Synthesis of layered zinc-aluminium double hydroxides modified with metal ions as photocatalysts with enhanced sorption properties

Abstract

In the article the process of Fe, Co, Ni and Cu hydroxides modified nanoparticles of layered double hydroxides (LDH) based on Zn and Al (Zn-Al LDH) was successfully presented. The precipitation method allowed to obtain nanoparticles of high crystallinity with lateral dimensions below 100 nm and thickness below 20 nm. The photocatalytic activity of the modified LDH in the degradation process of quinoline yellow was over 99%, while for the unmodified LDH the efficiency was only 30%. The study confirmed that modification of LDH with divalent ions had a significant effect on both photocatalytic and sorption properties. Furthermore, the study also investigated the effect of the nature of the type of light on the photodegradation efficiency.

Boosted Photocatalytic Activity of Zn/Al‐Based Layered Double Hydroxides Through Cobalt Incorporation for Phenol Degradation

“…[22] The band at 671 cm À 1 is attributed to [MÀ OÀ M] stretching, while the signal at 550 cm À 1 is assigned to [MÀ OH] stretching. [23] The chemical binding status of the Zn/Al and Zn/AlÀ Co(0.3) materials was analyzed by XPS. Figure S1 shows the survey scan spectra of the synthesized catalysts.…”

“…Additionally, absorption bands below 700 cm −1 are associated with lattice vibrations involving metal‐oxygen stretching modes [22] . The band at 671 cm −1 is attributed to [M−O−M] stretching, while the signal at 550 cm −1 is assigned to [M−OH] stretching [23] …”