Assessment of the Effect of Al2O3 and TiO2 Nanoparticles on Orange Peel Biomass and its Application for Cd (II) and Ni (II) Uptake

2019 ◽  
Vol 62 (1) ◽  
pp. 139-147 ◽  
Author(s):  
Adriana Herrera-Barros ◽  
Candelaria Tejada-Tovar ◽  
Angel Villabona-Ortíz ◽  
Ángel González-Delgado ◽  
Rodolfo José Mejía-Meza
Keyword(s):  
Particle Size ◽  
Wastewater Treatment ◽  
Adsorption Process ◽  
Average Particle Size ◽  
Orange Peel ◽  
Average Particle ◽  
Solution Ph ◽  
Ft Ir ◽  
Amine Groups ◽  
Biomass Spectra

Abstract. In recent years, nanotechnology has been used to synthesize novel materials with several applications, such as wastewater treatment, medicine, and packaging. In this study, titanium dioxide (TiO2) and alumina (Al2O3) nanoparticles were synthesized and used to modify orange peel (OP) biomass. The resulting materials (OP-TiO2 and OP-Al2O3) were applied as biosorbents for removing nickel and cadmium from an aqueous solution. FT-IR, SEM-EDS, and XRD analyses were carried out to determine functional groups of biomass, morphology and elemental composition of the biosorbent, and average particle size, respectively. The presence of hydroxyl, carboxyl, and amine groups in the biomass spectra contributed to the adsorption process. Successful synthesis of the biosorbents due to the presence of aluminum and titanium elements was confirmed by energy dispersive x-ray spectroscopy (EDS). The average particle size was calculated as 19.13 ±4.1 nm and 58.56 ±12.64 nm for TiO2 and Al2O3, respectively. The solution pH significantly affected the adsorption process, and pH of 4 to 6 was selected as a suitable range. The highest removal yields of 87.85% and 95.6% were achieved using OP-Al2O3 for nickel and cadmium uptake, respectively. These results revealed an improvement in adsorption properties after loading the orange peel biomass with nanoparticles. Keywords: Biosorbent, Heavy metals, Nanomaterials, Wastewater treatment.

Synthesis of Dispersed Y2O3 Nanopowder from Yttrium Stearate

2013 ◽  
Vol 544 ◽  
pp. 3-7 ◽  
Author(s):  
Jin Sheng Li ◽  
Xu Dong Sun ◽  
Shao Hong Liu ◽  
Di Huo ◽  
Xiao Dong Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Raw Materials ◽  
Average Particle Size ◽  
Ceramic Materials ◽  
Average Particle ◽  
Water Medium ◽  
Nitrate Hexahydrate ◽  
Yttrium Nitrate ◽  
Ft Ir ◽  
Yttrium Nitrate Hexahydrate

Fine yttrium stearate powder was produced at a relatively low temperature using yttrium nitrate hexahydrate, ammonia and stearic acid as the raw materials. Dispersed Y2O3 nanopowder was synthesized by calcining the yttrium stearate. The formation mechanism of the precursor and the Y2O3 nanopowder was studied by means of XRD, TG-DTA, FT-IR, BET, FE-SEM and HR-TEM. Pure and dispersed Y2O3 nanopowder with an average particle size of 30 nm was produced by calcining the precursor at 600 °C. The particle size increases to about 60 nm with the increase of the calcination temperature to 1000 °C. In the preparation of Y2O3 from yttrium stearate, no water medium is involved, thus capillarity force and bridging of adjacent particles by hydrogen bonds can be avoided, resulting in good dispersion of the particles. The dispersed Y2O3 nanopowder prepared in this work has potential application in phosphors and transparent ceramic materials.

