“…In recent years,éGreen Chemistryêprocesses, which are based on low-energy, low-cost, less-waste, less-burden and etc., have been increasingly required. 2 In order to enhance harmony between a solution method and environment, starting materials should be improved. For example, titanium is used as a strong acidic aqueous solution of TiCl 4 or as an alkoxide in combination with organic solvents, because of rapid hydrolysis of its compounds.…”