Lactic acid production from copper-doped tin sulphide-loaded graphene oxide aerogel photocatalytic reforming of cellulose digest
In this study,copper doped tin sulfide supported graphene oxide aerogels were successfully prepared by hydrothermal freeze-drying calcination method(CuxSnSO@GO).The material was characterized by XRD,SEM,TEM,and UV-vis DRS,and the effects of different Cu doping amounts and reaction times on the production of lactic acid from photocatalytic reforming of cellulose digest were studied.The results showed that copper was successfully incorporated into the SnS2 structure,resulting in surface sulfur defects,changing the band gap of SnS2,and improving its photocatalytic properties.In addition,CuxSnSO@GO produced by the calcination process improved the separation efficiency of photo generated electrons and holes,significantly improving photocatalytic efficiency.Under visible light irradiation,CuxSnSO@GO can efficiently photocatalytic reform the cellulose hydrolysis and lactic acid can be achieved.When the Cu doping amount is 6%,the reaction time is 4 hours,CuxSnSO@GO has an optimal yield of 38.8%.The CuxSnSO@GO surface sulfur vacancies formed,high absorption,adjustable band structure,and the CuxSnS2-SnO2 heterojunction formed after calcination are all conducive to the selective conversion of lactic acid,providing a new approach for studying the mechanism of biomass photocatalytic reforming.
NETL
NSTL
万方数据
维普