Preparation of Dispersed Y2O3-MgO Nanopowder from Stearate

2018 ◽  
Vol 279 ◽  
pp. 208-213
Author(s):  
Hua Dong Wang ◽  
Zhi Qiang Sun ◽  
Xiao Bo Yang ◽  
Tao Wu ◽  
Heng Dong ◽  
...  
Keyword(s):  
Particle Size ◽  
Hydrogen Bonds ◽  
Calcination Temperature ◽  
Formation Mechanism ◽  
Potential Application ◽  
Average Particle Size ◽  
Ceramic Materials ◽  
Average Particle ◽  
Water Medium ◽  
Ft Ir

Dispersed Y2O3-MgO nanopowder was synthesized by calcining the stearate. XRD, TG-DTA, FT-IR, BET and FE-SEM were employed to analyze The formation mechanism of the precursor and the Y2O3-MgO nanopowder. Pure and dispersed Y2O3-MgO nanopowder with an average particle size of 40 nm was produced by calcining the precursor at 600 °C. The particle size increases to about 70 nm with the increase of the calcination temperature to 700 °C. In the preparation of Y2O3-MgO from stearate, no water medium is involved, thus capillarity force and bridging of adjacent particles by hydrogen bonds can be avoided, resulting in good dispersion of the particles. The dispersed Y2O3-MgO nanopowder prepared in this work has potential application in infrared transparent ceramic materials.

scholarly journals Effect of Grinding Methods on Structural, Physicochemical, and Functional Properties of Insoluble Dietary Fiber from Orange Peel

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Yanlong Liu ◽  
Lufeng Wang ◽  
Fengxia Liu ◽  
Siyi Pan
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
Dietary Fiber ◽  
Functional Properties ◽  
Average Particle Size ◽  
Orange Peel ◽  
Major Change ◽  
Average Particle ◽  
Insoluble Dietary Fiber ◽  
Physicochemical And Functional Properties

This study evaluated the effect of grinding methods (regular laboratory milling, ultra centrifugal rotor milling, and ball milling) on structural, physicochemical, and functional properties of insoluble dietary fiber (IDF) fraction from orange peel. The results demonstrated that both ultra centrifugal milling and ball milling could effectively decrease average particle size of IDF fraction (81.40 μm and 19.63 μm, resp.). The matrix structure of IDF fraction was destroyed but FTIR structure had no major change after grinding. As particle size decreased, the bulk density and lightness of IDF fraction increased and a redistribution of fiber components from insoluble to soluble fractions was observed. Furthermore, ball milled IDF fraction exhibited significantly higher capacity to retard glucose diffusion and inhibitα-amylase activity (35.09%). This work would give useful insight into effect of grinding methods on properties and functions of orange peel IDF in food industry.

Preparation and Characterization of Fluorinated Epoxy Resin Emulsion for Waterborne Coatings

2011 ◽  
Vol 347-353 ◽  
pp. 4065-4068
Author(s):  
Wen Lu Guo ◽  
Hong Chun Zhou ◽  
Han Qing Lu ◽  
Wei Hu
Keyword(s):  
Contact Angle ◽  
Particle Size ◽  
Epoxy Resin ◽  
Average Particle Size ◽  
Average Particle ◽  
Waterborne Coatings ◽  
Orthogonal Experiments ◽  
Ft Ir ◽  
Emulsion Particle ◽  
Different Content

Under the action of initiator(BPO), the α-methyl acrylic acid (α-MAA), butyl hexafluorobutyl methacrylate (HFMA) and other monomers are graft copolymerized into epoxy molecular. By adding N, N-dimethyl ethanolamine, fluorine-containing water-based epoxy resin emulsion can be prepared. By orthogonal experiments, the amount of acrylic monomer, BPO dosage, grafting temperature and other optimum conditions can be determined. Infrared spectroscopy (FT-IR) characterization confirms acrylic monomers successfully grafted to the epoxy resin molecules. The study focuses on the effect of different content of HFMA on modified emulsion particle size and contact angle of coating. The results shows that the introduction of HFMA monomer made the smallest average particle size of emulsion low to 165 nm, and the contact angle against water is increased by 20°. After determining the conventional and environmental performance of the emulsion, the results shows that this preparation of epoxy resin emulsion can fully meet the requirements of waterborne coatings.

