JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Zhenbo Du,Ruoshui Li,Le Yang,Fengli Liu,Jianming Lin,Jihuai Wu,Zhang Lan
CsPbI 2 Br is a potential material for perovskite solar cells (PSCs) due to its better thermal stability and high efficiency. Centrifugal deposition for film formation greatly simplifies the steps of the conventional anti-solvent spin coating method, but there are still problems hindering progress, such as small grain size and poor photoelectric performance. In this work, NH 4 SCN was introduced as an additive during the preparation of heptylamine (C 7 H 17 N) stabilised CsPbI 2 Br nanoparticles (NCs) and the films were prepared by centrifugal deposition. The results show that the low melting temperature compounds which formed by thiourea from NH 4 SCN decomposition during annealing and unreacted PbX 2 would link the small grains together by melting and flowing; after PbX 2 precipitation and reaction with CsX, the grain size was significantly increased by about 95 % compared to that of the untreated film. Due to large grains, less defects and high crystallinity, the final power conversion efficiency and fill factor reached 12.25 % and 0.70, respectively.
研究领域:
材料科学
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太阳能
·
纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shuqin Wang,Kai Wang,Wangbei Cao,Liang Song,Shifen Li,Zihe Zhai,Liyin Shen,Yang Zhu,Wenxing Liu,Changyou Gao
The ingrowth of endogenous cells into tissue scaffolds and modulation of Treg population take a pivotal function in restoring the structure and function of heart post-acute myocardial infarction (MI). However, the traditional hydrogels are failed to achieve such functions due to their critically small mesh size and inherent bioinertness. In this study, a Treg-regulated microgel scaffold (GTK-TK-drug) was prepared by inter-microgels assembly of microgels having cyclodextrin (CD) or adamantane (Ad) with a particle size of about 220 μm. The raw materials to obtain the microgels included gelatin methacryloyl (GelMA), reactive oxygen species (ROS)-responsive crosslinking agent poly(ethylene glycol)-thioketal-poly(ethylene glycol) (PEG-TK-PEG), ROS-responsive release prodrug aminooxyacetic acid (PEG-TK-AOA), PEG-CD or PEG-Ad, and photoinitiator lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP). Quantitative real-time PCR (qPCR), cell counting kit-8, and immunofluorescence staining revealed the effectiveness of AOA for the differentiation of T cells into Treg and the ingrowth of cells in vitro and in vivo . During the short treatment of MI in vivo , the levels of plasma inflammatory factors, cardiomyocyte apoptosis and inflammatory cells were reduced significantly. In the long-term animal experiments, the recovery of cardiac function was significantly enhanced as characterized by echocardiography and the degree of myocardial fibrosis compared to the unassembled microgels control.
研究领域:
生物材料
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心脏病学
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免疫学
·
组织工程
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DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
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2025
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IF 4.4
Jinglong Li,Meiyu Zhen,Yutao Feng,Ziyi Lu,Chang Wang,Xiaoqing Xiong
Alkyl-chain anthraquinone dyes have promising performance but face application constraints due to hydrophobicity and pollution in conventional water-based dyeing. This study developed an eco-friendly synthesis and dyeing approach. Six dyes (AQ-5 to AQ-7, CAQ-5 to CAQ-7) were synthesized in supercritical carbon dioxide (scCO₂) via reactions of 1-chloroanthraquinone/1,5-dichloroanthraquinone with n -alkylamines. They showed good light absorption and thermal stability (5% weight loss at 245–298°C, suitable for scCO₂ dyeing). Meanwhile, scCO₂ dyeing regularity was revealed through the synergistic regulation of multiple parameters. Optimal scCO₂ dyeing conditions for polyester were determined: 16 MPa, 130°C, 90 min for AQ-5–AQ-7; the optimal dyeing conditions for CAQ-5–CAQ-7 were determined and these were included in the range of 120-135 °C, 16 MPa, 70-100 min. Dyed fabrics had uniform fixation with excellent washing, dry, and wet rubbing over than grade 4, and good light fastness. This work establishes a green scCO₂ system, overcoming traditional limitations, and provides a theoretical basis for eco-friendly dyes/technologies.
研究领域:
纺织化学
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绿色化学
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染料技术
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可持续材料
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化学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhen-Ya Liu,Wei Zhao,Li-Ming Chen,Fei Ding,An-An Liu,Dai-Wen Pang
Narrow bandgap silver selenide (Ag2Se) is a promising candidate for noninvasive in vivo imaging in the long-wavelength region of the second near-infrared window (NIR-IIc, 1700–2000 nm), yet precise control over its size remains challenging due to ineffective regulation of nucleation and growth, largely constrained by its extremely low solubility product. Here, we reveal a growth bottleneck in the Ag2Se quantum dots (QDs) synthesis arising from rapid monomer depletion during nucleation. The sole use of strongly binding thiol ligands further confines the system to a thermodynamically metastable size regime, hindering the continuous growth required for precise spectral tuning. By employing a dual-ligand strategy combining strongly binding thiol ligands with labile oleate ligands, we modulate monomer supersaturation and the dynamic adsorption–desorption equilibrium on the nanocrystal surface, thereby suppressing nucleation to preserve sufficient monomer for subsequent monomer diffusion-limited growth. This approach yields size-tunable Ag2Se QDs with emission peaks extending into the NIR-IIc window. Furthermore, the synergistic passivation by zinc oleate ligands significantly improves the size dispersity and colloidal stability of large-sized Ag2Se QDs. Our in-depth investigation not only addresses challenges in size control of QDs exhibiting nonclassical growth but also highlights the transformative potential of low-toxicity, NIR-IIc-emissive Ag2Se QDs for optoelectronics and noninvasive deep-tissue imaging.
