BULLETIN OF MATERIALS SCIENCE
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2020
·Vol. 43
·期 1
·1-6
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IF 1.392
Li Lili,Yang Lin,Fu Bowen,Li Zhiqiang
Herein, we demonstrate a hot-injection method towards the fabrication of \(\hbox {Sb}_{2}\hbox {S}_{3}\) . The evolution from amorphous \(\hbox {Sb}_{2}\hbox {S}_{3}\) nanoparticles to a sheaf of \(\hbox {Sb}_{2}\hbox {S}_{3}\) nanorods cross-linked together occurring with the increase of reaction temperature and time is studied. The structural, compositional and morphological features of \(\hbox {Sb}_{2}\hbox {S}_{3}\) products indicate the formation of crystalline \(\hbox {Sb}_{2}\hbox {S}_{3}\) with orthorhombic phase and high purity. As the reaction proceeds, it can be observed that the individual nanorod grows along the elongated direction ( c -axis), and it is noteworthy that its round cross-section could develop into the rectangular cross-section subsequently. In this study we also propose a possible formation mechanism for the growth process of \(\hbox {Sb}_{2}\hbox {S}_{3}\) , and it reveals that the present hot-injection could provide an ideal growth environment for synthesizing the nanostructured materials by optimizing the experimental parameters.
研究领域:
材料科学
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纳米技术
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高影响因子
Chemistry-An Asian Journal
·
2014
·Vol. 9
·期 8
·2309-2316
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IF 3.935
Qun Luo,Yongquan Zeng,Liwei Chen,Changqi Ma
Graphical How does your wurtzite-CZTS grow? The crystal growth mechanism of wurtzite Cu 2 ZnSnS 4 (WZ-CZTS) has been investigated by using time-dependent XRD patterns, TEM images, and absorption spectra analysis. The formation process of WZ-CZTS nanocrystals involves four steps: reduction of Cu 2+ to element Cu, nucleation of Cu 7 S 4 , nucleation and growth of WZ-CZTS on the basal planes of Cu 7 S 4 , and phase transformation from Cu 7 S 4 to WZ-CZTS over about 5 min. en This link goes to a English section zh This link goes to a English section Wurtzite Cu 2 ZnSnS 4 (WZ-CZTS) has been controllably synthesized through a hot-injection route. The crystal-growth mechanism of WZ-CZTS has been investigated by using time-dependent XRD patterns, TEM images, and absorption spectra analysis, and revealed that WZ-CZTS nucleated and grew from monoclinic Cu 7 S 4 nanocrystals through phase transformation of Cu 7 S 4 to WZ-CZTS within 5 min. The synthesis processes are dependent on precursor concentration, reaction temperature, reaction time, organic ligand, and sulfur source and have been studied in detail. It was revealed that the width of the WZ-CZTS nanocrystals was mainly controlled by the precursor concentration, which determines the diameter of Cu 7 S 4 . The length could be regulated by the ratio of dodecanethiol (DDT) to oleylamine (OLA) and reaction time. en This link goes to a English section zh This link goes to a English section 1
研究领域:
材料科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 18
·13633-13637
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IF 2.019
Liu Yueli,Zhong Qiaohui,Chen Keqiang,Zhou Jing,Yang Xue,Chen Wen
Layered MoS 2 , which is treated as an alternative candidate of graphene, has attracted great attention due to its large intrinsic band gap and relatively high carrier mobility. It is relatively convenient and inexpensive to prepare MoS 2 through chemical synthesis route. Herein, a novel solution-based hot-injection method is used to prepare MoS 2 . Controlling the reaction time leads to the variation of MoS 2 morphologies, which present as quantum dots and nanosheets. Detail studies are carried out to investigate the formation mechanism of MoS 2 . The results indicate that the formation of layered MoS 2 nanosheets follows a bottom-up process, which includes three steps in the order of quantum dots, small pieces and large area nanosheets.
研究领域:
材料科学
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化学合成
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DOI
高影响因子
MATERIALS LETTERS
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2017
·
IF 2.572
Manjing Wang,Wen Wu,Xuerong Zheng,Xu Hou,Caichi Liu,Qiuyan Hao,Hui Liu
A facile, environment-friendly, low-cost and time-saving hot-injection process using triethylene glycol as solvent was developed to synthesize uniform and pure-phase Sb 2 Se 3 nanorods with single crystalline structure. The crystal structure, morphology and chemical composition of the synthesized Sb 2 Se 3 nanorods were characterized. The synthesized Sb 2 Se 3 nanorods were used to prepare a photodetector and obtain excellent photoresponsive properties with a switching “on/off” ratio of 70 under 658 nm irradiation (15.8 mW/cm 2 ) at a voltage of 3 V. Moreover, the Sb 2 Se 3 -based photodetector displayed a good durability and fast photoresponsive property with response time of 64 ms and decay time of 68 ms. To our best knowledge, the photoresponsive time of the synthesized Sb 2 Se 3 -based photodetector is faster than that of previous reported Sb 2 Se 3 -based photodetector.
