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Facile synthesis of ultrahigh-surface-area hollow carbon nanospheres for enhanced adsorption and energy storage.

Xu F, Tang Z, Huang S, Chen L, Liang Y, Mai W, Zhong H, Fu R, Wu D - Nat Commun (2015)

Bottom Line: Here we report that high surface area of up to 3,022 m(2) g(-1) can be achieved for hollow carbon nanospheres with an outer diameter of 69 nm by a simple carbonization procedure with carefully selected carbon precursors and carbonization conditions.The tailor-made pore structure of hollow carbon nanospheres enables target-oriented applications, as exemplified by their enhanced adsorption capability towards organic vapours, and electrochemical performances as electrodes for supercapacitors and sulphur host materials for lithium-sulphur batteries.The facile approach may open the doors for preparation of highly porous carbons with desired nanostructure for numerous applications.

View Article: PubMed Central - PubMed

Affiliation: Materials Science Institute, PCFM Lab and GDHPPC Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.

ABSTRACT
Exceptionally large surface area and well-defined nanostructure are both critical in the field of nanoporous carbons for challenging energy and environmental issues. The pursuit of ultrahigh surface area while maintaining definite nanostructure remains a formidable challenge because extensive creation of pores will undoubtedly give rise to the damage of nanostructures, especially below 100 nm. Here we report that high surface area of up to 3,022 m(2) g(-1) can be achieved for hollow carbon nanospheres with an outer diameter of 69 nm by a simple carbonization procedure with carefully selected carbon precursors and carbonization conditions. The tailor-made pore structure of hollow carbon nanospheres enables target-oriented applications, as exemplified by their enhanced adsorption capability towards organic vapours, and electrochemical performances as electrodes for supercapacitors and sulphur host materials for lithium-sulphur batteries. The facile approach may open the doors for preparation of highly porous carbons with desired nanostructure for numerous applications.

No MeSH data available.


Related in: MedlinePlus

Organic vapour adsorption performances of HCNs.Adsorption capacity towards (a) toluene and (b) methanol vapours at various relative pressures for HCN-900-20H2R (red), HCN-900-10H5R (blue) and HCN-900-3H2R (black).
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f4: Organic vapour adsorption performances of HCNs.Adsorption capacity towards (a) toluene and (b) methanol vapours at various relative pressures for HCN-900-20H2R (red), HCN-900-10H5R (blue) and HCN-900-3H2R (black).

Mentions: The exceptionally large surface areas together with the adjustable pore structures make HCNs very attractive candidates for adsorption applications. The adsorption properties towards organic vapours, such as methanol and toluene, were investigated, which are of concern to the environment. As indicated in Fig. 4, the highest adsorption amounts of toluene and methanol at room temperature for HCN-900-20H2R are up to 1,500 and 1,230 mg g−1, respectively, at a relative vapour pressure of 0.9. The excellent adsorption performances are very competitive as compared with those of so many other porous materials, such as porous carbons (243–641 and 456–710 mg g−1 for methanol and toluene, respectively), nanoporous polymers (289–934 and 780–1,357 mg g−1 for methanol and toluene, respectively) and MOFs (100–480 and 125–1,285 mg g−1 for methanol and toluene, respectively; Supplementary Fig. 7 and Supplementary Table 4). Such an adsorption advantage enables great potential for their further environmental applications. Moreover, the adsorption capability can be tailored by using HCNs with different surface areas (Fig. 4); that is to say, one can choose an appropriate HCN as one wishes for different adsorption purposes to realize a target-oriented use. For example, with increasing the surface area of HCNs from 858, 2,095 to 3,022 m2 g−1, the adsorption amount can be tuned from 368, 925 to 1,500 mg g−1 for toluene vapour and 271, 779 to 1,230 mg g−1 for methanol vapour, respectively. Generally, it is believed that extensive exploration of the nanopores undoubtedly increases the number of pores, but at the expense of forming a great deal of inaccessible pore surface, namely, the decreased surface utilization efficiency (i.e., the adsorption amount divided by the SSA here). To our delight, the surface utilization efficiency of these HCNs keeps almost constant or even increases slightly for those with higher SSAs (Supplementary Fig. 8). These results unambiguously indicate that the effective pore-making strategy allows the highly accessible pore surface areas. In addition, HCNs demonstrate an excellent regeneration property, judging from the adsorption retention ratio of almost 100% over 10 cycles (Supplementary Fig. 9). All in all, the resulting HCNs are tolerant to different desired adsorption utilizations and show wonderful adsorption properties towards organic vapours, which would have potential use to eliminate harmful organic vapours in the environment.


