N2 adsorption– desorption

In this study, the rGO aerogel material was successfully fabricated by freeze-drying combined with high-temperature reduction method. The characteristics of rGO aerogel were investigated by modern techniques such as SEM-EDX, XRD, Raman, N2 adsorption and desorption.

6p visergeyne 18-06-2024 0 0   Download

The HKUST-1 was synthesized through a straightforward methodology, and its structure was confirmed by various characterization employing a range of techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM) with Energy Dispersive X-ray analysis (EDX), and N2 adsorption/desorption.

8p viambani 18-06-2024 3 0   Download

In this work, a bimetallic Ni-Cu-BDC metal-organic framework system was developed via solvent thermal approach with using an organic ligand recycled from waste plastic. The physical properties of Cu-BDC and bimetallic Ni-Cu-BDC were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and N2 isotherms adsorption-desorption (BET).

6p dianmotminh02 03-05-2024 3 1   Download

This study investigates the effect of synthesis methods on the physicochemical properties and catalytic activity of α-MnO2 catalysts in the complete oxidation of isopropanol. The catalysts were synthesized via redox-precipitation reactions by using dropwise and reflux methods and characterized by XRD, SEM, and N2 adsorption-desorption.

4p visteverogers 23-06-2023 11 3   Download

In this work, magnetic framework composite MgFe2O4@UiO-66(Zr)-NH2 was effectively fabricated via hydrothermal approach. The obtained samples were characterized by fieldemission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HR-TEM), powder X-ray diffraction (PXRD), diffuse reflectance spectroscopy (DRS), and N2 adsorption– desorption.

7p viargus 03-03-2023 2 2   Download

Ordered mesoporous FDU-12 silica particles with different morphologies were synthesized by varying the stirring rate. The mesoporous structure and textural properties of the FDU-12 samples were characterized by N2 adsorption and desorption, scanning electron microscopy, transmission electron microscopy and small angle X-ray scattering.

6p vironald 15-12-2022 7 2   Download

Titanosilicate ferrierite zeolite (FER) and its delaminated form (ITQ-6), with various Si/Ti molar ratios, were synthetized and tested as catalysts for diphenyl sulfide (Ph2S) and dimethyl sulfide (DMS) oxidation with H2O2. The zeolites were characterized with respect to their chemical composition (ICP-OES), structure (XRD, UV–vis DRS) and texture (low-temperature N2 adsorption-desorption).

9p vironald 15-12-2022 7 2   Download

In this study, iron doped MIL-53(Al) metal-organic framework material (denoted as Fe/MIL-53(Al)) was prepared by hydrothermal method. The obtained materials were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), thermogravimetry analysis (TG), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), and N2 adsorption/ desorption isotherms.

9p viwilliamleiding 10-12-2021 23 1   Download

Vanadium oxides, as highly efficiently catalysts, are widely applied in various catalytic reactions, such as the dehydrogenation of light alkanes and epoxidation of alkenes. In this paper, a series of VOx/Al2O3 catalysts were fabricated by the 1-pot method for catalytic propane dehydrogenation. The results indicated that the VOx/Al2O3 catalysts with loading of 10 wt.% vanadium exhibited optimized catalytic performance.

14p tudichquannguyet 29-11-2021 12 1   Download

In this study, the carbon nanotube supported gold, bismuth, and gold-bismuth (Au/MWCNT, Bi/MWCNT, and Au-Bi/ MWCNT) nanocatalysts were prepared with NaBH4 reduction method at varying molar atomic ratio for glucose electrooxidation (GAEO). The synthesized nanocatalysts at different Au: Bi atomic ratios are characterized via x-ray diffraction (XRD), transmission electron microscopy (TEM), and N2 adsorption-desorption.