研究领域:
材料科学
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纳米技术
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光电材料
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DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-19
·
IF 14.7
Poredoš Primož,Gao Jintong,Shan He,Yu Jie,Shao Zhao,Xu Zhenyuan,Wang Ruzhu
Passive solar membrane distillation (MD) is an emerging technology to alleviate water scarcity. Recently, its performance has been enhanced by multistage design, though the gains are marginal due to constrained temperature and vapor pressure gradients across the device. This makes condenser cooling enhancement a questionable choice. We argue that condenser heating could suppress the marginal effect of multistage solar MD by unlocking the moisture transport limit in all distillation stages. Here, we propose a stage temperature boosting (STB) concept that directs low-temperature heat to the condensers in the last stages, enhancing moisture transport across all stages. Through STB in the last two stages with a heat flux of 250 W m −2 , a stage-averaged distillation flux of 1.13 L m −2 h −1 S −1 was demonstrated using an 8-stage MD device under one-sun illumination. This represents an 88% enhancement over the state-of-the-art 10-stage solar MD devices. More notably, our analysis indicates that 16-stage STB-MD devices driven by solar energy and waste heat can effectively compete with existing photovoltaic reverse osmosis (PV-RO) systems, potentially elevating freshwater production with low-temperature heat sources.
研究领域:
能源工程
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环境科学
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水资源管理
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DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 10
·2173
·
IF 3.1
Jiazhen He,Hang Li,Chengqi Liu,Xiaoqian Wang,Qi Zhang,Jinfeng Liu,Mingwei Wang,Yong Liu
Metal halide perovskite semiconductors have emerged as promising materials for various optoelectronic applications due to their unique crystal structure and outstanding properties. Among different forms, perovskite nanowires (NWs) offer distinct advantages, including a high aspect ratio, superior crystallinity, excellent light absorption, and carrier transport properties, as well as unique anisotropic luminescence properties. Understanding the formation mechanism and structure–property relationship of perovskite NWs is crucial for exploring their potential in optoelectronic devices. In this study, we successfully synthesized all-inorganic halide perovskite NWs with high aspect ratios and an orthorhombic crystal phase using the hot-injection method with controlled reaction conditions and surface ligands. These NWs exhibit excellent optical and electrical properties. Moreover, precise control over the halogen composition through a simple anion exchange process enables the tuning of the bandgap, leading to fluorescence emission, covering a wide range of colors across the visible spectrum. Consequently, these perovskite NWs hold great potential for efficient energy conversion and catalytic applications in photoelectrocatalysis.
研究领域:
材料科学
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光电子学
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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
Journal of Physical Chemistry C
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2010
·
IF 4.224
Lai-Jun Zhang,Xing-Can Shen,Hong Liang,Jia-Ting Yao
Four families of magic-sized ZnSe quantum dots (ZnSe MSQDs) with the first exciton absorption peaks at 280 nm (F280), 291 nm (F291), about 319 nm (F319), and 347 nm (F347) were synthesized using fatty amine−H2Se complex as selenium precursor via noninjection one-pot or hot-injection approaches. The formation, growth, and transformation of these families of ZnSe MSQDs were monitored mainly by ultraviolet−visible absorption spectroscopy. Relatively pure F291 and F347 were obtained via the combination of hot-injection technology with purification treatment and were further characterized using mass spectroscopy, infrared spectroscopy, fluorescence spectroscopy, transmission electron microscopy, and X-ray powder diffraction. F291 and F347 are speculated to be [(Zn7Se7)(OLA)2(OA)] (OLA = oleylamine, OA = octylamine) and [(Zn16Se15)(OLA)7], respectively, by analyzing the corresponding mass and the infrared and absorption spectra; both emit narrow exciton fluorescence with relatively small stokes shift of 9 and 2 nm, respectively. Ultrafine ZnSe nanorods with a diameter of about 1.7 nm formed via oriented attachment of F347 were observed using transmission electron microscopy. Fatty amine−H2Se complex has been demonstrated to be a simple, phosphine-free, low-cost, and effective selenium precursor for the synthesis of ZnSe MSQDs or regular quantum dots (RQDs).
