The preparation of uniform and well-dispersed catalysts is crucially important for the controlled growth of single-walled carbon nanotubes(SWCNTs)on substrates.We used graphene oxide(GO)as a support to prepare well-di...The preparation of uniform and well-dispersed catalysts is crucially important for the controlled growth of single-walled carbon nanotubes(SWCNTs)on substrates.We used graphene oxide(GO)as a support to prepare well-dispersed CoWO_(4)nanoparticles with a narrow diameter distribution.When using GO-supported CoWO_(4)as the catalyst precursor and performing the SWCNT growth under the optimized chemical vapor deposition conditions,we realized the diameter-controlled growth of SWCNTs with the mean size of 1.74±0.18 nm.CoWO_(4)is a superior catalyst precursor that can be used to obtain catalyst nanoparticles with a well-controlled size.GO shows to be a feasible substrate,presenting oxygen-containing groups which act as both the binding sites to facilitate the formation of uniform nanoparticles and hydrophilic groups to ensure a good dispersibility in aqueous solution.This strategy may find wide applications in the preparation of various functional nanomaterials.展开更多
基金supported by the Ministry of Science and Technology of China(2016YFA0201904)the National Natural Science Foundation of China(21631002)+2 种基金the Beijing National Laboratory for Molecular Sciences(BNLMS-CXTD-202001)the Shenzhen Basic Research Project(JCYJ20170817113121505)the Shenzhen KQTD Project(KQTD20180411143400981).
文摘The preparation of uniform and well-dispersed catalysts is crucially important for the controlled growth of single-walled carbon nanotubes(SWCNTs)on substrates.We used graphene oxide(GO)as a support to prepare well-dispersed CoWO_(4)nanoparticles with a narrow diameter distribution.When using GO-supported CoWO_(4)as the catalyst precursor and performing the SWCNT growth under the optimized chemical vapor deposition conditions,we realized the diameter-controlled growth of SWCNTs with the mean size of 1.74±0.18 nm.CoWO_(4)is a superior catalyst precursor that can be used to obtain catalyst nanoparticles with a well-controlled size.GO shows to be a feasible substrate,presenting oxygen-containing groups which act as both the binding sites to facilitate the formation of uniform nanoparticles and hydrophilic groups to ensure a good dispersibility in aqueous solution.This strategy may find wide applications in the preparation of various functional nanomaterials.