Preparation of ZnO Nanosol Dispersed in Aqueous Medium and its Dispersion Characteristics

2013 ◽  
Vol 481 ◽  
pp. 66-71 ◽  
Author(s):  
Hyeon Ha Lim ◽  
Seung Ho Lee ◽  
Hyung Mi Lim ◽  
Dae Sung Kim
Keyword(s):  
Particle Size ◽  
Zeta Potential ◽  
Aqueous Medium ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Average Particle ◽  
Dispersion Parameters ◽  
Ft Ir ◽  
Zno Powder

Highly dispersed ZnO nanosol, having an average particle size of about 40nm based on Particle Size Analysis (PSA), was prepared under aqueous solution without the removal of large particles by centrifugation. The ZnO nanosol was investigated on the effect of various dispersion parameters, i.e. milling time, dispersant content, pH, etc. The nanosol was effectively dispersed at 20~30 wt% of dispersant amount compared to ZnO content under ball-milling for 10 hours at pH 10. The dispersion characteristic of the nanosol was investigated into particle size and zeta potential. We discussed on the dispersion behavior of (-) charged ZnO particle surrounded by dispersant together with the variation of (-) charged dispersant's amount in aqueous medium at pH 10. The ZnO powder and nanosol were characterized by SEM, TEM, TGA, FT-IR, PSA and Zeta-potential.

scholarly journals A Facile Synthesis of Fe3O4@SiO2@ZnO for Curcumin Delivery

2021 ◽  
Vol 12 (6) ◽  
pp. 7994-8002
Keyword(s):  
Particle Size ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Average Particle Size ◽  
Average Particle ◽  
Zno Nanoparticle ◽  
Facile Synthesis ◽  
Stöber Method ◽  
Ft Ir

This paper proposed an engineered silica-coated Fe3O4 with ZnO nanoparticle, prepared by a coprecipitation/Stöber method as a curcumin delivery system. To this end, the structural characterization of the nanocomposite was performed by Fourier transform infrared spectroscopy (FT-IR), ray diffraction (XRD), VSM, and TEM. The findings show that the synthesized nanocomposite has a semispherical structure with an average particle size of 50-70 nm and excellent magnetization properties (21.4 emu/g).

The Preparation and Characteristics of Chitosan-Acetaminophen Drug-Loading Micropheres

2012 ◽  
Vol 586 ◽  
pp. 161-165 ◽  
Author(s):  
Hao Ran Zhou ◽  
Jing Yu Zhang ◽  
Hao Jiang
Keyword(s):  
Particle Size ◽  
Sustained Release ◽  
Raw Materials ◽  
Orthogonal Experiment ◽  
Drug Loading ◽  
Average Particle Size ◽  
Average Particle ◽  
Preparation Process ◽  
Structure And Morphology ◽  
Ft Ir

CS-ACAP drug-loading microsperes are prepared with using CS and ACAP as the main raw materials by emulsification-crosslinking method. Orthogonal experiment was designed to optimize the preparation process of the CS-ACAP drug-loading microspheres. FT-IR and SEM were applied to characterize the structure and morphology of microspheres. The sustained release effect of CS-ACAP microsphere was measured by sustained release measurement. The results showed that the CS-ACAP drug-loading micropheres were successfully prepared by emulsification-crosslinking method. Obtained microspheres as a perforated sphere, the average particle size of the microspheres was 30μm and the microspheres had a uniformly particle size distribution; the drug-loaded microspheres had good sustained release effect.

scholarly journals Variation of Alkali Concentration and Temperature: Its Effect on the Morphology of ZnO Nanoparticles Synthesized via Solvothermal Technique

2021 ◽  
Vol 411 ◽  
pp. 3-15
Author(s):  
Boon Siong Wee ◽  
Eric Kwabena Droepenu ◽  
Suk Fun Chin ◽  
Kuan Ying Kok ◽  
Woei Ting
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Average Particle Size ◽  
Alkali Concentration ◽  
Average Particle ◽  
Zno Nanostructures ◽  
Tem Analysis ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Concentration Ratios

