Microwave Synthesis and Photocatalytic Activity of CeVO4 Nanocrystalline

2014 ◽  
Vol 1081 ◽  
pp. 146-150 ◽  
Author(s):  
Cong Sen Wang ◽  
Xiao Dong Chen ◽  
Xue Hong Liao
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Raw Materials ◽  
Layer Structure ◽  
Sodium Dodecyl ◽  
X Ray Diffraction ◽  
Methylene Orange ◽  
Degradation Ratio ◽  
Cerium Vanadate

Cerium vanadate nanocrystalline was prepared by cerium nitrate, vanadium (V) oxide as raw materials and sodium dodecyl sulfate as surfactant under microwave irradiation. The sample was characterized by X-ray diffraction (XRD) and scanning electron micrograph (SEM). The XRD show that the as-prepared sample calcined at 773 K is tetragonal zircon, and the SEM graph show that the as-prepared CeVO4nanocrystalline is layer structure formated of small particles aggregation. We studied the photocatalytic activity of the as-prepared samples by using degradation of methyl orange in visible light. It shows that the photocatalytic activity of Cerium vanadate nanocrystalline was very well. The effects of different factors such as calcination temperature and the concentration of methyl orange on the characterization of CeVO4are discussed. It found that when the catalyst calcined at 873 K was 0.10 g, and 0.3 mL hydrogen peroxide joined as well as, pH was 2.0, the degradation ratio of CeVO4for methylene orange of 100 mL 20 mg/L reached 87% in 80 min.

The Microwave Synthesis and Photocatalytic Activity of InVO4 Nanocrystalline

2014 ◽  
Vol 906 ◽  
pp. 200-203
Author(s):  
Jian Lei ◽  
Quan Xin Zhu ◽  
Wan Qing Xiong ◽  
Wen Xiang Ye ◽  
Xue Hong Liao
Keyword(s):  
Photocatalytic Activity ◽  
Raw Materials ◽  
Sodium Dodecyl ◽  
X Ray Diffraction ◽  
Scanning Electron Micrograph ◽  
Indium Chloride ◽  
X Ray ◽  
Methylene Orange ◽  
Degradation Ratio ◽  
Degradation Of Methyl Orange

Indium vanadate nanocrystalline was prepared by Indium chloride, vanadium (V) oxide as raw materials and sodium dodecyl sulfate as surfactant under microwave irradiation. The sample was characterized by X-ray diffraction (XRD), scanning electron micrograph (SEM). We studied the photocatalytic activity of the as-prepared samples using degradation of methyl orange in visible light. It shows that the photocatalytic activity of Indium vanadate nanocrystalline was very well. It found that when the catalyst calcined at 773 K was 0.10 g, and 0.3 mL hydrogen peroxide joined as well as pH was 2.0, the degradation ratio of InVO4 for methylene orange of 100 mL 2 mg/L reached 75% in 50 min.

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.

Characterization and Photocatalytic Activity of Microspheres ZnO by Hydrothermal Method

2019 ◽  
Vol 814 ◽  
pp. 487-492
Author(s):  
Xi Hao Lin ◽  
Pei Song Tang ◽  
Bei Bei Wang ◽  
Hai Qiang Tang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Hydrothermal Method ◽  
Diffuse Reflectance Spectroscopy ◽  
Raw Materials ◽  
Average Diameter ◽  
High Photocatalytic Activity ◽  
X Ray Diffraction ◽  
Excellent Photocatalytic Activity ◽  
Ultraviolet Light Irradiation

Using zinc acetate, glycerol alcohol and sodium hydroxide as principal raw materials, the ZnO microspheres were prepared by hydrothermal method at 200°C. The samples were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and diffuse reflectance spectroscopy (DRS). Using methyl orange as the degradation object, the photocatalytic activities and recycling stability of ZnO were characterized. The results show that ZnO samples are spherical and the average diameter is approximately 3-4μm. Moreover, the bandgap width is 3.1eV. Under ultraviolet light irradiation, it is testified that ZnO shows a excellent photocatalytic activity for the degradation of methyl orange. From experience, we can draw a conclusion that the ZnO samples were in line with first-order kinetics, with an apparent rate constant of 0.016min-1. At the same time, ZnO showed excellent recycling performance. Although the samples have been recycled three times, it still maintained high photocatalytic activity.

