C-doped Nb2O5 with abundant mesopores has been successfully synthesized through a facile solvothermal synthetic strategy followed by calcination treatment. The resulting C-doped Nb2O5 displayed the highest BET surface...C-doped Nb2O5 with abundant mesopores has been successfully synthesized through a facile solvothermal synthetic strategy followed by calcination treatment. The resulting C-doped Nb2O5 displayed the highest BET surface area（345 m^2/g） and large mesopore size（ca. 4.2 nm）, capable of offering more accessible active sites as well as faster mass transfer for catalysis. Besides, the doping of C（2.21%, molar fraction） at the O sites in Nb2O5 lattice greatly enhanced visible-light response by lowering the band gap, thereby making the material a photocatalyst under visible-light irradiation. Typically, the C-doped Nb2O5 exhibited a high H2 evolution rate of ca. 39.10·μmol·g^-1·h^-1 and also degraded RhB dye completely after 30 min of visible light exposure, which turned out to be much better than Degussa P25 and pure Nb2O5 catalysts.展开更多
A new candidate for photocatalytic degradating organic dyes,CdS carried by car-bon nanotubes(CdS/CNTs) ,is reported. The degradation ratio curves of methyl orange in water phase show that the capability for degradatin...A new candidate for photocatalytic degradating organic dyes,CdS carried by car-bon nanotubes(CdS/CNTs) ,is reported. The degradation ratio curves of methyl orange in water phase show that the capability for degradating organic molecules of CdS/CNTs is obviously higher than that of separated CdS. The degradation ca-pability enhances as the increase of the amount of net CdS catalyst,the ratio of carbon nanotubes to CdS,and the area of the template,and is influenced by the pH value and the temperature of aqueous solution. These results suggest that the photocatalyst of CdS/CNTs is very suitable for potential applications in organic waste removal from water.展开更多
In this paper, the effects of solvent mixtures on the morphology, charge transport, and light trapping of poly[N-900-hepta-decanyl-2,7-carbazole-alt-5,5-（40,70-di-2-thienyl-20,10,30-benzothiadiazole）]（PCDTBT） and ...In this paper, the effects of solvent mixtures on the morphology, charge transport, and light trapping of poly[N-900-hepta-decanyl-2,7-carbazole-alt-5,5-（40,70-di-2-thienyl-20,10,30-benzothiadiazole）]（PCDTBT） and [6,6]-phenyl C71-butyric acid methyl ester（PC71BM） based solar cells were investigated. As a good solvent for PCDTBT, o-dichlorobenzene（ODCB） was selected to mix with chloroform（CF）, chlorobenzene（eB）, and 1,2,4-Trichloroben-zene（TCB） for optimizing the morphology of the PCDTBT：PCTIBM active layer. It can be found that the device performance of polymer solar cells（PSCs） has been greatly improved when using a optimal blend ratio. Especially, the PSCs fabricated via ODCB（90%）/CF（10%, volume fraction） mixture exhibit a remarkable enhancement of photon-to-current efficiency（PCE） from 5.16% to 7.47%. The enhanced performance of the PSCs can be attributed to the higher absorption, the lower resistance, and the optimized surface morphology of the active layers modified by the solvent mixtures.展开更多
基金Supported by the National Natural Science Foundation of China（No.21390394） and the National Basic Research Program of China（Nos. 2012CB821700, 2011CB808703）.
文摘C-doped Nb2O5 with abundant mesopores has been successfully synthesized through a facile solvothermal synthetic strategy followed by calcination treatment. The resulting C-doped Nb2O5 displayed the highest BET surface area（345 m^2/g） and large mesopore size（ca. 4.2 nm）, capable of offering more accessible active sites as well as faster mass transfer for catalysis. Besides, the doping of C（2.21%, molar fraction） at the O sites in Nb2O5 lattice greatly enhanced visible-light response by lowering the band gap, thereby making the material a photocatalyst under visible-light irradiation. Typically, the C-doped Nb2O5 exhibited a high H2 evolution rate of ca. 39.10·μmol·g^-1·h^-1 and also degraded RhB dye completely after 30 min of visible light exposure, which turned out to be much better than Degussa P25 and pure Nb2O5 catalysts.
基金Supported by the Major State Basic Research Development Program of China (Grant No. 10332020)the Institute of Nuclear Energy Technology of Tsinghua University Project for Fundamental Research (Grant No. 091131402)
文摘A new candidate for photocatalytic degradating organic dyes,CdS carried by car-bon nanotubes(CdS/CNTs) ,is reported. The degradation ratio curves of methyl orange in water phase show that the capability for degradating organic molecules of CdS/CNTs is obviously higher than that of separated CdS. The degradation ca-pability enhances as the increase of the amount of net CdS catalyst,the ratio of carbon nanotubes to CdS,and the area of the template,and is influenced by the pH value and the temperature of aqueous solution. These results suggest that the photocatalyst of CdS/CNTs is very suitable for potential applications in organic waste removal from water.
基金Supported by the National Natural Science Foundation of China（No.51073065） and the Key Project of Science and Tech-nology Development Plan of Jilin Province, China（Nos.20110412, 20130206019GX）.
文摘In this paper, the effects of solvent mixtures on the morphology, charge transport, and light trapping of poly[N-900-hepta-decanyl-2,7-carbazole-alt-5,5-（40,70-di-2-thienyl-20,10,30-benzothiadiazole）]（PCDTBT） and [6,6]-phenyl C71-butyric acid methyl ester（PC71BM） based solar cells were investigated. As a good solvent for PCDTBT, o-dichlorobenzene（ODCB） was selected to mix with chloroform（CF）, chlorobenzene（eB）, and 1,2,4-Trichloroben-zene（TCB） for optimizing the morphology of the PCDTBT：PCTIBM active layer. It can be found that the device performance of polymer solar cells（PSCs） has been greatly improved when using a optimal blend ratio. Especially, the PSCs fabricated via ODCB（90%）/CF（10%, volume fraction） mixture exhibit a remarkable enhancement of photon-to-current efficiency（PCE） from 5.16% to 7.47%. The enhanced performance of the PSCs can be attributed to the higher absorption, the lower resistance, and the optimized surface morphology of the active layers modified by the solvent mixtures.
