Dependence of Porosity of Amorphous Silicon Dioxide Prepared from Rice Straw on Plant Variety

Земнухова, Л. А.; Панасенко, А. Е.; Artemyanov, Andrey P.; Tsoy, Elena A.

doi:10.15376/biores.10.2.3713-3723

Cited by 33 publications

(19 citation statements)

References 14 publications

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“…The aromatic ring group is also found in the region of 800 cm −1 and 833 cm −137 . The presence of silica is indicated by the Si-O-Si bending region (458-561 cm −1 ) and the bands from 950-1000 cm −1 of Si-O-Si asymmetric stretching [38][39][40] . Figure 3a,b also illustrates that except for the domination of the absorption bands from 3000-3500 cm −1 , the spectra of the precipitates from pH 10 to 8 are significantly affected by silica bands.…”

Section: Clarification Of Chemical Structure Ft-ir Analysismentioning

confidence: 99%

The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

Nghị

Pham

et al. 2020

Sci Rep

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Difficulties in the production of lignin from rice straw because of high silica content in the recovered lignin reduce its recovery yield and applications as bio-fuel and aromatic chemicals. Therefore, the objective of this study is to develop a novel method to reduce the silica content in lignin from rice straw more effectively and selectively. The method is established by monitoring the precipitation behavior as well as the chemical structure of precipitate by single-stage acidification at different pH values of black liquor collected from the alkaline treatment of rice straw. The result illustrates the significant influence of pH on the physical and chemical properties of the precipitate and the supernatant. The simple two-step acidification of the black liquor at pilot-scale by sulfuric acid 20w/v% is applied to recover lignin at pH 9 and pH 3 and gives a percentage of silica removal as high as 94.38%. Following the developed process, the high-quality lignin could be produced from abundant rice straw at the industrial-scale.

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Section: Clarification Of Chemical Structure Ft-ir Analysismentioning

confidence: 99%

The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

Nghị

Pham

et al. 2020

Sci Rep

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“…The similarity of the positions when compared NP-PIMs with M1 reveal that Aliquat 336 stays entrapped in the polymeric matrix without any chemical change (negligible effect) associated to the presence of the diverse NP. The absorption band at 797 cm −1 in Figure 5 c) can be assigned to the stretching and deformation vibrations of Si-O-Si siloxane bonds [38]. Other characteristic bands, for example the Fe-O bond at 580 cm −1 and 634 cm −1 [39,40], and the peak at 690 cm −1 assigned to Ti-O stretching bands [41], could not be observed in the corresponding NP-PIMs.…”

Section: Np-pim Characterizationmentioning

confidence: 99%

Preparation and Characterization of Nanoparticle-Doped Polymer Inclusion Membranes. Application to the Removal of Arsenate and Phosphate from Waters

et al. 2021

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Nanoparticle-doped polymer inclusion membranes (NP-PIMs) have been prepared and characterized as new materials for the removal of arsenate and phosphate from waters. PIMs are made of a polymer, cellulose triacetate (CTA), and an extractant, which interacts with the compound of interest. We have used the ionic liquid (IL) trioctylmethylammonium chloride (Aliquat 336) as the extractant and have investigated how the addition of nanoparticles can modify membrane properties. To this end, inorganic nanoparticles, such as ferrite (Fe3O4), SiO2 and TiO2, and multiwalled carbon nanotubes (MWCNTs), were blended with the polymer/extractant mixture. Scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), and contact angle measurements have been used to characterize the material. Moreover, PIM stability was checked by measuring the mass loss during the experiments. Since Aliquat 336 acts as an anion exchanger, the NP-PIMs have been explored in two different applications: (i) as sorbent materials for the extraction of arsenate and phosphate anions; (ii) as an organic phase for the separation of arsenate and phosphate in a three-phase system. The presence of oleate-coated ferrite NP in the PIM formulation represents an improvement in the efficiency of NP-PIMs used as sorbents; nevertheless, a decrease in the transport efficiency for arsenate but not for phosphate was obtained. The ease with which the NP-PIMs are prepared suggests good potential for future applications in the treatment of polluted water. Future work will address three main aspects: firstly, the implementation of the Fe3O4-PIMs for the removal of As(V) in real water containing complex matrices; secondly, the study of phosphate recovery with other cell designs that allow large volumes of contaminated water to be treated; and thirdly, the investigation of the role of MWCNTs in PIM stability.

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“…17,18 The peak at 479 cm -1 can also be assigned to O-Si-O bending vibrations. 19,20 Peaks located within the wavenumbers of 360-300 cm -1 can be assigned to calcium oxide. 21 In both spectral regions, 3-day exfoliated particles showed the greater spectral intensity of the peaks when particles were exfoliated in glycerol rather than water, indicating that smaller particles were achieved in a shorter time using glycerol.…”

Section: Figurementioning

confidence: 99%

Studies into Exfoliation and Coating of Egyptian Blue for Application to the Detection of Latent Fingermarks

Shahbazi¹,

Goodpaster²,

Smith³

et al. 2020

Preprint

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We have recently demonstrated that exfoliated Egyptian blue powder coated with cetrimonium bromide is effective for detecting latent fingermarks on a range of highly-patterned non-porous surfaces (see reference). In this extension of that work, we here present our preliminary studies into alternative approaches to preparing exfoliated Egyptian blue with a variety of different coatings. The various powders were then applied to the detection of latent fingermarks on non-porous surfaces. This proof of concept study demonstrated that there is potential improvement in performance compared to our previous work, however more comprehensive studies are required to compare the quality of the fingermarks developed with these powders against particles exfoliated in water.

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Dependence of Porosity of Amorphous Silicon Dioxide Prepared from Rice Straw on Plant Variety

Cited by 33 publications

References 14 publications

The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

Preparation and Characterization of Nanoparticle-Doped Polymer Inclusion Membranes. Application to the Removal of Arsenate and Phosphate from Waters

Studies into Exfoliation and Coating of Egyptian Blue for Application to the Detection of Latent Fingermarks

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