NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 34
·16273-16279
·
IF 3.925
Haiming Cheng,Chi Cao,Ying Zhang,Dayang Wang,Wensheng Yang,Renguo Xie
Low-dimensional organic–inorganic metal halides have shown great application potential and new opportunities for use in solid-state lighting due to their excellent optical and electronic properties. However, the most studied hybrid compounds contain lead, which limits their application environments. The preparation of organic–inorganic metal halides with high luminous efficiency, long-term stability, and a lead-free composition for environmental protection has become an important goal for the design of materials. Here, novel Sb3+-doped indium-based metal halides, (CH3NH3)4InCl6·Cl, have been designed and synthesized via a simple mechanical ball milling method; in the lead-free zero-dimensional (0D) halide (CH3NH3)4InCl6·Cl, isolated [InCl6]3− octahedra are separated by methylamine cations. Under UV excitation, the bulk-phase powder exhibits broadband orange-yellow emission peaking at 607 nm with a full width at half-maximum of ∼160 nm upon incorporating Sb3+ into the (CH3NH3)4InCl6·Cl matrix. The photoluminescence quantum yield (PLQY) of Sb3+-doped (CH3NH3)4InCl6·Cl is as high as 67.72%. The effects of the Sb3+-doping concentration on the crystal structure and optical characteristic have been investigated. The indirect band gap characteristics of (CH3NH3)4InCl6·Cl were demonstrated via density functional theory (DFT) calculations, and the relatively wide band gaps of 3.83 eV and 2.99 eV of (CH3NH3)4InCl6·Cl and (CH3NH3)4ClInCl6:Sb3+ were experimentally determined. These experimental results suggest that the as-prepared Sb3+-doped (CH3NH3)4InCl6·Cl has potential applications in solid-state lighting devices.
研究领域:
材料科学
·
无机化学
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光电子学
·
固体照明
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半导体材料
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Bingkai Gao,Lei Zhang,Runqiu Peng,Panlai Li,Qian Wu,Zhijun Wang
The exploration of performance luminescence near-infrared (NIR) material is crucial for rapidly developing NIR spectroscopic techniques. Herein, the NIR LaMg 0.5 Sn 0.5 O 3 :Cr 3+ phosphor was synthesized by a high temperature solid-state method. And its luminescence performance were improved by [In 3+ -Sc 3+ ] substituting for [Mg 2+ -Sn 4+ ]. The half-peak width can be expanded to 211 nm, the emission intensity can reach the seven times of that un-substitution, and the emission intensity at 423 K was maintained at 60 % of that at room temperature , moreover, the internal quantum efficiency can reach 54.2 %. On this basis, the phosphor converted light emitting diodes ( pc -LEDs) were achieved by combining La(Mg 1-x Sn 1-x In x Sc x ) 0.5 O 3 :Cr 3+ with blue LED, importantly, it can be applied to the biodetection and night vision lighting, which indicate its application value.
研究领域:
材料科学
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生物医学工程
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光学材料
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分子影像
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转化医学
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光电子学
✓ 已验证
DOI
高影响因子
Chem Catalysis
·
2023
·
IF 9.4
Bin Sun,Xiaoli Wang,Zaiqi Li,Hongli Liu,Weiyi Jiang,Kepeng Song,Zeyan Wang,Peng Wang,Yuanyuan Liu,Zhaoke Zheng,Ying Dai,Baibiao Huang,Hefeng Cheng
Synthesis of high-loading single-atom catalysts (SACs) with unique coordination structures, especially those p -block main group metals (e.g., In, Sn), to realize electrocatalytic CO 2 reduction reaction (CO 2 RR) with high performance remains a challenge. Here, we report a complex-confinement strategy to prepare In–O 2 N 2 and In–O 4 SACs on hollow mesoporous nitrogen-doped carbon, with a loading amount as high as 13.02 wt% and 9.89 wt%, respectively. In–O 2 N 2 SACs outperform In–O 4 SACs in CO 2 RR toward formate production, reaching a high selectivity (95.5%) and partial current density of formate (−58.2 mA cm −2 ). In situ Raman spectroscopy shows that In–O 2 N 2 SACs have a sole ∗OCHO intermediate for formate product, whereas both ∗OCHO and ∗COOH intermediates are observed in In–O 4 SACs. Computational calculations elucidate that coordination environment matters greatly in the electronic structure manipulation of In SACs, where a closer position of p -band center to the Fermi level enables In–O 2 N 2 SACs to bind and activate CO 2 molecules more favorably.
