Preparation of Nanometer-Sized Nickel Oxide by Hydrothermal Decomposition

Song, Yan; Wei, Chang; Li, Cun Xiong; Xu, Haowei; Liu, Da Qiang

doi:10.4028/www.scientific.net/amr.399-401.698

Cited by 1 publication

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the same way, Ni 2+ followed a similar process in an ethanol/water system and self-assembled into a flowerlike structure. As for NiO-W, Ni(OH) 2 is formed by the hydrolysis of urea as a precursor at the initial stage of the hydrothermal process . The faster initial nucleation and growth rates and an oriented attachment mechanism result in the formation of a hexagonal platelet structure …”

Section: Resultsmentioning

confidence: 99%

“…As for NiO-W, Ni(OH) 2 is formed by the hydrolysis of urea as a precursor at the initial stage of the hydrothermal process. 33 The faster initial nucleation and growth rates and an oriented attachment mechanism result in the formation of a hexagonal platelet structure. 34 The NiO catalysts were further characterized by transmission electron microscope (TEM) and high-resolution TEM (HRTEM) (Figure 3).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes

Sun

Liu

et al. 2019

ACS Omega

View full text Add to dashboard Cite

In this work, we successfully prepared three different mesoporous NiO nanostructures with preferential (111) planes using three different solvents–water, a water–ethanol mixture, and a water–ethylene glycol mixture. The NiO nanosheets prepared from the water–ethylene glycol mixture and denoted as NiO-EG showed a nanosheet morphology thinner than 10 nm, whereas the water–ethanol and water samples were 30–40 nm and above 100 nm thick, respectively. The NiO-EG catalyst was found to exhibit a high catalyzing ability to activate peroxymonosulfate (PMS) for decoloring dyes, by which 94.4% of acid orange 7 (AO7) was degraded under the following reaction conditions: AO7 = 50 mg/L, catalyst = 0.2 g/L, PMS = 0.8 g/L, pH = 7, and 30 min reaction time. The dye degradation rate was investigated as a function of the catalyst dosage, pH, and dye concentration. According to quenching experiments, it was found that SO4•–, HO•, and O2•– were the dominant radicals for AO7 degradation, and oxygen vacancies played a significant role in the generation of radicals. High surface area, thin flaky structure, rich oxygen vacancies, fast charge transport, and low diffusion impedance all enhanced the catalytic activity of NiO-EG, which exhibited the highest degradation ability due to its abundant accessible active sites for both adsorption and catalysis.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%