Science of Advanced Materials
·
2020
·Vol. 12
·期 7
·1078-1089
·
IF 1.117
Xu Hongna,Jin Liguo,Cheng Yan
Metal organic skeleton (MOFs) is a kind of porous material composed of metal ions and organic ligands through coordination, which can be used to absorb a lot of toxic substances from waste water. In this research, UiO-66, UiO-66(Zr) and UiO-66(Zr)–2COOH were synthesized by solvent
thermal method, and physical analysis was conducted on the adsorbent properties of the materials by means of XRD, IR, Zeta potential, etc. In the adsorption test of wastewater impurities, UiO-66(Zr)–2COOH was firstly taken as the research object. With the increase of the initial concentration
of hydrochloric acid, the adsorption capacity of the organic skeleton was greatly increased. However, when the concentration increases further, the growth rate of adsorption decreases, and with the increase of temperature, the adsorption decreases further. The organic skeleton of Hg(II) adsorption
process conforms to the secondary dynamic adsorption model. At the same time, the organic skeleton materials of Hg(II) has strong ability of recognition, the recognition of Hg(II) sex is much stronger than the Ni(II) identification. Uio-66(Zr) and UiO-66(Zr)–2COOH are selected for adsorption
of As, and the adsorption process of the two kinds of materials of As is close to the Freundlich model(III). The ability of absorbing As(III) of these materials is stronger than the ability of As(V). At the same time, UiO-66(Zr)–2COOH shows higher adsorption capacity on the As(III),
and maximum adsorption capacity is 220 mg/g.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2022
·Vol. 14
·期 8
·1298-1303
·
IF 1.067
Hu MengDi,Chen TianHong,Zhu HongLiang,Liu Hao,Shi Yi,Yan ShanCheng
Indium-tin-oxide (ITO) thin film was usually produced on quarts glass in 25–150 nm thickness by various techniques. In this research, we prepared ITO thin film on substrate of silicon wafer by sol–gel method, measured by step profiler to be 20 nm. By reducing the organic
components in the samples, and through investigation of TG/DTA/DTG, it is concluded that the ITO film reached the peak of recrystallization at 533 °C. The ITO thin film had the spectral responsivity of 5.6 A/W and strongest laser absorbance both at 450 nm wavelength, which can be concluded
through photocurrent response and I–V curing.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 5
·855-860
·
IF 2.598
Yu Huijuan,Xi Chenbin,Hu Jianhua,Du Ming,Yang Dong
An amphiphilic copolymer, PEG-b-PLA-b-(PAA-co-PNIPAM), was synthesized via atom transfer radical polymerization of tert-butyl acrylate and N-isopropyl acryamide using PEG-b-PLA-Br as a macroinitiator and CuBr/Me6 TREN as a catalytic
system, followed by selectively hydrolyzing tert-butyl groups to carboxyl groups. Then, doxorubicin (DOX) was loaded to the hydrophobic core, and the PAA segments were cross-linked by cystamine to get disulfide cross-linked and DOX loaded micelles. The transmission electron microscopy
images showed that the cross-linked DOX loaded micelles were spherical nanoparticles, with a mean diameter of 100 nm. The drug release behavior of the cross-linked DOX loaded micelles was redox responsive. The cumulative release amount of DOX was 33.1% with the presence of 10 mM of glutathione
(GSH) at 37 °C, much higher than that without the presence of GSH, which was only 4.3%. Furthermore, the cumulative release amount of DOX was 50.9% at 25 °C, higher than that at 37 °C, indicating that the cross-linked DOX loaded micelles were also thermo-sensitive.
