Cerium-doped β-Ni(OH)₂ hexagon nanosheets: an effective photocatalyst for the degradation of the emerging water pollutant, naproxen

Abstract

Nickel hydroxide β-Ni(OH) hexagonal nanosheets were synthetized via a hydrothermal exfoliation process. The practical microwave-assisted hydrothermal method facilitated obtaining layered nickel 3D nanoplates with cerium functionalization in 5 h. The as-produced nanostructures were characterized by XRD, XPS, FESEM, FTIR, PL, UV-vis, and BET techniques. The hydroxilated structures are nano-thick hexagonal plates with sides 28 nm in length and an average thickness of 5 nm. UV and PL irradiation was used to study the photoactive properties in the degradation of a pharmaceutical emerging pollutant, naproxen. UV-vis spectroscopy and high-performance liquid chromatography monitoring indicated that the Ni(OH)-Ce nanostructures are an effective photocatalyst for naproxen degradation, including 40% mineralization of this highly recalcitrant drug. The photocatalyst showed stability for two consecutive cycles, preserving its photoactive and structural characteristics. Ce-doped nanoplates and surface functionalized Ce act as charge separators and scavenging agents for the enhanced photodegradation of naproxen.

Fe‐Doped Nickel Hydroxide/Nickel Oxyhydroxide Function as an Efficient Catalyst for the Oxygen Evolution Reaction

“…The peaks are shifted to lower angles in the case of Fe 0.06 Ni 0.94 (OH) 2 /NiOOH compared to Ni(OH) 2 /NiOOH (Figure aii) which suggest the successful incorporation of dopant ions raise the tensile strain in the host matrix of Ni(OH) 2 /NiOOH. The reported literature supports the observed phenomena . XRD analysis indicates the enhancement of Ni 3+ in Ni(OH) 2 /NiOOH system after successful ‘Fe’ doping.…”

“…The reported literature supports the observed phenomena. [38,39] XRD analysis indicates the enhancement of Ni 3 + in Ni(OH) 2 /NiOOH system after successful 'Fe' doping.…”

Photoluminescence studies of Ce3+ ion‐doped BiPO4 phosphor and its photocatalytic activity

“…It has also been reported that BiPO 4 has greater activity on the degradation of some organic dyes, phenol, benzene than the P25 under UV light irradiation 15–17 . Moreover doping of Ce 3+ ion into semiconductor leading to increase its surface area and also enhances the electron‐hole charge separation which higher its photocatalytic activity 18,19 . Therefore, the present study is focused on the investigation of photoluminescence and photocatalytic properties of Ce 3+ ‐doped BiPO 4 prepared by co‐precipitation method using ethylene glycol as reaction medium.…”