SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
·
IF 3.232
Jun-Dan An,Tian-Tian Wang,Yang-Fan Shi,Jian-Zhong Huo,Xiang-Xia Wu,Yuan-Yuan Liu,Bin Ding
In recent years, a new type of micro-porous material, namely metal organic framework material, has received more and more attention from many basic and industrial fields because these materials possess unique advantages. In this work, through the powerful sonochemical preparation method, a three-dimensional cluster-based Cd II -MOFs, {[Cd(abtz) 2 (H 2 O) 2 ]·(ClO 4 ) 2 ·H 2 O} n ( 1 , abtz = 1-(4-aminobenzyl)-1H-1,2,4-triazole) can be quickly synthesized in the facile ultrasonic method. Powder X-ray diffraction (PXRD) measurement confirms that these bulky samples 1 (synthesized on different ultrasonic powers and ultrasonic time conditions) were pure . In addition, ultrasonic chemical time and irradiation power did not change the structure of composites materials 1 . SEM and morphological changes of 1 in the ultrasonic synthesis are also determined. Moreover, 1 exhibits good stability, the structure of 1 can be maintained not just in various solvents, and in aqueous environments with pH values from 2 to 12. Photo-luminescent experiment also reveals that complex 1 has the excellent application prospect as highly sensitive sensing material for the biomarker DPA (2,6-pyridine dicarboxylic acid) and 5-HT (5-hydroxytryptamine) through the photo-luminescence “turn-on” and “turn-off” effect, respectively. Further photo-luminescent measurements also show that different ultrasonic powers and ultrasonic time can effectively induce fluorescent sensing enhancement for biomarkers DPA and 5-HT based on the water stable clustered-based cadmium(II) coordination framework.
研究领域:
材料科学
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生物学
·
化学
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产品关联
DOI
PubMed
高影响因子
Catalysts
·
2017
·Vol. 7
·期 1
·18
·
IF 3.082
Liyan Zhou,Shancheng Yan,Han Wu,Haizeng Song,Yi Shi
Two-dimensional transition metal dichalcogenides, such as tungsten disulfide (WS2), have been actively studied as suitable candidates for photocatalysts due to their unique structural and electronic properties. The presence of active sites at the edges and the higher specific surface area of these materials are crucial to the photocatalytic activity of the hydrogen evolution reaction. Here, WS2quantum dots (QDs) have been successfully synthesized by using a combination of grinding and sonication techniques. The morphology of the QDs was observed, using transmission electron microscopy and an atomic force microscope, to have uniform sizes of less than 5 nm. Photoelectrochemical (PEC) measurements show that the current density of WS2QDs under illumination is almost two times higher than that of pristine WS2. Furthermore, these high-quality WS2QDs may have various applications in optoelectronics, solar cells, and biomedicine.Keywords:tungsten disulfide;quantum dots;sonication;photocatalysis
研究领域:
材料科学
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能源科学
·
光电化学
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产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·
IF 2.9
Zhiqun Xu,Dengfeng Luo,Pei Wu,Bo Hou,Zhihao Zhang,Shuqiang Wang,Teng Gao,Guobin Huang,Lan Fang
The commercial applications of lead halide perovskites are hindered by their negative environmental impact and inherent instability. Consequently, developing environmentally friendly copper-based perovskite materials is crucial for future solid-state lighting and display applications. In this study, an ultrafast high-power ultrasonic synthesis strategy was utilized to achieve uniform nucleation and growth of Cs3Cu2X5 (X = Cl, Br, I) nanocrystals (NCs) that possess remarkable luminescence properties, hydroxyl protection, and ligand-free characteristics. These Cs3Cu2X5 NCs exhibited a tunable spectral range spanning from 446 to 525 nm, accompanied by photoluminescence quantum yields (PLQYs) varying from 0.2% to 79.2%. The spectral attributes of the NCs were effectively controlled by modulating the halide type and composition. It is worth noting that density functional theory (DFT) calculations offer valuable insights into the synthesis of NCs and the selection of suitable alcohol solvents. Moreover, we successfully fabricated an efficient and stable white light-emitting diode (WLED) with a high luminous efficiency of 23 lm W−1 and CIE color coordinates of (0.3266, 0.3487). Our work provides a new strategy to synthesize Cs3Cu2X5 NCs and holds promise for their potential application in display and lighting devices.
