TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The concentration of the CNTs is 0.3-10 wt.% of the CNT-mesoporous silica composite. The concentration of the surfactant is 1000-100000 or 3000-300000 parts by weight based on 100 parts by weight of the CNTs. The silica source consists of tetraethoxysilane, tetramethoxysilane or sodium silicate. The CNTs are single-walled CNTs (SWNT), multi-walled CNTs (MWNTs), or carbon nanofibers (CNFs). The acid is nitric acid, hydrochloric acid, sulfuric acid, or acetic acid. The CNT-mesoporous silica composite comprises CNTs and mesoporous silica. The carrier is water or an organic solvent. The mesopores of the CNT-mesoporous carbon composite have an average diameter of 2-10 nm. The CNT mesoporous carbon composite has a specific surface area of 800-3500 m2/g. The concentration of the metal catalyst particles is 40-80 wt.% of the supported catalyst. The CNT mesoporous carbon composite comprises CNTs and mesoporous carbon, where the concentration of the CNTs is 0.6-20 wt.% of the CNT-mesoporous carbon composite. The CNT mesoporous carbon composite comprises CNTs and mesoporous silica. Preferred Process: The heating is performed at 80-160 degrees C for 30-120 minutes. The separating is performed by filtration or centrifuging. The calcining is performed at 300-550 degrees C for 3-15 hours. The pH is -0.7 to -7. The acid is added while preparing the carbon precursor sol. The polymerizing is performed by heat-treatment comprising heating the carbon precursor sol penetrated into the CNT-mesoporous silica composite at 50-250 degrees C. The heat-treatment comprises a first heat-treatment of the carbon precursor sol penetrated into the CNT-mesoporous silica composite at 5-150 degrees C and a second heat-treatment of the carbon precursor sol penetrated into the CNT-mesoporous silica composite at 150-250 degrees C, in sequence. The polymerizing is performed by exposing the carbon precursor sol penetrated into the CNT-mesoporous silica composite to UV irradiation. The impregnating and the polymerizing are repeated at least once in sequence prior to the thermally decomposing. The thermally decomposing comprises heating the carbon precursor at 600-1400 degrees C. The solution capable of dissolving silica is aqueous hydrofluoric acid and/or aqueous sodium hydroxide. The CNT-mesoporous silica composite is prepared by dissolving a surfactant in water and adding CNTs to form a mixture, adding a silica source and water to the mixture to form a solution, adding an acid to the solution to adjust the pH of the solution, stirring the solution, heating the solution to obtain powders, separating the powders from the solution, washing the powders at least one time and calcining the powders. The polymerizable carbon-containing compound is a carbohydrate or monomer. EXAMPLE - None given.