Green synthesis of TiO2 Nanoparticles using Cucurbita pepo seeds extract

Abisharani, J.M.; Devikala, S.; Kumar, Raghvendra; Arthanareeswari, M.; Kamaraj, P.

doi:10.1016/j.matpr.2019.04.151

Cited by 67 publications

(17 citation statements)

References 25 publications

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“…The IR spectrum of TiO 2 and TiO 2 -C were shown in Figure 3. The FT-IR spectrum of both spectra displays absorption bands between 700 and 800 cm −1 , which can be assigned to the metaloxygen stretching vibrations of Ti-O [38]. The broad peak in the range of 3400 nm and sharp peak in the range of 1620 nm corresponds to the stretching and bending bonds of the water molecule, respectively, which occur due to lack of inter-tissue water or the absorption of moisture on the surface of the synthesized materials.…”

Section: Photocatalyst Characterizationmentioning

confidence: 98%

Photocatalytic degradation of Perchloroethylene by a lab-scale continuous-flow annular photoreactor packed with glass beads carbon-doped TiO2 nanoparticles

Kazemi¹,

Rabbani

Kashafroodi

et al. 2021

AMECJournal

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In this study, the amount of photocatalytic degradation of perchloroethylene in the gas phase was investigated by a fixed bed continuous-flow tubular photoreactor. The photoreactor consists of a cylindrical glass tube, was filled with glass beads coated with nanoparticles of TiO2, TiO2 doped carbon (TiO2-C). These nanoparticles were synthesized by the sol-gel method and deposited on glass beads using the sol-gel dip technique. X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transforms infrared spectroscopy (FT-IR), and diffuse reflectance spectroscopy (DRS) were used for the characterization of synthesized materials. The effect of different parameters such as relative humidity, residence time, PCE concentration on the photocatalytic degradation process was investigated by ultraviolet irradiation to achieve the highest possible degradation efficiency. The PCE degradation and byproduct species were monitored and identified with a gas chromatography-mass spectrometer device (GC-MS). Under the optimum experimental conditions, the photocatalytic activities of TiO2, TiO2-C were investigated and compared together. The results showed that photocatalytic activity of TiO2 for degradation of PCE was extremely increased when doped with carbon. For TiO2-C catalyst, under UV irradiation (3000 ppm initial PCE concentration, 30% humidity and 1 min residence time) approximately 96% of the initial PCE was degraded.

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Section: Photocatalyst Characterizationmentioning

confidence: 98%

Photocatalytic degradation of Perchloroethylene by a lab-scale continuous-flow annular photoreactor packed with glass beads carbon-doped TiO2 nanoparticles

Kazemi¹,

Rabbani

Kashafroodi

et al. 2021

AMECJournal

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“…The Anatase and rutile phase of TiO 2 exhibits a tetragonal crystal structure, but the brookite phase is an orthorhombic structure [11]. The transition metal oxide, mainly TiO 2 , is widely used in cosmetics, photocatalysts, medicines, sensors, and solar cell applications because of its peculiar properties like interconnected pores and large surface area [12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of TiO2 nanoparticles by chemical and green synthesis methods and their multifaceted properties

2021

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In this present work, Titanium dioxide nanoparticles (TiO2 NPs) successfully synthesized using the chemical as well as the green synthesis routine. The ethanol provoked the chemical reduction of ions. In the green synthesis, jasmine flower extract was used as a reducing and stabilizing agent because it contains alkaloids, coumarins, flavonoids. The Rutile phase of TiO2 NPs with an average crystalline size of 31–42 nm was revealed from the XRD pattern. From the UV–Visible spectroscopy, the optically active region of TiO2 NPs at 385 nm represents the visible region spectrum. The Ti–O–Ti and Ti–O vibration bond formation confirms the formation of TiO2 NPs. The SEM image of TiO2 NPs reveals that the spherical shaped NPs with randomly arranged manner. The obtained results have revealed that the property of TiO2 nanoparticles was similar in both processes. The Photodegradation of methylene blue dye was investigated and resulted in the maximum degradation efficiency of 92% is achieved at 120 min of irradiation. The Photodegradation study shows the biosynthesized TiO2 NPs exhibits a higher degradation efficiency compared to chemically synthesized TiO2 NPs. The antibacterial activity of prepared TiO2 NP’s was studied using grams-positive and gram-negative strains. The biological activities of green synthesized TiO2 NPs are enhanced compared to the chemically synthesized TiO2 NPs. Hence the degradation efficiency and zone inhibition layer indicate that the prepared TiO2 NPs are the potential candidate for environmental and biomedical applications. Graphic abstract

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“…The environmentally friendly and sustainable synthesis methods are using in "green" chemistry in order to prevent the formation of toxic by-products [22][23][24]. Different biological materials, such as plant extracts, algae, fungi, bacteria, etc., are used in the "green" synthesis of metal and metal oxide NPs [25][26][27][28][29][30][31][32][33][34][35][36]. The use of plant extracts is fairly easy for obtaining NPs on a large scale, compared to the synthesis with fungi and bacteria [20,37,38].…”

Section: Biological Components For "Green" Synthesismentioning

confidence: 99%

Green Synthesis of Metal and Metal Oxide Nanoparticles: Principles of Green Chemistry and Raw Materials

et al. 2021

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Increased request for metal and metal oxide nanoparticles nanoparticles has led to their large-scale production using high-energy methods with various toxic solvents. This cause environmental contamination, thus eco-friendly “green” synthesis methods has become necessary. An alternative way to synthesize metal nanoparticles includes using bioresources, such as plants and plant products, bacteria, fungi, yeast, algae, etc. “Green” synthesis has low toxicity, is safe for human health and environment compared to other methods, meaning it is the best approach for obtaining metal and metal oxide nanoparticles. This review reveals 12 principles of “green” chemistry and examples of biological components suitable for “green” synthesis, as well as modern scientific research of eco-friendly synthesis methods of magnetic and metal nanoparticles. Particularly, using extracts of green tea, fruits, roots, leaves, etc., to obtain Fe3O4 NPs. The various precursors as egg white (albumen), leaf and fruit extracts, etc., can be used for the „green” synthesis of spinel magnetic NPs. “Green” nanoparticles are being widely used as antimicrobials, photocatalysts and adsorbents. “Green” magnetic nanoparticles demonstrate low toxicity and high biocompatibility, which allows for their biomedical application, especially for targeted drug delivery, contrast imaging and magnetic hyperthermia applications. The synthesis of silver, gold, platinum and palladium nanoparticles using extracts from fungi, red algae, fruits, etc., has been described.

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Green synthesis of TiO2 Nanoparticles using Cucurbita pepo seeds extract

Cited by 67 publications

References 25 publications

Photocatalytic degradation of Perchloroethylene by a lab-scale continuous-flow annular photoreactor packed with glass beads carbon-doped TiO2 nanoparticles

Photocatalytic degradation of Perchloroethylene by a lab-scale continuous-flow annular photoreactor packed with glass beads carbon-doped TiO2 nanoparticles

Synthesis of TiO2 nanoparticles by chemical and green synthesis methods and their multifaceted properties

Green Synthesis of Metal and Metal Oxide Nanoparticles: Principles of Green Chemistry and Raw Materials

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