17p tudichquannguyet 29-11-2021 8 2   Download

Ordered SBA-15 mesoporous silica support was synthesized by a sol-gel method using triblock copolymer Pluronic P123 and immobilized with different amounts of photocatalyst TiO2. The synthesized composites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and N2 adsorption-desorption isotherms. The synthesized materials possessed specific surface areas SBET of 768 m2 /g, 544 m2 /g, 421 m2 /g and 333 m2 /g at the TiO2:SiO2 ratio of 0, 0.25, 1.0 and 5.0, respectively.

7p angicungduoc5 13-06-2020 14 1   Download

CuO-ZnO nanoparticles were successfully synthesized by the sol-gel method. Characteristic properties of the synthesized nanoparticles were investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), N2 adsorption/desorption isotherms, and BJH pore diameter distributions. The formation of highly crystalline CuO and ZnO was confirmed by XRD. FT-IR confirmed that Zn-O and Cu-O bonds were formed in the material.

6p 12120609 02-04-2020 6 0   Download

Mesoporous SiO2 and ZnO•SiO2 composite (10 wt.% of SiO2) were prepared from rice husk for removal of organic dye (Janus Green B, JGB). As-prepared samples were characterized by XRD, FE-SEM, FT-IR, and N2 adsorption/desorption isotherms.

7p viminotaur2711 29-10-2019 19 2   Download

In this study, the CuO/MgO composite was prepared by co-precipitation method, as-prepared samples were characterized by SEM, TEM, XRD and N2 adsorption/desorption isotherms. The removal of tartrazine from aqueous solution by CuO/MgO/H2O2/UV was investigated and compared to other systems with/without H2O2 and UV irradiation.

6p trangcham1896 10-12-2018 28 1   Download

In this study, Fe2O3/SiO2 composite was prepared by incipient impregnation method for degradation of tartrazine dye from aqueous solution by heterogeneous Fenton-like process. As-synthesized sample was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N2 adsorption– desorption isotherm. The results indicated that iron impregnation (7 wt.%) did not significantly change specific area but it leads to a clear change in the porous structure of silica.

8p bautroibinhyen211 26-11-2018 38 1   Download

Isotherms, thermodynamics and kinetics of rhodamine B dye adsorption on natural diatomite. In this paper, Phu Yen diatomite was used as adsorbent for adsorption rhodamine B (RB) dye in aqueous solution. Analysis methods, including SEM, XRD, FT -IR, and N2 adsorption-desorption isotherms, were used to characterise the adsorbent.

8p dangthitrangtrang 10-05-2018 53 3   Download

Nanoparticle of Perovskite La1-xSrxCoO3 (x = 0, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7) were prepared by using citric acid sol-gel method. The structure and morphology of products were investigated by X-ray difraction (XRD) and transmission electron microscopy (TEM). The specific surface area (BET) was determined by N2 adsorption/desorption at 77 K. The catalytic oxidation of propene and removal NOx were studied by Temperature Program Surface Reaction (TPSR) over every compositions. The results show that the contened of substituted ion Sr2+ influenced on the oxidation temperature of propene.

6p uocvong01 24-09-2015 58 2   Download

Catalytic oxidation of m-xylene was carried out over the copper oxide catalyst loaded on SiO2 300 m2/g. The various techniques were used to characterize the catalysts x-ray diffraction, TPRH2, N2 adsorption-desorption, scanning electron microscopy (SEM), tranmission electron microscopy (TEM) and CO pulse chemisorptions. The results indicate that the impregnated solution concentration exerts an influence on the catalytic activity.

6p uocvong01 24-09-2015 49 3   Download

In this work, platinum nanoparticles were dispersed on SBA-15 mesoporous material by incipient wetness method and the synthesized materials were characterized by XRD, TEM, EDX spectroscopies and N2 adsorption-desorption isotherm measurement. The results indicated that 2D hexagonal ordered structure of SBA-15 was still maintained after grafting Pt on SBA-15 support and platinum nanoparticles existed both inside and outside the pore channels of SBA-15 material. Catalytic activity of these materials was tested in the aqueous phase D-glucose oxidation as a model reaction. ...

8p tuanlocmuido 13-12-2012 52 3   Download