ACS Applied Materials & Interfaces
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2022
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IF 10.383
Zhi Jiang,Hezhuang Liu,Jihua Zou,Yixuan Huang,Zhaoquan Xu,Caihong Li,Desheng Liu
With the rapid advances in metal halide perovskite optoelectronics, eliminating toxic lead from perovskites has been an urgent demand. However, state-of-the-art lead-free perovskite photodetectors are still challenged with issues of low photoresponse, poor stability, etc. Here, all-inorganic lead-free perovskite (Cs3Cu2I5) single crystals that possess good stability under air exposure are synthesized via a facile solid reaction method. Meanwhile, a higher photoluminescence quantum yield of 95.2% and a prolonged carrier lifetime of 1.127 μs are obtained by further optimizing the synthesis. Benefiting from the polyporous surface and hollow structure of Cu-7,7,8,8-tetracyanoquinodimethane (CuTCNQ) microtubes, more Cs3Cu2I5 nanocrystals can adhere on the innershell and outershell of CuTCNQ-15 microtubes. This unique structure contributes to the improved efficiency of utilizing incident light and promotes charge carrier generation and transportation. As a result, the hierarchical CuTCNQ/Cs3Cu2I5 (hollow microtube/nanocrystal) heterostructure phototransistor exhibits a high responsivity of 88.36 A W–1 and a large detectivity of 1.66 × 1012Jones. The proposed lead-free perovskites and mixed-dimensional heterojunctions are promising for sensitive light detection.
研究领域:
材料科学
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光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2019
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IF 2.752
Hongfang Jiu,Na Ren,Lixin Zhang,Qing Zhang,Yuying Gao,Yajuan Meng
The flower-like ZnMn 2 O 4 hollow microtubules were synthesized by a hydrothermal method and calcination method. The composition and morphology were characterized. The results showed that flower-like hollow microtubules were obtained through calcination treatment. The as-prepared ZnMn 2 O 4 electrochemical properties of flower-like hollow microtubules anode material for lithium-ion batteries were investigated. The first charge and discharge capacity was measured at 2152/1263 mA h g −1 when the current density at 400 mA g −1 . After 300 cycles, the capacity kept 515 mA h g −1 corresponding to the coulombic efficiency of 99%, which exhibited preferable cycling performance. The stability of the structure has been shown by rate performance, which had been tested under different current density. The results suggest a promising application of the ZnMn 2 O 4 as anode material for lithium-ion batteries.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
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IF 3.9
Xiao-Yu Ye,Yu-Ling Qi,Ying Cheng,Qiang Wang,Guo-Zhi Han
Morphology regulation and element doping are effective means to improving the photocatalytic performance of graphite-phase carbon nitride (g-C3N4). In this article, using melamine and zinc chloride as raw materials, a novel kind of Zn/Cl-doped hollow microtubular g-C3N4 (Zn-HT-CN) by a hydrothermal method was developed. The structure and morphology of Zn-HT-CN and reference samples were characterized by X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), etc. The doping of Zn/Cl narrowed the bandgap width of the hollow microtubular g-C3N4, as well as the inhibiting recombination of photogenerated electron and holes. Compared with the pure g-C3N4 microtube, Zn-HT-CN showed excellent catalytic performance for the photodegradation of tetracycline hydrochloride (TCH) under irradiation of visible light. The photodegradation rate of TCH reached 94.41% in 40 min, which was about two times as high as that catalyzed by the pure g-C3N4 microtube. Moreover, it was also superior to the g-C3N4 microtube doped with other typical metal elements. In addition, Zn-HT-CN showed good tolerance to environmental pH, and the catalytic efficiency of the material remained at 78.78% after five cycles.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2020
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IF 3.306
Jianxiong Xu,Guo Du,Chao Tong,Showen Xie,Haihu Tan,Lijian Xu,Na Li
Lanthanide-ion doped β -NaYF 4 crystals with bright and tunable upconversion luminescence are urgently demanded in anti-counterfeiting printing. Herein, novel highly luminescent hexagonal NaYF 4 :Ln 3+ upconversion hollow microtubes (UCHMs) were controlled synthesized by a one-pot hydrothermal method employing poly(ethylene imine) (PEI) as ligand. The surface of the synthesized UCHMs was decorated by water-soluble polymer of PEI , rendering the hydrophilic nature of UCHMs. Besides, the synthesized UCHMs exhibited bright upconversion luminescence under the irradiation of a 980 nm laser due to the unique structure and morphology. Time-dependent morphology evolution showed that the formation of UCHMs experience a morphology change from nanoparticles to hexahedron to microprisms, and ultimately to microtubes via a dissolution-reconstruction formation mechanism. Furthermore, the resulting UCHMs were used as pigments for preparation of luminescent inks and their application in anti-counterfeiting printing was explored. To realize panchromatic printing, we prepared three-primary-color (RGB) UCHMs by rational tailoring the doping pairs and molar ratio of the lanthanide ions in UCHMs. Based on the superposition principle of the red-green-blue as three primary colors, a wide array of luminescent inks with panchromatic luminescent colors were prepared. The successful creation of securely light-responsive smart encryption patterns on various packaging substrates such as art paper, aluminum sheet, polyethylene terephthalate (PET) film and cardboard by screen printing was demonstrated. Our strategy provides a new route for controlled synthesis of hydrophilic UCHMs and the as-prepared UCHMs have great potential in application of packaging anti-counterfeiting.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Peng Huang,Nan Li,Liang Zeng,Yujie Zhu
The long-term goal of electrochemical ammonia (NH3) synthesis under ambient conditions is to replace the Haber–Bosch process. One of the biggest challenges in this field is that the N≡N triple bond is too stable to be activated. Therefore, most research is mainly focused on the development of advanced electrocatalysts to address this challenge. However, the extremely low solubility and slow diffusion of N2 molecules in aqueous electrolytes are usually overlooked. Here, the Bi-loaded Cu hollow microtube with a porous structure is reported as the gas diffusion electrode for N2 electroreduction. Compared with the conventional planar electrode configurations, the hollow gas diffusion electrode (HGDE) possesses unique advantages in breaking through the mass transfer limit of low-solubility gases. It can also provide abundant electrochemically active sites due to its porous structure, forming a gas–liquid–solid three-phase interface that is conducive to electrocatalytic reactions. Besides, the adjustable N2/H3O+ at the three-phase interface can further help enhance the reaction activity and selectivity. As a result, the Bi-loaded Cu HGDE exhibits an NH3 yield of 4.6 μg h–1 cm–2 and a Faradaic efficiency of 5.8% at −0.4 V (vs RHE, reversible hydrogen electrode). This study may stimulate interest in optimizing the electrode structure and developing types of electrodes for efficient electrochemical ammonia synthesis.
