A Highly Efficient Composite Catalyst Constructed From NH2-MIL-125(Ti) and Reduced Graphene Oxide for CO2 Photoreduction

Abstract

Substantial consumption of fossil fuels causes an increase in CO2 emissions and intensifies global pollution problems, such as the greenhouse effect. Recently, a new type of ultra-low-density porous material, metal-organic frameworks (MOFs), has been developed for the photocatalytic conversion of CO2. Herein, a composite photocatalytic catalyst based on NH2-MIL-125(Ti) and reduced graphene oxide (rGO@NH2-MIL-125) was fabricated through a facile “one-pot” process. The acquired materials were characterized to obtain their structures, morphologies, and optical information. The experimental results showed that methyl formate (MF) was the predominant reaction product, and rGO@NH2-MIL-125 exhibited the highest yield of 1,116 μmol·g−1·h−1, more than twice that of pure MIL-125. The high photoactivity of rGO@NH2-MIL-125 can be ascribed to the effective spatial separation and transfer of photoinduced carriers, largely due to the synergistic effect of amino functionality and rGO incorporation. rGO@NH2-MIL-125 also displayed acceptable repeatability in cyclic runs for CO2 reduction.

Synthesis of porous titanium heterostructure MOF for the photocatalytic degradation of amoxicillin from wastewater

“…1. The XRD pattern of as-synthesized MIL-125 and NH 2 -MIL-125 has good similarities with the previous reports con rming the crystallinity and the framework structure of MOFs [14,15]. MIL-125 and NH 2 -MIL-125 show strong diffraction peaks at 6.8, 9.5, and 11.6° indexed as (011), (020), and (121) planes respectively.…”

Construction of MIL-125-NH2@BiVO4 Composites for Efficient Photocatalytic Dye Degradation

“…This observation is consistent with the conclusion obtained from XRD analysis. Seen from the spectrum of the TN sample, , the bands at 1300–1600 cm –1 are attributed to the stretching vibrations of the carboxylate group. C–N and N–H bonds at 1259 and 1626 cm –1 are correlated with the linkers in the framework of MIL-125-NH 2 .…”

Tailoring of Nanostructured ZnO-Fe3O4/TiO2 Composite Derived from MIL 125(Ti) for Efficient Photocatalytic Removal of Reactive Blue 21 from Aqueous Solutions

“…4. In the as-synthesized MIL 125(Ti), the diffraction peak was found at 2θ= 10.1°, 12.06°, 15.8°, 16.96°, 18.41°, 19.96°, and 23.11° which could be ascribed to the reflection from the ( 200), ( 211),( 103), ( 222), ( 312), (400), and ( 204) planes (Zhao et al 2019).…”