研究领域:
材料科学
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光学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
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2019
·
IF 2.687
Changhong Li,Ye Li,Tianliang Zhou,Rong-Jun Xie
Mn-doped CsPbCl 3 (CsPbCl 3 :Mn) perovskite colloidal quantum dots (QDs) attract a great deal of interests, and have great potentials for various optoelectronics applications due to their outstanding optical and electrical properties. However, practical applications of CsPbCl 3 :Mn QDs are severely limited by the cumbersome preparation methods and low photoluminescence quantum efficiency (PLQY). Herein, we propose a single-step ultrasonic synthesis method to successfully synthesize CsPbCl 3 :Mn QDs with controlled size and morphology by changing the Mn:Pb ratio. Simultaneously, we introduce triethylamine (TETN) to passivate the surface of CsPbCl 3 :Mn QDs. The phase purity, microstructure, chemical composition and photoluminescence properties of the samples were investigated by means of various analytic techniques. The synthesized QDs exhibit dual emissions of 411 and 601 nm, ascribing to the excitonic emission of QDs and the characteristic Mn 2+ emission, respectively. The quantum yield of the CsPbCl 3 :Mn QDs could therefore be significantly improved from 17.49 to 41.15%. We believe that the facial synthesis method and the surface passivation of TETN can also be applied to other transition metal or lanthanide ions doped lead halide perovskite QDs.
研究领域:
材料科学
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光学工程
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化学工程
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产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 4
·045310
·
IF 1.449
Jianping Li,Huiming Guo,Anqi Wei,Jingzhe Jiang,Yue Ji,Huijun Qiang,Yan Jiang,Hongwen Zhang,Hongbo Liu
In this study, blue-emitting carbon quantum dots (CQDs) have been directly synthesized via an ultrasonic method using starch soluble as the carbon source. The CQDs were modified by using γ-methacryloxy propyl trimethoxyl silane (KH570). The modified CQDs were then combined with silicone rubber (SR) through a hydrosilylation reaction to fabricate CQDs/SR composites. The results indicated that the average size of the as-prepared CQDs was approximately 2.6 nm, with a distribution between 1.0 and 4.0 nm. The CQDs modified by KH570 were well dispersed in the SR, which can effectively prevent the fluorescence quenching of the CQDs due to agglomeration. Remarkably, the as-prepared CQDs/SR composites emitting bright blue fluorescence have high transparency, great mechanical properties and good thermal stability, thereby facilitating enormous potential applications in a wide variety of fields such as optoelectronic devices and LEDs.
研究领域:
材料科学
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光学
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高分子化学
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产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Na Geng,Fei Wang,Di He,Fang Wang,Futing Xia,Jiayu Feng,Lijuan Jia,Lidong Wang,Ping Ning
In the wet magnesia desulfurization process, magnesium sulfite oxidation is essential to reclaim and resource utilization the byproducts. Therefore, it is of great significance to create reliable and effective catalysts. In this study, a novel and efficient catalyst, Co-MOF (BTC), was synthesized by an ultrasound assisted one-pot method. The oxidation rate of MgSO 3 by Co-MOF (BTC) was 0.112 mmol·L −1 ·s −1 , 13–14 times higher than under non-catalytic conditions, with an apparent activation energy of 26.82 kJ·moL −1 . The catalytic efficiency is 4–5 times higher than previously reported Co-SBA-15 catalysts with the same loading. The characterization results of XRD, TEM and XPS confirm that the active component cobalt has a high dispersion on TMLA, and Co (II) plays an important role in improving the oxidation performance of catalysts. The results reveal that the rich hydroxyl group on surface of TMLA is conducive to the dispersion of Co for full contact with the reactants, and the Co (II) of Co-MOF (BTC) is favorable to the formation of Co-O bond, and then promotes its oxidative activity. The kinetics of the MgSO 3 oxidation catalyzed by the prepared Co-MOF (BTC) was investigated in a bubble oxidation apparatus, indicating that the oxidation rate was dependent on the reaction temperature, pH value, oxygen partial pressure and air velocity.
