Ren Haitao, Ge Lin, Guo Qian, Li Lu, Hu Guangkuo, Li Jiangong
Institute of Materials Science and Engineering, Lanzhou University Lanzhou 730000 China
RSC Adv. 2018 Jun 4;8(36):20157-20165. doi: 10.1039/c8ra02103a. eCollection 2018 May 30.
Carbon quantum dots were prepared by a simple chemical process using activated carbon as carbon source. The as-prepared carbon quantum dots are fine with a narrow size distribution and show excellent hydrophilicity. The carbon quantum dots were combined with SrTiO nanoparticles through a simple impregnation process to obtain a carbon quantum dots/SrTiO nanocomposite. The photocatalytic reaction rate of carbon quantum dots/SrTiO nanocomposite is about 5.5 times as large as that of pure SrTiO in the degradation of rhodamine B under sunlight irradiation. The enhanced performance in the degradation of rhodamine B may be attributed to the interfacial transfer of photogenerated electrons from SrTiO to carbon quantum dots, leading to effective charge separation in SrTiO. Carbon quantum dots show potential applications in high-efficiency photocatalyst design.
以活性炭为碳源，通过简单的化学过程制备了碳量子点。所制备的碳量子点粒度细小，尺寸分布窄，表现出优异的亲水性。通过简单的浸渍过程将碳量子点与SrTiO纳米颗粒结合，得到碳量子点/SrTiO纳米复合材料。在阳光照射下，碳量子点/SrTiO纳米复合材料在罗丹明B降解中的光催化反应速率约为纯SrTiO的5.5倍。罗丹明B降解性能的增强可能归因于光生电子从SrTiO到碳量子点的界面转移，从而导致SrTiO中有效的电荷分离。碳量子点在高效光催化剂设计中显示出潜在的应用。
