TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The heat treatment of titanium-carbon composite particles is performed at 150-550 degrees C. Preferred Components: The titanium precursor is titanium isopropoxide, titanium ethoxide, titanium butoxide, titanium tetraisopropoxide, and/or titanium tetrachloride. The doping material is zinc, vanadium, chromium, nickel, manganese, and/or iron. The doping material precursor is zinc acetate, zinc chloride, methyl zinc, and/or zinc cetyl. The temperature of the heat-treated titanium precursor mesoporous microsphere particle is 150-550 degrees C.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The first solvent is a mixed aqueous solution of ethanol and potassium chloride. The solvent used in the heat treatment of titanium-carbon composite particle is a mixed aqueous solution of the ammonium hydroxide and ethanol, and/or 1-propanol.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The surface directing agent is hexadecylamine, and/or triblock copolymer P123 (polyethylene oxide 20-polypropylene oxide 70-polyethylene oxide 20). EXAMPLE - 4 g Hexadecylamine was dissolved in solution comprised of 400 ml ethanol and 1.9 ml 0.1 M potassium chloride solution. The solution was vigorously stirred and 9 ml titanium isopropoxide was added to form first solution. Then, the first solution was allowed to stand at room temperature for 24 hours to form particles. The resulting particles were washed 3 times with distilled water, and dried at 50 degrees C. 4 g Dried particles were dispersed in 20 ml of ethanol, and added with 10 ml distilled water and 1 ml ammonium hydroxide aqueous solution. Then, the first dispersion was added into Teflon (RTM: Polytetrafluoroethylene) coated autoclave, and heat treated at 160 degrees C for 10 hours. The heat-treated particles was recovered by filtration and then washed 3 times with distilled water and dried at 50 degrees C. The obtained particles were dissolved in 0.005 M zinc acetate dihydrate and 15 ml ethanol solution, and again vigorously stirred for 24 hours and heated at 500 degrees C for 24 hours to obtain zinc-doped mesoporous titanium dioxide microspheres particles.