Photocatalytic hydrogen evolution from water splitting is a promising strategy for realizing the vision of carbon neutrality.Herein,a novel SrTi O_(3)-SrCO_(3)n-n heterojunction was used for the first time for water s...Photocatalytic hydrogen evolution from water splitting is a promising strategy for realizing the vision of carbon neutrality.Herein,a novel SrTi O_(3)-SrCO_(3)n-n heterojunction was used for the first time for water splitting to generate H_(2).The heterojunction was synthesized by a soft chemical one-pot hydrothermal method.The Sr TiO_(3)-SrCO_(3)loading with 3 wt%Pt shows the maximum photocatalytic H_(2)evolution rate of3.62 mmol h^(-1)g^(-1)under simulated sunlight irradiation,which is 20.1 times higher than that of pristine SrTiO_(3).The apparent quantum efficiency of Sr TiO_(3)-SrCO_(3)reaches 21.73%at 313 nm,and it shows good stability during cyclic experiment.The formation of compact Sr TiO_(3)-SrCO_(3)heterojunction with strong interfacial electronic interaction promotes the transmission and separation of photo-generated carriers.The results of XPS,PL,PC,EIS and DFT support the mechanism of improving photocatalytic activity based on carrier dynamics.This work provides a facile and effective method to enhance the activity of Sr Ti O_(3)-based heterojunction photocatalysts.展开更多
基金supported by the Key Research Projects of Science and Technology Department of Sichuan Province (No. 2020YJ0260)。
文摘Photocatalytic hydrogen evolution from water splitting is a promising strategy for realizing the vision of carbon neutrality.Herein,a novel SrTi O_(3)-SrCO_(3)n-n heterojunction was used for the first time for water splitting to generate H_(2).The heterojunction was synthesized by a soft chemical one-pot hydrothermal method.The Sr TiO_(3)-SrCO_(3)loading with 3 wt%Pt shows the maximum photocatalytic H_(2)evolution rate of3.62 mmol h^(-1)g^(-1)under simulated sunlight irradiation,which is 20.1 times higher than that of pristine SrTiO_(3).The apparent quantum efficiency of Sr TiO_(3)-SrCO_(3)reaches 21.73%at 313 nm,and it shows good stability during cyclic experiment.The formation of compact Sr TiO_(3)-SrCO_(3)heterojunction with strong interfacial electronic interaction promotes the transmission and separation of photo-generated carriers.The results of XPS,PL,PC,EIS and DFT support the mechanism of improving photocatalytic activity based on carrier dynamics.This work provides a facile and effective method to enhance the activity of Sr Ti O_(3)-based heterojunction photocatalysts.
