Double‐Shelled Porous g‐C<sub>3</sub>N<sub>4</sub> Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes
Jing Tang, Rongping Xu, Guozhe Sui, Dongxuan Guo, Zhenlong Zhao, Shanshan Fu, Xue Yang, Yue Li, Jinlong Li
Abstract
Abstract Graphite phased carbon nitride (g‐C 3 N 4 ) has attracted extensive attention attributed to its non‐toxic nature, remarkable physical–chemical stability, and visible light response properties. Nevertheless, the pristine g‐C 3 N 4 suffers from the rapid photogenerated carrier recombination and unfavorable specific surface area, which greatly limit its catalytic performance. Herein, 0D/3D Cu‐FeOOH/TCN composites are constructed as photo‐Fenton catalysts by assembling amorphous Cu‐FeOOH clusters on 3D double‐shelled porous tubular g‐C 3 N 4 (TCN) fabricated through one‐step calcination. Combined density functional theory (DFT) calculations, the synergistic effect between Cu and Fe species could facilitate the adsorption and activation of H 2 O 2 , and the separation and transfer of photogenerated charges effectively. Thus, Cu‐FeOOH/TCN composites acquire a high removal efficiency of 97.8%, the mineralization rate of 85.5% and a first‐order rate constant k = 0.0507 min −1 for methyl orange (MO) (40 mg L −1 ) in photo‐Fenton reaction system, which is nearly 10 times and 21 times higher than those of FeOOH/TCN ( k = 0.0047 min −1 ) and TCN ( k = 0.0024 min −1 ), respectively, indicating its universal applicability and desirable cyclic stability. Overall, this work furnishes a novel strategy for developing heterogeneous photo‐Fenton catalysts based on g‐C 3 N 4 nanotubes for practical wastewater treatment.