CHEMOSPHERE
·
2023
·
IF 8.8
Yansong Ma,Biao Ma,Di Wu,Jun Wang,Yang Li,Xiaobin Fan,Qing Xia,Fengbao Zhang,Wenchao Peng
Perovskite materials are reported to be effective in peroxymonosulfate (PMS) based Fenton-like reactions, the leaching rates of chalcogenide materials in perovskite materials are however serious, thus leading to bad performance in long-term stability. In this study, an O-doped MoS 2 is synthesized to composite with LaCoO 3 , and the high catalytic activity of LaCoO 3 is well preserved with greatly decreased Co leaching. During the BPA degradation with PMS as oxidant, ∼100% degradation can be achieved in 20 min and this degradation efficiency can be maintained for ∼45 h in a simulated fixed bed reactor, which is almost 3 times longer than the pure LaCoO 3 . With the compositing of O-doped MoS 2 , the leached Co was greatly decreased and the dominated reactive oxidation species (ROS) transformed from SO 4 •– into O 2 •– with longer lifespan, thus resulting in the better stability. This study could promote the application of perovskite materials in the real industrial wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Matter
·
2020
·
IF 0
Yucheng Liu,Zhuo Xu,Zhou Yang,Yunxia Zhang,Jian Cui,Yihui He,Haochen Ye,Kui Zhao,Huaming Sun,Rui Lu,Ming Liu,Mercouri G. Kanatzidis,Shengzhong (Frank) Liu
Summary Ion migration in perovskite materials accelerates its decomposition—deteriorating device performance, causing baseline drift, and lowering imaging resolution. In particular, in X-ray detectors, the effect of ion migration is more obvious under the necessary high working bias. Here, we report an effective strategy to grow superior inch-sized, high-quality, zero-dimensional (0D)-structured, lead-free (CH 3 NH 3 ) 3 Bi 2 I 9 perovskite single crystals. These crystals have significantly lower ion migration, reduced dark current, and better environmental stability compared with other perovskites, enabling us to fabricate a type of 0D-structured perovskite X-ray detector. The X-ray detector shows high sensitivity of 1,947 μC Gy air −1 cm −2 , low detection limit of 83 nGy air s −1 , short response time of 23.3 ms, the lowest baseline drift of 5.0 × 10 −10 nA cm −1 s −1 V −1 , and the best long-term stability among all perovskites reported. The combination of large crystal size and excellent X-ray response allows us to fabricate the first 0D-structured perovskite X-ray imaging system.
研究领域:
材料科学
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医学成像
·
辐射检测
✓ 已验证
DOI
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 20
·7162-7168
·
IF 5.7
Zhenghao He,Zhiqiang Bao,Xiaoyang Guo,Ying Lv,Tienan Wang,Yuejia Ma,Xingyuan Liu
Transparent displays are one of the development directions of future displays, and have great application potential in smart windows, wearable electronic products, virtual reality technology, touch screens and other fields. Perovskite materials have high fluorescence quantum efficiency and high color purity, which make a thin luminous layer achieve high device performance, making us foresee their potential application in the field of transparent displays in the future. However, due to the limitations of the modulation of the luminescent layer and top transparent electrodes, the performance of transparent perovskite light-emitting diodes (TPeLEDs) still has a certain gap compared to the traditional perovskite light-emitting diodes (PeLEDs). In this work, the first blue emitted TPeLEDs were prepared by using quasi two-dimensional perovskite materials and multilayer transparent top electrodes. By designing and optimizing the performance of the luminescent layer and the structure of the top transparent electrode, the transmittance and device efficiency of TPeLEDs were enhanced. The best TPeLED shows a maximum transmittance of nearly 70%, and displays a maximum brightness of 2294 cd m−2 and a maximum external quantum efficiency (EQE) of 11.73%.