研究领域:
药剂学
·
生物材料
·
肿瘤学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2021
·Vol. 13
·期 12
·2450-2459
·
IF 1.474
Tan Xin,Zheng Zhijie,Peng Bo,Wu Xiaogang,Huang Xiangyang,Chen Xiaofei
Ti/RuO2–IrO2 electrode was used in this study as an anode, while titanium plate (Ti) was used as a cathode for electrochemical oxidation process, to explore the influences of related parameters on degradation of p-nitrophenol (PNP) and removal of Cu2+
from mixed simulated wastewater. Using a single chamber reactor, we tested the influence of various factors on the PNP degradation and Cu2+ elimination. The factors that were tested are as follow; the type of electrolyte, density of the current, various values of pH and different
concentrations of Cu2+. Furthermore, a dual-chamber diaphragm reactor compartmentalized by cationic membrane was utilized to explore the removal mechanism of PNP and Cu2+. Results showed that, treatment of PNP-Cu2+ simulated wastewater, with NaCl as electrolyte,
had a better effect compared with Na2SO4, which had characteristics such as shorter reaction time and higher degradation efficiency for PNP. Removal of Cu2+ had no obvious advantage over Na2SO4. The degradation of PNP and removal of Cu2+
were improved with increased current density when the rang was increased from 10 to 40 mA/cm2. Cu2+ concentration when increased initially promoted the degradation of PNP. At the same time, Cu2+ acted as electron acceptor at the cathode that slowed down the
consumption of H+ through reduced combination of H+ with electrons. The degradation rate of PNP decreased with increased initial pH, but the Cu2+ was opposite. In this experiment, the degradation of PNP was positively correlated with indirect oxidation of active
chlorine, and the Cu2+ was removed by cathodic electrodeposition.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 12
·1816-1824
·
IF 1.158
Qin Huihao,Zhang Wei,Luo Yi,Wei Yubo,Sun Shenglu,Chen Jingya
Polylactic acid glycolic acid (PLGA), a polymer material, is used as a shell and perfluorooctane (PFOB) as the core. Fe3O4@SiO2 nanoparticles are distributed in the shell to prepare a magnetic phase change multifunctional nano emulsion contrast agent
(Fe3O4@SiO2/PLGA/PFOB). The ultrasound, magnetic resonance imaging and CT imaging effects of the contrast agent on normal rat liver parenchyma are investigated. Methods: Single emulsification method is used to prepare Fe3O4@SiO2-loaded
polymer Fe3O4@SiO2/PLGA/PFOB nanoparticles encapsulated with PLGA. In addition, polymer Fe3O4@SiO2/PLGA nanoparticles loaded with Fe3O4@SiO2 nanoparticles, PLGA@PFOB nanoparticles coated with
PLGA and blank PLGA nanoparticles are prepared as experimental control group. Its surface morphology, internal structure, particle size, potential and other general characteristics are tested. RAW264.7 mouse mononuclear macrophages are cultured in vitro. Prussian blue staining is used
to observe macrophage phagocytosis after Fe3O4@SiO2/PLGA/PFOB contrast agent is added to incubate for 3 hours. MTT method is used to detect the effect of contrast agent on cell activity. The macrophage suspension engulfed with Fe3O4-PFOB
is examined by ultrasound, magnetic resonance and CT. The results showed that Fe3O4@SiO2/PLGA/PFOB is brown emulsion after being dissolved in double distilled water. Under the light microscope and scanning electron microscope, Fe3O4@SiO2/PLGA/PFOB
is spherical, with regular shape, uniform size, good dispersity and smooth surface. Macrophages are dependent on the phagocytosis of the contrast medium without affecting the activity of macrophages. Moreover, in vitro imaging experiments, compared with the control group, macrophages
phagocytized by Fe3O4@SiO2/PLGA/PFOB have obvious enhancement effects in ultrasound, magnetic resonance and CT imaging. In conclusion, Fe3O4@SiO2/PLGA/PFOB has good stability in vivo, can be engulfed by liver macrophages,
and can enhance ultrasound, magnetic resonance and CT imaging of liver parenchyma. It is a safe and effective multifunctional ultrasound contrast agent.
研究领域:
医学影像学
·
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2021
·Vol. 13
·期 7
·1295-1303
·
IF 1.474
Liu Guangheng,Yang Xiangfeng,Niu Qiming,Sun Wenkui
ABSTRACT
A new type of difolate targeting nano-level ultrasound contrast agent ((folate molecule, FOL)2-TUAs) was prepared, so as to investigate its targeted binding effect with human breast cancer mammary carcinoma cells (MCF-7) in vitro. L-2-aminoadipic
acid (L-2-AD) as a branch unit was inserted at the hydroxyl end of distearoyl phosphatidylethanolamine (DISP)-PEG2000-COOH to construct a tree structure. At this time, the free hydroxyl group in the distearoyl phosphatidylethanolamine (DISP)-PEG2000-COOH structure modified the FOL with the
help of N-Hydroxysuccinimide/N,N'-dicyclohexylcarbodiimide (NHS/DCC). Each 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000] (DISP-PEG2000) connected two FOLs to generate difolate targeted nanomaterials. Nano laser particle size (PS)
and Zeta potential analyzer (ZPA) were applied to analyze the physical characteristics of the material such as PS and dispersion, and the enhanced development effect in vitro was detected by the ultrasonic diagnostic instrument. Besides, the targeted binding ability of the contrast
agent based on this material to folate receptor (FR) overexpressing MCF-7 cells was analyzed by flow cytometry (FCM) and fluorescence microscope. In the experiment, hydrogen-1 nuclear magnetic resonance (1H NMR) demonstrated that (FOL)2-TUAs was successfully synthesized.
