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Significantly enhanced dye removal performance of hollow tin oxide nanoparticles via carbon coating in dark environment and study of its mechanism.

Yang S, Wu Z, Huang L, Zhou B, Lei M, Sun L, Tian Q, Pan J, Wu W, Zhang H - Nanoscale Res Lett (2014)

Bottom Line: The resulting products were characterized in terms of morphology, composition, and surface property by various analytical techniques.Moreover, the SnO2@C hollow nanoparticles are shown to be effective adsorbents for removing four different dyes from aqueous solutions, which is superior to the pure hollow SnO2 nanoparticles and commercial SnO2.The enhanced mechanism has also been discussed, which can be attributed to the high specific surface areas after carbon coating.

View Article: PubMed Central - HTML - PubMed

Affiliation: State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, People's Republic of China ; Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, People's Republic of China.

ABSTRACT
Understanding the correlation between physicochemical properties and morphology of nanostructures is a prerequisite for widespread applications of nanomaterials in environmental application areas. Herein, we illustrated that the uniform-sized SnO2@C hollow nanoparticles were large-scale synthesized by a facile hydrothermal method. The size of the core-shell hollow nanoparticles was about 56 nm, and the shell was composed of a solid carbon layer with a thickness of 2 ~ 3 nm. The resulting products were characterized in terms of morphology, composition, and surface property by various analytical techniques. Moreover, the SnO2@C hollow nanoparticles are shown to be effective adsorbents for removing four different dyes from aqueous solutions, which is superior to the pure hollow SnO2 nanoparticles and commercial SnO2. The enhanced mechanism has also been discussed, which can be attributed to the high specific surface areas after carbon coating.

No MeSH data available.


SAED patterns and TEM images at low and high magnifications. (a) TEM image at low magnification (the inset is the histogram of particle diameters). (b) SAED patterns and (c) TEM images at high magnification (the inset scale bar is 10 nm) of the as-prepared hollow SnO2 nanoparticles, and (d) HRTEM image of a single SnO2 nanoparticle (the inset scale bar is 2 nm).
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Figure 2: SAED patterns and TEM images at low and high magnifications. (a) TEM image at low magnification (the inset is the histogram of particle diameters). (b) SAED patterns and (c) TEM images at high magnification (the inset scale bar is 10 nm) of the as-prepared hollow SnO2 nanoparticles, and (d) HRTEM image of a single SnO2 nanoparticle (the inset scale bar is 2 nm).

Mentions: The structure and morphology of the as-prepared hollow SnO2 nanoparticles are investigated by TEM and HRTEM. As shown in Figure 2a, the as-prepared samples mainly consist of uniform flower-like nanoparticles. The contrast (dark/bright) between the boundary and the center of the nanoparticles confirms their hollow nature. The histogram of the particle diameters (inset in Figure 2a) demonstrates that the average diameter of the as-prepared hollow SnO2 nanoparticles is 53 nm. The bright rings in the selected-area electron diffraction (SAED) pattern (Figure 2b) can be well indexed to the rutile-phase SnO2. Figure 2c shows the TEM image at high magnification of the hollow SnO2 nanoparticles. It can be seen that the SnO2 particles were consist of small SnO2 grains, and the surface of the SnO2 particles is rough, which means that the shell is incomplete and porous, not solid. This feature endows that the hollow SnO2 nanoparticles have high surface area. As shown in Figure 2d, the HRTEM image confirms that the SnO2 particles consist of small SnO2 grains, and their size is about 3 ~ 5 nm. From the insets of Figure 2d, there are two lattice fringes with lattice spacing of about 0.334 and 0.26 nm, which can be assigned to the (110) and (101) planes of tetragonal rutile-phase SnO2 nanoparticles, respectively.


Significantly enhanced dye removal performance of hollow tin oxide nanoparticles via carbon coating in dark environment and study of its mechanism.

Yang S, Wu Z, Huang L, Zhou B, Lei M, Sun L, Tian Q, Pan J, Wu W, Zhang H - Nanoscale Res Lett (2014)

SAED patterns and TEM images at low and high magnifications. (a) TEM image at low magnification (the inset is the histogram of particle diameters). (b) SAED patterns and (c) TEM images at high magnification (the inset scale bar is 10 nm) of the as-prepared hollow SnO2 nanoparticles, and (d) HRTEM image of a single SnO2 nanoparticle (the inset scale bar is 2 nm).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150862&req=5

Figure 2: SAED patterns and TEM images at low and high magnifications. (a) TEM image at low magnification (the inset is the histogram of particle diameters). (b) SAED patterns and (c) TEM images at high magnification (the inset scale bar is 10 nm) of the as-prepared hollow SnO2 nanoparticles, and (d) HRTEM image of a single SnO2 nanoparticle (the inset scale bar is 2 nm).
Mentions: The structure and morphology of the as-prepared hollow SnO2 nanoparticles are investigated by TEM and HRTEM. As shown in Figure 2a, the as-prepared samples mainly consist of uniform flower-like nanoparticles. The contrast (dark/bright) between the boundary and the center of the nanoparticles confirms their hollow nature. The histogram of the particle diameters (inset in Figure 2a) demonstrates that the average diameter of the as-prepared hollow SnO2 nanoparticles is 53 nm. The bright rings in the selected-area electron diffraction (SAED) pattern (Figure 2b) can be well indexed to the rutile-phase SnO2. Figure 2c shows the TEM image at high magnification of the hollow SnO2 nanoparticles. It can be seen that the SnO2 particles were consist of small SnO2 grains, and the surface of the SnO2 particles is rough, which means that the shell is incomplete and porous, not solid. This feature endows that the hollow SnO2 nanoparticles have high surface area. As shown in Figure 2d, the HRTEM image confirms that the SnO2 particles consist of small SnO2 grains, and their size is about 3 ~ 5 nm. From the insets of Figure 2d, there are two lattice fringes with lattice spacing of about 0.334 and 0.26 nm, which can be assigned to the (110) and (101) planes of tetragonal rutile-phase SnO2 nanoparticles, respectively.

Bottom Line: The resulting products were characterized in terms of morphology, composition, and surface property by various analytical techniques.Moreover, the SnO2@C hollow nanoparticles are shown to be effective adsorbents for removing four different dyes from aqueous solutions, which is superior to the pure hollow SnO2 nanoparticles and commercial SnO2.The enhanced mechanism has also been discussed, which can be attributed to the high specific surface areas after carbon coating.

View Article: PubMed Central - HTML - PubMed

Affiliation: State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, People's Republic of China ; Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, People's Republic of China.

ABSTRACT
Understanding the correlation between physicochemical properties and morphology of nanostructures is a prerequisite for widespread applications of nanomaterials in environmental application areas. Herein, we illustrated that the uniform-sized SnO2@C hollow nanoparticles were large-scale synthesized by a facile hydrothermal method. The size of the core-shell hollow nanoparticles was about 56 nm, and the shell was composed of a solid carbon layer with a thickness of 2 ~ 3 nm. The resulting products were characterized in terms of morphology, composition, and surface property by various analytical techniques. Moreover, the SnO2@C hollow nanoparticles are shown to be effective adsorbents for removing four different dyes from aqueous solutions, which is superior to the pure hollow SnO2 nanoparticles and commercial SnO2. The enhanced mechanism has also been discussed, which can be attributed to the high specific surface areas after carbon coating.

No MeSH data available.