Graphite Felt Supported MgO Catalytic Ozonation of Bisphenol A

Zhang, Xiaofang; Shen, Tongdong; Ding, Yalei; Tong, Shaoping

doi:10.1080/01919512.2019.1593102

Cited by 12 publications

(8 citation statements)

References 31 publications

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“…Zhang and the co‐workers prepared graphite felt supported magnesium oxide (MgO/GF) catalyst and use in the catalytic ozonation of Bisphenol A [23c] . In the first step, the ozone adsorbed on the MgO/GF reacted with MgO/GF−OH to yield MgO/GF−O•, which easier reacted with ozone and yield hydroxyl radicals.…”

Section: Ozone Adsorptionmentioning

confidence: 99%

The Adsorption of Ozone on the Solid Catalyst Surface and the Catalytic Reaction Mechanism for Organic Components

Luo

Xie

et al. 2020

ChemistrySelect

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Ozone is a strong gas oxidant and is often considered as an important source of atomic oxygen. It can not only sterilize but also decompose most organic components in water. In organic reactions, it can be used for carbon‐carbon double bond oxidation. Because ozone is unstable and easy to decompose, the oxidations usually need to be carried out in the presence of low temperature or catalysts to improve the ozone utilization. The adsorption mechanisms of ozone on the surface of solid catalysts are different due to the characteristics of the ozone molecule and the different reaction conditions. In this paper, the adsorption and reaction mechanisms of ozone on solid catalyst surface are reviewed: Firstly, the ozone has weak alkalinity similar to that of CO, but the distribution of electrons in the ozone molecule exists the difference. The difference in electron distribution makes ozone to be a dipole. The central oxygen atom can accept electrons as the Lewis acid, while the terminal oxygens are electron donors to be the Lewis base. Secondly, the functional groups, which have Lewis acid and base sites, such as hydroxyl groups, can be adsorbed with the central or terminal oxygen of ozone to form a surface complex. Last, the solvents also have a critical effect on the adsorption of ozone and subsequent oxidation. According to the above mechanisms, the design and preparation of ozonation catalysts are also proposed to improve the ozonation selectivity.

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Section: Ozone Adsorptionmentioning

confidence: 99%

The Adsorption of Ozone on the Solid Catalyst Surface and the Catalytic Reaction Mechanism for Organic Components

Luo

Xie

et al. 2020

ChemistrySelect

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“…The peaks shown at around 105 °C in MgO can correspond to the weak alkalescent site. The peaks at higher temperatures than 200 °C correspond to the strong alkalescent sites, such as oxygen in the Mg 2+ and O 2– pairs and isolated O. − With the addition of CoO x , the CO 2 desorption temperature of these two peaks increased obviously. This indicates that the addition of CoO x can improve the surface alkalinity of catalysts.…”

Section: Resultsmentioning

confidence: 99%

“…The vibrations at 1445 and 3700 cm –1 can correspond to the stretching vibrations of Mg–O and O–H vibrations in Mg(OH) 2 or hydroxyl groups formed from water molecules absorbed on catalysts, respectively . The existence of hydroxyl groups on the surface of MgO can change the pH of the solution to about 11, thereby promoting the generation of free radicals and improving the catalytic activity. − …”

Section: Resultsmentioning

confidence: 99%

Efficient Treatment of Phenol Wastewater by Catalytic Ozonation over Micron-Sized Hollow MgO Rods

Zhang

Zhou

et al. 2021

ACS Omega

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Phenol is a nocuous water pollutant that threatens human health and the ecological environment. CoOx-doped micron-sized hollow MgO rods were prepared for the treatment of phenol wastewater by catalytic ozonation. Magnesium sources, precipitants, initial precursor concentration, Co/Mg molar ratio, and catalyst calcination temperature were optimized to obtain the best catalysts. Prepared catalysts were also well characterized by various methods to analyze their structure and physical and chemical properties. In this process, CoOx/MgO with the largest large surface area (151.3 m3/g) showed the best catalytic performance (100 and 79.8% of phenol and chemical oxygen demand (COD) removal ratio, respectively). The hydrolysis of CoOx/MgO plays a positive role in the degradation of phenol. The catalytic mechanism of the degradation of O3 to free radicals over catalysts has been investigated by in situ electronic paramagnetic resonance (EPR). The catalyst can be reused at least five times without any activity decline. The prepared CoOx/MgO catalyst also showed excellent catalytic performance for removal and degradation of ciprofloxacin, norfloxacin, and salicylic acid.

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“…For addressing this issue, the catalytic ozonation process has been developed, in which the ozone is supplied to the vicinity of catalyst, accelerating the decomposition of ozone and thereby facilitating the formation of ˙OH. Previous studies have reported the feasible performance of metal oxides ( e.g ., MgO, 24 Co 3 O 4 , 25 MnO 2 , 26 and CeO 2 27,28 ) for the application of the catalytic ozonation in water treatment due to their low toxicity. Different from other metal oxides, the reversible reduction of Ce 4+ to Ce 3+ will effectively tune the storage capacity of oxygen atoms in CeO 2 , 29,30 which may decrease the activation energy barrier of ozone decomposition.…”

Section: Introductionmentioning

confidence: 99%

Enhanced degradation of dimethyl phthalate in wastewater via heterogeneous catalytic ozonation process: performances and mechanisms

Yuan

Guo

et al. 2022

RSC Adv.

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Graphite Felt Supported MgO Catalytic Ozonation of Bisphenol A

Cited by 12 publications

References 31 publications

The Adsorption of Ozone on the Solid Catalyst Surface and the Catalytic Reaction Mechanism for Organic Components

The Adsorption of Ozone on the Solid Catalyst Surface and the Catalytic Reaction Mechanism for Organic Components

Efficient Treatment of Phenol Wastewater by Catalytic Ozonation over Micron-Sized Hollow MgO Rods

Enhanced degradation of dimethyl phthalate in wastewater via heterogeneous catalytic ozonation process: performances and mechanisms

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