研究领域:
材料科学
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光学工程
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
The Innovation
·
2024
·
IF 33.2
Hang Yin,Jincong Pang,Shan Zhao,Haodi Wu,Zihao Song,Xing Li,Zhiping Zheng,Ling Xu,Jiang Tang,Guangda Niu
X-ray detection is crucial across various sectors, but traditional techniques face challenges such as inefficient data transmission, redundant sensing, high power consumption, and complexity. The innovative idea of a retinomorphic X-ray detector shows great potential. However, its implementation has been hindered by the absence of active layers capable of both detecting X-rays and serving as memory storage. In response to this critical gap, our study integrates hybrid perovskite with hydrion-conductive organic cations to develop a groundbreaking retinomorphic X-ray detector. This novel device stands at the nexus of technological innovation, utilizing X-ray detection, memory, and preprocessing capabilities within a single hardware platform. The core mechanism underlying this innovation lies in the transport of electrons and holes within the metal halide octahedral frameworks, enabling precise X-ray detection. Concurrently, the hydrion movement through organic cations endows the device with short-term resistive memory, facilitating rapid data processing and retrieval. Notably, our retinomorphic X-ray detector boasts an array of formidable features, including reconfigurable short-term memory, a linear response curve, and an extended retention time. In practical terms, this translates into the efficient capture of motion projections with minimal redundant data, achieving a compression ratio of 18.06% and an impressive recognition accuracy of up to 98.6%. In essence, our prototype represents a paradigm shift in X-ray detection technology. With its transformative capabilities, this retinomorphic hardware is poised to revolutionize the existing X-ray detection landscape.
研究领域:
材料科学
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医学影像
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电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2022
·
IF 18.027
Kunnathodi Vighnesh,Shixun Wang,Haochen Liu,Andrey L. Rogach
All-inorganic cesium lead bromide (CsPbBr3) nanocrystals are one of the prominent members of the metal halide perovskite family of semiconductor materials, which possess considerable stability and excellent optoelectronic properties leading to a multitude of their potential applications in solar cells, light-emitting devices, photodetectors, and lasers. Hot-injection strategy is a popular method used to synthesize CsPbBr3 nanocrystals, which provides a convenient route to produce them in the shape of rather monodisperse nanocubes. As in any synthetic procedure, there are different factors like temperature, surface ligands, precursor concentration, as well as necessary postpreparation purification steps. Herein, we provide a comprehensive hot-injection synthesis protocol for CsPbBr3 nanocrystals, outlining intrinsic and extrinsic factors that affect its reproducibility and elucidating in detail the precursor solution preparation, nanocrystal formation and growth, and postpreparative purification and storage conditions to allow for the fabrication of high-quality green-emitting material.
研究领域:
材料科学
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化学工程
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光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yuang Chen,Yang Zou,Lili Zhao,Zijian Lei,Nan Wang,Lixin Song
Laser stealth and laser protection are a contradictory due to the opposite requirement in reflectivity. Introducing nonequilibrium surface oxygen vacancy into high-reflectivity materials is a method to compatibly realize laser stealth and laser protection. Herein, nonequilibrium surface oxygen vacancy is introduced into the titanium-based perovskite materials (CaTiO 3 , SrTiO 3 , BaTiO 3 ) producing high-absorption materials with reflectivity below 10%, and the materials possess an optical transformation property. The distribution of the oxygen vacancy is characterized by TEM and EELS, and a core-shell structure is observed, with a disordered shell covering a crystalline core. Under laser irradiation, the materials can transform to high-reflectivity state and reflect most of the laser energy to prevent laser damage. Among these materials, BaTiO 3 possesses the fastest transformation rate of 2000 ms and the highest reflectivity of 70%, which is ascribed to the low thickness of the disordered shell and the fast diffusion coefficient of the oxygen atom.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Zhongyuan Li,Mengdi Xu,Wuqi Liu,Xuesong Wang,Ye Li,Xianju Zhou,Zhen Fang,Lixin Ning
