As the rapid development of industrial economy, massive consumption of fossil energy leads to increasingly serious environmental pollution. Thus, it is highly obliged to develop green, efficient and robust technologies for fuel production and pollution remediation. Semiconductor-based photocatalysis could realize the production of fuel chemicals, selective transformation/degradation of organic pollutants and even inactivation of microorganisms by using the solar-to-chemical energy conversion hence possesses scientific significance and great application potential. Besides, multidisciplinarily involving semiconductor physics, catalysis and surface science,photocatalysis has become one of the most attractive and pioneering research fields all over the world.