研究领域:
催化化学
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材料科学
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电化学
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环境科学
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能源化学
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纳米材料
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理论计算化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xiaoxue Li,Keyu Xie,Long Song,Mengjia Zhao,Zhipan Zhang
The effective separation of photogenerated electrons and holes in photocatalysts is a prerequisite for efficient photocatalytic water splitting. CuInS2 (CIS) is a widely used light absorber that works properly in photovoltaics but only shows limited performance in solar-driven hydrogen evolution due to its intrinsically severe charge recombination. Here, we prepare hierarchical graphitic C3N4-supported CuInS2 (denoted as GsC) by an in situ growth of CIS directly on exfoliated thin graphitic C3N4 nanosheets (g-C3N4 NS) and demonstrate efficient separation of photoinduced charge carriers in the GsC by forming the Z-scheme system for the first time in CIS-catalyzed water splitting. Under visible light illumination, the GsC features an enhanced hydrogen evolution rate up to 1290 μmol g–1 h–1, which is 3.3 and 6.1 times higher than that of g-C3N4 NS and bare-CIS, respectively, thus setting a new performance benchmark for CIS-based water-splitting photocatalysts.
研究领域:
材料化学
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光催化
·
能源化学
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纳米材料
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可持续能源
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半导体物理
·
表面科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Ke Pei
Ferroelectric organic field-effect transistor (Fe-OFET) memory devices exhibit low power consumption, low cost and good flexibility, which are indispensable to next generation flexible and wearable memory devices. However, up until the present, the ferroelectric materials used in Fe-OFETs have been limited to ferroelectric polymers, i.e. poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)], and suffer from large surface roughness and high-risk of depolarization. This work integrates a new two-dimensional CuInP 2 S 6 crystal into Fe-OFET, which can introduce excellent ferroelectric property due to its single crystalline smoothness and noncentrosymmetric crystal structure. Meanwhile, the high-mobility rubrene crystal is selected as the channel material to construct rubrene/CuInP 2 S 6 organic/inorganic van der Waals heterojunctions . Associated with synergetic effect of single-crystalline nature of the heterojunction and atomically flat/defect-free interface, the memory devices possess a high programming speed of 0.5 s and long retention time of 10 4 s with a current ratio larger than 10 3 . Furthermore, the performance of flexible devices is also demonstrated, including a programming/erase cycle of 1000 with a current on/off ratio approaching 10 3 , data retention time of 10 4 s with a current on/off ratio of 10 3 and a current on/off ratio maintained at 10 2 even after 100 bending cycles under a bending radius of 25 mm, which are qualified for memory buffer usage or short-term data storage especially when they are integrated with other flexible electronics. The proposed configuration of memory transistors using organic/inorganic heterojunctions provides a rational design of device structure toward flexible Fe-OFET non-volatile memory applications.
研究领域:
材料科学
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凝聚态物理
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微电子学
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纳米科技
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柔性电子学
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半导体器件
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功能材料
✓ 已验证
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 19
·3986
·
IF 5
Sheng Huang,Shasha Gao,Hui Zhang,Ce Bian,Yulong Zhao,Xiuquan Gu,Wenjie Xu
In recent years, all-inorganic cesium lead halide perovskite quantum dots have emerged as promising candidates for various optoelectronic applications, including sensors, light-emitting diodes, and solar cells, owing to their exceptional photoelectric properties. However, their commercial utilization has been limited by stability issues. In this study, we addressed this challenge by passivating the surface defects of CsPbBr3quantum dots using indium acetate, a metal–organic compound. The resulting CsPbBr3quantum dots exhibited not only high photoluminescence intensity, but also a remarkably narrow half-peak width of 19 nm. Furthermore, by embedding the CsPbBr3quantum dots in ethylene-vinyl acetate, we achieved stretchability and significantly enhanced stability while preserving the original luminous intensity. The resulting composite film demonstrated the potential to improve the power conversion efficiency of crystalline silicon solar cells and enabled the creation of excellent white light-emitting diodes with coordinates of (0.33, 0.31). This co-passivation strategy, involving surface passivation and polymer packaging, provides a new idea for the practical application of CsPbBr3quantum dots.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
