3D‐printed green and low‐cost porous g‐C <sub>3</sub> N <sub>4</sub> /geopolymer components for the removal of methylene blue from wastewater
Xuehui Liu, Siqi Ma, Hualong Yang, Peigang He, Xiaoming Duan, Dechang Jia, Paolo Colombo, Yu Zhou
Abstract
Abstract In this study, we report that geopolymer materials containing different amounts of graphitic carbon nitride (g‐C 3 N 4 ) (C 3 N 4 /GP) can remove methylene blue (MB) using the synergistic effects of adsorption and photodegradation. A geopolymer containing 3 wt% g‐C 3 N 4 (3 wt%C 3 N 4 /GP) had the best MB removal efficiency of 94.62% within 60 min, under visible light. The results showed that geopolymers can act as carriers for g‐C 3 N 4 , and the relative amount of adsorbent and photocatalyst influences the removal of MB. 3 wt%C 3 N 4 /GP was also used for additive manufacturing by using direct ink writing technology. In order to improve the efficiency of MB removal, a pore‐forming agent (K12) was added in the synthesis process to prepare three‐dimensional‐printed porous C 3 N 4 /GP. The results showed that the porous C 3 N 4 /GP was effective in removing MB. This work provides a simple strategy for preparing efficient and green materials for removing organic pollutants.