A green method to prepare TiO2/MWCNT nanocomposites with high photocatalytic activity and insights into the effect of heat treatment on photocatalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13430-13436 ◽  
Author(s):  
Qingping Zeng ◽  
Hua Li ◽  
Huanan Duan ◽  
Yiping Guo ◽  
Xuefa Liu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Uniform Loading ◽  
Green Method

We demonstrate a green method to prepare TiO2/MWCNT with uniform loading and high photocatalytic activity, and study the effect of heat treatment on the photocatalytic activity.

Preparation of titanium(IV) oxide film on a hard alumite substrate

2002 ◽  
Vol 17 (9) ◽  
pp. 2373-2378 ◽  
Author(s):  
Yoshie Ishikawa ◽  
Yasunori Hayashi ◽  
Yasumichi Matsumoto
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Sulfuric Acid ◽  
Oxide Film ◽  
Deposition Temperature ◽  
High Photocatalytic Activity ◽  
Fluorescent Lamp ◽  
Alumina Film ◽  
Anatase Structure ◽  
Lamp Illumination

TiO2 was deposited onto hard alumite (Al/Al2O3/TiO2) by alternating current electrolysis and precipitation in (NH4)2[TiO(C2O4)2] solution at various temperatures, where the hard alumite was prepared by the anodic oxidation of aluminum in sulfuric acid (Al/Al2O3). The TiO2 electrodeposition mainly occurred at temperatures lower than about 50 °C, while the TiO2 deposition due to TiO(C2O4)22− adsorption onto alumina predominantly occurred at temperatures higher than about 50 °C. The amount of deposited TiO2 increased with the increase in the deposition temperature, leading to high photocatalytic activity. The deposited TiO2 at 90 °C followed by heat-treatment at 550 °C had an anatase structure and showed a high photocatalytic activity for the decomposition of acetaldehyde even under fluorescent lamp illumination. The Al/Al2O3/TiO2 prepared at 50 °C was optimal for practical use, because of a relatively high activity and the sufficient adhesion strength between the TiO2 and the Al/Al2O3 substrate due to the presence of the deposited TiO2 in the pores of the alumina film.

scholarly journals Evaluation of photocatalytic activities in decomposition of methylene blue in aqueous solution of Mn-ZIF-8 and Mn@Zn

2021 ◽  
Vol 10 (1) ◽  
pp. 116-121
Author(s):  
Hieu Nguyen Trung ◽  
Du Pham Dinh
Keyword(s):  
Heat Treatment ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Uv Radiation ◽  
Treatment Time ◽  
Manganese Content ◽  
Suitable Condition ◽  
High Photocatalytic Activity ◽  
Zeolitic Imidazolate Framework ◽  
Decomposition Efficiency

In the present study, manganese modified zeolitic imidazolate framework-8 (Mn-ZIF-8) and zinc-manganese bimetallic oxides (denoted as Mn@Zn), which was formed by Mn-ZIF-8 heat treatment, had been prepared and applied as photocatalysts to decompose methylene blue (MB) under UV radiation. The influence of manganese content on the structure of ZIF-8, as well as the temperature and heat treatment time of Mn-ZIF-8 material to produce Mn@Zn with high photocatalytic activity was investigated. Results showed that all Mn-ZIF-8 samples have photocatalytic activity, but the MB decomposition efficiency of Mn-ZIF-8 samples were lower than pure ZIF-8. The suitable condition for heat treatment of Mn-ZIF-8 to produce Mn@Zn with high photocatalytic activity was at 500 ºC for 5 hours. However, the MB decomposition efficiency of this sample only reached 22% after 180 minutes of UV radiation.

Effects of Heat Treatment Temperature on Photocatalytic Activity of TiO2/SiO2 Composite Aerogels

2013 ◽  
Vol 27 (10) ◽  
pp. 1079-1083
Author(s):  
Zhao-Hui LIU ◽  
Gen-Liang HOU ◽  
Xun-Jia SU ◽  
Feng GUO ◽  
Zhou XIAO ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Composite Aerogels

A copper anchored on phosphorus g-C3N4 as a highly efficient photocatalyst for synthesis of N-arylpyridin-2-amines

2021 ◽  
Author(s):  
Jia-Qi Di ◽  
Mo Zhang ◽  
Yu-Xuan Chen ◽  
Jin-Xin Wang ◽  
Shan-Shan Geng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Recyclable Catalyst ◽  
Highly Efficient ◽  
Phosphorus Doped

A heterogeneous photocatalyst based on copper modified phosphorus doped g-C3N4 (Cu/P-CN) has been prepared and characterized. This recyclable catalyst exhibited high photocatalytic activity for the synthesis of N-arylpyridin-2-amine derivatives by...

Carbon Nitride Functionalized with Sb Resulting in High Photocatalytic Activity

2021 ◽  
Author(s):  
Luhong Zhang ◽  
Zhengyuan Jin ◽  
Jiyu Huang ◽  
Yiyue Zhang ◽  
Shaolong Huang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Carbon Nitride ◽  
High Photocatalytic Activity

Engineering Nanocrystalline Titania Thin Films for High Photocatalytic Activity

2019 ◽  
Vol 9 ◽  
pp. 621-626 ◽  
Author(s):  
Vijila Kalarivalappil ◽  
Baiju K.Vijayan ◽  
Viswanathan Kumar
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Nanocrystalline Titania

scholarly journals Study of the Effect of TiO2 Layer on the Adsorption and Photocatalytic Activity of TiO2-MoS2 Heterostructures under Visible-Infrared Light

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
N. Cruz-González ◽  
O. Calzadilla ◽  
J. Roque ◽  
F. Chalé-Lara ◽  
J. K. Olarte ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Nitrogen Adsorption ◽  
High Photocatalytic Activity ◽  
Infrared Light ◽  
Polluted Water ◽  
Light Spectrum ◽  
X Ray

In the last decade, the urgent need to environmental protection has promoted the development of new materials with potential applications to remediate air and polluted water. In this work, the effect of the TiO2 thin layer over MoS2 material in photocatalytic activity is reported. We prepared different heterostructures, using a combination of electrospinning, solvothermal, and spin-coating techniques. The properties of the samples were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, UV-Vis diffuse reflectance spectroscopy (UV-Vis-DRS), and X-ray photoelectron spectroscopy (XPS). The adsorption and photocatalytic activity were evaluated by discoloration of rhodamine B solution. The TiO2-MoS2/TiO2 heterostructure presented three optical absorption edges at 1.3 eV, 2.28 eV, and 3.23 eV. The high adsorption capacity of MoS2 was eliminated with the addition of TiO2 thin film. The samples show high photocatalytic activity in the visible-IR light spectrum.

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