Li Yunfeng, Fang Lin, Jin Renxi, Yang Yang, Fang Xu, Xing Yan, Song Shuyan
Department of Chemistry, Northeast Normal University, Changchun, 130024, China.
Nanoscale. 2015 Jan 14;7(2):758-64. doi: 10.1039/c4nr06565d.
As a potential visible-light photocatalyst, the photocatalytic performance of the bulk g-C3N4 synthesized by heating melamine (denote as g-C3N4-M) is limited due to its low specific surface area and the high recombination rate of the photo-induced electron-hole pair. In this paper, a novel g-C3N4-M nanosheet (g-C3N4-MN) obtained from the bulk g-C3N4-M through a thermal exploitation method is employed as an excellent substrate and different amounts of Ag2CO3 nanoparticles are loaded at room temperature. The phase and chemical structure, electronic and optical properties of the Ag2CO3/g-C3N4-MN heterostructures are well-characterized. The photocatalytic activities of the as-prepared Ag2CO3/g-C3N4-MN are evaluated by the degradation of methyl orange (MO) and rhodamine B (RhB) pollutants under visible light irradiation. More importantly, the Ag2CO3/g-C3N4-MN heterostructure has been proved to be an excellent photocatalytic system with an enhanced specific surface area and charge separation rate compared with those of the Ag2CO3/g-C3N4-M system.
作为一种潜在的可见光光催化剂，通过加热三聚氰胺合成的块状g-C3N4（记为g-C3N4-M）的光催化性能受到限制，这是由于其低比表面积和光生电子-空穴对的高复合率。本文中，通过热剥离法从块状g-C3N4-M获得的新型g-C3N4-M纳米片（g-C3N4-MN）被用作优良的基底，并在室温下负载不同量的Ag2CO3纳米颗粒。对Ag2CO3/g-C3N4-MN异质结构的相和化学结构、电子和光学性质进行了充分表征。通过在可见光照射下降解甲基橙（MO）和罗丹明B（RhB）污染物来评估所制备的Ag2CO3/g-C3N4-MN的光催化活性。更重要的是，与Ag2CO3/g-C3N4-M体系相比，Ag2CO3/g-C3N4-MN异质结构已被证明是一种具有更高比表面积和电荷分离率的优良光催化体系。
