Wenyue Jiao,Zunyi Liu,Tianwen Huang,Lei Tan,Yan Hao,Yicheng Wang,Tingrui Lin,Hui Yang,Huazheng Sai
A superhydrophilic and underwater superoleophobic cellulose graft copolymer/SiO 2 coated metal mesh (CASi/M) was fabricated through a facile and cost-effective process. As-prepared CASi/M could separate different oil-water mixture with a separation efficiency higher than 99.4 % and a flux up to 26940 L·m −2 ·h −1 only driven by gravity. The reusability experiment showed that the separation efficiency still exceeded 99.2 % after 25 cycles, which displayed superior reusability. Furthermore, CASi/M displayed superior stability in corrosive liquids such as acidic, alkaline, and salty environments. This work provides new sights in the development of durable and low-cost functional materials for rapid and efficient oil/water separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Jie Liu,Jianqiang Liu,Chenglei Wang,Zhongwei Ge,Dali Wang,Lixin Xia,Liang Guo,Na Du,Xiaotao Hao,Hongdi Xiao
The surface passivation strategy is one of the effective ways to improve the power conversion efficiency (PCE) of quantum dots-sensitized solar cells (QDSSCs). In this work, a novel ZnS/SiO 2 coating serves as the passivation layers for the CdS/CdSe co-sensitized solar cells based on zinc titanium mixed metal oxides (MMOs) obtained from layered double hydroxides (LDHs) precursor. The incorporation of passivation layers effectively improved the performance of the corresponding CdS/CdSe quantum dots co-sensitized solar cells and the best PCE of 4.91% has been achieved, which represents an over 55% improvement than that of devices without passivation. The effects of ZnS/SiO 2 double passivation layers were systematically investigated, especially by 2D time-resolved fluorescence imaging and electrochemical impedance spectroscopy technique . It was revealed that the existence of ZnS/SiO 2 outer layers caused the suppression of charge recombination, higher electrons collection efficiency, and superior surface quality.
研究领域:
材料科学
·
能源技术
·
光电化学
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2023
·
IF 1.4
Yueyue Rui,Bingyan Yu,Yun Liu,Lihu Fu,Jie Liu,Gang Lu
Hydrophilic coatings were prepared by dip-coating bare glass in polyvinylpyrrolidone (PVP)/silicon dioxide (SiO2) or polyvinylpyrrolidone (PVP)/carboxybetaine acrylamide (CBAA) suspensions. The effects of surface wettability on the anti-fogging and anti-icing properties of the two coatings were investigated. The surface morphologies of the coatings were characterized by polarized light microscopy and laser confocal microscopy, and the hydrophilicity of the coatings depended on the binding capacity of the hydrophilic functional groups in the fillers with water. The wettability of the coating surface was characterized by contact angle measurements, and it improved with increasing filler content. The coatings with the addition of more than 80 wt % of SiO2 or 1 wt % of CBAA showed superhydrophilic behavior. The anti-fogging and anti-frosting test results showed that the two coatings successfully prevented the development of fog and frost. The anti-icing properties of the coatings were also characterized. At three different temperatures, the anti-icing performance of the CBAA coating was better than that of the SiO2 coating. For, instance, at −15 °C, the icing delay time of PVP/SiO2 coating was 306.7 s and that of PVP/CBAA coating was 630.0s. Thus, the icing time of the CBAA coating was 323.3s longer than that of the SiO2 coating. When less than 80 wt% SiO2 or 10 wt% CBAA was added, the coating had good transparency.
研究领域:
材料科学
·
表面工程
·
高分子科学
·
纳米技术
·
涂层技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）