scholarly journals Green Synthesis of Nano-Sized Sulfur and Its Effect on Plant Growth

2015 ◽  
Vol 8 (1) ◽  
pp. 188 ◽  
Author(s):  
Nidá M. Salem ◽  
Luma S. Albanna ◽  
Akl M. Awwad ◽  
Qusay M. Ibrahim ◽  
Amany O. Abdeen
Keyword(s):  
Aqueous Extract ◽  
Spherical Shape ◽  
Melia Azedarach ◽  
X Ray Diffraction ◽  
Major Objective ◽  
Green Route ◽  
Ft Ir ◽  
Environmental Pathogens ◽  
Green Procedure ◽  
Sulfur Nanoparticles

<p>The major objective of this research paper is to synthesis sulfur nanoparticles (SNPs) by green route, which can improve plant’s growth and reduce the environmental pathogens. Sulfur nanoparticles (SNPs) were synthesized by a simple green procedure using <em>Melia azedarach</em> leaves aqueous extract and citric acid. The leaves of <em>Melia azedarach</em> aqueous extract act as a capping and stabilizing agent in the formation of sulfur nanoparticles. The synthesized sulfur nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR). The average particles diameter size was found to be 20 ± 4 nm. Analysis showed that the nanoparticles are crystalline in nature, with spherical shape. A preliminary field study was conducted to evaluate growth and development of <em>Cucurbita pepo</em> in response to sulfur nanoparticles.</p>

scholarly journals GREEN SYNTHESIS OF SILVER NANOPARTICLES USING GRAVIOLA LEAF AQUEOUS EXTRACT AT ROOM TEMPERATURE

2015 ◽  
Vol 2 (2) ◽  
pp. 6-10
Author(s):  
Ranjithkumar R ◽  
Chandar Shekar B ◽  
Senthil Kumaran C.K ◽  
Sharmila C ◽  
Simi V
Keyword(s):  
Silver Nanoparticles ◽  
Infrared Spectroscopy ◽  
Aqueous Extract ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
Electron Microscopic ◽  
Green Route ◽  
Leaf Aqueous Extract ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Ft Ir

Improvement of green route for the synthesis of silver nanoparticles with plant extracts plays a very important role in nanotechnology without any harmful chemicals. The present investigation demonstrates the synthesis of silver nanoparticles by treating silver nitrate with Graviola leaf extract at room temperature.The effect of the extract on the formation of silver nanoparticles was characterized by UV-Vis spectrum, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Scanning electron microscopic (SEM) analysis. The UV-Vis spectra results show a strong resonance centered on the surface of silvernanoparticles (AgNPs) at 400-450 nm. The Fourier transformation infrared spectroscopy spectral study demonstrates Graviola leaf aqueous extract acted as the reducing and stabilizing agent during the synthesis of silver nanoparticles. XRD and SEM studies revealed that the synthesized silver nanoparticles shows spherical in shape with average particles size around 30-70 nm.

Preparation and Characterization of Nanocrystalline La2Ti2O7 by Microwave Assisted Process

2016 ◽  
Vol 852 ◽  
pp. 525-529 ◽  
Author(s):  
Ying Zhou ◽  
Zhi Yong Mei ◽  
Hai Shao Ye ◽  
Wen Wen Su ◽  
Xi Zhao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Light ◽  
Raw Materials ◽  
Spherical Shape ◽  
High Photocatalytic Activity ◽  
X Ray Diffraction ◽  
Microwave Assisted ◽  
Average Grain Size ◽  
Ft Ir

Using La (NO3)3·6H2O, TiCl4 , and citric acid as the main raw materials, nanocrystalline La2Ti2O7 samples were prepared by microwave assisted method. The structure and morphology of samples were characterized by thermogravimetric and differential thermal analysis (TG-DTA), powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier Transform Infrared (FT-IR) spectroscopy. The photocatalytic activity of La2Ti2O7 was studied for methyl orange (MO) used as simulated sewage. It was found that the single phase La2Ti2O7 could be obtained through the calcination of microwave processed La2Ti2O7 precursors at 600 °C. The resulted product had an approximate spherical shape and average grain size of 50 nm in diameter. Under UV light, the photocatalytic experiment indicated that the prepared La2Ti2O7 nanocrystalline had high photocatalytic activity for degradation of methyl orange.