This study reports on synthesis of ZnO nanostructures using Zinc chloride (ZnCl2) as precursors and Potassium hydroxide (KOH) as alkaline source in a solvothermal process with varying molar concentrations (Zn2+/OH-) of 1:1, 1:3 and 1:5 for temperatures of 30 °C and 50 °C. The synthesized nanostructures were characterized by X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Transmission Electron Microscopy (TEM), Fourier Transform Infrared (FT-IR) Spectroscopy, and Ultraviolet Visible (UV-Vis) spectroscopy. ZnO nanostructures synthesized at lower ratios (1:1) exhibited wurtzite hexagonal shapes. However, as the concentration ratios increases in both cases, spherical structures were formed with the emergence of some rod-like structures dominating, and finally aggregated to form flower-like structures at 30 °C temperature. The average crystallite size for nanostructures from XRD (30-50 °C) were in the range 15-21 nm whereas the average particle size from TEM analysis (30-50 °C) were in the range 39-76 nm. Increase in temperature and molar concentration of the alkaline source generally decreased the crystallite and particle size of the as well as a decrease in the wavelength of ZnO nanostructures as a result of blue-shifting of the absorption peak. FT-IR spectra of ZnO NSs prepared from concentration ratios of Zn2+: OH- (1:1, 1:3 and 1:5) at 30 °C and 50 °C showed characteristic peak bands at 461-467 cm-1 and 460-462 cm-1 respectively.

scholarly journals Photoassisted Synthesis of Silver Nanoparticles Using Riceberry Rice Extract and Their Antibacterial Application

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Pimsumon Jiamboonsri ◽  
Sompit Wanwong
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Irradiation Time ◽  
Chemical Reduction ◽  
Average Particle Size ◽  
Volume Ratio ◽  
Cost Effective ◽  
Diffusion Method ◽  
Average Particle ◽  
Ft Ir

The green synthesis of silver nanoparticles (AgNPs) has been attractive in biomedical applications due to its nontoxic and eco-friendly approach. This study presents the facile, rapid, and cost-effective synthesis of AgNPs by photoassisted chemical reduction using Riceberry (RB) rice extract as a reducing agent. The effects of reaction parameters including photoirradiation, irradiation time, the volume ratio of silver nitrate (AgNO3) to RB extract, and pH condition on the AgNP formation were also investigated. The characterization of AgNPs was determined by UV–visible spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared (FT-IR) spectroscopy. For antibacterial application, the synthesized AgNPs were studied by disc diffusion method against Escherichia coli and Staphylococcus aureus. The results indicated that light irradiation was an important factor to accelerate the formation of AgNPs. The synthesis parameters including volume of RB extract and pH condition significantly affected the particle size and crystallinity of AgNPs. The volume ratio of AgNO3 to RB extract 1 : 12.5 at pH 2.5 under photoirradiation was the successful condition to form nanometer-sized crystalline particles (average particle size of 59.48 ± 0.37   nm ) within 30 min with a rate constant of 0.210 min–1. The FT-IR measurement also suggested that the phytochemical constituents in RB extract were served as reducing and stabilizing agents for the synthesis of AgNPs. Additionally, the obtained AgNPs from various conditions demonstrated the antibacterial activity against both strains. Therefore, this study proposes an effective integration technique to synthesize AgNPs within a short time for antibacterial application.

Research on the Preparation of Antimony Nanoparticles by Mechanical Ball Milling

2014 ◽  
Vol 609-610 ◽  
pp. 244-249 ◽  
Author(s):  
Jian Lin Xu ◽  
Liang Zhang ◽  
Qiang Guo ◽  
Sheng Gang Zhou ◽  
Chong Feng
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
Average Particle Size ◽  
Raw Material ◽  
Average Particle ◽  
Wet Process ◽  
Dry Grinding ◽  
Structure Morphology ◽  
Ft Ir ◽  
Mechanical Ball Milling

Taking antimony powder with 75μm of average particle size as raw material, the antimony nanoparticles were synthesized by mechanical ball milling. Crystalline structure, morphology and particle size of the antimony nanoparticles were characterized by XRD, TEM and FT-IR. The effect of milling mediums and ball milling speed on results antimony nanoparticles were studied using dry grinding and wet grinding methods. The results show that the antimony nanoparticles can be prepared successfully by wet process of ball milling. When the ball milling speed is 150 r/min and the milling mediums is a composites of distilled water and OP-10, the best antimony nanoparticles were prepared, which is high dispersibility and the average particle size is 10 nm.

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