JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Chaozhong Wu,Lingjiao Zhan,Haotian Liu,Juan Wang,Wensheng Liu,Shuwei Yao,Yunzhu Ma
Understanding the mechanism of the oriented growth in multi-component alumina-based fibers and inhibiting its progression is crucial for enhancing their thermal stability. In this study, a novel diphasic fiber composed of lamellar α-Al 2 O 3 and mosaic-like mullite grains was prepared. We discussed the oriented growth behavior of lamellar α-Al 2 O 3 grains and the diffusion phenomenon of the Al element in SiO 2 substrate under the combined addition of iron sol and La 2 O 3 , proposing a new mechanism for oriented growth in diphasic fibers. The diffusion of the Si element to the tips of alumina grains contributed to a significant increase in the mobility of non-basal planes, resulting in (0001) surface growth of α-Al 2 O 3 grains. Furthermore, the La segregation at grain boundaries significantly impeded the oriented growth of α-Al 2 O 3 grains, which was critical for improving the thermal stability of multiphase alumina-based fibers.
研究领域:
材料科学
·
陶瓷学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wanqiu Yang,Zhicheng Wang,Xudong Hu,Yingjun Chai,Gaoyu Liu,Shengli Zhang,Haibo Zeng,Xiaoming Li
Scintillator films with high light output and low cross-talk are essential for highly sensitive and high-resolution X-ray imaging applications. However, only specific scintillators prepared with high-cost method or pixelated template meet these demands. Solution processed strategies possess the merit of low-cost while scintillator particles are usually in chaos with severe light scattering, especially for thick films up to hundreds of microns, resulting in poor imaging sensitivity and resolution. Herein, we demonstrate that low-symmetrical zero-dimensional Cs 3 Cu 2 I 5 scintillator can grow longitudinally with spray-coating strategy with the assistance of crystal facet inhibitor. The additive, triallyl isocyanurate, exhibits preferred crystal face binding ability, inducing oriented growth and well-defined columnar structure with large thickness more than one hundred microns. The final scintillator films show higher luminescence polarity and light output, contributing to remarkable improvement in light yield and imaging resolution of 71% and 81% compared with the control sample, respectively. Besides, the added monomer crosslinks under annealing and provide robust protection, leading to excellent radiation hardness and storage stability under ambient environment. By virtue of the negligible afterglow, artifact-free X-ray imaging at a frame rate of 3840 fps is fulfilled, indicating the promising prospects of this strategy for application in low-cost, high-performance fast X-ray imaging.
研究领域:
材料科学
·
医学影像
·
光学
✓ 已验证
产品关联
DOI
高影响因子
POWDER DIFFRACTION
·
2018
·Vol. 33
·期 2
·115-120
·
IF 0.519
Jing Wu,Jikang Jian,Shufang Wang,Shuang Guo,Renbo Lei,Haitao Liu
The Bi4Te3 films with well-ordered orientation and microstructure were successfully prepared on SiO2 substrate by a vacuum thermal evaporation deposition technique for the first time. We discussed the effects of evaporation temperature and substrate temperature on the phase and its well-ordered growth of Bi4Te3 films. The formation of Bi4Te3 phase is owing to the differences of the saturated vapor pressure. The thermoelectric transport properties of the Bi4Te3 films were investigated and the (00l)-oriented nanopillars array film has a better electrical transport performance, whose value of PF is 0.032 mWm−1 K−2 at 339 K, approaching twice that of the non-oriented ordinary film. The enhanced electrical properties of Bi4Te3 films could be achieved via the high-crystallinity well-controlled (00l)-oriented nanopillars array.
研究领域:
材料科学
·
热电材料
·
薄膜制备技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Ceramics
·
2020
·Vol. 9
·期 6
·693-702
·
IF 2.889
Xu Jie,Lu Qiling,Lin Jinfeng,Lin Cong,Zheng Xinghua,Lin Tengfei,Wu Xiao
Er 3+ -doped Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 O 3 ( x Er-BCTZ, x = 0, 0.005, 0.01, 0.015) multifunctional thick films were prepared by the tape-casting method, using sol-gel-derived nano-sized powders as the matrix material. The surface morphologies, photoluminescence, and electrical properties were investigated. Dense microstructures with pure perovskite structure were obtained in the thick films. By doping an appropriate amount of Er 3− , the samples exhibit superior up-conversion photoluminescence performance and simultaneously enhanced electrical performances. In addition, relatively higher texture fractions (with the largest value of 83.5%) were realized through introducing plate-like BaTiO 3 templates to make the thick film grow by the [001] c orientation. And the ferro-/piezoelectric properties of the thick films were further improved, showing potential in the applications of micro-optoelectronic devices.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Chunxin Jin,Shuai Liu,Xiaofang Chen,Yanhong Li,Jürgen Caro,Aisheng Huang
Optimal orientation is the key factor to optimize the gas separation performance of metal-organic framework (MOF) membranes. However, it is still greatly challenging to prepare large-area oriented MOF membranes for industrial applications. Herein, we prepared compact and (100) oriented zeolitic-imidazolate framework-8 (ZIF-8) membranes with membrane area up to 500 cm 2 on the graphite substrate via support-induced strategy within 2 h. With membrane thickness of only 620 nm, the (100) oriented ZIF-8 membranes exhibit high gas separation performances due to the reduction of inter-crystalline defects and permeation resistance. At 100 °C and 1 bar, the separation factors of H 2 /CO 2 , H 2 /CH 4 and H 2 /C 3 H 8 are 18.5, 58.2 and 101.6, respectively, with H 2 permeance of about 160 x 10 −9 mol m −2 s −1 ·Pa −1 . The different positions of the 500 cm 2 ZIF-8 membrane show complete consistency in orientation and separation performance, recommending this membrane suitable for future industrial applications. Further, also oriented ZIF-67 and MOF-303 membranes can be consistently prepared by this strategy, confirming its versatility for the preparation of large-area MOF membranes.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Guojuan Hai,Jianfeng Huang,Yanni Jie,Liyun Cao,Long Wang,Changle Fu,Ting Xiao,Mengfan Niu,Liangliang Feng
Crystal facets-orientation growth plays a crucial role in determining photocatalytic performance. Herein, a series of (010) facets-oriented W 18 O 49 nanowires were controllably synthesized by a facile solvothermal alcoholysis method using octadecylamine as the crystal growth capping agent in order to regulate the specific growth behavior and unveil its correlation with photocatalytic performance. The properties of the prepared W 18 O 49 nanowires, such as surface oxygen vacancies , light absorption and the band gap size, as well as the surface charge carriers separation rate, could be well-modulated via tailoring the preferred orientation growth. The W 18 O 49 nanowire with the strongest (010)-faceted orientation demonstrated the best photocatalytic degradation of Methyl Orange under ultraviolet light irradiation (up to 100% within 15 min) and visible light irradiation (up to 91% within 95 min). These interesting findings not only help us to gain an in-depth understanding of the relationship between the preferred orientation growth and the photocatalytic performance but also have the potential to open up an innovative route/protocols for the preparation of crystal facets-oriented metal oxides for highly efficient photocatalysis .