光伏技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Mingyi Yu,Jianbo Wang,Guojun Li,Shule Zhang,Qin Zhong
Indium vanadate (InVO 4 ) possesses excellent potential in photocatalytic carbon dioxide (CO 2 ) reduction, but further modifications of reducing charge recombination and increasing active sites are still needed. Herein, InVO 4 /g-C 3 N 4 (InVO-CN) heterojunction composite photocatalysts were prepared via in situ formation of InVO 4 nanoparticles on the lamellar structure of graphite carbon nitride (g-C 3 N 4 ) containing nitrogen (N) defects. Among these composites, 30% InVO-CN showed the best photoreduction performance for CO 2 at normal temperature and pressure without sacrificial agent (carbon monoxide, CO: 20.14 μmol g –1 h –1 ; methane, CH 4 : 3.46 μmol g –1 h –1 ), which were 1.8 and 2.8 times higher than these of pure g-C 3 N 4 and InVO 4 . The excellent performance could be attributed to the enhancement of CO 2 adsorption, and most importantly, the enhanced charge carrier separation and reduction capacity induced by the formation of Z-scheme heterojunction between InVO 4 and g-C 3 N 4 . In this work, intimate heterojunction interfaces between materials were formed by introducing g-C 3 N 4 with defects in InVO 4 , which provides a promising modification scheme.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Meng-Ting Xu,Yu Zhu,Chang Wei,Lei Liu,Zicai Zhu,Zhen-Hua Tang,Yuan-Qing Li,Shao-Yun Fu
Electrodes with high electrical conductivity, yet good flexibility and mechanical compliance, are critical for electroactive artificial muscles. Herein, a promising liquid metal (LM) electrode is proposed by transforming eutectic gallium–indium (EGaIn) LM with high surface tension into paste-like LM with solid Ga2O3 shells. The developed compliant LM electrode not only shows high conductivity and negligible additional stiffness but also displays excellent electrical stability during cyclic actuation. Based on the LM electrode, the poly(vinyl chloride) gel (PVCG) artificial muscle developed exhibits the maximum actuation strain of 18.7% at a low electric field strength of 9 V μm–1 and maintains excellent durability without obvious performance attenuation after 10,000 s. A comparison shows that the as-developed PVCG artificial muscle is superior over that based on widely used carbon electrodes. Moreover, an artificial upper limb and crawling worm were manufactured to explore the great potential of PVCG artificial muscle in the robotic field. In addition, the practical application demonstration of the PVCG artificial muscle in the biomimetics field is also successfully fulfilled through the design of reasonable structures. Due to its easy fabrication, excellent electrical conductivity, and high mechanical compliance, the newly developed LM electrode is promising for high-performance PVCG artificial muscles in bionic robots.
研究领域:
材料科学
·
机器人学
·
电活性聚合物
·
生物机电一体化
✓ 已验证
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 22
·5960-5968
·
IF 7.779
Qiqiong Ren,Jian Zhang,Maxim S. Molokeev,Guojun Zhou,Xian-Ming Zhang
Low-dimensional metal halides have emerged as promising platforms for the development of new-generation phosphor-converted light emitting diodes (pc-LEDs), in which zero-dimensional (0D) hybrids with lone-pair ns2 states, in particular, show unprecedented competitiveness owing to their fascinating photoluminescence (PL) properties. Herein, we designed a novel 0D indium hybrid, (C20H20P)2InCl5, and proposed a co-doping strategy to incorporate Bi3+ (6s2) and Sb3+ (5s2) ions into this indium hybrid. Widely tunable emissions from blue to red are achieved, which are assigned to the triplet self-trapped excitons (STEs) (3P1 → 1S0) of Bi3+ (476 nm) and Sb3+ (658 nm), respectively. Importantly, an uncommon triplet–triplet energy transfer from Bi3+ to Sb3+ contributes to tunable dual emissions, and enables a single-phase cool white-light emission under ultraviolet (UV) excitation. Moreover, the energy transfer mechanism is discussed clearly by fluorescence photon dynamic analysis and DFT calculations. This work provides a deeper insight into triplet–triplet energy transfer, as well as presents a new model system for tuning the PL behaviours of ns2 configuration dopants.
