TiO2-loaded adsorbents, such as activated carbon, zeolite, bentonite, and diatomite, were prepared. And the photocatalytic degradation of benzene in gas phase was studied then. The efficiency of photocatalysis was compared with that of naked TiO2. The experiment results indicated that the suitable adsorbent supports make a high concentration environment of organic substances of target around the loaded TiO2 by adsorption, and the rate of photooxidation is enhanced as a consequence.