A new 3D Ag（I） coordination polymer {[Ag（AZDB）（0.5）（bpe）（0.5）]·H2O}n（1） has been papared by azobenzene-3,3？-dicarboxylicate（H2AZDB）, 1,2-bis（4-pyridyl）ethylene（bpe） and silver salts via hydroth...A new 3D Ag（I） coordination polymer {[Ag（AZDB）（0.5）（bpe）（0.5）]·H2O}n（1） has been papared by azobenzene-3,3？-dicarboxylicate（H2AZDB）, 1,2-bis（4-pyridyl）ethylene（bpe） and silver salts via hydrothermal method. The compound was fully characterized by single-crystal X-ray diffraction, elemental analyses, infrared spectrum（IR）, powder X-ray diffraction（PXRD） and thermogravimetric analysis（TGA）. The strucrural analysis indicate that compound 1 shows a 3D pillared-layer framework constructed from a unique 1D Ag2O2 ribbon and pyridyl/carboxylicate mixed system, which features a 2-nodal（4, 6）-connected fsc net with a（4^4·6^10·8）（4^4·6^2） topology.Moreover, the photoluminescent properties have also been discussed.展开更多
Ag2O/TiO2 heterostructure has been constructed by loading corner-truncated cubic Ag2O on the TiO2 hollow nanofibers via an electrospinning-precipitation method. Compared to individual Ag2O and TiO2, Ag2O/TiO2 heterost...Ag2O/TiO2 heterostructure has been constructed by loading corner-truncated cubic Ag2O on the TiO2 hollow nanofibers via an electrospinning-precipitation method. Compared to individual Ag2O and TiO2, Ag2O/TiO2 heterostructure exhibits obviously enhanced photocatalytic activity for the photodegradation of methyl orange(MO) under visible light irradiation. The composite with molar ratio of Ag2O to TiO2 at 4:10 exhibits the best photocatalytic performance with MO degraded 93% in 6 min. The superior activity is mainly attributed to the surface plasmon resonance(SPR) effect of metallic Ag in-situ produced during the photocatalytic process, which can favor electron transfer to the conduction band of TiO2. This leads to the efficient separation of photogenerated carriers, thus a superior photodegradation activity. Moreover, the energy band alignments of Ag2O/TiO2 heterostructure are calculated, which provides strong support for the proposed mechanism.展开更多
In the present work,a remarkable combination of non-thermal plasma and photocatalyst was developed to widen the operating temperature window of selective catalytic reduction(SCR)of NOx with CH4,especially to improve t...In the present work,a remarkable combination of non-thermal plasma and photocatalyst was developed to widen the operating temperature window of selective catalytic reduction(SCR)of NOx with CH4,especially to improve the low-temperature removal efficiency of NOx.It was shown that the operating temperature window was significantly widened.Among all the catalysts prepared,1%Ag2O/TiO2 showed the highest catalytic activity for NOx removal due to the utilization of near ultraviolet light.The conversion of NOx to N2 over the in-plasma 1%Ag2O/TiO2 photocatalyst at 60 and 300℃ could achieve 31.8%and 53.0%,respectively.The combination mode of plasma and catalyst affected NOx removal efficiency greatly,the in-plasma catalysis outperformed the post-plasma catalytic mode remarkably,signifying the contribution of photocatalytic processes on the catalysts.Meanwhile,the characterizations of the catalyst demonstrated that the morphology and structure of the Ag2O/TiO2 catalyst were unchanged throughout the non-thermal plasma and photocatalytic processes,implying the superior stability of the catalyst.展开更多
基金supported by the NSF of Hubei Province(No.2014CFB277)the Open Foundation of Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecular Chemistry(No.338080057)
文摘A new 3D Ag（I） coordination polymer {[Ag（AZDB）（0.5）（bpe）（0.5）]·H2O}n（1） has been papared by azobenzene-3,3？-dicarboxylicate（H2AZDB）, 1,2-bis（4-pyridyl）ethylene（bpe） and silver salts via hydrothermal method. The compound was fully characterized by single-crystal X-ray diffraction, elemental analyses, infrared spectrum（IR）, powder X-ray diffraction（PXRD） and thermogravimetric analysis（TGA）. The strucrural analysis indicate that compound 1 shows a 3D pillared-layer framework constructed from a unique 1D Ag2O2 ribbon and pyridyl/carboxylicate mixed system, which features a 2-nodal（4, 6）-connected fsc net with a（4^4·6^10·8）（4^4·6^2） topology.Moreover, the photoluminescent properties have also been discussed.
基金supported by the National Natural Science Foundation of China(21407025)the Natural Science Foundation of Fujian Province(2016J01047)New Century Talent Project of Fujian Province,the Projects of Fujian Provincial Department of Education(JT180350)。
文摘Ag2O/TiO2 heterostructure has been constructed by loading corner-truncated cubic Ag2O on the TiO2 hollow nanofibers via an electrospinning-precipitation method. Compared to individual Ag2O and TiO2, Ag2O/TiO2 heterostructure exhibits obviously enhanced photocatalytic activity for the photodegradation of methyl orange(MO) under visible light irradiation. The composite with molar ratio of Ag2O to TiO2 at 4:10 exhibits the best photocatalytic performance with MO degraded 93% in 6 min. The superior activity is mainly attributed to the surface plasmon resonance(SPR) effect of metallic Ag in-situ produced during the photocatalytic process, which can favor electron transfer to the conduction band of TiO2. This leads to the efficient separation of photogenerated carriers, thus a superior photodegradation activity. Moreover, the energy band alignments of Ag2O/TiO2 heterostructure are calculated, which provides strong support for the proposed mechanism.
基金Supported by the Natural Science Foundation of Zhejiang Province,China(No.LQ17B060006).
文摘In the present work,a remarkable combination of non-thermal plasma and photocatalyst was developed to widen the operating temperature window of selective catalytic reduction(SCR)of NOx with CH4,especially to improve the low-temperature removal efficiency of NOx.It was shown that the operating temperature window was significantly widened.Among all the catalysts prepared,1%Ag2O/TiO2 showed the highest catalytic activity for NOx removal due to the utilization of near ultraviolet light.The conversion of NOx to N2 over the in-plasma 1%Ag2O/TiO2 photocatalyst at 60 and 300℃ could achieve 31.8%and 53.0%,respectively.The combination mode of plasma and catalyst affected NOx removal efficiency greatly,the in-plasma catalysis outperformed the post-plasma catalytic mode remarkably,signifying the contribution of photocatalytic processes on the catalysts.Meanwhile,the characterizations of the catalyst demonstrated that the morphology and structure of the Ag2O/TiO2 catalyst were unchanged throughout the non-thermal plasma and photocatalytic processes,implying the superior stability of the catalyst.
