Study on Nano-TiO2 Film Prepared by Hydrothermal Method in Toluene-Hydrochloric Acid-Water System

2012 ◽  
Vol 610-613 ◽  
pp. 3247-3251 ◽  
Author(s):  
Xian Guang Zeng ◽  
Jia Zhuang ◽  
Min Gong ◽  
Xing Wen Zheng ◽  
Ming Tian Li
Keyword(s):  
Methylene Blue ◽  
Hydrochloric Acid ◽  
Hydrothermal Method ◽  
Tio2 Film ◽  
Water System ◽  
Photocatalytic Property ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Tetrabutyl Titanate ◽  
Average Size

A new hydrothermal method was introduced to prepare TiO2 films. The films were prepared by using tetrabutyl titanate as precursor, toluene as solvent and hydrochloric acid as the inhibitor via a facile hydrothermal method. XRD, SEM, AFM, and TG-DSC were used to characterize phase structure and morphology of TiO2 thin films. XRD analysis showed that crystal phase of as- prepared films were anatase entirely,and its average size was 9 nm. AFM and SEM analysis indicated that films had nanocrystallines,and it was homogenous,dense and crack- free. Photocatalytic properties of TiO2 film were estimated by degradation of methylene blue . The result shows that the degradation rate of 40mL methylene blue solution with initial concentration 10 mg/L reaches to 52.8 % after irradiated for 120 min under 35W ultraviolet lamp ,and as-prepared TiO2 film has better photocatalytic property.

scholarly journals ZnO-SiO2 and Zn2SiO4 Synthesis Utilizing Oil Palm Leaves for Degradation of Methylene Blue Dye in Aqueous Solution

2020 ◽  
Vol 3 (2) ◽  
pp. 94
Author(s):  
Salprima Yudha S. ◽  
Prissana Robkhob ◽  
Tanawat Imboon ◽  
Aswin Falahudin ◽  
Asdim ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Oil Palm ◽  
Elaeis Guineensis ◽  
Xrd Analysis ◽  
Zinc Nitrate ◽  
Sem Analysis ◽  
Blue Dye ◽  
Amorphous Sio2 ◽  
New Approach ◽  
Sunlight Irradiation

A new approach was developed for the green synthesis of ZnO-SiO2 composite and Zn2SiO4 using zinc nitrate and sustainable silica precursor, oil palm (Elaeis guineensis) leaves (OPL). The products were synthesized at two different reaction temperatures through calcination in an open-air furnace at 500 and 1000 °C, respectively, and further identified with an X-ray diffractometry (XRD) analysis. The composite indicated by the presence of peaks at 2θ = 31.7°, 34.4°, 36.3°, 47.6°, 56.6°, and 62.9°, corresponds to ZnO and also revealed amorphous SiO2 at 2θ = 21°. Conversely, Zn2SiO4 was acknowledged at 2θ 25.6°, 31.50°, 34.0°, 39.5°, 48.9°, 56.5° and 65.6°, with crystalline silica at 2θ = 21.9°. The results showed the morphology of both products exhibited similar agglomeration based on scanning electron microscopy (SEM) analysis. Both products (ZnO-SiO2 composite and Zn2SiO4) possessed the capacity to degrade methylene blue (MB) under sunlight irradiation with efficiency of 85.9% and 69.3%, respectively.

Phyllantus Emblica Mediated Silica Nanomaterials: Biosynthesis, Structural and Stability Analysis

2021 ◽  
Author(s):  
M Sankareswaran ◽  
M Vanitha ◽  
P. Rajiv ◽  
A. Anbukumaran
Keyword(s):  
Silica Nanoparticles ◽  
Research Work ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Weight Percentage ◽  
Ir Studies ◽  
Silica Nanomaterials ◽  
Crystalline Nature ◽  
Size Of Particles ◽  
Average Size

Abstract The current investigation reports on a green route, simple and eco-friendly method for synthesis of silica nanoparticles from Phyllantus emblica. Appropriate characterization techniques were employed to assess the crystalline nature, microstructure, size, purity, elemental composition and stability of as-biosynthesized silica nanoparticles. The XRD analysis showed a wide-ranging peak at 22∘ of 2θ value and proved that the nanoparticles were crystalline nature with 32 nm average size of particles. FT-IR studies confirmed the occurrence of metal oxide group and presence of phyto-molecules namely hydroxyl, amide, and carboxyl functional groups, which were responsible for formation and stabilization of silica nanomaterials. TGA and Zeta potential analysis determined that silica nanoparticles are highly thermostable. EDX analysis revealed the purity of nanomaterials and spectra confirmed that formation of silica nanomaterials (72.97 weight percentage of SiO2 content) with low impurities. SEM analysis shows that the particles are spherical in shape with low agglomeration. This research work concluded that the P. emblica was an excellent and reliable green resource for production of highly stable and potential silica nanoparticles.