Synthesis of Anatase/Brookite Mixtured TiO2 Nanoparticles by a Chimie Douce Technique

2013 ◽  
Vol 734-737 ◽  
pp. 2528-2531
Author(s):  
Yu Mei Gong ◽  
Qing Liang ◽  
Jing Guo ◽  
Hong Zhang ◽  
Fu Cheng Guan
Keyword(s):  
Electron Microscope ◽  
Anatase Phase ◽  
Spherical Shape ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
Average Pore ◽  
Specific Pore Volume ◽  
Transmission Electron ◽  
Bet Method ◽  
Ft Ir

Anatase/brookite mixtured TiO2nanoparticles have been synthesized by using a two-step process through a chimie douce technique. The as-prepared powders were characterized by Fourier transform infrared (FT-IR) spectra, X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), and a nitrogen adsorption apparatus in multipoint Brunauer-Emmett-Teller (BET) method. The results indicated that the TiO2nanoparticles were composed of biphasial anatase/brookite mixtures, 38% anatase phase formed in quasi-spherical shape and 62% brookite phase formed in nanorod shape. The specific surface area, the average pore diameter, and the specific pore volume were 100.06 m2/g, 14.0 nm, and 0.561 cm3/g, respectively.

scholarly journals Enhancing Removal of Cr(VI), Pb2+, and Cu2+ from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7315
Author(s):  
Qinghua Xu ◽  
Xiaodi Huang ◽  
Lukuan Guo ◽  
Yu Wang ◽  
Liqiang Jin
Keyword(s):  
Aqueous Solutions ◽  
Cellulose Nanocrystal ◽  
X Ray Diffraction ◽  
Potential Measurement ◽  
Force Microscopy ◽  
Atomic Force ◽  
Adsorption Capacities ◽  
Green Route ◽  
Pseudo Second Order ◽  
Ft Ir

In this work, the amino-functionalized cellulose nanocrystal (ACNC) was prepared using a green route and applied as a biosorbent for adsorption of Cr(VI), Pb2+, and Cu2+ from aqueous solutions. CNC was firstly oxidized by sodium periodate to yield the dialdehyde nanocellulose (DACNC). Then, DACNC reacted with diethylenetriamine (DETA) to obtain amino-functionalized nanocellulose (ACNC) through a Schiff base reaction. The properties of DACNC and ACNC were characterized by using elemental analysis, Fourier transform infrared spectroscopy (FT-IR), Kaiser test, atomic force microscopy (AFM), X-ray diffraction (XRD), and zeta potential measurement. The presence of free amino groups was evidenced by the FT-IR results and Kaiser test. ACNCs exhibited an amphoteric nature with isoelectric points between pH 8 and 9. After the chemical modification, the cellulose I polymorph of nanocellulose remained, while the crystallinity decreased. The adsorption behavior of ACNC was investigated for the removal of Cr(VI), Pb2+, and Cu2+ in aqueous solutions. The maximum adsorption capacities were obtained at pH 2 for Cr(VI) and pH 6 for Cu2+ and Pb2+, respectively. The adsorption all followed pseudo second-order kinetics and Sips adsorption isotherms. The estimated adsorption capacities for Cr(VI), Pb2+, and Cu2+ were 70.503, 54.115, and 49.600 mg/g, respectively.

scholarly journals Optical, Structural, and Antimicrobial Study of Gold nanoparticles Synthesized Using an Aqueous Extract of Mimusops elengi Raw Fruits

2020 ◽  
Vol 10 (6) ◽  
pp. 7085-7096
Keyword(s):  
Gold Nanoparticles ◽  
Aqueous Extract ◽  
X Ray Diffraction ◽  
X Ray ◽  
Green Route ◽  
Infra Red ◽  
Hazardous Condition ◽  
Uv Visible ◽  
Mimusops Elengi ◽  
Positive Results

