A novel and green heterogeneous photocatalytic system (Ca0.01Fe2.99O4/CaTiO3 nanocomposite): Protocol synthesis, characterization, and study of photo-decoloration activity

Kara, Gheffar Kh.; Moshari, Mahsa; Rabbani, Mahboubeh; Rahimi, Rahmatollah

doi:10.1016/j.matchemphys.2020.124062

Cited by 13 publications

(5 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So, we believed that all metallic nanofibers completely coated with metalized agent (whatever the amount of metalized agent) undoubtedly led to the formation of a coexistence structure. On the basis of abundant literature sources on this topic, 10,107,108 the combination of one structure within another structure constitutes the coexistence structures of great importance in the environmental applications of materials compounds, biological applications of fibers, chemical sensitivities and others.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4][5][6] The continuity of keeping pace with development lies in three fundamental aspects: (1) finding effective solutions to the crises facing developing countries, (2) investing time in the best way by selecting good protocols for the production of materials with high quality specifications and (3) observing the conditions of green chemistry to prevent the creation of any environmental danger to the environment or health on the work staff. 2,[6][7][8][9][10] Today, among the materials that occupy a large space in the field of technological developments and research studies, are polymers (both industrial and natural), due to their abundance, ease of handling, distinctive properties and other prominent virtues. Since Hermann Staudinger won the Nobel Prize in 1920 for his important discovery in polymeric materials to the present century, countless numbers of polymeric materials have been produced using a variety of manufacturing techniques.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A comparative investigation of the synergistic correlation (mechanical-hydrophobicity/hydrophilicity vs. structural behaviors) of a series of surface-metalized polyacrylonitrile fibers by silver nanoparticles (AgPAN): An in-situ surface metallization protocol

Kara

Esmaeili

Kehtari

et al. 2022

Journal of Industrial Textiles

View full text Add to dashboard Cite

Research problem The demand for polymeric materials is increasing day by day, provided that they have excellent virtues to meet desired needs. The best way to obtain high-quality polymeric materials was surface treatment in multiple methods. All the methods that have been used were expensive, multi-stage, harmful to the environment, and other shortages. Therefore, we sought in our paper to invent and develop a surface metallization protocol under green and safe conditions, based on integrating two safe methods for preparing nanomaterials (electrospinning/ultrasound) in one-pot. Aim of this work The main objective of this work is to answer a question that has been neglected in other papers: how does in-situ metallization affect the crystalline behavior of the semi-crystalline phase of the PAN matrix depending on different amounts of MA NPs and their synergy for the rest of the properties (morphological and structural) is presented, in first degree. In the second degree, an explanation of the synergy mechanism between the mechanical/hydrophilic properties and the modified structural properties of metalized fibers has explained. Results Here, an unaccustomed and green methodology to metalize the polyacrylonitrile, PAN, surface is reported with the intention of fashioning of a stable fibrous structure and the best specifications. The in-situ metallization process is essentially based on a loading of various amount of silver nanoparticles, as MA NPs “MA NPs”, (1 wt%, 4 wt%, 7 wt% and 10 wt%), which prepared by ultrasound irradiation assisted with a little amount of a reducer system (hydrazine/NaOH), on the PAN surface. The physiochemical characterization of as-synthesized fibrous samples was consisted of two parts: (i) characterization of sample nature (utilizing of XRD and UV-Vis. techniques), (ii) the chemical structure/morphological characterization (utilizing FESEM, TEM and AFM techniques) with performing all relevant measurements. From crystalline and UV-Vis. assessments, the observed shift in the diffraction peaks towards lower angles and slight shifts in the absorption bands of PAN (1 0 0) in the 1AgPAN and 4AgPAN samples, containing smaller-sized nanoparticles, are overt results of an improvement in the crystalline traits of the parent matrix. The FT-IR data revealed the intensification and overlapping of the IR-bands “C= N, C≡ N, N-H, C=O and O-H” without band shifting for fibrous samples with low content of MA NPs (1AgPAN and 4AgPAN samples). The intercalation of the MA NPs between the chains of the molecular matrix and the strong interconnection/hydrogen bonds between both components explain not only the change of the crystalline properties of the crystalline matrix but also the homogeneous distribution and creation of a stable layer of the MA NPs on the 0AgPAN surface, confirmed by the FESEM and TEM images. The results of the study of mechanical properties showed that the loading of small spherical particles onto the polymeric matric, in particular 1AgPAN and 4AgPAN samples, was positively reflected on the improvement of the mechanical performances and the related values, not in the 7AgPAN and 10AgPAN samples. Because the MA NPs have a hydrophobic character, loading them onto the bare polymeric fiber surface made the metalized fibers a stronger hydrophobic than that of hydrophilic character, which is consistent with differences in surface roughness (increasing Ra values). The main focus of this paper was to study the synergy of structural properties with each other. So, the results of the synergistic relationship study showed that the low amount of the MA NPs led to a comprehensive and positive correlation between all structural properties and in turn affected the mechanical properties-hydrophobic/hydrophilic properties. Noting that the fibers of the 1AgPAN and 4AgPAN samples had the best structural stability, compared to the fibers of the 0AgPAN, 7AgPAN and 10AgPAN samples, when they were: decreasing in Z value, increasing fiber diameter/particle size “P.S.”, increasing RCR and C.D. values and decreasing D.D, alteration in values obtained of the mechanical behavior and the increasing of contact angle “CA” values for water “H2O” droplets and decreasing for ethylene glycol “EG”. As a final result, the changes observed in the aforementioned measurements were reasonably regular and gradual for fibers with low MA NPs content, while the same measurements were significantly deteriorated in the case of fibers with higher MA NPs contents.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative investigation of the synergistic correlation (mechanical-hydrophobicity/hydrophilicity vs. structural behaviors) of a series of surface-metalized polyacrylonitrile fibers by silver nanoparticles (AgPAN): An in-situ surface metallization protocol

