TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Process: The preparation of titanium dioxide micro-spheres comprises either (a) dropping titanic acid tetraethyl into glycol slowly at room temperature according to a volume ratio of 1:40 for 12 hours to obtain a solution A, (b) mixing chloroauric acid solution and alcohol solution according to volume ratio of 1:300, to obtain a solution B and the molar concentration of the chloroauric acid solution is 0.01 mol/l, (c) slowly dropping the solution A into the solution B according to volume ratio of 1:5, slowly hydrolyzing for 24 hours, filtering by extraction and separating the obtained sedimentation from liquid after finishing the reaction, transferring the separated sedimentation into muffle furnace, thermal treating at 400 degrees C for 3 hours to obtain titanium dioxide micro-spheres modified by gold; (a) dropping titanic acid isopropyl acetate slowly into glycerol at room temperature according to volume ratio of 1:60 for reaction 12 hours to obtain a solution A, (b) mixing chloroplatinic acid solution and alcohol solution according to volume ratio of 1:300, to obtain a solution B, where the molar concentration of the chloroplatinic acid solution is 0.04 mol/l, (c) slowly dropping the solution A into the solution B according to volume ratio of 1:1, slowly hydrolyzing for 24 hours, filtering by extraction and separating the obtained sedimentation from liquid after finishing the reaction, transferring the separated sedimentation into muffle furnace, thermal treating at 650 degrees C for 3 hours to obtain titanium dioxide micro-spheres modified by platinum; (a) dropping titanic acid tetraethyl into isopropanol slowly at room temperature according to volume ratio of 1:80 for reaction 12 hours to obtain a solution A, (b) mixing chloroauric acid solution and acetone solution according to volume ratio of 1:100, to obtain a solution B and the molar concentration of the chloroauric acid solution is 0.03 mol/l, (c) slowly dropping the solution A into the solution B according to volume ratio of 1:3, slowly hydrolyzing for 24 hours, filtering by extraction and separating the obtained sedimentation from liquid after finishing the reaction, transferring the separated sedimentation into muffle furnace, thermal treating at 550 degrees C for 3 hours to obtain titanium dioxide micro-spheres modified by gold; or (a) dropping titanic acid N-butyl acetate into n-butyl alcohol slowly at room temperature according to volume ratio of 1:40 for reaction 12 hours to obtain a solution A, (b) mixing chloroplatinic acid solution and diethyl ether solution according to volume ratio of 1:200, to obtain a solution B and the molar concentration of the chloroplatinic acid solution is 0.03 mol/l, (c) slowly dropping the solution A into the solution B according to volume ratio of 1:3, slowly hydrolyzing for 24 hours, filtering by extraction and separating the obtained sedimentation from liquid after finishing the reaction, transferring the separated sedimentation into muffle furnace, thermal treating at 650 degrees C for 3 hours to obtain titanium dioxide micro-spheres modified by platinum.