Gold nanoparticles (AuNPs) has been synthesized via a green route using an aqueous extract of Mimusops elengi raw fruits. The phytochemicals of the fruit help in stabilizing and capping of the nanoparticles. The formation and stability of the synthesized samples has been explained based on results that we obtain from UV-Visible spectroscopy, Fourier Transform Infra-Red (FTIR) spectroscopy, Dynamic Light Scattering (DLS), X-ray diffraction (XRD), scanning electron microscopy (SEM). Further, the positive results of the antimicrobial test add one more novelty to this work. The axiom of this work is the synthesis of stable AuNPs without using any external stabilizing or reducing agents. The formation of AuNPs with the help of photochemical present in Mimusops elengi is yet another important aspect of this work, which provides an eco-friendly method for the synthesis of AuNPs, which can be used extensively because of its non-hazardous condition.

scholarly journals Synthesis and characterization of Fe3O4@SiO2 sub-nano core/shell with SiO2 derived from rice husk ash

2020 ◽  
pp. 52-56
Author(s):  
Luong Huynh Vu Thanh, Tran Nguyen Phuong Lan Luong
Keyword(s):  
Spherical Shape ◽  
Xrd Analysis ◽  
Research Process ◽  
Infrared Spectrometry ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Tem Analysis ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Ft Ir

This study aims to synthesize and characterize Fe3O4@SiO2 sub-nanoparticles (SNPs) with high saturation magnetization (SM). The research process was conducted in simple and environmentally friendly conditions. The results of ultraviolet-visible (UV-Vis) spectroscopy and X-ray diffraction (XRD) analysis presented that the Fe3O4@SiO2 SNPs were well formed and the phase change of Fe3O4 NPs did not happen in Fe3O4@SiO2 SNPs. Transmission electron microscope (TEM) analysis showed that the Fe3O4@SiO2 SNPs are in a fairly spherical shape with a core/shell structure and a diameter in a range of 100 nm to 500 nm. Fourier transform infrared spectrometry (FT-IR) spectra of Fe3O4@SiO2 SNPs presented some absorption peaks indicating the existence of Si-O-Si, O-Si-O, Fe-O and Fe-O-Si. The SM of Fe3O4 particles and Fe3O4@SiO2 SNPs determined via vibrating sample magnetometer (VSM) were 50.9 emu.g−1 and 19.5 emu.g−1, respectively. All the above results provide clear evidence that the Fe3O4 particles were coated by SiO2 to form sub-nano core/shell with great SM.

A NOVEL APPROACH TOWARDS GREEN SYNTHESIS OF ZINC NANO PARTICLES FROM GUAZUMA ULMIFOLIA (LAM) FOR THEIR ANTI OXIDANT ACTIVITY STUDY

INDIAN DRUGS ◽  
2019 ◽  
Vol 56 (02) ◽  
pp. 16-20
Author(s):  
U. R Nannapaneni ◽  
◽  
S. R. Rayapati
Keyword(s):  
Spherical Shape ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
Zinc Nanoparticles ◽  
Ir Studies ◽  
Novel Approach ◽  
Absorption Studies ◽  
Anti Oxidant ◽  
Ft Ir ◽  
Guazuma Ulmifolia

Here we report a novel biological approach for the formation of zinc nanoparticles using Guazuma ulmifolia (Lam) leaves. Zinc acetate was reduced with aqueous solution of Guazuma ulmifolia leave extracts. X-Ray diffraction (XRD) pattern reveals the formation of zinc nanoparticles, which shows crystallinity. Scanning electron microscopy (SEM) suggested particles size in the range of 46-96nm and spherical shape. UV absorption studies of zinc nano particles showed absorbance at 698nm and FT-IR studies of zinc nanoparticles confirmed the presence of bio active phyto-constituents in the formed nano particles. The DPPH free radical inhibition study confirmed that the synthesized zinc nano particles have potential radical inhibiting activity.

