Synthesis of Walnut Shaped V2O3 Particles and Its Photocatalytic Activity for Methylene Blue Degradation Under Visible Light Irradiation

2020 ◽  
Vol 20 (7) ◽  
pp. 4322-4326
Author(s):  
Kyung-Jun Hwang ◽  
Young Jin Kim ◽  
Xing Xing ◽  
Yongjoon Youn ◽  
Young-Jun Kwon ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Gas Adsorption ◽  
Hydrothermal Process ◽  
Light Condition ◽  
High Photocatalytic Activity ◽  
Methylene Blue Degradation ◽  
Sunlight Irradiation ◽  
Adsorption Desorption

In this study, walnut-shaped V2O3 particles with high photocatalytic activity in the visible light were synthesized by hydrothermal process. The V2O3 samples synthesized with the various temperature conditions of the hydrothermal process were characterized using XRD, SEM, TEM, UV-Visible spectrometer and N2gas adsorption/desorption analysis. For investigating the photocatalytic performance of synthesized V2O3 particles in the visible light condition, photodegradation experiments of methylene blue (MB) solution under artificial sunlight irradiation was conducted. As a result, the V2O3 hydrothermal-synthesized at 280 °C was composed of pure V2O3 crystal structure and showed high photocatalytic activity for the degradation of MB dye in visible light.

Facile Preparation of Nanoporous SnO2 for Application in Photodegradation of Methylene Blue

2011 ◽  
Vol 194-196 ◽  
pp. 385-388
Author(s):  
Hong Juan Wang ◽  
Feng Qiang Sun ◽  
Ming Zhong Ren ◽  
Qing Wei Guo
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
N2 Adsorption ◽  
Photochemical Method ◽  
Degussa P25 ◽  
Adsorption Desorption

Nanoporous SnO2with high photocatalytic activity has been successfully prepared by a photochemical method, using SnCl2aqueous solution as a precursor. The as-synthesized sample was characterized by XRD, N2 adsorption-desorption and UV-vis. The photocatalytic activity of the sample was evaluated by degrading methylene blue (MB) aqueous solution under the UV light source and was compared with that of the commercial titania (Degussa P25). The results showed that the produced SnO2can degrade MB solution quickly and has comparative photocatalytic performance with P25 for degrading MB. This facile method supplies an effective way to prepare SnO2photocatalyst.

scholarly journals Preparation and Characterization of(I2)nSensitized NanoporousTiO2with Enhanced Photocatalytic Activity under Visible-Light Irradiation

2012 ◽  
Vol 2012 ◽  
pp. 1-8
Author(s):  
Juzheng Zhang ◽  
Xin Liu ◽  
Shanmin Gao ◽  
Quanwen Liu ◽  
Baibiao Huang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance Spectroscopy ◽  
Chemical Properties ◽  
Reaction Model ◽  
Raw Material ◽  
Transmission Electron ◽  
Different Temperatures ◽  
Adsorption Desorption

A yellow/brown powder of(I2)nsensitized nanoporous TiO2was obtained via an hydrolysis with TiCl4and iodine hydrosol as raw material. I2nanoparticles in the hydrosol were used as seeds to initiate the nucleation of a precursory TiO2shell. The hybridized jumbles were further calcinated at different temperatures. The structure, crystallinity, morphology, and other physical-chemical properties of the samples are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2adsorption-desorption isotherms measurements, and UV-vis diffuse reflectance spectroscopy (DRS). The formation mechanism of these(I2)nsensitized nanoporous TiO2is discussed. Methylene blue solutions were used as model wastewater to evaluate the visible light photocatalytic activity of the samples. The results indicate that iodine can exist even in high-temperature calcination for iodine being encapsulated in the nanocavities inside TiO2. The degradation of methylene blue (MB) accorded with the first-order reaction model.

scholarly journals Synthesis of copper oxide nano-rice structures for enhancement of photocatalytic activity under natural sunlight

2019 ◽  
Vol 20 (5) ◽  
pp. 253-262
Author(s):  
Roonak Abdul Salam A.Alkareem
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Electron Microscope ◽  
Copper Oxide ◽  
High Photocatalytic Activity ◽  
X Ray Diffraction ◽  
Methylene Blue Degradation ◽  
X Ray ◽  
Uv Visible ◽  
Scanning Electron

In this work, copper oxide (CuO) nano-rice structure was prepared by hydrothermal method. The prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and UV-visible spectrophotometer. CuO nano-rice structure showed high photocatalytic activity towards degradation of methylene blue (MB). Hydrothermally growth of CuO provided uniformly distributed nano-rice structures with high degradation efficiency (90.41%) and rate constant (kt) 16.6 × 10-2 min-1 for methylene blue degradation.

scholarly journals Green one-step synthesis of cellulose nanocrystal/ ZnO nanohybrid with high photocatalytic activity

2021 ◽  
Vol 5 (3) ◽  
pp. first
Author(s):  
An Nang Vu ◽  
Anh Mai Tran ◽  
Nghi Tuyet Nguyen ◽  
Duyen My Ngoc Lam ◽  
Phong Pham Nam Le ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Zno Nanoparticles ◽  
Low Cost ◽  
Nitrogen Adsorption ◽  
High Photocatalytic Activity ◽  
Pure Cellulose ◽  
Nypa Fruticans ◽  
One Step ◽  
Adsorption Desorption

