Exploration of Zr–Metal–Organic Framework as Efficient Photocatalyst for Hydrogen Production

Abstract

The application of metal-organic framework (MOF) in the field of photocatalysis is limited, because of its unstable chemical properties and failure to respond in visible light. Herein, the Pd/MOF catalysts were prepared by impregnation reduction. It is important that we have reasonably constructed the dye-sensitized system of Pd/MOF and successfully extended the application of MOF to the visible range. It exhibited maximal photocatalytic activity (9.43 mmol/g) under visible-light irradiation (λ ≥ 420 nm) with eosin Y as a photo-sensitizer, which was enhanced twice the order of magnitude compared with the pure MOF (0.03 mmol/g). The activation process with an exchangeable guest solvent produced the Zr-MOF with the high surface area and the high stability, which provide a great electronic transmission capacity. The Pd nanoparticles provide an electronic outlet, and the dye broadens the spectral absorption range. The synergistic effect of the various components contributes to the high hydrogen production activity. This work provides a reference for the application of MOF in the field of photocatalysis.

Study of UiO-66 and UiO-66 Modulated with Acetic Acid as the Adsorbent for Eriochrome Black T Dye

“…Characteristic peaks at 547 and 746 cm -1 pointing out the Zr-O stretching and bending modes, respectively. These peaks validated the UiO-66 was successfully synthesized according to the previous study (Jin and Yang, 2017).…”

Ultra‐small and highly dispersed Pd nanoparticles inside the pores of ZIF‐8: Sustainable approach to waste‐minimized Mizoroki–Heck cross‐coupling reaction based on reusable heterogeneous catalyst

“…Because of the electrostatic interaction of negatively charged NHC, functionalized Pd exhibits an excellent environment for stabilizing Pd NPs, and consequently prevents their undesired agglomeration. The obtained Pd NPs show the smallest sizes among metallic nanoparticles stabilized by solid support materials, especially the common MOFs reported to date . On the basis of transmission electron microscopy (TEM) analysis, ultra‐small Pd NPs were well dispersed into the cavities of ZIF‐8.…”

Investigation into the Adsorption of Methylene Blue and Methyl Orange by UiO-66-NO2 Nanoparticles

“…The spectrum displays typical bands responsible for the functional groups C=O (1597 and 1400 cm −1 ), NO 2 (1544 cm −1 ), and Zr-O (484 cm −1 ). Compared to the bands of UiO-66 materials [ 32 ], those of UiO-66-NO 2 material were slightly shifted to the lower wavelength. The reason for this shift is probably due to the negative mesomeric effect resulted by the -NO 2 groups in the structure of UiO-66-NO 2 material, which weakens the corresponding C=O and C=C bonds.…”