A novel and economical approach for the synthesis of short rod-shaped mesoporous silica nanoparticles from coal fly ash waste by Bacillus circulans MTCC 6811

Yadav, Virendra Kumar; Amari, Abdelfattah; Mahdhi, Noureddine; Elkhaleefa, Abubakr M.; Fulekar, M. H.; Patel, Ashish

doi:10.1007/s11274-023-03734-w

Cited by 8 publications

(6 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The TiO 2 NPs synthesized by any route can be easily characterized by using UV-Vis spectrophotometry, Fourier transform infrared, X-ray diffraction, and electron microscopy for the confirmation of the formation of TiO 2 NPs, elemental composition, and purity (Agarwal et al, 2022 ; Yadav et al, 2023b ). Characterization of TiO 2 NPs also becomes important to reveal the phase of the synthesized TiO 2 NPs, as they may exist in three different forms under different physical and chemical conditions (Rathi and Jeice, 2023 ).…”

Section: Characterization Of Tio 2 Npsmentioning

confidence: 99%

“…The metal oxide NPs include titanium dioxide (TiO 2 ) (Kiwi et al, 2014), zinc oxide (ZnO) (Modi et al, 2022a(Modi et al, , 2023bOnyszko et al, 2022), iron oxide (Fe 2 O 3 /Fe 3 O 4 ) (Pan et al, 2022;Yadav et al, 2023a), magnesium oxide (MgO) (Dabhane et al, 2022), copper oxide (CuO) (Maliki et al, 2022), alumina (Al 2 O 3 ), and many more (Ravichandran, 2010;Guerra et al, 2018). Among non-metallic ones, the most prominent are silica oxide (SiO 2 ) (Huang et al, 2022;Yadav et al, 2023c), graphene, and carbon nanotubes (CNTs) (Guerra et al, 2018). Out of all the metal oxides, ZnO and TiO 2 have gained a lot of attention in recent years due to their photocatalytic properties (Wang et al, 2021a;Zhao et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Rathore,

Yadav,

Gacem

et al. 2023

Front. Microbiol.

Self Cite

View full text Add to dashboard Cite

Nanotechnology (NT) and nanoparticles (NPs) have left a huge impact on every field of science today, but they have shown tremendous importance in the fields of cosmetics and environmental cleanup. NPs with photocatalytic effects have shown positive responses in wastewater treatment, cosmetics, and the biomedical field. The chemically synthesized TiO2 nanoparticles (TiO2 NPs) utilize hazardous chemicals to obtain the desired-shaped TiO2. So, microbial-based synthesis of TiO2 NPs has gained popularity due to its eco-friendly nature, biocompatibility, etc. Being NPs, TiO2 NPs have a high surface area-to-volume ratio in addition to their photocatalytic degradation nature. In the present review, the authors have emphasized the microbial (algae, bacterial, fungi, and virus-mediated) synthesis of TiO2 NPs. Furthermore, authors have exhibited the importance of TiO2 NPs in the food sector, automobile, aerospace, medical, and environmental cleanup.

show abstract

Section: Characterization Of Tio 2 Npsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Rathore,

Yadav,

Gacem

et al. 2023

Front. Microbiol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, amorphous silica may be the product that prevents acid diffusion into the core of the unleached mullite. Table 4 shows the chemical composition of the solid residue obtained after 30 min of leaching at 170 • C. It can be seen that the solid residue is mainly composed of silicon and can be used to produce silica white [35][36][37] or silicon carbide ceramics [38][39][40]. 9a).…”

Section: Solid Residue Characterisationmentioning

confidence: 99%

Kinetics of Aluminum and Scandium Extraction from Desilicated Coal Fly Ash by High-Pressure HCl Leaching

Shoppert,

Valeev,

Loginova

2023

Metals

View full text Add to dashboard Cite

Coal fly ash (CFA) is a waste that forms via coal combustion in thermal power stations. CFA consists of numerous components, whose recovery can address environmental and resource concerns associated with sustainable development. Most of the alumina (Al2O3) and rare-earth elements (REEs) in CFA are contained in the amorphous glassy mass and in the refractory mullite phase (3Al2O3·SiO2), which can be dissolved only using high-pressure acid leaching (HPAL). In this paper, the method of preactivation of CFA by treatment with a highly concentrated NaOH solution is used to increase the efficiency of Al and Sc extraction during HPAL. This method allows for the elimination of an inert aluminosilicate layer from the surface of mullite, transferring the REEs into an acid-soluble form. The Al and Sc extraction can reach 80% after HCl HPAL at T = 170 °C and a 90 min duration. According to the kinetic data, the dissolution of Al follows the surface chemical reaction and intraparticle diffusion shrinking core models in the initial and later stages of leaching, respectively. A high activation energy of 52.78 kJ mol−1 was observed at low temperatures, and a change in the mechanism occurred after 170 °C when the activation energy decreased to 26.34 kJ mol–1. The obtained activation energy value of 33.51 kJ mol−1 for Sc leaching indicates that diffusion has a strong influence at all studied temperatures. The residue was analysed by SEM-EDX, XRF, BET, and XRD methods in order to understand the mechanism of DCFA HPAL process.

