3D-hierarchically structured MnO2 for catalytic oxidation of phenol solutions by activation of peroxymonosulfate: Structure dependence and mechanism

Nanocarbons in different structural dimensions (0–3D) for phenol adsorption and metal-free catalytic oxidation

“…In the third run, CMK-3-T was no longer efficient in catalytic oxidation which only removed phenol about 20% in 240 min. The poor catalytic stability of nanocarbons still needs improvement in future studies [11,21,58]. Fig.…”

“…It was known that • OH and SO 4 •-radicals show different reaction rates with two radical scavengers, ethanol (EtOH) and tertbutyl alcohol (TBA). The quenching agent of EtOH can capture both • OH and SO 4 •-while TBA prefers capturing • OH radicals rather than SO 4 •-radicals [58]. Fig.…”

“…Electron paramagnetic resonance (EPR) spectroscopy can be used to monitor the generation and evolution of the reactive radicals by catalytic activation of PMS [58][59][60]. In this study, the time-dependent evolutions of hydroxyl and sulfate radicals were monitored by EPR.…”

Synthetic conditions-regulated catalytic Oxone efficacy of MnO x /SBA-15 towards butyl paraben (BPB) removal under heterogeneous conditions

“…For example, MnO 2 has been shown to have oxidative and adsorption capacity towards endocrine disruption compounds and organic dyes [2,3]. Meanwhile, MnO x has also been demonstrated as a prominent catalyst to degrade organic pollutants in water and air [4][5][6][7][8]. However, MnO x in its bare forms has some intrinsic structural drawbacks like aggregation and poor stability, which inevitably limit its practical applications.…”

Effect of preparation methods on morphology of active manganese dioxide and 2,4-dinitrophenol adsorption performance

“…Moreover, owing to the high oxidation potential (E 0 ¼ 1.23 V), manganese oxide could participate in a wide range of chemical oxidation reactions (Cheng et al, 2017;Guo et al, 2017). Manganese dioxide has been widely researched as adsorbents and catalysts for environmental remediation purposes, such as organic dye (Ge and Qu, 2003), phenolic compounds (Wang et al, 2015;Zhang et al, 2011), heavy metal (Peng et al, 2015;Yu et al, 2015), humic acid (Davranche et al, 2008), and endocrine disrupting compounds (Rudder et al, 2004).…”