Nano Energy
·
2024
·
IF 16.8
Kuan Cai,Huancheng Huang,Yanhao Xu,Xin Wang,Pinle Zhang,Fanchao Yu,Junyu Chen,Yunxia Bai,Shuangxi Nie,Shuangfei Wang,Hainong Song,Xinliang Liu
Piezocatalysis has wide applications in the field of pollutant treatment. However, the catalytic activity of single piezocatalysts is limited. Constructing heterojunctions can effectively enhance its charge carrier transfer capability. In this work, Cu I /Cu II @BaTiO 3 composites with different Cu I /Cu II ratios were synthesized. A high reaction rate constant of 0.0886 min -1 in the Cu I /Cu II @BaTiO 3 (1:0.3) is obtained, which is 2.54 times than that of BaTiO 3 and superior to other lead-free perovskites-based composites. The multivalent heterogeneous interfaces form different potential gradient regions, which enhance the efficient generation of superoxide radicals (•O 2 - ), reaching approximately 2.01 times the yield of pure BaTiO 3 . In addition, the Cu I /Cu II structure serves as an active site for •O 2 - , facilitating the in-situ generation of hydrogen peroxide (H 2 O 2 ) and triggering a Fenton-like reaction to produce hydroxyl radicals (•OH). This study provides valuable insights for the design of multi-valent heterostructure piezocatalysts for wastewater treatment applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Results in Physics
·
2021
·
IF 4.476
Shutong Hao,Xiaolin Liu,Mu Gu,Jiajie Zhu
γ-CuI is a promising scintillator owing to the ultrafast decay time of 130 ps contributed by the near-band-edge emission. The luminescence properties of the γ-CuI are directly related to its intrinsic defects, such as Cu and I vacancies. In this context, tuning the intrinsic defects by cation and anion doping was proposed to improve the scintillation performance of γ-CuI. The structural properties of the dopants, including Li, Na, Mg, F, Cl and Br, were investigated by first-principles calculations. The Li, Na and Mg atoms were calculated to occupy the Cu site. The Cl and Br atoms turned out to replace the I atoms. Importantly, the Cu vacancies were created by Cl and Br dopants, and the I vacancies were eliminated through Li, Na, Mg, Cl and Br doping. These theoretical results were demonstrated by photoluminescence and X-ray excited luminescence spectra.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2021
·
IF 3.627
Beibei Shi,Jinbiao Jia,Xu Feng,Guangcai Ma,Yangqing Wu,Bingqiang Cao
CuI, as a promising hole transport material, possesses high hole mobility and is compatible with perovskite materials about band structure. Herein, CuI hole transport films are first fabricated by vacuum thermal evaporation procedure for n-i-p perovskite solar cell . The results show that vacuum thermal evaporated CuI films have no obvious influence on perovskite underlayer and 200 nm thick CuI film has the best carrier extraction ability. To further improve the stability of the device, reduced graphene oxides are introduced to avoid the accelerated attenuation caused by the reaction of CuI with Au. Finally, the power conversion efficiency of the dual-modified device improves to 8.69%, with the short circuit current density of 18.86 mA cm −2 , the open circuit voltage of 0.832 V and the filling factor of 0.550. The work demonstrates a potential application of vacuum thermal evaporated CuI films in organic-inorganic hybrid perovskite solar cells.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 13
·9072-9079
·
IF 3.9
Ruibin Xue,Gang Gao,Lei Yang,Liangge Xu,Yumin Zhang,Jiaqi Zhu
CuI films present promising optoelectronic properties for transparent conductors. However, the high hole concentration in CuI films hinders the controllable modulation of hole mobility, limiting their application in low-dimensional thin-film transistors. In this study, CuI films were prepared through a Cu film iodination method at room temperature, and a systematic investigation was conducted on the modulation of hole concentration and mobility with varying film thickness. The films exhibited a zinc blende structure (γ-phase) with increasing grain size as the thickness increased. The transmittance and optical bandgap of the films decreased with increasing thickness. The correlation of vacancy concentration with changing film thickness was analyzed through photoluminescence spectroscopy, revealing the influence of grain boundary migration on vacancy formation. The reduction in film thickness diminishes the migration of CuI grain boundaries, consequently reducing the probability of Cu vacancy and I vacancy formation, resulting in diminished hole concentration and enhanced hole mobility and film conductivity. The film with a thickness of 20 nm demonstrated optimal performance, with a transmittance of 90%, hole concentration of 4.09 × 1017 cm−3, hole mobility of 506.50 cm2 V−1 s−1, and conductivity of 33.19 S cm−1. This work deepens the understanding of hole transport such as hole concentration and mobility modulation in CuI films, highlighting the importance of controlling grain boundary migration during the film growth process.
