不同类型有机物的光催化降解半导体光催化剂大多是n型半导体材料(当前以TiO2使用***广泛)，具有区别于金属或绝缘物质的特别的能带结构，即在价带和导带之间存在一个禁带。由于半导体的光吸收阈值与带隙具有公式K=1240/Eg(eV)的关系，因此常用的宽带隙半导体的吸收波长阈值大都在紫外区域。在光照下，如果光子的能量大于半导体禁带宽度，其价带上的电子(e-)就会被激发到导带上，同时在价带上产生空穴(h+)。当存在合适的俘获剂、表面缺陷或者其他因素时，电子和空穴的复合得到***，就会在催化剂表面发生氧化—还原反应。价带空穴是良好的氧化剂，导带电子是良好的还原剂，在半导体光催化反应中，一般与表面吸附的H2O、O2反应生成˙OH和超氧离子O2-，能够把各种有机物直接氧化成CO2、H2O等无机小分子，电子也具有强还原性，可以还原吸附在其表面的物质。激发态的导带电子和价带空穴能重新合并，并产生热能或其他形式散发掉。氧化性强：半导体光催化具有氧化性强的特点，对臭氧难以氧化的某些有机物如、四氯化炭、、都能有效地加以分解，所以对难以降解的有机物具有特别意义，光催化的有效氧化剂是羟基自由基（OH-）和超氧离子自由基（O2-、0-），其氧化性高于常见的臭氧、***、次氯酸等。***节能：光催化氧化利用人工紫外线灯管产生的真空波紫外光作为能源来活化光催化剂，驱动氧化—还原反应，电能消耗低，而且光催化剂在反应过程中并不消耗，利用空气中的氧作为氧化剂，有效地降解******废臭气体、节约能源成为光催化节约能源的特点。运行维护简单：设备构成精简、运行简单，只需要设置风机即可，无需专人管理和日常维护。光氧催化设备九大优点一、***除恶臭：能***去除挥发性有机物（VOC）、***、氨气、硫醇类、苯系物等主要污染物，以及各种恶臭味，净化、脱臭效率***高可达99%以上，净化、脱臭效果大大超过1993年颁布的恶臭污染物排放标准（GB14554-93）．二、无需添加任何物质：只需要设置相应的排风管道和排风动力，使工业废气通过本设备进行分解净化，无需添加任何物质参与化学反应。三、适应性强：可适应高浓度，大气量，不同工业废气物质的净化处理，可每天24小时连续工作，运行稳定可靠。四、性价比高：灯管寿命长，灯管寿命12000小时以上，是传统UV灯管的8倍。五、运行成本低：本设备无任何机械动作，无噪音，无需专人管理和日常维护，只需作定期检查，本设备能耗低，（每处理10000立方米/小时，仅耗电约7.5度电能），设备风阻极低＜400pa,可节约大量排风动力能耗。六、无需预处理：工业废气无需进行特殊的预处理，如加温、加湿等,设备工作环境温度在摄氏-20℃－60℃之间，湿度在30%－98%、PH值在3-11之间均可正常工作。七、设备占地面积小，自重轻：适合于布置紧凑、场地狭小等特殊条件，设备占地面积＜1平方米/处理10000m3/h风量。八、优质进口材料制造：防火、防腐蚀性能高，性能稳定，使用寿命长。九、环保科技产品：采用***技术理念，可彻底分解工业废气中******物质，并能达到***的净化效果，经分解后的气体，可完全达到无害化排放，***产生二次污染，同时达到***消***菌的作用。喷淋塔工作原理酸雾废气由风管引入净化塔，经过填料层，废气与***吸收液进***液两相充分接触吸收中和反应，酸雾废气经过净化后，再经除雾板脱水除雾后由风机排入大气。吸收液在塔底经水泵增压后在塔顶喷淋而下，***后回流至塔底循环使用。净化后的酸雾废气达到广东省地方排放标准的排放要求，低于排放标准。Thephotocatalyticphotocatalystsforphotocatalyticdegradationofdifferenttypesoforganiccompoundsaremostlyntypesemiconductormaterials(currentlyusedmostwidelyinTiO2),withaspecialbandstructuredifferentfrommetalorinsulatingmaterial,thatis,abandgapexistsbetweenvalencebandandguideband.Duetotherelati***hipbetweentheopticalabsorptionthresholdofsemiconductorsandthebandgapwithformulaK=1240/Eg(eV),theabsorptionw***elengththresholdofthecommonlyusedbroadbandgapsemiconductorsismostlyintheultr***ioletregion.Inlight,iftheenergyofthephotonisgreaterthanthewidthofthesemiconductorband,theelectron(e-)onthevalencebandisexcitedtotheguideband,andahole(h+)isproducedonthevalenceband.Whentherearesuitabletrappingagents,surfacedefects,orotherfactors,therecombinationofelectr***andholesissuppressed,andtheoxidation-reductionreactionwilloccuronthesurfaceofthecatalyst.Thevalencebandholeisagoodoxidizer.Theconductionbandelectronisagoodreducingagent.Inthesemiconductorphotocatalyticreaction,thereactionofH2OandO2,whichisadsorbedonthesurface,producesOHandO2-,whichcandirectlyoxidizevariousorganiccompoundsinto***allinorganicmoleculessuchasCO2,H2Oandsoon.Theelectr***alsoh***estrongreducibilityandcanbereducedtothembyreduction.Asurfacematerial.Theconductionbandelectr***andvalencebandholesintheexcitedstatecanberecombinedandgenerateheatorotherforms.Strongoxidation:Semiconductorphotocatalysishasthecharacteristicsofstrongoxidation,whichcanbeeffectivelydecomposedforsomeorganiccompounds,suchasfourchlorinatedcarbon,whicharedifficulttooxidizebyozone,soitisofspecialsignificancetothedifficulttodegradeorganicmatter.Theeffectiveoxidizingagentforphotocatalyticoxidationisthehydroxylradical(OH-)andthesuperoxideradical(O2-,0-),anditsoxidationSexishigherthanozone,hydrogenperoxide,hypochloriteandsoon.Highefficiencyandenergys***ing:Thephotocatalyticoxidationusesthevacuumultr***ioletlightproducedbytheartificialultr***ioletlampasenergytoactivatethephotocatalyst,whichdrivestheoxidationreductionreaction,theenergyc***umptionislow,andthephotocatalystisnotc***umedduringthereactionprocess,andtheoxygenintheairisusedastheoxidanttoeffectivelyreducethetoxicandharmfulodorgasands***eenergy.Itisthecharacteristicofphotocatalyticenergys***ing.Theoperationandmaintenanceissimple:Theequipmentissimpleandsimpletooperate.Itonlyneedstosetupafan,andnoneedforpersonalmanagementandroutinemaintenance.NineadvantagesofopticaloxygencatalyticequipmentOne,efficientodorremoval:theefficiencyofremovalofvolatileorganiccompounds(VOC),hydrogensulfide,ammonia,mercaptan,benzeneseriesandothermajorpollutants,aswellastheodorofallkindsofodor,ismorethan99%oftheefficiencyofpurificationanddeodorization.Theeffectofpurificationanddeodorizationismuchmorethantheemissionstandardofodorpollutants(GB14554-93)issuedin1993.Two,noneedtoaddanymaterial:onlyneedtosetthecorrespondingexhaustpipeandexhaustpowertomakeindustrialexhaustgasthroughthisequipmenttodecomposeandpurify,withoutaddinganymaterialtoparticipateinchemicalreaction.Three.Strongadaptability:itcanbeusedtopurifyhighconcentration,airquantityanddifferentindustrialwastegases.Itcanworkcontinuously24hoursaday,andrunsstablyandreliably.Four,highcostperformance:longtubelife,lamplifemorethan12000hours,is8timesthetraditionalUVlamp.Five,lowoperatingcost:theequipmenthasnomechanicalaction,nonoise,nospecialmanagementanddailymaintenance,onlyaregularinspection,lowenergyc***umptionofthisequipment,(10000cubicmetersperhourperhour,only7.5kilowatthourspowerc***umption),theequipmentwindresistanceisverylow<400pa,cans***ealotofexhaustpowerenergyc***umption.Six,noneedtopretreat:industrialwastegasneedsnospecialpretreatment,suchasheatingandhumidification,theworkingenvironmenttemperatureoftheequipmentisbetween-20Cand60C,thehumidityisbetween30%to90%andthepHvalueis3-11.Seven,theequipmenthas***allareaandlightselfweight:itissuitableforthespecialconditi***suchascompactlayout,***allspaceandsoon.Theequipmentcoversanareaoflessthan1squaremeters/10000m3/hairvolume.Eight.Highqualityimportedmaterialsmanufacture:highfire-retardant,anti-corrosionperformance,stableperformanceandlongservicelife.Nine,environmentalprotectionandtechnologyproducts:usingadvancedtechnologyconcept,itcancompletelydecomposetoxicandharmfulsubstancesinindustrialwastegasandachieveperfectpurificationeffect.Afterdecomposedgas,itcancompletelyachieveharmlessemission,neverproducetwopollution,andachieveeffectivedisinfectionandsterilization.WorkingprincipleofsprinklertowerTheacidfogwastegasisintroducedintothepurifyingtowerbythewindpipe.Thegasandliquidtwophaseabsorptionneutralizationreactioniscarriedoutbytheexhaustgasandthesodiumhydroxideabsorptionliquid.Theacidmistexhaustgasispurifiedandthendrainedintotheatmospherebythedehydrationofthemistremovalplateandthemisteliminator.Theabsorptionliquidispressurizedbythepumpatthebottomofthetowerandthensprayeddownatthetopofthetower.Finally,itisrecycledtothebottomofthetowerforrecycling.Afterpurification,thewastegasofacidmistreachesthedischargestandardoflocaldischargestandardinGuangdong,andislowerthanthedischargestandard.)