Untitled

Low-Temperature Synthesis of Nanometer-Sized Crystalline TiO2 Particles and Their Photoinduced Decomposition of Formic Acid

“…Clearly, the balance of and EtOH in the solvent is important for the crystal formation in the NAC-FAS process. The same has also been observed in other oxide systems such as ZnO (11,12) and Fe 2 O 3 (17). Figure 3 shows the dependence of the specific surface area (S) and the relative anatase crystallinity (X) on calcining temperature (T c ).…”

“…However, the particles prepared in these ways are unsuitable for photocatalysts because of low crystallinity, small surface area, and/or impurity (SO 4 2Ϫ ). A novel method for preparing various nanometer-sized metal oxides with high crystallinity at low temperatures (Ͻ373 K) has recently been developed (11)(12)(13). This method, termed nanometer-sized crystalline from alcoholic solution (NAC-FAS) method, involves the reflux of an H 2 O-alcohol mixed solution containing metal chelate complexes or metal salts.…”

Synthesis from zinc oxalate, growth mechanism and optical properties of ZnO nano/micro structures

“…[5]. Various chemical methods were adopted over the past few years to prepare ZnO nano or micro scaled particles in various sizes and morphologies, starting from conventional solid-state process [6], precipitation [7], hydrolysis [8], pyrolysis [9], hydrothermal methods [10,11] and sol-gel technique [12,13]. These methods could facilitated the control of the size and morphology of the ZnO crystallites by optimizing various parameters such as pH, annealing temperature, reaction medium, presence of additives, counter-ion etc.…”

Cobalt Ion-Doped TiO2 Photocatalyst Response to Visible Light

“…From a practical point of view, other processes for endowing TiO 2 with a vis light response are desirable. Recently, we have developed a low-temperature process for preparing nanometer-sized metal oxides (ZnO, TiO 2 , Fe 2 O 3 ) with high crystallinity, termed NAC-FAS (nanometer-sized crystal formation in alcoholic solutions) method (4)(5)(6)(7)(8). The NAC-FAS TiO 2 particles give a high photocatalytic activity under ultraviolet (UV) light irradiation (7).…”