JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2019
·
IF 5.04
Jin Li,Qin Wang,Lei Zheng,Hongbo Liu
A novel graphene aerogel has been synthesized from cellulose by an easy way through sol-gel reaction and carbonization . In this route, it can be found the products have a high yield about 48 % and form a specific porous networks assembled by graphene flake. The product sample like CGA-2, characteristic of a specific area about 1426.11 m 2 /g and total pore volume about 1.02 cm 3 /g, exhibits a remarkable performance for removing cationic dye like methylene blue (MB) in water. Of which the maximal MB adsorption capacity can be found about 610.85 mg/g in a neutral solution and 1.2 g/g in a basic solution. Under the condition of initial MB concentration of 100 mg/L and pH of 7.0, the adsorption equilibrium can be achieved on CGA-2 in 10 min, with MB removal ratio about 99 %. In the MB adsorption on CGA-2, the isotherm fits Langmuir model with correlation coefficient of 0.9905, and the kinetics follows pseudo-second-order model with correlation coefficient of 0.9999.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
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2021
·Vol. 36
·期 4
·045025
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IF 2.352
Xiang Yu Liu,Jin Li
Solar-driven nano-semiconductor catalysts have shown great potential in solving environmental pollution and energy issues. They convert solar energy into chemical energy, release strong oxidizing hydroxyl radicals (OH·), and thoroughly degrade organic pollutants. However, these photocatalysts in turn may also damage some organic carriers. Therefore, we have used graphite phase carbon nitride (g-C3N4) as the isolation layer to prevent the carrier polyester fiber (PET) from being oxidized by zinc oxide (ZnO). ZnO-g-C3N4@PET composite has been prepared by hydrothermal method, photoluminescence results indicated that ZnO-g-C3N4@PET has a low photo-generated charge recombination rate, while g-C3N4 improves the visible light response of the composite and exhibits an obvious photocatalytic enhancement effect. In the experiment of degrading methylene blue (MB), the degradation efficiency of ZnO-g-C3N4@PET composite has been significantly improved compared with ZnO@PET and g-C3N4@PET alone. In addition, the prepared photocatalyst also has good reusability and still maintains a high degradation rate after five cycles of tests. In the end, a possible mechanism and a pathway of photocatalytic degradation of MB were proposed. All in all, this is a feasible way to build a highly efficient, environmentally friendly and sustainable supported photocatalyst.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
Journal of Analysis and Testing
·
2018
·Vol. 2
·期 1
·69-76
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IF 0
Zhen Wen-Yao,Bai Jing,Jia Xiao-Dan,Wu Lie,Jiang Xiu-E
The local tumor hypoxia has become one of the main obstacles for photodynamic therapy (PDT).To break through this barrier, the fabrication of O 2 -evolving nanoplatform has been more significant. Herein, the uniform methylene blue (MB)–bovine serum albumin (BSA)–Fe(III) nanoparticles (MB–BSA–Fe(III) NPs) were successfully synthesized by biomineralization approach. MB–BSA–Fe(III) NPs show high loading capacity of MB, and Fe(ΙΙΙ) has excellent catalytic performance towards abundant H 2 O 2 in cancer cells to generate O 2 , overcoming tumor hypoxia. All these combination effects remarkably increase the therapeutic efficiency of PDT, resulting in almost complete destruction of cancer cells. Most importantly, MB–BSA–Fe(III) NPs exhibit T 2- magnetic resonance imaging, which have the potential for precise visualization of the tumor location. Our results demonstrate that MB–BSA–Fe(III) is a novel H 2 O 2 -responsive and O 2 -evolving nanoplatform and it has great potential for clinical applications such as cancer diagnosis, treatment or drug delivery.
