Facile synthesis of nickel oxide nanoparticles for the degradation of Methylene blue and Rhodamine B dye: a comparative study

Abstract

This work sought to draw a comparison between the photocatalytic proficiency of NiO nanoparticles (NPs) for the degradation of Methylene blue (MB) and Rhodamine B (Rh B) dye. The NiO NPS were synthesized by a facile straightforward chemical route by utilizing NiCl 2 and NaHCO 3 as a precursor. The morphological characteristics of the synthesized NiO NPs have been characterized by using SEM. In addition XRD, FTIR and EDX analysis were also carried out to investigate the crystalline size, functional group and elemental composition of the NPs. The NiO NPs were subsequently used for the photocatalytic degradation of the MB and Rh B in the presence of the visible light irradiation. For evaluation of photocatalytic proficiency, the influence of various key parameters viz. pH of the dye solution, initial dye concentration, Irradiation time and amount of the catalyst were investigated. The extent of photocatalytic degradation of MB and Rh B was found to be 98.7 and 80.33% at pH 2 and 10 respectively. The kinetic investigation of photocatalytic degradation followed a pseudo-first-order rate kinetics for MB and Rh B dye with rate constant 4.6 × 10 −1 and 3.6 × 10 −2 . Additionally, the synthesized NiO NPs was used for the antimicrobial activity against the few gram-positive and gram-negative microorganisms. Highlights• The NiO nanocrystalline semiconducting photocatalyst was successfully synthesized by a facile straightforward chemical route by utilizing NiCl 2 and NaHCO 3 as a precursor. • Novel simple chemical route synthesis at room temperature.• First time report a combine study of photocatalytic degradation of Methylene blue and Rhodamine B dye by using NiO as a photocatalyst. • Also, Antimicrobial study was examined which clearly indicate the biocompatibility of synthesized NiO nanoparticles.

Role of Oxygen Vacancy Ordering and Channel Formation in Tuning Intercalation Pseudocapacitance in Mo Single-Ion-Implanted CeO2–x Nanoflakes

“…The combined XPS, Raman, Pourbaix, and thermodynamic stability diagram data indicate the formation of a hydroxide/oxide layer on the surface of the Ni foam during the soaking in the electrolyte (containing the oxidizing agent NaOH) for 10 min prior to electrodeposition. The formation of this layer was confirmed by additional Fourier transform infrared transmission (FTIR) spectroscopy data (Figure S6) − and energy dispersive spectroscopy (EDS) data (Figure S7) following progressive soaking in the electrolyte for 0, 10, and 20 min. Consequently, the CeO 2– x nanoflakes can form directly on the Ni metal surface, and subsequent annealing in air or N 2 probably would alter this interface.…”

N and Fe doped NiO nanoparticles for enhanced photocatalytic degradation of azo dye methylene blue in the presence of visible light

“…At pH 2, the level of breakdown of MB was discovered to be 98.7%. The findings suggest that the NiO NPs have good photocatalytic activity for removing MB dye from their aqueous solution [14]. However, under normal reaction conditions, its practical applicability is limited.…”

Facile synthesis of mesoporous nano Ni/NiO and its synergistic role as super adsorbent and photocatalyst under sunlight irradiation

“…NiO is a p-type semiconductor whose band gap ranges from 3.6 to 4.3 eV and is characterized by chemical stability, low toxicity, and high ionization energy (Bonomo 2018;Taeño et al 2021b). In the last decade, few researchers have utilized NiO as a photocatalyst for some environmental contaminants such as dyes (Jayakumar et al 2017;Sabouri et al 2018;Khairnar and Shrivastava 2019), antibiotics (Torki and Faghihian 2017), and free cyanide (Bashir et al 2019).…”