研究领域:
材料科学
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纳米技术
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光谱学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
·
IF 3.133
Wen Wu,Manjing Wang,Limin Liang,Yufei Yan,Xuerong Zheng,Qiuyan Hao,Hui Liu,Jun Zhang,Caichi Liu
The length effects on photoconductivity have been observed in Sb 2 Se 3 nanorods with uniform diameter grown by a hot-injection polyol process. The phase formation and morphology evolution of Sb 2 Se 3 nanorods were investigated by XRD and TEM analysis. By changing the reaction temperature from 150 °C to 250 °C, the sizes and aspect ratios of Sb 2 Se 3 nanorods can be easily controlled, with an average length ranged from 0.6 μm to 3.2 μm. The length-controlled nanorods were directly used for fabricating prototype photodetectors to explore their length-dependence performances. A significant increase of photoresponse with length elongation has been observed, in which the optimal device displays a remarkable response to simulated solar light with a high switching “on/off” ratio of 320, short response/recovery times (0.15/0.16 s) and long-term durability. This length-dependence property on photodetectors can be considered as an important step to promote the performance of 1D Sb 2 Se 3 nanomaterials .
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Tang Xiaosheng,Yang Jie,Li Shiqi,Chen Weiwei,Hu Zhiping,Qiu Jing
Novel CsPbBr3/CdS core/shell structure quantum dots (QDs) were successfully synthesized using a facile hot-injection method. The corresponding CsPbBr3/CdS QDs based light-emitting diodes (QLEDs) were further prepared, which demonstrated the maximum luminance of 354 cd/m2 and an external quantum efficiency (EQE) of 0.4% with the current efficiency (CE) of 0.3 cd/A. Moreover, the optoelectronic performance of the CsPbBr3/CdS QDs based QLEDs exhibited a comparable enhancement in contrast to the pure CsPbBr3 QDs based QLEDs. Hypothetically, the novel CsPbBr3/CdS structure QDs introduced one new route for advanced light emission applications of perovskite materials.
研究领域:
材料科学
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光电子学
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DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 6
·1-10
·
IF 2.101
Liang Qingshuang
In this work, we show that compositionally controlled Cu 2 (Sn 1–x Ge x )S 3 nanocrystals can be successfully synthesized by the hot-injection method through careful tuning the Ge/(Sn+Ge) precursor ratio. The band gaps of the resultant nanocrystals are demonstrated to be linearly tuned from 1.45 to 2.33 eV by adjusting the composition parameter x of the Ge/(Sn+Ge) ratio from 0.0 to 1.0. The crystalline structures of the resultant NCs have been studied by the X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), select area electron diffraction (SAED), and Raman spectroscopy. A ligand exchange procedure is further performed to replace the native ligands on the surface of the NCs with sulfur ions. The photoresponsive behavior indicates the potential use of as-prepared Cu 2 (Sn 1–x Ge x )S 3 nanocrystals in solar energy conversion systems. The synthesis of compositionally controlled Cu 2 (Sn 1–x Ge x )S 3 nanocrystals reported herein provides a way for probing the effect of Ge inclusion in the Cu-Sn-S system thin films.
研究领域:
材料科学
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纳米技术
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 15
·1-7
·
IF 2.8
Cui Yong,Zhang Wei,Li Bin,Li Xuetian,Shao Hongmei,Rai Ritu
CuIn 0.7 Ga 0.3 Se 2 thin-film solar cells with the over 23% power conversion efficiency are viewed as one the most promising devices in the solar energy field. A tremendous amount of efforts is spent to explore new absorbable layer material because of the rare of indium and gallium. Using abundant element to partly substitute In or Ga is considered an effective way. In this paper, colloidal oleylamine-capped Cu 3 InSnS 5 quaternary nanocrystals are synthesized by hot injection way using mixed solvent of oleylamine and octadecene. The crystal structure, morphology, optical absorption, and valence state properties of as-synthesized oleylamine-capped Cu 3 InSnS 5 nanocrystals are determined by using X-ray powder diffraction, transmission electron microscopy, UV–vis spectrometry, and XPS. The XRD analysis of Cu 3 InSnS 5 quaternary nanocrystals possesses zincblende structure. UV–vis spectrometry characterization shows that the bandgap of the zincblende Cu 3 InSnS 5 quaternary nanocrystals is 1.35 eV, which is suitable for the absorbable layer for the thin-film solar cells. The XPS illustrates valence state of four elements. The as-fabricated glass/ITO/CdS/Cu 3 InSnS 5 nanocrystals/Al thin-film structure is obtained by spin-casting as-synthesized Cu 3 InSnS 5 nanocrystals. The thin-film solar cell displays power conversion efficiency under AM1.5G illumination.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
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