Simulating photosynthesis to convert CO_(2)into valuable chemicals is an effective strategy to achieve sustainable carbon recycles,and the high conversion efficiency and selectivity of photocatalytic conversion CO_(2)...Simulating photosynthesis to convert CO_(2)into valuable chemicals is an effective strategy to achieve sustainable carbon recycles,and the high conversion efficiency and selectivity of photocatalytic conversion CO_(2)to specific chemicals are the key challenges.Herein,a direct Z-scheme Bi_(2)WO_(6)/La_(2)Ti_(2)O_(7)photocatalyst is successfully syn-thesized by electrostatic self-assembly method.The selectivity of CO_(2)reduction to CO is improved from 74%of La_(2)Ti_(2)O_(7)to nearly 100%,and the CO yield is 7.5 times that of individual La_(2)Ti_(2)O_(7).The improvement of the photocatalytic performance is attributed to the formation of Z-scheme heterojunction between Bi_(2)WO_(6)and La_(2)Ti_(2)O_(7),which facilitates the separation and transfer of photogenerated carriers.This work provides a new insight for the construction of efficient photocatalyst for selective reduction of CO_(2)to CO.展开更多
A convenient,effcient and environmentally benign procedure has been developed for the synthesis of pyrano[4,3-b]pyran derivatives via a one-pot,three-component reaction of 4-hydroxy-6-methylpyran-2-one,aldehydes and m...A convenient,effcient and environmentally benign procedure has been developed for the synthesis of pyrano[4,3-b]pyran derivatives via a one-pot,three-component reaction of 4-hydroxy-6-methylpyran-2-one,aldehydes and malononitrile in water using H6P2W18O62á18H2O as catalyst.Reusability of the catalyst and reaction media,short reaction times and easy isolation of products are some added advantages of the present methodology.展开更多
基金supported by the National Natural Science Foundation of China(21972020 and 22172031)the Natural Science Foundation of Fujian Province(2021L3003)
文摘Simulating photosynthesis to convert CO_(2)into valuable chemicals is an effective strategy to achieve sustainable carbon recycles,and the high conversion efficiency and selectivity of photocatalytic conversion CO_(2)to specific chemicals are the key challenges.Herein,a direct Z-scheme Bi_(2)WO_(6)/La_(2)Ti_(2)O_(7)photocatalyst is successfully syn-thesized by electrostatic self-assembly method.The selectivity of CO_(2)reduction to CO is improved from 74%of La_(2)Ti_(2)O_(7)to nearly 100%,and the CO yield is 7.5 times that of individual La_(2)Ti_(2)O_(7).The improvement of the photocatalytic performance is attributed to the formation of Z-scheme heterojunction between Bi_(2)WO_(6)and La_(2)Ti_(2)O_(7),which facilitates the separation and transfer of photogenerated carriers.This work provides a new insight for the construction of efficient photocatalyst for selective reduction of CO_(2)to CO.
文摘A convenient,effcient and environmentally benign procedure has been developed for the synthesis of pyrano[4,3-b]pyran derivatives via a one-pot,three-component reaction of 4-hydroxy-6-methylpyran-2-one,aldehydes and malononitrile in water using H6P2W18O62á18H2O as catalyst.Reusability of the catalyst and reaction media,short reaction times and easy isolation of products are some added advantages of the present methodology.