研究领域:
材料科学
·
光电技术
·
光子学
✓ 已验证
DOI
高影响因子
International Journal of Nanomedicine
·
2022
·
IF 7.033
Yi Guan,Nan Liu,Yan Yu,Qiang Zhou,Meiyu Chang,Yongheng Wang,Sanqiao Yao
Purpose The objective of this study was to evaluate and compare the histopathological implications of silica nanoparticles (Nano-SiO 2 ) and indium-tin oxide nanoparticles (Nano-ITO), in vivo. Methods Male Sprague-Dawley rats were exposed to Nano-SiO 2 (50 mg/kg) and Nano-ITO (6 mg/kg) by a single intratracheal instillation, respectively. Broncho-alveolar lavage fluid (BALF) and lung tissue were obtained at 7, 14, 28, and 56 days post exposure for analysis of BALF inflammatory factors, total protein, and for lung tissue pathology. Histopathological and ultrastructural change in lungs were investigated by hematoxylin and eosin, Masson’s trichrome, sirius red staining, periodic acid Schiff stain, and transmission electron microscopy. The expression of SP-A, collagen type I and III in lung tissue was determined by immunohistochemistry and ELISA. Results The rats in both models exhibited obvious collagen fibrosis and the severity of the lung injury increased with time after exposure to respective dosage increased. Several parameters of pulmonary inflammation and fibrosis significantly increased in both groups, which was reflected by increased LDH activity, total proteins, TNF-α, and IL-6 levels in BALF, and confirmed by histopathological examination. The results also showed that the two models exhibited different features. Exposure to Nano-ITO caused persistent chronic lung inflammation, illustrated by the infiltration of a large amount of enlarged and foamy macrophages and neutrophils into the lung parenchyma. In Nano-SiO 2 exposed rat lung tissue, granulomatous inflammation was most prominent followed by progressive and massive fibrotic nodules. Compared with the Nano-SiO 2 rats, Nano-ITO exposed rats exhibited significantly severe pulmonary alveolar proteinosis (PAP) pathological changes, lower fibrosis, and higher levels of inflammatory biomarkers. However, Nano-SiO 2 exposed rats had greater fibrosis pathological changes and more severe granulomas than Nano-ITO exposed rats. Conclusion This study suggests that the Nano-SiO 2 -induced model has greater value in research into granulomas and fibrosis, while the Nano-ITO-induced model has greater repeatability in area of PAP.
研究领域:
毒理学
·
病理学
·
纳米技术
·
呼吸医学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2016
·Vol. 26
·期 40
·7224-7233
·
IF 11.382
Sheng Cao,Jinju Zheng,Jialong Zhao,Zuobao Yang,Minghui Shang,Chengming Li,Weiyou Yang,Xiaosheng Fang
Dual emission quantum dots (QDs) have attracted considerable interest as a novel phosphor for constructing ratiometric optical thermometry because of its self-referencing capability. In this work, the exploration of codoped Zn–In–S QDs with dual emissions at ≈512 and ≈612 nm from intrinsic Cu and Mn dopants for ratiometric temperature sensing is reported. It is found that the dopant emissions can be tailored by adjusting the Mn-to-Cu concentration ratios, enabling the dual emissions in a tunable manner. The energy difference between the conduction band of the host and Cu dopant states is considered as the key for the occurrence of Mn ion emission. The as-constructed QD ratiometric temperature sensor exhibits a totally robust stability with a fluctuation of ≈ I Cu / I tot versus times lower than 1% and almost no hysteresis in cycles over a broad window of 100–320 K. This discovery represents that the present cadmium-free, intrinsic dual-emitting codoped QDs can open a new door for the synthesis of novel QDs with stable dual emissions, which poise them well for challenging applications in optical nanothermometry.
研究领域:
材料科学
·
纳米技术
·
光学传感
·
半导体量子点
·
温度测量
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yang Mi,Anqiang Jiang,Lei Kong,Jun Wang,Heng Guo,Sheng-Nian Luo
I–III–VI ternary quantum dots (QDs) have emerged as favorable alternatives to the toxic II–VI QDs for optoelectronic and biological applications. However, their use as optical gain media for microlasers is still limited by a low fluorescence efficiency. Here, we demonstrate amplified spontaneous emission (ASE) and lasing from colloidal QDs of Zn-processed AgIn5S8 (AIS) for the first time. The passivation treatment on the AIS QDs yields a 3.4-fold enhancement of fluorescence quantum efficiency and a 30% increase in the two-photon absorption cross section. ASE is achieved from the AIS/ZnS core/shell QD films under both one- and two-photon pumping with a threshold fluence of ∼84.5 μJ/cm2 and 3.1 mJ/cm2, respectively. These thresholds are comparable to the best optical gain performance of Cd based-QDs reported in the literature. Moreover, we demonstrate a facile whispering-gallery-mode microlaser of the core/shell QDs with a lasing threshold of ∼233 μJ/cm2. The passivated AIS QDs can be promising optical gain media for photonic applications.
研究领域:
量子点
·
光电子学
·
光子学
·
材料科学
·
纳米技术
·
激光物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）