研究领域:
纳米医学
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肿瘤学
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生物材料科学
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产品关联
DOI
Catalysis Science & Technology
·
2021
·Vol. 11
·期 23
·7727-7739
·
IF 6.119
Biao Zhu,Qianxin Xu,Xiaoyan Bao,Dawei Lu,Hao Yin,Yumei Qin,Xing-Can Shen
The development of efficient and stable photocatalysts to solve environmental issues is essential and remains a big challenge. In this work, flower-like CoNiFe-LDH is deposited in situ on g-C3N4 nanosheets, successfully constructing a Z-scheme heterojunction CoNiFe-LDH/g-C3N4 photocatalyst for the photoreduction of CO2 and photodegradation of MB dye. The synthesized nanohybrid shows superior photocatalytic CO2 performance (42.04 μmol g−1 h−1) and fast photodegradation MB performance (0.1057 min−1). The improved photocatalytic performance was attributed to the formation of the Z-scheme heterojunction with matched energy bands, and the intimate heterojunction contact interface, which significantly enhanced the interfacial charge transfer rate and improved the separation efficiency of electron–hole pairs. Moreover, the photocatalytic mechanism was proposed based on PL, photocurrent responses, EIS, and EPR experiments. This work can shed light on further application for environmental problems of Z-scheme heterojunction photocatalysts.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
Applied Nanoscience
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2022
·Vol. 12
·期 12
·3995-4004
·
IF 3.869
Bao Li-hong,Wen Yu-xin,Ling Jia-wen,Guan Fang-lan,Nie Jin-mei,Zhang Mei
In this study, titanium dioxide (TiO 2 ) and graphene oxide (GO) were used to make a titanium dioxide/reduced graphene oxide (TG) composite under hydrothermal condition, and the TG composite was subsequently dye-sensitization (DTG). TEM, XRD, Raman, XPS, and UV–vis DRS spectroscopy were used to examine the structure and morphology of DTG, and the results revealed that the grafting rate of dye molecules on TG was approximately 20.4% and the band-gap value for TiO 2 , TG and DTG were 3.21, 3.03, 2.57 eV, respectively. The photocatalytic performances of DTG, TG, and TiO 2 were investigated under the illumination of a xenon lamp, and it was discovered that the final removal rates of MB by TiO 2 and TG were only 21.53% and 50.37%, but DTG can remove 97.67% of MB, the COD value of the effluent decreased by 88.24%. Furthermore, the elimination rate of MB maintained over 90% after 5 cycles of photocatalytic tests, indicating that DTG had good endurance.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Natural Product Communications
·
2022
·
IF 1.496
Ruolan Yang,Jingjing Ma,Hui Guo,Qinghua Meng,Yuwei Wang,Hao Yan,Ruyi Jin,Zhi Li,Lingjie Meng
MS, and IR, 1H NMR and 13C NMR spectroscopy were employed to elucidate 4 novel evodiamine (EVO) derivatives with nitro, amino, and methoxy groups, namely 2-NO2-EVO (7a), 10-OCH3-2-NO2-EVO (7b), 2-NH2-EVO (8a), and 10-OCH3-2-NH2-EVO (8b). The amino compounds (8a, 8b) were obtained by the reduction of nitro derivatives (7a, 7b) with SnCl2/HCl. The antiproliferative activities of these compounds were tested by Cell Counting Kit-8 assay for 48 h against the MDA-MB-231 and sw620 cancer cell lines, as well as the normal LO2 cells. The in vitro experiment showed that 8a possesses the most potent inhibitory activities against MDA-MB-231 and SW620 cells, with IC50 values of 0.79 and 1.28 μM, respectively. The cytotoxicity of 8a against the 2 cancer cell lines was higher than that of EVO.
