Utilizing solar energy to drive the semiconductor photocatalysis for production of renewable source like hydrogen is an ideal strategy to solve the growing world energy crisis and environment pollution. Given the high photoactivity and chemical inertness, Semiconductor has been extensively used as an efficient photocatalyst. The book delivered three-dimensional semiconductor sheets on the basis of interwoven nanofibrous networks, which can be readily recycled for the desirable circular application of a potent photocatalyst system.