研究领域:
材料科学
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电化学
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2024
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IF 8.2
Ying Li,Xiangyang Wei,Qingyuan Liu,Diming Zang,Rui You
The persistent challenge of poor recovery characteristics of NO2 sensors operated at room temperature remains significant. However, the development of In2O3-based gas sensing materials provides a promising approach to accelerate response and recovery for sub-ppm of NO2 detection at room temperature. Herein, we propose a simple two-step method to synthesize a one-dimensional (1D) In2O3@ZnO heterostructure material with hollow microtubes, by coupling metal–organic frameworks (MOFs) (MIL-68 (In)) and zinc ions. Meanwhile, the In2O3@ZnO composite-based gas sensor exhibits superior sensitivity performance to NO2 under visible light activation. The response value to 5 ppm of NO2 at room temperature is as high as 1800, which is 35 times higher than that of the pure In2O3-based sensor. Additionally, the gas sensor based on the In2O3@ZnO heterostructure demonstrates a significantly reduced response/recovery time of 30 s/67 s compared to the sensor based on pure In2O3 (74 s/235 s). The outstanding gas sensing properties of the In2O3@ZnO heterostructure-based sensors can be attributed to the enhanced photogenerated charge separation efficiency resulting from the heterostructure effect, and the improved receptor function toward NO2, which can increase the reactive sites and gas adsorption capacity. In summary, this work proposes a low-cost and efficient method to synthesize a 1D heterostructure material with microtube structures, which can serve as a fundamental technique for developing high-performance room-temperature gas sensors.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Panjie Li,Yong Yang,Zihuan Ling,Zhao Fang,Qinghua Deng,Baojing Zhou,Qin Zhong,Jinyou Shen
The design of high-performance organic photocatalysts with special morphologies via subtle engineering at the atomic level is difficult. In this study, a sequence of hollow microtubular chalcogen (O, S, Se, and Te) conjugated organic polymers (COPs) for CO 2 photoreduction was successfully synthesized for the first time. The introduction of chalcogen atoms into molecular skeletons can regulate the flexibility of the building blocks, drive the polymerization of materials to evolve into a hollow tube morphology and significantly modify the energy band. The Se and Te atoms as semimetal elements, introduced in the organic molecules, distinctly boost the delocalization degree of excited electrons and accelerate the charge separation. The Se, Te-COPs show high photocatalytic CO 2 -to-CO conversion activity, namely 233.4, 347.3 μmol·g −1 in 6 h and 0.42 %, 0.67 % apparent quantum yield at 365 nm, respectively. This study presents the possibility of exploiting high-activity organic photocatalysts with special morphologies via a atom substitution strategy.
研究领域:
材料化学
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光催化
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环境科学
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能源化学
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高分子化学
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纳米材料
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半导体物理
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Yuchun Ji,Zhengde Li,Laiping Zhang,Jilin Wang,Wenbiao Li,Wenzhuo Chen,Guoyuan Zheng,Fei Long,Zhengguang Zou
In this paper, a novel boron nitride hollow microtube (BNHM) structure by annealing assisted high-pressure etching method. The products were characterized by XRD , FTIR, Raman, XPS , SEM, TEM, TGA , BET, UV–vis, and PL. The result shows that the sample displayed a one-dimensional hollow tube structure directionally covered with nanosheets . The average inner diameter of the hollow tube is 1 µm with a length of 2–4.5 µm. And the wall thickness of the hollow tube structure is about 100 nm. In addition, the band gap value of the sample is 5.51 eV presenting the strongest absorption peak at 225 nm. The specific surface area of the sample is 272.6 m 2 ·g −1 , showing good adsorption efficiency on Congo red (absorbed 75% in 5 min). Meanwhile, the possible growth mechanism of BNHM is also discussed.
研究领域:
材料科学
·
纳米技术
·
化学
·
表面科学
✓ 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）