g-C3N4和TiO2基二元異質(zhì)-相結(jié)的有效構(gòu)筑及其光催化性能評價摘要：本文報道了一種g-C3N4和TiO2基二元異質(zhì)/相結(jié)的有效構(gòu)筑，并利用其進(jìn)行了光催化性能評價。首先采用水熱法合成得到g-C3N4和TiO2基材料，然后通過溶膠-凝膠法將其組裝成g-C3N4和TiO2的異質(zhì)/相結(jié)復(fù)合材料。利用X射線衍射、掃描電子顯微鏡、透射電子顯微鏡、紫外-可見漫反射光譜等手段對樣品進(jìn)行了表征，結(jié)果表明：g-C3N4和TiO2的異質(zhì)/相結(jié)復(fù)合材料表現(xiàn)出優(yōu)異的光催化性能。在可見光照射下，g-C3N4和TiO2的異質(zhì)/相結(jié)復(fù)合材料對甲基橙等染料的降解率較高，同時具有較好的光穩(wěn)定性和循環(huán)穩(wěn)定性。這項研究為g-C3N4和TiO2的異質(zhì)/相結(jié)構(gòu)開發(fā)提供了一個新思路，同時為光催化材料的進(jìn)一步研究提供了有益的參考。

關(guān)鍵詞：g-C3N4，TiO2，異質(zhì)/相結(jié)，光催化性能，復(fù)合材料

Abstract:Inthispaper,aneffectiveconstructionofbimetallichetero/phasestructurebasedong-C3N4andTiO2wasreported,anditsphotocatalyticperformancewasevaluated.First,theg-C3N4andTiO2basematerialsweresynthesizedbyhydrothermalmethod,andthenassembledintog-C3N4andTiO2hetero/phasestructurecompositematerialbysol-gelmethod.ThesampleswerecharacterizedbyX-raydiffraction,scanningelectronmicroscopy,transmissionelectronmicroscopy,uv-visdiffusereflectancespectroscopy,etc.Theresultsshowedthattheg-C3N4andTiO2hetero/phasestructurecompositematerialhadexcellentphotocatalyticperformance.Undervisiblelightirradiation,thedegradationrateofdyessuchasmethylorangewashigh,andithadgoodlightstabilityandcyclingstability.Thisstudyprovidesanewideaforthedevelopmentofg-C3N4andTiO2hetero/phasestructure,andalsoprovidesusefulreferenceforfurtherresearchonphotocatalyticmaterials.

Keywords:g-C3N4,TiO2,hetero/phasestructure,photocatalyticperformance,compositemateriaPhotocatalyticmaterialshavebeenwidelyusedinenvironmentalremediationandenergyproduction.Amongthem,g-C3N4andTiO2aretwocommonphotocatalyticmaterialsduetotheirexcellentcatalyticperformanceandstability.However,thephotocatalyticefficiencyofthesematerialsisoftenlimitedbytheirlowspecificsurfacearea,whichreducestheirabilitytoabsorblightandinteractwithpollutants.

Toimprovethephotocatalyticperformanceofg-C3N4andTiO2composites,researchershavedevelopedahetero/phasestructurecompositematerial.Thiscompositematerialhasbeenfoundtoexhibitexcellentphotocatalyticactivity,especiallyundervisiblelightirradiation.Thedegradationrateofdyessuchasmethylorangewasfoundtobehigh,indicatingthatthecompositematerialcouldeffectivelyremovepollutantsfromcontaminatedwaterandair.

Onemajoradvantageofthehetero/phasestructurecompositematerialisitsgoodcyclingstabilityandresistancetolightdegradation.Thismakesitapromisingcandidateforpracticalapplicationsinthefieldofenvironmentalremediation.Thestudyprovidesvaluableinsightsintothedesignanddevelopmentofhigh-performancephotocatalyticmaterials.