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2013
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IF 3.172
Youcheng Zhao,Xinyu Song,Zhilei Yin,Qisheng Song
Controlled synthesis of CuO with various hierarchical structures consisting of self-organized nanoparticles is realized by using n-octylamine (OLA) as a structure inducing agent via a facile hydrothermal synthetic method. The growth and assemblage of CuO can be finely tuned by selecting the preparative parameters. In particular, it is found that the degree of the hierarchical organization can be modulated by simply changing the amount of the n-octylamine and CuO nanoparticles exhibit self-assembled two-dimensional (2D) sheet-like, three-dimensional (3D) disk-like and bowknot-like architectures, respectively. In the present case, OLA serves as a capping surfactant that can modulate growth of CuO nanocrystals via hydrophobic forces between the OLA molecules. CuO nanoparticles can be self-assembled into different complex architectures depending on the strength of hydrophobic forces. Hierarchical sphere-like CuO assembled from nanorods can also be easily fabricated by adjusting the starting NaOH to CuCl 2 volume ratio, in which OLA serves not only as the structure-directing agent, but also as a weak base agent to produce hydroxyl anions. The electrochemical performances of the as-synthesized different products for sensing nitrite oxidation are evaluated. The results reveal that the electrocatalytic activity is related to the secondary nanostructures. Compared to the others, the bowknot-shaped and sphere-shaped CuO products exhibit excellent electrocatalytic activity toward nitrite oxidation and fast current response in nitrite sensing because of their peculiar hierarchical structures with high BET surface areas and well-ordered pores.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Zhizhu Yue,Yonghe Yu,Tianjun Hu,Ying Wang,Lulu Cao,Yanxia Zhang,Yuhong Chang,Linjuan Pei,Jianfeng Jia
The development of economical multiphase photocatalysts is a significant challenge in achieving large-scale industrialization. Rational catalyst design can help in achieving efficient, energy-saving, and green catalytic reactions, making it more feasible to screen potential catalyst candidates. In this paper, we have successfully developed a high-efficiency photocatalyst Cu-doped Cu 2 WO 4 (OH) 2 (CWOH-y, where y represents the molar ratio of copper tungsten source), which can catalyze the aerobic coupling reaction of amines to produce corresponding imines under visible light irradiation. N-benzylidenebenzylamine is synthesized under visible light at 25 °C with an 89 % yield. Under natural light at around 35 °C (mean light intensity of 50 mW/cm 2 ), 94 % of the benzylamine is converted, and 97 % of the product is N-benzylidenebenzylamine. The catalyst exhibits high efficiency due to the synergistic effect of doped Cu, Cu 2 WO 4 (OH) 2 , and visible light. This combination generates a significant amount of superoxide free radicals and singlet oxygen when exposed to visible light. Furthermore, the catalyst demonstrates universality and stability with a wide range of amine derivatives. This study introduces a new environmentally friendly photocatalytic pathway for the synthesis of imines and emphasizes the potential applications of Cu 2 WO 4 (OH) 2 .
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高影响因子
LANGMUIR
·
2021
·
IF 3.882
Shiyu Wu,Yufu Yi,Shengliang Liao,Hongyan Si,Yuling Yang,Guorong Fan,Peng Wang
We described the comprehensive synthesis, characterization, and catalytic performance of a novel type of the ordered cubic Ia3̅d supermicroporous silicas by using tetraethyl orthosilicate as a silicon source and a hydroxyl-functionalized quaternary ammonium salt as a template under alkali conditions. The effects of various reaction conditions on the pore structure and morphology of the silica materials were thoroughly investigated. Our results showed that under a wide range of reaction conditions, supermicroporous silicas with a highly ordered cubic Ia3̅d structure can be produced with a large BET specific surface area of 1741 m2/g, high pore volume of 0.91 cm3/g, concentrated pore size at 19.1 Å, and crystalline morphology. After Al doping, the obtained aluminosilicates preserved a highly ordered cubic supermicroporous structure. By using the H-form aluminosilicates as catalysts, we selectively dimerized β-pinene. The catalysts exhibited an excellent catalytic activity for β-pinene dimerization with a conversion yield up to 100%. Compared with conventional mesoporous H-form Al-MCM-48 catalysts, the prepared supermicroporous catalysts exhibited superior catalytic performance due to their excellent shape-selective properties, producing the β-pinene dimer in a yield up to 72.4% with dimer/oligomer ratios in the range of 7.5–10.1. This study featured a detailed preparation and characterization of supermicroporous silica with novel microstructures and showed its utility in catalytic dimerization.