研究领域:
材料科学
·
光学
·
半导体物理
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Maosheng Chen,Chenyu Ye,Chengqin Dai,Ruixiang Li,Ruijuan Qi,Chunhua Luo,Hui Peng,Hechun Lin
Low-cost and eco-friendly CuI hybrid compounds with various structures have recently attracted increasing attention due to their excellent optical properties and promising phosphor applications. However, the poor solubility and solution processability of bulk powders with agglomerated particle limited their practical applications greatly. In this work, we reported the self-assembly formation of CuI hybrid micron phosphors via the aqueous PVP micelle-assisted assembly route. Seven CuI hybrid micron phosphors with the emission from blue 450 nm to red 636 nm have been successfully synthesized. Among them, CuI-pyridine hybrid micron phosphors can be obtained via the reaction of CuI with various pyridines. PVP limits the size growth of the phosphors efficiently and it also plays an important role in controlling the distinct crystal phase formation. Whereas, micron phosphors based on bidentate ligands including 2-propylpyrazine, 5-bromopyrimidine or 4,4′-bipyridine need to be prepared via ligand exchange reaction. The micron phosphors present excellent stability in water and can be dispersed in the aqueous solution of PVP or PVA to form homogenous luminescent composites. The luminescent composites based on PVP are easy to use for fabricating anti-counterfeiting patterns via brush-painting or screen-printing. On the other hand, PVA composites can be applied for preparing free standing monochromatic or multichromatic emitting films as color convertor for display backlight. The PVA composites also exhibit the promising phosphor application for light-emitting diode (LED). Especially, the white LED can be directly realized via optimizing the mixing ratio of blue and orange phosphors.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Li You,Jianxin Cao,Fei Liu
A novel microchannel synthesis route for continuous synthesis of nanosized copper iodide (γ-CuI) using hydrated hydrazine as reducing agent was proposed. We continuously produced γ-CuI spherical nanoparticles in 99% yield and grain size of ca. 44–100 nm. Furthermore, the utilization of hydrated hydrazine was essential in precluding powder plugging the microchannel by self-generated N2. The microreaction process conditions, such as residence time, pH value, temperature, and reactant concentration, had great impact on the crystal phase and grain size. The optical properties analysis showed that red-shift in band age and emission intensity of photoluminescence spectra at 428 nm decreased with decreasing grain size. Moreover, the nanosized spherical γ-CuI exhibits enhanced photocatalytic performance in the photodegradation of methylene blue and methyl orange.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yongfeng Zhang,Ruiheng Zhou,Ruiliang Xu,Lulei Fang,Jingran Zhou,Yu Chen,Shengping Ruan
An ultraviolet (UV) photodetector (PD) is an indispensable element in the field of optoelectronics. However, the current PDs often need high driving voltages, which hinder the continued development of the devices. P–n junctions have been used in the construction of self-powered UVPDs. In this work, we fabricated a self-powered UVPD based on the CuI/TiO2 nanostructured film. To investigate the effects of the 80 nm thick CuI film on the device performance, we compared the performance of UVPDs based on the CuI/TiO2 film and TiO2 film. Compared with the TiO2 PD, the CuI/TiO2 PD showed self-powered performance with an on–off ratio of 103 and a peak responsivity of 28 mA W–1 at 330 nm. It is worth noting that the CuI/TiO2 device demonstrated a fast photo-response time of 35 ms and a decay time of 40 ms. The uniform CuI-nanostructured film spin-coated on the TiO2 film constructs a built-in field with the TiO2 film to separate the photogenerated carriers and transport them to both sides of the CuI/TiO2 nanostructured heterojunction, which is the main reason for the self-powered performance of the CuI/TiO2 UVPD. These results provide a feasible means for the development of heterojunction self-powered UVPDs.