Inconclusion,thedevelopmentofg-C3N4andTiO2hetero/phasestructurecompositematerialsrepresentsanewstrategyforimprovingthephotocatalyticperformanceofthesematerials.FurtherresearchisneededtooptimizethesynthesisprocessandexplorethepotentialapplicationsofthisadvancedmaterialOnepotentialapplicationofg-C3N4andTiO2hetero/phasestructurecompositematerialsisinthedegradationoforganicpollutantsinwastewater.Thesematerialscanefficientlybreakdownorganiccompoundsintoharmlessproductsthroughphotocatalysis,thusreducingtheenvironmentalimpactofhazardouschemicals.

Anotherpossibleapplicationisintheremovalofheavymetalsfromcontaminatedwatersources.Theheterostructuredcompositematerialscaneffectivelyadsorbheavymetalionsontotheirsurfaces,followedbyphotocatalyticdegradationoftheadsorbedspecies.Thisapproachoffersasustainablesolutionforthemanagementofheavymetalpollutioninwaterresources.

Moreover,theg-C3N4andTiO2hetero/phasestructurecompositematerialscouldbeusedinairpurificationapplications.Theycanbreakdownpollutantssuchasvolatileorganiccompounds(VOCs)andnitrogenoxides(NOx)throughphotocatalyticreactions,thusimprovingairquality.

Anotherpotentialapplicationofthesematerialsisinthefabricationofself-cleaningsurfaces.Thephotocatalyticpropertiesofthecompositematerialscanbeutilizedtomakesurfacesthatareabletobreakdownanyorganicmatterthatsettlesonthem,thusreducingmaintenancecostsandimprovinghygieneinvariousapplications,includinghospitals,foodprocessingfacilities,andpublicrestrooms.

Insummary,theg-C3N4andTiO2hetero/phasestructurecompositematerialshavegreatpotentialforenvironmentalremediationapplications,includingwastewatertreatment,heavymetalremoval,airpurification,andself-cleaningsurfaces.FurtherresearchisneededtooptimizethesynthesisprocessandtoexplorethepotentialapplicationsofthisadvancedmaterialEnvironmentalremediationisofincreasingimportanceintoday'sworldastheEarth'sresourcesbecomemorestrainedandpollutionbecomesmorewidespread.Onepromisingavenueforenvironmentalcleanupistheuseofadvancedmaterials,suchastheg-C3N4andTiO2hetero/phasestructurecompositematerials.Thesematerialshaveshowngreatpotentialinavarietyofapplications,fromwastewatertreatmenttoairpurificationandself-cleaningsurfaces.

Oneareainwhichthesematerialscouldbeparticularlyeffectiveisintheremovalofheavymetalsfromwastewater.Heavymetalsareamajorsourceofpollutioninmanyindustrialsettings,andtheirpresenceinwastewatercanhaveseriousenvironmentalandhealthconsequences.Theg-C3N4andTiO2compositehasbeenshowntobehighlyeffectiveinremovingheavymetalsfromwater,duetoitshighsurfaceareaandphotocatalyticactivity.

Similarly,theg-C3N4andTiO2compositecouldbeusedinairpurificationapplications.Airpollutionisamajorprobleminmanypartsoftheworld,andtheabilitytoremovepollutantsfromtheairinanefficientandcost-effectivewaycouldhaveasignificantimpactonpublichealth.Thephotocatalyticpropertiesoftheg-C3N4andTiO2compositemakeitanattractivematerialforairpurification,asitcanbreakdownawiderangeofpollutants,includingvolatileorganiccompoundsandnitrogenoxides.

Anotherareainwhichthesematerialscouldbeusefulisinthedevelopmentofself-cleaningsurfaces.Self-cleaningsurfaceshaveawiderangeofapplications,fromreducingthespreadofdiseaseinhospitalstoimprovingthecleanlinessofpublicrestrooms.Theg-C3N4andTiO2compositehasbeenshowntohaveexcellentself-cleaningproperties,duetoitsphotocatalyticactivityandhydrophilicnature.

Overall,theg-C3N4andTiO2hetero/phasestructurecompositematerialshavetremendouspotentialforenvironmentalremediationapplications.Whilefurtherresearchisneededtooptimizetheirsynthesisprocessandexploretheirpotentialapplications,thebenefitsofthesematerialsareclear.Whetherusedforwastewatertreatment,airpurification,orself-cleaningsurfaces