Hollow PCPP microspheres as an adsorbent could be facilely synthesized.
The adsorbent owns numerous electron-rich N and P atoms and hydroxyl groups.
The adsorbent exhibited an effective and selective adsorption behavior.
The pseudo-second-order model could be better to describe the adsorption of MB.
The MB adsorption onto Hollow PCPP microspheres was endothermic and spontaneous.