Photocatalytic active silver organic framework: Ag(I)‐MOF and its hybrids with silver cyanamide
Huihui Song, Na Wang, Xiatong Shi, Hao Meng, Yide Han, Junbiao Wu, Junli Xu, Yan Xu, Ting Sun, Xia Zhang
Abstract
Probing into the new heterostructure based on metal–organic frameworks (MOFs) and optimizing their photocatalytic efficiency under solar energy irradiation are one of hot topics in extending applications of MOFs in photocatalytic technology. Inspired by the excellent visible‐light responses and photocatalytic activities of inorganic silver salts, in this work, we focused on the construction of hybrid photocatalysts involving Ag‐MOF and silver cyanamide (Ag 2 NCN). Two opposite in situ synthesis routes were adopted, which are hydrothermally producing Ag‐MOF in the presence of Ag 2 NCN (route A) or precipitating Ag 2 NCN in the existence of Ag‐MOF (route B), and the mass ratio of Ag 2 NCN vs. Ag‐MOF was optimized. The morphology and structure character show that the synthetic routes have no obvious influences on the crystal structure, but change the morphology and size of final hybrid photocatalysts. The photocatalytic degradation of Rhodamine B under simulated solar energy has been tested to evaluate the photocatalytic activities for resulting hybrids. Compared to single Ag‐MOF and Ag 2 NCN, the enhanced photocatalytic rates are represented by the hybrids. The electrochemical analyses and the active species trapping experiments were conducted to clarify the photocatalytic mechanism for resulting hybrids. The good recycling photocatalytic results indicate the prospect applications of Ag‐MOF based hybrid photocatalysts.