Preparation and enhanced visible light photocatalytic activity of novel g-C3N4 nanosheets loaded with Ag2CO3 nanoparticles
Preparation and enhanced visible light photocatalytic activity of novel g-C3N4 nanosheets loaded with Ag2CO3 nanoparticles
复制标题
负载Ag2CO3纳米颗粒的新型g-C3N4纳米片的制备及其增强可见光催化活性
DOI：
10.1039/c4nr06565d
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发表时间：
2015-01-01
期刊：
影响因子：
6.7
通讯作者：
Song, Shuyan
中科院分区：
文献类型：
--
作者：
Li, Yunfeng;Fang, Lin;Song, Shuyan
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（表示为g-C3N4-M）由于其低比表面积和高光致电子-空穴对复合率，其光催化性能受到限制。本文采用热开发方法从块状 g-C3N4-M 中获得的新型 g-C3N4-M 纳米片（g-C3N4-MN）作为优异的基底，并在室温下负载不同量的 Ag2CO3 纳米颗粒。 Ag2CO3/g-C3N4-MN 异质结构的物相和化学结构、电子和光学性质得到了很好的表征。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，Ag2CO3/g-C3N4-MN异质结构已被证明是一种优异的光催化体系，与Ag2CO3/g-C3N4-M体系相比，其比表面积和电荷分离率有所提高。
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.