Acid-treated g-C3N4 with improved photocatalytic performance in the reduction of aqueous Cr(VI) under visible-light

Facile Synthesis of g-C3N4 Nanosheets/ZnO Nanocomposites with Enhanced Photocatalytic Activity in Reduction of Aqueous Chromium(VI) under Visible Light

“…The improved photoreduction activity could be ascribed to the increased absorption in the visible-light range and the enhanced charge separation efficiency at the interface of ZnO and CN nanosheets [16,36]. Furthermore, compared to those reports where better activities were obtained with the use of additional scavengers [11,55,57,59], this method described herein will be highly desirable for environmental remediation due to no additional scavengers in this process.…”

“…However, after some CN nanosheets were incorporated into the ZnO, the reduction rate of the Cr(VI) was increased to 70% and 47% for CN-2/ZnO and CN-10/ZnO, strongly suggesting that the modification with CN nanosheets could greatly enhance the photocatalytic reduction activity of CN/ZnO composites. Compared to other C 3 N 4 - [55,56] and ZnO-based photocatalysts for visible-light-driven Cr(VI) photoreduction [42,57], the CN/ZnO prepared herein showed enhanced photoreduction activity, indicating that modification with CN was effective for improving the photo-activity of ZnO. Furthermore, the lower loading of the CN content for CN-2/ZnO exhibited better activity than that for CN-10/ZnO and this was because the excess CN nanosheets may act as a recombination center, covering the active sites on the surface of ZnO particles and therefore reducing the efficiency of charge separation.…”

A novel “turn‐on” fluorescent sensor for hydrogen peroxide based on oxidized porous g‐C3N4 nanosheets

“…The XRD pattern of CNNs and bulk g‐C 3 N 4 shows the characteristic interplanar stacking peak located at about 27.8°, which attributed to reflection of conjugated aromatic systems (Chen, Hu, Meng, & Fu, ). Compared with the bulk g‐C 3 N 4 via direct pyrolysis of urea, CNNs show only one XRD peak at 27.4°, which suggesting that it had been exfoliated into sheet morphology (Zhang et al, ; Zhang, Zhang, Shi, Cai, & Yang, ). Moreover, there was no other diffraction peak except g‐C 3 N 4 which indicated that the prepared sample is purity.…”

“…It can be seen in (Chen, Hu, Meng, & Fu, 2014). Compared with the bulk g-C 3 N 4 via direct pyrolysis of urea, CNNs show only one XRD peak at 27.4 , which suggesting that it had been exfoliated into sheet morphology Zhang, Zhang, Shi, Cai, & Yang, 2015). Moreover, there was no other diffraction peak except g-C 3 N 4 which indicated that the prepared sample is purity.…”

Photocatalytic remediation of ionic pollutant

“…Carbon nitride containing covalent bonds has been concerned recently as a potential material for photocatalytic reduction. For instance, graphitic C 3 N 4 has been widely used for remediation of toxic ionic pollutant with solar energy due to its high stability and moderate band gap [92,93]. The g-C 3 N 4 can be used as the photocatalyst for removing Cr(VI) and 2,4,6-trichlorophenol (2,4,6-TCP) simultaneously [92].…”