• 文献标题:   Study on adsorptive behavior of pyrolytic nitrogen-doped graphene gel
  • 文献类型:   Article
  • 作  者:   GENG JY, TAO Q, LIU L, WANG BW, CHEN LG
  • 作者关键词:   ndoped graphene, adsorption, dye, pyrolysi, functional group
  • 出版物名称:   COLLOIDS SURFACES APHYSICOCHEMICAL ENGINEERING ASPECTS
  • ISSN:   0927-7757 EI 1873-4359
  • 通讯作者地址:   Tianjin Univ
  • 被引频次:   2
  • DOI:   10.1016/j.colsurfa.2018.12.013
  • 出版年:   2019

▎ 摘  要

A series of 3D nitrogen-doped graphene gels (NG) were synthesized by the hydrothermal process and further modified by pyrolysis. Characterization results indicated that the distribution of nitrogen- and oxygen-containing groups on the pyrolytic NG surface was significantly affected by the pyrolysis temperature. In the adsorption test, the NG adsorbent treated at 1000 degrees C showed the best performance for methylene blue. As the temperature increases from 200 to 1000 degrees C, the adsorptive capacity of pyrolytic NG hybrids was enhanced gradually, accompanied by the improvement of the adsorptive rate. Moreover, all NG adsorbents were fit for Langmuir isotherm. However, the adsorption dynamic behavior of pyrolytic NG hybrids followed pseudo-second-order model rather than pseudo-first-order model when the pyrolysis temperature exceeds 1000 degrees C. The above results are possibly attributed to the synergistic effect between specific surface area and the functional groups on the surface of adsorbents.