JOURNAL OF POROUS MATERIALS
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2020
·Vol. 28
·期 1
·109-116
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IF 2.183
Du Yue,Zhou Lina,Liu Zhenhui,Yang Lun
Highly ordered three-dimensional (3DOM) macroporous polyoxometalate (POM)-based zirconia hybrids with relatively high surface area and interconnected pore structure have been fabricated by colloidal crystal template method. Owing to the evenly distributed POM active sites, large-scaled 3D ordered macroporous structure, and high porosity of as-synthesized POM-based ZrO 2 composite, it exhibits excellent extractive-oxidative desulfurization activity and recyclability. 500 ppm of dibenzothiophene (DBT) in the model fuel can be removed within 2 h under mild conditions and no obvious loss of catalytic activity even after 20 times. The oxidative reaction of DBT follows pseudo-first-order kinetics, corresponded to an Arrhenius activation energy of 61.1 kJ/mol.
研究领域:
无机化学
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催化化学
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材料科学
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环境化学
·
能源化工
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DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2018
·Vol. 296
·期 7
·1267-1271
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IF 1.967
Li Siqi,Xu Dandan,Pan Ting,Wu Quanzhou,He Jianfeng
Three-dimensionally ordered macroporous microspheres (3DOMMs) with copolymer skeletons have been successfully fabricated using a colloidal crystal templating method. The spherical SiO 2 colloidal crystal was firstly self-assembled as template via the evaporation-induced self-assembly process in a water/oil suspension system. The 3DOMMs were obtained by sealing the silica colloidal crystal template with polyethylene glycol 1500 (PEG 1500) after the infiltration of the precursor into the interstice of the template. The compositions of the precursor had an important effect on the structural order and integrity of the 3DOMMs. The structural strength of the microspheres was obviously improved by adding 2-hydroxyethyl methacrylate (HEMA) and 3-(trimethoxysilyl)propyl methacrylate (KH570) into the precursor. The chromatographic column packed with the 3DOMMs showed higher permeability and lower backpressure compared with the column packed with the traditional bulk materials and was suitable for the fast chromatographic separation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Polymeric Materials and Polymeric Biomaterials
·
2017
·
IF 1.515
Yanan Zhang,Shaomei Huang,Dandan Xu,Jiansong Chen,Quanzhou Wu,Jianfeng He
A novel protein molecularly imprinted microsphere with three-dimensionally ordered macroporous (3DOM) structure has been successfully prepared with a combination of colloidal crystal template method and molecular imprinting technique by using bovine serum albumin as template, acrylamide as functional monomer, and N,N′-methylenebisacrylamide as crosslinker, respectively. SEM shows that the polymeric microspheres have a highly ordered three-dimensional interconnected macroporous structure with typical face-centered cubic lattice. The isothermal and kinetic adsorption behaviors of the polymer were investigated. Compared with the traditional bulk polymer, the 3DOM imprinted microspheres show higher binding rate constant, adsorption capability and specificity to template molecules.
研究领域:
材料科学
·
生物化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 16
·7792-7800
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IF 11.301
Tian Gan,Xinqiang Fan,Ye Liu,Chengyu Wang,Haoran Mei,Lijun Fan,Nianjun Hou,Yicheng Zhao,Yongdan Li
Ni/Ce0.8Sm0.2O1.9 (SDC) with a three-dimensionally ordered macroporous (3DOM) structure is prepared with poly(methyl methacrylate) as the template and characterized using X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, H2 temperature-programmed reduction, X-ray photoelectron spectroscopy and ultraviolet Raman spectroscopy. Lattice oxygen in 3DOM SDC shows a higher activity than that in hydrothermally synthesized bulk SDC. 3DOM SDC also exhibits a stronger interaction with Ni compared to bulk SDC, which facilitates the release of lattice oxygen and the formation of oxygen vacancies in SDC in a reducing atmosphere. Therefore, Ni/3DOM SDC shows a much higher catalytic activity for electrochemical oxidation than Ni/bulk SDC as the anode material of solid oxide fuel cells. With Ni/3DOM SDC as the anode, a cell supported by a 500 μm-thick SDC-carbonate composite electrolyte layer exhibits maximum power densities (Pmax) of 1.28 and 1.63 W cm−2 at 700 °C with H2 and methanol as fuels, respectively, more than twice the Pmax of a similar cell with a Ni/bulk SDC anode. The Ni/3DOM SDC anode also shows a high resistance to coking.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2017
·Vol. 43
·期 7
·3847-3858
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IF 1.369
Yang Chao,Wang Jian,Fan Hui-Ling
A series of 3DOM and non-3DOM metal oxide–silica composites were prepared and tested dynamically in a packed-bed reactor at room temperature to remove ethanethiol from a gas stream containing ethyl mercaptan in moist N 2. The obtained sorbents were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption–desorption techniques. The experimental results showed that the adsorption ability of different kinds of metal oxide–silica composites with 3DOM structure decreased in the sequence: 3D-CuO/SiO 2 > 3D-NiO/SiO 2 > 3D-Co 3 O 4 /SiO 2 > 3D-ZnO/SiO 2 . The best ratio of CuO to SiO 2 of 3DOM copper–silicon oxide sorbents for ethanethiol removal was found to be 1:2. The 3DOM structure could improve the removal activity of sorbents remarkably because of the high porosity with ordered interconnected macropores as well as the large surface area and high dispersion of CuO. It was also found that a moist atmosphere greatly benefited the adsorption of ethanethiol at ambient condition.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wanqi Tang,Yanyang Liu,Qingliang You,Xiaofang Yang,Guiying Liao,Dongsheng Wang,Ying Yan,Qigao Shang
The cobalt monoatomic catalyst with 3D ordered macropores structure (3DOM Co/NC) was prepared using the crystalline porous material ZIF-67 and SiO 2 as the precursor and template, and used to investigate the effect of its activation with peroxymonosulfate (PMS) on sulfamethoxazole (SMX) removal. The mesoporous structure mostly retained after ZIF-67 carbonisation, and the formation of new homogeneous macropores after the removal of the SiO 2 template, which greatly increases the surface area of the catalyst (429 m 2 g −1 ) and promotes long-range mass transfer. Additionally, Co monoatomic sites were formed in the porous skeleton, providing electrons that were utilised for the activation of PMS. This distinctive structure enables it to almost completely degrade of 20 ppm SMX within 3 min and show excellent catalytic degradation efficiency in a wide pH range (3.0–9.0) and high-salinity simulated wastewater (10–100 mM). In addition, the main ROS in the catalytic degradation process were explored as 1 O 2 and O •2- . Combined with the results of DFT calculations and product analyses, the active sites of SMX were predicted and the degradation pathways and mechanisms were inferred, confirming that the degradation process of SMX poses a low risk of toxicity to the environment. This study reveals that the addition of 3DOM Co/NC was more favourable for the activation of PMS for SMX degradation, which contributes to the development and improvement of advanced oxidation processes for environmental remediation.
