A new high-yield fabrication approach for porous red phosphorus nanosheets using N-methyl-2-pyrrolidone with multiple photocatalytic reduction applications. Issue 14 (1st October 2020)

• Record Type: Journal Article
• Authors: Zhang, Meili; Liu, Jiaqing; Liu, Lin; Sun, Kailong; Liang, Xiao; Wan, Jun; Fu, Feng
• Is Part Of: Ceramics international. Volume 46:Issue 14(2020)
• Page Start: 23165
• Page End: 23172
• Publication Date: 2020-10-01
• Subjects: Red phosphorus -- Porous nanosheets -- Photocatalytic hydrogen evolution -- Nitrogen fixation -- Cr(VI) removal; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.06.096
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, a facile and effective solvothermal treatment-coupled ultrasonic exfoliation strategy was developed to prepare porous red phosphorus nanosheets (RP PNS) with a high yield output. N-methyl-2-pyrrolidone (NMP) was chosen as the dispersant agent to avoid the waste of raw RP materials and to enhance the fragmentation efficiency during the size-reduction process. The BET-specific surface area can reach 84.37 m 2 /g, which is the highest value to date. Additionally, the obtained RP PNS sample exhibits an excellent photocatalytic hydrogen evolution rate of 1169.4 μmol h -1 g -1, a nitrogen fixation rate of 450.4 μmol h -1 g -1, and a 94.3% removal efficiency of 120 mg/L Cr(VI), which are much higher values than those of block RP and micro RP. The enhanced photocatalytic performance can be attributed to the RP PNS sample having a larger specific surface area, more effective mass transfer through the interconnected porous nanosheets, and a higher charge transfer efficiency and carrier density.