Synthesis of TiO2-Modified Hydroxyapatite with Various Morphology by Urea-Assisted Hydrothermal Method

2016 ◽  
Vol 868 ◽  
pp. 28-32 ◽  
Author(s):  
Tomoyo Goto ◽  
Tohru Sekino
Keyword(s):  
Methylene Blue ◽  
Hydrothermal Method ◽  
Hydrothermal Treatment ◽  
Uv Irradiation ◽  
Photocatalytic Property ◽  
Photocatalytic Decomposition ◽  
Urea Solution ◽  
Methylene Blue Solution ◽  
Blue Solution ◽  
Urea Decomposition

In this study, we synthesized the TiO2-modified hydroxyapatite (HAp) with various morphologies by hydrothermal treatment using urea decomposition, at 160 oC for 6 h. After hydrothermal treatment, carbonate-substituted HAp and TiO2 (anatase) phases were formed in products using 1.0-0.1 M urea solution. The morphology of synthesized HAp changed from small plate-shaped to long needle-shaped crystals with decreasing the urea concentration. The photocatalytic property for samples was investigated by decoloration test using 25 ppm methylene blue solution. In comparison with HAp samples without TiO2, the TiO2-modified HAp clearly showed the photocatalytic decomposition of methylene blue by UV irradiation.

Preparation of Waterborne Polyurethane by Bio-Based Polyol and Study of Nanocomposites with Nanocellulose Particles

2020 ◽  
Vol 20 (8) ◽  
pp. 4873-4877
Author(s):  
Soonmo Choi ◽  
Eunjoo Shin
Keyword(s):  
Waterborne Polyurethane ◽  
Xrd Analysis ◽  
Decomposition Temperature ◽  
Sem Analysis ◽  
Regenerated Cellulose ◽  
Initial Modulus ◽  
A Chain ◽  
Average Size ◽  
20 Nm ◽  
Low Crystallinity

In this study, we environment-friendly developed bio-based waterborne polyurethane (BWPU) through the use of both harmless water to human instead of organic solvent and natural castor oil-based polyols. Also, high crystallinity cellulose nanocrystals (CNCs) and regenerated cellulose nanoparticles (RCNs) with low crystallinity as reinforcing agents were prepared through H2SO4 and NaOH/urea methods, respectively. In SEM analysis, we defined that the CNC rod-like particles have a length of 100~200 nm and a width of several tens nm and that the average size of RCNs with round shape was 7~20 nm. It was shown that the crystallinity of CNCs was higher than RCNs’ via FTIR and XRD analysis. In addition, it was found that as the contents of CNCs and RCNs increased, so did the properties of strength, initial modulus, and strain. It could be established that all results mentioned were constituted by the hydrogen bonding between the -OH group of nanocellulose and the -NCO group of BWPU constitutes as well as the role of nanocellulose as a chain extender. Furthermore, the maximum decomposition temperature increased with raising the content of nanocellulose. This tendency was more favorable for CNCs with higher crystallinity than RCNs with low crystallinity.

Synthesis of CuO Microspheres by the Simple Hydrothermal Method and their Optical Absorption Properties

2012 ◽  
Vol 562-564 ◽  
pp. 490-493
Author(s):  
Xiao Ming Fu
Keyword(s):  
Optical Absorption ◽  
Hydrothermal Method ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
Absorption Properties ◽  
Visible Absorption ◽  
X Ray ◽  
Cuo Microspheres ◽  
Visible Absorption Spectroscopy

CuO microspheres with a diameter range of 1~3 μm are successfully synthesized with 1 m mol CuCl2 as copper source and 3 m mol Na2CO3 as auxiliary salt at 180 °C for 24 h via the easy hydrothermal method. The phase, the morphologies and optical absorption properties of the samples have been characterized and analyzed by XRD (X-ray diffraction), SEM (Scanning electron microscope) and ultraviolet-visible absorption spectroscopy (UV-VIS), respectively. XRD analysis shows that the phase of as obtained samples is CuO. SEM analysis confirms that the increase of the the auxiliary salt is in favor of the synthesis of CuO microrods. And UV-VIS measurements show that CuO microspheres have a good optical absorption property.

