Abstract: Disclosed herein is an antireflective photocatalyst composition including a titanium dioxide-based photocatalyst, a binder, water, and alcohol, and a substrate using the composition. The antireflective photocatalyst composition is advantageous in that, when it is applied to a glass substrate, such as a glass antireflective film for a solar cell or a glass illuminator, it can prevent incident light energy from scattering and improve optical transmissivity, and in that it decomposes pollutants due to the dual action of harmful gas decomposition and self-purification, which are specific characteristics of a photocatalyst.

Abstract: An IC card for the operators of vehicles in traffic, with which a traffic-related business conducting apparatus is used, and a method using the same are provided. The card includes a data memory for recording and reading out data and a controller for reading out and recording the data stored the data memory. The data can selectively be input or output to/from an external device, so as to process the traffic-related business on-line or off-line with a central processing unit. Police business is enhanced in view of efficiency and security and drivers are provided with greater convenience.