Broadband near-infrared (NIR) luminescent materials hold the key to next-generation, smart, NIR light sources. The emerging halide perovskite materials are regarded as promising candidates for optoelectronics because of their superior optical properties and easy solution processability. However, it remains a major challenge to realize efficient and thermally stable broadband NIR luminescence in these materials. Herein, we report a novel strategy to achieve broadband NIR luminescence by utilizing the transitions from the lowest 1T2 level of Mo4+ to the components of its 3T1 ground state in the soft Cs2Zr(Cl,Br)6 lattice. The multiple transitions, each occurring within the (4d2) t22 crystal-field configuration and containing zero-phonon and vibronic contributions, superimpose on each other to generate the broadband NIR emission. The emission spectrum encompasses the long wavelength region from 800 to 1400 nm centered at 970 nm with a full width at half-maximum of 170 nm. More importantly, the title NIR phosphor shows an exceptional quantum efficiency (66.9%) and thermal stability (67%@150 °C). The as-fabricated NIR phosphor-converted light-emitting diode shows great potential as an NIR lighting source. This research opens a new horizon for realizing high-performance broadband NIR luminescence by exploiting multiple electronic transitions of activators in the soft lattice.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Peipei Liu,Jiang Liu,Shuang Cheng,Weizi Cai,Fangyong Yu,Yapeng Zhang,Peng Wu,Meilin Liu
Supercapacitors have potential for many emerging energy storage applications because of their excellent power density and long cycling stability. However, their applicability is often limited by the relatively low energy density. Here we report our findings in design, fabrication, and testing of a composite electrode composed of Ag nanoparticles grown directly on a porous perovskite-type material La 0.7 Sr 0.3 CoO 3−δ (LSC) substrate. When tested in KOH aqueous electrolyte, the electrode (with a high mass loading of Ag nanoparticles of 28.6 mg cm −2 ) demonstrates an areal capacity of 14.8 F cm −2 (specific capacitance of 517.5 F g −1 and volumetric capacitance of 262.5 F cm −3 ) at 1 mA cm −2 , while maintaining outstanding cycle stability (85.6% retention after 3000 cycles at 50 mA cm −2 ). An asymmetric supercapacitor (Ag/LSC//carbon cloth) with a wide voltage of 1.8 V displays a high energy density of 21.9 mWh cm −3 and an excellent stability. The superior capacitive performance can be ascribed to the porous, conductive and stable LSC framework, the uniform distribution and high mass loading of Ag nanoparticles on LSC, and the effective unitization of redox process.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Dan Yu,Jiahong He,Taiping Xie,Qiang Xu,Quanxi Zhu,Jun Yang,Jibin An,Feng Ye,Jiankang Wang,Bin Xiang
It is of significant to explore activation mechanism of peroxymonosulfate (PMS) for development of more active and robust metal oxide catalyst. Here, we discover a key role of Sr-O bond in boosting the catalytic activity of SrCo 0.81 Fe 0.19 O 2.78 perovskite. In this catalytic system, oxygen vacancy, Fe 4+ /Fe 3+ , and Co 3+ /Co 2+ redox cycles synergistically enhanced catalytic activity of SrCo 0.81 Fe 0.19 O 2.78 for antibiotic degradation with 100 % Florfenicol (FF) removal in 27 min. Moreover, this catalyst presented excellent stability although oxygen vacancy had a decrease after reuse. The influential factors including coexisting anions on FF degradation were systematically studied. Comparative experiments and theoretical calculation indicate Sr-O ionic bond provides electrons for Co-O and Fe-O covalent bonds to accelerate Fe 4+ /Fe 3+ , and Co 3+ /Co 2+ redox cycles for PMS activation . Finally, the FF degradation pathway over SrCoFe perovskite/PMS system was identified by LC-MS/MS.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xianzhong Shi,Chunyuan Hou,Shidong Wang,Baochen Wang
