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

doi:10.1021/acsomega.9b01883

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	Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes
	Gu, Yajie; Sun, Shengrui; Liu, Yangqiao; Dong, Manjiang; Yang, Qingfeng
	2019-10-29
Source Publication	ACS OMEGA
ISSN	2470-1343
Volume	4 Issue:18 Pages:17672
Subtype	Article
Abstract	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 center dot-, HO center dot, and O-2(center dot-) 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.
DOI	10.1021/acsomega.9b01883
Language	英语
WOS Research Area	Chemistry
Publisher	AMER CHEMICAL SOC
Citation statistics	Cited Times:2[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/26758
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Gu, Yajie,Sun, Shengrui,Liu, Yangqiao,et al. Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes[J]. ACS OMEGA,2019,4(18):17672.
APA	Gu, Yajie,Sun, Shengrui,Liu, Yangqiao,Dong, Manjiang,&Yang, Qingfeng.(2019).Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes.ACS OMEGA,4(18),17672.
MLA	Gu, Yajie,et al."Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes".ACS OMEGA 4.18(2019):17672.

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