研究领域:
环境科学
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材料科学
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Mian Wei,Xin Zhou,Chang Cheng,Jianjun Zhang,Chuanjia Jiang,Bei Cheng
Graphitic carbon nitride is flourishing in photocatalytic hydrogen production. However, the performance of traditional carbon nitride materials is limited by their scarcity of surface reactive sites and fast recombination of photogenerated electron-hole pairs. Herein, we introduce a simple ultrasonic synthesis method that exfoliates bulk carbon nitride into nanosheets while simultaneously forming S-scheme heterojunctions with in-situ grown thiophene-based polymer through π–π interactions. The obtained carbon nitride nanosheet/polymer S-scheme heterojunction possesses abundant surface active sites and exhibits suppressed recombination of photogenerated electron-hole pairs, resulting in a hydrogen production rate approximately double that of bulk carbon nitride and a superior apparent quantum yield of 5.00%. The S-scheme charge transfer mechanism was proven by in-situ irradiated X-ray photoelectron spectroscopy, and time-resolved femtosecond-transient absorption analysis clarified the charge separation and transfer dynamics. This study demonstrates that combining organic semiconductors and hypercrosslinked polymers is a promising strategy for designing highly efficient S-scheme heterojunction photocatalysts.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
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2019
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IF 7.279
F. Chen,C. Dong,C. Chen,W.D. Yin,W. Zhai,X.Y. Ma,B. Wei
Ultrasonic synthesis has shown great potential applications in preparing varieties of nanostructured materials. However, fabrication of nanomaterials with tunable structures and desirable properties is still challenging because of the instability and nonuniform distribution of cavitation effect in liquid phase. In this study, a novel aeration tuned ultrasonic synthesis approach is proposed for optimizing the cavitation effect in both time and space scales and fabricating SiO 2 @PNIPAm NPs. By alternation of ultrasonication and N 2 aeration, more and more gas bubbles are formed in the reaction liquid, and the collapse of those bubbles is further enhanced by the reactants of solid SiO 2 and intermediate functionalized SiO 2 NPs. As a result, SiO 2 @PNIPAm NPs with various grafting ratios are successfully synthesized simply by changing the number of ultrasonic synthesis cycle. The SiO 2 @PNIPAm NPs are subsequently used as stabilizer to form Pickering emulsions with different temperature response. This work provides a potential facile sonochemical synthesis method with high efficiency in obtaining inorganic/organic NPs of well determined structures.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2016
·
IF 2.478
Xiao-Dong Qiao,Yi Li,Yi-Yi Liu,Guo-Lei Huang,Bing-Xin Lei,Wei Sun,Zhen-Fan Sun
Three-dimensional and thermally stable mesoporous TiO 2 submicrospheres are synthesized without the use of any surfactants via treatment with high intensity ultrasound irradiation for a short period of time. Techniques of X-ray diffraction, field emission scanning electron microscopy , nitrogen adsorption-desorption, and UV–vis spectrum are used to characterize the structure and morphology of the product. The specific surface area of the mesoporous TiO 2 submicrospheres is calculated to be 53 cm 2 g −1 . The UV–Vis spectrum shows that the mesoporous TiO 2 submicrospheres have high light-scattering ability and light absorption by dye. In addition, when applied as the light-scattering layer in dye-sensitized solar cell, an overall photovoltaic conversion efficiency of 7.92% has been achieved, significantly higher than that derived from P25 electrode (6.32%).