The surface of this material was round and uniformly distributed without aggregation. According to the relative number of FOL molecules, non-targeted nano-agent (U-TUA), monofolate targeted nano-agent (FOL-TUA), and difolate targeted nano-agent ((FOL)2-TUA) were obtained. The in
vitro imaging showed that different materials exhibited enhanced imaging effects in ultrasonic diagnostic equipment. FCM and fluorescence microscopy both indicated that the difolate TUA could achieve a good binding to MCF-7 cells. Most of the nano-agents were attached to the cell membrane,
surrounded by red fluorophore, namely increasing the FOL content of DISP-PEG2000 chain could enhance the targeted binding ability of tumor cells.
研究领域:
肿瘤学
·
医学影像学
·
药剂学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2018
·Vol. 10
·期 10
·1381-1388
·
IF 1.318
Yao Shujuan,Li Qiancheng,Kong Ningning,Li Chao,Wei Mingming,Song Ruru,Ren Xiaozhen,Pu Xipeng,Li Wenzhi
We presented facile synthesis of Cu3–x
Zn
x
SnS4 composites (CZTSs, 0 ≤ x ≤ 3) with variety morphologies via simple one-pot hydrothermal process without hazardous chemicals, simply by varying initial precursor Cu/(Zn +
Sn) concentration ratio. The influence of initial Cu/(Zn+Sn) concentration ratio on the microstructures and properties of composites was investigated. The morphological, structural, and optical properties of the samples were characterized by field-emission scanning and transmission electron
microscopes, X-ray diffraction, N2 adsorption–desorption, and UV-Vis diffuse reflectance. The photocatalytic activity of the samples was studied using visible light irradiation of rhodamine B. Benefiting from the initial precursor Cu/(Zn+Sn) concentration, the as-prepared
3D hierarchical carnation-flowerlike CZTSs with high initial zinc concentration exhibit superior adsorption capability and much higher photocatalytic activity than that with low initial zinc concentration. The possible degradation mechanism of RhB was proposed.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 5
·647-654
·
IF 1.158
Yin Qing,Guo Maolian,Li Wei,Ren Huizhang,Wang Jianping,Zhang Xingxiang
The polyurethane/polyurea microcapsules containing n-octadecane were prepared and modified by interfacial polymerization, where styrene maleic anhydride copolymer (SMA) was selected as emulsifier, polyurea based shell material was synthesized with isophorone diisocyanate (IPDI)
and diethylenetriamine (DETA). Besides, polyethylene glycol 400 (PEG-400) was also added to form polyurethane shell and modify the microcapsules morphology. SEM images proved that with the modification of polyethylene glycol 400, the microcapsules morphology improved significantly. The microstructure
of microcapsules under varying factors such as emulsification rates, DETA dropping rates and core/shell ratios were analyzed systematically. In particular, the equipments such as field emission scanning electron microscope (FE-SEM), different scanning calorimetry (DSC) and thermogravimetric
(TG) were used to investigate the morphology, phase change properties and thermal stability of microcapsules. The DSC results verified the phase transition behavior of octadecane microcapsules, and microcapsules also displayed pretty thermal stability.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2021
·Vol. 13
·期 4
·550-555
·
IF 1.474
Dou Mingyu,Zhao Wenli,Lin Jie,Huang Xianqiang,Li Dacheng
In this work, a novel 4-aminophenylarsonic acid functionalized polyoxovanadates (POVs) hybrid material, namely, (Me2NH2)4 ·[(L)8(H12V16O32)] (H2L = 4-NH2C6H4AsO3H2)
POVs 1 was solvothermally synthesized and fully characterized. The results revealed POVs 1 consists of four similar tetranuclear vanadium clusters bridged by eight organic 4-aminophenylarsonic acid ligands. Remarkably, functionalized hybrid POVs 1 was further investigated as a heterogeneous
stable catalyst in oxidation of sulfide derivatives, and exhibited high catalytic activities (yields up to 96.7%). Additionally, the functionalized hybrid polyoxovanadates catalyst can be reused without losing activities after three runs cycle.