Kara

Esmaeili

Kehtari

et al. 2022

Journal of Industrial Textiles

View full text Add to dashboard Cite

show abstract

“…Active, selective, and recyclable heterogeneous catalysts are challenging goals that have great application prospects in the industry. There are many benefits to using heterogeneous catalysts for catalytic reactions, including easy separation from the reaction mixture, reduced wastes and eco-friendliness, high stability, and reusability . Polyoxometalates (POMs) as heterogeneous catalysts for the epoxidation of olefins display remarkable catalytic performance, selectivity, and easy separation.…”

Section: Introductionmentioning

confidence: 99%

“…There are many benefits to using heterogeneous catalysts for catalytic reactions, including easy separation from the reaction mixture, reduced wastes and ecofriendliness, high stability, and reusability. 5 Polyoxometalates (POMs) as heterogeneous catalysts for the epoxidation of olefins display remarkable catalytic performance, selectivity, and easy separation. However, in many cases, more catalysts are mainly affected by the leaching of POM species because of the strong complexing ability of oxidants (like H 2 O 2 ) and solvents which limits their practical application.…”

Section: Introductionmentioning

confidence: 99%

Dual-Ligand Strategy for the Design and Construction of a Cd–Zn Heterometallic Metal–Organic Framework by One-Pot Synthesis as a Heterogeneous Catalyst for the Epoxidation Reaction of Olefins

Karbalaee Hosseini,

Moghadaskhou,

Tadjarodi

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

“…This approach causes serious waste of resources and contamination of the environment (Stefan et al, 2022;Leal et al, 2019). Therefore, it is necessary to recycle waste dyed cotton textiles by trimming and decolorizing them into desirable colored fabrics (Kara et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Efficient decolorization of reactive dyed cotton fabric with a two-step NaOH/ Na 2 S 2 O 4 process

Wang

et al. 2023

Preprint

View full text Add to dashboard Cite

Waste cotton textiles can be decolorized with the NaOH/Na2S2O4 reducing system with mild and effective results. Nevertheless, this system consumes substantial amounts of Na2S2O4, resulting in an inefficient decomposition process. The present study proposed a two-step NaOH/Na2S2O4 method to decolorize the reactive-dyed cotton fabric. The decolorization mechanism of NaOH and Na2S2O4 was investigated based on the decolorization kinetics. The results showed that Na2S2O4 decolorized the dyed cotton fabric more quickly than NaOH. In the reduction system, the decolorization mechanism of NaOH and Na2S2O4 individually followed a three-order kinetic law. During the decolorization process, a hydrolysis reaction between NaOH and cotton fiber destroyed the covalent bond, and a reduction reaction between Na2S2O4 and the dye destroyed the chromophore. The two-step NaOH/Na2S2O4 method improved the decolorization of dyed cotton fabric by reducing the ineffective decomposition of Na2S2O4. Compared to traditional methods, the two-step method endowed the decolorized fabric with a 16% higher CIE L value. Notably, the decolorized cotton fabric retained about 90% of its breaking strength.

show abstract

A novel and green heterogeneous photocatalytic system (Ca0.01Fe2.99O4/CaTiO3 nanocomposite): Protocol synthesis, characterization, and study of photo-decoloration activity

Cited by 13 publications

References 63 publications

A comparative investigation of the synergistic correlation (mechanical-hydrophobicity/hydrophilicity vs. structural behaviors) of a series of surface-metalized polyacrylonitrile fibers by silver nanoparticles (AgPAN): An in-situ surface metallization protocol

A comparative investigation of the synergistic correlation (mechanical-hydrophobicity/hydrophilicity vs. structural behaviors) of a series of surface-metalized polyacrylonitrile fibers by silver nanoparticles (AgPAN): An in-situ surface metallization protocol

Dual-Ligand Strategy for the Design and Construction of a Cd–Zn Heterometallic Metal–Organic Framework by One-Pot Synthesis as a Heterogeneous Catalyst for the Epoxidation Reaction of Olefins

Efficient decolorization of reactive dyed cotton fabric with a two-step NaOH/ Na 2 S 2 O 4 process

Contact Info

Product

Resources

About