Photocatalytic oxidation of gaseous benzene over nanosized TiO2 prepared by solvothermal method

Abstract

Nanosized TiO 2 particles were prepared by solvothermal method using tetrabutyl titanate as precursor, ethanol and water as solvents, and a facile immobilization method of nanosized TiO 2 particles on woven glass fabric was developed. The samples obtained under various preparation conditions were characterized by means of thermo gravimetric analysis (TG) and differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution-transmission electron microscopy (HR-TEM), and Brunauer-Emmett-Teller (BET). The results show that the cube-shape of TiO 2 prepared by solvothermal method has good crystallinity of (101) surface, higher thermal stability and large specific surface area. Scanning electron microscopy (SEM) images confirmed that the immobilized TiO 2 film was uniformly distributed and clung to the substrate firmly. The photocatalytic activity of the catalysts was tested using photocatalytic oxidation of gaseous benzene. The results show that the TiO 2 calcined after solvothermal treatment suffers from lower specific surface area, and hence decreases its photocatalytic activity. The photocatalytic activities of the TiO 2 by solvothermal treatment with or without calcination in degradation 400 mg/m 3 benzene are 3.7 and 4.1 times as high as catalyst without solvothermal treatment, respectively.

Band structure and visible light photocatalytic activity of multi-type nitrogen doped TiO2 nanoparticles prepared by thermal decomposition

“…The lattice fringes of 0.352 nm matches that of the (1 0 1) crystallographic plane of anatase TiO 2 [22]. Some crystals with clear edges can also be seen from Fig.…”

“…Therefore, it is expected that a greater number of hydroxyl groups yield a higher photocatalytic activity [22,29].…”

Photocatalytic Activity of TiO2 Nanostructured Arrays Prepared by Microwave-Assisted Solvothermal Method

“…As mentioned above, the use of different solvents could strongly affect the crystalline phase and microstructure of TiO 2 structures and its facets, due to the different boiling points, chain lengths and structure, possible complexes and polarity of the solvents used [44][45][46][47]. For this case, the selection of the solvent should consider the high extracting power and strong interaction with electromagnetic field.…”

Protective Clothing Based on Electrospun Nanofibrous Membranes

“…Lightweight fabrics commonly worn in summer are known to provide insufficient protection against UV radiation. The formation of UV-protective coating surfaces on textiles, particularly those based on dip-padcure and dip-coating processes and solgel and hydrothermal methods, has been studied extensively by many researchers [53][54][55]. Some inorganic oxides, such as ZnO, TiO 2 , and cerium dioxide (CeO 2 ), have been widely used in the field of UV blocking; this has included applications on the surface of textile fabrics to provide UV protection.…”