Double perovskite materials exhibit great potential in optoelectronic applications due to their unique structure and excellent properties, with luminescence intensity enhancement being a major focus in luminescent material research. In this study, we report the passivation of double perovskite Cs 2 AgBi 0.2 In 0.8 Cl 6 using dimethyl sulfoxide (DMSO) as a passivating agent, achieving a significant enhancement in luminescence intensity. We observed increased luminescence intensity and prolonged fluorescence lifetime in the samples. Our study shows that when using DMSO as a passivator, S element in DMSO will combine with the surface metal ions (Ag + , In 3+ , or Bi 3+ ) of the samples to form ligand bonds and fill the surface Cl vacancies, thereby eliminating the surface defect states and suppressing non-radiative recombination. This promotes radiative recombination pathways. Consequently, the fluorescence lifetime is prolonged and the luminescence intensity is increased. Our work provides a feasible strategy for boosting luminescence in double perovskite materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Bin Zhu,Xin He,Lingze Liu,Jinglin Liu,Xiaomin Zhang,Ben W.-L. Jang
Perovskite is one of the most promising materials for catalytic oxidation of volatile organic compounds (VOCs) because of its special tunable structure and properties as well as high stability. However, it commonly suffers from relatively low catalytic activity due to the low specific surface area and limited numbers of active sites caused by high synthesis temperature required. To improve the reactivity of the perovskite catalyst, a promising strategy is to construct highly dispersed noble metal sites on surfaces perovskite. However, generating highly active metallic sites while exhibiting good thermal stability remains a formidable challenge. Here, it’s demonstrated that the construction of highly efficient and robust platinum (Pt) sites on La 0.8 Sr 0.2 MnO 3-δ (Pt/LSMO) for toluene oxidation resulted in an almost three-fold increase in toluene conversion with a good stability. The key to the construction of these Pt sites is treating the oxidized Pt species on LSMO with hydrogen (H 2 ) plasma at low temperatures, which leads to the formation of high metallic Pt (Pt 0 ), ultrasmall Pt nanoparticles (∼1.3 nm), and high concentration of oxygen vacancy (O v ). These features facilitate the generation of a large number of highly active and stable Pt 0 -Mn 3+ -O v sites on Pt/LSMO, which contribute to the activation of toluene and oxygen species and, therefore, the catalytic reaction. This investigation demonstrates a promising approach of using the cold plasma technique to design and construct high-performing noble-based perovskite catalysts for toluene oxidation.
研究领域:
催化化学
·
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 31
·期 4
·6511-6526
·
IF 5.8
Huang Likun,Wang Huixian,Wang Guangzhi,Mu Deying,Hou Yue,Di Xinyi,Zhou Simin,Wang Dongdong,Wang Dandan
The degradation of cellulosic ethanol wastewater by peroxymonosulfate (PMS) is one of the important methods to solve the environmental problems caused by it. In order to improve the degradation efficiency of cellulosic ethanol wastewater, the design of more catalytically active and stable chalcogenide catalysts has become a problem that needs to be solved nowadays. The application of foreign cations to replace the A- or B-site to increase the oxygen vacancy of the chalcocite catalyst to improve the efficiency of chalcocite catalytic degradation of wastewater has received much attention. In this work, the perovskite material LaCuO 3 was synthesized using a citric acid-sol–gel method, and the novel material La 1-x Sr x CuO 3 was prepared by doping of Sr element at the A position. In order to prepare catalytic materials with better performance, this study carried out performance-optimized degradation experiments on the prepared materials and determined that the catalytic efficiency of La 0.5 Sr 0.5 CuO 3 prepared under the conditions of the complexing agent dosage of 1:2, the gel temperature of 80 °C, and the calcination temperature of 700 °C was better than that of the catalytic materials prepared under other conditions. The prepared material has good recycling function; after four times recycling, the removal rate of pollutant COD is still more than 85%. This work provides a new synthesis method of perovskite material with good recycling function and high catalytic efficiency for the degradation technology of cellulosic ethanol wastewater. Graphical Abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）