In this work, nanohybrid of zinc oxide/ cellulose nanocrystals (ZnO/CNC) was successfully prepared by using a low cost and green method for photocatalytic degradation of methylene blue (MB). CNC had been derived through the hydrolysis reaction by citric/hydrochloric acid from the pure cellulose isolated from Vietnamese Nypa fruticans trunk. The obtained CNC with carboxyl groups could act as a stabilizing and supporting agent to anchor ZnO nanoparticles. The chemical and crystal structures, morphology, thermal and photocatalytic properties of the ZnO/CNC nanohybrid were characterized by FESEM, FTIR, XRD, FESEM, BET, EDX, TGA, DRS and photocatalytic tests. Analyses of FTIR spectra, XRD, and FESEM indicated that the ZnO nanocrystals with the size of 50 nm formed and loaded on the surface of CNC. The TGA analysis demonstrated that the ZnO loading sample (ZnO/CNC) had the thermal degradation onset temperature higher than that of neat CNC. ZnO/CNC cuold be absorpted ultraviolet light and have high value of specific surface area (SBET), based on the DRS spectra and the nitrogen adsorption – desorption isotherms analysis, respectively. ZnO/CNC displayed more photocatalytic activity than pure ZnO upon degradation of methylene blue due to strong interaction between the CNC and ZnO nanoparticles. The maximum degradation of MB was about 95% in 150 minutes for the ZnO/CNC.

scholarly journals MODIFICATION OF TITANIUM DIOXIDE NANOMATERIALS BY SULFUR FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE EVEN UNDER VISIBLE LIGHT

2018 ◽  
Vol 54 (2A) ◽  
pp. 164
Author(s):  
Nguyen Tan Lam
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Sodium Sulfate ◽  
High Photocatalytic Activity ◽  
Doped Titanium Dioxide ◽  
Modification Of Titanium ◽  
Very High

This paper presents a study on preparation of sulfur doped titanium dioxide using potassium fluorotitanate and sodium sulfate as precursors. The obtained results indicated that the doped TiO2 exhibited very high photocatalytic activity for degradation of methylene blue even under visible light. The increasing in the added sulfur amounts led to significantly increase in the degradation of methylene blue. When the S/TiO2 mole ratios increased from 10 to 25%, the degradation of methylene blue under compact light increased from 30.87% to 67.06%, respectively.

scholarly journals Hydrothermal Synthesis and Enhanced Photocatalytic Activity of TiO\(_{2}\)-Fe@CNTs Nanocomposite for Methylene Blue Degradation under Visible Light Irradiation

2015 ◽  
Vol 24 (4) ◽  
pp. 363
Author(s):  
Le Ha Chi ◽  
Pham Duy Long ◽  
Nguyen Van Chuc ◽  
Le Van Hong
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Uv Light ◽  
Band Gap Energy ◽  
Nanocomposite Materials ◽  
Light Irradiation ◽  
Hydrothermal Route ◽  
Methylene Blue Degradation

TiO2 is one of the most attractive metal oxides because of the excellent chemical and photocatalytic properties. However, a problem in the application of TiO2 is the large band gap energy of 3.2 eV, corresponding to its photocatalytic activity under UV-light irradiation of wavelengths <387 nm. In this work, TiO2 nanoparticles doped with iron were grown on the surface of functionalized carbon nanotubes (TiO2-Fe@CNTs) to expand the photoabsorbance of the nanocomposite materials in the visible light region and improve their photocatalytic activity. TiO2-Fe@CNTs nanocomposite materials were synthesized by hydrothermal route in Teflon-sealed autoclave at 180oC for 10h. The FE-SEM and X-Ray diffraction measurements were taken for morphology and structural analysis of TiO2 nanoparticles doped with Fe coating on CNTs. The effects of the iron and CNTs on the enhanced photocatalytic activity for methylene blue degradation under AM 1.5 illumination of 100 mW.cm−2 were investigated.

A Novel Magnetically Separable Photocatalyst Silver Vanadate@ SiO2/Fe3O4

2011 ◽  
Vol 356-360 ◽  
pp. 455-458
Author(s):  
Long Hui Nie ◽  
Ya Peng Meng ◽  
Bo Rui Yang ◽  
Zheng Qiang Xiao ◽  
Lei Fang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Hydrothermal Process ◽  
High Photocatalytic Activity ◽  
Main Phase ◽  
Prepared Sample ◽  
Silver Vanadate ◽  
Magnetically Separable ◽  
Degradation Of Methyl Orange

A magnetically separable photocatalyst silver vanadates@SiO2/Fe3O4was prepared by hydrothermal process. The prepared sample was composed of mixed phases of a–Ag3VO4and Ag4V2O4, and the main phase was a–Ag3VO4. The bandgap of the synthesized sample was 2.2 eV. In the degradation of methyl orange (MO) solution under the visible light (l>420 nm), the silver vanadates@SiO2/Fe3O4showed high photocatalytic activity in two-cycle photocatalytic test.

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