The biggest challenging issue in photocatalysis is efficient separation of the photoinduced carriers and the aggregation of photoexcited electrons on photocatalyst’s surface.In this paper,we report that double metall...The biggest challenging issue in photocatalysis is efficient separation of the photoinduced carriers and the aggregation of photoexcited electrons on photocatalyst’s surface.In this paper,we report that double metallic co-catalysts Ti3C2 MXene and metallic octahedral(1T)phase tungsten disulfide(WS2)act pathways transferring photoexcited electrons in assisting the photocatalytic H2 evolution.TiO2 nanosheets were in situ grown on highly conductive Ti3C2 MXenes and 1T-WS2 nanoparticles were then uniformly distributed on TiO2@Ti3C2 composite.Thus,a distinctive 1T-WS2@TiO2@Ti3C2 composite with double metallic co-catalysts was achieved,and the content of 1T phase reaches 73%.The photocatalytic H2 evolution performance of 1T-WS2@TiO2@Ti3C2 composite with an optimized 15 wt%WS2 ratio is nearly 50 times higher than that of TiO2 nanosheets because of conductive Ti3C2 MXene and 1T-WS2 resulting in the increase of electron transfer efficiency.Besides,the 1T-WS2 on the surface of TiO2@Ti3C2 composite enhances the Brunauer–Emmett–Teller surface area and boosts the density of active site.展开更多
Dear Editor,Cyanophages are viruses that infect cyanobacteria.They play an important role in shaping the genetic and functional diversity of themselves and their hosts through genetic exchange and shuffling(Lindell et...Dear Editor,Cyanophages are viruses that infect cyanobacteria.They play an important role in shaping the genetic and functional diversity of themselves and their hosts through genetic exchange and shuffling(Lindell et al.,2005;Singh et al.,2012).The psb A gene of cyanophages is a'hostderived'gene,and its encoded D1 protein is capable展开更多
Ni/Co/SiO_(2) hydrophobic coatings were fabricated by embedding SiO_(2) nanoparticles into Ni/Co coatings using pulsed electrodeposition,followed by a liquid-phase hydrophobic treatment.Microstructure and morphology a...Ni/Co/SiO_(2) hydrophobic coatings were fabricated by embedding SiO_(2) nanoparticles into Ni/Co coatings using pulsed electrodeposition,followed by a liquid-phase hydrophobic treatment.Microstructure and morphology analysis of the composite coatings revealed that the SiO_(2) nanoparticles were homogenously distributed in the Ni/Co coating,and the surfaces of the samples were close-grained without crack.Furthermore,the SiO_(2) nanoparti-cles in the coating formed micro-nano structures on its surface,such that the contact angle reached 125°following the hydrophobic modification.The surface of the hydrophobic coating was found to be abrasion resistant and ex-hibited long-term stability in water.The corrosion inhibition efficiency of the Ni/Co/SiO_(2) hydrophobic coatings on a Q235 carbon steel substrate in simulated seawater solution reached 98.6%,indicating optimal anti-corrosion performance.展开更多
基金fundings from the National Natural Science Foundation of China (Nos. 51872173 and 51772167)Taishan Scholarship of Young Scholars (No. tsqn201812068)+2 种基金Natural Science Foundation of Shandong Province (No. ZR2017JL020)Taishan Scholarship of Climbing Plan (No. tspd20161006)Key Research and Development Program of Shandong Province (No. 2018GGX102028)
文摘The biggest challenging issue in photocatalysis is efficient separation of the photoinduced carriers and the aggregation of photoexcited electrons on photocatalyst’s surface.In this paper,we report that double metallic co-catalysts Ti3C2 MXene and metallic octahedral(1T)phase tungsten disulfide(WS2)act pathways transferring photoexcited electrons in assisting the photocatalytic H2 evolution.TiO2 nanosheets were in situ grown on highly conductive Ti3C2 MXenes and 1T-WS2 nanoparticles were then uniformly distributed on TiO2@Ti3C2 composite.Thus,a distinctive 1T-WS2@TiO2@Ti3C2 composite with double metallic co-catalysts was achieved,and the content of 1T phase reaches 73%.The photocatalytic H2 evolution performance of 1T-WS2@TiO2@Ti3C2 composite with an optimized 15 wt%WS2 ratio is nearly 50 times higher than that of TiO2 nanosheets because of conductive Ti3C2 MXene and 1T-WS2 resulting in the increase of electron transfer efficiency.Besides,the 1T-WS2 on the surface of TiO2@Ti3C2 composite enhances the Brunauer–Emmett–Teller surface area and boosts the density of active site.
基金financially supported by grants from National Nature Science Foundation of China(41271262)the Strategic Priority Research Program of Chinese Academy of Sciences(XDB15010103)
文摘Dear Editor,Cyanophages are viruses that infect cyanobacteria.They play an important role in shaping the genetic and functional diversity of themselves and their hosts through genetic exchange and shuffling(Lindell et al.,2005;Singh et al.,2012).The psb A gene of cyanophages is a'hostderived'gene,and its encoded D1 protein is capable
基金the Distinguished Taishan Scholars in Climbing plan(No.tspd20161006).
文摘Ni/Co/SiO_(2) hydrophobic coatings were fabricated by embedding SiO_(2) nanoparticles into Ni/Co coatings using pulsed electrodeposition,followed by a liquid-phase hydrophobic treatment.Microstructure and morphology analysis of the composite coatings revealed that the SiO_(2) nanoparticles were homogenously distributed in the Ni/Co coating,and the surfaces of the samples were close-grained without crack.Furthermore,the SiO_(2) nanoparti-cles in the coating formed micro-nano structures on its surface,such that the contact angle reached 125°following the hydrophobic modification.The surface of the hydrophobic coating was found to be abrasion resistant and ex-hibited long-term stability in water.The corrosion inhibition efficiency of the Ni/Co/SiO_(2) hydrophobic coatings on a Q235 carbon steel substrate in simulated seawater solution reached 98.6%,indicating optimal anti-corrosion performance.
