Graphene Oxide Assisted Hydrothermal Carbonization of Carbon Hydrates

ACS Nano ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. 449-457 ◽  
Author(s):  
Deepti Krishnan ◽  
Kalyan Raidongia ◽  
Jiaojing Shao ◽  
Jiaxing Huang
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Carbonization ◽  
Carbon Hydrates

scholarly journals Facile preparation and highly efficient sorption of magnetic composite graphene oxide/Fe3O4/GC for uranium removal

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aili Yang ◽  
Zhijun Wang ◽  
Yukuan Zhu
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Adsorption Capacity ◽  
High Efficiency ◽  
Removal Rate ◽  
Low Cost ◽  
Hydrothermal Carbonization ◽  
Maximum Adsorption Capacity ◽  
Magnetic Composite ◽  
Order Kinetic

AbstractIn this work, we reported for the first time a novel magnetic composite graphene oxide/Fe3O4/glucose-COOH (GO/Fe3O4/GC) that was facilely prepared from glucose through the hydrothermal carbonization and further combination with graphene oxide (GO). The chemical and structural properties of the samples were investigated. By the batch uranium adsorption experiments, the magnetic composite GO/Fe3O4/GC exhibits an excellent adsorption performance and fast solid–liquid separation for uranium from aqueous solution. GO/Fe3O4/GC (the maximum adsorption capacity (Qm) was 390.70 mg g−1) exhibited excellent adsorption capacity and higher removal rate (> 99%) for U(VI) than those of glucose-COOH (GC) and magnetic GC (MGC). The effect of the coexisting ions, such as Na+, K+, Mg2+, Ca2+, and Al3+, on the U(VI) removal efficiency of GO/Fe3O4/GC was examined. The equilibrium sorption and sorption rate for the as-prepared adsorbents well fit the Langmuir model and pseudo second-order kinetic model, respectively. The thermodynamic parameters (ΔH0 = 11.57 kJ mol−1 and ΔG0 < 0) for GO/Fe3O4/GC indicate that the sorption process of U(VI) was exothermic and spontaneous. Thus, this research provides a facile strategy for the preparation of the magnetic composite with low cost, high efficiency and fast separation for the U(VI) removal from aqueous solution.

Graphene oxide induced hydrothermal carbonization of egg proteins for high-performance supercapacitors

2017 ◽  
Vol 5 (32) ◽  
pp. 17040-17047 ◽  
Author(s):  
Hongyun Ma ◽  
Chun Li ◽  
Miao Zhang ◽  
Jong-Dal Hong ◽  
Gaoquan Shi
Keyword(s):  
Graphene Oxide ◽  
Porous Carbon ◽  
Carbon Material ◽  
High Performance ◽  
Hydrothermal Carbonization ◽  
Porous Carbon Material ◽  
Highly Porous ◽  
Graphene Oxide Sheets

With the assistance of graphene oxide sheets, egg proteins were hydrothermally carbonized and further activated using KOH to form a heteroatom-doped highly porous carbon material for high-performance supercapacitors.

Improved capacity of redox-active functional carbon cathodes by dimension reduction for hybrid supercapacitors

2018 ◽  
Vol 6 (8) ◽  
pp. 3367-3375 ◽  
Author(s):  
Tianyuan Liu ◽  
Byeongyong Lee ◽  
Michael J. Lee ◽  
Jinho Park ◽  
Zhongming Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Dimension Reduction ◽  
Hydrothermal Carbonization ◽  
Carbon Electrodes ◽  
Two Dimensional ◽  
Hybrid Supercapacitors ◽  
Redox Active

Two-dimensional functional carbon electrodes prepared by hydrothermal carbonization of glucose with a graphene oxide template can deliver high capacities of 250 mA h g−1 in Li-cells and 210 mA h g−1 in Na-cells.

scholarly journals Facile Preparation and Highly Efficient Sorption of Magnetic Composite Graphene Oxide/Fe3O4/GC for Uranium Removal

2021 ◽  
Author(s):  
Aili Yang ◽  
Zhijun Wang ◽  
Yukuan Zhu
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Adsorption Capacity ◽  
High Efficiency ◽  
Removal Rate ◽  
Low Cost ◽  
Hydrothermal Carbonization ◽  
Maximum Adsorption Capacity ◽  
Magnetic Composite ◽  
Order Kinetic

Abstract In this work, we reported for the first time a novel magnetic composite graphene oxide/Fe3O4/glucose-COOH (GO/Fe3O4/GC) that was facilely prepared from glucose through the hydrothermal carbonization and further combination with graphene oxide (GO). The chemical and structural properties of the samples were investigated. By the batch uranium adsorption experiments, the magnetic composite GO/Fe3O4/GC exhibits an excellent adsorption performance and fast solid-liquid separation for uranium from aqueous solution. GO/Fe3O4/GC (the maximum adsorption capacity (Qm) was 390.70 mg g-1) exhibited excellent adsorption capacity and higher removal rate (> 99%) for U(VI) than those of glucose-COOH (GC) and magnetic GC (MGC). The effect of the coexisting ions, such as Na+, K+, Mg2+, Ca2+, and Al3+, on the U(VI) removal efficiency of GO/Fe3O4/GC was examined. The equilibrium sorption and sorption rate for the as-prepared adsorbents well fit the Langmuir model and pseudo second-order kinetic model, respectively. The thermodynamic parameters (ΔH0 = 11.57 kJ mol-1 and ΔG0 < 0) for GO/Fe3O4/GC indicate that the sorption process of U(VI) was exothermic and spontaneous. Thus, this research provides a facile strategy for the preparation of the magnetic composite with low cost, high efficiency and fast separation for the U(VI) removal from aqueous solution.

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