研究领域:
材料科学
·
催化
·
无机化学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 7
·1319-1325
·
IF 2.598
Xiang Di,Lin Huiming,Ma Jie,Chen Xiang,Jiang Jingjie,Qu Fengyu
In order to enrich the variety of zinc oxide (ZnO), well-defined porous ZnO hollow microspheres (PZHM) by a mass of nanoparticles were successfully synthesized through a simple solvothermal method. Zinc acetate and 1,2-propylene glycol was used as zinc source and solvent respectively
to fabricate PZHM without the assistance of any surfactant. Upon changing the amount of zinc acetate and 1,2-propylene glycol, the morphology of the samples could be adjusted. PZHM, with 1–2 μm in diameter and 200–300 nm in wall thickness, were found to be composed of
nanoparticles that assembles to form the large surface area and highly porous samples. Gas sensing performances of the ZnO hollow spheres have been investigated, showing high sensitivity (S = 180 at 1000 ppm), low detection limit (1 ppm), fast response/recovery (8/9 s), and very good
selectivity.
研究领域:
材料科学
·
纳米技术
·
化学传感器
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2022
·Vol. 14
·期 8
·1410-1418
·
IF 1.067
Xin Jia-Ying,Li Yue,Liu Feng-Yuan,Sun Li-Rui,Wang Yan,Xia Chun-Gu
Cu(II) adulteration in preserved vegetables by unreliable producers to increase their visual appeal or compensate for natural colour changes is most common. Methanobactin (Mb) is a Cu(II)-coordinated peptide, which plays crucial role in Cu(II) capture and absorption and the catalysis
of Cu(II)-containing methane monooxygenase in methanotrophs. In this study, Mb-functionalized gold nanoparticles (Mb-AuNPs) was applied to develop a dual readout colorimetric detection for Cu(II) adulteration in preserved vegetables. In the presence of Cu(II), Mb-AuNPs was assembled into nanocluster
driven by Cu(II)/Mb coordination, and the assembly process was monitored by the visible spectrum on the variation of surface plasmon resonance peak. The results showed that, Mb-AuNPs possessed excellent peroxidase-like activity after Cu(II) coordination. In the presence of Mb-AuNPs, the amount
of Cu(II) obviously affected the rate of hydroquinone oxidation by H2O2 and the change of A246. The visible and ultraviolet dual-readout detection system containing Mb-AuNPs, hydroquinone and H2O2 exhibited high sensitivity and selectivity
for Cu(II). The linear range of visible and UV detection towards Cu(II) was 0.05–0.4 μmol/L, the limit of detection were 37.50 nmol/L and 4.48 nmol/L, respectively. In conclusion, the Cu(II) coordination driven Mb-AuNPs assembly makes it able to detect Cu(II) adulteration in
preserved vegetables by dual channel methods to eliminate the occurrence of false positives and improve the accuracy of measurement results. Such non-spatially separated Mb-AuNPs assembly and it catalyzed hydroquinone oxidation dual channel readout was simple, fast, reliable and significantly
facilitated the detection efficiency of Cu(II).
研究领域:
分析化学
·
纳米技术
·
食品安全
·
环境科学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2017
·
IF 1.671
Zhou Zhiping,Yu Yingsen,Sun Quanmin,Liu Xiaotang,Lei Bingfu,Yan Yun
In this work, up-conversion phosphor CaF2:Yb3
+, Er3+ was synthesized by the co-precipitation method. X-ray Diffraction (XRD) and Photoluminescence Spectra (PL) were used to characterize the samples. The effects of annealing temperature and
Yb3+ and Er3+ concentrations on the luminescence properties were discussed. Strong green and red light were obtained under 980 nm laser excitation, the optimal annealing temperature was 600 °C, while the optimal doping concentration was 8 mol% Yb3+ and
0.6 mol% Er3+. The green (540 nm and 552 nm) and red (652 nm and 669 nm) up-conversion luminescence peaks can be ascribed to the transitions of 4S3/2-4I15/2 and 4F9/2-4I15/2, respectively. The
up-conversion luminescence intensities of the green and red emitting peaks can be changed by adjusting the concentration ratio of Yb3+ and Er3+. Hence, it can potentially be used as the red light conversion agent. The dependence of up-conversion intensities (CaF2:Yb3+,
Er3+) on excitation power indicated that two-photon absorption processes were responsible for green and red luminescence.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）