研究领域:
环境科学
·
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Long-Jiang Wang,Hui-Ling Fan,Ju Shangguan,Eric Croiset,Zhongwei Chen,Hui Wang,Jie Mi
A series of novel zinc oxide–silica composites with three-dimensionally ordered macropores (3DOM) structure were synthesized via colloidal crystal template method and used as sorbents for hydrogen sulfide (H2S) removal at room temperature for the first time. The performances of the prepared sorbents were evaluated by dynamic breakthrough testing. The materials were characterized before and after adsorption using scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). It was found that the composite with 3DOM structure exhibited remarkable desulfurization performance at room temperature and the enhancement of reactive adsorption of hydrogen sulfide was attributed to the unique structure features of 3DOM composites; high surface areas, nanocrystalline ZnO and the well-ordered interconnected macroporous with abundant mesopores. The introduction of silica could be conducive to support the 3DOM structure and the high dispersion of zinc oxide. Moisture in the H2S stream plays a crucial role in the removal process. The effects of Zn/Si ratio and the calcination temperature of 3DOM composites on H2S removal were studied. It demonstrated that the highest content of ZnO could reach up to 73 wt % and the optimum calcination temperature was 500 °C. The multiple adsorption/regeneration cycles showed that the 3DOM ZnO–SiO2 sorbent is stable and the sulfur capacity can still reach 67.4% of that of the fresh sorbent at the fifth cycle. These results indicate that 3DOM ZnO–SiO2 composites will be a promising sorbent for H2S removal at room temperature.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Hui Wu,Liang Shi,Jiaheng Lei,Dan Liu,Deyu Qu,Zhizhong Xie,Xiaodi Du,Peng Yang,Xiaosong Hu,Junsheng Li,Haolin Tang
The development of efficient and durable catalyst for oxygen reduction reaction (ORR) is critical for the practical application of proton exchange membrane fuel cell (PEMFC). A novel imidazole based ionic liquid is synthesized in this study and used subsequently for the preparation of a N and S co-doped metal-free catalyst with three dimensional ordered microstructure. The catalyst prepared at 1100 °C showed improved ORR catalytic performance and stability compared to commercial Pt/C catalyst. We demonstrate that the high graphitic N content and high degree of graphitization of the synthesized catalyst is responsible for its superb ORR activity. Our results suggest that the N and S co-doped metal-free catalyst reported here is a promising alternative to traditional ORR catalyst based on noble metal. Furthermore, the current study also demonstrate that importance of morphology engineering in the development of high performance ORR catalyst.
研究领域:
电催化
·
能源材料
·
纳米材料
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物理化学
·
燃料电池
✓ 已验证
DOI
高影响因子
DRUG DEVELOPMENT AND INDUSTRIAL PHARMACY
·
2016
·
IF 2.429
Yikun Gao,Yuling Xie,Hongrui Sun,Qinfu Zhao,Xin Zheng,Siling Wang,Tongying Jiang
Objective: To explore the effect of the pore size of three-dimensionally ordered macroporous chitosan–silica (3D-CS) matrix on the solubility, drug release, and oral bioavailability of the loaded drug.Methods: 3D-CS matrices with pore sizes of 180 nm, 470 nm, and 930 nm were prepared. Nimodipine (NMDP) was used as the drug model. The morphology, specific surface area, and chitosan mass ratio of the 3D-CS matrices were characterized before the effect of the pore size on drug crystallinity, solubility, release, and in vivo pharmacokinetics were investigated.Results: With the pore size of 3D-CS matrix decreasing, the drug crystallinity decreased and the aqueous solubility increased. The drug release was synthetically controlled by the pore size and chitosan content of 3D-CS matrix in a pH 6.8 medium, while in a pH 1.2 medium the erosion of the 3D-CS matrix played an important role in the decreased drug release rate. The area under the curve of the drug-loaded 3D-CS matrices with pore sizes of 930 nm, 470 nm, and 180 nm was 7.46-fold, 5.85-fold, and 3.75-fold larger than that of raw NMDP respectively.Conclusion: Our findings suggest that the oral bioavailability decreased with a decrease in the pore size of the matrix.
研究领域:
药剂学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）