Sulfur Nanoparticles Improves Root and Shoot Growth of Tomato

2016 ◽  
Vol 8 (4) ◽  
pp. 179 ◽  
Author(s):  
Nidá M. Salem ◽  
Luma S. Albanna ◽  
Amany O. Abdeen ◽  
Qusay I. Ibrahim ◽  
Akl M. Awwad
Keyword(s):  
Room Temperature ◽  
Shoot Growth ◽  
Research Work ◽  
Inhibitory Effect ◽  
X Ray Diffraction ◽  
X Ray ◽  
Green Route ◽  
Root And Shoot Growth ◽  
Temperature Scanning ◽  
Sulfur Nanoparticles

<p>The objective of this research work is to synthesize sulfur nanoparticles by green route and to investigate the beneficial effect on root and shoot growth of tomato. Sulfur nanoparticles (SNPs) synthesized using aqueous extract of <em>Ailanthus altissima</em> leaves at room temperature. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) inspections indicated that nanoparticles are spherical and polydispersed with diameters ranging between 5 and 80 nm. The potential of sulfur nanoparticles for enhancing tomato’s growth, increasing the concentration of sulfur nanoparticles from 100 ppm to 300 ppm cause an increase in root and shoot lengths, while higher concentration 400 ppm and 600 ppm induced an inhibitory effect. Results of this study reveal that SNPs have the potential to enhance root and shoot growth of tomato and the effect is concentration dependent.</p>

scholarly journals BIOGENIC SYNTHESIS OF ZINC OXIDE NANOPARTICLES USING LEAF EXTRACT OF JUSTICIA ADHATODA AND THEIR ANTIMICROBIAL ACTIVITY

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Arun Kumar Khajuria ◽  
Fariha Chowdhary ◽  
Narendra Singh Bisht
Keyword(s):  
Zno Nanoparticles ◽  
Leaf Extract ◽  
Analytical Techniques ◽  
Hexagonal Wurtzite Structure ◽  
Hydroxyl Groups ◽  
X Ray Diffraction ◽  
Green Route ◽  
Aqueous Leaf Extract ◽  
Ft Ir ◽  
Justicia Adhatoda

In the present study, an inexpensive green route has been demonstrated for the formation of ZnO nanoparticles by biogenic method using aqueous leaf extract of Justicia adhatoda which acts as a reducing and stabilizing agent. The synthesized ZnO nanoparticles were preliminarily characterized by UV-VIS followed by using different analytical techniques such as X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FT-IR). The XRD pattern confirmed that, the synthesized ZnO nanoparticles are of hexagonal wurtzite structure with average calculated grain size less than 9.40 nm. The FT-IR spectra indicated the presence of hydroxyl groups, carboxylic acids which may be responsible for biochemical reaction. The clear zone of inhibition against both gram- positive and gram-negative bacteria confirmed the antimicrobial potential of synthesized ZnO nanoparticles.

scholarly journals Polyurethane Composite Foams Synthesized Using Bio-Polyols and Cellulose Filler

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3474
Author(s):  
Katarzyna Uram ◽  
Milena Leszczyńska ◽  
Aleksander Prociak ◽  
Anna Czajka ◽  
Michał Gloc ◽  
...  
Keyword(s):  
Cross Sections ◽  
Raw Materials ◽  
Polyurethane Foams ◽  
Degree Of Crystallinity ◽  
X Ray Diffraction ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Closed Cell ◽  
Ft Ir ◽  
The Fourier Transform

Rigid polyurethane foams were obtained using two types of renewable raw materials: bio-polyols and a cellulose filler (ARBOCEL® P 4000 X, JRS Rettenmaier, Rosenberg, Germany). A polyurethane system containing 40 wt.% of rapeseed oil-based polyols was modified with the cellulose filler in amounts of 1, 2, and 3 php (per hundred polyols). The cellulose was incorporated into the polyol premix as filler dispersion in a petrochemical polyol made using calenders. The cellulose filler was examined in terms of the degree of crystallinity using the powder X-ray diffraction PXRD -and the presence of bonds by means of the fourier transform infrared spectroscopy FT-IR. It was found that the addition of the cellulose filler increased the number of cells in the foams in both cross-sections—parallel and perpendicular to the direction of the foam growth—while reducing the sizes of those cells. Additionally, the foams had closed cell contents of more than 90% and initial thermal conductivity coefficients of 24.8 mW/m∙K. The insulation materials were dimensionally stable, especially at temperatures close to 0 °C, which qualifies them for use as insulation at low temperatures.

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