Sn3O4, a common two-dimensional semiconductor photocatalyst, can absorb visible light.However, owing to its rapid recombination of photogenerated electron-hole pairs, its absorption is not sufficient for practical app...Sn3O4, a common two-dimensional semiconductor photocatalyst, can absorb visible light.However, owing to its rapid recombination of photogenerated electron-hole pairs, its absorption is not sufficient for practical application.In this work, a Sn nanoparticle/Sn3O4-x nanosheet heterostructure was prepared by in situ reduction of Sn3O4 under a H2 atmosphere.The Schottky junctions formed between Sn and Sn3O4-x can enhance the photogenerated carrier separation ability.During the hydrogenation process, a portion of the oxygen in the semiconductor can be extracted by hydrogen to form water, resulting in an increase in oxygen vacancies in the semiconductor.The heterostructure showed the ability to remove Rhodamine B.Cell cytocompatibility experiments proved that Sn/Sn3O4-x can significantly enhance cell compatibility and reduce harm to organisms.This work provides a new method for the fabrication of a Schottky junction composite photocatalyst rich in oxygen vacancies with enhanced photocatalytic performance.展开更多
Antibiotic misuse has resulted in the emergence of superbugs,warranting new antibacterial methods.Surface amorphisation oxygen vacancy-rich porous Sn_(3)O_(x)nanosheets in situ grown on Ni foam are successfully design...Antibiotic misuse has resulted in the emergence of superbugs,warranting new antibacterial methods.Surface amorphisation oxygen vacancy-rich porous Sn_(3)O_(x)nanosheets in situ grown on Ni foam are successfully designed via a simple,one-step hydrothermal method,resulting in enhanced photoelectrochemical(PEC)bacterial inactivation.In this system,the porous structure enriches its surface with oxygen vacancies,which can extend the absorption spectrum into the near-infrared region,while oxygen vacancies can enhance the separation of electronhole pairs.Most importantly,the sheet-like porous structure enhances surface active sites and increase the contact area between bacteria and electrodes.Therefore,the reactive oxygen species produced during the PEC process can directly act on the surface of bacteria and is100%effectively against drug-resistant Gram-positive and Gram-negative bacteria in water within 30 min.This study acts as a foundation for the development of novel photoelectrocatalyst electrodes for efficient water purification.展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.51802115 and 51732007)the Natural Science Foundation of Shandong Province, China (No.ZR2019YQ21)。
文摘Sn3O4, a common two-dimensional semiconductor photocatalyst, can absorb visible light.However, owing to its rapid recombination of photogenerated electron-hole pairs, its absorption is not sufficient for practical application.In this work, a Sn nanoparticle/Sn3O4-x nanosheet heterostructure was prepared by in situ reduction of Sn3O4 under a H2 atmosphere.The Schottky junctions formed between Sn and Sn3O4-x can enhance the photogenerated carrier separation ability.During the hydrogenation process, a portion of the oxygen in the semiconductor can be extracted by hydrogen to form water, resulting in an increase in oxygen vacancies in the semiconductor.The heterostructure showed the ability to remove Rhodamine B.Cell cytocompatibility experiments proved that Sn/Sn3O4-x can significantly enhance cell compatibility and reduce harm to organisms.This work provides a new method for the fabrication of a Schottky junction composite photocatalyst rich in oxygen vacancies with enhanced photocatalytic performance.
基金financially supported by the National Natural Science Foundation of China(Nos.51732007,52272212)the Natural Science Foundation of Shandong Province(No.ZR2022JQ20)。
文摘Antibiotic misuse has resulted in the emergence of superbugs,warranting new antibacterial methods.Surface amorphisation oxygen vacancy-rich porous Sn_(3)O_(x)nanosheets in situ grown on Ni foam are successfully designed via a simple,one-step hydrothermal method,resulting in enhanced photoelectrochemical(PEC)bacterial inactivation.In this system,the porous structure enriches its surface with oxygen vacancies,which can extend the absorption spectrum into the near-infrared region,while oxygen vacancies can enhance the separation of electronhole pairs.Most importantly,the sheet-like porous structure enhances surface active sites and increase the contact area between bacteria and electrodes.Therefore,the reactive oxygen species produced during the PEC process can directly act on the surface of bacteria and is100%effectively against drug-resistant Gram-positive and Gram-negative bacteria in water within 30 min.This study acts as a foundation for the development of novel photoelectrocatalyst electrodes for efficient water purification.
