Nano Research
·
2020
·Vol. 13
·期 11
·2933-2938
·
IF 8.183
Gao Xiang,Xiong Liukang,Wu Jiabin,Wan Jun,Huang Liang
Two-dimensional molybdenum disulfide (2D MoS 2 ) is considered as a promising candidate for many applications due to its unique structure and properties. However, the controllable synthesis of large-scale and high-quality 2D 1T-phase MoS 2 is still a challenge. Herein, we present the scalable and controllable synthesis of 2D MoS 2 from 2H to 1T@2H phase by using K 2 SO 4 salt as a simultaneous high-temperature sulfur source and template. The as-synthesized 1T@2H-2D MoS 2 exhibits a high yield and can be easily assembled into freestanding electrode with high specific capacitance of 434 F/g at a scan rate of 1 mV/s in LiClO 4 ethylene carbonate/dimethyl carbonate (EC/DMC). Moreover, various single-crystal 2D transition metal sulfides (WS 2 , PbS, MnS and Ni 9 S 8 ) and 2D S-doped carbon can be synthesized using this method. We believe that this study may provide a new sight for scalable and controllable synthesis of other 2D materials beyond 2D MoS 2 .
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 12
·1015
·
IF 3.504
Liangfeng Zhang,Simin Liu,Yuhua Wang,Haijun Zhang,Feng Liang
A series of gold nanoparticles (AuNPs) was prepared in situ with different cucurbit[n]urils (CB[n]s) in an alkaline aqueous solution. The nanoparticle sizes can be well controlled by CB[n]s (n=5,6,7,8) with different ring sizes. The packing densities of CB[5–8] and free surface area on AuNPs were determined. A direct relationship was found between the ring size and packing density of CB[n]s with respect to the AuNP-catalyzed reduction of 4-nitrophenol in the presence of NaBH4. The larger particle size and higher surface coverage of bigger CB[n]-capped AuNPs significantly decreased the catalytic activity. Furthermore, this work could lead to new applications that utilize AuNPs under an overlayer of CB[n]s for catalysis, sensing, and drug delivery.Keywords:gold nanoparticles;cucurbit[n]urils;controllable synthesis;catalysis
研究领域:
化学
·
材料科学
·
催化
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2022
·
IF 3.407
Peng Chen,Xin Shan,Xin Lin,Heyan Yuan,Yangyang Xie,Fang Wang,Kailiang Zhang
Bi 2 O 2 Se has attracted a lot of attention in the field of photodetection due to its ultra-high mobility and tunable band gap. However, the mechanism of controllable preparation of high-quality Bi 2 O 2 Se is unclear and needs further investigation. In this paper, the concentration of reactants in the substrate region was increased by the method of space-compression, the number of nucleation was effectively controlled, and larger size Bi 2 O 2 Se was obtained. And the nucleation and selenylation mechanisms of Bi 2 O 3 were revealed based on the effect of temperatures modificatives growth of Bi 2 O 2 Se. And the controlled growth was achieved in a certain thickness range by increasing the reactant concentration in the substrate region and controlling the nucleation number. Moreover, photodetectors were constructed based on the highly crystalline Bi 2 O 2 Se. The photodetector exhibited a photoresponsivity of up to 9550 A/W under the excitation of 405 nm light and obtained highly stable and recoverable characteristics with multiple laser switches.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Daixiong Zhang,Qing Xiang
As one of most studied MOFs , extensive efforts have been devoted on the novel strategy for tailoring the size of zeolitic imidazolate framework (ZIF-8). We report here a facile and general method that enables the size-controllable engineering of zeolitic imidazolate framework (ZIF-8) by changing the addition order of Zn(NO 3 ) 2 ·6H 2 O (A) and 2-methylimidazole (B), which is very different from the all reported methods. Significant size difference for ZIF-8 s was observed between adding A-methanol solution to B-methanol solution and adding B-methanol solution to A-methanol solution under room temperature magnetic stirring. The influence of addition order on the crystal size was also applicable for preparing ZIF-8 encapsulating metal precursor (M-ZIF-8). We believe that this work not only pave a new way for efficient and general size-controllable design of ZIF-8 and M-ZIF-8, but can be also bridged with other size engineering methods (such as solvothermal method).
