Preparation of Ag-TiO2 hollow structures with enhanced photocatalytic activity

Preparation of TiO2 loaded with crystalline nano Ag by a one-step low-temperature hydrothermal method

“…4 Compared to other noble metals, silver has a relatively low cost, bactericidal property, 5 oxygen adsorption behavior 6 and high sensitivity to special gases, such as H 2 S gas, 7 therefore, a large number of investigations on the preparation of Ag/TiO 2 have been carried out. [8][9][10][11][12][13] Among them, the UV irradiation reduction deposition method is a common and conventional method which results in TiO 2 loaded with amorphous Ag (a-Ag/TiO 2 ). 9 However, the Schottky barrier between crystalline Ag and TiO 2 semiconductor may trap photogenerated electrons a lot more easily than that between amorphous Ag and TiO 2 .…”

“…9,10 Hydrothermal or solvothermal methods using reductive agents to prepare crystal Ag/TiO 2 have been reported. Lai et al, 11 reported a sol-gel and hydrothermal process to prepare Ag nanoparticles/TiO 2 nanostructures using ethanol and acetoacetate, Wu et al, 12 prepared a montmorillonite-supported Ag/TiO 2 composite through a solvothermal technique using ethanol, Song et al, 13 described a one-pot surfactant-assisted hydrothermal method for the synthesis of Ag-TiO 2 composite hollow structures using cetyltrimethylammonium bromide as surfactant. All the reported methods used organic reagents as reductive agents.…”

Gram-scale wet chemical synthesis of Ag2O/TiO2 aggregated sphere heterostructure with high photocatalytic activity

“…Titanium dioxide (TiO 2 ) as an important semiconductor photocatalyst has received enormous attention, particular in its photodegradation of organic contaminations for environmental cleanup [1][2][3][4][5][6]. However, a further enhancement of photoactivation of TiO 2 is limited by its large energy band gap (3.2 eV) and fast electron-hole recombination in irradiation of sunlight [7,8].…”

Preparation and characterisation of Ag modified rutile titanium dioxide and its photocatalytic activity under simulated solar light

“…However, it is reported that single rutile TiO 2 shows less photocatalytic activity compared to anatase or anatase/rutile TiO 2 due to its big crystallite size, poor oxygen and hydroxylation [9]. Therefore, almost all the Ag modified TiO 2 focus on anatase phase [3,6,[10][11][12][13][14][15] or anatase/rutile mix phase [7,8,16].…”