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Graphite phased carbon nitride (g‐C3N4) has attracted extensive attention attributed to its non‐toxic nature, remarkable physical–chemical stability, and visible light response properties. Nevertheless, the pristine g‐C3N4 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‐C3N4 (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 H2O2, 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‐C3N4 nanotubes for practical wastewater treatment.

Vacancy engineering and heteroatoms doping of transition metal-based electrocatalysts have attracted extensive attention. Herein, in this work, sulfur vacancies modulated nickel-doped Co4S3 hollow nanocubes/nitrogen-doped V2CTx MXene nanosheet (abbreviated as Ni-Co4S3...

A three-dimensional (3D) hollow CoWO 4 composite grown on Ni-foam (3DÀ H CoWO 4 /NF) based on a flower-like metal-organic framework (MOF) is designed by utilizing a facile dipping and hydrothermal approach. The 3DÀ H CoWO 4 /NF not only possesses large specific areas and rich active sites, but also accommodates volume expansion/ contraction during charge/discharge processes. In addition, the unique structure facilitates fast electron/ion transport of 3DÀ H CoWO 4 /NF. Meanwhile, a series of characterization measurements demonstrate the appropriate morphology and excellent electrochemical performance of the material. The 3DÀ H CoWO 4 /NF possesses a high specific capacitance of 1395 F g À 1 , an excellent cycle stability with 89% retention after 3000 cycles and superior rate property. Furthermore, the 3DÀ H CoWO 4 /NF can be used as a cathode to configurate an asymmetric supercapacitor (ASC), and 3DÀ H CoWO 4 /NF//AC shows a good energy density (29.0 W h kg À 1 ). This work provides a facile method for the preparation of 3D-hollow electrode materials with high electrochemical capability for advanced energy storage devices. cell (F g À 1 ) is the specific capacitance of the asymmetric supercapacitor, ΔV (V) stands for the potential change. E is the energy density (Wh kg À 1 ), and then t denotes the discharge time (s).