Scalable and cost-effective fabrication of threedimensional (3D) boron carbon nitride (BCN) microspheres was first demonstrated by hydrothermal and annealing methods. In particular, the specific surface area of 3D-BCN-4 reached 1390.12 m 2 g −1 and had a high hierarchical pore structure. An all-printed solid-state flexible microsupercapacitor (MSC) based on 3D-BCN-4 microspheres as an electrode material was fabricated for the first time by a screen printing method, which also provided efficacious properties. The single MSC areal capacitance reached 41.6 mF cm −2 . Furthermore, the remarkable mechanical flexibility was also achieved for the device with evidence that no obvious capacitance loss occurred even upon bending to 180°, and the device had a 93.3% capacitance retention after 1000 cycles. In addition, the maximum energy density reached 0.00832 mW h cm −2 , and the highest power density was 2 mW cm −2 . These results show the synthesis of 3D-BCN by a facile and effective method with excellent electrochemical performance, which should provide a promising direction to wearable energy storage devices.
In this work, BN/g‐C3N4 composites were prepared by hydrothermal reaction. The BN/g‐C3N4 composites were successfully characterized by FTIR spectra, XRD, SEM, HRTEM, UV/Vis DRS, N2 adsorption–desorption isotherms and BET. The photocatalytic activities of the as‐prepared catalysts were evaluated by the degradation of different organic pollutants, such as Acid Red (AR), Rhodamine B (RhB), Congo Red (CR), Methyl Orange (MO), Methyl Red (MR), and Phenol. The best result showed that the 40 wt% BN was added to g‐C3N4 (BN/g‐C3N4‐4) achieved up to 99% decomposition of AR within 90 min under visible‐light irradiation. The kinetics of BN/g‐C3N4 ‐4 for degradation of AR was almost six times than that of pure g‐C3N4. Finally, the degradation processes of different pollutants and the photocatalytic mechanism had been explained concretely.
Modified MXene (Ti3C2Tx) is attractive as a flexible electrode for wearable energy storage devices. In this work, a convenient and effective method was proposed to change the conventional 2D...
In this work, the preparation, characterization and removal capability of hierarchically porous carbonaceous sponges and their g-C 3 N 4 /CS composites were described. Possessing a hierarchically porous structure and extremely large surface areas, g-C 3 N 4 /CS composites are demonstrated to have advantages in adsorption and photocatalytic activities. The adsorption and photocatalytic activities of the as-prepared catalysts were evaluated by the degradation of RhB, MO, and phenol. The best results showed that 97% decomposition of RhB was obtained by using g-C 3 N 4 /CS-60 composites within 20 min at 25°C under visible light irradiation. Furthermore, the g-C 3 N 4 / CS-60 composites showed remarkable regeneration stability, which maintains high photocatalytic activity after the samples are saturated. Additionally, the degradation mechanisms of RhB and the photocatalytic mechanism are explained in this paper.
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