Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China.
J Hazard Mater. 2018 Jul 5;353:80-88. doi: 10.1016/j.jhazmat.2018.03.044. Epub 2018 Mar 31.
A novel mesoporous TiO@g-CN hollow core@shell heterojunction photocatalyst was engineered for the first time by in situ calcining and growing of cyanamide (CY) on the surface of TiO. The HTCN-1 possesses good structure and performance when the addition amount of CY is 1 mL. HTCN-1 shows high photocatalytic activity toward congo red (CR), rhodamine B (RhB), phenol and ciprofloxacin (CIP) with degradation efficiencies of 97%, 100%, 73%, and 74%, respectively. HTCN-1 also displays high photocatalytic activity for H generation at rate of 7.9 μmol h. A possible charger transfer mechanism and photocatalytic degradation mechanism of HTCN-1 are proposed basing on the experiment results. The enhanced photocatalytic activity may be attributed to the higher charge transfer efficiency of photogenerated electron-hole (e-h) pairs caused by close contacts, a larger interfacial area, and the higher barrier for conduction bending. What's more, HTCN-1 possesses relatively high stability during the entire photoreaction process. Given the unique spatial structure and superior photocatalytic characteristics of the HTCN-1, there is great potential for applications in water treatment and H generation.
一种新型介孔 TiO@g-CN 中空核壳异质结光催化剂被首次设计出来，通过在 TiO 表面原位煅烧和生长氰胺（CY）实现。当 CY 的添加量为 1 mL 时，HTCN-1 具有良好的结构和性能。HTCN-1 对刚果红（CR）、罗丹明 B（RhB）、苯酚和环丙沙星（CIP）表现出很高的光催化活性，降解效率分别达到 97%、100%、73%和 74%。HTCN-1 对 H 的光催化生成速率也达到了 7.9 μmol h。基于实验结果，提出了 HTCN-1 的可能电荷转移机制和光催化降解机制。增强的光催化活性可能归因于光生电子空穴（e-h）对的电荷转移效率更高，这是由于紧密接触、更大的界面面积和传导弯曲的更高势垒所致。此外，HTCN-1 在整个光反应过程中具有相对较高的稳定性。鉴于 HTCN-1 的独特空间结构和优越的光催化特性，它在水处理和 H 生成方面具有很大的应用潜力。
