A New Procedure for Porous Material Characterization

Chilev, Chavdar

doi:10.11648/j.ijsts.20170504.22

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…The presence of typical patterns of ZnCl2 and HNO3 suggested that the washing process should be improved. The SEM images in Figure 3 provide surface morphology and pore size of the samples [21]. It can be seen that the activated carbon (CEA) sample formed few microporous.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Activated Carbon from Sago Waste (Metroxylon sagu) with ZnCl2 Activation and HNO3 Modification

2019

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Previous researches have shown that activated carbon could be made from various raw materials which contain lignocellulose. The aims of this research were to synthesis and characterize the activated carbon obtained from lignocellulose contained in sago waste. The synthesis was conducted through multiple stages of dehydration, carbonization, silica extraction with NaOH, activation by ZnCl2 10%, and surface modification using HNO3 65%, successively. From X-ray fluorescence, it was confirmed that treatment with NaOH removed practically all silica content from the sample with only 1 wt% left. The X-ray diffraction patterns showed that the samples have amorphous structures before the modification and started to form exfoliated graphite crystals, as shown by the peaks at 2θ 30.27° and 35.10°. The significant result was obtained from the series of processes of carbonization, extraction, activation, and modification using 1.5 mL of HNO3 (CEA 1.5), which produced nanoporous particles with regular homogeneous shapes in the range of 200 nm in size as shown by scanning electron images. Finally, the infrared spectra from activated and modified samples confirmed that the oxygen-containing groups had increased.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Activated Carbon from Sago Waste (Metroxylon sagu) with ZnCl2 Activation and HNO3 Modification

2019

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“…This geometry is expected for the TiO 2 particles Guo D et al, 2020;Pan K et al, 2011;Barbé CJ et al,1997;Ni M et al, 2006). To obtain the information about the average diameter and the porous distribution, the software ImageJ, broadly used in research, was applied (Figure 5a, b and c, Table 1) (Chilev C et al 2017).…”

Section: Sem (Scanning Electron Microscopy) and Eds (Energy Dispersiv...mentioning

confidence: 98%

Effect of the Performance of Lignin Into the Matrix of the TiO2 with Application on DSSCs

Teixeira,

Nunes,

Pinho

et al. 2022

Floresta Ambient.

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Founding new materials and structures for solar cells is a challenge in the photovoltaic field. This work evaluated the effect of the lignin in the photovoltaic activity by compounding with TiO 2 /lignin as photoanode for the dye sensitized solar cells (DSSC's). Hybrid films (TiO 2 /lignin) with different concentrations of lignin (5, 10 and 15%) were deposited by spin coating over commercial TiO 2 thin films. The cells were sandwich assembled. The characterizations were done through analysis of absorbance, band gap, x-ray diffraction, morphological and electrical. The lignin at 15% reduced the TiO 2 band gap from 3.66 to 2.84 eV, favoring the short current density to 11.06 mA/cm 2 and efficiency of 4.65%, an increase of 103.95% compared to the TiO 2 structure without lignin.

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“…In application of powder plasma coating, controlling the microstructural parameters of the coating, such as the desired structural-phase composition, the required porosity and morphology are of significance. In many cases, the study of the structure of coatings, for example, their * corresponding author; e-mail: dalontseva@mail.ru porosity is carried out using scanning microscopy [5,6]. One of the main methods of analysis of the structuralphase composition of coatings, is using the X-ray diffraction [7,8].…”

Section: Introductionmentioning

confidence: 99%

The Application of Transmission Electron Microscopy to the Analysis of Powder Coatings Deposited on Metal Substrates by Plasma Method

2019

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This paper presents the experimental techniques of transmission electron microscopy of plasma-spray powder alloy coatings. It includes the specimen preparation techniques for powder materials and for plasma spray powder coatings from the nickel-chromium-based alloy and synthetic hydroxyapatite (HA) and the analysis of the results. The study of the structure-phase compositions of HA powders and HA and Ni-Cr-based plasma spray coatings has been carried out by using transmission electron microscopy on JEM-2100 (JEOL), and by X-ray diffraction (XRD) on X'Pert PRO diffractometer (PANalytical, the Netherlands). It has been established that the coatings have the desired structure-phase composition as a result of the selection of specific modes of plasma spraying and additional plasma treatment. The advantages and challenges of application of TEM method for analyzing the structure of thick (up to 300 µm) powder coatings deposited by plasma spraying methods onto metal substrates are investigated.

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A New Procedure for Porous Material Characterization

Cited by 5 publications

References 19 publications

Synthesis and Characterization of Activated Carbon from Sago Waste (Metroxylon sagu) with ZnCl2 Activation and HNO3 Modification

Synthesis and Characterization of Activated Carbon from Sago Waste (Metroxylon sagu) with ZnCl2 Activation and HNO3 Modification

Effect of the Performance of Lignin Into the Matrix of the TiO2 with Application on DSSCs

The Application of Transmission Electron Microscopy to the Analysis of Powder Coatings Deposited on Metal Substrates by Plasma Method

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