show abstract

“…In addition to this, the microorganism produces various biomolecules that may act as a capping and stabilizing agent for the formed TiO 2 NPs so there is no need for the addition of surfactants or capping agents from outside, thus reducing further cost ( Lin et al, 2021 ). Due to all these positive features of microbial synthesis of TiO 2 NPs, it has become a popular technique among investigators in the last couple of decades ( Yadav et al, 2023b ). By applying microbial approaches TiO 2 NPs could be synthesized by using bacteria ( Farag et al, 2021 ), actinomycetes ( Priyaragini et al, 2014 ), algae ( Mathivanan et al, 2023 ), and fungi ( Tarafdar et al, 2013 ; Survase and Kanase, 2023 ) but, out of these bacteria is most preferred due to their short generation time, easy to grow and handle.…”

Section: Introductionmentioning

confidence: 99%

“…Some of the above-mentioned techniques generate secondary pollutants or by-products which may further contaminate the environment. There are several economical adsorbents that are widely exploited for the removal of dyes from wastewater for instance, coal fly ash (Umejuru et al, 2021;Yadav et al, 2023d), incense sticks ash (Jain et al, 2020;Yadav et al, 2021), activated carbon (Balarak et al, 2021;Yilmaz et al, 2022), rice husk (Das et al, 2022), zeolites (de Gennaro et al, 2020;Murukutti and Jena, 2022), alumina, activated sludge, silica (Yadav et al, 2023c), etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

Rathore,

Yadav,

Amari

et al. 2024

Front. Bioeng. Biotechnol.

Self Cite

View full text Add to dashboard Cite

Over the last decade there has been a huge increase in the green synthesis of nanoparticles. Moreover, there is a continuous increase in harnessing the potential of microorganisms for the development of efficient and biocompatible nanoparticles around the globe. In the present research work, investigators have synthesized TiO2 NPs by harnessing the potential of Bacillus subtilis MTCC 8322 (Gram-positive) bacteria. The formation and confirmation of the TiO2 NPs synthesized by bacteria were carried out by using UV-Vis spectroscopy, Fourier transforms infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDX/EDS). The size of the synthesized TiO2 NPs was 80–120 nm which was spherical to irregular in shape as revealed by SEM. FTIR showed the characteristic bands of Ti-O in the range of 400–550 cm−1 and 924 cm−1 while the band at 2930 cm−1 confirmed the association of bacterial biomolecules with the synthesized TiO2 NPs. XRD showed two major peaks; 27.5° (rutile phase) and 45.6° (anatase phase) for the synthesized TiO2 NPs. Finally, the potential of the synthesized TiO2 NPs was assessed as an antibacterial agent and photocatalyst. The remediation of Methylene blue (MB) and Orange G (OG) dyes was carried out under UV- light and visible light for a contact time of 150–240 min respectively. The removal efficiency for 100 ppm MB dye was 25.75% and for OG dye was 72.24% under UV light, while in visible light, the maximum removal percentage for MB and OG dye was 98.85% and 80.43% respectively at 90 min. Moreover, a kinetic study and adsorption isotherm study were carried out for the removal of both dyes, where the pseudo-first-order for MB dye is 263.269 and 475554.176 mg/g for OG dye. The pseudo-second-order kinetics for MB and OG dye were 188.679 and 1666.667 mg/g respectively. In addition to this, the antibacterial activity of TiO2 NPs was assessed against Bacillus subtilis MTCC 8322 (Gram-positive) and Escherichia coli MTCC 8933 (Gram-negative) where the maximum zone of inhibition in Bacillus subtilis MTCC 8322 was about 12 mm, and for E. coli 16 mm.

show abstract

A novel and economical approach for the synthesis of short rod-shaped mesoporous silica nanoparticles from coal fly ash waste by Bacillus circulans MTCC 6811

Cited by 8 publications

References 74 publications

Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Kinetics of Aluminum and Scandium Extraction from Desilicated Coal Fly Ash by High-Pressure HCl Leaching

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

Contact Info

Product

Resources

About