Synthesis and Characterization of TiO2/Au Nanocomposite Using UV-Irradiation Method and Its Photocatalytic Activity to Degradation of Methylene Blue

Abstract

Gold doped TiO2 has been successfully synthesized via photolysis method and is characterized by different techniques. Nanoparticles of gold doped TiO2 were utilized for the degradation of methylene blue as a material pigmentation pollutant. The substitution of Au on TiO2 surface was confirmed by XRD, EDX, TEM and FTIR techniques. The TEM and SEM results showed that the particles are in nano range and its size is below 15 nm. Without a catalyst, the degradation of the dye under visible light in acid and natural medium gives a modest result, but a better results at pH 11 while it gives an excellent result at all conditions when using a catalyst.

Gama-Fe2O3 silica-coated 2-(2-benzothiazolyl azo)-4-methoxyaniline for supercapacitive performance

“…Potassium ferric oxalate K3[Fe(C2O4)3]3H2O was used as a source for synthesis of -Fe2O3 nanoparticles by photolysis method [16][17][18]. In a 125 W irradiation system, 1 g of ferric complex solution was irradiated for 30 min until a yellow precipitate of ferrous oxalate was formed.…”

Semiconductor Metal Oxide Nanoparticles: A Review for the Potential of H2S Gas Sensor Application

“…As a general base, decreasing the size of grain and particles causes increasing the surface area of oxide [29][30][31][32][33][34][35][36][37][38][39][40][41][42] for adsorbing the gas molecules and this leads to higher response of the sensor. As well as decreasing of grain exposes the surface to depletion of electrons during exposing the sensor for air.…”

Solar Light Induced Photocatalysis for Treatment of High COD Pharmaceutical Effluent with Recyclable Ag-Fe Codoped TiO2: Kinetics of COD Removal

“…[30][31][32] Fe content in nanoparticles were kept 0.5% by weight. 14,17,18 Fig. 1 represents steps for the synthesis of Ag-Fe co-doped TiO 2 nanoparticles.…”

“…[6][7] Many researchers have worked on synthesis, morphology and optical properties improvement by doping. [17][18][19] Some researchers have worked on photocatalysis using immobilized TiO 2 such as nanotube, 20 nanofilm [21][22] and nanowire 23 which can be less poisoned compared to nanopowders from treated water; but these structures will provide less surface area compared to suspended catalysts. At present, only few research focused on the recyclability of photocatalysts [8][9][10] which is one of the desired properties.…”