Crystalline materials with specific facet atomic arrangements and crystal facet structures exhibit unique functions according to their facet effects,quantum size effects and physical and chemical properties.In this study,a novel high-exposure(110)facet of bismuth oxyiodide(BiOI)was prepared(denoted as BiOI-110),and designed as nanosheets rich in oxygen vacancies by crystal facet design and regulation.Graphitic carbon nitride was designed as curved carbon nitride with dibromopyrazine,denoted as DCN,which contributed to a significant structural distortion in plane symmetry and improved the separation of charge carriers.Novel heterostructured BiOI-110/DCN nanosheets with a high-exposure(110)facet and abundant oxygen vacancies were successfully designed to enhance the photocatalytic degradation of organic pollu-tants.It was demonstrated that complete and tight contact between BiOI-110 and DCN was achieved by changing the size and crystal facet of BiOI.Oxytetracycline(OTC)and methyl blue dyes were used as targets for pollutant degradation,and 85.6％and 96.5％photocatalytic degra-dation efficiencies,respectively,were observed in the optimal proportion of 7％BiOI-110/DCN.The experi-mental results and electron spin resonance analysis showed that·O2-and h+played a major role in the process of pollutant degradation.Additionally,high-resolution liquid chromatography-mass spectrography was used to identify the reaction intermediates of OTC,and the possible degradation pathway of this pollutant was proposed.Finally,the excellent reusability of BiOI-110/DCN nanomaterials was confirmed,providing a new approach for the removal of antibiotics that are difficult to biodegrade.Overall,crystal facet design has been proven to have broad prospects in improving the water environ-ment.

School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China;National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization,Hebei University of Technology,Tianjin 300130,China

[1]Jianxin Chen;Yupeng Li;Jihui Li;Jian Han;Guijun Zhu;Liang Ren-.Crystal design of bismuth oxyiodide with highly exposed(110)facets on curved carbon nitride for the photocatalytic degradation of pollutants in wastewater)[J].化学科学与工程前沿,2022(07):1125-1138

dibromopyrazine,Oxytetracycline,h+played,spectrography,biodegrade

bismuth,oxyiodide,highly,exposed,facets,curved,carbon,nitride,photocatalytic,degradation,pollutants,wastewater,Crystalline,specific,atomic,arrangements,crystal,structures,exhibit,unique,functions,according,their,effects,quantum,size,physical,chemical,properties,In,this,study,novel,exposure,BiOI,prepared,denoted,designed,nanosheets,rich,oxygen,vacancies,by,regulation,Graphitic,DCN,which,contributed,significant,structural,distortion,plane,symmetry,improved,separation,charge,carriers,Novel,heterostructured,abundant,were,successfully,enhance,organic,It,demonstrated,that,complete,tight,contact,between,achieved,changing,OTC,methyl,blue,dyes,used,targets,efficiencies,respectively,observed,optimal,proportion,experi,mental,results,electron,spin,resonance,analysis,showed,O2,major,role,process,Additionally,resolution,liquid,chromatography,mass,identify,reaction,intermediates,possible,pathway,proposed,Finally,excellent,reusability,nanomaterials,confirmed,providing,new,approach,removal,antibiotics,difficult,Overall,has,been,proven,have,broad,prospects,improving,environ

0.504591