Multiwalled carbon nanotubes were oxidized with concentrated HNO3 and H2SO4 to introduce carbox-ylic groups onto carbon nanotubes surfaces. The oxidized carbon nanotubes were reacted subse-quently with thionyl chlorid...Multiwalled carbon nanotubes were oxidized with concentrated HNO3 and H2SO4 to introduce carbox-ylic groups onto carbon nanotubes surfaces. The oxidized carbon nanotubes were reacted subse-quently with thionyl chloride and 2-Hydroxylethyl-2′-bromoisobutyrate, producing MWNT-based macroinitiators, MWNT-Br, for the atom transfer radical polymerization of (N-isopropylacrylamide). FTIR, XPS, 1H NMR, Raman and TGA were used to characterize the resulting products and to determine the content of the water-soluble poly (N-isopropylacrylamide) chains in the product. The MWNTs grafted with PNIPAM chains have good solubility in distilled water; THF and CHCl3. TEM images of the samples provide direct evidence for the formation of a nanostructure that MWNTs coated with polymer layer. The produced MWNT-g-PNIPAM has a PNIPAM shell, which is very sensitive to the change of temperature. This method would open a door for the fabrication of novel functional carbon nanotube-based nano-materials or nanodevices with designable structure and tailor-made properties.展开更多
Biphasic defective TiO2-x/reduced graphene oxide（RGO） nanocomposites were synthesized by simple hydrothermal reactions. Compared with TiO2-x and commercial P25, TiO2-x/RGO shows much better photocatalytic activity a...Biphasic defective TiO2-x/reduced graphene oxide（RGO） nanocomposites were synthesized by simple hydrothermal reactions. Compared with TiO2-x and commercial P25, TiO2-x/RGO shows much better photocatalytic activity and excellent stability in pollutants degradation, which could be ascribed to Ti^3＋ centers complexed with RGO and the synergetic effect between the two phases. The study reveals a new route for the synthesis of mixed-phase defective TiO2-x/carbon material nanocomposites for photocatalytic applications.展开更多
基金the Fund of Talent Team Construction of Anhui University (Grant No. 02203104)
文摘Multiwalled carbon nanotubes were oxidized with concentrated HNO3 and H2SO4 to introduce carbox-ylic groups onto carbon nanotubes surfaces. The oxidized carbon nanotubes were reacted subse-quently with thionyl chloride and 2-Hydroxylethyl-2′-bromoisobutyrate, producing MWNT-based macroinitiators, MWNT-Br, for the atom transfer radical polymerization of (N-isopropylacrylamide). FTIR, XPS, 1H NMR, Raman and TGA were used to characterize the resulting products and to determine the content of the water-soluble poly (N-isopropylacrylamide) chains in the product. The MWNTs grafted with PNIPAM chains have good solubility in distilled water; THF and CHCl3. TEM images of the samples provide direct evidence for the formation of a nanostructure that MWNTs coated with polymer layer. The produced MWNT-g-PNIPAM has a PNIPAM shell, which is very sensitive to the change of temperature. This method would open a door for the fabrication of novel functional carbon nanotube-based nano-materials or nanodevices with designable structure and tailor-made properties.
基金Supported by the Doctoral Startup Foundation of Anhui University, China（No. 10113190077）, the Natural Science Founda- tion of Anhui Province, China（No. 1608085QB39） and the National Natural Science Foundation of China（No. 51402001）.
文摘Biphasic defective TiO2-x/reduced graphene oxide（RGO） nanocomposites were synthesized by simple hydrothermal reactions. Compared with TiO2-x and commercial P25, TiO2-x/RGO shows much better photocatalytic activity and excellent stability in pollutants degradation, which could be ascribed to Ti^3＋ centers complexed with RGO and the synergetic effect between the two phases. The study reveals a new route for the synthesis of mixed-phase defective TiO2-x/carbon material nanocomposites for photocatalytic applications.
