Photocatalytic active silver organic framework: Ag(I)‐MOF and its hybrids with silver cyanamide

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 (Ag2NCN). Two opposite in situ synthesis routes were adopted, which are hydrothermally producing Ag‐MOF in the presence of Ag2NCN (route A) or precipitating Ag2NCN in the existence of Ag‐MOF (route B), and the mass ratio of Ag2NCN 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 Ag2NCN, 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.

Trace to the Source: Self‐Tuning of MOF Photocatalysts

“…(i, j) Adapted with permission. [310] Copyright 2017, Wiley-VCH. k) SEM, enlarged SEM, TEM images, and the corresponding 3D geometry models of as-synthesized NH 2 -MIL-125(Ti) obtained under different concentrations of CTAB: 0, 1, 2, 3, and 4 mm, from left to right; l) Surface structures of the {001}, {110}, {110} and {111} facets for NH2-MIL-125(Ti); m) photocurrent responses; n) EIS Nyquist plots for NH 2 -MIL-125(Ti) with different morphologies.…”

“…their properties for photodegradation of methyl orange (MO) (Figure 17i,j). [310] In addition, Guo's group synthesized T001-1, T001-2, T110, T100, and T111 containing different facets by controlling the amount of capping agent CTAB addition. [311] Theoretical calculations show that the surface energy of {110} is higher than that of {001}, {100}, and {111} at 1.18 Jm −2 , which is probably due to the exposure of more metal clusters as active catalytic sites in this facet.…”

A new Ag‐based photocatalyst for efficient degradation of antibiotic nitrofurantoin

“…34 Scientists have explored the photocatalytic degradation of organic pollutants by some Ag-based CPs. 35 Interestingly, studies on photocatalysis of Ag-based CPs are significantly less than those of other CPs, and only a few reports have shown that Ag-based catalysts have a good visible light response and potential photocatalytic activity. [36][37][38] In recent years, zero-dimensional (0D) materials have received attention because of their interesting geometry and appropriate connection with special chemical properties.…”

Morphology control in the synthesis of [Mo3S13]2−/Co-MOF-74 composite catalysts and their application in the oxygen evolution reaction

“…14,15 In the process of the design, synthesis, characterization, and application, it is found that the size and morphology of MOFs often greatly affect their functionalities and catalytic activities. 16,17 For example, Zhu et al 18 successfully controlled various morphologies and sizes of Co-MOF-74 via changing the amount of water in the system of mixed solvent and the sample with a flower-like morphology possesses the most excellent catalytic performance for toluene oxidation. Ma's group controlled the temperature of a solvothermal reaction to synthesize different morphologies of Ni-MOFs.…”