研究领域:
材料科学
·
光电技术
·
纳米科技
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Xiaoxuan Guo,Fenglei Zhang,Yaseen Muhammad,Zhixiu Yang,Ruiping Wei,Lijing Gao,Guomin Xiao
The conversion of CO 2 into high value-added chemicals through efficient catalysis is an ideal strategy to reduce atmospheric CO 2 pollution and achieve carbon neutrality . Therefore, amino-functionalized organic polymer Cu@Co-PIL-N 4 loaded with highly dispersed CuI as a novel catalyst was developed. The functionalization of the surface and the high dispersion of the active phase integrate CO 2 capture and conversion into one catalytic system. The locally enriched CO 2 is converted to the easily activated carbon-oxygen negative ion by the action of primary or secondary amines. Thus, it is easier to achieve efficient preparation of α-alkylidene cyclic carbonates (STY = 20.8 h −1 ) by CO 2 carboxylative cyclization under mild conditions (25 °C, CO 2 pressure of 1 bar). The addition of a small amount of water to the cyclization system boosted domino reaction to convert the α-alkylidene cyclic carbonates to α-hydroxy ketones. The domino reaction also exhibited efficient catalytic activity and outstanding regioselectivity. In addition, the Cu@Co-PIL-N 4 catalyst exhibited excellent substrate expansion and cyclic regeneration for both reactions. This work promises great significance for further developing cost-effective and high-performance catalysts for the chemical conversion of CO 2 .
研究领域:
化学工程
·
催化科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2018
·
IF 1.703
Kuan-Guan Liu,Ru Wang,Hong-Yan Han,Qi-De Shan,Jing Nie,Xiao-Wei Yan
Incorporating ferrocenecarboxylato(-1) into [CuI
2(μ-dppm)2]2+ (dppm = bis(diphenylphosphino)methane) led to the isolation of a heterometallic complex [Cu2(μ2-η1,η1dppm)2(μ2-η1, η1FcCOO)(CH3CN)]BF4·CH3CN (1). It was characterized by infrared spectroscopy (IR), elemental analysis (EA), powder X-ray diffraction analysis (PXRD), ultraviolet–visible spectrum (UV–Vis), nuclear magnetic resonance (NMR), and thermogravimetric analysis (TGA). Single-crystal X-ray structural analysis revealed that ferrocenecarboxylato(-1) coordinated to the [Cu2(μ2-η1,η1dppm)2]2+ unit via μ2-η1,η1 bridging mode in 1. The title complex shows good optical absorption and thermal stability, and reliable electrochemical stability. Moreover, this heterometallic copper(I) complex could be used as a promising electrochemical sensing material for the detection of H2O2.
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
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
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Yanting Li,Pengfei Zhao,Jie Lao,Chunli Jiang,Bobo Tian,Chunhua Luo,Hechun Lin,Chang Yang,Hui Peng,Chun-Gang Duan
Fabricating devices with functions of biosynapses is one of attractive highlights in the field of artificial intelligence. Optoelectronic synapses are believed to be an important cornerstone of neuromorphic intelligent systems because they can directly process visual input signals. In this work, a transparent and metal-electrode-free optoelectronic synapse with a structure of CuI/ITO is prepared, in which the CuI layer acts as both an active layer and electrode. Some basic functions of biosynapses are realized by this device, including paired-pulse facilitation (PPF), spike-number-dependent plasticity (SNDP), spike-width-dependent plasticity (SWDP), and ″learning-experience″ behavior. Furthermore, this device exhibits the capability of detecting and processing the integrated optical information, and image recognition and memory. This work illustrates the great application potential of CuI in transparent optoelectronic synapse due to its unique properties.
研究领域:
人工智能
·
神经形态计算
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 46
·7582-7589
·
IF 3.304
Misbah Ullah Khan,Hongjun You,Dongjie Zhang,Lingling Zhang,Jixiang Fang
The construction of active nanomaterials on the surface of electrodes is very useful to boost electrochemical properties. Recently, great focus has been given to obtain immensely sensitive and selective glucose biosensors. This study demonstrates the well-controlled synthesis of non-symmetric two dimensional CuI nanoplates via a facile one-pot method in aqueous solution. On one side, the surface of the uniform non-symmetrical CuI nanoplates is covered with teeth-like tips, and on the other side the surface is flat and smooth. The non-symmetrical CuI nanoplate displays very high sensitivity properties in structure-dependent ultra-sensitive non-enzymatic glucose biosensors with a wide linear range, which could be ascribed solely to the non-symmetrical structural morphology. This novel study may perhaps open an innovative way to promote non-enzymatic glucose sensing properties.
研究领域:
材料科学
·
生物传感技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）