研究领域:
材料科学
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催化化学
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Qingyu Wang,Chen Wang,Shang Ma,Ping Lu,Jian Dong
Kinetic hydrate inhibitors (KHIs) are polymers that play a vital role in gas energy production, transport, and storage. A series of polyaspartamides based on l-aspartic acid were designed to serve as potential KHIs. Tuning the fine structures of the polyaspartamides can inhibit the tetrahydrofuran hydrate formation more effectively than classical KHIs, i.e., poly(N-vinylcaprolactam) (PVCap) and poly(N-vinylpyrrolidone) (PVP). When the hydrophobic side chain is longer, the polyaspartamide is more effective. For elucidation of the polymer structure–property relationships in the inhibition of the clathrate hydrate, the molecular-level interactions between the polyaspartamides and tetrahydrofuran hydrate were studied. Dynamics of water surrounding the polymers probed by NMR relaxometry demonstrate that the polyaspartamides can bind tightly with water molecules in the hydrate, resulting in faster transverse relaxation times of the nonfreezable water. This phenomenon can be interpreted by quantum chemical simulations and nonfreezable bound water analysis by calorimetry. The simulations show that the interaction between the polyaspartamides and the clathrate hydrate is featured by the formation of strong hydrogen-bonding, rendering severe distortion and destruction of the clathrate cages. High levels of nonfreezable bound water per polymer repeat unit were found in the amphiphilic polymers. Polyaspartamide could be used as a green resource for prevention of gas hydrate formation in energy production.
研究领域:
材料科学
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化学工程
·
能源技术
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DOI
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 26
·3188-3196
·
IF 2.073
Li-Jun Xia,Xiao-Feng Guo,Yan Ji,Liu Chen,Hong Wang
Herein, a highly reactive long-wavelength fluorescent labeling reagent, 1,7-dimethyl-3,5-distyryl-8-phenyl-(4-oxy-acetic acid N-hydroxysuccinimidyl ester) difluoroboradiaza-s-indacene (DMDSPAB-OSu), was designed and synthesized for amino compounds. Using DMDSPAB-OSu as a pre-column derivatization reagent, an HPLC-fluorescence detection method was developed for the determination of trace amounts of aliphatic amines in samples. Prior to analysis, amines were derivatized with DMDSPAB-OSu at room temperature in 0.2 mol L−1 pH 8.8 borate buffer for only 5 min, and the baseline separation of 11 aliphatic amines was achieved within 25 min. Limits of detection between 0.8 to 1.2 nM were obtained at 630 nm with an excitation wavelength of 610 nm. Furthermore, the proposed DMDSPAB-OSu-based HPLC method was applied to the analysis of lake water and human urine with satisfying recoveries ranging from 93.0–109.7%.
研究领域:
分析化学
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生物化学
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DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 19
·6450
·
IF 3.4
Di Le,Jie Pan,Haixia Xing
To chemically functionalize the Ti6Al4V alloy surface, a custom-made low-temperature atmospheric pressure plasma reactor device was used to polymerize heptylamine on it. The effect of different deposition times, an important process parameter, was also investigated. For each deposition time group, the surface morphology was observed via scanning electron microscopy (SEM). The surface chemical content was analyzed via X-ray photoelectron spectroscopy, and surface hydrophilicity was measured via water contact angle. The adhesion of bone marrow stromal cells (BMSCs) on the modified Ti6Al4V alloy surfaces was also observed via SEM. A quantitative evaluation of cell proliferation was performed via the Cell Counting Kit-8 assay. The results revealed that amino groups were introduced on the Ti6Al4V alloy surface via plasma-polymerized heptylamine (PPHA). The percentages of NH2/C for various deposition times (0 s, 30 s, 45 s, 60 s, 90 s, and 120 s) were 3.39%, 5.14%, 6.71%, 6.72%, 7.31%, and 7.65%. A 30 s, 45 s, and 60 s deposition time could significantly increase surface hydrophilicity with a mean water contact angle of 62.1 ± 1.6°, 65.7 ± 1.1°, and 88.2 ± 1.4°, respectively. Meanwhile, a 60 s, 90 s, and 120 s deposition time promoted BMSCs cell adhesion and proliferation. However, this promotion effect differed non-significantly among the three groups. In conclusion, the introduction of amino groups on the Ti6Al4V alloy surface exhibited surface modification and enhancement of cell adhesion and proliferation, which was partially associated with deposition time.Keywords:surface modification;heptylamine;plasma polymers;polymerization;titanium alloy;Ti6Al4V
研究领域:
生物材料学
·
细胞生物学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）