第41卷第3期2024年6月J.At.Mol.Phys.,2024,41:031004(7pp)原子与分子物理学报JOURNALOFATOMICANDMOLECULARPHYSICS基于第一性原理计算Ca掺杂MoS,对焊接气体的吸附性能Vol.41No.3Jun.2024吴浩伟,李海侠,刘钧,张巍钟,张善祥,于镇(桂林理工大学机械与控制工程学院,桂林541006)摘要:工业焊接的过程中会产生焊接废气例如CO、NO,和CH4,这些气体会对工作人员的身心健康造成威胁,为解决这种废气吸附的需求,此文用基于密度泛函理论的第一性原理方法,搭建了Ca掺杂MoS,的模型,用Dmol3模块研究掺杂后的电子结构,并计算了Ca-MoS,吸附CO、CH4和NO,三种气体的态密度、电荷转移、吸附能、电子密度差等参数:结果表明Ca-MoS,对于CH4是一种物理吸附,主要是范德华力作用,而Ca-MoS,吸附CO和NO,是一种化学吸附,存在较强的吸附能力.此类掺杂有望制成新的气敏传感器等有益结果,该工作具有一定意义:关键词:第一性原理;焊接废气;Ca掺杂MoS2;吸附性能中图分类号:0647.3CalculationoftheadsorptionpropertiesofCa-dopedMoS,forweldinggasbasedonfirst-principles文献标识码:AD01:10.19855/j.1000-0364.2024.031004WUHao-Wei,LIHai-Xia,LIUJun,ZHANGWei-Zhong,ZHANGShan-Xiang,YUZhen(SchoolofMechanicalandControlEngineering,GuilinUniversityofTechnology,Guilin541006,China)Abstract:Intheprocessofindustrialwelding,weldingwastegassuchasCO,NO,andCH4willbegenerated,whichwillposeathreattothephysicalandmentalhealthofworkers.Inordertosolvethisdemandforwastegasadsorption,inthispaper,weadoptedafirst-principlesmethodbasedondensityfunctionaltheoryandbuiltamodelofCa-dopedMoS,tostudytheelectronicstructureafterdopingwiththeDmol3module.Atthesametime,thedensityofstates,chargetransfer,adsorptionenergy,electrondensitydifferenceandotherparametersofCa-MoSadsorbingCO,CH4andNO2werecalculated.TheresultsshowthatCa-MoS,isaphysicaladsorp-tionforCH4,mainlyduetothevanderWaalsforce,whileCa-MoS2adsorptionofCOandNO,isachemicaladsorptionwiththestrongadsorptioncapacity.Thiskindofdopingisexpectedtoproducenewgassensorsandotherusefulresults,andthisworkhascertainsignificance.Keywords:Firstprinciples;Weldingwastegas;Ca-dopedMoS2;Adsorptionperformance有效的方法来吸附有毒气体,目前MoS,作为一种1引言新...