Gibberellin acid (GA) is one kind of ubiquitous phytohormones that regulates various developmental processes of the plant growth. Monitoring and controlling the phytohormone is very important to ensure the efficient growth of crops to bring a high yield and quality production in agriculture or horticulture. Since the content of phytohormone in a plant is very low, and easily decomposed by heat, light, and oxygen, it is of considerable interest to the phytohormone research to prepare some specific absorbants for adsorption of phytohormone molecules from the solution. A novel nanoporous carbon with tailored pore structure has been synthesized by dynamic carbonization with silica gel networks as a template, which was formed in sol-gel polycondensation using tetraethoxy silane (TEOS) as a silica precursor and sucrose as a carbon source. The pore structures of this kind of nanoporous carbon can be tunable to a high pore volume of 1.25 cm3/g and a large specific surface of 1744 m2/g, providing an high adsorption capacity about 6.8mg/g to the gibberellin acid (GA) in a solution within 9 h reaction time, and which is over 4~5 times higher than the adsorption of protein and starch in the same solution. It is indicated this nanoporous carbon materials has potential application as a novel absorbant in the separation and purification of GA from the solution for its monitoring assay.

 

Key words: Nanoporous carbon; Adsorption; Gibberellin acid;

 

This work was supported by the National Natural Science Foundation of China (Grants:50772034)