研究领域:
药物化学
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肿瘤学
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有机合成
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Xi Wu,Chenggang Geng,Weiwei Cheng,Zhenjiong Wang,Yan Zhang,Di Wu,Xiaozhi Tang
In this reasearch, a homogeneous electrochemical sensor based on PCN-224@MB@Apt was fabricated for the ultrasensitive determination of ochratoxin A (OTA). Firstly, nanoscale PCN-224 were synthesized as the nanocarrier to embed the signal probe of methylene blue (MB). Then, the OTA aptamer (Apt) was added and connected to PCN-224@MB via the Zr– O –P bond between Zr metal sites of PCN-224 and phosphate group of Apt as the biogate. When OTA exists, the Apt would preferentially bind with OTA and fall off from PCN-224@MB, leading to the release of MB and generation of differential pulse voltammetry (DPV) response. The DPV response of MB was linearly correlated with the amount of OTA. The optimized PCN-224@MB@Apt sensor showed outstanding detection performance towards OTA with a low detection limit of 2.6 × 10 −5 ng/mL (S/N = 3) and wide linear range (10 −4 -10 ng/mL). Meanwhile, the fabricated homogeneous electrochemical sensor exhibited splendid stability, reproducibility, and specificity. To assess the practical applicability, the PCN-224@MB@Apt sensor was applied to detect OTA in real corn samples and desirable recovery rates varying from 83.2 % to 109.6 % were obtained.
研究领域:
分析化学
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食品安全检测
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产品关联
DOI
PubMed
高影响因子
Catalysts
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2020
·Vol. 11
·期 1
·10
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IF 3.52
Yang Dang,Yu Cheng,Yukun Zhou,Yifei Huang,Kaige Wang
The treatment of organic dye contaminants in wastewaters has now becoming more imperative. Fenton-like degradation of methylene blue (MB) and methyl orange (MO) in aqueous solution was investigated by using a nanostructure that a layer of CuCl2nanoflake film grown on the top surface of nanoporus anodic alumina substrate (nano-PAA-CuCl2) as catalyst. The new nano-PAA-CuCl2composite was fabricated with self-assembly approach, that is, a network porous structure film composed of CuCl2nanoflake grown on the upper surface of nanoporous anodic alumina substrate, and the physical and chemical properties are characterized systematically with the X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and high-resolution transmission electron microscopy (HRTEM), Energy Dispersive Spectrometer (EDS), X-ray photoelectron spectroscopy (XPS). The experimental results showed that the nano-PAA-CuCl2catalyst presented excellent properties for the degradation of two typical organic pollutants such as MB and MO, which were almost completely degraded with 8 × 10−4mol/L nano-PAA-CuCl2catalyst after 46 min and 60 min at reaction conditions of H2O218 mM and 23 mM, respectively. The effects of different reaction parameters such as initial pH, H2O2concentration, catalyst morphology and temperature were attentively studied. And more, the stability and reusability of nano-PAA-CuCl2were examined. Finally, the mechanism of MB and MO degradation by the nano-PAA-CuCl2/H2O2system was proposed, based on the experimental data of the BCA and the temperature-programmed reduction (H2-TPR) and theoretical analysis, the reaction kinetics belonged to the pseudo-first-order equation. This new nanoporous composite material and preparation technology, as well as its application in Fenton-like reaction, provide an effective alternative method with practical application significance for wastewater treatment.Keywords:composite of nanoporous anodic alumina-CuCl2catalyst;Fenton-like reaction;advanced oxidation processes;organic pollutant;degradation mechanism
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
·
IF 3.014
Gao-yu Zhao,Lun-jiang Liu,Jun-rong Li,Qin Liu
Novel NiFe 2 O 4 /Ag 3 PO 4 composites were prepared by a simple ion-exchange deposition method. The samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and UV–visible diffuse reflectance spectroscopy (UV–vis DRS). It is worth to note that these NiFe 2 O 4 /Ag 3 PO 4 composites could act as both adsorbents and photocatalysts for the removal of methylene blue (MB). The as-prepared 5%-NiFe 2 O 4 /Ag 3 PO 4 composite exhibited much higher adsorptive and photocatalytic activity than the pure Ag 3 PO 4 . Through the combined action of adsorption and photodegradation, MB could be removed more efficiently. The photocatalytic mechanism of NiFe 2 O 4 /Ag 3 PO 4 composites is also proposed.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zewan Qin,Qing Guan,Yating Lu,Yu Tian,Xia Yang
The naphthalene tetracarboxdiimide (NDI) modified NH 2 -UiO-66(Zr) and NH 2 -MIL-101(Cr) (NDI/UZr and NDI/MCr for short) metal organic frameworks (MOFs) materials with strong covalent bond O C–N–C O were designed and prepared by solvothermal method. The comprehensive physical and chemical properties of the materials were characterized, and the adsorption and photocatalytic properties of the materials were evaluated by using methylene blue (MB) and Cr(VI) in single and mixture system. When the initial concentration of MB was 50 mg·L −1 , the photocatalytic degradation rate constant of NDI/MCr(2:1) was 10.3 and 13.8 times higher than that of NH 2 -MIL-101(Cr) and NDI/UZr(2:1), respectively. Additionally, NDI/MCr(2:1) exhibited 1.6 times higher reaction rate constant than that of NDI/UZr(2:1) for the removal of 10 mg∙L −1 Cr(VI). The enhanced adsorption and photocatalytic ability over NDI/MOFs were attributed to the MOFs larger specific surface area and wider spectral response, and NDI showed high electron affinity, superior charge carrier transport properties. Free radical and electron capture experiments indicated that h + , •O 2 − , and e − were the main active species in the NDI/MOFs system. Among them h + and •O 2 − played an essential role in the removal of MB, while e − and •O 2 − contributed to the photocatalytic reduction of Cr(VI). The mechanism of the photocatalytic process was discussed in detail.
