Bi-doped graphitic carbon nitride nanotubes boost the photocatalytic degradation of Rhodamine B

Abstract

Polymeric carbon nitride (PCN) is an emerging metal-free photocatalysts with high stability but is plagued by low photocatalytic efficiency due to the rapid charge carrier recombination behavior. Herein, Bi doped...

Strategies for preparing TiO2/CuS nanocomposites with cauliflower-like protrusions for photocatalytic water purification

“…During the irradiation period, 4 mL RhB aqueous solution was extracted every 1.5 h and measured with a UV-vis spectrophotometer by recording the absorbance at 554 nm, which is the characteristic absorption peak of RhB aqueous solution. 27 The absorbance of a solution is proportional to its concentration, and the degradation efficiency of RhB aqueous solution can be calculated using the following formula:Degradation efficiency (%) = 1 − ( C – C 0 )/ C 0 × 100%where C represents the concentration at different times and C 0 denotes the initial concentration of the solution.…”

Photocatalytic degradation of rhodamine-B by visible light assisted peroxymonosulfate activation using the Z-scheme MIL-100(Fe)/Bi2S3 composite: a combined experimental and theoretical approach

“…For example, composites with 5 wt% and 10 wt% Bi 2 S 3 loading (MIL-BS(5) and MIL-BS(10)) show 85% and 97% RhB degradation capability, after 30 min treatment under the influence of PMS and visible light. With the further increase of Bi 2 S 3 loading (15-25 wt%), RhB degradation decreases and the composite MIL-BS (20) shows 91% RhB degradation. At lower loading of Bi 2 S 3 in the composite, adequate active sites are absent for activation of ionized PMS and RhB molecules.…”

“…7,8 In this regard, development of visible light responsive photocatalytic composites can be an attractive alternative to eliminate the high energy demand. Different types of semiconductor materials and composites, like composite metal oxides, 9–13 metal carbides, 14,15 metal sulfides, 8,16 graphene derivatives, 17 graphitic carbon nitride, 18–21 metal organic frameworks (MOFs), 22–24 MXene, 25 etc. , have been employed as highly effective photocatalysts in the removal of various contaminants in water.…”

“…7,8 In this regard, development of visible light responsive photocatalytic composites can be an attractive alternative to eliminate the high energy demand. Different types of semiconductor materials and composites, like composite metal oxides, [9][10][11][12][13] metal carbides, 14,15 metal sulfides, 8,16 graphene derivatives, 17 graphitic carbon nitride, [18][19][20][21] metal organic frameworks (MOFs), [22][23][24] MXene, 25 etc., have been employed as highly effective photocatalysts in the removal of various contaminants in water. To increase the harvesting of visible light irradiation, lowering the excited e À /h + recombination, as well as introducing more reactive sites for photocatalytic reactions, formation of heterojunctions between different visible light responsive semiconductors is a viable option.…”

Enhanced visible-light-driven RhB removal with a Mo–Ni bimetallic sulfide/g-C3N4 nanosheet Schottky junction

“…Graphite carbon nitride (g-C 3 N 4 ), as a well-known efficient visible-light-driven (VLD) photocatalyst, exhibits prominent application prospects in environmental purification and remediation, especially in the degradation of organic pollutants. [1][2][3] Notably, g-C 3 N 4 is set apart from various VLD photocatalysts owing to its low cost, high chemical stability, and suitable potential structure. [4][5][6] Unfortunately, bulk g-C 3 N 4 usually suffers problems of insufficient active sites and a high recombination rate of photogenerated electron-hole pairs, which greatly limits its development and practical application.…”