scholarly journals Green synthesis of porous N-Carbon/Silica nanofibers by solution blow spinning and evaluation of their efficiency in dye adsorption

2020 ◽  
Vol 9 (3) ◽  
pp. 3038-3046 ◽  
Author(s):  
Rosiane Maria da Costa Farias ◽  
Mariaugusta Ferreira Mota ◽  
Lucas Leite Severo ◽  
Eliton Souto de Medeiros ◽  
Artur P. Klamczynski ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Dye Adsorption ◽  
Solution Blow Spinning ◽  
Silica Nanofibers

Controllable and green synthesis of robust graphene aerogels with tunable surface properties for oil and dye adsorption

2018 ◽  
Vol 42 (2) ◽  
pp. 1003-1009 ◽  
Author(s):  
Lijuan Qiu ◽  
Wenchao Wan ◽  
Zhongqiu Tong ◽  
Ruiyang Zhang ◽  
Lina Li ◽  
...  
Keyword(s):  
Vitamin C ◽  
Green Synthesis ◽  
Surface Properties ◽  
Dye Adsorption ◽  
Graphene Aerogels

Robust graphene aerogels with tunable surface properties are hydrothermally prepared using vitamin C at different pHs for oil and dye adsorption.

scholarly journals Solution Blow Spun Silica Nanofibers: Influence of Polymeric Additives on the Physical Properties and Dye Adsorption Capacity

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3135
Author(s):  
Rosiane Maria da Costa Farias ◽  
Lucas Leite Severo ◽  
Artur P. Klamczynski ◽  
Eliton Souto de Medeiros ◽  
Lisiane Navarro de Lima Santana ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Physical Properties ◽  
Porous Silica ◽  
Dye Adsorption ◽  
Silica Particles ◽  
Simple Method ◽  
Polymeric Additives ◽  
High Fraction ◽  
Silica Nanofibers ◽  
Pore Properties

The physical properties of porous silica nanofibers are an important factor that impacts their performance in various applications. In this study, porous silica nanofibers were produced via solution blow spinning (SBS) from a silica precursor/polymer solution. Two polyvinylpyrrolidone (PVP, Mw = 360,000 and 1,300,000) were chosen as spinning aids in order to create different pore properties. The effect of their physical properties on the adsorption of methylene blue (MB) in an aqueous solution was explored. After forming, the nanofibers were calcined to remove the organic phase and create pores. The calcined nanofibers had a large amount of micro and mesopores without the use of additional surfactants. The molecular weight of the PVP impacted the growth of silica particles and consequently the pore size. High Mw PVP inhibited the growth of silica particles, resulting in a large volume of micropores. On the other hand, silica nanofibers with a high fraction of mesopores were obtained using the lower Mw PVP. These results demonstrate a simple method of producing blow spun silica nanofibers with defined variations of pore sizes by varying only the molecular weight of the PVP. In the adsorption process, the accessible mesopores improved the adsorption performance of large MB molecules.

Evaluation of Processing Parameters in the Synthesis of Silica Nanofibers Doped with Silver by the Solution Blow Spinning Method

2019 ◽  
Vol 958 ◽  
pp. 135-140
Author(s):  
Braga Aluska do Nascimento Simões ◽  
Valdeci Bosco dos Santos ◽  
Gomes Déborah dos Santos ◽  
Simões Veruska do Nascimento ◽  
Neves Gelmires de Araújo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Silver Content ◽  
Technological Development ◽  
Processing Parameters ◽  
Ceramic Fibers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solution Blow Spinning ◽  
Silica Nanofibers ◽  
Scanning Electron

The ceramic fibers can be obtained from different techniques. Due to the technological development, searches are performed to improve the existing fibers. Thus, recent studies have enabled the development of an unprecedented synthesis route for the production of nanofibers, the Solution Blow Spinning (SBS). In this context, the present work proposes to develop silica nanofibers doped with silver by the SBS method, evaluating parameters such as: silver content and acidification of solutions. The fibers were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The results of XRD showed that the samples with 4% silver that were not acidified showed the most defined and intense characteristic peaks. The SEM showed the formation of fibers with diameters in the nanometer range independent of acidification or not of the solutions, with reduction of the agglomerates in the samples with 2% silver.

Green synthesis of Fe3O4 nanoparticles with controlled morphologies using urease and their application in dye adsorption

2014 ◽  
Vol 43 (33) ◽  
pp. 12474-12479 ◽  
Author(s):  
Haitang Shi ◽  
Longfei Tan ◽  
Qijun Du ◽  
Xue Chen ◽  
Linlin Li ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Fe3o4 Nanoparticles ◽  
Dye Adsorption ◽  
Green Method

This paper describes a green method which employs urease for the preparation of Fe3O4 nanoparticles, and explores their application in dye adsorption.

Tuning porous silica nanofibers by colloid electrospinning for dye adsorption

2014 ◽  
Vol 313 ◽  
pp. 389-395 ◽  
Author(s):  
Chaojie Wu ◽  
Wei Yuan ◽  
Salem S. Al-Deyab ◽  
Ke-Qin Zhang
Keyword(s):  
Porous Silica ◽  
Dye Adsorption ◽  
Silica Nanofibers
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