Preparation and Characterization of Pr2Ti2O7 by Sol-Gel Process

2017 ◽  
Vol 748 ◽  
pp. 413-417
Author(s):  
Chun Yu Long ◽  
Fang Fang Peng ◽  
Min Min Jin ◽  
Pei Song Tang ◽  
Hai Feng Chen
Keyword(s):  
Methyl Orange ◽  
Single Phase ◽  
Raw Materials ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Illumination Time ◽  
X Ray ◽  
Sol Gel Process ◽  
Ft Ir

Using Pr (NO3)3, butyl titanate, ethylene glycol and citric acid as main raw materials, praseodymium titanate (Pr2Ti2O7) was prepared by the sol-gel process. The samples were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), thermal gravity-differential thermal analysis (TG-DTA), diffuse-reflection spectra (DRS) and Fourier transform infrared (FT-IR). The effect of different calcination temperature and illumination time on the photocatalytic properties of Pr2Ti2O7 was investigated. It was found that the single phase Pr2Ti2O7 could be obtained through sol-gel process and calcination at 1000 °C. The Pr2Ti2O7 samples calcination at 1000 °C were uniform , and the resulting product had a particle size of 200 nm and an optical band gap of 3.26 eV. Under ultraviolet light, the degradation of methyl orange arrived to 80.11% after 180 min of photocatalytic reaction. The Pr2Ti2O7 samples showed good photocatalytic activity for decomposition of methyl orange.

Preparation and Characterization of YMnO3 by Microwave Assisted Process

2017 ◽  
Vol 748 ◽  
pp. 428-432 ◽  
Author(s):  
Fang Fang Peng ◽  
Min Min Jin ◽  
Chun Yu Long ◽  
Pei Song Tang ◽  
Hai Feng Chen
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Light ◽  
Raw Materials ◽  
Manganese Acetate ◽  
Yttrium Nitrate ◽  
X Ray Diffraction ◽  
Microwave Assisted ◽  
Average Grain Size ◽  
Excellent Photocatalytic Activity

Using yttrium nitrate (Y(NO3)3·6H2O), manganese acetate (MnC4H6O4·4H2O), citric acid (C6H8O7·H2O) and urea (CH4N2O) as major raw materials, the YMnO3 was prepared by microwave assisted method. The structure and morphology of samples were characterized by thermogravimetric analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared (FT-IR). The results show that the YMnO3 was successfully prepared by microwave process and calcined from 750°C to 1050°C. When the calcination temperature is 850°C, the grain of YMnO3 has good uniformity and the average grain size of 80-100 nm. Under UV-light irradiation, the photocatalytic activity of YMnO3 was studied for methyl orange (MO) used as simulated sewage. The photocatalytic experiment show that the YMnO3 exhibited excellent photocatalytic activity for degradation methyl orange.

The Microwave Synthesis and Photocatalytic Activity of ZnO/TiO2 Nanocomposites

2013 ◽  
Vol 651 ◽  
pp. 187-192 ◽  
Author(s):  
Gang Cheng Zhou ◽  
Quan Xin Zhu ◽  
Wan Qing Xiong ◽  
Jian Lei ◽  
Wen Xiang Ye ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Transmission Electron Microscopy ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Microwave Irradiation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Degradation Ratio

ZnO/TiO2 nanocomposites were prepared by mixing of ultrasonic vibration and sintering at 500°C for 2 h initial nano-ZnO and nano-TiO2 which were synthesized by a microwave irradiation heating technique from an aqueous solution of Zn(Ac)2•2H2O, Ti(SO4)2, respectively. The samples were characterized by the techniques of X-ray diffraction (XRD) and transmission electron microscopy (TEM). And we have also carried on research to the photocatalytic activity of the as-prepared ZnO/TiO2 nanocomposites by photo-degrading methyl orange. The result indicates that the as-prepared sample is a good photocatalyst. When m (TiO2) /m (ZnO) ratio was equal to 4, the photocatalytic activity of the nanocomposites is best. The result shows that the degradation ratio of the methyl orange (2mg/L) has reached 93% within 80 min