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 19
·11853
·
IF 6.208
Zichao Wang,Pei Liu,Ziyi Fang,He Jiang
Immobilized enzymes are a significant technological approach to retain enzyme activity and reduce enzyme catalytic cost. In this work, trypsin-incorporated Zn3(PO4)2hybrid nanoflowers were prepared via mild precipitation and coordination reactions. The controllable preparation of hybrid nanoflowers was achieved by systematically investigating the effects of the raw-material ratio, material concentration and reaction temperature on product morphology and physicochemical properties. The enzyme content of hybrid nanoflowers was about 6.5%, and the maximum specific surface area reached 68.35 m2/g. The hybrid nanoflowers exhibit excellent catalytic activity and environmental tolerance compared to free trypsin, which was attributed to the orderly accumulation of nanosheets and proper anchoring formation. Further, the enzyme activity retention rate was still higher than 80% after 12 repeated uses. Therefore, trypsin/Zn3(PO4)2hybrid nanoflowers—which combine functionalities of excellent heat resistance, storage stability and reusability—exhibit potential industrial application prospects.Keywords:hybrid materials;trypsin;nanoflowers;controlled synthesis;catalytic performance
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 3
·464
·
IF 5.3
Hanyu Jiang,Xuanjun Wang,Jin Yu,Wenjun Zhou,Shuangfei Zhao,Siyu Xu,Fengqi Zhao
The crystal structure has a great influence on mechanical sensitivity and detonation performance of energetic materials. An efficient microfluidic platform was applied for size, morphology, and crystallinity controllable preparation of ultrafine HMX. The microfluidic platform has good mixing performance, quick response, and less reagent consumption. The ultrafine γ-HMX was first prepared at room temperature by microfluidic strategy, and the crystal type can be controlled accurately by adjusting the process parameters. With the increase in flow ratio, the particle size decreases gradually, and the crystal type changed from β-HMX to γ-HMX. Thermal behavior of ultrafine HMX shows that γ→δ is easier than β→δ, and the phase stability of HMX is β > γ > δ. Furthermore, the ultrafine β-HMX has higher thermal stability and energy release efficiency than that of raw HMX. The ultrafine HMX prepared by microfluidic not only has uniform morphology and narrow particle size distribution, but also exhibits high density and low sensitivity. This study provides a safe, facile, and efficient way of controlling particle size, morphology, and crystallinity of ultrafine HMX.Keywords:energetic material;microfluidic;controllable preparation;ultrafine HMX;thermal application performance
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 17
·4325
·
IF 3.1
Jinying Zhang,Xinye Wang,Jiaxing Yang,Yexiaotong Zhang
Constructing photonic crystals with core-shell structured nanoparticles is an important means for applications such as secure communication, anti-counterfeiting marking, and structural color camouflage. Nonetheless, the precise synthesis technology for core-shell structured nanoparticles at the hundred-nanometer scale faces significant challenges. This paper proposes a controlled synthesis method for core-shell structured nanoparticles using a template method. By using 100 nm diameter silica nanospheres as templates and coating them with a ferroferric oxide shell layer, SiO2@Fe3O4core-shell structured nanoparticles with regular morphology and good uniformity can be obtained. The study experimentally investigated the effects of feed amount, modifiers, temperature, and feed order on the coating effect, systematically optimizing the preparation process. Centrifugal driving technology was used to achieve structural colors in the visible wavelength range. Additionally, the method successfully created well-defined and uniform core-shell structured nanoparticles using 200 nm diameter silica nanospheres as templates, demonstrating that this controllable synthesis method can effectively produce core-shell structured nanoparticles over a wide range of particle sizes. The template method proposed in this paper can significantly improve morphological regularity and size uniformity while effectively reducing the preparation cost of core-shell structured nanoparticles.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
Nano Select
·
2022
·Vol. 3
·期 9
·1306-1313
·
IF 0
Huangqing Ye,Guisheng Zhuang,Yingying Pan,Haibo Wang,Yanlin Li,Yishan Lin,Yu Wang,Xiping Zeng
As an organic cation, quaternary ammonium salt was introduced as a control agent to synthesize silver nanowires. The important influence of quaternary ammonium salt on the preparation of silver nanowires was seriously investigated by varying the length of carbon chain and its amount. Results showed that using quaternary ammonium salt as the control agent can successfully control the growth of silver nanowires, of which the diameters ranging from 35.06 to 46.60 nm. The diameters of the as-prepared silver nanowires tended to be smaller with a longer carbon chain. This work provides a new aspect for controllable preparation of silver nanowires. Furthermore, the as-prepared silver nanowires were used to prepare transparent electrodes. They exhibited good optical performance with 95.6% transmittance at a low sheet resistance of 18 Ω/square, demonstrating their great potential in the application for touch screens.