Facile synthesis of ultrahigh-surface-area hollow carbon nanospheres for enhanced adsorption and energy storage.

Xu F, Tang Z, Huang S, Chen L, Liang Y, Mai W, Zhong H, Fu R, Wu D - Nat Commun (2015)

Organic vapour adsorption performances of HCNs.Adsorption capacity towards (a) toluene and (b) methanol vapours at various relative pressures for HCN-900-20H2R (red), HCN-900-10H5R (blue) and HCN-900-3H2R (black).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4490369&req=5

f4: Organic vapour adsorption performances of HCNs.Adsorption capacity towards (a) toluene and (b) methanol vapours at various relative pressures for HCN-900-20H2R (red), HCN-900-10H5R (blue) and HCN-900-3H2R (black).
Mentions: The exceptionally large surface areas together with the adjustable pore structures make HCNs very attractive candidates for adsorption applications. The adsorption properties towards organic vapours, such as methanol and toluene, were investigated, which are of concern to the environment. As indicated in Fig. 4, the highest adsorption amounts of toluene and methanol at room temperature for HCN-900-20H2R are up to 1,500 and 1,230 mg g−1, respectively, at a relative vapour pressure of 0.9. The excellent adsorption performances are very competitive as compared with those of so many other porous materials, such as porous carbons (243–641 and 456–710 mg g−1 for methanol and toluene, respectively), nanoporous polymers (289–934 and 780–1,357 mg g−1 for methanol and toluene, respectively) and MOFs (100–480 and 125–1,285 mg g−1 for methanol and toluene, respectively; Supplementary Fig. 7 and Supplementary Table 4). Such an adsorption advantage enables great potential for their further environmental applications. Moreover, the adsorption capability can be tailored by using HCNs with different surface areas (Fig. 4); that is to say, one can choose an appropriate HCN as one wishes for different adsorption purposes to realize a target-oriented use. For example, with increasing the surface area of HCNs from 858, 2,095 to 3,022 m2 g−1, the adsorption amount can be tuned from 368, 925 to 1,500 mg g−1 for toluene vapour and 271, 779 to 1,230 mg g−1 for methanol vapour, respectively. Generally, it is believed that extensive exploration of the nanopores undoubtedly increases the number of pores, but at the expense of forming a great deal of inaccessible pore surface, namely, the decreased surface utilization efficiency (i.e., the adsorption amount divided by the SSA here). To our delight, the surface utilization efficiency of these HCNs keeps almost constant or even increases slightly for those with higher SSAs (Supplementary Fig. 8). These results unambiguously indicate that the effective pore-making strategy allows the highly accessible pore surface areas. In addition, HCNs demonstrate an excellent regeneration property, judging from the adsorption retention ratio of almost 100% over 10 cycles (Supplementary Fig. 9). All in all, the resulting HCNs are tolerant to different desired adsorption utilizations and show wonderful adsorption properties towards organic vapours, which would have potential use to eliminate harmful organic vapours in the environment.

Bottom Line: Here we report that high surface area of up to 3,022 m(2) g(-1) can be achieved for hollow carbon nanospheres with an outer diameter of 69 nm by a simple carbonization procedure with carefully selected carbon precursors and carbonization conditions.The tailor-made pore structure of hollow carbon nanospheres enables target-oriented applications, as exemplified by their enhanced adsorption capability towards organic vapours, and electrochemical performances as electrodes for supercapacitors and sulphur host materials for lithium-sulphur batteries.The facile approach may open the doors for preparation of highly porous carbons with desired nanostructure for numerous applications.

View Article: PubMed Central - PubMed

Affiliation: Materials Science Institute, PCFM Lab and GDHPPC Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.

ABSTRACT
Exceptionally large surface area and well-defined nanostructure are both critical in the field of nanoporous carbons for challenging energy and environmental issues. The pursuit of ultrahigh surface area while maintaining definite nanostructure remains a formidable challenge because extensive creation of pores will undoubtedly give rise to the damage of nanostructures, especially below 100 nm. Here we report that high surface area of up to 3,022 m(2) g(-1) can be achieved for hollow carbon nanospheres with an outer diameter of 69 nm by a simple carbonization procedure with carefully selected carbon precursors and carbonization conditions. The tailor-made pore structure of hollow carbon nanospheres enables target-oriented applications, as exemplified by their enhanced adsorption capability towards organic vapours, and electrochemical performances as electrodes for supercapacitors and sulphur host materials for lithium-sulphur batteries. The facile approach may open the doors for preparation of highly porous carbons with desired nanostructure for numerous applications.

No MeSH data available.


Related in: MedlinePlus