The fabrication of photocatalysts to achieve efficient utilization of renewable solar energy has attracted broad interest.Herein,a plasmonic spiky TiO_(2)/Au nanorod(NR)nanohybrid was prepared by in situ nucleation an...The fabrication of photocatalysts to achieve efficient utilization of renewable solar energy has attracted broad interest.Herein,a plasmonic spiky TiO_(2)/Au nanorod(NR)nanohybrid was prepared by in situ nucleation and growth of spiky TiO_(2)in AuNR colloidal solution.The spiky TiO_(2)/AuNR nanohybrids demonstrated enhanced hydrogen evolution activity and photocurrent generation under both visible light and simulated solar light irradiation as compared to bare spiky TiO_(2)nanoparticles and commercial TiO_(2).Specifically,the spiky nanohybrids displayed a high H2 production rate of 1.81 mmol g^(−1)h^(−1)under simulated solar light irradiation,which is 1.7 times higher than that of TiO_(2)/Au nanosphere nanohybrids,and remain stable for three cycles.The improved photocatalytic H2 evolution demonstrated by the nanohybrids can be ascribed to the coupling effect of the AuNRs and the unique spiky structure.Furthermore,the charge transfer process during H2 evolution was investigated by photocurrent and electrochemical impendence spectroscopy(EIS)measurements.A fast and stable photocurrent was observed for the spiky TiO_(2)/AuNR nanohybrid photoelectrode under both visible light and simulated solar light irradiation,while the EIS plots indicate a rapid charge transfer within the nanohybrids.Such a nanohybrid with a bioinspired structure will afford new insights for the fabrication of novel photocatalysts.展开更多
A supercapacitor electrode has been fabricated from macroscopic porous MnO2 aerogels,and has demonstrated an enhanced specific capacitance,a high rate capability and excellent cycling durability.The improvement of sup...A supercapacitor electrode has been fabricated from macroscopic porous MnO2 aerogels,and has demonstrated an enhanced specific capacitance,a high rate capability and excellent cycling durability.The improvement of supercapacitive performance can be attributed to the macro interconnected channels in the aerogel structure,which can not only facilitate mass transfer and reduce dead volume,but also provide an additional benefit of relieving stress.展开更多
基金supported by the National Natural Science Foundation of China(NSFC,21471067 and 51772121)Province Joint Fund(SXGJSF2017-2-4 and SXGJQY2017-1)Program for JLU Science and Technology Innovative Research Team(JLUSTIRT).
文摘The fabrication of photocatalysts to achieve efficient utilization of renewable solar energy has attracted broad interest.Herein,a plasmonic spiky TiO_(2)/Au nanorod(NR)nanohybrid was prepared by in situ nucleation and growth of spiky TiO_(2)in AuNR colloidal solution.The spiky TiO_(2)/AuNR nanohybrids demonstrated enhanced hydrogen evolution activity and photocurrent generation under both visible light and simulated solar light irradiation as compared to bare spiky TiO_(2)nanoparticles and commercial TiO_(2).Specifically,the spiky nanohybrids displayed a high H2 production rate of 1.81 mmol g^(−1)h^(−1)under simulated solar light irradiation,which is 1.7 times higher than that of TiO_(2)/Au nanosphere nanohybrids,and remain stable for three cycles.The improved photocatalytic H2 evolution demonstrated by the nanohybrids can be ascribed to the coupling effect of the AuNRs and the unique spiky structure.Furthermore,the charge transfer process during H2 evolution was investigated by photocurrent and electrochemical impendence spectroscopy(EIS)measurements.A fast and stable photocurrent was observed for the spiky TiO_(2)/AuNR nanohybrid photoelectrode under both visible light and simulated solar light irradiation,while the EIS plots indicate a rapid charge transfer within the nanohybrids.Such a nanohybrid with a bioinspired structure will afford new insights for the fabrication of novel photocatalysts.
基金supported by the National Natural Science Foundation of China(NSFC,21471067,51402121,and 51375204)Jilin Provincial Science&Technology Department(20140520163JH and 20140101056JC)Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry.
文摘A supercapacitor electrode has been fabricated from macroscopic porous MnO2 aerogels,and has demonstrated an enhanced specific capacitance,a high rate capability and excellent cycling durability.The improvement of supercapacitive performance can be attributed to the macro interconnected channels in the aerogel structure,which can not only facilitate mass transfer and reduce dead volume,but also provide an additional benefit of relieving stress.