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Hanyu Wang,Wenjing Zou,Yukun Ouyang,Hu Luo,Xingchong Liu,Haimin Li,Yue Lei,Yafei Ni,Yu Fu,Ding Zheng
The uncoordinated Pb 2+ and X - vacancy defects caused by the uncontrollable crystallization process are detrimental to the efficiency and stability of perovskite solar cells (PSCs). Herein, a multifunctional ionic liquid 1-butyl-3-methylimidazolium hexafluoroan (BMIMSbF 6 ) is introduced into perovskite to form an intermediate phase to induce crystal-oriented growth and passivate intrinsic defects. The results demonstrate that PbI 2 ·BMIMSbF 6 intermediate phase can delay the crystallization rate through molecular exchange and induce the crystal-oriented growth of perovskites. Moreover, by passivating uncoordinated Pb 2+ and X - vacancy defects, BMIMSbF 6 promotes the grain coarsening of perovskite and inhibits the grain boundary migration with an Urbach energy decreased by 10 meV. As a result, the PSCs with the BMIMSbF 6 additive achieves a champion power conversion efficiency (PCE) of 22.03% and improved long-term stability. In addition to comprehensively controlling the growth of perovskite, the chemically stable BMIMSbF 6 could prevent water infiltration to protect the perovskite and enhance its humidity stability. Thus, the PSCs with BMIMSbF 6 additive maintains 85% of its initial PCE after aging at 45% relative humidity for 500 h. This work highlights the multifunctional roles of BMIMSbF 6 to induce crystal-oriented growth, passivate intrinsic defects, and enhance humidity stability to form efficient and stable PSCs.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Shenzhen Cong,Si Sun,Yijing Zhang,Ming Wang,Zhehua Jia,Youhua Zhao,Huan Pang
Metal–organic framework (MOF) membranes offer a wide range of applications, including simultaneous hydrogen generation and decarbonization. The permselectivity of gas molecules can be considerably increased by optimizing the oriented of MOF membranes, and it is possible to construct MOF membranes with high permeance and high selectivity. Here, chelation-assisted interfacial growth is used to prepare ZIF-L membranes for H 2 /CO 2 separation. The growth rate of the ZIF-L crystal plane is regulated by optimizing the interface Zn 2+ diffusion, and a ZIF-L membrane with preferred orientation is constructed for efficient separation of H 2 /CO 2 . The optimized ZIF-L membrane has an H 2 permeance of over 2000 GPU, and the H 2 /CO 2 selectivity exceeds 30. Additionally, the prepared ZIF-L membrane exhibits outstanding operating stability and tolerance, making it a promising candidate for industrial applications.
研究领域:
材料科学
·
化学工程
·
膜技术
·
气体分离
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2019
·Vol. 10
·期 1
·1901566
·
IF 24.884
Ning Zhou,Bolong Huang,Mingzi Sun,Yu Zhang,Liang Li,Yingzhuo Lun,Xueyun Wang,Jiawang Hong,Qi Chen,Huanping Zhou
Organic spacer cations in layered 2D (A 1 ) 2 (A 2 ) n −1 B n X 3 n +1 (where A 1 is an organic cation acting as a spacer between the perovskite layers, A 2 is a monovalent cation, e.g., Cs + ,CH 3 NH 3 + , CH(NH 2 ) 2 + ) perovskite materials improve the long-term stability of the resulting solar cells, but hamper their power conversion efficiency due to poor carrier generation/transportation. Rational guidelines are thus required to enable the design of organic spacer cations. Herein, mixed A 1 cations are employed in layered 2D perovskites to investigate the interplay between alkylamine cations and unsaturated alkylamine cations. It is revealed that alkylamine spacer cations are able to facilitate precursor assembly, which results in the orientated growth of perovskite crystals. Unsaturated alkylamine cations further lead to reduced exciton binding energy, which improves carrier pathway in the 2D perovskites. By mixing both cations, substantially improved open circuit voltage is observed in the resultant photovoltaic cells with the efficiency of 15.46%, one of the highest one based on (A 1 ) 2 (A 2 ) 3 Pb 4 I 13 layered 2D perovskites. The generality of the design principle is further extended to other cation combinations.
研究领域:
材料科学
·
光伏技术
·
纳米结构材料
·
半导体物理
·
能源化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）