1. The First High School of Qinhuangdao, Qinhuangdao 066006, China;
2. College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
Abstract This paper analyzed the principle of photocatalytic reaction, the crystal structure of photocatalyst TiO2 and main problems of photocatalytic technology. These problems were as follows:the low quantum efficiency, the narrow spectral response range, the difficulty of photocatalyst separation and recovery, the low transmittance of high concentration wastewater, and the photocatalyst deactivation. The research status of photocatalyst was briefly introduced also.
