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Facile preparation of oxygen-rich activated carbon from petroleum coke for enhancing methylene blue adsorption

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2020, 30(6), pp.627-636
  • DOI : 10.1007/s42823-020-00134-0
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : September 21, 2019
  • Accepted : March 4, 2020
  • Published : December 1, 2020

Wu Wei 1 Zhang Xiaxiang 1 Yang Jianxiao 1 Lijun Cai 1 Li Xuanke 1

1Hunan University

Accredited

ABSTRACT

The oxygen-rich activated carbon (AC) was facilely developed using petroleum coke as a raw material by KOH activa�tion under the rapid heating rate. The porosity and surface chemistry of ACs prepared under diferent heating rates were characterized and their adsorption properties for methylene blue (MB) were investigated. The results showed that the AC5 prepared under the heating rate of 5 °C min−1 had the highest surface area compared with the AC10, AC15 or AC20, while the AC20 prepared under the heating rate of 20 °C min−1 consisted of the highest oxygen content and most –OH functional group compares with the other ACs. These indicated that rapid heating rate was against the formation of more developed porosity, however, it was benefcial to producing more oxygen functional groups. As to MB adsorption, AC15 exhibited the maximum adsorption capacity for MB of 884 mg g−1 due to high surface area of 2803 m2 g−1 and high oxygen content of 23.27%. Moreover, despite the fact that AC20 had much lower surface area than the AC5, the AC20 showed higher MB adsorption capacity than the AC5. This was because the AC20 has the highest content of –OH, which was a positive impetus for MB adsorption. Therefore, rapid heating rate was an efective and simple approach to preparing the oxygen-rich ACs for improving the adsorption capacity of MB.

Citation status

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Total Citation Counts(KCI+WOS) (10) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (9) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

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