Defect engineering greatly enhances the cat-alytic activity of transition metal semiconductor photocat-alysts.Recently,localized surface defects engineering has been intensively researched,but it still remains challen...Defect engineering greatly enhances the cat-alytic activity of transition metal semiconductor photocat-alysts.Recently,localized surface defects engineering has been intensively researched,but it still remains challenges on how to tilt the balance to the controllable construction of surface defects rather than bulk ones.Here,we report a facile room-temperature solution processing strategy on(001)facet exposed anatase TiO_(2) nanosheets(ATO),in which localized defects are generated on the surface selectivity with high concentration.To achieve the aspect,lithium-ethylenediamine(Li-EDA)treatment is carried out on(001)facet exposed ATO under a mild condition.The optimized sample exhibits outstanding photocatalytic H_(2) production rates of 9.28 mmol·g^(-1)·h^(-1) with loading 0.5 wt%Pt as co-catalyst(AM 1.5),which is nearly 7.5 times higher than that of the pristine ATO.This defect engi-neering strategy of ATO photocatalyst will spark the ideas for the defects engineering and semiconductor photocata-lyst,which is with important application prospect in solar energy conversion,including hydrogen generation and carbon dioxide reduction.展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.21902104 and 21701135)the Natural Science Foundation of Top Talent of Shenzhen Technology University (No.2019108101003)the Foundation for Young Innovative Talents in Higher Education of Guangdong (No.2018KQNCX401)
文摘Defect engineering greatly enhances the cat-alytic activity of transition metal semiconductor photocat-alysts.Recently,localized surface defects engineering has been intensively researched,but it still remains challenges on how to tilt the balance to the controllable construction of surface defects rather than bulk ones.Here,we report a facile room-temperature solution processing strategy on(001)facet exposed anatase TiO_(2) nanosheets(ATO),in which localized defects are generated on the surface selectivity with high concentration.To achieve the aspect,lithium-ethylenediamine(Li-EDA)treatment is carried out on(001)facet exposed ATO under a mild condition.The optimized sample exhibits outstanding photocatalytic H_(2) production rates of 9.28 mmol·g^(-1)·h^(-1) with loading 0.5 wt%Pt as co-catalyst(AM 1.5),which is nearly 7.5 times higher than that of the pristine ATO.This defect engi-neering strategy of ATO photocatalyst will spark the ideas for the defects engineering and semiconductor photocata-lyst,which is with important application prospect in solar energy conversion,including hydrogen generation and carbon dioxide reduction.
