Modulation of release behaviors of methylene blue from degradable silica-methylene blue@octacalcium phosphate powders with different shell structures

- The coating of OCP on silica-MB was achieved by a facile sol-gel method.
- The release behavior of MB from samples was sensitive with the pH value.
- The shell structure modulated the release behavior of MB from silica-MB@OCP.
- The structure-destruction of silica-MB was promoted after the deposition of OCP.