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Nano Research
·
2019
·Vol. 13
·期 1
·79-85
·
IF 8.515
Wang Tian-Jiao,Liu Xiaoyang,Li Ying,Li Fumin,Deng Ziwei,Chen Yu
Electrochemical water splitting (EWS) is a highly clean and efficient method for high-purity hydrogen production. Unfortunately, EWS suffers from the sluggish and complex oxygen evolution reaction (OER) kinetics at anode. At present, the efficient, stable, and low-cost non-precious metal based OER electrocatalyst is still a great and long-term challenge for the future industrial application of EWS technology. Herein, we develop a simple and fast approach for gram-scale synthesis of flower-like cobalt-based layered double hydroxides nanosheet aggregates by ultrasonic synthesis, which show outstanding electrocatalytic performance for the oxygen evolution reaction in alkaline media, such as preeminent stability, small overpotential of 300 mV at 10 mA·cm −2 and small Tafel slope of 110 mV·dec −1 .
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Haijuan Jiang,Shaoxiang Yang,Hongjian Miao,Hongyu Tian,Baoguo Sun
A simple ultrasonic synthesis strategy was developed for a novel magnetic covalent organic framework. Firstly, the Fe 3 O 4 nanoparticles were encapsulated by imine-type COF, which generated by the Schiff reaction of 4,4′,4′'-(1,3,5-Triazine-2,4,6-triyl)-trianiline (TAPT) and tris(4-formylphenyl)-amine (TFPA) using ultrasonic synthesis method within 2 h. The synthesised nanocomposites showed a sizeable specific surface area, and high adsorption capacity. A fast, sensitive MSPE method with Fe 3 O 4 @TAPT-TFPA-COF as adsorbent for analysing bisphenol compounds was developed. This method's advantages were simple operation, short extraction time, and avoidance of the use of centrifugal equipment. The method validation indicate that this method exhibited superior linearity, and detection limits range between 0.33 and 0.60 μg L –1 . The recoveries of BPs ranged from 74.7 % to 107.0 %, with relative standard deviations of less than 3.8 % in water, milk, vinegar, and soy sauce samples. The proposed method was successfully applied for extracting BPs in food samples.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 6
·2671-2681
·
IF 9.6
Ren Zhuang-He,Zhang Xin,Zhang Wen-Xuan,Huang Zhen-Guo,Yang Li-Mei,Yang Ya-Xiong,Li Zheng-Long,Li Juan,Sun Wen-Ping,Gao Ming-Xia,Pan Hong-Ge,Liu Yong-Feng
Ti-based catalysts are known to improve the hydrogen storage performance of NaAlH 4 by facilitating the dissociation/recombination of H–H and Al–H bonds. The catalytic activity of metallic Ti species strongly depends on its particle size and dispersity. Ti clusters and even single atoms are therefore highly desirable, but their controllable fabrication has been highly challenging. Herein, we demonstrate a novel facile sonochemical synthesis of a Ti–O clusters featuring single Ti atom catalyst at room temperature. Through reducing TiCl 4 by MgBu 2 with ultrasound instead of heating as driving force, numerous single Ti atoms coupled with Ti–O clusters with Ti loading on graphene (Ti 1 /Ti–O@G) up to 22.6 wt% have been successfully obtained. The prepared Ti 1 /Ti–O@G contributes high reactivity and superior catalytic activity, therefore enabling full dehydrogenation of NaAlH 4 at 80 °C in thermogravimetric mode and re-hydrogenation at 30 °C and 10 MPa with 4.9 wt% H 2 . This fact indicates for the first time that single Ti atom catalyst with high loading is highly effective in catalyzing hydrogen cycling of NaAlH 4 at remarkably reduced temperatures. Graphical abstract
研究领域:
材料化学
·
能源化学
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纳米催化
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储氢材料
·
无机合成
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）