研究领域:
材料科学
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环境工程
·
化学工程
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Ruoyun Li,Linbo Wu,Bo-Geng Li
In this work, PEG-mb-PPA (abbr.: PEGPA) copolymers were synthesized via chain extension/coupling of poly(ethylene glycol) (PEG) and poly(1,2-propylene adipate) (PPA) diols, and blends of commercial poly(l-lactide) (PLLA) and PEGPA were prepared via melt blending. The multiblock copolymers were characterized by 1H NMR and DSC, and the PLLA/PEGPA blends were characterized by DSC, SEM, tensile, and impact testing. Plasticization-dominant (elongation ∼250%), toughening-dominant (impact strength 33 kJ/m2), and plasticized-toughened (250%, 14 kJ/m2) blends were obtained by varying the composition and loading of PEGPA. The PLLA/PEGPA blends exhibited much more balanced mechanical properties in comparison with PEG-plasticized and PPA-toughened PLLAs, and the plasticization-dominant blends had superior performance stability in comparison with the PEG-plasticized PLLA. The SEM micrographs indicate that the immiscible PPA segment formed elongated microphases and acted as a toughener, whereas the miscible PEG segment acted as a plasticizer of PLLA and a compatibilizer of PPA. Such a synergistic effect of both segments was responsible for the balanced mechanical properties. The improved performance stability was attributed to the high molecular weight of the multiblock copolymers and the depressed crystallization of the PEG segment.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Fan Wang,Lijuan Zhang,Yeying Wang,Xijian Liu,Sohrab Rohani,Jie Lu
The graphene oxide (GO) functionalized by Fe 3 O 4 @SiO 2 @CS-TETA nanoparticles, Fe 3 O 4 @SiO 2 @CS-TETA-GO, was firstly fabricated in a mild way as a novel adsorbent for the removal of Cu(II) ions and methylene blue (MB) from aqueous solutions. The magnetic composites showed a good dispersity in water and can be conveniently collected for reuse through magnetic separation due to its excellent magnetism. When the Fe 3 O 4 @SiO 2 @CS- TETA-GO was used as an absorbent for the absorption of MB and Cu(II), the adsorption kinetics and isotherms data well fitted the pseudo-second-order model and the Langmuir model, respectively. Under the optimized pH and initial concentration, the maximum adsorption capacity was about 529.1 mg g −1 for MB in 20 min and 324.7 mg g −1 for Cu(II) in 16 min, respectively, exhibiting a better adsorption performance than other GO-based adsorbents reported recently. More importantly, the synthesized adsorbent could be effectively regenerated and repeatedly utilized without significant capacity loss after six times cycles. All the results demonstrated that Fe 3 O 4 @SiO 2 @CS-TETA-GO could be used as an excellent adsorbent for the adsorption of Cu(II) and MB in many fields.
研究领域:
环境科学
·
材料科学
✓ 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）