Hollow or Yolk–Shell-Type Photocatalyst

The emerging hollow and yolk–shell-type photocatalyst composites show attractive photocatalytic performance by multifunction assembly, accelerating the separation of photocatalytic induced hole–electron and enhancing the light absorption efficiency. Meanwhile, more active sites can be formed due to the exposed inner surface of the shell. This chapter focuses on providing a state-of-the-art introduction about the synthesis routes and photocatalytic application of this kind of composites.