Preparation of LaVO4 by Microwave Process and its Photocatalytic Activity

2016 ◽  
Vol 852 ◽  
pp. 538-541
Author(s):  
Shu Yu Zhong ◽  
Hai Shao Ye ◽  
Ji Qi Jiang ◽  
Qian Yang ◽  
Pei Song Tang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Diffuse Reflectance Spectroscopy ◽  
Uv Light ◽  
Raw Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

Using La (NO3)3·6H2O, NH4VO3, citric acid as the main raw materials, nanocrystalline LaVO4 sample was prepared by microwave method. The structure and morphology of sample were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible diffuse reflectance spectroscopy (DRS) and Fourier Transform Infrared (FT-IR) spectroscopy. The photocatalytic activity of LaVO4 was studied for methyl orange (MO) used as simulated sewage. The XRD and SEM showed that the particle size of LaVO4 was about 80-100 nm. The DRS showed that LaVO4 had optical absorption onset of 356 nm, indicating the optical band gap of 3.48 eV. The FT-IR showed that LaVO4 had vibration peaks of Fe-O and V-O bond. Under UV-light, the photocatalytic experiment indicated that the prepared LaVO4 nanocrystalline had highly photocatalytic activity for degradation of methyl orange.

PEG-Assisted Hydrothermal Synthesis and Photocatalytic Activity of Bi2Fe4O9 Crystallites

2011 ◽  
Vol 1292 ◽  
Author(s):  
Dengrong Cai ◽  
Jianmin Li ◽  
Shundong Bu ◽  
Shengwen Yu ◽  
Dengren Jin ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance Spectrum ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
Peg 400 ◽  
Transmission Electron ◽  
Light Region ◽  
Facile Hydrothermal Route ◽  
Degradation Ratio

ABSTRACTA facile hydrothermal route assisted by polyethylene glycol (PEG) 400 was utilized to synthesize single-phase Bi2Fe4O9 crystallites. X-ray diffraction results showed the products with PEG 400 of 30 g/L exhibited a preferred growth along the (001) plane. Transmission electron microscopy indicated that the morphology of the as-prepared Bi2Fe4O9 crystallites with PEG 400 were plake-like and rod-like. Strong absorption in visible-light region of the products was characterized by UV-vis diffuse reflectance spectrum (UV-DRS). The photocatalytic activity of Bi2Fe4O9 crystallites was evaluated on degradation of methyl orange (MO) under visible light irradiation. For 3 h irradiation, the degradation ratio was increased to 93% with the aid of a small amount of H2O2. The analysis of FT-IR spectra proved that the Bi2Fe4O9 catalysts were remained stable after the photocalytic reactions.

Preparation and Photocatalytic Activity of Cu/BiVO4 by Solid State Grinding Method for Degradation of Methyl Orange

2016 ◽  
Vol 703 ◽  
pp. 321-325
Author(s):  
Hai Feng Chen ◽  
Jia Mei Chen ◽  
Zhi Xue Pan
Keyword(s):  
Methyl Orange ◽  
Solid State ◽  
Visible Light ◽  
Raw Materials ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Illumination Time ◽  
Grinding Method ◽  
Ft Ir ◽  
Degradation Of Methyl Orange

In this work, novel Cu/BiVO4 photocatalyst were prepared by a low-temperature solid state grinding method using Bi (NO3)3•5H2O, NH4VO3 and Cu (NO3)2•2H2O as raw materials. The structure and properties of the samples were characterized by Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD) and UV-vis diffused reflectance spectroscopy (DRS); Using the degradation of methyl orange (MO) as the probe, it was simulated as the degradation of sewage under the visible light to study the influence of the illumination time and the amount of photocatalysts. Compared with the pure BiVO4, the visible-light absorption scope of BiVO4 was broadened by doping Cu, the UV-Visible absorption edges were slightly red shift and the band gap was narrower. Comparatively speaking, the results indicted that the doped Cu enhanced the photocatalytic activities of BiVO4.

Sign in / Sign up

Export Citation Format

Share Document