CuO Microspheres Synthesized via the Easy Hydrothermal Method

2012 ◽  
Vol 159 ◽  
pp. 84-87
Author(s):  
Xiao Ming Fu
Keyword(s):  
Electron Microscope ◽  
Reaction Time ◽  
Scanning Electron Microscope ◽  
Hydrothermal Method ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cuo Microspheres ◽  
Scanning Electron

CuO microspheres are successfully synthesized with CuCl2 as copper source and Na2CO3 as auxiliary salt at 240 °C for 24 h via the easy hydrothermal method. The phase and the morphologies of the samples have been characterized and analyzed by XRD (X-ray diffraction) and SEM (Scanning electron microscope), respectively. XRD analysis shows that the phase of as obtained samples is CuO. SEM analysis confirms that the increase of the reaction time, the reaction temperature and the auxiliary salt is propitious to synthesize CuO microspheres.

Preparation of Nano-Sized TiO2 Supported on Granular Activated Carbon and the Photocatalytic Degradation of Methylene Blue

2012 ◽  
Vol 508 ◽  
pp. 188-191
Author(s):  
Peng Zhang ◽  
Shu Ting Lai ◽  
Fang Liu ◽  
Zhuo Hong Yang ◽  
Wu Yi Zhou
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Surface Morphology ◽  
Photocatalytic Degradation ◽  
Hydrothermal Method ◽  
Anatase Phase ◽  
Granular Activated Carbon ◽  
Element Distribution ◽  
Average Size

nanosized TiO2 were prepared using TiOSO4 as the precursor by hydrolysis-precipitation and hydrothermal method. Through dipping granular activated carbon (GAC) into the TiO2 hydrosols, The nanosized TiO2/GACs composite was obtained. The surface morphology, microstructure and element distribution of the composite were characterized by TEM, SEM, XRD, EDS respectively. The results show that the synthesized nanosized TiO2 is anatase phase with average size of 150-200 nm and can be dispersed uniformly on the surface of GACs. Photocatalytic experimental shows that when the load amount is 1.5%, the nanosized TiO2/GACs composite have the best effect of removal methylene blue,the rate up to 97.0 % in 180 min.

Synthesis of CuO Flower-Nanostructure via the Hydrothermal Method

2013 ◽  
Vol 873 ◽  
pp. 131-134
Author(s):  
Xiao Ming Fu ◽  
Jie Ren
Keyword(s):  
Electron Microscope ◽  
Reaction Time ◽  
Scanning Electron Microscope ◽  
Hydrothermal Method ◽  
Reaction Temperature ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

CuO flower-nanostructures are successfully synthesized with CuCl2 as copper source and Na2CO3 as auxiliary salt at 180 °C for 24 h via the simple hydrothermal method. The phase and the morphologies of the samples have been characterized and analyzed by XRD (X-ray diffraction) and SEM (Scanning electron microscope), respectively. XRD analysis shows that the phase of as obtained samples is CuO. SEM analysis confirms that the increase of the reaction temperature is propitious to synthesize CuO flower-nanostructures while the increase of the reaction time is not in favor of their synthesis. The influence of the increase of the auxiliary salt on the morphology of CuO flower-nanostructures is not remarkable. The mechanism of the formation of CuO flower-nanostructure is discussed.

Characterization of mechanochemically synthesized lead selenide

2009 ◽  
Vol 63 (5) ◽  
Author(s):  
Marcela Achimovičová ◽  
Nina Daneu ◽  
Aleksander Rečnik ◽  
Juraj Ďurišin ◽  
Baláž Peter ◽  
...  
Keyword(s):  
Mechanochemical Synthesis ◽  
Lead Selenide ◽  
Blue Shift ◽  
Xrd Analysis ◽  
High Energy ◽  
Sem Analysis ◽  
Area Measurement ◽  
Distribution Analysis ◽  
Average Size

AbstractMechanochemical synthesis of lead selenide PbSe nanocrystals was performed by high-energy milling of lead and selenium powders in a planetary ball mill. The structure properties of synthesized lead selenide were characterized by XRD analysis that confirmed crystalline nature of PbSe nanocrystals. Calculated average size of PbSe crystallites was 37 nm. The methods of particle size distribution analysis, specific surface area measurement, SEM and TEM were used for the characterization of surface and morphology of PbSe nanocrystals. SEM analysis revealed agglomerates of PbSe particles. However, HRTEM analysis confirmed perfect stoichiometric PbSe cubes with NaCl structure as well. UV-VIS-NIR spectrophotometry was used to confirm the blue shift of the small particles occurring in the powder product obtained by the mechanochemical synthesis.

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