The N-doped bismuth tungstate （BizWOt） photocatalysts with high visible light activity were prepared by the hydrothermal method using urea as a nitrogen source. The as-prepared N-doped Bi2WO6 samoles were characteri...The N-doped bismuth tungstate （BizWOt） photocatalysts with high visible light activity were prepared by the hydrothermal method using urea as a nitrogen source. The as-prepared N-doped Bi2WO6 samoles were characterized by X-ray diffraction, scanning electron microscopy, specific surface area, photocurrent analysis, and UV-Vis diffuse re- flectrance spectroscopy. The photocatalytic activity was evaluated by photocatalytic degradation of rhodamine B （RhB） solution under visible light irradiation. The photocatalytic mechanisms were analyzed by active species trapping experi- ments which revealed that the holes were the main active species of N-doped BizWO6 products in aqueous solution under visible light irradiation, rather than .OH and O-. With the assistance of H202, the photocatalytic activity for degradation of RhB could be further improved because H202 reacted with conduction band electrons to generate more hydroxyl radicals. KEY WORDS：展开更多
Square and labyrinth-like titanium dioxide particles were successfully synthesized by a simple hydrothermal method with assistant of halloysite nanotubes. The morphology and microstructure of as-prepared photo-catalys...Square and labyrinth-like titanium dioxide particles were successfully synthesized by a simple hydrothermal method with assistant of halloysite nanotubes. The morphology and microstructure of as-prepared photo-catalysts were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The photo-catalytic activity of as-prepared catalysts was evaluated by degradation of organic pollutants（Rhodamine B, methylene blue and methanol） under UV light irradiation.展开更多
Humidity sensors have become an essential need for improving daily life quality.Here,a novel humidity sensitive fiber was fabricated using the soft polydimethylsiloxane(PDMS)as the core layer and the non-swellable pol...Humidity sensors have become an essential need for improving daily life quality.Here,a novel humidity sensitive fiber was fabricated using the soft polydimethylsiloxane(PDMS)as the core layer and the non-swellable polyvinylidenedifluoride(PVDF)embedded with a swellable MIL-88A as the outer layer.Noticeably,the PDMS fiber was chosen as a carrier due to its smoothness,softness and good tensile properties.The isoreticular FeIII dicarboxylate MIL-88 family with swellable metal-organic frameworks(MOFs)can undergo reversible dynamic structural transformations with a response to external humidity change.The resulted fiber with swellable MOFs showed three kinds of deformation for a single solvent and also had good deformation performance for two-component miscible solution with different volume ratios.As a proof of concept,a shape-memory effect at relative humidity from 10 to 90%and the simulated salt solutions instead of relative humidity changes were used to evaluate humidity change.In addition,a deep insight into the self-shape-change mechanism among those phenomena was investigated,wherein expansion deformation of the PDMS fiber as well as the structural transforma-tion of the MIL-88A worked in different conditions.展开更多
基金financially supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholarsthe State Education Ministry(No.1001603-C)+3 种基金"521 Talents Training Plan" in ZSTUthe National Natural Science Foundation of China(Nos.51373155 and 51133006)the Natural Science Foundation of Zhejiang Province(No.LY13B030009)the Innovative Program for Graduate Students of Zhejiang Sci-Tech University(No.2013YSPY15)
文摘The N-doped bismuth tungstate （BizWOt） photocatalysts with high visible light activity were prepared by the hydrothermal method using urea as a nitrogen source. The as-prepared N-doped Bi2WO6 samoles were characterized by X-ray diffraction, scanning electron microscopy, specific surface area, photocurrent analysis, and UV-Vis diffuse re- flectrance spectroscopy. The photocatalytic activity was evaluated by photocatalytic degradation of rhodamine B （RhB） solution under visible light irradiation. The photocatalytic mechanisms were analyzed by active species trapping experi- ments which revealed that the holes were the main active species of N-doped BizWO6 products in aqueous solution under visible light irradiation, rather than .OH and O-. With the assistance of H202, the photocatalytic activity for degradation of RhB could be further improved because H202 reacted with conduction band electrons to generate more hydroxyl radicals. KEY WORDS：
基金financially supported by the ‘‘511 Talents Training Plan’’ in ZSTU,the National Natural Science Foundation of China (Nos.51133006 and 51373155)the Natural Science Foundation of Zhejiang Province(No.LY13B030009)
文摘Square and labyrinth-like titanium dioxide particles were successfully synthesized by a simple hydrothermal method with assistant of halloysite nanotubes. The morphology and microstructure of as-prepared photo-catalysts were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The photo-catalytic activity of as-prepared catalysts was evaluated by degradation of organic pollutants（Rhodamine B, methylene blue and methanol） under UV light irradiation.
基金support from Zhejiang Top Priority Discipline of Textile Science and Engineering,Natural Science Foundation of Zhejiang Province(No.LY13B030009)Science Foundation of Zhejiang Sci-Tech University(ZSTU)(No.1101820-Y).
文摘Humidity sensors have become an essential need for improving daily life quality.Here,a novel humidity sensitive fiber was fabricated using the soft polydimethylsiloxane(PDMS)as the core layer and the non-swellable polyvinylidenedifluoride(PVDF)embedded with a swellable MIL-88A as the outer layer.Noticeably,the PDMS fiber was chosen as a carrier due to its smoothness,softness and good tensile properties.The isoreticular FeIII dicarboxylate MIL-88 family with swellable metal-organic frameworks(MOFs)can undergo reversible dynamic structural transformations with a response to external humidity change.The resulted fiber with swellable MOFs showed three kinds of deformation for a single solvent and also had good deformation performance for two-component miscible solution with different volume ratios.As a proof of concept,a shape-memory effect at relative humidity from 10 to 90%and the simulated salt solutions instead of relative humidity changes were used to evaluate humidity change.In addition,a deep insight into the self-shape-change mechanism among those phenomena was investigated,wherein expansion deformation of the PDMS fiber as well as the structural transforma-tion of the MIL-88A worked in different conditions.