研究领域:
材料科学
·
纳米技术
·
电子器件
✓ 已验证
DOI
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Jing Chu,Linxuan Zhang,Quanjie Lv,Yijun Han,Kang Sun,Ke Tao
Yb-doped lead halide perovskite nanocrystals (NCs) have attracted significant attention due to their outstanding optical properties. However, scaling up the synthesis remains a practical challenge. Here, we present a scalable method for producing monodispersed Yb3+:CsPbCl3 NCs by simply heating up mixed reactants. The particle size and Yb3+ doping concentration of the produced CsPbCl3 NCs can be effectively controlled. The resulting NCs exhibit exciton and Yb3+ emissions, both can be fine-tuned by modifying the annealing temperature and duration. Unlike classical size evolution modes, we revealed that the monodispersity was attributed to a two-step nucleation and digestive ripening process. With the capability to yield over ten grams of high-quality Yb3+:CsPbCl3 NCs, our work may suggest a synthetic approach for a wide range of applications and demonstrates an alternative mechanism for forming monodispersed perovskite NCs.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Tingting Bai,Peng Lu,Zhirui Guo,Lu Xiang,Lianke Liu
Hydroquinone (HQ) can quickly reduce Au or Ag precursors only in the presence of preformed metallic seeds at room temperature without stabilizing effects and therefore is appealing for controllable synthesis of citrate-stabilized spherical Ag or Au nanoparticles (NPs). In this work, we examined the conventional room-temperature growth of citrate-stabilized Ag NPs through hydroquinone reduction in the presence of NaBH 4 -reduced Ag seeds. By control experiments and electron microscopy analysis, we reveal that this growth process is essentially under kinetic control, unlike those of Au NPs. As a result, the final Ag NPs contain a mass of kinetically favored plate-like nanostructures. Further evaluation experiments found that the selective reducibility of HQ remains at elevated temperatures. Inspired by this, we developed a thermal seeding approach for uniform citrate-stabilized Ag NPs with tunable diameters over the range 15–150 nm by simply altering the amount of Ag seeds, without previously necessary multi-cycle growth or multi-parameter adjustment.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Marine Drugs
·
2017
·Vol. 15
·期 7
·223
·
IF 3.503
Na Li,Huanhuan Wang,Xiaosai Qu,Yu Chen
ROMP is an effective method for preparing functional polymers due to its having characteristics of “living” polymerization and rapid development of catalysts. In the present work, poly(norbornene-methylamine), a mimic of chitosan, was synthesized via ROMP reaction. The amino-protected product, 5-norbornene-2-(N-methyl)-phthalimide, was prepared by a reaction of 5-norbornene-2-methylamine with phthalic anhydride, which was then subjected to the ROMP reaction in the presence of Hoveyda-Grubbs 2nd catalyst to afford poly(norbornene-(N-methyl)-phthalimide). The target product, poly(norbornene-methylamine), was obtained by deprotection reaction of poly(norbornene-(N-methyl)-phthalimide). The products in each step were characterized by FTIR and1H-NMR, and their thermal stabilities were determined by TG analysis. The effects of molar ratio between monomer ([M]/[I]) and catalyst on the average relative molecular weight (Mn¯) and molecular weight distribution of the produced polymer products were determined by gel permeation chromatography (GPC). It was found that theMn¯of poly(norbornene-(N-methyl)-phthalimide) was controllable and exhibited a narrow polydispersity index (PDI) (~1.10). The synthesis condition of 5-norbornene-2-(N-methyl)-phthalimide was optimized by determining the yields at different reaction temperatures and reaction times. The highest yield was obtained at a reaction temperature of 130 °C and a reaction time of 20 min. Our work provides a new strategy to synthesize polymers with controllable structures and free –NH2groups via ROMP.Keywords:ROMP;poly(norbornene-methylamine);controllable;living polymerization;chitosan
研究领域:
高分子化学
·
生物材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2010
·
IF 4.224
Shaochun Tang,Sascha Vongehr,Zhou Zheng,Hanjin Liu,Xiangkang Meng
We report a facile and efficient approach to prepare bimetallically doped Ag−M−carbon composites. Only if Ag nanoparticles (NPs) are embedded first into the submicrometer carbon spheres (CSs) can the second metal M (Pd, Pt, and Au) also be introduced into their interior. Especially at not too high concentrations of M-precursor ions (CM-ion), the locations and number density of the resulting NPs mirror those of the Ag NPs in/on the CSs. Therefore, the controllability of the Ag predoping allows control over the location dependent distribution of the NPs in the resulting bimetallic composites. The size and shape of the resulting NPs in the composites are largely controlled by the concentration CM-ion. The different shapes include solid core−shell and hollow NPs, as well as hedgehog-like hollow structures and dendritic aggregates. The nucleation and growth mechanisms, which differ between the different metals M, are discussed to explain the morphologies and the location dependence of the NPs in/on the CSs.
研究领域:
材料科学
·
化学工程
✓ 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）