One-pot fabrication of petroleum pitch derived hierarchical porous carbon via a recyclable MgO-templating strategy for p-nitrophenol removal

Xu, Guangwen; Shang, Hongrui; Gong, Wenyu; Zhang, Xiaolei; Shan, Yichu; Ding, Junwei; Yu, Wenlong

doi:10.1016/j.jece.2022.108458

Cited by 8 publications

(1 citation statement)

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“…Among the metal oxide templates, MgO receives much interest for the following advantages [39,40]: (1) MgO has good thermal and chemical stability, hence the structure and composition of MgO will not change and it will not react with carbide during the carbonization process; (2) MgO is recyclable and can be easily removed by dilute acids;…”

Section: Introductionmentioning

confidence: 99%

Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-Nitrophenol

Gan

Xiao

2023

Catalysts

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Hierarchically porous carbon (PC) was synthesized by a templating method, using magnesium salts (Mg(HCO3)2, MgC2O4 and MgO) as template precursors and citric acid as carbon precursor. During the carbonization process, besides the production of MgO particles, many gases (e.g., CO2/NO2/H2O) were also released and acted as a porogen to generate pores in carbon. The resulting composite (MgO@C) was subsequently treated with HCl solution to remove the MgO templates, yielding hierarchically porous carbon. The surface oxygen functional groups over porous carbon were characterized by TPD and XPS, which showed that the PC-bic, synthesized using Mg(HCO3)2 as the template precursor, had the highest value among the PCs. As expected, the PC-bic exhibited the best performances for electrocatalytic reduction of 4-nitrophenol, with a peak current of −135.5 μA at −0.679 V. The effects of 4-nitrophenol concentration, buffer solution pH and scanning rate on the electrocatalytic activities, as well as the stability of PC-bic for the reaction were investigated.

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Section: Introductionmentioning

confidence: 99%