Construction and Activity of an All‐Organic Heterojunction Photocatalyst Based on Melem and Pyromellitic Dianhydride. Issue 12 (29th April 2022)

• Record Type: Journal Article
• Authors: Li, Yuxin; Jiang, Zeyu; Dong, Guohui; Ho, Wingkei
• Is Part Of: ChemSusChem. Volume 15:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-04-29
• Subjects: carbon nitride -- heterojunctions -- imides -- photocatalysis -- pollution abatement; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202200477
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: The separation efficiency of photogenerated carriers in the g‐C3 N4 system could be improved by the construction of all‐organic heterojunctions. However, g‐C3 N4 has a large π–π conjugated plane that induces a low number of amino groups (−NH2 ), which are the sites of the heterojunction reaction with organic molecules. In this case, few heterojunction knots can be constructed, and the enhancement effect of the heterojunction cannot be fully displayed. In this study, an all‐organic heterojunction with PMDA is constructed with melem instead of g‐C3 N4 . Although the photocatalytic activity of melem is far below that of g‐C3 N4, the photocatalytic activity of PI (the all‐organic heterojunction constructed with melem) is considerably higher than that of CP (the all‐organic heterojunction constructed with g‐C3 N4 ). This result is attributed to melem that has more –NH2 groups to form more heterojunction knots, which can enable the effective transfer and separation of electron‐hole pairs. These new findings may shed light on the design of all‐organic heterojunction photocatalysts. Abstract : If life gives you melem… Melem is used instead of g‐C3 N4 to construct an all‐organic heterojunction with pyromellitic dianhydride. The photocatalytic NO removal activity of the all‐organic heterojunction constructed with melem is considerably higher than that constructed with g‐C3 N4 . This is because melem has more −NH2 to form more heterojunction knots, which enable the effective transfer and separation of electron‐hole pairs.